WO2012060313A1

WO2012060313A1 - Illumination device and display device

Info

Publication number: WO2012060313A1
Application number: PCT/JP2011/075036
Authority: WO
Inventors: 張　志芳
Original assignee: シャープ株式会社
Priority date: 2010-11-05
Filing date: 2011-10-31
Publication date: 2012-05-10

Abstract

The present invention provides an illumination device that can reduce unevenness in the luminance of an illuminated component. The backlight device (illumination device) (3) includes LEDs (10) and a reflective member (20) that reflects the light emitted from the LEDs. The reflective member includes a bottom surface (21), a plurality of side surfaces (22), and a plurality of slanting surfaces (23) provided at the corners of the reflective member. The slanting surface is slanted with respect to the bottom surface and to the adjacent side surfaces and is also slanted such that the angle between the slanting surface and an extended plane (S1) formed by extending the bottom surface outward is smaller than 90 degrees.

Description

Illumination device and display device

The present invention relates to an illuminating device and a display device, and more particularly to an illuminating device and a display device including a light source and a reflecting member.

Conventionally, a display device including a light source and a reflecting member is known.

FIG. 13 is a cross-sectional view showing the structure of a display device according to a conventional example. FIG. 14 is a plan view showing the structure of the light source and the reflecting member of FIG. FIG. 15 is an enlarged perspective view showing the structure of the corner portion of the reflecting member of FIG.

A display device 501 according to a conventional example includes a display panel (illuminated member) 502 and a backlight device (illumination device) 503 that illuminates the display panel 502, as shown in FIG.

The backlight device 503 includes a plurality of light sources 510, a reflection member 520 that reflects light from the light sources 510 toward the display panel 502, and a diffusion sheet disposed on the light source 510 and the reflection member 520 (on the display panel 502 side). And a backlight chassis 540 that houses the light source 510 and the reflection member 520.

The plurality of light sources 510 are arranged in the D direction (longitudinal direction of the display panel 502) and the E direction (short direction of the display panel 502) as shown in FIG. The reflection member 520 includes a rectangular bottom surface 521 and four side surfaces 522 inclined with respect to the bottom surface 521.

In this display device 501, as shown in FIG. 15, light P501 and P502 emitted from the light source 510 in the D direction or the E direction are perpendicular to the bottom surface 521 by the side surface 522 (F direction (D direction and E direction). Reflected in a direction perpendicular to the direction)). Accordingly, it is possible to suppress a decrease in luminance at the peripheral portion of the display panel 502, and it is possible to suppress the luminance of the display panel 502 from becoming uneven to some extent.

In addition, the illuminating device provided with the reflective member which four side surfaces inclined with respect to the bottom face is disclosed by patent document 1, for example.

JP 2010-40195 A

However, in the display device 501 according to the conventional example, as shown in FIG. 15, the light P503 emitted from the light source 510 toward the corner portion of the reflecting member 520 is perpendicular to the bottom surface 521 at the side surface 522 (F direction). ) Is not reflected. For this reason, there is a problem that the luminance of the corner portion of the display panel 502 is lowered and the luminance of the display panel 502 becomes non-uniform.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illuminating device and a display device capable of suppressing the luminance of a member to be illuminated from becoming uneven. Is to provide.

In order to achieve the above object, an illumination device according to a first aspect of the present invention includes a light source and a reflecting member that reflects light from the light source toward the illuminated member. The reflecting member includes a bottom surface, and a plurality of reflecting members. An angle formed between the side surface and a plurality of inclined surfaces provided at the corners of the reflecting member, the inclined surface being inclined with respect to the bottom surface and the adjacent side surface, and an extended surface extending the bottom surface outward Is inclined to be smaller than 90 degrees.

