KR20110129619A - Light emitting apparatus - Google Patents

Abstract

PURPOSE: A light emitting device is provided to array by alternating a light emitting module of a segment type and to change the length of the light emitting module. CONSTITUTION: A plurality of light emitting module(30A,30B,30C,30D) is arranged on a plate. A plurality of light emitting modules is electrically connected each other. A connector substrate(50) supplies a power source to a first light emitting module among a plurality of light emitting modules. A feedback board(52) feeds back a termination circuit of a final n-light emitting module among a plurality of light emitting modules. One or more first light-emitting device is loaded on a board. A line pattern interlinks a first emitting element and a second emitting element in a row by being connected to a partial terminal of first and second contact terminals and the first and second emitting elements.

Description

Light emitting device {LIGHT EMITTING APPARATUS}

An embodiment relates to a light emitting device.

Light emitting diodes (LEDs) are semiconductor light emitting devices that convert current into light. Recently, the light emitting diode is gradually increasing in brightness, and is being used as a light source for a display, an automotive light source, and an illumination light source. A light emitting diode that emits white light having high efficiency by using a fluorescent material or by combining various color light emitting diodes. It is also possible to implement.

Such a light emitting diode is mounted on a board and provided in a modular form, and the light emitting modules are used as light sources emitting various colors, and in particular, they are applied as light sources in display fields and lighting fixtures.

The embodiment provides a light emitting device with free pitch adjustment.

The embodiment provides a light emitting device capable of replacing a segment type light emitting module or changing the length of the light emitting module.

The light emitting device according to the embodiment, the plate; A plurality of light emitting modules disposed on the plate and electrically connected to each other; A connector board supplying power to a first first light emitting module of the plurality of light emitting modules; And a feedback substrate for feeding back a termination circuit of the last nth light emitting module (n ≧ 2 or more natural numbers) of the plurality of light emitting modules.

Each of the light emitting modules includes a board; At least one first light emitting device mounted on the board; At least one second light emitting device mounted on the board; A first connector having a plurality of terminals for inputting and outputting power to one side of the board; A second connector having a plurality of terminals for inputting and outputting power to the other side of the board; And a line pattern connected to the first and second light emitting devices and some terminals of the first and second connection parts to connect the first and second light emitting devices in parallel.

According to the embodiment, a segment type light emitting module may be arrayed, thereby making the manufacturing process convenient.

The embodiment is convenient to replace the segment type light emitting module.

The embodiment has the effect of adjusting the length of the segment type light emitting module in units of segments.

1 is a view showing a light emitting module according to a first embodiment.
2 is a diagram illustrating an example in which the light emitting modules of FIG. 1 are arrayed.
3 is a circuit diagram of FIG. 2.
FIG. 4 is a modified example of the light emitting module of FIG. 1.
5 is a view showing a light emitting module according to a second embodiment.
6 is a diagram illustrating an example in which the light emitting modules of FIG. 5 are arrayed.
FIG. 7 is a diagram illustrating a display device including the light emitting module array of FIG. 2.

In the description of the embodiments, each layer, region, pattern, or structure is formed “on” or “under” a substrate, each layer (film), region, pad, or pattern. In the case where it is described as, “on” and “under” include both “directly” or “indirectly” formed through another layer. In addition, the criteria for the top or bottom of each layer will be described with reference to the drawings.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not entirely reflect the actual size.

Hereinafter, light emitting devices according to embodiments will be described in detail with reference to the accompanying drawings.

1 is a view illustrating a light emitting module according to a first embodiment, and FIG. 2 is a view in which the light emitting module of FIG. 1 is arrayed.

Referring to FIG. 1, the light emitting module 30 is a segment module, and the width D1 may be manufactured in standard inches having a predetermined length, and the standard inches may be manufactured in units of 1 inch or 2 inches.

The light emitting module 30 includes a board 20 and at least two (N ≧ 2), for example, four light emitting elements 11, 12, 13, and 14 arranged on the board 20.

The board 20 may be a printed circuit board (PCB) made of a resin material including a circuit pattern. However, the board 133 may include not only a general PCB but also a metal core PCB (MCPCB, Metal Core PCB), a flexible PCB (FPCB, Flexible PCB), a ceramic substrate, and the like, but is not limited thereto. The width D1 of the light emitting module 30 is substantially the same as the width of the board 20.

