JP2013025945A - Surface light-emitting device and display device equipped with surface light-emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface light-emitting device and a display device, realizing thinning and capable of uniformalizing brightness of light illuminating an opposite side of a display surface of a display panel.SOLUTION: The surface light-emitting device includes a plurality of frame bodies 43 and a plurality of printed circuit boards 41. The frame bodies 43, each consisting of a rectangular bottom part 431 with an opening 433 formed at its center thereof, and a peripheral wall 432 fitted on the whole circumference of the peripheral edge of the bottom part 431, with an opposed surface of the bottom part 431 opened, are arranged in a matrix. The printed circuit boards 41 are arranged so that each of a plurality of light sources 42 arrayed in one line penetrates the opening 433 of each frame body 43 from outside. The peripheral wall 432 is protruded from the light source 42 to a display panel 3 side, and is formed so as the opposed surface side of the bottom part 431 to be positioned outside of the bottom part 431 side. An intersection point O on an extended line of an adjoining peripheral wall 432 or an intersection point O of a tangent furthest to a display panel 3 side on a curved surface of the adjoining peripheral wall 432 is positioned closer to a printed circuit board 41 side than the display panel 3.

Description

  The present invention relates to a surface light emitting device that illuminates a display panel and a display device including the surface light emitting device.

  The display device includes a display panel that displays an image and a surface light-emitting device that illuminates the display panel from the back, and is used for a liquid crystal television, a mobile phone, a display, and the like. In recent years, the tendency of reduction and thinning of power consumption has increased, and in particular, reduction of power consumption and thinning of a surface light emitting device have become issues.

  The surface light emitting device adopts a direct-type backlight system that directly irradiates the display panel with light from multiple light sources arranged on the back of the display panel, and applies local dimming technology that can reduce power consumption There is something to do. In local dimming technology, according to the brightness of the image displayed on the display panel, the display panel is displayed by increasing the contrast by individually controlling the amount of light emitted from multiple light sources that directly illuminate the display panel from the back side. The contrast ratio of different areas in the same screen can be greatly increased.

  Some surface light emitting devices to which local dimming technology is applied include a substrate, a plurality of light sources, a peripheral wall, and a diffusion plate (see, for example, Patent Document 1). The plurality of light sources are mounted on the substrate with the light emitting surface facing the diffusion plate, and are divided into areas for individually controlling the light emission amounts. The peripheral wall protrudes from the substrate between each area so as to divide each area, and prevents leakage of light outside the area. The diffusion plate is disposed on the back side of the display panel and opposed to the substrate with a plurality of light sources interposed therebetween, and diffuses light from each light source. The display panel is illuminated from the back side by the diffused light.

JP 2010-238420 A

  In the surface light emitting device described in Patent Document 1, the light source is arranged in all areas on the back surface of the diffusion plate, and the light emission surface of the light source is directed toward the diffusion plate side so that light is directly irradiated to the diffusion plate. In order to make it possible to uniformly expand the light from the light source, it is necessary to make the optical path length from the light emitting surface of the light source to the diffusion plate a certain value or more. In addition, when light is not irradiated to the tip of the peripheral wall that divides each area, light is not irradiated to the location of the diffuser plate that faces the tip of the peripheral wall, so the back of the display panel is illuminated along the peripheral wall that divides each area. There arises a problem that the brightness of the light to be reduced is reduced.

  The object of the present invention is to achieve thinning by indirectly irradiating the light from the light source to the opposite side of the display surface of the display panel and making the shape of the tip of the peripheral wall not disturb the light irradiation. In addition, an object of the present invention is to provide a surface light emitting device capable of making the luminance of light illuminating the opposite side of the display surface of the display panel uniform.

  The surface light emitting device according to the present invention includes a plurality of substrates and a plurality of frames, and is disposed to face the opposite side of the display surface of the display panel. Each of the plurality of substrates has a plurality of light sources mounted in a row. The plurality of frames have a rectangular bottom portion having an opening in which a light source is disposed at the center, and a peripheral wall provided around the entire periphery of the bottom portion, and the opposing surfaces of the bottom portion are open. The plurality of frames are arranged in a matrix. The plurality of substrates are arranged such that each of the plurality of light sources penetrates each of the openings of the plurality of frame bodies from the outside. Each peripheral wall of the plurality of frames is formed so as to protrude from the plurality of light sources to the display panel side, and at least the opposed surface side of the bottom portion is located outside the bottom portion side. An intersection point on an extension line of each peripheral wall of the adjacent frame body or an intersection point of the tangent line closest to the display panel in the curved surface of each peripheral wall of the adjacent frame body is located closer to the substrate side than the display panel. The plurality of light sources irradiate light toward at least a bottom portion and a peripheral wall of the frame in which each of the light sources is disposed.