In the illuminating device according to the first aspect, as described above, the angle formed between the corner portion of the reflecting member and the extended surface that is inclined with respect to the bottom surface and the adjacent side surface and extends to the outside is 90. An inclined surface inclined so as to be smaller than the angle is provided. Thereby, the light radiate | emitted toward the corner part of the reflection member from the light source can be reflected in a direction perpendicular | vertical with respect to a bottom face by an inclined surface. As a result, it is possible to suppress the luminance of the corner portion of the illuminated member (the portion of the illuminated member corresponding to the corner portion of the reflecting member) from being lowered, and thus the luminance of the illuminated member becomes non-uniform. Can be suppressed.

In the illumination device according to the first aspect, preferably, the plurality of side surfaces are inclined so that an angle formed with an extended surface obtained by extending the bottom surface outward is smaller than 90 degrees. If comprised in this way, the light from a light source can be reflected in the direction perpendicular | vertical with respect to a bottom face by a side surface. Thereby, since it can suppress that the brightness | luminance of the peripheral part (part corresponding to the peripheral part of a reflective member of a to-be-illuminated member) falls, the brightness | luminance of a to-be-illuminated member becomes non-uniform | heterogenous. Can be further suppressed.

In the lighting device according to the first aspect, preferably, the inclined surface is formed so as to face the direction of the light source disposed closest to the inclined surface as viewed in a plan view. If comprised in this way, the light radiate | emitted toward the corner part of the reflective member from the light source arrange | positioned nearest to the inclined surface can be easily reflected in a direction perpendicular to the bottom surface by the inclined surface. Can do. Thereby, it can suppress effectively that the brightness | luminance of the corner part of a to-be-illuminated member falls.

In the illuminating device according to the first aspect, preferably, the inclined surface is disposed closest to the inclined surface and the line of intersection of the two adjacent side surfaces, or the line of intersection of the extended surface extending from the two adjacent side surfaces. It is arranged between the light sources. If comprised in this way, since an inclined surface can be arrange | positioned close to a light source, the quantity of the light reflected by an inclined surface can be increased. Thereby, it can suppress more that the brightness | luminance of the corner part of a to-be-illuminated member falls.

In the lighting device according to the first aspect, the inclined surface may be formed in a triangular shape.

In the illumination device according to the first aspect, preferably, the width of the central portion of the inclined surface is larger than the width of the portion closest to the bottom surface of the inclined surface and the width of the portion farthest from the bottom surface. If comprised in this way, the light which progresses toward the center part of an inclined surface can be reflected more in the direction perpendicular | vertical with respect to a bottom face. Thereby, since it can suppress more that the brightness | luminance of the corner part of a to-be-illuminated member falls, it can suppress more that the brightness | luminance of an to-be-illuminated member becomes non-uniform | heterogenous.

In this case, the inclined surface may be formed in a rhombus shape or an oval shape.

In the lighting device according to the first aspect, the inclined surface is preferably formed integrally with the bottom surface and the plurality of side surfaces. If comprised in this way, it can suppress that the number of parts of a reflection member increases.

In the lighting device according to the first aspect, preferably, the inclined surface is provided separately from the bottom surface and the plurality of side surfaces. If comprised in this way, an inclined surface can be easily formed in a complicated shape, for example. Moreover, since the area of an inclined surface can be enlarged easily, it can suppress more easily that the brightness | luminance of the corner part of a to-be-illuminated member falls.

In the illumination device according to the first aspect, preferably, the light source includes a light emitting diode. If comprised in this way, a light source and an illuminating device can be reduced in size, weight, and power consumption easily.

A display device according to a second aspect of the present invention includes the illumination device configured as described above and a display panel illuminated by the illumination device. If comprised in this way, the display apparatus which can suppress that the brightness | luminance of a display panel (illuminated member) will become nonuniform can be obtained.

As described above, according to the present invention, it is possible to easily obtain an illuminating device and a display device capable of suppressing non-uniform luminance of a member to be illuminated.