The board 20 includes a first connecting portion 21 and a second connecting portion 22, and the first connecting portion 21 exposes a plurality of terminals P1 to P4 exposed on one side of the bottom surface of the board 20. The second connection part 22 includes a plurality of terminals P5 to P8 exposed on the other side of the upper surface of the board 20.

An area in which the first connector 21 and the second connector 22 are disposed in the board 20 is spaced apart from an area in which the light emitting devices 11, 12, 13, and 14 are arranged. The first connecting portion 21 is disposed in parallel to each other on the bottom side of the board 20, the second connecting portion 22 is disposed in parallel to each other on the top side of the board (20). The first connector 21 protrudes from the board 20 by a predetermined gap G1 for connection with another board or another connector board. The first connecting portion 21 protrudes in a direction opposite to the direction in which the second connecting portion 22 is disposed.

The first connector 21 and the second connector 22 include a plurality of terminals, for example, four terminals P1 to P4 (P5 to P8), and the number of the terminals P1 to P8 is a light emitting device. It can be changed depending on the number or driving method of.

The first terminal P1 and the second terminal P2 of the first connecting portion 21 are connected to the first and second light emitting elements 11 and 12 in a line pattern L1, respectively, and the third terminal P3. ) And the fourth terminal P4 are respectively connected to the seventh and eighth terminals P7 and P8 of the second connecting portion 22 by the line pattern L4 and used as feedback terminals.

The first light emitting device 11 and the third light emitting device 13 are connected in series, and the second light emitting device 12 and the fourth light emitting device 14 are connected in series, and the first and third light emitting devices 12 are connected in series. The light emitting elements 11 and 13 may be connected in parallel with the second and fourth light emitting elements 12 and 14.

The fifth and sixth terminals P5 and P6 of the second connector 22 are connected to the third and fourth light emitting elements 13 and 14 by line patterns L3, respectively.

The first connector 21 is electrically connected to the second connector 22 of the other light emitting module, and the second connector 22 is electrically connected to the first connector 21 of the other light emitting module.

By connecting the first and third light emitting elements 11 and 13 and the second and fourth light emitting elements 12 and 14 in parallel, even if the first and third light emitting elements 11 and 13 receive an error, The second and fourth light emitting devices 12 and 14 may operate normally. The light emitting modules 30 may be arrayed as shown in FIG. 2 with a width D1 of a predetermined inch unit.

The light emitting devices 11, 12, 13, and 14 may be arranged in at least one column or two columns, and the emitted light may be a wavelength in a visible light band such as white, red, green, blue, etc., or a wavelength in an ultraviolet (UV) band. Can emit. The plurality of light emitting devices may emit light of the same wavelength band or different wavelength bands.

The light emitting devices 11, 12, 13, and 14 may be provided in a package form, or a light emitting device chip may be packaged on the board 20, but the present invention is not limited thereto.

Referring to FIG. 2, in the light emitting module array, a plurality of light emitting modules 30A to 30D are sequentially arrayed, and one side of the first light emitting module 30A disposed first overlaps one side of the connector substrate 50. The other side of the first light emitting module 30A is disposed below one side of the second light emitting module 30B, and the one side of the second light emitting module 30B is disposed below the other side of the third light emitting module 30C. In this connection method, boundary portions of adjacent light emitting modules may partially overlap. The second connector 22 and the first connector 21 disposed between the adjacent light emitting modules overlap each other, and the terminals are bonded to each other in the overlapped area.

The plurality of light emitting modules 30A to 30D are adhered to an upper surface of the plate 131, and the plate 131 may include a heat dissipation member such as a metal plate, a support member, or a metal PCB, but is not limited thereto. .

The connector board 50 may include one or more first polarity power terminals E1 and one or more second polarity power terminals E2 and E3, and the first power terminal E1 may include a first light emitting module. It is connected to the first and second terminals P1 and P2 disposed at the first connection portion 21 of 30A to supply the first polarity power, and the second and third power supply terminals E2 and E3 are the same. It is connected to the third and fourth terminals P3 and P4 disposed at the first connecting portion 21 of the first light emitting module 30A to provide a second polarity power source.

