Patent Publication Number: US-2023146908-A1

Title: White light emitting device and display device using the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This is a continuation of U.S. application Ser. No. 17/365,701 filed Jul. 1, 2021, which is a continuation of U.S. application Ser. No. 16/723,520, filed on Dec. 20, 2019, issued as U.S. Pat. No. 11,112,648 on Sep. 7, 2021, which is a continuation of U.S. application Ser. No. 14/958,453, filed on Dec. 3, 2015, issued as U.S. Pat. No. 10,545,375 on Jan. 28, 2020, which claims priority from Korean Patent Application No. 10-2014-0171973, filed on Dec. 3, 2014, and Korean Patent Application No. 10-2015-0092852, filed on Jun. 30, 2015, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Exemplary embodiments relate to a white light emitting device which emits white light using a light source which emits a monochromatic light and a display panel including the same. 
     2. Description of the Related Art 
     Light emitting devices such as light emitting diodes (LEDs) are optical semiconductor devices which emit light by recombination of minority carriers (electrons or holes). Light generated by the recombination of the minority carriers is a monochromatic light having a certain range of a wavelength. 
     Methods of generating white light include using a plurality of light emitting devices emitting a variety of the monochromatic light having complementary colors, and a using one light emitting device and a phosphor having a complementary color of the monochromatic light emitted by the light emitting device. 
     When white light is synthesized using a plurality of light emitting devices, a color reproduction range may be widened. However, because electrical characteristics of each of the light emitting devices may be different from each other, driving circuits become complex, and because the characteristic change of the light emitting devices according to usages are different from each other, color uniformity may not be ensured. 
     In addition, when white light is synthesized using one light emitting device and a phosphor, driving circuits may be simplified. However, color uniformity cannot be ensured due to reflection, refraction, or the like of the monochromatic light. 
     SUMMARY 
     Therefore, it is an aspect of the exemplary embodiments to provide a white light emitting device having improved color uniformity and a display panel using the same. 
     Additional aspects of the exemplary embodiments will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the exemplary embodiments. 
     According to an aspect of an exemplary embodiment, a white light emitting device includes a circuit board; a plurality of light sources mounted on the circuit board, each light source of the plurality of light sources configured to emit monochromatic light; a light converter spaced apart from the circuit board, the light converter configured to convert the monochromatic light emitted from the light sources to white light; and a compensator provided between the circuit board and the light converter, the compensator configured to convert the emitted monochromatic light to white light. 
     The compensator may include a plurality of phosphor members formed of a phosphor having a color that is complementary to a color of the emitted monochromatic light. 
     The plurality of phosphor members may be disposed between the plurality of light sources. 
     At least one phosphor member of the plurality of phosphor members may be disposed inside at least one light source of the plurality of light sources. 
     The at least one light source may include a light emitting device package configured to generate a monochromatic light; and a lens configured to accommodate the light emitting device package and emit the monochromatic light, and the at least one phosphor member may be disposed between the light emitting device package and the lens and convert a monochromatic light reflected inside of the at least one light source to white light. 
     An arrangement pattern of the plurality of phosphor members may be determined according to a pattern of a color mura of the white light emitted from the light converter. 
     The plurality of phosphor members may include a first group of phosphor members disposed on an edge of the circuit board, and a second group of phosphor members disposed at a center of the circuit board, and the first group may be more densely arranged than the second group. 
     A size of the phosphor members may be determined according to a level of a color mura of white light converted from the light converter. 
     The plurality of phosphor members may include a first phosphor member having first size and located on an edge of the circuit board and a second phosphor member having a second size and located on a center of the circuit board, and the first size may be greater than the second size. 
     The white light emitting device may include a coated layer stacked on the compensator. 
     The white light emitting device may include a reflector including a plurality of openings corresponding to the plurality of light sources, stacked on the circuit board, and reflecting the monochromatic light toward the light converter. 
     According to another aspect of an exemplary embodiment, a white light emitting device includes a circuit board; a plurality of light sources mounted on the circuit board, each light source of the plurality of light sources configured to emit blue light; a light converter spaced apart from the circuit board, the light converter configured to convert the blue light emitted from the light sources to white light; a reflective sheet stacked on the circuit board, the reflective sheet configured to reflect the blue light toward the light converter; and a compensator provided between the circuit board and the reflective sheet, the compensator configured to convert the blue light to white light. 
     The compensator may include a plurality of phosphor members having a yellow phosphor. 
     The plurality of phosphor members may be arranged between the plurality of light sources. 
     An arrangement pattern of the plurality of phosphor members may be determined according to a pattern of a color mura of the white light converted from the light converter. 
     The plurality of phosphor members may include a first group of phosphor members disposed on an edge of the circuit board, and a second group of phosphor members disposed at a center of the circuit board, and the first group may be more densely arranged than the second group. 
     The plurality of phosphor members may be directly printed and formed on the reflective sheet. 
     At least one light source of the plurality of light sources may include a light emitting device package configured to generate blue light; and a lens configured to emit the blue light generated from the light emitting device package, and the plurality of phosphor members are disposed between the lens and the light emitting device package. 
     The compensator may be formed of at least one from among a sheet or film having the plurality of phosphor members, and the compensator may be bonded to the reflective sheet. 
     The compensator may be formed by depositing the plurality of phosphor members on the reflective sheet. 
     The compensator may be formed by bonding the plurality of phosphor members to the reflective sheet. 
     According to a further aspect of an exemplary embodiment, a display device includes a liquid crystal panel; a light guide plate provided in a rear of the liquid crystal panel; and a white light emitting device provided in a rear of the light guide plate the white light emitting device configured to emit white light onto the light guide plate, wherein the white light emitting device includes: a circuit board; a plurality of light sources mounted on the circuit board, each light source of the plurality of light sources configured to emit a monochromatic light; a light converter spaced apart from the circuit board, the light converter configured to convert the monochromatic light incident from the light sources to white light; and a compensator provided between the circuit board and the light converter, the compensator configured to convert the incident monochromatic light to white light. 
     According to a still further aspect of an exemplary embodiment, a white light emitting device includes a circuit board; a light source mounted on the circuit board, the light source configured to emit a monochromatic light; a light converter configured to convert the emitted monochromatic light to white light; and a compensator provided between the circuit board and the light converter, wherein a portion of the emitted monochromatic light is reflected by at least one from among the light converter or the circuit board, and the compensator may be configured to convert the reflected monochromatic light to white light. 
     The compensator may include a plurality of phosphor members formed of a phosphor having a color that is complementary to a color of the reflected monochromatic light. 
