Patent Publication Number: US-11397352-B1

Title: Display apparatus comprising a reflective sheet having a plurality of first and second light conversion patches respectively arranged around a circumference of first and second holes

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage application of International Application No. PCT/KR2021/002835 filed on Mar. 8, 2021, which claims priority from Korean Patent Application No. 10-2021-0000892, filed on Jan. 5, 2021 and Korean Patent Application No. 10-2021-0015416, filed on Feb. 3, 2021, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entireties. 
     BACKGROUND 
     1. Field 
     The present disclosure relates to a display apparatus and more particularly, to a display apparatus having a thin thickness, and a light source module thereof. 
     2. Description of Related Art 
     Generally, a display apparatus converts obtained or stored electrical information into visual information and displays the visual information to a user. The display apparatus is used in various fields such as home or workplace. 
     The display apparatus includes a monitor apparatus connected to a personal computer or a server computer, a portable computer device, a navigation terminal device, a general television apparatus, an Internet Protocol television (IPTV), a portable terminal device, such as a smart phone, a tablet PC, a personal digital assistant (PDA) or a cellular phone, various display apparatuses used to reproduce images, such as advertisements or movies in an industrial field, or various kinds of audio/video systems. 
     The display apparatus includes a light source module configured to convert electrical information into visual information, and the light source module includes a plurality of light sources configured to independently emit light. Each of the plurality of light sources includes, for example, a light emitting diode (LED) or an organic light emitting diode (OLED). For example, the LED or the OLED may be mounted on a circuit board or a substrate. 
     Recently, display apparatuses have become thinner and thinner. In order to provide a thin display apparatus, a light source module must also become thinner. Because a thickness of the light source module is reduced, a light source may be miniaturized and the number of light sources disposed in the light source module may be increased. The miniaturization of the light source and the increase in the number of light sources may cause optical defects (for example, unevenness) of the light source module. 
     SUMMARY 
     The present disclosure is directed to providing a display apparatus capable of preventing or suppressing an optical defect (for example, unevenness). 
     One aspect of the present disclosure provides a display apparatus including a liquid crystal panel and a light source apparatus configured to irradiate light to the liquid crystal panel. The light source apparatus includes a plurality of light sources configured to emit blue light, and a reflective sheet in which a plurality of holes, through which the plurality of light sources is passed, respectively, is formed. The plurality of holes includes a first hole disposed at an edge portion of the reflective sheet, and a second hole in which a distance from the edge of the reflective sheet is greater than a distance between the edge of the reflective sheet and the first hole. The light source apparatus further includes a plurality of first light conversion patches arranged along a circumference of a circle surrounding the first hole on the reflective sheet, and a plurality of second light conversion patches arranged along a circumference of a circle surrounding the second hole on the reflective sheet. A size of each of the plurality of first light conversion patches is greater than a size of each of the plurality of second light conversion patches, and each of the plurality of first and second light conversion patches includes at least one of a yellow fluorescent material, a yellow dye, or a yellow pigment. 
     Another aspect of the present disclosure provides a display apparatus including a liquid crystal panel, and a light source apparatus configured to irradiate light to the liquid crystal panel. The light source apparatus includes a plurality of light sources configured to emit blue light and a reflective sheet in which a plurality of holes, through which the plurality of light sources is passed, respectively, is formed. The plurality of holes includes a first hole disposed at an edge portion of the reflective sheet, and a second hole farther away from the edge of the reflective sheet in comparison with the first hole. The light source apparatus further includes first light conversion patches arranged around the first hole on the reflective sheet, and second light conversion patches arranged around the second hole on the reflective sheet. An area density of the first light conversion patches is greater than an area density of the second light conversion patches. 
     Yet another aspect of an exemplary embodiment of the present disclosure provides a display apparatus including a liquid crystal panel, and a light source apparatus configured to irradiate the liquid crystal panel with light. The light source apparatus includes a plurality of light sources configured to emit blue light, and a reflective sheet including a plurality of holes through which the light emitted from the plurality of light sources passes. The plurality of holes includes a first hole disposed at an edge portion of the reflective sheet, and a second hole in which a distance from an edge of the reflective sheet to the second hole is greater than a distance between the edge of the reflective sheet and the first hole. Additionally, the light source apparatus further includes a plurality of first light conversion patches arranged along a circumference of a circle surrounding the first hole on the reflective sheet, and a plurality of second light conversion patches arranged along a circumference of a circle surrounding the second hole on the reflective sheet. A size of each of the plurality of first light conversion patches is greater than a size of each of the plurality of second light conversion patches, and the plurality of first light conversion patches and second light conversion patches include at least one of a yellow fluorescent material, a yellow dye, or a yellow pigment. 
     An additional aspect of an exemplary embodiment provides a display apparatus including a liquid crystal panel and a light source apparatus configured to irradiate light to the liquid crystal panel with light. The light source apparatus includes a plurality of light sources configured to emit blue light and a reflective sheet in which a plurality of holes, through which the light emitted from the plurality of light sources passes. The plurality of holes include a first hole disposed at an edge portion of the reflective sheet and a second hole disposed farther away from the an edge of the reflective sheet in comparison with the first hole. The light source apparatus further includes a plurality of first light conversion patches arranged around the first hole on the reflective sheet, and a plurality of second light conversion patches arranged around the second hole on the reflective sheet. Finally, an area density of the plurality of first light conversion patches is greater than an area density of the plurality of second light conversion patches. 
     A display apparatus according to an aspect of the present disclosure may prevent or suppress an optical defect (for example, uneveness). 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a view of an appearance of a display apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 2  is an exploded view of the display apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 3  is a view of a liquid crystal panel of the display apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 4  is an exploded view of a light source apparatus of the display apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 5  is a perspective view of a light source included in the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 6  is a view of an example of a light emitting diode included in the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 7  is a view of a travel path of light in the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 8  is a view of a travel path of light at a center portion and an edge portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 9  is a view of a light conversion patch arranged on the edge portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 10  is a view of an example of an arrangement of the light conversion patch of left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 11  is a view of an example of an arrangement of the light conversion patch of a corner portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 12  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 13  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 14  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 15  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 16  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 17  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 18  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 19  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 20  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 21  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
         FIG. 22  is a view of an example of the light conversion patch arranged on the edge portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In the following description, like reference numerals refer to like elements throughout the specification. Well-known functions or constructions are not described in detail since they would obscure the one or more exemplary embodiments with unnecessary detail. Terms such as “unit”, “module”, “member”, and “block” may be embodied as hardware or software. According to embodiments, a plurality of “unit”, “module”, “member”, and “block” may be implemented as a single component or a single “unit”, “module”, “member”, and “block” and may also include a plurality of components. 
     When an element is referred to as being “connected” to another element, it can be directly or indirectly connected to the other element, wherein the indirect connection includes “connection via a wireless communication network”. 
     Also, when a part “includes” or “may include” an element, unless there is a particular description contrary thereto, the part may further include additional elements, not excluding the other elements. 
     When a first member is “on” a second member, the first member is in contact with the second member, but also includes when there is a third member between the first and second members. 
     Although the terms first, second, third, etc., may be used herein to describe various elements, is the elements should not be limited by these terms. These terms are only used to distinguish one element from another element. 
     As used herein, the singular forms “a,” “an” and “the” include the plural forms of the words as well, unless the context clearly indicates otherwise. 
     An identification code is used for the convenience of the description but is not intended to illustrate the order of each step. Each step may be implemented in an order different from the illustrated order unless the context clearly indicates otherwise. 
     Hereinafter exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a view depicting of a display apparatus according to an exemplary embodiment of the disclosure. 
     A display apparatus  1  is a device that processes an image signal received from an outside source and visually displays the processed image. Hereinafter an exemplary embodiment of a display apparatus  1  that is a television is described, but the present disclosure is not limited thereto. For example, the display apparatus  1  may be implemented in various forms, such as a monitor, a portable multimedia device, and a portable communication device and the display apparatus  1  is not limited in its shape as long as the display apparatus  1  visually displays an image. 
     The display apparatus  1  may be a large format display (LFD) installed outdoors, such as a roof of a building or a bus stop. The LFD display apparatus  1  is not limited to the outside of a building, and thus the display apparatus  1  according to an exemplary embodiment may be installed in any place where the display apparatus is viewable by a large number of people, including indoors such as in subway stations, shopping malls, movie theaters, companies, and stores. 
     The display apparatus  1  may receive content data including video data and audio data from various content sources and output video and audio corresponding to the video data and the audio data. For example, the display apparatus  1  may receive content data through a broadcast reception antenna or cable, receive content data from a content playback device, or receive content data from a content provider&#39;s content server. 
     As illustrated in  FIG. 1 , the display apparatus  1  may include a body  11 , and/or a screen  12  configured to display an image I. 
     The body  11  may form an appearance, e.g., a border, of the display apparatus  1 , and the body  11  may include a component configured to allow the display apparatus  1  to display the image I and to perform various functions. Although the body  11  shown in  FIG. 1  is in the form of a flat plate, the shape of the body  11  is not limited thereto. For example, the body  11  may have a curved plate shape. 
     The screen  12  may be formed on a front surface of the body  11 , and display the image I. For example, the screen  12  may display a still image or a moving image. Further, the screen  12  may display a two-dimensional plane image or a three-dimensional image to the user using binocular parallax. 
     For example, the screen  12  may include a self-emission panel (for example, a light emitting diode panel or an organic light emitting diode panel) configured to directly emit light, or a non-self-emission panel (for example, a liquid crystal panel) configured to transmit or block light emitted by a light source apparatus (for example, a backlight unit). 
     A plurality of pixels P may be formed on the screen  12  and the image I displayed on the screen  12  may be formed by the light emitted from the plurality of pixels P. For example, a single still image may be formed on the screen  12  by combining light emitted from the plurality of pixels P as a mosaic. 
     Each of the plurality of pixels P may emit different brightness and different color of light. In order to emit light in the various colors, the plurality of pixels P may include sub-pixels P R , P G , and P B . 
     The sub-pixels may include a red sub pixel P R  emitting red light, a green sub pixel P G  emitting green light, and a blue sub pixel P B  emitting blue light. For example, the red light may represent a light beam having a wavelength of approximately 620 nm (nanometers, one billionth of a meter) to 750 nm, the green light may represent a light beam having a wavelength of approximately 495 nm to 570 nm, and the blue light may represent a light beam having a wavelength of approximately 450 nm to 495 nm. 
     By combining the red light of the red sub pixel P R , the green light of the green sub pixel P G  and the blue light of the a blue sub pixel P B , each of the plurality of pixels P may emit different brightness and different color of light. 
       FIG. 2  is an exploded view of the display apparatus according to an exemplary embodiment of the present disclosure.  FIG. 3  is a view of a liquid crystal panel of the display apparatus according to an exemplary embodiment of the present disclosure. 
     As shown in  FIG. 2 , various components configured to generate the image I on the screen  12  may be provided inside the body  11 . 
     For example, the body  11  includes a light source apparatus  100  that is a surface light source, a liquid crystal panel  20  configured to block or transmit light emitted from the light source apparatus  100 , a control assembly  50  configured to control an operation of the light source apparatus  100  and the liquid crystal panel  20 , and a power assembly  60  configured to supply power to the light source apparatus  100  and the liquid crystal panel  20 . Further, the body  11  may include a bezel  13 , a frame middle mold  14 , a bottom chassis  15 , and a rear cover  16  which are configured to support and fix the liquid crystal panel  20 , the light source apparatus  100 , the control assembly  50 , and the power assembly  60 . 