The number of the first power terminals E1 and the second power terminals E2 and E3 of the connector board 50 may be parallel to the light emitting elements 11, 12, 13, and 14 of the light emitting modules 30A to 30D. It may vary depending on the circuit, but is not limited thereto. Here, the widths of the light emitting modules 30A to 30D may be the same widths.

The first connection portion 21 of the first light emitting module 30A is mounted on the connector board 50 and electrically connected thereto, and the second connection portion 22 of the first light emitting module 30A is the second light emission. It overlaps and mounts under the 1st connection part 21 of the module 30B.

The feedback substrate 52 is disposed on the second connection portion 22 of the fourth light emitting module 30D, which is the last module, and the feedback substrate 52 has a first loop pattern 53 and a second loop pattern. And the first loop pattern 53 connects the fifth terminal P5 and the eighth terminal P8 to each other, and the second loop pattern 54 includes the sixth terminal P6. ) And the 7th terminal (P7). When there are a plurality of connector boards 50, the feedback board 52 may be removed.

Power supplied to the first and second terminals P1 and P2 of the first connection unit 21 of the first light emitting module 30A drives the first to fourth light emitting devices 11 to 14, The first and second terminals P1 and P2 of the second light emitting module 30B are moved through the fifth and sixth terminals P5 and P6 of the second connection unit 22. Accordingly, power can be supplied to the light emitting elements 11, 12, 13, and 14 of all the light emitting modules 30A, 30B, 30C, and 30D, so that each of the light emitting elements 11, 12, 13, and 14 may be driven. have.

The power applied to the fifth and sixth terminals P5 and P6 of the fourth light emitting module 30D is transmitted through the seventh and eighth terminals P7 and P8 by the feedback substrate 52 and is again the first. A path fed back to the seventh and eighth terminals P7 and P8 of the second connecting portion 22 of the third light emitting module 30C via the third and fourth terminals P3 and P4 of the connecting portion 21. Will move. The second and third power supply terminals E2 and E3 of the connector board 50 connected to the third and fourth terminals P3 and P4 of the first light emitting module 30A may flow.

3 is a circuit diagram illustrating the light emitting diodes of FIG. 2, wherein the plurality of first light emitting device arrays connected in series are driven by a first power supply terminal E1 and a second power supply terminal E2, and are connected in series. The second light emitting element array is driven by the first power supply terminal E1 and the third power supply terminal E3. Substantially parallel driving circuits can be provided.

4 is a modified example of the connection method of the first and second light emitting modules.

Referring to FIG. 4, the first light emitting module 31 and the second light emitting module 32 may be connected to each other through the intermediate connector board 40 even without protruding from the first connector 21.

Terminals P1 to P4 (P5 to P8) of the first and second connectors 21 and 22 are exposed to the upper surface (or lower surface) of the board, and the intermediate connector board 40 is connected to the first and second connectors. Terminals P1 to P4 (P5 to P8) of (21, 22) are exposed on the opposite side of the exposed surface, for example, on the lower surface (or upper surface). The terminals P15, P16, P17, and P18 of the intermediate connector board 40 are the same as the terminals P1 to P4 of the first connecting portion 21 or the terminals P5 to P8 of the second connecting portion 22. It may be a number.

An intermediate connector board 40 is disposed on the second connector 22 of the first light emitting module 31 and the first connector 21 of the second light emitting module 32, and the intermediate connector board 40 is disposed on the second connector 22. The second connection unit 22 of the first light emitting module 31 and the first connection unit 21 of the second light emitting module 32 may be connected to each other, and may provide a power supply path and a power feedback path. .

5 is a view showing a light emitting module according to a second embodiment.

Referring to FIG. 5, the light emitting module 35 includes first and second lead patterns 25 and 26 having predetermined lengths parallel to each other on the board 20, and the first and second lead patterns. And third and fourth lead patterns 27, 28 spaced apart from (25, 26) and parallel to each other.

At least one first light emitting device 11 is disposed on the first and second lead patterns 25 and 26, and at least one second light emitting device is disposed on the third and fourth lead patterns 27 and 28. (12) can be arranged.