     The plurality of phosphor members may be disposed on the circuit board adjacent to the light source. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and/or other aspects of the exemplary embodiments will become apparent and more readily appreciated from the following description, taken in conjunction with the accompanying drawings of which: 
         FIG.  1    is a schematic exploded perspective view of a white light emitting device in accordance with an exemplary embodiment; 
         FIG.  2    is a cross-sectional view of a light source of a white light emitting device in accordance with an exemplary embodiment; 
         FIG.  3    is a view for describing an exemplary embodiment of a light emitting device which emits a monochromatic light; 
         FIG.  4    is a cross-sectional view of a white light emitting device in accordance with an exemplary embodiment; 
         FIG.  5    is a cross-sectional view of a white light emitting device in accordance with another exemplary embodiment; 
         FIG.  6    is a cross-sectional view of a white light emitting device in accordance with still another exemplary embodiment; 
         FIG.  7    is a view for describing an arrangement pattern of phosphor members according to one exemplary embodiment; 
         FIG.  8    is a view for describing an arrangement pattern of phosphor members according to another exemplary embodiment; 
         FIG.  9    is a view for describing an arrangement pattern of phosphor members according to still another exemplary embodiment; 
         FIG.  10    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment; 
         FIG.  11    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment; 
         FIG.  12    is a view for describing a pattern of a color mura of a white light emitting device in accordance with one exemplary embodiment; 
         FIG.  13    is a view for describing an arrangement pattern of phosphor members on an edge of the white light emitting device in accordance with one exemplary embodiment; 
         FIG.  14    is a view for describing an arrangement pattern of phosphor members on an edge of the white light emitting device in accordance with another exemplary embodiment; 
         FIG.  15    is a cross-sectional view for describing an arrangement position change of phosphor members of a white light emitting device in accordance with one exemplary embodiment; 
         FIG.  16    is a cross-sectional view for describing an arrangement position change of phosphor members of a white light emitting device in accordance with another exemplary embodiment; 
         FIG.  17    is a cross-sectional view for describing an arrangement position change of phosphor members of a white light emitting device in accordance with still another exemplary embodiment; 
         FIG.  18    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment; 
         FIG.  19    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment; 
         FIG.  20    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment; 
         FIG.  21    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment; 
         FIG.  22    is an exploded perspective view of a display device in accordance with one exemplary embodiment; 
         FIG.  23    is an exploded perspective view of a display device in accordance with another exemplary embodiment; 
         FIG.  24    is a schematic exploded perspective view of a white light emitting device including a plurality of light source module; 
         FIG.  25    is a schematic perspective view for describing a light source module; 
         FIG.  26    is a cross-sectional view of a white light emitting device; 
         FIG.  27    is a cross-sectional view of a white light emitting device which further includes a coated layer; 
         FIG.  28    is an exploded perspective view of a white light emitting device which further includes a reflector; and 
         FIG.  29    is a cross-sectional view of a white light emitting device which further includes a reflector. 
     
    
    
     DETAILED DESCRIPTION 
     Advantages and features of the exemplary embodiments and methods of achieving the same will be clearly understood with reference to the accompanying drawings and the following detailed description. However the description is not limited to the exemplary embodiments to be disclosed, but may be implemented in various different forms. The exemplary embodiments are not intended to modify the scope as defined by the appended claims. Hereinafter, the exemplary embodiments will be described in detail with reference to accompanying views. 
     Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals generally refer to like elements throughout. 
       FIG.  1    is a schematic exploded perspective view of a white light emitting device in accordance with one exemplary embodiment. 
     Referring to  FIG.  1   , a white light emitting device  100  in accordance with one exemplary embodiment may include a circuit board  110 , a plurality of light sources  120  which are mounted on the circuit board  110  and emit a variety of monochromatic light (ML), a light converter  130  which converts the monochromatic light to white light, and a compensator  140  which is provided between the plurality of light sources  120  and reduces a color mura. 
     The monochromatic light having a wavelength in a certain range visually appears as one color. For example, the monochromatic light may have one color from among blue light, red light, and green light. 
     The plurality of light sources  120  are mounted on the circuit board  110 . An electrode pattern or a circuit pattern may be formed on the circuit board  110 , the light sources  120  and the circuit board  110  may be electrically connected by a wire bonding or flip chip bonding method, etc. The circuit board  110  may be implemented by a printed circuit board  110 , but it may also be implemented by a flexible circuit board  110  (flexible copper clad laminate) according to necessity. 
       FIG.  2    is a cross-sectional view of a light source  120  of a white light emitting device  100  in accordance with one exemplary embodiment.  FIG.  3    is a view for describing one exemplary embodiment of a light emitting device  121   a  which emits a monochromatic light. 
     As shown in  FIG.  2   , a light source  120  may be provided as a package type and mounted on a circuit board  110 . The light source  120  generates and emits a monochromatic light. Specifically, the light source  120  includes a light emitting device package  121  which generates the monochromatic light and a lens  122  which emits the monochromatic light. 
     The light emitting device package  121  includes the light emitting device  121   a  which emits the monochromatic light and a body  121   b  in which the light emitting device  121   a  is accommodated. The light emitting device  121   a  may be a light emitting diode (LED). Hereinafter, an exemplary embodiment of the light emitting device  121   a  will be described with reference to  FIG.  3   . 
     As shown in  FIG.  3   , the light emitting device  121   a  may have a structure in which a substrate  1211 , an N-type semiconductor layer  1212 , an active layer  1213 , and a P-type semiconductor layer  1214  are sequentially stacked. 
     The substrate  1211  may be formed of a transparent material such as sapphire, and also formed of zinc oxide (ZnO), gallium nitride (GaN), silicon carbide (SiC), and aluminum nitride (AlN) in addition to sapphire. 
     In some exemplary embodiments, a buffer layer may be formed between the substrate  1211  and the N-type semiconductor layer  1212 . The buffer layer is for improving lattice matching before growing the N-type semiconductor layer  1212  on the substrate  1211 , and may be omitted according to process conditions and device characteristics. 
     The N-type semiconductor layer  1212  may be formed of a semiconductor material which has a compositional formula of InXAlYGa (1−X−Y) N (here, 0≤X, 0≤Y, and X+Y≤1). In more detail, the N-type semiconductor layer  1212  may be formed with a GaN layer or a GaN/AlGaN layer doped with N-type conductive impurities, and for example, silicon (Si), germanium (Ge), tin (Sn), or the like may be used as the N-type conductive impurities. 
     The N-type semiconductor layer  1212  may be classified as a first layer  1212   a  and a second layer  1212   b.  The first layer  1212   a  may define a light emitting face, and the first layer  1212   a  is formed to have an area larger than the second layer  1212   b,  and an optical characteristic of the light emitting device  121   a  may be improved. On the second layer  1212   b,  an active layer  1213  and the P-type semiconductor layer  1214  may be sequentially stacked to form a light emitting structure. 
     The active layer  1213  may be formed with an InGaN/GaN layer having a multi-quantum well structure. 
     The P-type semiconductor layer  1214  may be formed of a semiconductor material which has a compositional formula of InXAlYGa (1−X−Y) N (here, 0≤X, 0≤Y, and X+Y≤1). In more detail, the P-type semiconductor layer  1214  may be formed with a GaN layer or a GaN/AlGaN layer doped with P-type conductive impurities, and for example, magnesium (Mg), zinc (Zn), beryllium (Be), or the like may be used as the P-type conductive impurities. 