     The light source apparatus  100  may include a point light source configured to emit monochromatic light or white light. The light source apparatus  100  may refract, reflect, and/or scatter light in order to convert light, which is emitted from the point light source, into uniform surface light. As mentioned above, the light source apparatus  100  may refract, reflect, and/or scatter light, which is emitted from the point light source, thereby emitting uniform surface light toward the front. 
     A configuration of the light source apparatus  100  will be described in more detail below. 
     The liquid crystal panel  20  is provided in front of the light source apparatus  100  and blocks or transmits light emitted from the light source apparatus  100  to form the image I. 
     A front surface of the liquid crystal panel  20  may form the screen  12  of the display apparatus  1  described above, and the liquid crystal panel  20  may form the plurality of pixels P. In the liquid crystal panel  20 , the plurality of pixels P may independently block or transmit light of the light source apparatus  100 , and the light transmitted through the plurality of pixels P may form the image I displayed on the screen  12 . 
     For example, as shown in  FIG. 3 , the liquid crystal panel  20  may include a first polarizing film  21 , a first transparent substrate  22 , a pixel electrode  23 , a thin film transistor  24 , a liquid crystal layer  25 , a common electrode  26 , a color filter  27 , a second transparent substrate  28 , and a second polarizing film  29 . 
     The first transparent substrate  22  and/or the second transparent substrate  28  may fixedly support the pixel electrode  23 , the thin film transistor  24 , the liquid crystal layer  25 , the common electrode  26 , and/or the color filter  27 . The first transparent substrate  22  and/or the second transparent substrate  28  may be formed of tempered glass or transparent resin. 
     The first polarizing film  21  and/or the second polarizing film  29  are provided on the outside of the first transparent substrate  22  and/or the second transparent substrate  28 . Each of the first polarizing film  21  and the second polarizing film  29  may transmit a specific polarized light beam and block (reflect or absorb) other polarized light beams. For example, the first polarizing film  21  transmits polarized light beams in a first direction and blocks (reflect or absorb) other polarized light beams. In addition, the second polarizing film  29  transmits polarized light beams in a second direction and blocks (reflect or absorb) other polarized light beams. In this case, the first direction and the second direction may be perpendicular to each other. Accordingly, the polarized light beam transmitted through the first polarizing film  21  may not pass through the second polarizing film  29 . 
     The color filter  27  may be provided inside the second transparent substrate  28 . The color filter  27  may include a red filter  27 R transmitting red light, a green filter  27 G transmitting green light, and a blue filter  27 G transmitting blue light. The red filter  27 R, the green filter  27 G, and the blue filter  27 B may be disposed parallel to each other. A region in which the color filter  27  is formed corresponds to the pixel P described above. A region in which the red filter  27 R is formed corresponds to the red sub-pixel P R , a region in which the green filter  27 G is formed corresponds to the green sub-pixel P G , and a region in which the blue filter  27 B is formed corresponds to the blue sub-pixel P B . 
     The pixel electrode  23  may be provided inside the first transparent substrate  22 , and the common electrode  26  may be provided inside the second transparent substrate  28 . The pixel electrode  23  and the common electrode  26  may be formed of a metal material through which electricity is conducted. The pixel electrode  23  and the common electrode  26  may generate an electric field to change the arrangement of liquid crystal molecules  25   a  forming the liquid crystal layer  25  to be described below. 
     The thin film transistor (TFT)  24  is provided inside the second transparent substrate  22 . The TFT  24  may transmit or block a current flowing through the pixel electrode  23 . For example, an electric field may be formed or removed between the pixel electrode  23  and the common electrode  26  in response to turning on (closing) or turning off (opening) the TFT  24 . 
     The liquid crystal layer  25  is formed between the pixel electrode  23  and the common electrode  26 . The liquid crystal layer  25  is filled with the liquid crystal molecules  25   a . Liquid crystals represent an intermediate state between a solid (crystal) and a liquid. Liquid crystals also exhibit optical properties according to changes in an electric field. For example, in the liquid crystal, the direction of an arrangement of molecules forming the liquid crystal may change according to a change in an electric field. As a result, the optical properties of the liquid crystal layer  25  may vary depending on the presence or absence of an electric field transmitted through the liquid crystal layer  25 . 
     A cable  20   a  configured to transmit image data to the liquid crystal panel  20 , and a display driver integrated circuit (hereinafter referred to as ‘panel driver’)  30  configured to process digital image data and output an analog image signal are provided at one side of the liquid crystal panel  20 . 
     The cable  20   a  may electrically connect the control assembly  50  and/or the power assembly  60  to the panel driver  30 , and may also electrically connect the panel driver  30  to the liquid crystal panel  20 . The cable  20   a  may include a flexible flat cable or a film cable that is bendable. 
     The panel driver  30  may receive image data and/or power from the control assembly  50  and/or the power assembly  60  through the cable  20   a . The panel driver  30  may transmit the image data and driving current to the liquid crystal panel  20  through the cable  20   a.    
     In addition, the cable  20   a  and the panel driver  30  may be integrally implemented as a film cable, a chip on film (COF), or a tape carrier package (TCP). In other words, the panel driver  30  may be disposed on the cable  20   a . However, the disclosure is not limited thereto, and the panel driver  30  may be disposed on the liquid crystal panel  20 . 
     The control assembly  50  may include a control circuit configured to control an operation of the liquid crystal panel  20  and the light source apparatus  100 . For example, the control circuit may process image data received from an external content source, transmit the image data to the liquid crystal panel  20 , and transmit dimming data to the light source apparatus  100 . 
     The power assembly  60  may supply power to the light source apparatus  100  to allow the light source apparatus  100  to output surface light and the power assembly  60  may supply power the liquid crystal panel  20  to allow the liquid crystal panel  20  to block or transmit the light of the light source apparatus  100 . 
     The control assembly  50  and the power assembly  60  may be implemented with a printed circuit board and various circuits mounted on the printed circuit board. For example, the power circuit may include a capacitor, a coil, a resistance element, a processor, and a power circuit board on which the capacitor, the coil, the resistance element, and the processor are mounted. Further, the control circuit may include a memory, a processor, and a control circuit board on which the memory and the processor are mounted. 
       FIG. 4  is an exploded view of a light source apparatus of the display apparatus according to an exemplary embodiment of the present disclosure.  FIG. 5  is a perspective view of a light source included in the light source apparatus according to an exemplary embodiment of the present disclosure.  FIG. 6  is a view of an example of the light emitting diode included in the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 4 , the light source apparatus  100  may include a light source module  110  configured to generate light, a reflective sheet  120  configured to reflect light, a diffuser plate  130  configured to uniformly diffuse light, and an optical sheet  140  configured to improve luminance of light that is emitted. 
     The light source module  110  may include a plurality of light sources  111  configured to emit light, and a substrate  112  configured to support/fix the plurality of light sources  111 . 
     The plurality of light sources  111  may be arranged in a predetermined pattern to allow light to be emitted with uniform luminance. The plurality of light sources  111  may be arranged in such a way that a distance between one light source and light sources adjacent thereto is the same. 
     For example, as shown in  FIG. 4 , the plurality of light sources  111  may be arranged in rows and columns. Accordingly, the plurality of light sources  111  may be arranged such that an approximately square is formed by four adjacent light sources. In addition, any one light source may be disposed adjacent to four light sources, and a distance between one light source and four adjacent light sources may be approximately the same. 
     Alternatively, the plurality of light sources may be disposed in a plurality of rows, and a light source belonging to each row may be disposed at the center of two light sources belonging to an adjacent row. Accordingly, the plurality of light sources may be arranged such that an approximately equilateral triangle is formed by three adjacent light sources. In this case, one light source may be disposed adjacent to six light sources, and a distance between one light source and six adjacent light sources may be approximately the same. 
     However, the pattern in which the plurality of light sources  111  is disposed is not limited to the pattern described above, and the plurality of light sources  111  may be disposed in various patterns to allow light to be emitted with uniform luminance. 
     The light source  111  may employ an element configured to emit monochromatic light (light of a specific wavelength or light of a single peak wavelength, for example, blue light) or white light (light of a plurality of peak wavelengths, for example, light of a mixture of red light, green light, and blue light) in various directions by receiving power. 
     Each of the plurality of light source  111  may include a light emitting diode (LED)  190 , and an optical dome  180 . 
     To reduce a thickness of the display apparatus  1 , a thickness of the optical device  100  may be reduced. A thickness of each of the plurality of light sources  111  is reduced to allow the thickness of the optical device  100  to be reduced resulting in a simplified structure. 
     The LED  190  may be directly attached to the substrate  112  in a Chip On Board (COB) method. In other words, the light source  111  may include the LED  190  where a light emitting diode chip or a light emitting diode die is directly attached to the substrate  112  without an additional package. 
     The LED  190  may be manufactured in the flip chip type. As for the flip-chip type LED  190 , when attaching the light emitting diode corresponding to a semiconductor device to the substrate  112 , an intermediate medium, such as a metal lead (wire) or a ball grid array (BGA) may not be used. Instead, an electrode pattern of the semiconductor device may be fused to the substrate  112  as it is. Accordingly, because the metal lead (wire) or the ball grid array is omitted, the light source  111  including the flip-chip type LED  190  may be miniaturized. 
     For example, the LED  190  may be a Distributed Bragg Reflector (DBR) based LED including a DBR, as shown in  FIG. 6 . 
     The LED  190  may include a transparent substrate  195 , an n-type semiconductor layer  193  (for example, n-type GaN, or n-type gallium nitride) and a p-type semiconductor layer  192  (for example, p-type GaN, or p-type gallium nitride). Between the n-type semiconductor layer  193  and the p-type semiconductor layer  192 , a multi-quantum well (MQW) layer  194  and an electron-blocking layer (EBL)  197  are formed. In response to a current being supplied to the LED  190 , electrons and holes are recombined in the MQW layer  194  and thus light may be emitted. 
     A first electrode  191   a  of the LED  190  is in electrical contact with the p-type semiconductor layer  192 , and a second electrode  191   b  is in electrical contact with the n-type semiconductor layer  193 . The first electrode  191   a  and the second electrode  191   b  may function not only as electrodes, but also as reflectors configured to reflect light. 
     A DBR layer  196  is provided on the outside of the transparent substrate  195 . The DBR layer  196  may be formed by laminating a material having a different refractive index, and the DBR layer  196  may reflect incident light. Because the DBR layer  196  is provided outside the transparent substrate  195  (an upper side in the drawing), light perpendicularly incident on the DBR layer  196  may be reflected by the DBR layer  196 . Therefore, an intensity of light, which is emitted in a direction perpendicular to the DBR layer  196  (an upward direction of the light emitting diode in the drawing) D 1 , is less than an intensity of light, which is emitted in a direction inclined with respect to the DBR layer  196  (for example, a direction inclined by approximately 60 degrees from the upward direction in the drawing) D 2 . In other words, the LED  190  may emit stronger light in a lateral direction than in a vertical direction. 
     In the above description, the flip-chip type LED  190  directly fused on the substrate  112  in the COB method has been described, but the light source  111  is not limited to the flip-chip type LED  190 . For example, the light source  111  may include a package type LED. 