  In this configuration, the light from the light source is reflected by the bottom or peripheral wall of the frame and indirectly irradiated to the opposite side of the display surface of the display panel. Therefore, the light from the light source is directed to the opposite side of the display surface of the display panel. The optical path length becomes longer than direct irradiation. In addition, since the intersection point on the extension line of each peripheral wall of the adjacent frame body, or the intersection point of the tangent line closest to the display panel in the curved surface of each peripheral wall of the adjacent frame body is located on the substrate side from the display panel, The area of the plane formed at the tip portion formed by each peripheral wall of the adjacent frame body is smaller than that of the peripheral wall having the same length and the intersection point located beyond the display panel.

  In this configuration, it is preferable that the frame has a reflecting plate that reflects light on the inner surface of the bottom and the inner surface of the peripheral wall. Thereby, since the light from the light source is reflected with high reflection efficiency at the bottom and the peripheral wall of the frame, it is possible to prevent a shortage of the amount of light irradiated above the peripheral wall in each of the plurality of frames. The brightness of the light that illuminates the opposite side of the display surface of the panel can be made more uniform.

  Further, the present invention can be applied to a surface light-emitting device provided with a diffusion plate that is disposed on the display panel side and is opposed to a substrate and diffuses light to emit light.

  Moreover, it is preferable that the shape of the bottom part of a frame is a square. Thus, by arranging the frame body according to the area of the display surface of the display panel, a surface light emitting device according to the area of the display panel can be used, and the opposite side of the display surface of the display panel is irradiated without omission. be able to.

  The plurality of light sources are a light emitting element such as an LED disposed with the light emitting surface facing the display panel, and a lens disposed so as to cover the light emitting surface of the light emitting element, and polarizes light from the light emitting element. Thus, it is preferable to have a configuration that includes a lens that irradiates at least the bottom portion and the peripheral wall of the frame body in which each is disposed.

  Thereby, the light from a light emitting element can be reliably irradiated to the bottom part and peripheral wall of a frame.

  The surface light-emitting device according to the present invention can realize a reduction in thickness and uniform brightness of light that illuminates the opposite side of the display surface of the display panel.

1 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. It is a top view of the board | substrate and frame material of the surface light-emitting device in the display apparatus. FIG. 3A is a plan view of the frame of the surface light emitting device, and FIG. 3B is a cross-sectional view of the frame. It is a top view of the same surface light-emitting device before the diffusion plate is attached. It is a front view of the light source of the same surface light-emitting device. It is explanatory drawing of the irradiation area | region of the 1st area | region in the same surface light-emitting device. It is explanatory drawing of the irradiation area | region of a 2nd area | region in the same surface light-emitting device. It is explanatory drawing of the irradiation area | region of the 2nd area | region for every shape of the front-end | tip part which an adjacent surrounding wall comprises in the same surface light-emitting device. It is explanatory drawing of the irradiation area | region of the sum total of 1st area | region and 2nd area | region in the same surface light-emitting device. It is sectional drawing of the metal mold | die of the frame of the same surface light-emitting device. 10A is a front view of a support component of the same surface light emitting device, FIG. 10B is a cross-sectional view of the same surface light emitting device when the support component is attached, and FIG. 10C is a support component. It is a top view of the same surface light-emitting device at the time of attaching. It is sectional drawing of the surrounding wall of the frame of another shape. It is sectional drawing of the surrounding wall of the frame of another shape.

  A surface light emitting device 4 and a display device 1 according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, the display device 1 includes a frame material 2, a display panel 3, and a surface light emitting device 4. The display device 1 is used for, for example, a liquid crystal television, a mobile phone, a display, and the like.

  The frame material 2 holds the display panel 3 and the surface light emitting device 4 fixedly.

  The display panel 3 displays characters and images on the display surface. For example, the display panel 3 is a liquid crystal panel on which moving images, still images, characters, and the like input from the outside are displayed, and a display plate on which characters and images are drawn.

  The surface light emitting device 4 includes a printed circuit board 41, a light source 42, a frame body 43, and a diffusion plate 44, and illuminates the opposite side (hereinafter referred to as the back side) of the display surface of the display panel 3.