     An N-type electrode  1215  is formed on the N-type semiconductor layer  1212 , and a P-type electrode  1216  is formed on the P-type semiconductor layer  1214 . 
     An adhesive layer  1217  may have a structure in which metal layers respectively formed of a single element are stacked as a multilayer, and include a reflective material to prevent that the reflectivity of a lead frame affects the characteristics of the light emitting devices  121   a.  For example, the adhesive layer  1217  may be formed of a metal containing tin (Sn) or silver (Ag). 
     The lead frame is formed on the bottom of the body  121   b  to supply a power source from the light emitting device  121   a.  In addition, the lead frame may include a reflective material or be coated with a reflective material which may reflect light generated by the light emitting device  121   a.    
     The lead frame includes a first lead frame and a second lead frame. The first lead frame and the second lead frame have an interval of a certain distance, and the first lead frame is electrically connected to the N-type electrode  1215  and the second lead frame is electrically connected to the P-type electrode  1216 . 
     When power is applied to the above-described light emitting device package  121 , electrons and holes flow from the N-type semiconductor layer  1212  and the P-type semiconductor layer  1214  into the active layer  1213 , and a monochromatic light is generated by recombination of the electrons and holes flowing into the active layer  1213 . 
     A color of the monochromatic light generated by the light emitting device package  121  may be determined by a component of the semiconductor described above. For example, when a GaN based semiconductor is used, the light emitting device  121   a  generates blue light. 
     Meanwhile,  FIG.  3    is a simple view for describing one exemplary embodiment of the light emitting device package  121 , but the structure of the light emitting device package  121  is not limited thereto. For example, in some exemplary embodiments, the light emitting device  121   a  may have a structure in which the P-type semiconductor layer  1214  is disposed on an upper part thereof and the N-type semiconductor layer  1212  is disposed on a lower part thereof. 
     Referring again to  FIG.  2   , the body  121   b  accommodates the light emitting device  121   a.  The body  121   b  may be formed of at least one from among a resin based material such as polyphthalamide (PPA), silicon (Si), aluminum (Al), aluminum nitride (AlN), a liquid crystal polymer (PSG, photo sensitive glass), a polyamide9T (PA9T), a syndiotactic polystyrene (SPS), a metal material, sapphire (Al2O3), beryllium oxide (BeO), and a printed circuit board (PCB)  110 , but it is not limited thereto. 
     The body  121   b  may be formed by an injection molding process, an etching process, or the like but is not limited thereto. For example, the body  121   b  may be integrally formed with the circuit board  110  by an injection molding process. 
     In addition, the body  121   b  includes a cavity  123  which accommodates the light emitting device  121   a  described above. A width and a height of the cavity  123  may be larger than those of the light emitting device  121   a,  but those are not limited thereto. 
     The cavity  123  may be formed in a shape in which the width of the cavity  123  decreases in a downward direction. That is, a sidewall  124  of the cavity  123  may be formed to be sloped. Here, a reflection angle of the monochromatic light emitted by the light emitting device  121   a  varies according to an angle of the sidewall  124 . Therefore, the degree of slope of the sidewall  124  may be adjusted to adjust a beam angle of the monochromatic light. 
     Specifically, when the degree of slope of the sidewall  124  is decreased, a beam angle of the light is decreased and convergence of light emitted into the outside from the light emitting device  121   a  is increased. On the contrary, when the degree of slope of the sidewall  124  is increased, the beam angle of light is increased and convergence of light emitted into the outside from the light emitting device  121   a  is decreased. 
     In addition, a reflective material which reflects light generated by the light emitting device  121   a  may be coated on the sidewall  124  and a use rate of light generated by the light emitting device  121   a  may be increased. 
     In some exemplary embodiments, the cavity  123  is molded with a material which has excellent or otherwise desirable water tightness, corrosion resistance, and electric insulation, and may encapsulate the light emitting device  121   a  mounted inside the cavity  123 . For example, the cavity  123  may be molded with an epoxy resin or silicon resin, or the like, and the molding process may be performed by an ultraviolet ray method or a heat curing method. 
     The lens  122  is provided outside of the light emitting device package  121 , and guides the monochromatic light generated by the emitting device package  121 . The lens  122  emits the monochromatic light generated by the light emitting device package  121  in a direction of a light converter  130 . 
     The lens  122  may have a wide beam angle of light. The monochromatic light emitted by the light emitting device package  121  may be widened through the lens  122 . Therefore, when the beam angle of light is widened, because the light source  120  and the light converter  130  may be provided adjacently, a thickness of the white light emitting device  100  may become small. 
     In addition, when the beam angle of light is widened, because the monochromatic light emitted by the plurality of light emitting device packages  121  is uniformly incident to the light converter  130 , the brightness uniformity of the white light emitting device  100  may be increased. 
     As shown in  FIGS.  1  to  3   , the lens  122  may be formed in a hemispherical shape, but the shape of the lens  122  is not limited thereto. 
     For example, the shape of the lens  122  may be one selected from among a square pillar such as a regular hexahedron, a cylindrical type, an elliptical type, a bat-wing type having a concave center. However, the hemispherical shape can have excellent or desirable incident efficiency into a light converting layer. 
     Meanwhile, although the light sources  120  arranged in a rectangular shape is shown in  FIG.  1   , the arrangement of the light sources  120  is not limited thereto. That is, the plurality of light sources  120  may be arranged in various shapes to reduce the deviation of brightness and colors, and to improve in the output uniformity of white light. For example, the light sources  120  may be arranged in a hexagonal shape. 
       FIG.  4    is a cross-sectional view of a white light emitting device  100  in accordance with one exemplary embodiment. 
     Referring to  FIGS.  1  and  4   , the light converter  130  converts an incident monochromatic light to white light and guides the white light to the front thereof. To this end, the light converter  130  may include a phosphor which converts a wavelength of the incident monochromatic light to a monochromatic light of different color to be transferred. 
     For example, although the phosphor may include at least one of a variety of light emitting material among a yttrium aluminum garnet (YAG) based material, a terbium aluminum garnet (TAG) based material, a silicate based material, a sulfide based material, a nitride based material, a borate based material, and a phosphate based material, the light emitting material configuring the phosphor is not limited thereto. 
     The light emitting material configuring the phosphor may be determined according to a monochromatic light incident from the light source  120 . That is, the light converter  130  may include a phosphor emitting light having a complementary color of the monochromatic light emitted from the light source  120 . 
     For example, when the light source  120  emits blue light, the light converter  130  may include a yellow light emitting phosphor having a complementary color of a blue color. The yellow light emitting phosphor includes a YAG based light emitting material, absorbs incident blue light, and emits yellow light. Then, blue light not involved in light emitting of the yellow color phosphor and yellow light emitted by the yellow color phosphor are mixed to become white light. 