     The optical dome  180  may cover the LED  190 . The optical dome  180  may prevent or suppress damages to the LED  190  caused by an external mechanical action and/or damage to the LED  190  caused by to a chemical action. 
     The optical dome  180  may have a dome shape formed in such a way that a sphere is cut into a surface not including the center thereof, or may have a hemispherical shape in such a way that a sphere is cut into a surface including the center thereof. A vertical cross section of the optical dome  180  may be a bow shape or a semicircle shape. 
     The optical dome  180  may be formed of silicone or epoxy resin. For example, the molten silicon or epoxy resin may be discharged onto the LED  190  through a nozzle, and the discharged silicon or epoxy resin may be cured, thereby forming the optical dome  180 . 
     Accordingly, the shape of the optical dome  180  may vary depending on the viscosity of the liquid silicone or epoxy resin. For example, the optical dome  180  is manufactured using silicon having a thixotropic index of about 2.7 to 3.3 (appropriately, 3.0). Additionally, the optical dome  180  may be formed with a dome ratio indicating a ratio of a height of a dome with respect to a diameter of a base of the dome (the height of the dome/the diameter of the base) of approximately 0.25 to 0.31 (appropriately 0.28). For example, the optical dome  180  formed of silicon having a thixotropic index of approximately 2.7 to 3.3 (appropriately 3.0) may have a diameter of approximately 2.5 mm (millimeter; 1/1,000 meter). The diameter of the optical dome  180  may have an error margin of approximately ±20%, and may be between approximately 2.0 mm and 3.0 mm. The height of the optical dome  180  may of approximately 0.7 mm. The height of the optical dome  180  may have an error margin of approximately ±20% and may be between approximately 0.5 mm and 0.9 mm. 
     However, the diameter (or size) of the optical dome  180  is not limited thereto and thus the diameter (or size) of the optical dome  180  may be approximately several hundred μm (micrometers; 1/1,000,000 meter) to several tens of mm. 
     The optical dome  180  may be optically transparent or translucent. Light emitted from the LED  190  may pass through the optical dome  180  and be emitted to the outside. 
     In this case, the dome-shaped optical dome  180  may refract light like a lens. For example, light emitted from the LED  190  may be refracted by the optical dome  180  and thus may be dispersed. 
     As mentioned above, the optical dome  180  may protect the LED  190  from external mechanical and/or chemical or electrical actions, as well as dispersing light emitted from the LED  190 . 
     In the above description, the optical dome  180  in the form of a silicon dome has been described, but the light source  111  is not limited to including the optical dome  180 . For example, the light source  111  may include a lens for dispersing light emitted from the LED. 
     The substrate  112  may fix the plurality of light sources  111  to prevent a change in the position of the light source  111 . Further, the substrate  112  may supply power, which is for the light source  111  to emit light, to the light source  111 . 
     The substrate  112  may support/fix the plurality of light sources  111  and may be configured with a synthetic resin, tempered glass, or a printed circuit board (PCB) on which a conductive power supply line for supplying power to the light source  111  is formed. 
     The reflective sheet  120  may reflect light emitted from the plurality of light sources  111  forward or in a direction close to the front. 
     In the reflective sheet  120 , a plurality of through holes  120   a  is formed at positions corresponding to each of the plurality of light sources  111  of the light source module  110 . In addition, the light source  111  of the light source module  110  may pass through the through hole  120   a  and protrude to the front of the reflective sheet  120 . Accordingly, the plurality of light sources  111  may emit light in front of the reflective sheet  120 . The reflective sheet  120  may reflect light, which is emitted toward the reflective sheet  120  from the plurality of light sources  111 , to the diffuser plate  130 . 
     A size and arrangement of the through-holes  120   a  may depend on a size and arrangement of the light source  111 . For example, based on a diameter of the light source  111  being approximately 2.5 mm, a diameter of the through holes  120   a  may be appropriately 4.5 mm. The diameter of the through holes  120   a  may have an error margin of approximately ±20%, and may be between approximately 3.5 mm and 5.5 mm. In addition, a distance between the centers of the through holes  120   a  may be appropriately 11 mm. The distance between the centers of the through holes  120   a  may have an error margin of approximately ±20%, and may be between approximately 8.5 mm and 13.5 mm. 
     The diffuser plate  130  may be provided in front of the light source module  110  and/or the reflective sheet  120  and may evenly distribute the light emitted from the light source  111  of the light source module  110 . 
     As described above, the plurality of light sources  111  is located at equal intervals on the rear surface of the light source apparatus  100 . Accordingly, unevenness in luminance may occur according to the positions of the plurality of light sources  111 . 
     The diffuser plate  130  may diffuse light emitted from the plurality of light sources  111  within the diffuser plate  130  in order to remove unevenness in luminance caused by the plurality of light sources  111 . In other words, the diffuser plate  130  may uniformly emit uneven light of the plurality of light sources  111  to the front surface. 
     The optical sheet  140  may include various sheets for improving luminance and uniformity of luminance. For example, the optical sheet  140  may include a light conversion sheet  141 , a diffusion sheet  142 , a prism sheet  143 , and a reflective polarizing sheet  144 . 
     The light conversion sheet  141  may convert a wavelength of a portion of incident light. For example, the light conversion sheet  141  may include a quantum dot (QD) material or a fluorescent material. Depending on the constituent material, the light conversion sheet  141  may be referred to as a fluorescent sheet or a quantum dot sheet. 
     Quantum dots are nanometers (nm; 1/1,000,000,000 meter) of small sphere-shaped semiconductor particles, and the quantum dot includes about 2 nanometers [nm] to 10 [nm] of a core and a shell formed of zinc sulfide (ZnS). The core of the quantum dot may be formed of cadmium selenite (CdSe), cadmium telluride (CdTe), or cadmium sulfide (CdS). 
     The quantum dot emits a particular wavelength of light when an electric field is applied or when absorbing high energy light. In this case, the wavelength of the emitted light may depend on the size of the quantum dot. The smaller quantum dot may emit the shorter wavelength of light, and the larger quantum dot may emit the longer wavelength of light. For example, a quantum dot having a diameter of approximately 2 nm may emit approximately blue light, a quantum dot having a diameter of approximately 3 nm may emit approximately green light, and a quantum dot having a diameter of approximately 6 nm may emit approximately red light. 
     A material in which the quantum dot having the diameter of approximately 3 nm and the quantum dot having the diameter of approximately 6 nm are mixed may absorb blue light or ultraviolet light and emit green light and/or red light. For example, when blue light or ultraviolet light is incident on the light conversion sheet  141  on which a quantum dot having the diameter of approximately 3 nm and a quantum dot having the diameter of approximately 6 nm are mixed, a portion of blue light or ultraviolet light may be converted into green light and/or red light, and another portion of the light may pass through the light conversion sheet  141 . As a result, white light in which blue light, green light, and/or red light are mixed may be emitted from the light conversion sheet  141 . 
     The fluorescent material may convert blue light into yellow light or orange light, or convert blue light into red light and/or green light. 
     The light conversion sheet  141  may include a yellow (YAG) phosphor that converts blue light to yellow light or orange light, or a red/green (RG) phosphor that converts blue light to red light and/or green light. For example, the light conversion sheet  141  may include a K2SiF6 (KSF) phosphor or a K2TiF6 (KTF) phosphor. 
     The diffusion sheet  142  may diffuse light to improve uniformity of light transmitted through the light conversion sheet  141 . 
     The prism sheet  143  may deflect the light, which passes through the diffusion sheet  142 , to be directed to the front of the light source apparatus  100  (for example, a normal direction of a plane defined by the light source apparatus). For example, light may be diffused in the diffusion sheet  142 , and the light may be emitted in an oblique direction from the diffusion sheet  142 . By using refraction of light, the prism sheet  143  may deflect light in a normal direction of a plane defined by the prism sheet  143 . 
     The reflective polarizing sheet  144  may transmit a portion of the incident light and reflect other portion of the incident light. For example, the reflective polarizing sheet  144  may transmit P-polarized light and reflect S-polarized light. In general, because the polarizing sheet absorbs polarized light, the luminance of the light source apparatus may be lowered. On the other hand, the reflective polarizing sheet  144  reflects polarized light, and thus the reflected light may be recycled in the light source apparatus  100 . 
     The order of lamination of the optical sheet  140  is not limited to that shown in  FIG. 4 . For example, the optical sheet  140  may be laminated in such a way that the diffusion sheet  142 →the optical change sheet  141 →the prism sheet  143 →the reflective polarizing sheet  144  are sequentially laminated. Alternatively, the diffusion sheet  142 →the prism sheet  143 →the optical change sheet  141 →the reflective polarizing sheet  144  may be sequentially laminated. 
     In addition, the optical sheet  140  is not limited to the sheet or film illustrated in  FIG. 4 , and may include more various sheets or films, such as a protective sheet. 
       FIG. 7  is a view of a travel path of light in the light source apparatus according to an exemplary embodiment of the present disclosure.  FIG. 8  is a view of a travel path of light at a center portion and an edge portion of the light source apparatus according to an exemplary embodiment of the present disclosure.  FIG. 9  is a view of a light conversion patch arranged on the edge portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     Referring to  FIGS. 7 and 8 , the light source apparatus  100  may include the light source module  110 , the reflective sheet  120 , the diffuser plate  130 , and/or the optical sheet  140 . 
     The light source module  110  includes the plurality of point light sources  111 . Light emitted from the plurality of point light sources  111  may be converted into uniform light while being transmitted through the diffuser plate  130  and/or the optical sheet  140 . 
     For example, as shown in  FIG. 7 , light L 1  may be emitted from the light source  111 . Light L 1  may include blue light having a wavelength of approximately 450 nm and 495 nm. 
     The light L 1  may be transmitted through the diffuser plate  130  and incident on the optical sheet  140 . The light L 1  may be transmitted through the optical sheet  140  or may be reflected from the optical sheet  140 . In addition, although not shown in the drawings, a portion of the light L 1  may be absorbed by the diffuser plate  130  and/or the optical sheet  140 . The absorbed light may be converted into heat in the diffuser plate  130  and/or the optical sheet  140 . 
     A portion of the light L 1 , which is light L 2 , may be transmitted through the optical sheet  140  and then be emitted to the outside of the light source apparatus  100 . Particularly, the light L 2  emitted from the light source apparatus  100  may be transmitted through the light conversion sheet  141  included in the optical sheet  140 . A wavelength of a portion of the light  2  may be changed while being transmitted through the light conversion sheet  141 . 
     For example, a portion of the blue light contained in the light may be transmitted through the light conversion sheet  141 , and another portion of the blue light may be changed to red light and/or green light by the light conversion sheet  141 . Accordingly, a ratio of blue light of light transmitted through the optical sheet  140  may be reduced, and a ratio of red light and/or green light may be increased. 
     A portion of the light L 1 , which is light L 3 , may be reflected by the optical sheet  140 . For example, the light L 3  may be reflected by the reflective polarizing sheet  144 . Accordingly, a portion of the light may be reflected by the reflective polarizing sheet  144 , and thus the light absorbed by the polarizing sheets  21  and  29  of the liquid crystal panel  20  may be reduced, thereby increasing the light recycling efficiency of the display apparatus  1  and thereby improving the luminance of the display apparatus  1 . 
