Patent Publication Number: US-10310343-B2

Title: Display panel

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Korean Patent Application No. 10-2016-0162177, filed on Nov. 30, 2016 in the Republic of Korea, which is hereby incorporated by reference as if fully set forth herein. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a display panel, and more particularly, to a display panel, which enables the realization of a viewing angle such that it may be viewed only by a user without increasing the thickness of the display panel or the cost thereof. 
     Discussion of the Related Art 
     Among display devices, a liquid crystal display device converts a particular molecular arrangement of liquid crystals into another molecular arrangement by applying a voltage thereto, and converts variation in optical properties of liquid crystal cells that emit light, such as, for example, birefringence, rotatory polarization, and light scattering into variation in the angle of view using such molecular arrangement. As a display device using the modulation of light by liquid crystal cells, a general liquid crystal display device displays an image corresponding to video signals by adjusting the transmittance of light of liquid crystal cells in a liquid crystal panel. 
     Although such a liquid crystal display device basically displays red, green and blue colors R, G and B using a plurality of liquid crystal pixels and color filters, in recent years, exemplary configurations in which separate pixels for the display of white color are added, for example, in order to increase brightness or to control a viewing angle are increasing. 
       FIG. 1  is a view schematically illustrating a general liquid crystal display panel. 
     Referring to  FIG. 1 , the liquid crystal display panel includes a lower polarized plate  54 , a lower substrate  10 , an upper substrate  30  disposed above the lower substrate  10  and spaced apart from the lower substrate  10  by a constant distance, a liquid crystal layer  400  formed between the lower substrate  10  and the upper substrate  30 , an upper polarized plate  52 , and a light control film  60  disposed above the upper substrate  30  to control light. 
     A thin-film transistor array  20  including thin-film transistors TFT is formed on the lower substrate  10 , and red, green and blue color filters  34  are formed on the upper substrate  30 . A black matrix (BM)  32  is formed on the boundary between the color filters  34 . 
     In addition, an overcoat layer  36  is formed over the black matrix  32  and the color filters  34 . 
     Moreover, the light control film  60  includes therein a plurality of partitions (not illustrated), which are spaced apart from each other by a predetermined distance. 
     Accordingly, in the liquid crystal display panel  1 , an image is formed on the entire surface of the liquid crystal display panel  1  by light provided from a light source unit, i.e., a backlight unit (not illustrated) below the liquid crystal display panel  1 . The formed image appears outside through the light control film  60 . 
     At this time, the formed image is viewed to the front side of the liquid crystal display panel  1  by the partitions (not illustrated) in the light control film  60 , whereas light discharged at a side viewing angle is blocked by the light control film  60  so as to be visible only to a user. 
     However, although the general liquid crystal display panel realizes a narrow viewing angle using the light control film, the addition of the light control film is required, which causes an increase in the cost and thickness of products. 
     In particular, in the case where a display having no light control film described above is used in a vehicle, a screen that is visible only to the user is not realized, and, for example, a phenomenon in which the screen is reflected on the windshield of the vehicle, may occur. Thus, the clear view of the vehicle driver is not secured, thereby making smooth operation impossible. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention is directed to a display panel that substantially obviates one or more problems due to limitations and disadvantages of the related art. 
     An object of the present invention is to provide a display panel in which a plurality of light control partitions is formed in a pixel area when a black matrix is formed, which enables the omission of an existing light control film, thereby realizing a viewing angle mode that is visible only to a user without increasing the thickness or manufacturing costs of products. 
     Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
     To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a display panel includes a lower substrate having a thin-film transistor array, an upper substrate disposed so as to face the lower substrate, a black matrix provided on the upper substrate and configured to delimit each pixel area, a light control partition provided in the pixel area of the upper substrate, a color filter provided in the pixel area of the upper substrate, an overcoat layer provided over an entire surface of the upper substrate on which the color filter and the light control partition have been provided, and a liquid crystal layer provided between the upper substrate and the lower substrate. 
     The light control partition may be formed of the same material as the black matrix, or may be formed of a material different from a material of the black matrix. 
     In addition, the light control partition may have the same thickness as the black matrix, or may have a thickness different from a thickness of the black matrix. 
     The light control partition may have a width smaller than a width of the black matrix. 
     In addition, the light control partition may include one or more light control partitions. 