     In some exemplary embodiments, when the light source  120  emits red light, the light converter  130  may include a cyan light emitting phosphor having a complementary color of the red color, and when the light source  120  emits green light, the light converter  130  may include a magenta light emitting phosphor having a complementary color of the green color. 
     Meanwhile, the light converter  130  may convert a monochromatic light to white light using a plurality of phosphors. As described above, the light converter  130  converts the monochromatic light to white light based on a principle of mixing light. For example, white light may also be generated by mixing blue light, red light, and green light. 
     Therefore, the light converter  130  may include a plurality of phosphors which emit different colors from each other. That is, the light converter  130  may generate complementary color light having a complementary color of the monochromatic light emitted by the light source  120  using the plurality of phosphors. 
     For example, when the monochromatic light emitted by the light source  120  is blue, the light converter  130  may include a green light emitting phosphor and red light emitting phosphor. The red light emitting phosphor absorbs incident blue light and emits red light, and the green light emitting phosphor absorbs blue light and emits green light. 
     Accordingly, blue light not involved in light emitting of phosphor, green light emitted by the green light emitting phosphor, and red light emitted by red light emitting phosphor may be mixed to become white light. Here, the green light emitting phosphor and red light emitting phosphor may be formed on different layers. 
     A green light emitting phosphor may include at least one selected from a group of a nitride based phosphor, a sulfide based phosphor, a silicate based phosphor, and a quantum dot based phosphor. 
     A red light emitting phosphor may include at least one selected from a group of a nitride based phosphor, a sulfide based phosphor, a fluorinated based phosphor, and a quantum dot based phosphor. 
     A compensator  140  improves the color uniformity of a white light emitting device  100 . A color mura occurs in the white light emitting device  100  by refraction, reflection, and diffraction of the monochromatic light generated from the white light emitting device  100 . Color mura can be, for example, an unevenness or non-uniformity in the white light produced by the white light emitting device  100 . The compensator  140  is located between a circuit board  110  and a light converter  130 , and may convert a monochromatic light, which is refracted, reflected, and diffracted, to white light to compensate the color mura. 
     Specifically, as shown in  FIG.  4   , the monochromatic light generated by a light emitting device package  121  is emitted onto a light converter  130  through a lens  122 . However, part of the monochromatic light generated by the light emitting device package  121  may be scattered, reflected, diffracted, and recycled in the white light emitting device  100 , and is incident to the light converter  130 . For example, a monochromatic light refracted by the lens  122  is reflected by a substrate and is incident to the light converter  130 . 
     A color mura occurs in the white light emitting device  100  by a difference between incident paths of the monochromatic light. Specifically, a comparatively great amount of blue light is incident to a part P 1  of the light converter  130  adjacent to the light source  120 , and a bluish color of white light WL is emitted therefrom. However, a comparatively great amount of blue light having a different path is incident to a part P 2  of the light converter  130  between the light source  120  and another light source  120 , and a yellowish color of white light WL is emitted therefrom. 
     Therefore, the compensator  140  converts part of light incident to the light converter  130  through a different light path to white light to reduce the color mura. The compensator  140  may include at least one phosphor member  141  which converts an incident monochromatic light to white light. 
     The phosphor member  141  may include a phosphor which converts a wavelength of the incident monochromatic light to emit a different color of the monochromatic light. The phosphor included in the phosphor member  141  may include various kinds of phosphors described above, and convert an incident monochromatic light to different wavelength light to emit the light. 
     Here, a light emitting material configuring a phosphor may be determined according to an incident monochromatic light ML from the light source  120 . That is, the phosphor member  141  may include a phosphor which emits a complementary color of a monochromatic light ML emitted by the light source  120 . 
     Because the same monochromatic light ML is incident to the compensator  140  and the light converter  130 , a phosphor of the phosphor member  141  and a phosphor of the light converter  130  may be the same, but it is not limited thereto. 
     For example, because the phosphor member  141  may include a yellow light emitting phosphor, incident blue light is converted to white light, and because the light converter  130  may include a red light emitting phosphor and green light emitting phosphor, incident blue light is converted to white light. 
     On the contrary, because the light converter  130  may include a yellow light emitting phosphor, incident blue light is converted to white light, and because the phosphor member  141  may include a red light emitting phosphor and green light emitting phosphor, incident blue light is converted to white light. 
     Thus, the compensator  140  may convert part of the monochromatic light ML, which is scattered or reflected and is incident to light converter  130 , to white light to improve the color uniformity of the white light emitting device  100 . 
     While the disposition of the compensator  140  has no limitation, as shown in  FIG.  4   , in some exemplary embodiments the compensator  140  may be provided adjacent the circuit board  110 , and convert monochromatic light ML reflected by the circuit board  110  to white light. 
     Here, as shown in  FIG.  1   , the compensator  140  may be provided in a shape of a compensation sheet or compensation film including the phosphor member  141 , and formed by bonding the compensation sheet or the compensation film to the circuit board  110 . But, a method of forming the compensator  40  is not limited thereto. 
     In another exemplary embodiment, as shown in  FIG.  23   , a compensator  140  may be directly formed on a circuit board  110 . Specifically, the compensator  140  may be formed by a method of coating phosphor members  141  in a regular pattern onto the circuit board  110 , or a method of depositing phosphor members  141  in a regular pattern on the circuit board  110 . 
     In addition, the compensator  140  may be also formed by a method of directly printing phosphor members  141  on the circuit board  110 . Specifically, the compensator  140  may be formed by a method of mixing a phosphor with an adhesive configured to fix the phosphor to the circuit board  110  in order to form a phosphor ink, and directly printing the phosphor ink formed on the circuit board  110  in order to form the phosphor members  141 . Here, the phosphor members  141  may also be formed in a regular pattern. A pattern of the phosphor members  141  will be described in detail below. 
       FIG.  5    is a cross-sectional view of a white light emitting device  100  in accordance with another exemplary embodiment. 
     Referring to  FIG.  5   , a white light emitting device  100  may further include a reflector  150 . The reflector  150  may be stacked on a circuit board  110 . The reflector  150  may reflect a monochromatic light emitted by a light source  120  toward a light converter  130  to increase the utilization rate of monochromatic light. 
     The reflector  150  may be formed with a reflective member which has a good elastic force and excellent light reflectivity and which is easy to form in a thin film. For example, the reflector  150  may be formed of reflective material such as a polyethylene terephthalate (PET) of a white color, a polycarbonate (PC), or the like of a white color. 
     Although the reflector  150  may be provided in a reflective sheet or reflective film shape and be coupled to the circuit board  110  by bonding to the circuit board  110  on which a compensator  140  is provided, a method of forming the reflector  150  is not limited thereto. 