  The printed circuit board 41 is disposed to face the back side of the display panel 3 with the diffusion plate 44 interposed therebetween. As shown in FIG. 2, the printed circuit board 41 has a rectangular shape, and a plurality of light sources 42 are mounted in a row at predetermined intervals along the longitudinal direction. The plurality of printed circuit boards 41 are attached to the frame material 2 so as to be parallel to each other.

  The light source 42 includes an LED (light emitting diode) 421 and a lens 422 which are light emitting elements. The LED 421 emits light when energized. The lens 422 is made of plastic, polarizes the light emitted by the LED 421, and irradiates a predetermined irradiation area.

  As shown in FIG. 3, the plurality of frame bodies 43 are arranged in a matrix and are integrally formed by the mold 5 (see FIG. 10). The frame body 43 has a bottom portion 431 having a square shape and a peripheral wall 432 provided on the entire periphery of the bottom portion 431, and an opposing surface facing the bottom portion 431 is open. In addition, the shape of the bottom part 431 should just be a rectangle, and is not restricted to a square. When the shape of the bottom 431 is square, the frame body 43 can be arranged according to the area of the display surface of the display panel 3, and the size of the surface light emitting device 4 is determined according to the area of the display surface of the display panel 3. The back side of the display panel 3 can be irradiated without leakage.

  At the center of the bottom 431, an opening 433 in which the light source 42 is disposed is formed. The peripheral wall 432 is formed such that the open end 4321 on the opposite surface side of the bottom portion 431 is inclined outward from the fixed end 4322 on the bottom portion 431 side.

  The frame 43 is formed of a resin having a high light reflection efficiency. Note that the frame body 43 may be a reflection plate, and a reflection plate may be attached to the inner surfaces of the bottom portion 431 and the peripheral wall 432. In addition, a liquid having high reflection efficiency may be applied to the inner surfaces of the bottom 431 and the peripheral wall 432.

  As shown in FIG. 4, the plurality of frames 43 are arranged on the printed circuit board 41. Each of the plurality of light sources 42 mounted on the printed circuit board 41 penetrates the respective openings 433 of the plurality of frames 43 from the outside. In a state where the plurality of frame bodies 43 are arranged on the printed circuit board 41, the open end 4321 of the peripheral wall 432 protrudes to the display panel 3 side from the light source 42.

  The diffusion plate 44 is disposed to face the back side of the display panel 3 and diffuses the light emitted from the light source 42 to emit surface light. The diffusing plate 44 is supported by the frame member 2 at the peripheral edge (not shown). The diffusion plate 44 may be provided in the display panel 3 without being provided in the surface light emitting device 4.

  With the above-described configuration, the surface light emitting device 4 employs a direct type backlight system and applies a local dimming technique.

  Next, the predetermined irradiation area of the light source 42 will be described with reference to FIGS.

  As shown in FIG. 5, the LED 421 is attached to the printed circuit board 41 with the light emitting surface 4211 facing the display panel 3 side.

  The lens 422 has a cylindrical shape, and a concave portion 4222 in which the LED 421 is disposed is formed at the center of the bottom surface 4221. The lens 422 is formed with a recess 4222, and the LED 421 is accommodated in the recess 4222 so as to cover the light emitting surface 4211 of the LED 421. The lens 422 is attached to the printed circuit board 41.

  The facing surface 4223 of the bottom surface 4221 has a horizontal surface in the vicinity of the center, and a curved surface having a convex shape on the side facing the printed circuit board 41 from the center side toward the outside. The facing surface 4223 has a first region R1 inclined upward from the outer end point P1 toward the vertex P2 (a direction from the bottom surface 4221 toward the facing surface 4223), and downward from the vertex P2 toward the boundary point P3 between the horizontal plane and the curved surface. And a second region R2 that is inclined in the direction from the facing surface 4223 toward the bottom surface 4221.

  As shown in FIG. 6, when the light from the LED 421 passes through the vicinity of the end point P1 outside the lens 422, it is directly irradiated to the diffusion plate 44 above the peripheral wall 432 of the frame body 43, and in the vicinity of the vertex P2 of the lens 422. , The diffusing plate 44 near the periphery of the lens 422 is directly irradiated.

  As described above, when the light from the LED 421 passes through the first region R <b> 1, the light is directly irradiated above the diffusion plate 44 in the range from the vicinity of the periphery of the lens 422 to the peripheral wall 432 of the frame body 43. The irradiation region in the first region R1 corresponds to the hatched region of the vertical line in FIG.