     The light control partitions may have therebetween a distance smaller than a cell gap. 
     The light control partition may have a width smaller than a cell gap. 
     The light control partition may have a thickness greater than a thickness of the black matrix. 
     It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings: 
         FIG. 1  is a view schematically illustrating a general liquid crystal display panel; 
         FIG. 2  is a partial plan view illustrating only a portion of a display panel for explaining the structural features of the display panel according to an embodiment of the present invention; 
         FIG. 3  is a cross-sectional view taken along line III-III of  FIG. 2 , schematically illustrating one pixel of the display panel; 
         FIGS. 4A to 4G  are process cross-sectional views schematically illustrating a method of manufacturing the display panel according to an embodiment of the present invention; 
         FIGS. 5A to 5H  are process cross-sectional views schematically illustrating a method of manufacturing the display panel according to another embodiment of the present invention; and 
         FIG. 6  is a view for explaining a viewing angle of the display panel according to an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, exemplary embodiments of a display panel according to the present invention will be described in detail with reference to the accompanying drawings, so as to allow those skilled in the art to easily implement the exemplary embodiments. 
     It is should be noted that, although a liquid crystal display panel will be described by way of example in the present invention, the present invention is not limited thereto and may be applied to emission-type display devices such as, for example, electroluminescent (EL), light-emitting diode (LED), vacuum fluorescent display (VFD), field emission display (FED), and plasma display panel (PDP) display devices as well as non-emission-type display devices. 
     In addition, the advantages and features of the present invention and the way of attaining them will become apparent with reference to embodiments described below in detail in conjunction with the accompanying drawings. The present invention, however, are not limited to the embodiments disclosed hereinafter and may be embodied in many different forms. Rather, these exemplary embodiments are provided so that this disclosure will be through and complete and will fully convey the scope to those skilled in the art. The scope of the present invention should be defined by the claims. In the drawings, the same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings. 
       FIG. 2  is a partial plan view illustrating only a portion of a display panel for explaining the structural features of the display panel according to an embodiment of the present invention. 
     Referring to  FIG. 2 , in the display panel according to the present invention, red, green and blue display pixels are arranged in a 1×3 matrix form to configure a basic pixel. Here, a plurality of light control partitions  133  is formed in the area in which the red, green and blue display pixels are configured. 
     However, the display panel according to the present invention is not limited to the configuration in which the red, green and blue display pixels are arranged in a 1×3 matrix form to configure a basic pixel, and the red, green and blue display pixels may be arranged in various forms to configure a basic pixel as needed. 
       FIG. 3  is a cross-sectional view taken along line III-III of  FIG. 2 , schematically illustrating one pixel of the display panel. 
     The display panel  100  according to the present invention includes a lower substrate  110 , an upper substrate  130  disposed above the lower substrate  110 , and a liquid crystal layer  150  formed to fill the space between the lower substrate  110  and the upper substrate  130 . 
     The lower substrate  110  is formed of a transparent material such as glass. Data lines and gate lines, which are insulated from each other, are formed on the lower substrate  110  so as to cross each other in order to define a plurality of pixel areas. A thin-film transistor array  120  is configured to form a thin-film transistor for each pixel area, which is defined by the data lines and the gate lines. 
     In addition, a black matrix  132   a  is formed on the upper substrate  130 , which is spaced apart from the lower substrate  110  and disposed to face the lower substrate  110 , in the area that corresponds to the boundary between the pixel areas. 
     In addition, light control partitions  133 , which are spaced apart from one another by a constant distance, are formed in each pixel area of the upper substrate  130  inside the black matrix  132   a . Here, one or more light control partitions  133  may be provided. In addition, the light control partitions  133  may have a rectangular, trapezoidal, triangular, or any other cross-sectional shape. The light control partitions  133  are configured with the same material layer as the black matrix  132   a.    
     In addition, red, green and blue color filters  134  are formed in the pixel areas of the upper substrate  130 . Here, in the pixel areas, in addition to the red, green and blue color filters  134 , the light control partitions  133  are formed. The thickness of the light control partitions  133  is greater than the thickness of the color filters  134  and the thickness of the black matrix  132   a . However, the light control partitions  133  are not limited to the thickness that is greater than the thickness of the color filters  134  and the thickness of the black matrix  132   a , and may have the same thickness as the thickness of the color filters  134  and the thickness of the black matrix  132   a  as needed. 