     In addition, the light L 3  reflected from the reflective polarizing sheet  144  may be transmitted through the light conversion sheet  141 . For example, the light may be transmitted through the light conversion sheet  141  before and after being reflected by the reflective polarizing sheet  144 , respectively. Accordingly, the ratio of blue light of the light L 3  reflected from the reflective polarizing sheet  144  may be further reduced, and the ratio of red light and/or green light may be further increased. 
     The light L 3  may be moved toward the reflective sheet  120 , and reflected by the reflective sheet  120 . 
     Light L 4  reflected from the reflective sheet  120  may be again transmitted through the diffuser plate  130  and incident on the optical sheet  140 . The light L 4  may be transmitted through the optical sheet  140  or may be reflected from the optical sheet  140 . 
     A portion of the light L 4 , which is light L 5 , may be transmitted through the optical sheet  140 , and emitted to the outside of the light source apparatus  100 . The light L 5  may be transmitted through the light conversion sheet  141  included in the optical sheet  140 . The ratio of blue light of the light L 5  transmitted through the light conversion sheet  141  may be further reduced, and the ratio of red light and/or green light may be further increased. 
     When the light is reflected by the reflective polarizing sheet  144  and the reflective sheet  120 , the light may be transmitted through the light conversion sheet  141  several times, and thus the blue light may be converted into the red light and/or the green light. Therefore, the ratio of blue light, in the light L 5  having been reflected a large number of times between the reflective polarizing sheet  144  and the reflective sheet  120 , may be less than the ratio of blue light in the light  2  having been reflected a small number of times between the reflective polarizing sheet  144  and the reflective sheet  120 . In addition, a ratio of red light and/or green light of the light L 5  may be greater than a ratio of red light and/or green light of the light L 2 . 
     In other words, the light L 2  having been reflected a small number of times is bluish in comparison with the light L 5  having a large number of times, and the light L 5  is yellowish in comparison with the light L 2 . The light L 2  and the light L 5  may be mixed with each other and the light source apparatus  100  may emit white light in which the light L 2  and the light L 5  are mixed. In addition, the white light emitted from the light source apparatus  100  may be incident on the liquid crystal panel  20 . 
     At this time, a mixing ratio of the bluish light L 2  and the yellowish light  5  may vary according to a position of the light source apparatus  100 . 
     For example, as shown in  FIG. 8 , in various positions P 1  and P 2  of the light source apparatus  100 , the bluish light L 2  and the yellowish light L 5  may be mixed and the mixed light may be emitted from the light source apparatus  100 . 
     Light emitted from a first position P 1  of a central portion of the light source apparatus  100  may include the light L 2  emitted from the light source  111  (where the number of times transmitted through the light conversion sheet is small), the light L 5  reflected by the left reflective sheet  120  (where the number of times transmitted through the light conversion sheet is large), and the light L 5  reflected by the right reflective sheet  120  of the light source  111  (where the number of times transmitted through the light conversion sheet is large). 
     Light emitted from a second position P 2  of an edge portion of the light source apparatus  100  may include the light L 2  emitted from the light source  111  (where the number of times transmitted through the light conversion sheet is small), and the light L 5  reflected by the right reflective sheet  120  of the light source  111  (where the number of times transmitted through the light conversion sheet is large). 
     Therefore, a ratio of bluish light contained in the light emitted from the first position P 1  may be less than a ratio of bluish light contained in the light emitted from the second position P 2 . In other words, the light emitted from the edge portion of the light source apparatus  100  is more bluish than the light emitted from the central portion of the light source apparatus  100 . 
     A user can relatively easily visually recognize a slight color difference between different locations on the same display apparatus  1 . In other words, the edge portion of the light source apparatus  100  is more bluish than the center portion of the light source apparatus  100 , that is, an optical defect can be easily recognized by a user. 
     For example, when a blue (or green) image, such as an image of the sky or an image of a sports game (for example, golf) is displayed across the screen  12 , a user can easily recognize the optical defect at the edge portion of the display apparatus  1 . 
     As another example, when a white image is displayed across the screen  12 , such as a snowy snow scene image, a user can easily recognize the optical defect at the edge portion of the display apparatus  1  as well. 
     In order to prevent or suppress the optical defects at the edge portion of the display apparatus  1 , a light conversion patch  200  including at least one of a yellow fluorescent material, a red/green fluorescent material, a yellow pigment, a red/green pigment, a yellow dye, a red/green dye, or a red/green quantum dot material may be applied, printed or coated on the edge portion of the light source apparatus  100 , as shown in  FIG. 9 . 
     For example, on the edge portion of the reflective sheet  120 , the light conversion patch  200  may be applied, printed, or coated. The reflective sheet  120  may be divided into a first region representing an edge portion and a second region representing a central portion. The light conversion patch  200  may be applied, printed, or coated on the first region of the reflective sheet  120 , and the light conversion patch  200  may not be applied, printed, or coated on the second region of the reflective sheet  120 . 
     As another example, on the edge portion of the substrate  112 , the light conversion patch  200  may be applied, printed, or coated. The substrate  112  may be divided into a first region representing an edge portion and a second region representing a central portion. The light conversion patch  200  may be applied, printed, or coated on the first region of the substrate  112 , and the light conversion patch  200  may not be applied, printed, or coated on the second region of the substrate  112 . 
     The light conversion patch  200  may absorb a portion of blue light among incident light, and may convert a portion of the absorbed blue light into yellow light, red light, or green light. In addition, the light conversion patch  200  may absorb blue light among incident light and may reflect yellow light, red light, or green light. 
     Accordingly, the ratio of blue light of the light, which is transmitted through the light conversion patch  200 , may be reduced, and the ratio of yellow light, red light, or green light of the light may be increased. 
     As mentioned above, the light emitted from the second position P 2  of the edge portion of the light source apparatus  100  may include the light L 2  emitted from the light source  111  (where the number of times transmitted through the light conversion sheet is small), and the light L 5  reflected by the right reflective sheet  120  of the light source  111 . 
     The light conversion patch  200  may be applied, printed, or coated on the edge portion of the reflective sheet  120 . During the light L 5  is reflected from the edge portion of the reflective sheet  120 , a portion of blue light included in the light L 5  may be converted into yellow light, red light, or green light by the light conversion patch  200 . Accordingly, the ratio of blue light in the light L 5  may be reduced, and the ratio of yellow light may be increased. In other words, the light L 5  may be more yellowish. 
     Accordingly, the ratio of bluish light included in the light emitted from the second position P 2  may be reduced, and the light emitted from the edge portion of the light source apparatus  100  may be less bluish. Further, a difference between the ratio of blue light at the edge portion of the light source apparatus  100  and the ratio of blue light at the center portion of the light source apparatus  100  may be reduced to an extent that the user cannot recognize. 
     The light conversion patch  200  in the various types or in the various pattern may be applied, printed or coated on the edge portion of the reflective sheet  120  or the edge portion of the substrate  112 . 
     For example, the light conversion patch  200  may be applied, printed or coated on the edge portion of the reflective sheet  120  to surround the through-holes  120   a , as shown in  FIG. 9 . 
     As mentioned above, the reflective sheet  120  may be divided into the first region representing the edge portion and the second region representing the central portion. In the first region of the reflective sheet  120 , a through hole, around which the light conversion patch  200  is applied, printed or coated, may be disposed. In the second region of the reflective sheet  120 , a through hole, around which the light conversion patch  200  is not applied, printed or coated, may be disposed. 
     However, the type or pattern of the light conversion patch  200  as shown in  FIG. 9  is only an example of applying, printing or coating the light conversion patch  200 , and thus the type or pattern of the light conversion patch  200  is not limited thereto. 
     The light conversion patch  200  may be applied, printed, or coated to surround the light source  111  on the edge portion of the substrate  112 . The light conversion patch  200  arranged on the edge portion of the substrate  112  may be exposed through the through hole  120   a.    
     Hereinafter various types or patterns in which the light conversion patch  200  is applied, printed or coated on the edge portion of the light source apparatus  100  will be described. 
       FIG. 10  is a view of an example of an arrangement of the light conversion patch of left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 10 , the through hole  120   a , through which the light from the plurality of light sources  111  passes, is formed on the reflective sheet  120 . Further, on the edge portion of the reflective sheet  120 , the light conversion patch  200  may be applied, printed or coated (hereinafter referred to as “arranged”). 
     The light conversion patch  200  may include a light conversion material that absorbs a portion of blue light among incident light and converts a portion of the absorbed blue light into yellow light, red light, or green light. For example, the light conversion patch  200  may include at least one of a yellow fluorescent material, a red fluorescent material, a green fluorescent material, a red quantum dot material, or a green quantum dot material. 
     In addition, the light conversion patch  200  may include a light conversion material that absorbs a portion of blue light and reflects yellow light, red light, or green light among incident light. For example, the light conversion patch  200  may include at least one of a yellow pigment, a red pigment, a green pigment, a yellow dye, a red dye, or a green dye. 
     The light conversion patch  200  may be approximately circular or elliptical. In addition, on the edge portion of the reflective sheet  120 , the light conversion patch  200  may be arranged around the through holes  120   a  to surround the through holes  120   a.    
     The light conversion patch  200  may include a plurality of first light conversion patches  210  arranged around a first through hole  121  disposed in a first column in left and right edges  120   b  of the reflective sheet  120 . 
     A size and/or number of the first light conversion patch  210  may depend on the arrangement and size of the through-holes  120   a . In response to an increase in the distance between the through holes  120   a  and an increase in the size of the through holes  120   a , the size of the first light conversion patches  210  may be increased or the number of first light conversion patches  210  may be increased. 
     For example, when the distance between the centers of the through-holes  120   a  is approximately 11.0 mm and the diameter of the through-holes  120   a  is approximately 4.5 mm, eight first light conversion patches  210  may be arranged around the first through-hole  121 . Each of the eight first light conversion patches  210  may have a diameter of approximately 1.0 mm to 2.0 mm. The diameter of each of the first light conversion patches  210  may approximately 1.5 mm, and the diameter thereof may have an error margin of ±20%. In addition, according to an exemplary embodiment, the diameter of each of the first light conversion patches  210  may be approximately 1.3 mm or 1.1 mm. 
     The plurality of first light conversion patches  210  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the first through hole  121 . In addition, the plurality of first light conversion patches  210  may be arranged at approximately equal angular intervals with respect to a virtual central point in the first through hole  121 . For example, the eight first light conversion patches  210  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the first through hole  121 . 
     The light conversion patch  200  may include a plurality of second light conversion patches  220  arranged around a second through hole  122  disposed in a second column in the left and right edges  120   b  of the reflective sheet  120 . 
     A size and/or number of the second light conversion patches  220  may depend on the arrangement and size of the through-holes  120   a . For example, when the distance between the centers of the through-holes  120   a  is approximately 11.0 mm and the diameter of the through-holes  120   a  is approximately 4.5 mm, four second light conversion patches  220  may be arranged around the second through-hole  122 . Each of the four second light conversion patches  220  may have a diameter of approximately 0.8 mm to 1.5 mm. The diameter of each of the second light conversion patches  220  may approximately 1.3 mm, and the diameter thereof may have an error margin of ±20%. In addition, according to an exemplary embodiment, the diameter of each of the second light conversion patches  220  may be approximately 1.2 mm, 1.1 mm, or 0.9 mm. 