  Further, the amount of light that has passed through the first region R1 is lower than the amount of light that has passed through the second region R2. In particular, the amount of light that irradiates the diffusion plate 44 decreases as the distance from the light source 42 increases. With only the light that has passed through the first region R <b> 1, the amount of light that irradiates the diffusion plate 44 becomes insufficient as it approaches the peripheral wall 432 of the frame body 43.

  As shown in FIG. 7, when the light from the LED 421 passes near the apex P <b> 2 of the lens 422, the light is directly irradiated to the vicinity of the periphery of the lens 422 at the bottom 431 of the frame 43, and the reflected light is irradiated to the diffusion plate 44. Is done. Further, when passing near the boundary point P3 of the lens 422, the peripheral wall 432 is directly irradiated as light parallel to the bottom portion 431, and the reflected light is irradiated to the diffuser plate 44.

  When the light from the LED 421 passes between the vicinity of the apex P2 of the lens 422 and the vicinity of the boundary point P3, the light is directly applied to the bottom 431 of the frame body 43. When the light reflected by the bottom 431 is reflected by the open end 4321 of the peripheral wall 432, the light is irradiated to the diffusion plate 44 above the open end 4321 of the peripheral wall 432, and passes through the open end 4321 of the peripheral wall 432, thereby adjacent frames. The upper diffusion plate 44 in the vicinity of the peripheral wall 432 of 43 is irradiated.

  As described above, when the light from the LED 421 passes through the second region R2, the bottom 431 and the peripheral wall 432 of the frame body 43 are directly irradiated, and the reflected light is irradiated to the diffusion plate 44.

  Specifically, as shown in FIG. 8A, when the shape of the tip portion formed by each peripheral wall 432 (hereinafter referred to as the adjacent peripheral wall 432) of the adjacent frame bodies 43 is an acute angle, the peripheral wall 432. The light reflected by the open end 4321 is applied to the diffusion plate 44 above the open end 4321. That is, since the light reflected by the open end 4321 of the adjacent peripheral wall 432 is irradiated to the diffusion plate 44 above the open end 4321, the light is irradiated to the diffusion plate 44 above the tip portion without any gap. Thereby, the light quantity of the light which irradiates the diffusion plate 44 above the tip can be maintained, and the luminance of the light illuminating the back side of the display panel 3 can be made uniform. In addition, the shape of the front-end | tip part which the adjacent surrounding wall 432 comprises is not restricted to an acute angle, A right angle or an obtuse angle may be sufficient. Even if the shape of the tip portion is a right angle and an obtuse angle, the light reflected by the open end 4321 of the adjacent peripheral wall 432 is irradiated to the diffusion plate 44 above the tip portion without any gap.

  As shown in FIG. 8B, when the shape of the tip formed by the adjacent peripheral wall 432 is a plane, and the intersection point O on the extension line of the adjacent peripheral wall 432 is located closer to the printed circuit board 41 than the diffusion plate 44, The light reflected at the position closest to the open end 4321 on the inclined surface of the peripheral wall 432 is applied to the diffusion plate 44 above the position. That is, the light reflected at the position closest to the open end 4321 on the inclined surface of the adjacent peripheral wall 432 is irradiated to the diffusion plate 44 above the tip portion with a slight gap M1. The slight gap M1 in the diffusing plate 44 is irradiated by light that has passed through the first region R1 or light that has passed above the tip. Thereby, the light quantity of the light which irradiates the diffusion plate 44 above the tip can be maintained, and the luminance of the light illuminating the back side of the display panel 3 can be made uniform.

  As shown in FIG. 8C, when the shape of the tip portion formed by the adjacent peripheral walls 432 is a plane and the intersection point O on the extension line of the adjacent peripheral walls 432 exceeds the diffusion plate 44, the inclined surface of the peripheral wall 432 The light reflected at the location closest to the open end 4321 is applied to the diffusion plate 44 above the location. That is, the light reflected at the position closest to the open end 4321 on the inclined surface of the adjacent peripheral wall 432 is irradiated to the diffusion plate 44 above the tip portion with the gap M2. The gap M2 in the diffusing plate 44 is irradiated by light that has passed through the first region R1 or light that passes above the tip, but since the gap M2 is wide, the amount of light that irradiates the gap M2 is maintained. I can't.