1 is a cross-sectional view illustrating a structure of a liquid crystal display device according to a first embodiment of the present invention. It is the top view which showed the structure of LED of FIG. 1, and a reflection member. FIG. 3 is a cross-sectional view taken along line 100-100 in FIG. It is the expansion perspective view which showed the structure of the corner part of the reflection member of FIG. FIG. 3 is a cross-sectional view taken along line 200-200 in FIG. It is the expansion perspective view which showed the structure of the corner part of the reflection member of FIG. It is the top view which showed structure of LED and the reflection member of the liquid crystal display device by 2nd Embodiment of this invention. It is the expansion perspective view which showed the structure of the corner part of the reflection member of FIG. It is the expansion perspective view which showed the structure of the corner part of the reflection member of FIG. It is the expanded sectional view which showed the structure of the corner part of the reflection member of FIG. It is sectional drawing which showed an example of the structure of LED used for 2nd Embodiment. It is the expansion perspective view which showed the structure of the corner part of the reflection member of the liquid crystal display device by 3rd Embodiment of this invention. It is sectional drawing which showed the structure of the display apparatus by an example of the past. It is the top view which showed the structure of the light source and reflection member of FIG. It is the expansion perspective view which showed the structure of the corner part of the reflection member of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In order to facilitate understanding, even a cross-sectional view may not be hatched.

(First embodiment)
The structure of the liquid crystal display device 1 according to the first embodiment of the present invention will be described with reference to FIGS.

The liquid crystal display device 1 according to the first embodiment of the present invention constitutes, for example, a liquid crystal television receiver (not shown). As shown in FIG. 1, the liquid crystal display device 1 includes a liquid crystal display panel 2 and a backlight device 3 that is disposed on the lower side (back side) of the liquid crystal display panel 2 and illuminates the liquid crystal display panel 2. Has been. The liquid crystal display device 1 is an example of the “display device” in the present invention, and the liquid crystal display panel 2 is an example of the “illuminated member” and the “display panel” in the present invention. The backlight device 3 is an example of the “illumination device” in the present invention.

The liquid crystal display panel 2 includes two glass substrates that sandwich a liquid crystal layer (not shown). The liquid crystal display panel 2 functions as a display panel when illuminated by the backlight device 3.

The backlight device 3 is a direct type backlight device, and includes a plurality of LEDs (Light Emitting Diodes) 10 and a reflection member 20 that reflects light from the LEDs 10 upward (to the liquid crystal display panel 2 side). The optical member 30 is disposed between the reflecting member 20 and the liquid crystal display panel 2 and the backlight chassis 40 that houses the LED 10 and the reflecting member 20. The LED 10 is an example of the “light source” in the present invention.

The plurality of LEDs 10 are arranged in the A direction (longitudinal direction of the liquid crystal display panel 2) and the B direction (short direction of the liquid crystal display panel 2) as shown in FIG. The plurality of LEDs 10 are arranged at predetermined intervals in the A direction and the B direction, respectively. The arrangement interval of the LEDs 10 is determined by the thickness of the backlight device 3 and the spread angle of light emitted from the LEDs 10. Specifically, the plurality of LEDs 10 are arranged so that light emitted from the adjacent LEDs 10 overlaps and a dark portion does not occur between the adjacent LEDs 10. A lens (not shown) that increases the spread angle of the light emitted from the LED 10 may be provided on the light emitting side of the LED 10.

Of course, the LED 10a arranged at the peripheral edge of the plurality of LEDs 10 does not have the LED 10 adjacent to the outside, so that the luminance of the peripheral edge of the liquid crystal display panel 2 is likely to be lowered. For this reason, as will be described later, the four side surfaces 22 of the reflecting member 20 are inclined with respect to the bottom surface 21.

The reflection member 20 has a function of reflecting light from the LED 10 and light emitted from the LED 10 and reflected by the plurality of optical members 30 (see FIG. 1) to the upper side (the liquid crystal display panel 2 side). The material of the reflecting member 20 is not particularly limited as long as it has a function of reflecting light. For example, the reflecting member 20 can be formed using resin, metal, or the like.