     For example, the reflector  150  may be formed by a method of depositing a reflective member on the circuit board  110  on which the compensator  140  is provided, or printing or coating the reflective member mixed with the adhesive onto the circuit board  110  on which the compensator  140  is provided by mixing a reflective member with an adhesive. 
       FIG.  6    is a cross-sectional view of a white light emitting device  100  in accordance with still another exemplary embodiment. 
     Referring to  FIG.  6   , a white light emitting device  100  in accordance with still another exemplary embodiment may include a circuit board  110 , a plurality of light sources  120  which are mounted on the circuit board  110  and each emit a monochromatic light, a light converter  130  which converts the monochromatic light ML to white light, a reflective sheet provided on the circuit board  110 , and a compensator  140  provided on the reflective sheet. 
     Although the compensator  140  is provided under the reflector  150  in  FIGS.  4  and  5   , as shown in  FIG.  6   , the circuit board  110 , a reflector  150 , the compensator  140  may be stacked sequentially. In other exemplary embodiments, the circuit board  110 , a reflector  150 , the compensator  140  may be stacked in any desired order. When the stacking sequence of the white light emitting device  100  is changed, a method of fabricating the white light emitting device  100  may also be changed. 
     As described above, the reflector  150  is provided in a shape of a reflective sheet or reflective film, and the compensator  140  is provided in a shape of a compensation sheet or compensation film, and the sheet or the film may be stacked sequentially to form a lower part of the white light emitting device  100 . However, the method of forming the lower part of the white light emitting device  100  is not limited thereto. 
     As another exemplary embodiment, a compensator  140  is formed on a reflective sheet or reflective film, and the reflective sheet or the reflective film may be coupled to a circuit board  110  to form a lower part of a white light emitting device  100 . 
     Specifically, the compensator  140  may be formed by a method of coating phosphor members  141  in a regular pattern onto the reflective sheet or the reflective film, or a method of depositing the phosphor members  141  in a regular pattern on the reflective sheet or the reflective film. 
     In addition, the compensator  140  may also be formed by a method of directly printing the phosphor members  141  onto the reflective sheet or the reflective film. The compensator  140  may be formed by a method of mixing a phosphor with an adhesive configured to fix the phosphor to the reflective sheet or the reflective film in order to form a phosphor ink, and directly printing the phosphor ink formed onto the reflective sheet or the reflective film in order to form the phosphor members  141 . Here, the phosphor members  141  may be formed in a regular pattern. 
     Hereinafter, shapes of phosphor members  141  and an arrangement pattern of phosphor members  141  may be described in detail. 
       FIG.  7    is a view for describing one exemplary embodiment of an arrangement pattern of phosphor members according to one exemplary embodiment.  FIG.  8    is a view for describing an arrangement pattern of phosphor members according to another exemplary embodiment.  FIG.  9    is a view for describing an arrangement pattern of phosphor members according to still another exemplary embodiment.  FIG.  10    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment. 
     Referring to  FIGS.  7  to  10   , phosphor members  141  may be formed in various shapes. For example, phosphor members  141  may be provided in a rectangular shape as shown in  FIG.  7   , or in a diamond shape as shown in  FIG.  8   . In addition, phosphor members  141  may be provided in a circular shape as shown in  FIG.  9   , or in an ellipsoidal shape as shown in  FIG.  10   . That is, the phosphor members  141  may be formed in an appropriate shape to reduce a color mura. 
     In addition, the phosphor members  141  may be arranged in a regular pattern. An arrangement pattern of the phosphor members  141  may be different according to a pattern of the color mura. 
     That is, the phosphor members  141  may be arranged in a pattern according to the color mura. Here, a pattern of the color mura may be different according to an arrangement of a light source  120 , a shape of a lens  122 , and a kind of a light emitting device package  121 . 
     In addition, an area of the phosphor member  141  per unit light source may be determined according to a level of the color mura. When the area of the phosphor member  141  is excessively large, the color mura is excessively compensated and color uniformity is degraded, and when the area of the phosphor member  141  is excessively small, the color mura is insufficiently compensated and color uniformity is degraded. Therefore, the area of the phosphor member  141  may be determined according to the level of the color mura. 
     Specifically, the area of the phosphor member  141  per unit light source may be determined according to a size of the phosphor member  141  and the number of phosphor members  141 . That is, when n phosphor members  141  having a size A per the light source  120  are disposed, the area of the phosphor members  141  per the light source is A*n. 
     Therefore, the size A of the phosphor member  141  may be adjusted according to the level of the color mura, or the number of the phosphor members  141  disposed around a light source may be adjusted to determine a compensation level of the color mura. 
     As one exemplary embodiment of an arrangement pattern of phosphor members  141 , the phosphor members  141  may be arranged in a regular pattern included in a space between a light source  120  and another light source  120 . Specifically, as shown in  FIGS.  7  to  10   , the plurality of phosphor members  141  may be provided at a predetermined distance (D) from the light source  120 , and each phosphor member  141  may be arranged to have an interval having a predetermined angle ( 0 ) around the light source  120 . 
     Here, distances between the light source  120  and the phosphor members  141  may be determined according to distances between the plurality of light sources  120 . For example, the distance between the light source  120  and the phosphor member  141  may be determined in proportion to a distance between the light source  120  and the light source  120 . 
     Meanwhile although the plurality of phosphor members  141  are arranged in a circular shape in  FIGS.  7  to  10   , the arrangement of the phosphor members  141  may be different according to a shape of a light source  120 , and particularly a shape of a lens  122 . For example, when the light source  120  includes the lens  122  which has a rectangular shape, the phosphor members  141  may be arranged in a rectangular shape. 
     In addition, in  FIGS.  7  to  10   , while phosphor members  141  are radially arranged around a light source  120 , the arrangement pattern of the phosphor members  141  is not limited thereto. 
       FIG.  11    is a view for describing an arrangement pattern of phosphor members  141  according to yet another exemplary embodiment.  FIG.  12    is a view for describing a pattern of a color mura of a white light emitting device  100  in accordance with one exemplary embodiment. 
     An arrangement pattern of the plurality of phosphor members  141  may be determined according to a generation pattern of a color mura. As shown in  FIG.  1   , when light sources  120  are arranged in a lattice pattern, the color mura may also be shown in a lattice pattern as shown in  FIG.  12   . 
     Therefore, the arrangement pattern of the phosphor members  141  may also be a lattice pattern as shown in  FIG.  11   . Specifically, the plurality of phosphor members  141  are arranged in a predetermined distance and in a lattice pattern to make groups  1141 ,  1142 ,  1143 , and  1144 , and each of the groups  1141 ,  1142 ,  1143 , and  1144  may be vertically and laterally arranged around the light source  120 . 
     Here, the number of the phosphor members  141  and the size of each phosphor member  141  configuring each of the groups  1141 ,  1142 ,  1143 , and  1144  may be determined according to a level of a color mura as described above. 