  As described above, the distance L2 from the fixed end 4322 to the open end 4321 of the peripheral wall 432 of the frame body 43 is equal to the open end 4321 of the adjacent peripheral wall 432 when the distance L1 from the open end 4321 of the peripheral wall 432 to the diffusion plate 44 is equal. When the intersection point O on the extended line is positioned closer to the printed circuit board 41 than the diffusion plate 44, the gap M1 is only slightly formed, so that the amount of light irradiating the diffusion plate 44 can be maintained, and the intersection point When O exceeds the diffusion plate 44, the gap M2 is wide, so that the amount of light that irradiates the diffusion plate 44 cannot be maintained.

  The irradiation region in the second region R2 coincides with the vertical hatching region in FIG. 7 when the intersection O on the extension line of the open end 4321 of the adjacent peripheral wall 432 is located on the printed circuit board 41 side from the diffusion plate 44.

  Further, the irradiation region obtained by adding the irradiation region in the first region R1 and the irradiation region in the second region R2 coincides with the hatching region in FIG. Further, the vicinity of the light emitting surface 4211 of the LED 421 is also irradiated. The surface light emitting device 4 can lengthen the optical path length by indirectly irradiating the diffusion plate 44, and can shorten the vertical distance from the light emitting surface 4211 of the LED 421 of the light source 42 to the diffusion plate 44. Therefore, a reduction in thickness can be realized. Since the surface light emitting device 4 can also irradiate the diffusion plate 44 above the peripheral wall 432 of the frame body 43, the luminance of the light that illuminates the back side of the display panel 3 can be made uniform.

  Next, the metal mold | die 5 which shape | molds the frame 43 is demonstrated with reference to FIG. The plurality of frame bodies 43 arranged in a matrix are integrally formed using a mold 5 shown in FIG. The mold 5 includes a main body part 51, a core part 52, a core part 53, and a movable part 54. The main body 51 has a recess 511 in which the cores 52 and 53 are stored. The core portions 52 and 53 have inclined surfaces 521 and 531 formed on one side adjacent to each other. The movable portion 54 is formed with a convex portion 541 having a sharp tip, and is movable in the vertical direction with respect to the main body portion 51. The movable portion 54 is disposed so that the convex portion 541 faces the inclined surfaces 521 and 531 of the core portions 52 and 53 in a state where the core portions 52 and 53 are stored in the concave portion 511 of the main body portion 51. A melted plastic raw material is poured between the main body 51 and the movable portion 54. When the plastic material is hardened, the movable part 54 is moved in a direction away from the main body part 51, and the plastic frame body 43 is taken out. The inclined surfaces 521 and 531 of the core parts 52 and 53 form the peripheral wall 432 of the frame body 43, and the bottom surfaces of the main body part 51 and the core parts 52 and 53 form the bottom part 431 of the frame body 43.

  The core portions 52 and 53 can be replaced because damage such as cracking, wear, or plastic deformation occurs due to use. In addition, when the core portions 52 and 53 are integrated without being separated from each other, the tip portions formed by the adjacent peripheral walls 432 may be flat because they are formed by punching. By making the core parts 52 and 53 separate, the front-end | tip part which the adjacent surrounding wall 432 comprises can be made an acute angle, a right angle, and an obtuse angle.

  The diffusion plate 44 may be supported by the support component 6 provided upright at the intersection of the plurality of frame bodies 43 in addition to the frame material 2. As shown in FIG. 11A, the support component 6 includes a circular bottom 61, an elongated columnar main body 62 standing at the center of the bottom 61, and a distal end 63 of the main body 62. The tip portion 63 has a conical shape, and the tip is formed at an acute angle. As shown in FIGS. 11B and 11C, the support component 6 is arranged at the intersection of the peripheral walls 432 of the plurality of frame bodies 43 arranged in a matrix. The support component 6 is disposed inside each peripheral wall 432 of the intersecting frame body 43, and the tip portion 63 protrudes from each peripheral wall 432 of the intersecting frame body 43 so as to contact the diffusion plate 44. The diffusion plate 44 is supported.

  Thereby, even if the surface emitting device 4 enlarges, the diffuser plate 44 can be supported without bending. Further, since the surface light emitting device 4 supports the diffusion plate 44 by the sharp tip portion 63, the light emission from the light source 42 is not hindered.