Here, in the first embodiment, the reflecting member 20 includes a substantially rectangular (substantially rectangular) bottom surface 21, four side surfaces 22 arranged on four sides of the bottom surface 21, and four corner portions of the reflecting member 20. And four inclined surfaces 23 provided on.

In the bottom surface 21, an opening 21a is formed at a portion where the LED 10 is located. The LED 10 is mounted on a wiring board (not shown) disposed on the lower side (rear side) of the reflecting member 20 and on the upper side (the liquid crystal display panel 2 side) through the opening 21 a of the reflecting member 20. ).

The four side surfaces 22 are formed so as to go outward as they move away from the bottom surface 21 (toward the upper side). That is, as shown in FIG. 3, the four side surfaces 22 are inclined so that an angle (θ1) formed with the extended surface S <b> 1 that extends the bottom surface 21 outward is smaller than 90 degrees. As shown in FIG. 4, the four side surfaces 22 emit light P1 and P2 emitted from the LED 10 in the A direction or the B direction (primary rays of light to be reflected in the C direction by the side surfaces 22) with respect to the bottom surface 21. And has a function of reflecting in a direction perpendicular to the direction C (direction perpendicular to the A direction and the B direction).

In the first embodiment, the inclined surface 23 is formed in a triangular shape (for example, an isosceles triangular shape). The inclined surface 23 is formed integrally with the bottom surface 21 and the side surface 22. That is, in the first embodiment, the side surface 22 and the inclined surface 23 are formed by bending the end portion of the bottom surface 21.

In the first embodiment, the four inclined surfaces 23 are formed so as to go outward as they move away from the bottom surface 21 (toward the upper side). That is, as shown in FIG. 5, the four inclined surfaces 23 are inclined so that an angle (θ2) formed with the extended surface S <b> 1 that extends the bottom surface 21 outward is smaller than 90 degrees.

Moreover, in 1st Embodiment, as shown in FIG. 2 and FIG. 4, the inclined surface 23 faces LED10b (LED10 arrange | positioned at the corner part of the reflection member 20) arrange | positioned nearest to the inclined surface 23 side. It is formed as follows. In other words, as illustrated in FIG. 2, the inclined surface 23 is formed so that the perpendicular L1 of the inclined surface 23 passes over the LED 10b disposed closest to the inclined surface 23 as viewed in a plan view. . That is, the LED 10b disposed closest to the inclined surface 23 is disposed at a position directly in front of the inclined surface 23 when viewed in plan.

Therefore, as shown in FIG. 4, the light P3 emitted from the LED 10b toward the corner portion (inclined surface 23) of the reflecting member 20 is caused to be perpendicular to the bottom surface 21 (C direction) by the inclined surface 23. Reflected. Note that a point Q1 in FIG. 4 indicates a position where the light emitted from the LED 10b and reflected by the inclined surface 23 in the C direction reaches the inclined surface 23.

Moreover, in 1st Embodiment, as shown in FIG. 6, the inclined surface 23 is arrange | positioned between the intersection line L2 of the extended surface S2 which extended the adjacent two side surfaces 22, and LED10b nearest to the inclined surface 23. As shown in FIG. Has been.

The optical member 30 (see FIG. 1) is composed of a plurality of sheet members such as a diffusion sheet that diffuses light and a lens sheet that collects light in the forward direction.

The backlight chassis 40 (see FIG. 1) is made of, for example, a metal plate. The backlight chassis 40 is formed to have a U-shaped cross-sectional shape.

In the first embodiment, as described above, the angle formed between the corner portion of the reflecting member 20 and the extended surface S1 that is inclined with respect to the bottom surface 21 and the adjacent side surface 22 and that extends the bottom surface 21 outward. An inclined surface 23 inclined to be smaller than 90 degrees is provided. Thereby, the light emitted from the LED 10 toward the corner portion of the reflecting member 20 can be reflected by the inclined surface 23 in a direction perpendicular to the bottom surface 21 (C direction). As a result, it is possible to suppress the brightness of the corner portion of the liquid crystal display panel 2 from being lowered, and thus it is possible to suppress the brightness of the liquid crystal display panel 2 from becoming uneven.