     Meanwhile, as shown in  FIG.  12   , because a color mura comparatively occurs more in the edge of the white light emitting device  100  compared to the center of the white light emitting device  100 , the arrangement pattern of the phosphor members  141  on the edge of the white light emitting device  100  may be different from the other portions. 
     As described above, because a correction of the color mura is proportional to the area of the phosphor members  141  per unit light source  120 , a pattern of the phosphor members  141  may be adjusted so that the area of the phosphor members per unit light source of the edge where the color mura is severe becomes large. This will be described in more detail below with reference to  FIGS.  13  to  14   . 
       FIG.  13    is a view for describing an arrangement pattern of phosphor members on an edge of the white light emitting device  100  in accordance with one exemplary embodiment. 
     As shown in  FIG.  13   , phosphor members  141   a  corresponding to a light source  120   a  located on an edge of a white light emitting device  100  and phosphor members  141   b  corresponding to a light source  120   b  located on a center of the white light emitting device  100  have different sizes. 
     That is, the size of the phosphor member  141   a  corresponding to the light source  120   a  located on the edge may be greater than that of the phosphor member  141   b  corresponding to the light source  120   b  located on the center so that a color mura is further compensated on the edge where the color mura is comparatively severely generated. 
     Meanwhile, because the area of phosphor members per light source is influenced by the number of the phosphor members, the number of the phosphor members  141   a  corresponding to the light source  120   a  located on the edge may be greater than that of the phosphor members  141   b  corresponding to the light source  120   b  located on the center. 
       FIG.  14    is a view for describing an arrangement pattern of phosphor members on an edge of the white light emitting device  100  in accordance with another exemplary embodiment. 
     Referring to  FIG.  14   , phosphor members  141   c  corresponding to a light source  120   c  located on an edge of a white light emitting device  100  and phosphor members  141   d  corresponding to a light source  120   d  located on a center of the white light emitting device  100  may have different shapes. 
     The phosphor members  141   d  corresponding to the light source  120   d  located on the center of the white light emitting device  100  may be a circular shape, and the phosphor members  141   c  corresponding to a light source  120   c  located on the edge may be polygonal shape so that a color mura is further compensated on the edge where the color mura is comparatively severely generated. 
     Meanwhile although the phosphor members  141  are located between the light source  120  and another light source  120  in  FIGS.  1  to  14   , the dispositions of the phosphor members  141  are not limited thereto. Hereinafter, arrangement positions of the phosphor members  141  will be described. 
       FIG.  15    is a cross-sectional view for describing an arrangement position change of phosphor members of a white light emitting device in accordance with one exemplary embodiment.  FIG.  16    is a cross-sectional view for describing an arrangement position change of phosphor members of a white light emitting device in accordance with another exemplary embodiment.  FIG.  17    is a cross-sectional view for describing an arrangement position change of phosphor members of a white light emitting device in accordance with still another exemplary embodiment. 
     Referring to  FIGS.  15  to  17   , phosphor members  145  provided inside a light source  120  may convert a monochromatic light refracted and reflected inside of the light source  120  to white light. Here, the phosphor members  145  may be disposed between a light emitting device package  121  and a lens  122 . 
     More specifically, as shown in  FIGS.  15  to  17   , the phosphor members  145  may be provided on a space where the lens  122  and the light emitting device package  121  are not seated. Here, the phosphor members  145  provided inside the light source  120  may be arranged in a regular pattern. 
       FIG.  18    is a plan view of a light source for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment.  FIG.  19    is a plan view of a light source for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment.  FIG.  20    is a plan view of a light source for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment. 
     Referring to  FIGS.  2  and  18  to  20   , a light emitting device package  121  is provided inside a lens  122 . The lens  122  may be fixed on a circuit board  110  by a supporter  127  disposed in an angle of 120 degrees. 
     Phosphor members  145  are provided in a space between the lens  122  and the light emitting device package  121 . As shown in  FIGS.  18  to  20   , the phosphor members  145  may be arranged in spaces between supporters  127 . 
     As described above, because the compensation of a color mura is proportional to the area of the phosphor members  145  per unit light source  120 , the area of the phosphor member  145  and the number of the phosphor members  145  existing inside the light source  120  may be different according to the compensation of the color mura. 
       FIG.  21    is a view for describing an arrangement pattern of phosphor members according to yet another exemplary embodiment. 
     As shown in  FIG.  21   , a compensator may include first phosphor members  141  provided between the light source  120  and another light source, and second phosphor members  145  existing inside the light source  120 . 
     Shapes and sizes of the first phosphor member  141  and the second phosphor member  145  may be determined according to a level of a color mura as described above. Here, the first phosphor members  141  and the second phosphor members  145  may have different shapes. For example, the first phosphor members  141  may be provided in a circular shape, and the second phosphor members  145  may be provided in a fan shape in which an inside thereof is cut. In addition, the first phosphor members  141  and the second phosphor members  145  may have different sizes. 
     In addition, the first phosphor members  141  and the second phosphor members  145  may also have different arrangement patterns. For example, the first phosphor members  141  may be disposed in an angle of 30 degrees and in a circular shape, the second phosphor members  145  may be disposed in an angle of 120 degrees. 
       FIG.  22    is an exploded perspective view of a display device in accordance with one exemplary embodiment.  FIG.  23    is an exploded perspective view of a display device in accordance with another exemplary embodiment. 
     Referring to  FIGS.  22  and  23   , a display device  200  in accordance with one exemplary embodiment includes a frame  210 , a liquid crystal panel  220 , an optical part  235 , a diffusion plate  240 , and a white light emitting device  100 . 
     The frame  210  accommodates the liquid crystal panel  220 , the optical part  235 , and the white light emitting device  100 . The frame  210  may have a square frame shape, and may be formed of a plastic or reinforced plastic. 
     A chassis which surrounds the frame  210  and supports a backlight assembly may be disposed under or on sides of the frame  210  to improve the durability and the fire resistance of the frame  210 . 
     The liquid crystal panel  220  may adjust an arrangement of a liquid crystal layer which refracts white light incident from a white light emitting unit in different patterns to generate an image to be displayed to a user. To this end, the liquid crystal panel  220  may further include a thin plate transistor substrate  221  and a color display substrate  222  in which a liquid crystal layer is provided between the thin film transistor substrate  221  and the color display substrate  222 . 
     The thin plate transistor substrate  221  and the color display substrate  222  may be spaced a certain distance from each other. A color filter and a black mattress may be provided on the color display substrate  222 . A driver  223  configured to transmit a driving signal to the thin film transistor substrate  221  may be installed on the thin film transistor substrate  221 . The driver  223  may include a first substrate  224 , a driving chip  225  connected to the first substrate  224 , a second substrate  226  on which the driving chip  225  is installed. The second substrate  226  in accordance with an exemplary embodiment may be a printed circuit board or a flexible printed circuit board (FPCB)  110 . 
     In addition to the liquid crystal panel  220  described above, various panels which may be considered by those skilled in the art may be one exemplary embodiment of the liquid crystal panels  220 . 