     In addition, an overcoat layer  136  is formed over the entire surface of the upper substrate  130  on which the color filters  134  and the light control partitions  133  have been formed. 
     In addition, an upper polarizer plate  162  and a lower polarizer plate  164  are formed on the rear surfaces of the upper substrate  130  and the lower substrate  130 . 
     Thus, light, which has been emitted from a backlight unit and moved through the lower substrate  110  and the liquid crystal layer  150 , passes through the color filters  134  of the upper substrate  130 . At this time, because the light is blocked by the light control partitions  133  at a side viewing angle of the upper substrate  130 , the light that has passed through the red, green and blue color filters  134  is not perceived. 
     However, because the light that has passed through the red, green and blue color filters  134  at a front viewing angle of the upper substrate  130  is perceived by a user, the display panel  100  realizes a viewing angle mode that is visible only to the user. 
       FIGS. 4A to 4G  are process cross-sectional views schematically illustrating a method of manufacturing the display panel according to an embodiment of the present invention. 
     As illustrated in  FIG. 4A , the thin-film transistor array  120  is formed on the lower substrate  110 , which is formed of a transparent insulating material such as glass. 
     Explaining processes of forming the thin-film transistor array  120  in detail, after a first metal material is deposited on the lower substrate  110 , the first metal pattern is patterned to form a gate line and a gate electrode  112  extending from the gate line. The first metal material may be aluminum (Al), chrome (Cr), molybdenum (Mo), or tungsten (W). 
     Subsequently, a gate insulation layer  113  is deposited over the entire surface of the lower substrate  110  on which the gate electrode  112  and the gate line have been formed. Here, the gate insulation layer  113  may be formed using an inorganic insulating material such as, for example, silicon nitride (SiNx) or silicon oxide (SiO 2 ). 
     Subsequently, pure amorphous silicon is deposited on the gate insulation layer  113  and is then patterned to form an active layer  114 . At this time, although not illustrated in  FIG. 4A , the active layer  114  is formed as a stack structure of amorphous silicon and doped amorphous silicon. 
     Subsequently, after a second metal material is deposited on the active layer  114 , the second metal material is patterned to form a source electrode  115  and a drain electrode  116 , which are spaced apart from each other. At this time, the second metal material may be aluminum (Al), chrome (Cr), molybdenum (Mo), or tungsten (W). 
     In this way, the gate electrode  112 , the active layer  114 , the source electrode  115 , and the drain electrode  116  constitute a thin-film transistor T. 
     Subsequently, an interlayer insulation layer  117  is formed over the entire surface of the lower substrate  110  on which the source electrode  115  and the drain electrode  116  have been formed. 
     Subsequently, the interlayer insulation layer  117  is patterned to form a drain contact hole, which exposes a portion of the drain electrode  116 . 
     Subsequently, a pixel electrode  118  is formed on the interlayer insulation layer  117  so as to be electrically connected to the drain electrode  116  through the contact hole. At this time, the pixel electrode  118  may be formed using a transparent conductive material such as, for example, ITO or IZO. 
     Subsequently, a lower alignment layer is formed over the entire surface of the lower substrate  110  on which the pixel electrode  118  has been formed. 
     Subsequently, as illustrated in  FIG. 4B , a black matrix layer  132 , which has negative photosensitivity, is formed on the upper substrate  130 , which is formed of a transparent insulating material such as glass. At this time, the black matrix layer  132  may be formed of a black resin having negative photosensitivity, or any other opaque organic material. Alternatively, instead of the black resin having negative photosensitivity, the black matrix layer  132  may be formed of a material having positive photosensitivity. 
     Subsequently, as illustrated in  FIG. 4C , a half-ton mask  140  is disposed on the black matrix layer  132 . At this time, the half-ton mask  140  includes a semi-transmitting portion  142 , which transmits only some light, a transmitting portion  144 , which transmits all light, and a light-blocking portion  146 , which blocks all light. 
     The semi-transmitting portion  142  corresponds to a portion of the black matrix layer  132  that forms a black matrix, and the transmitting portion  144  corresponds to a portion of the black matrix layer  132  that forms the light control partition  133  of the black matrix layer  132 . 