Further, in the first embodiment, as described above, the plurality of side surfaces 22 are inclined so that the angle formed by the extended surface S1 extending from the bottom surface 21 to the outside is smaller than 90 degrees. Thereby, the light from the LED 10 can be reflected by the side surface 22 in a direction (C direction) perpendicular to the bottom surface 21. Thereby, since it can suppress that the brightness | luminance of the peripheral part of the liquid crystal display panel 2 falls, it can suppress more that the brightness | luminance of the liquid crystal display panel 2 becomes non-uniform | heterogenous.

In the first embodiment, as described above, the inclined surface 23 is formed so as to face the direction of the LED 10b arranged closest to the inclined surface 23 when viewed in a plan view. Thereby, the light emitted toward the corner portion of the reflecting member 20 from the LED 10b can be easily reflected in the direction (C direction) perpendicular to the bottom surface 21 by the inclined surface 23. As a result, it is possible to effectively suppress the luminance of the corner portion of the liquid crystal display panel 2 from being lowered.

In the first embodiment, as described above, the inclined surface 23 is located between the intersection line L2 of the extended surface S2 obtained by extending the two adjacent side surfaces 22 and the LED 10b disposed closest to the inclined surface 23. To place. Thereby, since the inclined surface 23 can be arrange | positioned close to LED10, the quantity of the light reflected by the inclined surface 23 can be increased. As a result, it is possible to further suppress the luminance of the corner portion of the liquid crystal display panel 2 from being lowered.

In the first embodiment, as described above, the inclined surface 23 can be formed integrally with the bottom surface 21 and the plurality of side surfaces 22 by forming the inclined surface 23 in a triangular shape. .

Further, by forming the inclined surface 23 integrally with the bottom surface 21 and the plurality of side surfaces 22, it is possible to suppress an increase in the number of parts of the reflecting member 20.

In the first embodiment, as described above, by using the LED 10 as the light source, the light source (LED 10) and the backlight device 3 can be easily reduced in size, weight, and power consumption. .

(Second Embodiment)
In the second embodiment, the case where the inclined surface 123 is formed in a rhombus shape, unlike the first embodiment, will be described with reference to FIGS.

In the liquid crystal display device according to the second embodiment of the present invention, the reflecting member 120 includes a bottom surface 21, four side surfaces 122, and four inclined surfaces 123, as shown in FIG.

The four side surfaces 122 are formed so that adjacent side surfaces 122 are in contact with each other, as shown in FIG. Further, as shown in FIG. 9, the four side surfaces 122 are configured so that the light P1 and P2 emitted from the LED 10 in the A direction or the B direction are perpendicular to the bottom surface 21 (C direction), as in the first embodiment. (Direction perpendicular to the A direction and the B direction)).

Moreover, in 2nd Embodiment, the inclined surface 123 is formed in the rhombus shape, and the width | variety of the center part (the part between the part nearest to the bottom face 21 and the part farthest from the bottom face 21) of the inclined face 123 Is larger than the width of the portion closest to the bottom surface 21 of the inclined surface 123 and the width of the portion farthest from the bottom surface 21.

In the second embodiment, the inclined surface 123 is formed separately from the bottom surface 21 and the side surface 122. That is, in the second embodiment, the side surface 122 is formed by bending the end portion of the bottom surface 21, and the inclined surface 123 is attached to the bottom surface 21 and the side surface 122. The inclined surface 123 may be formed by sticking a reflection sheet to a member fixed to the bottom surface 21 and the side surface 122, or may be formed by a component having a reflection performance equivalent to that of the bottom surface 21 and the side surface 122. Good.