     The plurality of second light conversion patches  220  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the second through hole  122 . In addition, the plurality of second light conversion patches  220  may be arranged at approximately equal angular intervals with respect to a virtual central point in the second through hole  122 . For example, the four second light conversion patches  220  may be arranged at an angular interval of approximately 90 degrees with respect to the virtual central point in the second through hole  122 . 
     The light conversion patch  200  may include a plurality of third light conversion patches  230  arranged around a third through hole  123  disposed in a third column in the left and right edges of the reflective sheet  120 . 
     A size and/or number of the third light conversion patches  230  may depend on the arrangement and size of the through-holes  120   a . For example, when the distance between the centers of the through-holes  120   a  is approximately 11.0 mm and the diameter of the through-holes  120   a  is approximately 4.5 mm, three third light conversion patches  230  may be arranged around the third through-hole  123 . Each of the three third light conversion patches  230  may have a diameter of approximately 0.6 mm to 1.3 mm. The diameter of each of the third light conversion patches  230  may approximately 1.1 mm, and the diameter thereof may have an error margin of ±20%. In addition, according to an exemplary embodiment, the diameter of each of the third light conversion patches  230  may be approximately 0.9 mm or 0.7 mm. 
     The plurality of third light conversion patches  230  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the third through hole  123 . For example, the three third light conversion patches  230  may be arranged at an angular interval of approximately 45 degrees or 90 degrees with respect to the virtual central point in the third through hole  123 . 
     The diameters of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  may be variously combined. For example, the diameter of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  may be approximately 1.5 mm, approximately 1.3 mm, and approximately 1.1 mm, respectively. As another example, the diameter of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  may be approximately 1.3 mm, approximately 1.2 mm, and approximately 1.1 mm, respectively. As another example, the diameter of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  may be approximately 1.3 mm, approximately 1.1 mm, and approximately 0.9 mm, respectively. As another example, the diameter of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  may be approximately 1.1 mm, approximately 0.9 mm, and approximately 0.7 mm, respectively. 
     The light conversion patch  200  may not be only arranged around the through holes  120   a  of the edge portion of the reflective sheet  120 , but also arranged between the through holes  120   a  and the through holes  120   a  of the edge portion of the reflective sheet  120 . 
     For example, between the first through hole  121  of the reflective sheet  120  and the second through hole  122  of the reflective sheet  120 , three light conversion patches may be arranged. A diameter of the light conversion patch arranged between the first through hole  121  and the second through hole  122  may be between approximately 1.0 mm to 2.0 mm, and appropriately 1.5 mm. 
     Between the second through hole  122  of the reflective sheet  120  and the third through hole  123  of the reflective sheet  120 , three light conversion patches may be arranged. A diameter of the light conversion patch arranged between the second through hole  122  and the third through hole  123  may be between approximately 0.8 mm to 1.5 mm, and appropriately 1.3 mm. 
     Three light conversion patches may be arranged on an inside of the third through hole  123  of the reflective sheet  120 . A diameter of the light conversion patch arranged inside the third through hole  123  may be between approximately 0.5 mm and 1.1 mm, and appropriately approximately 0.9 mm. 
     As described above, at the right and left edge portions of the reflective sheet  120 , the first light conversion patch  210 , the second light conversion patches  220  and/or the third light conversion patch  230  may be arranged. 
     The size of each of the first light conversion patches  210  arranged at the outermost side of the left and right edge portions of the reflective sheet  120  is greater than the size of each of the second light conversion patches  220  arranged more inside than the first light conversion patches  210 . The distance between the first light conversion patches  210  is less than the distance between the second light conversion patches  220 . Further, the number of the first light conversion patches  210  is greater than the number of the second light conversion patches  220 . 
     The size of each of the second light conversion patches  220  is greater than the size of each of the third light conversion patches  230  arranged further inside than the second light conversion patches  220 . The distance between the second light conversion patches  220  is less than the distance between the third light conversion patches  230 . Further, the number of the second light conversion patches  220  is greater than the number of the third light conversion patches  230 . 
     As mentioned above, as the distance from the left and right edges  120   b  of the reflective sheet  120  to the light conversion patch  200  is increased, the size of the light conversion patch  200  may be reduced, the distance between the light conversion patches  200  may be increased, and the number of light conversion patches  200  may be reduced. In addition, as the distance from the left and right edges  120   b  of the reflective sheet  120  to the light conversion patch  200  is increased, a ratio of an area occupied by the light conversion patch  200  may be reduced. 
     Accordingly, when the light is reflected by the edge portion of the reflective sheet  120 , the ratio of blue light contained in the light may be reduced, and the ratio of yellow light may be further increased. It is possible to relieve a difficulty in which an amount of light L 5 , which has the large number of times transmitted through the light conversion sheet, in the edge portion of the light source apparatus  100  is less than an amount of light L 5  in the central portion of the light source apparatus  100 . Further, a defect, in which the edge portion of the light source apparatus  100  is more bluish than the central portion of the light source apparatus  100  may be eliminated. 
       FIG. 11  is a view of an example of an arrangement of the light conversion patch of a corner portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
       FIG. 10  illustrates the arrangement of the light conversion patch  200  at the left and right edges of the light source apparatus  100 , but the light conversion patch  200  may be also arranged at upper and lower edges of the light source apparatus  100 . Further, the light conversion patch  200  may be arranged at a corner portion of the light source apparatus  100 . 
     As illustrated in  FIG. 11 , on the reflective sheet  120 , the plurality of through-holes  120   a  is formed. In addition, the light conversion patch  200  may be applied, printed, or coated on the left and right edge portions, upper and lower edge portions, and corner portions of the reflective sheet  120 . The light conversion patch  200  may be the same as the light conversion patch  200  described in  FIG. 10 . 
     The light conversion patch  200  may include first light conversion patches  210  arranged around the first through hole  121  in the left and right edge portions of the reflective sheet  120 , second light conversion patches  220  arranged around the second through hole  122 , and third light conversion patches  230  arranged around the third through hole  123 . 
     A description of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  will be replaced with the description of the first light conversion patches  210 , the second light conversion patches  220 , and the third light conversion patches  230  described with reference to  FIG. 10 . 
     The light conversion patch  200  may include a plurality of fourth light conversion patches  240  arranged around a fourth through hole  124  disposed in a first row from the upper and lower edges  120   c  of the reflective sheet  120 . For example, eight fourth light conversion patches  240  may be arranged around the fourth through-hole  124 . Each of the eight fourth light conversion patches  240  may have a diameter of approximately 1.1 mm to 2.1 mm. The diameter of each of the eight fourth light conversion patches  240  may appropriately be 1.6 mm, and the diameter thereof may have an error margin of ±20%. 
     The plurality of fourth light conversion patches  240  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the fourth through hole  124 . In addition, the plurality of fourth light conversion patches  240  may be arranged at approximately equal angular intervals with respect to a virtual central point in the fourth through hole  124 . For example, the eight fourth light conversion patches  240  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the fourth through hole  124 . 
     The light conversion patch  200  may include a plurality of fifth light conversion patches  250  arranged around a fifth through hole  125  disposed in a second row from the upper and lower edges  120   c  of the reflective sheet  120 . For example, four fifth light conversion patches  250  may be arranged around the fifth through hole  125 . Each of the four fifth light conversion patches  250  may have a diameter of approximately 0.9 mm to 1.6 mm. The diameter of each of the fifth light conversion patches  250  may appropriately be 1.4 mm, and the diameter thereof may have an error margin of ±20%. 
     The plurality of fifth light conversion patches  250  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the fifth through hole  125 . In addition, the plurality of fifth light conversion patches  250  may be arranged at approximately equal angular intervals with respect to a virtual central point in the fifth through hole  125 . For example, the four fifth light conversion patches  250  may be arranged at an angular interval of approximately 90 degrees with respect to the virtual central point in the fifth through hole  125 . 
     The light conversion patch  200  may include a plurality of sixth light conversion patches  260  arranged around a sixth through hole  126  disposed in a third row from the upper and lower edge portion of the reflective sheet  120 . For example, three sixth light conversion patches  260  may be arranged around the sixth through hole  126 . Each of the three sixth light conversion patches  260  may have a diameter of approximately 0.7 mm to 1.4 mm. The diameter of each of the sixth light conversion patches  260  may appropriately be 1.2 mm, and the diameter thereof may have an error margin of ±20%. 
     The plurality of sixth light conversion patches  260  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the sixth through hole  126 . For example, the three sixth light conversion patches  260  may be arranged at an angular interval of approximately 45 degrees or approximately 90 degrees with respect to the virtual central point in the sixth through hole  126 . 
     In addition, a seventh through hole  127  is arranged at the corner portion of the reflective sheet  120 , and the seventh through hole  127  is arranged closest to the corner of the reflective sheet  120 . In other words, a distance between the corner of the reflective sheet  120  and the seventh through hole  127  may be minimized such that the distance between the corner of the reflective sheet  120  and the seventh through hole is less than the distance between the corner of the reflection sheet  120  and the other through holes. A plurality of seventh light conversion patches  270  may be arranged around the seventh through hole  127 . For example, eight seventh light conversion patches  270  may be arranged around the seventh through hole  127 . Each of the eight seventh light conversion patches  270  may have a diameter of approximately 1.5 mm to 2.5 mm. The diameter of each of the seventh light conversion patches  270  may appropriately be 2.0 mm, and the diameter thereof may have an error margin of ±20%. 
     The plurality of seventh light conversion patches  270  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the seventh through hole  127 . In addition, the plurality of seventh light conversion patches  270  may be arranged at approximately equal angular intervals with respect to a virtual central point in the seventh through hole  127 . For example, the eight seventh light conversion patches  270  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the seventh through hole  127 . 
     As described above, in the upper and lower edge portions of the reflective sheet  120 , the fourth light conversion patches  240 , the fifth light conversion patches  250 , and/or the sixth light conversion patches  260  may be arranged. 
     The size of each of the fourth light conversion patches  240  arranged at the outermost side of the upper and lower edge portions of the reflective sheet  120  is greater than the size of each of the fifth and sixth light conversion patches  250  and  260  arranged more inside than the first light conversion patches  210 . The distance between the fourth light conversion patches  240  is less than the distance between the fifth and sixth light conversion patches  250  and  260 . Further, the number of the fourth light conversion patches  240  is greater than the number of the fifth and sixth light conversion patches  250  and  260 . 
     As mentioned above, as the distance from the upper and lower edges  120   c  of the reflective sheet  120  to the light conversion patch  200  is increased, the size of the light conversion patch  200  may be reduced, the distance between the light conversion patches  200  may be increased, and the number of light conversion patches  200  may be reduced. In addition, a ratio of an area occupied by the light conversion patch  200  may be reduced as the distance from outermost side of the upper and lower edge portions towards the center portion of the reflective sheet  120  is increased. 
     The size of the light conversion patches  240 ,  250 , and  260  arranged on the upper and lower edge portions of the reflective sheet  120  may be different from the size of the light conversion patches  210 ,  220 , and  230  arranged on the left and right edge portions of the reflective sheet  120 . For example, the diameter of each of the fourth light conversion patches  240  arranged at the outermost side of the upper and lower edge portions of the reflective sheet  120  may be greater than the diameter of each of the first light conversion patches  210  arranged at the outermost side of the left and right edge portions of the reflective sheet  120 . Further, the diameter of each of the fifth and sixth light conversion patches  250  and  260  arranged at the inner side of the outermost side of the upper and lower edge portions of the reflective sheet  120  may be greater than the diameter of each of the second and third light conversion patches  220  and  230  arranged at the inner side of the outermost side of the left and right edge portions of the reflective sheet  120 . 