The interval between the first light emitting device 11 and the second light emitting device 12 may be adjusted according to the length of the first lead pattern 25 and the third lead pattern 27. For example, an interval between the first light emitting element 11 and the second light emitting element 12 may be changed from T1 to T2, and this gap may vary depending on the length of the lead pattern and the gap between the lead patterns. By controlling the pitch between the light emitting devices 11 and 12, the number or brightness of the light emitting devices may be adjusted.

The lengths of the first and second lead patterns 25 and 26 correspond to the lengths of the third and fourth lead patterns 26 and 27, and may be formed in one region based on the center position of the board 20. Can be. The first and second lead patterns 25 and 26 may be disposed in, for example, an up / down direction of the board, and the first lead pattern 25 and the third lead pattern 27 may be, for example, left / right of the board. It may be arranged in the right direction. The length direction of each lead pattern 25 to 28 may be an array direction of the light emitting devices.

The lengths of the first and second lead patterns 25 and 26 may be formed at least two times longer than the mounting area of the first light emitting device 11 (ie, the width of the light emitting device). The distance T3 between the light emitting devices of the adjacent light emitting modules 35B and 35C may be the same as or different from T1.

In the light emitting module 35, the first terminal P1 of the first connector 21 is connected to the first lead pattern 11, and the second terminal P2 is connected to the third lead pattern 13. The fifth terminal P5 of the second connector 22 is connected to the second lead pattern 12, and the fourth terminal P4 is connected to the fourth lead pattern 14. Through this connection method, the first light emitting device 11 and the second light emitting device 12 that are adjacently arranged may be arranged in parallel with each other.

Referring to FIG. 6, the light emitting module of FIG. 5 is arranged.

Referring to FIG. 6, the light emitting module array may be arranged by connecting at least two light emitting modules. For example, the light emitting module array will be described as an example in which four light emitting modules 35A, 35B, 35C, and 35D are arranged.

The light emitting module array may be configured by arranging a plurality of light emitting modules 35: 35A, 35B, 35C, and 35D as shown in FIG. 5 on the plate 131. The first light emitting module to the fourth light emitting module 35A, 35B, 35C, and 35D are sequentially arranged and bonded on the plate 131, and the connector board 139 is connected to one side of the first light emitting module 35A. Then, the feedback substrate 52 is connected to the last fourth light emitting module 35D, thereby forming an overall module circuit.

In the light emitting module array, the distance T1 between the first light emitting element 11 and the second light emitting element 12 of each light emitting module 35A, 35B, 35C, or 35D may be widened or narrowed. It can be adjusted by changing to a light emitting module having a light emitting device having a. In addition, the length of the light emitting module array may be adjusted using the segment type light emitting modules 35A, 35B, 35C, and 35D.

<Display device>

7 is a perspective view illustrating a display device including a light emitting module according to an embodiment.

Referring to FIG. 7, the display device 100 includes a bottom cover 111 having an accommodating part 112, a light guide plate 141 disposed in the bottom cover 111, and at least one side surface of the light guide plate 141. A light emitting module array 130 disposed on the light guide plate 141, a reflective sheet 122 under the light guide plate 141, an optical sheet 151 on the light guide plate 141, and a display panel 161 on the optical sheet 141. It may include.

The light emitting module array 130 may include a structure in which a plurality of light emitting modules 30 are disposed on the plate 131, and may correspond to one side, two sides, or all sides of the light guide plate 141. It does not limit to this.

The light unit 150 may include a bottom cover 111, a light emitting module array 130, a reflective sheet 122, a light guide plate 141, and an optical sheet 151.

The light unit 150 is a site view type (side type), and the side view type is compared to the number of light emitting diodes used in the top view type (or direct type) in which light emitting elements are arranged on the entire bottom surface of the bottom cover. It uses a much smaller number of light emitting devices and can be provided lighter and thinner than the top view method. The side view type may be classified into a one edge type, a two edge type, and a four edge type.

The bottom cover 111 may be formed of a metallic material or a resin material such as aluminum or stainless steel, and may be manufactured using a process such as press molding or extrusion molding. In addition, the bottom cover 111 may include a metal or non-metal material having good thermal conductivity, but is not limited thereto.