Further, as shown in FIGS. 7 and 9, the inclined surface 123 is formed so as to face the LED 10 b arranged closest to the inclined surface 123 as in the first embodiment. As shown in FIG. 9, the light P <b> 3 emitted from the LED 10 b toward the corner of the reflecting member 120 is reflected by the inclined surface 123 in a direction perpendicular to the bottom surface 21 (C direction). Note that a point Q101 in FIG. 9 indicates a position where the light emitted from the LED 10b and reflected by the inclined surface 123 in the C direction reaches the inclined surface 123.

Further, in the second embodiment, as shown in FIG. 8, the inclined surface 123 is disposed between the intersection line L <b> 102 of the two adjacent side surfaces 122 and the LED 10 b closest to the inclined surface 123.

In the second embodiment, as shown in FIG. 10, the LED 10 is configured so that the luminous intensity in the direction inclined about 50 ± 20 degrees with respect to the bottom surface 21 is the highest. Note that the two-dot chain line in FIG. 10 represents the relative luminous intensity of the light emitted from the LED 10.

Moreover, as LED10 of such a characteristic, as shown, for example in FIG. 11, it is arrange | positioned on the light emitting element part 11 and the upper side (light emission side) of the light emitting element part 11, and the spreading angle of the light radiate | emitted from LED10 You may comprise with the lens member 12 which enlarges. Further, the light emitting surface 12a of the lens member 12 may be formed in a substantially convex shape, and the central portion of the light emitting surface 12a may be formed in a concave shape.

And in 2nd Embodiment, as shown in FIG. 10, the center part of the inclined surface 123 is arrange | positioned in the direction which inclined about 50 +/- 20 degree | times from LED10b. For this reason, light with the highest luminous intensity among the light emitted from the LED 10 b is reflected by the inclined surface 123 in a direction perpendicular to the bottom surface 21 (C direction).

The remaining structure of the second embodiment is the same as that of the first embodiment.

In the second embodiment, as described above, the inclined surface 123 is disposed between the intersection line L102 of the two adjacent side surfaces 122 and the LED 10b disposed closest to the inclined surface 123. Thereby, since the inclined surface 123 can be disposed close to the LED 10 as in the first embodiment, the amount of light reflected by the inclined surface 123 can be increased. As a result, it is possible to further suppress the luminance of the corner portion of the liquid crystal display panel 2 from being lowered.

In the second embodiment, as described above, the inclined surface 123 is formed in a rhombus shape so that the width of the central portion of the inclined surface 123 is the width of the portion closest to the bottom surface 21 of the inclined surface 123, and The width of the portion farthest from the bottom surface 21 can be made larger. That is, it is possible to increase the area of the portion (the central portion of the inclined surface 123) where the light having the highest luminous intensity reaches among the light emitted from the LED 10b. Thereby, more light traveling toward the inclined surface 123 can be reflected in a direction perpendicular to the bottom surface 21 (C direction). As a result, it is possible to further suppress the luminance of the corner portion of the liquid crystal display panel 2 from being lowered, and thus it is possible to further suppress the luminance of the liquid crystal display panel 2 from becoming uneven.

In the second embodiment, the inclined surface 123 is provided separately from the bottom surface 21 and the plurality of side surfaces 122 as described above. Thereby, the inclined surface 123 can be easily formed in a rhombus shape. Further, since the area of the inclined surface 123 can be easily increased, it is possible to more easily suppress the luminance of the corner portion of the liquid crystal display panel 2 from being lowered.

The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

(Third embodiment)
In the third embodiment, the case where the inclined surface 223 is formed in an elliptical shape will be described with reference to FIG. 12, unlike the first and second embodiments.

In the liquid crystal display device according to the third embodiment of the present invention, as shown in FIG. 12, the inclined surface 223 of the reflecting member 220 is formed in an elliptical shape, and the width of the central portion of the inclined surface 223 is the inclined surface 223. The width of the portion closest to the bottom surface 21 and the width of the portion farthest from the bottom surface 21 are larger.