     The seventh light conversion patch  270  may be arranged at the corner portion of the reflective sheet  120 . 
     The size of the seventh light conversion patches  270  arranged at the corner portions of the reflective sheet  120  may be different from the size of the light conversion patches  210 ,  220 ,  230 ,  240 ,  250 , and  260  arranged at the left and right/upper and lower portion of the reflective sheet  120 . For example, the diameter of the seventh light conversion patches  270  may be greater than the diameter of the first and fourth light conversion patches  210  and  240  arranged at the outermost side of the left and right/upper and lower portion of the reflective sheet  120 . 
     Accordingly, when the light is reflected by the corner portion of the reflective sheet  120 , the ratio of blue light contained in the light may be reduced, and the ratio of yellow light may be further increased. It is possible to relieve a defect in which an amount of light L 5 , which has the large number of times transmitted through the light conversion sheet, in the corner portion of the light source apparatus  100  is less than an amount of light L 5  in the central portion of the light source apparatus  100 . Further, a defect (e.g., optical defect), in which the corner portion of the light source apparatus  100  is more bluish than the central portion of the light source apparatus  100  may be eliminated. 
     In the above description, the size of the light conversion patches arranged at the outermost side of the left and right/upper and lower edge portions of the reflective sheet  120  is different from the size of the light conversion patches arranged at the inner side of the outermost side, and the distance between the light conversion patches arranged at the outermost side of the left and right/upper and lower edge portions of the reflective sheet  120  is different from the distance between the light conversion patches arranged at the inner side of the outermost side. However, the arrangement of the light conversion patches is not limited to thereto. 
       FIG. 12  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 12 , a light conversion patch  200  may be arranged around the through hole  120   a  at the edge portion of the reflective sheet  120 . The light conversion patch  200  may be the same as the light conversion patch described with reference to  FIG. 10 . 
     The light conversion patch  200  may include a plurality of first light conversion patches  210  arranged around a first through hole  121  disposed in a first column in left and right edges  120   b  of the reflective sheet  120 . The size, arrangement, and number of the first light conversion patches  210  may be the same as the first light conversion patches  210  shown in  FIG. 10 . For example, the eight first light conversion patches  210  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the first through hole  121 . 
     The light conversion patch  200  may include a plurality of second light conversion patches  220  arranged around a second through hole  122  disposed in a second column in the left and right edges  120   b  of the reflective sheet  120 . 
     Unlike the second light conversion patches  220  shown in  FIG. 10 , the size of the second light conversion patches  220  shown in  FIG. 12  may be approximately equal to the size of the first light conversion patches  210 . In other words, the diameter of the second light conversion patches  220  may be approximately equal to the diameter of the first light conversion patches  210 . For example, the diameter of the first light conversion patches  210  may be approximately 1.5 mm, and the diameter of the second light conversion patches  220  may also be approximately 1.5 mm. 
     The plurality of second light conversion patches  220  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the second through hole  122 , and the number of the second light conversion patches  220  may be the same as the number of the first light conversion patches  210 . For example, the eight second light conversion patches  220  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the second through hole  122 . 
     The light conversion patch  200  may include a plurality of third light conversion patches  230  arranged around a third through hole  123  disposed in a third column in the left and right edges  120   b  of the reflective sheet  120 . 
     Unlike the third light conversion patches  230  shown in  FIG. 10 , the size of the third light conversion patches  230  shown in  FIG. 12  may be approximately equal to the size of the first light conversion patches  210 . In other words, the diameter of the third light conversion patches  230  may be approximately equal to the diameter of the first light conversion patches  210 . For example, based on the diameter of the first light conversion patches  210  may be approximately 1.5 mm, and the diameter of the third light conversion patches  230  may also be approximately 1.5 mm. 
     The plurality of third light conversion patches  230  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the third through hole  123 , and the number of the third light conversion patches  230  may be the same as the number of the first light conversion patches  210 . For example, the eight third light conversion patches  230  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the third through hole  123 . 
     Although not shown in  FIG. 12 , the light conversion patch  200  may include a plurality of fourth light conversion patches arranged around a fourth through hole disposed in a first row in the upper and lower edges  120   c  of the reflective sheet  120 , a plurality of fifth light conversion patches arranged around a fifth through hole disposed in a second row, or a plurality of sixth light conversion patches arranged around a sixth through hole disposed in a third row. 
     The size of the fourth, fifth, and sixth light conversion patches may be the same as the size of the first light conversion patches  210 , and the number of the fourth, fifth, and sixth light conversion patches may be the same as the number of the first light conversion patches  210 . 
     The light conversion patch  200  may include a plurality of seventh light conversion patches arranged around a seventh through hole disposed at the corner portion of the reflective sheet, and the size, number, and arrangement of the seventh light conversion patches may be the same as the size, number, and arrangement of the first light conversion patches  210 . 
     Further, unlike that illustrated in  FIG. 12 , the second light conversion patches  220  may be omitted, or the third light conversion patches  230  may be omitted, or the second and third light conversion patches  220  and  230  may be omitted. In other words, the light conversion patch  200  may include only the first light conversion patches  210 , or may include the first and second light conversion patches  210  and  220 , or may include the first and third light conversion patches  210  and  230 . 
       FIG. 13  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 13 , a light conversion patch  200  may be arranged around the through hole  120   a  at the edge portion of the reflective sheet  120 . The light conversion patch  200  may be the same as the light conversion patch described with reference to  FIG. 10 . 
     The light conversion patch  200  may include a plurality of first light conversion patches  210  arranged around a first through hole  121  disposed in a first column from left and right edges  120   b  of the reflective sheet  120 . The size, arrangement, and number of the first light conversion patches  210  may be the same as the first light conversion patches  210  shown in  FIG. 10 . For example, the eight first light conversion patches  210  may be arranged at an angular interval of approximately 45 degrees with respect to a virtual central point in the first through hole  121 . 
     The light conversion patch  200  may include a plurality of second light conversion patches  220  arranged around a second through hole  122  disposed in a second column from the left and right edges  120   b  of the reflective sheet  120 . 
     Unlike the second light conversion patches  220  shown in  FIG. 10 , the size of the second light conversion patches  220  shown in  FIG. 13  may be approximately equal to the size of the first light conversion patches  210 . For example, the diameter of the first light conversion patches  210  may be approximately 1.5 mm, and the diameter of the second light conversion patches  220  may also be approximately 1.5 mm. 
     The number of the second light conversion patches  220  may be less than the number of the first light conversion patches  210 , and the plurality of second light conversion patches  220  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the second through hole  122 . For example, the eight second light conversion patches  220  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the second through hole  122 . 
     The light conversion patch  200  may include a plurality of third light conversion patches  230  arranged around a third through hole  123  disposed in a third column from the left and right edges  120   b  of the reflective sheet  120 . 
     Unlike the third light conversion patches  230  shown in  FIG. 10 , the size of the third light conversion patches  230  shown in  FIG. 13  may be approximately equal to the size of the first light conversion patches  210 . For example, the diameter of the first light conversion patches  210  may be approximately 1.5 mm, and the diameter of the third light conversion patches  230  may also be approximately 1.5 mm. 
     The number of the third light conversion patches  230  may be less than the number of the second light conversion patches  220 , and the plurality of third light conversion patches  230  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the third through hole  123 . For example, the three third light conversion patches  230  may be arranged at an angular interval of approximately 90 degrees or approximately 180 degrees with respect to the virtual central point in the third through hole  123 . 
     Although not shown in  FIG. 13 , the light conversion patch  200  may include a plurality of fourth light conversion patches, a plurality of fifth light conversion patches or a plurality of sixth light conversion patches. 
     The size of the fourth, fifth, and sixth light conversion patches may be the same as the size of the first light conversion patches  210 . 
     The number and arrangement of the fourth light conversion patches may be the same as the number and arrangement of the first light conversion patches  210 . The number and arrangement of the fifth light conversion patches may be the same as the number and arrangement of the second light conversion patches  220 . The number and arrangement of the sixth light conversion patches may be the same as the number and arrangement of the fifth light conversion patches  250 . 
     The light conversion patch  200  may include a plurality of seventh light conversion patches arranged around a seventh through hole disposed at the corner portion of the reflective sheet, and the size, number, and arrangement of the seventh light conversion patches may be the same as the size, number, and arrangement of the first light conversion patches  210 . 
       FIG. 14  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 14 , a light conversion patch  200  may be arranged around the through hole  120   a  at the edge portion of the reflective sheet  120 . The light conversion patch  200  may be the same as the light conversion patch described with reference to  FIG. 10 . 
     The light conversion patch  200  may include a plurality of first light conversion patches  210  arranged around a first through hole  121  disposed in a first column from left and right edges  120   b  of the reflective sheet  120 . The size, arrangement, and number of the first light conversion patches  210  may be the same as the first light conversion patches  210  shown in  FIG. 10 . For example, the eight first light conversion patches  210  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the first through hole  121 . 
     The light conversion patch  200  may include a plurality of second light conversion patches  220  arranged around a second through hole  122  disposed in a second column from the left and right edges  120   b  of the reflective sheet  120 . 
     The size of the second light conversion patches  220  may be less than the size of the first light conversion patches  210 . For example, based on the diameter of the first light conversion patches  210  being approximately 1.5 mm, the diameter of the second light conversion patches  220  may also be approximately 1.3 mm. 
     Unlike the second light conversion patches  220  shown in  FIG. 10 , the number of the second light conversion patches  220  shown in  FIG. 14  may be the same as the number of the first light conversion patches  210 . The plurality of second light conversion patches  220  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the second through hole  122 . For example, the eight second light conversion patches  220  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the second through hole  122 . 
     The light conversion patch  200  may include a plurality of third light conversion patches  230  arranged around a third through hole  123  disposed in a third column from the left and right edges  120   b  of the reflective sheet  120 . 
     The size of the third light conversion patches  230  may be less than the size of the second light conversion patches  220 . For example, the diameter of the second light conversion patches  220  may be approximately 1.3 mm, and the diameter of the third light conversion patches  230  may also be approximately 1.1 mm. 
     Unlike the third light conversion patches  230  shown in  FIG. 10 , the number of the third light conversion patches  230  shown in  FIG. 14  may be the same as the number of the first and second light conversion patches  210  and  220 . The plurality of third light conversion patches  230  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the third through hole  123 . For example, the eight third light conversion patches  230  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the third through hole  123 . 
     Although not shown in  FIG. 14 , the light conversion patch  200  may include a plurality of fourth light conversion patches, a plurality of fifth light conversion patches or a plurality of sixth light conversion patches. 
     The size of the fourth light conversion patches may be the same as the size of the first light conversion patches  210 , the size of the fifth light conversion patches may be the same as the size of the second light conversion patches  220 , and the size of the sixth light conversion patches may be the same as the size of the fifth light conversion patches  250 . 
     The number and arrangement of the fourth, fifth, and sixth light conversion patches may be the same as the number and arrangement of the first light conversion patch  210 . 