     As desired, in the liquid crystal panel  220 , a touch panel which includes a polyester film, glass, and the like may be installed to sense a touch operation or a polaroid film may be further installed to polarize light transmitted to the outside through the liquid crystal panel  220 . 
     The optical part  235  is provided between the liquid crystal panel  220  and the white light emitting device  100 . The optical part  235  diffuses and collects white light guided by the diffusion plate  240  and transmits the white light to the liquid crystal panel  220 . 
     The optical part  235  may include a diffusion sheet  233  and prism sheets  231  and  232 . The diffusion sheet  233  serves to diffuse light emitted by the diffusion plate  240 , and the prism sheets  231  and  232  serve to collect the light diffused by the diffusion sheet  233  to supply the uniform light to the liquid crystal panel  220 . 
     The diffusion sheet  233  diffuses and outputs incident light. Further uniform white light may be provided to the liquid crystal panel  220  by the diffusion sheet  233 . The diffusion sheet  233  may be omitted or configured with a plurality of sheets as desired. 
     The prism sheets  231  and  232  may include a first prism sheet  231  and a second prism sheet  232  in which prisms vertically intersect in x and y axes directions. When the prism sheets  231  and  232  refract light from x and y axes directions, the linearity of the light may be improved. 
     The diffusion plate  240  diffuses and outputs white light emitted by the white light emitting device  100 . That is, the white light emitted by the white light emitting device  100  is further diffused while passing through the diffusion plate  240 . Therefore, the white light may be diffused to further improve brightness uniformity. 
     Specifically, the diffusion plate  240  may be provided in a plate shape. For example, the diffusion plate  240  may be implemented with a translucent acrylic plate having a 1˜2.5 mm thickness, and serve to uniformly diffuse the white light emitted by the white light emitting device  100 . 
     The white light emitting device  100  described above may be applied to a display device  200 . The white light emitting device  100  may provide a backlight to the liquid crystal panel  220  described above. 
     Specifically, as described above, the white light emitting device  100  may include a circuit board  110 , a plurality of light sources  120 , which each emit a monochromatic light ML, mounted on the circuit board  110 , a light converter  130  converting the monochromatic light to white light, and a compensator  140  provided between the plurality of light sources  120  in order to reduce a color mura. 
     The light sources  120  may be provided in a package type and the plurality of light sources  120  may be mounted on the circuit board  110 . In  FIGS.  22  and  23   , although the light sources  120  are arranged in a lattice pattern, an arrangement pattern of the light sources may be changed in various shapes as desired. 
     Here, the light source  120  generates and emits a monochromatic light. For example, the light source  120  may emit blue light generated by a blue LED. Here, blue light generated by a blue LED may be emitted in a wide beam angle through the lens ( 122  of  FIG.  2   ) described above. 
     A monochromatic light emitted by the light source  120  is converted to white light while passing through the light converter  130 . To this end, the light converter  130  may include a phosphor. For example, the light converter  130  may include a yellow light emitting phosphor having a complementary color of blue light. In addition, the light converter  130  may include a light phosphor and a green light emitting phosphor instead of a yellow light emitting phosphor to generate white light. 
     White light transmitted by the light converter  130  reaches the liquid crystal panel  220  passing through the diffusion plate  240  and the optical part  235 . Therefore, the liquid crystal panel  220  uses white light provided by the white light emitting device  100  as a backlight to display a predetermined image. 
     Here, the refraction, reflection, and diffraction of light may occur inside the display device  200  and the white light emitting device  100 . Therefore, a color mura may occur in white light emitted by the white light emitting device  100  according to a change of a light path. 
     Thus, the compensator  140  may be located between the circuit board  110  and the light converter  130 , and convert a monochromatic light, which is refracted, reflected, and rotated, to white light to compensate the color mura. 
     As described above, the compensator  140  may include phosphor members  141  which may be arranged in various patterns of shapes. The phosphor members  141  may include a phosphor. The phosphor members  141  convert part of the monochromatic light incident to the compensator  140  to output the white light. 
     The phosphor included in the phosphor member  141  may be the same as the phosphor of the light converter  130  described above. For example, the phosphor members  141  may include a yellow light emitting phosphor having a complementary color of blue light. In addition, the phosphor members  141  may include a light phosphor and a green light emitting phosphor instead of a yellow light emitting phosphor to generate white light. 
     As described above, the phosphor members  141  may be provided between the light source  120  and the light source  120 , but also provided inside the light source  120 . In addition, the phosphor members  141  may be provided both inside and between the light sources  120 . 
     In addition, an arrangement pattern of the phosphor members  141  may be different according to a generation pattern of a color mura as described above. 
     In addition, because a level of the color mura may be more severe on an edge of a display part compared to a center of a display part, a pattern of the phosphor members  141  of the edge of the display part and a pattern of the phosphor members  141  of the center of the display part display may be different from each other. 
     In addition, a shape and a size of the respective phosphor members  141  may be determined according to the level of the color mura, and the compensator  140  may include the plurality of phosphor members  141  having different shapes. 
     Here, as shown in  FIG.  22   , the compensator  140  may be provided in a compensation sheet shape or a compensation film shape including the phosphor members  141 , and be formed by bonding the compensation sheet or the compensation film to the circuit board  110 . 
     In addition, as shown in  FIG.  23    a compensator  140  in accordance with another exemplary embodiment may be directly formed on a circuit board  110 . Specifically, the compensator  140  may be formed by a method of coating phosphor members  141  in a regular pattern onto the circuit board  110 , or a method of depositing the phosphor members  141  in a regular pattern on the circuit board  110 . 
     In addition, the compensator  140  may be formed by a method of directly printing the phosphor member  141  on the circuit board  110 . Specifically, the compensator  140  may be formed by a method of mixing a phosphor with an adhesive configured to fix the phosphor to the circuit board  110  in order to form a phosphor ink, and directly printing the phosphor ink formed on the circuit board  110  to form the phosphor members  141 . 
     In addition, as shown in  FIGS.  5  and  6   , a white light emitting device  100  may further include a reflector  150 . The reflector  150  may be stacked on a circuit board  110 , and reflect light emitted by a light source  120  toward a light converter  130  to increase the utilization rate of the light source  120 . Here, the reflector  150  may be provided in a reflective sheet or reflective film type. 
     When the reflector  150  is provided in the reflective sheet or reflective film type, a compensator  140  may be directly formed on a reflective sheet or film. 
     Specifically, the compensator  140  may be formed by a method of coating phosphor members  141  in a regular pattern onto the reflective sheet or the reflective film, or a method of depositing the phosphor members  141  in a regular pattern on the reflective sheet or the reflective film. 