In the third embodiment, the inclined surface 223 is formed separately from the bottom surface 21 and the side surface 122 as in the second embodiment. That is, in the third embodiment, the side surface 122 is formed by bending the end portion of the bottom surface 21, and the inclined surface 223 is attached to the bottom surface 21 and the side surface 122. Note that a point Q201 in FIG. 12 indicates a position where the light emitted from the LED 10b and reflected by the inclined surface 223 in the C direction reaches the inclined surface 223.

Other structures and effects of the third embodiment are the same as those of the second embodiment.

In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims, and further includes meanings equivalent to the scope of claims and all modifications within the scope.

For example, in the above-described embodiment, an example in which the display device is applied to a liquid crystal display device has been described. However, the present invention is not limited thereto, and may be applied to a display device other than the liquid crystal display device.

In the above-described embodiment, the backlight device has been described as an example of the lighting device. However, the present invention is not limited to this and can be applied to lighting devices other than the backlight device.

Moreover, although the example using LED as a light source was shown in the said embodiment, this invention is not limited to this, For example, you may use light sources other than semiconductor light emitting elements, such as a semiconductor laser element. .

Further, in the above-described embodiment, an example in which the inclined surface is formed in a triangular shape, a rhombus shape, or an elliptical shape has been described. It can be formed in any shape.

Moreover, in the said embodiment, although the reflection member was shown about the example formed by bending the edge part of a bottom face, for example, this invention is not restricted to this, A reflection member is formed by resin molding using a shaping die. It may be formed.

Further, unlike the above embodiment, one inclined surface may be formed by a plurality of surfaces, a bent surface, or the like.

1 Liquid crystal display device (display device)
2 Liquid crystal display panel (illuminated member, display panel)
3 Backlight device (lighting device)
10 LED (light source)
10b LED (light source arranged closest to the inclined surface)
20, 120, 220 Reflective member 21

Bottom surface

22, 122

Side surface

23, 123, 223 Inclined surface L2, L102 Intersection line S1, S2 Extended surface

Claims

A light source;
A reflection member that reflects light from the light source to the illuminated member side;
The reflective member includes a bottom surface, a plurality of side surfaces, and a plurality of inclined surfaces provided at corner portions of the reflective member,
The inclined surface is inclined with respect to the bottom surface and the adjacent side surface, and is inclined so that an angle formed with an extended surface extending the bottom surface outward is smaller than 90 degrees. A lighting device.
The lighting device according to claim 1, wherein the plurality of side surfaces are inclined such that an angle formed with an extended surface extending from the bottom surface to the outside is smaller than 90 degrees.
The lighting device according to claim 1 or 2, wherein the inclined surface is formed so as to face a direction of a light source disposed closest to the inclined surface in a plan view.
The inclined surface is disposed between an intersection line of two adjacent side surfaces or an intersection line of an extended surface extending from the two adjacent side surfaces and a light source disposed closest to the inclined surface. The lighting device according to any one of claims 1 to 3, wherein:
The lighting device according to any one of claims 1 to 4, wherein the inclined surface is formed in a triangular shape.
The width of the central portion of the inclined surface is larger than the width of the portion closest to the bottom surface of the inclined surface and the width of the portion farthest from the bottom surface. The lighting device according to item 1.
The lighting device according to claim 6, wherein the inclined surface is formed in a rhombus shape or an ellipse shape.
The lighting device according to any one of claims 1 to 7, wherein the inclined surface is formed integrally with the bottom surface and the plurality of side surfaces.
The lighting device according to any one of claims 1 to 7, wherein the inclined surface is provided separately from the bottom surface and the plurality of side surfaces.
10. The lighting device according to claim 1, wherein the light source includes a light emitting diode.
The lighting device according to any one of claims 1 to 10,
A display device comprising a display panel illuminated by the illumination device.