     Subsequently, as illustrated in  FIG. 4D , after irradiating the black matrix layer  132  with light using the half-ton mask  140  as a mask, a portion of the black matrix layer  132 , which is not irradiated with light, is selectively removed through exposure and developing processes, whereby the black matrix  132   a  and the light control partition  133  are formed. 
     At this time, the black matrix  132   a  is formed in the area that correspond to the boundary between a plurality of pixel areas, and the light control partition  133  is formed in each of the pixel areas. In addition, one or more light control partitions  133  may be formed according to resolution or a viewing angle. In addition, the light control partitions  133  may have a rectangular, trapezoidal, triangular or any other cross-sectional shape. In addition, the light control partitions  133  are not limited to being configured with the same material layer as the black matrix  132   a , and may be formed of a material different from that of the black matrix  132   a.    
     In addition, the light control partition  133  may have a thickness greater than the thickness of the black matrix  132   a . However, the light control partition  133  is not limited to the thickness that is greater than the thickness of the black matrix  132   a , and may be formed to have the same thickness as the black matrix  132   a.    
     Subsequently, as illustrated in  FIG. 4E , red, green and blue color filters  134  are formed in the pixel areas of the upper substrate  130 . At this time, in the pixel areas of the upper substrate  130 , in addition to the red, green and blue color filters  134 , the light control partitions  133  are located. 
     Subsequently, as illustrated in  FIG. 4F , the overcoat layer  136  is formed over the entire surface of the upper substrate  130  on which the color filters  134  and the light control partitions  133  have been formed. 
     Subsequently, an upper alignment layer is formed over the entire surface of the overcoat layer  136 . 
     Subsequently, after the upper substrate  130  and the lower substrate  110  are disposed so as to face each other with a constant distance therebetween, the liquid crystal layer  150  is formed between the substrates  110  and  130 . 
     Subsequently, when the upper polarizer plate  162  and the lower polarizer plate  164  are formed on the rear surfaces of the upper substrate  130  and the lower substrate  110 , the process of manufacturing the display panel  100  is completed. 
     In this way, through the method of manufacturing the display panel according to the embodiment of the present invention, because the black matrix  132   a , which separates the respective pixel areas from each other, and the light control partitions  133  may be formed at the same time using one half-ton mask, the number of masking processes and consequently manufacturing costs may be reduced, and the thickness of a product may be reduced owing to the omission of an existing light control film. 
       FIGS. 5A to 5H  are process cross-sectional views schematically illustrating a method of manufacturing a display panel according to another embodiment of the present invention. 
     As illustrated in  FIG. 5A , a thin-film transistor array  220  is formed on a lower substrate  210 , which is formed of a transparent insulating material such as glass. 
     Explaining processes of forming the thin-film transistor array  220  in detail, after a first metal material is deposited on the lower substrate  210 , the first metal pattern is patterned to form a gate line and a gate electrode  212  extending from the gate line. 
     The first metal material may be aluminum (Al), chrome (Cr), molybdenum (Mo), or tungsten (W). 
     Subsequently, a gate insulation layer  213  is deposited over the entire surface of the lower substrate  210  on which the gate electrode  212  and the gate line have been formed. Here, the gate insulation layer  213  may be formed using an inorganic insulating material such as, for example, silicon nitride (SiNx) or silicon oxide (SiO 2 ). 
     Subsequently, pure amorphous silicon is deposited on the gate insulation layer  213  and is then patterned to form an active layer  214 . At this time, the active layer  214  is formed as a stack structure of amorphous silicon and doped amorphous silicon. 
     Subsequently, after a second metal material is deposited on the active layer  214 , the second metal material is patterned to form a source electrode  215  and a drain electrode  216 , which are spaced apart from each other. At this time, the second metal material may be aluminum (Al), chrome (Cr), molybdenum (Mo), or tungsten (W). 
     In this way, the gate electrode  212 , the active layer  214 , the source electrode  215 , and the drain electrode  216  constitute a thin-film transistor T. 
     Subsequently, an interlayer insulation layer  217  is formed over the entire surface of the lower substrate  210  on which the source electrode  215  and the drain electrode  216  have been formed. 
     Subsequently, the interlayer insulation layer  217  is patterned to form a drain contact hole, which exposes a portion of the drain electrode  216 . 