     In addition, the compensator  140  may be formed by a method of directly printing the phosphor members  141  on the reflective sheet or the reflective film. The compensator  140  may be formed by a method of mixing a phosphor with an adhesive configured to fix the phosphor to the reflective sheet or the reflective film to form a phosphor ink, and directly printing the phosphor ink formed on the reflective sheet or the reflective film to form the phosphor members  141 . Here, the phosphor members  141  may be formed in a regular pattern. 
     Hereinafter, a white LED including a plurality of light source modules will be specifically described in accordance with accompanying drawings. The same numerals are generally assigned to components which are the same as that of the exemplary embodiments described above, and a specific description thereof will be omitted. 
       FIG.  24    is a schematic exploded perspective view of a white light emitting device including a plurality of light source modules,  FIG.  25    is a schematic perspective view for describing a light source module,  FIG.  26    is a cross-sectional view of a white light emitting device, and  FIG.  27    is a cross-sectional view of a white light emitting device which further includes a coated layer. 
     Referring to  FIG.  24   , a white light emitting device includes a base, a plurality of light source modules  320  emitting a monochromatic light, and a light converter  130  converting the monochromatic light emitted from the plurality of light source modules  320  to white light. 
     The light source modules  320  are coupled on the base  310 . The base  310  may be formed of a plastic or a reinforced plastic, but it is not limited thereto. 
     In addition, the base  310  may be omitted as desired, or be replaced with a different component. For example, the frame  210  illustrated in  FIG.  22    may become the base  310 . That is, the plurality of light source modules  320  may be coupled to the frame  210 . 
     In addition, a reflective member is provided on a surface of the base  310  to reflect a monochromatic light incident through the light source module  320  toward the light converter  130 . 
     The light converter  130  converts a monochromatic light to white light. The light converter  130  is spaced a certain distance from the light source module  320 , converts a monochromatic light emitted from the light source module  320  to white light, and emits the white light forward. To this end, the light converter  130  may include a phosphor which converts a wavelength of an incident monochromatic light and emits a monochromatic light having a different color. 
     The plurality of light source modules  320  may be spaced a certain distance D 1  from each other. At this time, distances between the light source modules  320  may be the same, but the distances between the light source modules  320  may be different from each other when it is required. For example, a distance between a second light source module  320 - 2  and a third light source module  320 - 3  may be smaller than that of a first light source module  320 - 1  and the second light source module  320 - 2 , but it is not limited thereto. 
     Referring to  FIGS.  25  and  26   , the light source module  320 _ 1  includes a circuit board  110 , compensators  140 , and a plurality of light sources  120 . 
     The plurality of light sources  120  are mounted on the circuit board  110 . The circuit board  110  may be provided in a long bar shape. 
     The length L of the circuit board  110  may be determined to correspond to the length of the white light emitting device  300 , the width W 1  of the circuit board  110  may be determined to correspond to the width of the light source  120 . Specifically, as illustrated in  FIG.  25   , the width W 1  of the circuit board  110  may be greater than the width W 2  of the light source  120 , but is not limited thereto, and may have a width in which a light emitting device package of the light source  120  may be mounted. 
     The plurality of light sources  120  are mounted on the circuit board  110  with a certain interval, and emit a monochromatic light. The intervals between the plurality of light sources  120  may be the same, but the plurality of light sources  120  may be also disposed with the intervals different from each other. 
     The compensator  140  is provided between the light converter  130  and the circuit board  110  to improve the color uniformity of the white light emitting device  300 . Specifically, the compensator  140  converts an incident monochromatic light to white light and output the white light to reduce a color mura of the white light emitting device  300 . 
     The compensator  140  may include a plurality of phosphor members  141  which convert an incident monochromatic light to white light and output the white light. At this time, the phosphor member  141  may include a phosphor which is formed of at least one phosphor material and converts a wavelength of an incident monochromatic light. Phosphor material forming the phosphor member  141  may be determined according to a monochromatic light incident from the light source  120 . 
     The compensator  140  may be provided by a method of forming the plurality of phosphor members  141  on the circuit board  110 . Specifically, the compensator  140  may be formed by a method of coating the phosphor members  141  in a regular pattern on the circuit board  110 , or a method of depositing the phosphors members  141  in a regular pattern on the circuit board  110 . 
     In addition, the compensator  140  may be also formed by a method of directly printing the phosphor member  141  on the circuit board  110 . Specifically, the compensator  140  may be formed by a method of mixing a phosphor with an adhesive for fixing the phosphor to the circuit board  110  to form a phosphor ink, and directly printing the formed phosphor ink on the circuit board  110  to form the phosphor member  141 . 
     The phosphor member  141  may be provided inside or outside the light source  120 , but the position of the phosphor member  141  is not limited thereto. For example, as described above, the phosphor member  141  may be formed inside the light source  120  or outside the light source  120  as described above, or may be formed inside and outside the light source  120 . 
     The phosphor member  141  may be formed in a various shapes. For example, as illustrated in  FIG.  25   , the phosphor member  141  may be formed in a rectangular shape. At this time, the length of the phosphor member  141  may correspond to the width D 2  of the light source  120  or the width D 1  of the circuit board  110 , but it is not limited thereto. 
     The plurality of phosphor members  141  may be formed to have a certain pattern. For example, as illustrated in  FIG.  25   , the phosphor member  141  may be formed to have a certain interval in a longitudinal direction of the light source module  320 - 1 , but the pattern of the phosphor member  141  is not limited thereto. 
     Meanwhile, as illustrated in  FIG.  27   , the white light emitting device  300  may further include a coated layer  330  which is transparent. The coated layer  330  may be stacked on the circuit board  110 , in which the phosphor member  141  is formed, to prevent the phosphor member  141  and the circuit board  110  from being damaged. 
       FIG.  28    is an exploded perspective view of a white light emitting device which further includes a reflector, and  FIG.  29    is a cross-sectional view of a white light emitting device which further includes a reflector. 
     Referring to  FIGS.  28  and  29   , the white light emitting device  300  including the plurality of light source modules  320  may further include a reflector  340 . 
     The reflector  340  may be stacked on the plurality of light source modules  320 , and reflect light emitted from the light source  120  toward the light converter  130  to increase a use rate of the light source  120 . At this time, the reflector  340  may be provided in a reflective sheet or a reflective film type. 
     The reflector  340  may be provided by a method of stacking on the light source module  320  on which the light sources  120  are mounted. To this end, the reflector  340  may include a plurality of openings formed to correspond to the plurality of light sources  120 . The diameter of the openings formed in the reflector  340  may be greater than that of the light source  120 . 
     As described above, because the reflector  340  is provided by a method of stacking on the light source module  320  on which the light source  120  is mounted, the reparability of the light source  120  may be improved. 
     As is apparent from the above description, the color uniformity of a white light emitting device can be improved by converting a monochromatic light, which is reflected and refracted inside of the white light emitting device, to white light. 
     In addition, a color mura can be effectively compensated by determining an arrangement of phosphor members according to a pattern of the color mura of the white light emitting device. 
     Although a few exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the scope as defined in the following claims and their equivalents.