The bottom cover 111 may include a box shape in which at least one surface is open, and at least two side covers of the circumferential surface may protrude in a direction perpendicular to the bottom surface. The bottom surface of the bottom cover 111 and its circumferential cover may be integrally formed or separately coupled, but are not limited thereto. The bottom cover 111 may include an accommodating part 112, and a cover may be disposed on at least one side of the circumferential surface thereof. The bottom cover 111 is combined with the top cover to support the entire display device.

The light guide plate 141 serves to make the incident light into a surface light source. Light may be incident on the light guide plate 141 through a lower surface and / or a side surface, and the embodiment will be described as an example in which light is incident on opposite sides of the light guide plate 141.

The light guide plate 141 is made of a light-transmissive material, for example, acrylic resin-based, such as PMMA (polymethyl metaacrylate), PET (polyethylene terephthlate), PC (poly carbonate), COC (cycloolefin copolymer) and PEN (polyethylene naphthalate) It may include one of the resins.

The light guide plate 141 is formed in a rectangular plate shape having a predetermined thickness, and the horizontal length and the vertical length may be the same or different. The thickness may vary depending on the incident region of the light emitting device or the size of the display panel.

A side surface of the light guide plate 141 may be provided with a predetermined pattern, for example, a concave-convex structure such as a scratch in an incident region of light, in order to improve light incident efficiency, but is not limited thereto. The incident region of the light is a corresponding region of the light emitting module 30, and the size of the region may vary according to the light directing angle of the light emitting device mounted in the light emitting module and the distance between the light emitting device and the light guide plate 141. The uneven structure may be formed in a direction parallel to or perpendicular to an upper surface of the light guide plate 141.

A reflective pattern may be formed on the lower surface and / or the upper surface of the light guide plate 141, and the reflective pattern may be substantially formed on the bottom surface of the light guide plate 141, and the light reflected by the reflective pattern may be formed on the light guide plate 141. It may proceed to the upper surface of.

The side from which light is incident on the light guide plate 141 may be formed as a surface perpendicular to the top surface of the light guide plate 141, or may be formed as a surface inclined with respect to the top surface of the light guide plate 141.

In the light emitting module array 130, a plurality of light emitting modules 30 are disposed on a plate 131, and the plurality of light emitting modules 30 are arranged to be arranged along side surfaces of the light guide plate 141, and electrically connected to each other. Connected. The light emitting devices mounted on the plurality of light emitting modules 30 may be driven in a parallel manner, but are not limited thereto. In addition, in order to change the distribution of incident light from the side surface of the light guide plate 30, the pitch between the light emitting devices may be adjusted using the light emitting module as shown in FIG. 6.

In addition, the number of light emitting modules may be changed in the width D3 of the light guide plate applied to a specific product by increasing or removing the light emitting modules for each segment type as shown in FIG. 2 or 6.

The light emitting devices of the light emitting module 130 may emit wavelengths in the visible light band or wavelength in the ultraviolet (UV) band such as white, red, green, and blue. The plurality of light emitting devices may emit light of the same wavelength band or different wavelength bands.

The reflective sheet 122 may be disposed under the light guide plate 141. The reflective sheet 122 may improve the luminance of the light unit 150 by reflecting the light incident on the lower surface of the light guide plate 141 upward. The reflective sheet 122 may be formed of, for example, PET, PC, or PVC resin, and a high reflective material such as Ag, Al, or the like may be coated on the surface thereof, but is not limited thereto.

The reflective sheet 122 may be an upper surface of the bottom cover 111, which may be used as a reflective layer by coating Ag, Al, etc. on the upper cover 111, and the reflective sheet 122 may be removed. Can be.

The reflective sheet 122 may extend to the bottom of the light emitting module 30, but is not limited thereto.

The optical sheet 151 is disposed between the display panel 161 and the light guide plate 141. The optical sheet 151 may include at least one light transmissive sheet, and may include at least one of a sheet such as a diffusion sheet, a horizontal prism sheet, a vertical prism sheet, and a brightness enhancement sheet. The diffusion sheet diffuses the incident light, the horizontal and / or vertical prism sheet focuses the incident light into the display area, and the brightness enhancement sheet reuses the lost light to improve the brightness.