     The light conversion patch  200  may include a plurality of seventh light conversion patches arranged around a seventh through hole disposed at the corner portion of the reflective sheet, and the size, number, and arrangement of the seventh light conversion patches may be the same as the size, number, and arrangement of the first light conversion patches  210 . 
       FIG. 15  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 15 , a light conversion patch  200  may be arranged around a through hole at an edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may include a light conversion material that absorbs a portion of blue light among incident light and converts a portion of the absorbed blue light into yellow light, red light, or green light. In addition, the light conversion patch  200  may include a light conversion material that absorbs a portion of blue light and reflects yellow light, red light, or green light among incident light. 
     The light conversion patch  200  may be approximately a quadrangle. However, the shape of the light conversion patch  200  is not limited to a quadrangle, and thus the shape of the light conversion patch  200  may be a polygon including a triangle, a pentagon, or a hexagon. 
     The light conversion patch  200  may include a plurality of first light conversion patches  210  arranged around a first through hole  121  disposed in a first column from the left and right edges  120   b  of the reflective sheet  120 . The arrangement, and number of the first light conversion patches  210  may be the same as the first light conversion patches  210  shown in  FIG. 10 . For example, the eight first light conversion patches  210  may be arranged at an angular interval of approximately 45 degrees with respect to the virtual central point in the first through hole  121 . 
     Each of the first light conversion patches  210  may be a square having one side of approximately 1.5 mm. 
     The light conversion patch  200  may include a plurality of second light conversion patches  220  arranged around a second through hole  122  disposed in a second column in the left and right edges  120   b  of the reflective sheet  120 . 
     The size of the second light conversion patches  220  may be less than the size of the first light conversion patches  210 . For example, the second light conversion patches  220  may have a square shape including a side of approximately 1.3 mm. 
     The number of the second light conversion patches  220  may be less than the number of the first light conversion patches  210 , and the plurality of second light conversion patches  220  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the second through hole  122 . For example, the four second light conversion patches  220  may be arranged at an angular interval of approximately 90 degrees with respect to the virtual central point in the second through hole  122 . 
     The light conversion patch  200  may include a plurality of third light conversion patches  230  arranged around a third through hole  123  disposed in a third column from the left and right edges  120   b  of the reflective sheet  120 . 
     The size of the third light conversion patches  230  may be less than the size of the second light conversion patches  220 . For example, the third light conversion patches  230  may have a square shape including a side of approximately 1.1 mm. 
     The number of the third light conversion patches  230  may be less than the number of the second light conversion patches  220 , and the plurality of third light conversion patches  230  may be arranged at approximately equal intervals along a circumference of a virtual circle surrounding the second through hole  122 . For example, the three third light conversion patches  230  may be arranged at an angular interval of approximately 90 degrees or approximately 180 degrees with respect to the virtual central point in the third through hole  123 . 
     Although not shown in  FIG. 15 , the light conversion patch  200  may include a plurality of fourth light conversion patches, a plurality of fifth light conversion patches or a plurality of sixth light conversion patches. Each of the fourth, fifth, and sixth light conversion patches may be formed in a polygon shape including a quadrangle, a triangle, a pentagon, or a hexagon. 
     The size, number, and arrangement of the fourth light conversion patches may be the same as the size, number, and arrangement of the first light conversion patches  210 . The size, number, and arrangement of the fifth light conversion patches may be the same as the size, number, and arrangement of the second light conversion patches  220 . The size, number, and arrangement of the sixth light conversion patches may be the same as the size, number, and arrangement of the fifth light conversion patches  250 . 
     The light conversion patch  200  may include a plurality of seventh light conversion patches arranged around a seventh through hole disposed at the corner portion of the reflective sheet, and the size, number, and arrangement of the seventh light conversion patches may be the same as the size, number, and arrangement of the first light conversion patches  210 . 
       FIG. 16  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 16 , a light conversion patch  200  may be arranged around a through hole at an edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may include a light conversion material that absorbs a portion of blue light among incident light and converts a portion of the absorbed blue light into yellow light, red light, or green light. In addition, the light conversion patch  200  may include a light conversion material that absorbs a portion of blue light and reflects yellow light, red light, or green light among incident light. 
     The light conversion patch  200  may have a shape that approximately forms ring surrounding the through holes  120   a . In  FIG. 16 , the light conversion patch  200  having a substantially ring shape is illustrated, but is not limited thereto. For example, the light conversion patch  200  may be formed in various ring shapes surrounding the through holes, such as an oval ring, a square ring, a pentagonal ring, and a hexagonal ring. 
     The light conversion patch  200  may include a plurality of first light conversion bands  310  arranged around a first through hole  121  disposed in a first column from the left and right edges  120   b  of the reflective sheet  120 . For example, the first light conversion bands  310  may be formed in a ring shape having a width of approximately 1.5 mm. 
     The light conversion patch  200  may include a plurality of second light conversion bands  320  arranged around a second through hole  122  disposed in a second column from the left and right edges  120   b  of the reflective sheet  120 . The shape, size and number of the second light conversion bands  320  may be the same as the shape, size and number of the first light conversion bands  310 . For example, the second light conversion bands  320  may be formed in a ring shape having a width of approximately 1.5 mm. 
     The light conversion patch  200  may include a plurality of third light conversion bands  330  arranged around a third through hole  123  disposed in a third column from the left and right edges  120   b  of the reflective sheet  120 . The shape, size and number of the third light conversion bands  330  may be the same as the shape, size and number of the first light conversion bands  310 . For example, the third light conversion bands  330  may be formed in a ring shape having a width of approximately 1.5 mm. 
     Although not shown in  FIG. 16 , the light conversion patch  200  may further include a plurality of fourth light conversion bands surrounding a fourth through hole, a plurality of fifth light conversion bands surrounding a fifth through hole, a plurality of sixth light conversion bands surrounding a sixth through hole, or a plurality of seventh light conversion bands surrounding a seventh through hole. 
     In addition, unlike that shown in  FIG. 16 , the second light conversion bands  320  may be omitted, or the third light conversion bands  330  may be omitted, or the second and third light conversion bands  320  and  330  may be omitted. In other words, the light conversion patch  200  may include only the first light conversion bands  310 , may include the first and second light conversion bands  310  and  320 , or may include the first and third light conversion bands  310  and  330 . 
     During the light is reflected by the light conversion bands arranged at the edge portion of the reflective sheet  120 , the ratio of blue light contained in the light may be reduced, and the ratio of yellow light may be further increased. Further, a defect (e.g., optical defect), in which the edge portion of the light source apparatus  100  is more bluish than the central portion of the light source apparatus  100  may be eliminated. 
       FIG. 17  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 17 , a light conversion patch  200  including a light conversion material may be arranged around a through hole at an edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may include a plurality of first light conversion bands  310  arranged around a first through hole  121  disposed in a first column in left and right edges  120   b  of the reflective sheet  120 . For example, the first light conversion bands  310  may be formed in a ring shape having a width of approximately 1.5 mm. 
     The light conversion patch  200  may include a plurality of second light conversion bands  320  arranged around a second through hole  122  disposed in a second column in left and right edges  120   b  of the reflective sheet  120 . The size of the second light conversion bands  320  may be less than the size of the first light conversion bands  310 . For example, the second light conversion bands  320  may be formed in a ring shape having a width of approximately 1.3 mm. 
     The light conversion patch  200  may include a plurality of third light conversion bands  330  arranged around a third through hole  123  disposed in a third column in left and right edges  120   b  of the reflective sheet  120 . The size of the third light conversion bands  330  may be less than the size of the second light conversion bands  320 . For example, the third light conversion bands  330  may be formed in a ring shape having a width of approximately 1.1 mm. 
     As mentioned above, at the left and right edge portions of the reflective sheet  120 , the first light conversion bands  310 , the second light conversion bands  320  and/or the third light conversion bands  330  may be arranged. The width of the first light conversion bands  310  may be greater than the width of the second light conversion bands  320 , and the width of the second light conversion bands  320  may be greater than the width of the third light conversion bands  330 . 
     Although not shown in  FIG. 17 , the light conversion patch  300  may further include a plurality of fourth light conversion bands surrounding a fourth through hole, a plurality of fifth light conversion bands surrounding a fifth through hole, a plurality of sixth light conversion bands surrounding a sixth through hole, or a plurality of seventh light conversion bands surrounding a seventh through hole arranged at the corner of the reflective sheet  120 . The fourth light conversion bands may be the same as the first light conversion bands  310 , the fifth light conversion bands may be the same as the same as the second light conversion bands  320 , the sixth light conversion bands may be the same as the third light conversion bands  330 , and the seventh light conversion bands may be the same as the first light conversion bands  310 . 
     Accordingly, as the distance from the left and right edges  120   b  of the reflective sheet  120  to the light conversion patch  200  is increased, the size (width) of the light conversion patch  200  may be reduced. 
       FIG. 18  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 18 , a light conversion patch  200  including a light conversion material may be arranged around a through hole  120   a  at the edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may be formed in a substantially plurality of circumferential shapes surrounding the through holes  120   a . In  FIG. 18 , the light conversion patch  200  having a substantially circumferential shape is illustrated, but is not limited thereto. For example, the light conversion patch  200  may have various circumferential shapes surrounding through holes, such as an ellipse circumference, a square circumference, a pentagonal circumference, or a hexagonal circumference. 
     The light conversion patch  200  may include first light conversion lines surrounding a first through hole  121  disposed in a first column from the left and right edges  120   b  of the reflective sheet  120 . For example, the first light conversion lines may include three circumferences  311 ,  312 , and  313  surrounding the first through hole  121 . 
     The light conversion patch  200  may include second light conversion lines surrounding a second through hole  122  disposed in a second column in the left and right edges  120   b  of the reflective sheet  120 . The shape, size, and number of the second light conversion lines may be the same as the shape, size, and number of the first light conversion lines. For example, the second light conversion lines may include three circumferences  321 ,  322 , and  323  surrounding the second through hole  122 . 
     The light conversion patch  200  may include third light conversion lines surrounding a third through hole  123  disposed in a third column in the left and right edges  120   b  of the reflective sheet  120 . The shape, size, and number of the third light conversion lines may be the same as the shape, size, and number of the first light conversion lines. For example, the third light conversion lines may include three circumferences  331 ,  332 , and  333  surrounding the third through hole  123 . 
     Although not shown in  FIG. 18 , the light conversion patch  200  may further include a plurality of fourth light conversion lines surrounding a fourth through hole, a plurality of fifth light conversion lines surrounding a fifth through hole, a plurality of sixth light conversion lines surrounding a sixth through hole or a plurality of seventh light conversion lines surrounding a seventh through hole. 
     Unlike that shown in  FIG. 18 , the second light conversion lines may be omitted, or the third light conversion lines may be omitted, or the second and third light conversion lines may be omitted. In other words, the light conversion patch  200  may include only the first light conversion lines, or may include the first and second light conversion lines, or may include the first and third light conversion lines. 
     When the light is reflected by the light conversion lines arranged at the edge portion of the reflective sheet  120 , the ratio of blue light contained in the light may be reduced, and the ratio of yellow light may be further increased. Further, a defect (optical defect), in which the edge portion of the light source apparatus  100  is more bluish than the central portion of the light source apparatus  100  may be eliminated. 