  In addition, as shown in FIG. 12, the shape of the surrounding wall 432 of the frame 43 is not restricted to an inclined surface. For example, as shown in FIG. 12A, the peripheral wall 432A may have a shape having an inclined surface 4324A that is steeper than the inclined surface 4323A at the tip of the inclined surface 4323A. As shown in FIG. 12B, the peripheral wall 432B may have a curved surface 4324B at the tip of the inclined surface 4323B. As shown in FIG. 12C, the peripheral wall 432C may have a curved surface 4324C at the tip of a wall surface 4323C perpendicular to the bottom 431C. As shown in FIG. 12D, the peripheral wall 432D may have a shape having an inclined surface 4324D at the tip of a wall surface 4323D perpendicular to the bottom portion 431D. As mentioned above, the shape of the front-end | tip part of the adjacent surrounding wall 432 should just be formed in an acute angle, a right angle, an obtuse angle, or a curved surface. In other words, the shape of the peripheral wall 432 of the frame body 43 may be formed such that the open end 4321 is positioned outward from the fixed end 4322.

  When the open end 4321 is located outward from the fixed end 4322, the light from the light source 42 is applied to the open end 4321 of the adjacent peripheral wall 432, and the reflected light is above the tip portion formed by the adjacent peripheral wall 432. The diffusion plate 44 is irradiated. Thereby, since the light quantity of the light which irradiates the diffusion plate 44 along the peripheral wall 432 of the some frame 43 is not insufficient, the brightness | luminance of the light which illuminates the back side of the display panel 3 can be equalize | homogenized. .

  As shown in FIG. 13 (A), when the shape of the tip formed by the adjacent peripheral wall 432A is a plane, the intersection O on the extension line of the inclined surface 4324A on the open end 4321 side of the adjacent peripheral wall 432A is If the diffuser plate 44 is positioned on the printed circuit board 41 side, the gap M3 in the diffuser plate 44 can be made small.

  As shown in FIG. 13B, when the shape of the tip formed by the adjacent peripheral wall 432B is a plane, an intersection O of the tangent line of the curved surface 4324B on the open end 4321 side of the adjacent peripheral wall 432B is obtained from the diffusion plate 44. If it is located on the printed circuit board 41 side, the gap M4 in the diffusion plate 44 can be made small.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus 3 ... Display panel 4 ... Surface light-emitting device 41 ... Printed circuit board 42 ... Light source 43 ... Frame 44 ... Diffusing plate 421 ... LED
422 ... Lens 431 ... Bottom 432 ... Peripheral wall 433 ... Opening 4211 ... Light emitting surface 4321 ... Open end 4322 ... Fixed end

Claims (6)

A surface light-emitting device disposed opposite to the display surface of the display panel,
A plurality of substrates on which a plurality of light sources are mounted in a row;
A rectangular bottom portion having an opening in which a light source is disposed at the center, and a plurality of frames having peripheral walls provided around the entire periphery of the bottom portion, the opposed surfaces of the bottom portion being open; Prepared,
The plurality of frames are arranged in a matrix,
The plurality of substrates are arranged so that each of the plurality of light sources penetrates each of the openings of the plurality of frames from the outside,
Each of the peripheral walls of the plurality of frame bodies is formed so as to protrude from the plurality of light sources toward the display panel, and at least the opposed surface side of the bottom portion is positioned outside the bottom portion side,
An intersection point on an extension line of each peripheral wall of the adjacent frame body or an intersection point of the tangent line closest to the display panel in the curved surface of each peripheral wall of the adjacent frame body is located closer to the substrate than the display panel,
The plurality of light sources is a surface light emitting device that irradiates light toward a bottom portion and a peripheral wall of a frame at which each of the plurality of light sources is disposed.   The surface light-emitting device according to claim 1, wherein the frame includes a reflecting plate that reflects light on an inner surface of the bottom portion and an inner surface of the peripheral wall.   The surface light-emitting device according to claim 1, further comprising a diffusion plate that is disposed on the display panel side and is opposed to the substrate, and diffuses light to emit surface light.   The surface light-emitting device according to claim 1, wherein a shape of a bottom portion of the frame body is a square. The plurality of light sources are
A light emitting element disposed with a light emitting surface facing the display panel;
A lens disposed so as to cover a light emitting surface of the light emitting element, the lens polarizing the light from the light emitting element and irradiating at least the bottom and the peripheral wall of the frame in which each is disposed. The surface light-emitting device in any one of Claims 1-4. A display panel for displaying images,
A surface light emitting device according to claim 1, wherein the display device is disposed opposite to the opposite side of the display surface of the display panel.

Images