     Subsequently, a pixel electrode  218  is formed on the interlayer insulation layer  217  so as to be electrically connected to the drain electrode  216  through the drain contact hole. At this time, the pixel electrode  218  may be formed using a transparent conductive material such as, for example, ITO or IZO. 
     Subsequently, a lower alignment layer is formed over the entire surface of the lower substrate  210  on which the pixel electrode  218  has been formed. 
     Subsequently, as illustrated in  FIG. 5B , a black matrix layer  232 , which has negative photosensitivity, is formed on an upper substrate  230 , which is formed of a transparent insulating material such as glass. At this time, the black matrix layer  232  may be formed of a black resin having negative photosensitivity, or any other opaque organic material. Alternatively, instead of the black resin having negative photosensitivity, the black matrix layer  232  may be formed of a material having positive photosensitivity. 
     Subsequently, as illustrated in  FIG. 5C , a first photo mask  240  is disposed on the black matrix layer  232 . At this time, the first photo mask  240  includes first and second transmitting portions  242  and  244 , and a light-blocking portion  246 . The first transmitting portion  242  corresponds to a portion of the black matrix layer  232  that forms a black matrix, and the second transmitting portion  244  corresponds to a portion of the black matrix layer  232  that forms a light control partition  233  of the black matrix layer  232 . 
     Subsequently, as illustrated in  FIG. 5D , after irradiating the black matrix layer  232  with light using the first photo mask  240  as a mask, a portion of the black matrix layer  232 , which is not irradiated with light, is removed through exposure and developing processes, whereby a black matrix  232   a  and a dummy black matrix  232   b  are formed. 
     Subsequently, as illustrated in  FIG. 5E , a second photo mask  250  is disposed so as to face the upper surface of the upper substrate  230  on which the black matrix  232   a  and the dummy black matrix  232   b  have been formed. At this time, the second photo mask  250  includes first and second transmitting portions  252  and  254  and a light-blocking portion  256 . The first transmitting portion  252  corresponds to the black matrix  232   a , and the second transmitting portion  254  corresponds to the dummy black matrix  232   b  that forms the light control partition  233 . 
     Subsequently, as illustrated in  FIG. 5F , after irradiating the black matrix  232   a  and the dummy black matrix  232   b  with light using the second photo mask  250  as a mask, a portion of the dummy black matrix  232   b , which is not irradiated with light, is removed through exposure and developing processes, whereby a plurality of light control partitions  233  is formed. At this time, the light control partitions  233  are formed in each of the pixel areas. In addition, one or more light control partitions  133  may be formed according to resolution or a viewing angle. 
     In addition, the light control partition  233  may have the same thickness as the black matrix  232   a . However, the light control partition  233  is not limited to the same thickness as the black matrix  232   a , and may be formed to have a thickness greater than that of the black matrix  232   a.    
     The light control partition  233  may have the same thickness as the black matrix  232   a . However, the light control partition  233  is not limited to the same thickness as the black matrix  232   a , and may have a thickness greater or smaller than the thickness of the black matrix  232   a.    
     Subsequently, as illustrated in  FIG. 5G , red, green and blue color filters  234  are formed in the pixel areas of the upper substrate  230 . At this time, in the pixel areas of the upper substrate  230 , in addition to the red, green and blue color filters  234 , the light control partitions  233  are located. 
     Subsequently, as illustrated in  FIG. 5H , an overcoat layer  236  is formed over the entire surface of the upper substrate  230  on which the color filters  234  and the light control partitions  233  have been formed. 
     Subsequently, an upper alignment layer is formed over the entire surface of the overcoat layer  236 . 
     Subsequently, after the upper substrate  230  and the lower substrate  210  are disposed so as to face each other with a constant distance therebetween, a liquid crystal layer  260  is formed between the substrates  210  and  230 . 
     Subsequently, when an upper polarizer plate and a lower polarizer plate are formed on the rear surfaces of the upper substrate  230  and the lower substrate  210 , the process of manufacturing the display panel  200  is completed. 
     In this way, through the method of manufacturing the display panel according to the other embodiment of the present invention, although two separate masks are used and thus the number of masking processes is increased, the plurality of light control partitions may be formed with a higher resolution, which enables more precise pattern formation and may realize an excellent narrow viewing angle mode. 