Here, the light guide plate 141 and the optical sheet 151 may be included as optical members on the optical path of the light emitting module 30, but the present invention is not limited thereto.

The light guide plate 141, the light emitting module array 130, and the reflective sheet 122 may be accommodated in the accommodating part 112 of the bottom cover 111.

The display panel 161 is, for example, a liquid crystal display (LCD) panel and includes first and second substrates of transparent materials facing each other, and a liquid crystal layer interposed between the first and second substrates. A polarizer may be attached to at least one surface of the display panel 161, but the polarizer is not limited thereto. In addition, a protective sheet may be disposed on the display panel 161, but is not limited thereto.

The display panel 161 displays information by light passing through the optical sheet 151. The display device 100 may be applied to various portable terminals, monitors of notebook computers, monitors of laptop computers, televisions, and the like.

The light emitting device array according to the embodiment may be applied to a light unit or a lighting device of a direct type.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

In addition, the above description has been made with reference to the embodiment, which is merely an example, and is not intended to limit the present invention. Those skilled in the art to which the present invention pertains will be illustrated as above without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

30, 30A to 30D, 31, 32, 35, 35A to 35D: light emitting module, 20: board, 21, 22: connection portion, P1 to P8: terminal, 11 to 14: light emitting element, 50: connector board, 52: feedback Board | substrate, 40: intermediate connector board | substrate, 111: bottom cover, 122: reflective sheet, 131: plate, 130: light emitting element array, 141: light guide plate, 151: optical sheet, 161: display panel

Claims (11)

plate;
A plurality of light emitting modules disposed on the plate and electrically connected to each other;
A connector board supplying power to a first first light emitting module of the plurality of light emitting modules; And
A feedback substrate for feeding back a termination circuit of the last nth light emitting module (n ≧ 2 or more natural numbers) of the plurality of light emitting modules;
Each of the light emitting modules includes a board; At least one first light emitting device mounted on the board; At least one second light emitting device mounted on the board; A first connector having a plurality of terminals for inputting and outputting power to one side of the board; A second connector having a plurality of terminals for inputting and outputting power to the other side of the board; And a line pattern connected to the first and second light emitting elements and some terminals of the first and second connection parts to connect the first and second light emitting elements in parallel. The method of claim 1, wherein the first connection portion of the first light emitting module is mounted overlapping with the terminal of the connector board,
And a second connection portion and a first connection portion of the two adjacent light emitting modules overlap each other so that the terminals are connected to each other. The light emitting device of claim 1, wherein the first connection portion of the light emitting module protrudes in a direction opposite to the direction in which the light emitting module is connected to another light emitting module, and the terminals of the first connection portion are exposed to an upper surface or a lower surface thereof. The light emitting device of claim 1, further comprising a second connector disposed on two adjacent light emitting modules among the plurality of light emitting modules, and an intermediate connector substrate mounted on the first connector. The display device of claim 1, wherein each of the light emitting modules comprises: a first lead pattern and a second lead pattern on which the first light emitting element is mounted; And a third lead pattern and a fourth lead pattern on which the second light emitting device is mounted.
The length of the first and second lead pattern and the third and fourth lead pattern is at least twice as long as the width of the light emitting element for adjusting the pitch between the light emitting element. The light emitting device of claim 5, wherein a distance between the first and second light emitting elements in each light emitting module is the same or different. The light emitting device of claim 1, wherein the light emitting device includes at least two feedback terminals connected to the first connection part and the second connection part of each light emitting module for parallel driving of the first and second light emitting devices. The light emitting device of claim 1, wherein each of the light emitting modules has a width equal to each other. The method of claim 1, wherein the board comprises any one of a resin-based printed circuit board (PCB), a metal core PCB (MCPCB), a flexible PCB (FPCB) and a ceramic substrate. Light emitting device comprising. The light emitting device of claim 1, wherein the light emitting module array comprises: a light guide plate disposed on at least one side;
A reflective sheet under the light guide plate; And
Light emitting device comprising an optical sheet on the light guide plate. The light emitting device of claim 10, further comprising a bottom cover to accommodate the light emitting element array, the light guide plate, the reflective sheet, and the optical sheet.

Images