       FIG. 19  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 19 , a light conversion patch  200  including a light conversion material may be arranged around a through hole  120   a  at the edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may include first light conversion lines surrounding a first through hole  121  disposed in a first column from the left and right edges  120   b  of the reflective sheet  120 . For example, the first light conversion lines may include three circumferences  311 ,  312 , and  313  surrounding the first through hole  121 . 
     The light conversion patch  200  may include second light conversion lines surrounding a second through hole  122  disposed in a second column from the left and right edges  120   b  of the reflective sheet  120 . The number of the second light conversion lines may be less than the number of the first light conversion lines. For example, the second light conversion lines may include two circumferences  321  and  322  surrounding the second through hole  122 . 
     The light conversion patch  200  may include third light conversion lines surrounding a third through hole  123  disposed in a third column from the left and right edges  120   b  of the reflective sheet  120 . The number of the third light conversion lines may be less than the number of the second light conversion lines. For example, the third light conversion lines may include a single circumference  331  surrounding the third through hole  123 . 
       FIG. 20  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 20 , a light conversion patch  200  including a light conversion material may be arranged around through holes  120   a  at the edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may include a light conversion region  410 , in which a light conversion material is dispersed, surrounding the through holes  120   a . For example, the light conversion region  410 , in which points including the light conversion material are distributed, may be arranged around the through holes  120   a.    
     The light conversion region  410  may be arranged around a first through hole  121  disposed in a first column at the left and right edges  120   b  of the reflective sheet  120 , around a second through hole  122  disposed in a second column from the left and right edges  120   b  of the reflective sheet  120 , and around a third through hole  123  disposed in a third column from the left and right edges  120   b  of the reflective sheet  120 . 
     In the light conversion region  410 , a density of points including the light conversion material may be constant. 
       FIG. 21  is a view of an example of the light conversion patch arranged on the left and right edge portions of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     As illustrated in  FIG. 21 , a light conversion patch  200  including a light conversion material may be arranged around through holes  120   a  at the edge portion of the reflective sheet  120 . 
     The light conversion patch  200  may include a light conversion region  420 , in which a light conversion material is dispersed, surrounding the through holes  120   a . For example, the light conversion region  420 , in which points including the light conversion material are distributed, may be arranged around the through holes  120   a.    
     The light conversion region  410  may be arranged around a first through hole  121 , a second through hole  122 , and a third through hole  123 . 
     In the light conversion region  410 , a density of points including the light conversion material may vary according to a distance from the left and right edges  120   b  of the reflective sheet  120 . For example, as the distance from the left and right edges  120   b  of the reflective sheet  120  is increased, the density of points including the light conversion material may be reduced. 
     In the above description, it has been described that the light conversion patch  200  is applied, printed or coated on the edge portion of the “reflective sheet  120 ”. However, the light conversion patch  200  may be applied, printed or coated on not only the “reflective sheet  120 ” but also other sheets or plates. 
       FIG. 22  is a view of an example of the light conversion patch arranged on the edge portion of the light source apparatus according to an exemplary embodiment of the present disclosure. 
     For example, a light conversion patch  200  may be applied, printed or coated on the edge portion of the substrate  112 . The light conversion patch  200  may include a plurality of light conversion patches arranged at approximately equal intervals along a circumference of a circle surrounding the light source  111  as shown in  FIG. 22 . 
     The light conversion patches surrounding the light source  111  may be exposed through the through hole  120   a  of the reflective sheet  120 . Accordingly, light emitted from the light source  111  may be reflected from the light conversion patch  200  coated, printed or coated on the substrate  112 . 
     The arrangement of the light conversion patch  200  is not limited to  FIG. 22 , and the light conversion patch  200  may be arranged along the circumference of the light source  111  on the substrate  112  as shown in  FIGS. 10 to 21 . 
     In addition, the light conversion patch  200  is not limited to being arranged on the reflective sheet  120  or the substrate  112 , and thus the light conversion patch  200  may be applied, printed, or coated on the edge portion of the diffuser plate  130 , the diffusion sheet  142 , the prism sheet  143 , the light conversion sheet  141  or the reflective polarizing sheet  144 . 
     The display apparatus according to an exemplary embodiment may include the liquid crystal panel and the light source apparatus configured to irradiate light to the liquid crystal panel. The light source apparatus may include the plurality of light sources configured to emit blue light, and the reflective sheet in which a plurality of holes, through which each of the plurality of light sources is passed, is formed. The plurality of holes may include a first hole disposed at an edge portion of the reflective sheet, and a second hole in which a distance from the edge of the reflective sheet is greater than a distance between the edge of the reflective sheet and the first hole. The light source apparatus may further include the plurality of first light conversion patches arranged along a circumference of a circle surrounding the first hole on the reflective sheet, and the plurality of second light conversion patches arranged along a circumference of a circle surrounding the second hole on the reflective sheet. The size of each of the plurality of first light conversion patches may be greater than the size of each of the plurality of second light conversion patches, and each of the plurality of first and second light conversion patches may include at least one of a yellow fluorescent material, a yellow dye, or a yellow pigment. 
     Accordingly, the ratio of blue light contained in the light may be reduced, and the ratio of yellow light may be further increased at the edge portion of the light source apparatus. Further, a difficulty, in which the edge portion of the light source apparatus is more bluish than the central portion of the light source apparatus, that is, the optical defect may be eliminated. 
     The number of the plurality of first light conversion patches surrounding any one first hole among the plurality of first holes may be greater than the number of the plurality of second light conversion patches surrounding any one second hole among the plurality of second holes. An angular interval between the plurality of first light conversion patches surrounding any one first hole among the plurality of first holes may be less than an angular interval between the plurality of second light conversion patches surrounding any one second hole among the plurality of second holes. 
     Accordingly, at the edge portion of the light source apparatus, the ratio of blue light may be reduced in steps and the ratio of yellow light may be increased in steps. Further, it is possible to maintain uniformity of color between the edge portion of the light source apparatus and the central portion of the light source apparatus. 
     The number of the plurality of first light conversion patches surrounding any one first hole among the plurality of first holes may be equal to the number of the plurality of second light conversion patches surrounding any one second hole among the plurality of second holes. The angular interval between the plurality of first light conversion patches surrounding any one first hole among the plurality of first holes may be equal to an angular interval between the plurality of second light conversion patches surrounding any one second hole among the plurality of second holes. 
     Accordingly, the defect (e.g., optical defect), in which the edge portion of the light source apparatus is more bluish than the central portion of the light source apparatus may be eliminated by using the simple structure described herein. 
     The diameter of each of the plurality of light sources may be between approximately 2.0 millimeters (mm) and 3.0 mm. 
     The diameter of each of the plurality of holes may be between approximately 3.5 mm and 5.5 mm. 
     The distance between the plurality of holes may be between approximately 8.5 mm and 13.5 mm. 
     Each of the plurality of first light conversion patches may be circular or polygonal, and the dimension (e.g. diameter or length) of each of the plurality of first light conversion patches may be between approximately 1.0 mm and 2.0 mm. 
     The plurality of first light conversion patches may include eight light conversion patches surrounding any one first hole among the plurality of first holes. 
     Each of the plurality of second light conversion patches may be circular or polygonal, and a dimension (e.g. diameter or length) of each of the plurality of second light conversion patches may be between approximately 0.8 mm and 1.5 mm. 
     The plurality of second light conversion patches may include four light conversion patches surrounding any one second hole among the plurality of second holes. 
     The plurality of holes may include the third hole in which the distance from the corner of the reflective sheet is a minimum. The light source apparatus may further include the plurality of third light conversion patches arranged along a circumference of a circle surrounding the third hole on the reflective sheet, and the size of each of the plurality of third light conversion patches may be greater than the size of each of the plurality of second light conversion patches. 
     Accordingly, at the corner portion of the light source apparatus, the ratio of blue light may be reduced and the ratio of yellow light may be further increased. Further, the defect (e.g., optical defect), in which the corner portion of the light source apparatus is more bluish than the central portion of the light source apparatus may be eliminated. 
     Each of the plurality of third light conversion patches may be circular or polygonal, and a dimension (e.g. diameter or length) of each of the plurality of third light conversion patches may be between approximately 1.5 mm and 2.5 mm. 
     The plurality of third light conversion patches may include eight light conversion patches surrounding any one third hole among the plurality of third holes. 
     The plurality of first light conversion patches may include a plurality of different first rings surrounding the first hole, and the plurality of second light conversion patches may include a plurality of different second rings surrounding the first hole. The number of the first rings may be greater than the number of the second rings. 
     The plurality of first light conversion patches may include a first ring surrounding the first hole and the plurality of second light conversion patches may include a second ring surrounding the first hole. The width of the first ring may be greater than the width of the second ring. 
     The light source apparatus may further include the light conversion sheet provided to convert a portion of the blue light included in incident light into yellow light and provided to transmit another portion of the blue light. 
     Each of the plurality of first light conversion patches may convert a portion of the blue light included in incident light into yellow light and transmit another portion of the blue light. 
     Each of the plurality of first light conversion patches may absorb a portion of the blue light included in incident light and reflect the yellow light included in the incident light. 
     The display apparatus according to an exemplary embodiment may include the liquid crystal panel, and the light source apparatus configured to irradiate light to the liquid crystal panel. The light source apparatus may include the plurality of light sources configured to emit blue light and the reflective sheet in which the plurality of holes, through which each of the plurality of light sources is passed, is formed. The plurality of holes may include a first hole disposed at an edge portion of the reflective sheet, and a second hole farther away from the edge of the reflective sheet in comparison with the first hole. The light source apparatus may further include the first light conversion patches arranged around the first hole on the reflective sheet, and the second light conversion patches arranged around the second hole on the reflective sheet. An area density of the first light conversion patches may be greater than an area density of the second light conversion patches. 
     The disclosed embodiments may be embodied in the form of a recording medium storing instructions executable by a computer. The instructions may be stored in the form of program code and, when executed by a processor, may generate a program module to perform the operations of the disclosed embodiments. The recording medium may be embodied as a computer-readable recording medium. 
     The computer-readable recording medium includes all kinds of recording media in which instructions which can be decoded by a computer are stored. For example, there may be a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic tape, a magnetic disk, a flash memory, and an optical data storage device. 
     A storage medium readable by machine may be provided in the form of a non-transitory storage medium. Here “non-transitory storage medium” means that the storage medium is a tangible device and does not contain a signal (for example, electromagnetic wave), and this term does not distinguish the case in which data is semi-permanently stored in the storage medium, from the case in which data is temporarily stored. For example, a non-temporary transitory storage medium may include a buffer in which data is temporarily stored. 
     According to an exemplary embodiment, the method according to various embodiments disclosed herein may be provided by being included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. Computer program products may be distributed in the form of a storage medium (for example, compact disc read only memory (CD-ROM)), readable by a device. Alternatively, computer program products may be distributed (for example, downloaded or uploaded) online through an application store (for example, Play Store™) or directly distributed between two user devices (for example, smart phones). In the case of online distribution, at least a portion of the computer program product (for example, downloadable app) may be temporarily stored or created temporarily in a storage medium readable by a device, such as the manufacturer&#39;s server, the application store&#39;s server, or the relay server&#39;s memory. 
     While the present disclosure has been particularly described with reference to exemplary embodiments, it should be understood by those of skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the present disclosure.