       FIG. 6  is a view for explaining a viewing angle of the display panel according to an embodiment of the present invention. 
     In particular,  FIG. 6  is a view for explaining a viewing angle that results when three light control partitions  133   a ,  133   b  and  133   c  are formed in each pixel area. 
     As illustrated in  FIG. 6 , the light control partitions  133  include a first light control partition  133   a  located at the center, and a second light control partition  133   b  and a third light control partition  133   c , which are spaced apart leftward and rightward from the first light control partition  133   a  by a constant distance. 
     Here, on the basis of a center point on the upper surface of the lower substrate  110 , a viewing angle between one side surface of the first light control partition  133   a  and the lower end of one side surface of the third light control partition  133   c , i.e., the point at which the third light control partition  133   c , which is located at the right side of the first light control partition  133   a , comes into contact with the upper substrate  130  is designated by tan θ 1 . Here, θ 1  indicates the maximum viewing angle. 
     In addition, on the basis of a center point on the upper surface of the lower substrate  110 , a viewing angle between one side surface of the first light control partition  133   a  and the lower end of one side surface of the second light control partition  133   b , i.e., the point at which the second light control partition  133   b , which is located at the left side of the first light control partition  133   a , comes into contact with the upper substrate  130  is designated by tan θ 2 . 
     In addition, the width of the first, second and third light control partitions  133   a ,  133   b  and  133   c , i.e., a first distance, is designated by d 1 , and a second distance between the first, second and third light control partitions  133   a ,  133   b  and  133   c  is designated by d 2 . In addition, a third distance between the upper substrate  130  and the lower substrate  110  is designated by d 3 . Here, the third distance d 3  is defined as the distance including the height of the partitions d 3 - 1 , the thickness of the overcoat layer d 3 - 2  excluding the height difference between the partition  133  and the color filter  134 , and a cell gap d 3 - 3 . 
     For example, assuming that the first distance d 1  is about 8 μm, the second distance d 2  is 8 μm, and the third distance d 3  is 9 μm, the viewing angle becomes about 42 degrees because tan θ 1 =8/9=0.889, and the viewing angle becomes about 60 degrees because tan θ 2 =16/9=1.778. 
     In addition, the distance d 2  between the light control partitions may be smaller than the cell gap d 3 - 3 , and the width d 1  of the light control partitions may be smaller than the cell gap d 3 - 3 . In addition, the width of the light control partitions may be smaller than the width of the black matrix  132   a.    
     Accordingly, the viewing angle of the structure described above becomes 42 degrees because light is not transmitted at viewing angles of 42 degrees or more. Here, when θ 2  exceeds θ 1 , for example, 42 degrees and reaches 60 degrees, the light passes through the corner of the top of the first light control partition  133   a  and the bottom of the pixel area, i.e., the corner of the bottom of the second light control partition  133   b . No light leaks before and after the light passes through the top and bottom of the light control partitions. Hence, the viewing angle θ 1  in the partition structure becomes 42 degrees. 
     In particular, when it is desired to reduce a viewing angle, this may be realized by reducing the second distance d 2 . That is, in order to reduce the viewing angle to about ±30 degrees or less, the second distance d 2  of the light control partitions  133  may be about 5 μm. 
     In addition, when it is desired to increase a viewing angle, the first distance d 1  may be reduced, or the height of the partition d 3 - 1  may be reduced. 
     In this way, the present invention may control the characteristics of the viewing angle by selectively adjusting the first distance d 1 , the second distance d 2  and the third distance d 3 . 
     As is apparent from the above description, in a display panel according to the present invention, a plurality of light control partitions may be formed in each pixel area simultaneously with the formation of a black matrix, which enables the omission of an existing light control film. Thereby, a narrow viewing angle may be realized without increasing the thickness or manufacturing cost of a product. 
     It will be understood by those skilled in the art that the present invention may be implemented into various other concrete forms without changing the technical idea or essential features of the present invention. 
     Accordingly, the disclosed embodiments are provided for the purpose of description and are not intended to limit the technical scope of the disclosure, and the technical scope of the disclosure is not limited by the embodiments. The range of the disclosure should be interpreted based on the following claims, and all technical ideas that fall within the range equivalent to the claims should be understood as belonging to the scope of the disclosure.