Illumination device, display device, and television receiving device

Abstract

To provide a lighting device that reduces the number of components for supporting an optical member for a lighting device, and to provide a display device and a television receiver.SOLUTION: In a display device 200a, a lighting device 100a includes a substrate 1 including a bent part 7 bent toward an optical member 3 (light diffusion plate 5, optical sheet 6) and supporting the optical member 3 with the bent part 7.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a lighting device, a display device, and a television receiving device. [Background technology]

[0002] There is known a lighting device equipped with an optical member. The optical member includes a light diffusion plate, an optical sheet, etc. In the lighting device disclosed in Patent Document 1, a support pin is provided on an LED (Light Emitting Diode) substrate, and the optical member is supported by the support pin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication WO2012 / 023458 Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting device disclosed in Patent Document 1, a large number of support pins must be provided in addition to the LED substrate in order to support the optical members, which causes a problem of an increased number of parts.

[0005] An object of one aspect of the present invention is to reduce the number of parts. [Means for solving the problem]

[0006] An illumination device according to one aspect of the present invention comprises a substrate having a light source mounting surface on which a light source is provided, and an optical element that diffuses light emitted by the light source, the substrate having a bent portion that is bent toward the optical element, and the bent portion supports the optical element.

[0007] A display device according to an aspect of the present invention includes the lighting device according to an aspect of the present invention.

[0008] A television receiving device according to an aspect of the present invention includes a display device according to an aspect of the present invention. Effect of the Invention

[0009] According to one aspect of the present invention, the number of parts can be reduced. [Brief description of the drawings]

[0010] [Figure 1] 1 is an exploded perspective view showing a schematic configuration of a television receiving device according to each embodiment of the present invention. [Diagram 2] 1 is a partial cross-sectional view of a display device according to a first embodiment of the present invention. [Diagram 3] FIG. 5 is a partial cross-sectional view of a display device according to a second embodiment of the present invention. [Figure 4] FIG. 11 is a partial cross-sectional view of a display device according to a third embodiment of the present invention. [Diagram 5] FIG. 11 is a partial cross-sectional view of a display device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. For the sake of convenience, the same reference numerals are used to designate components having the same functions as those described above, and the description thereof will not be repeated.

[0012] 1 is an exploded perspective view showing a schematic configuration of a television receiving device 300 according to each embodiment of the present invention. The television receiving device 300 includes a display device 200, a cabinet 201, a power source 202, and a tuner 203. The cabinet 201 is made up of a front housing 201a and a rear housing 201b. The display device 200 is sandwiched between the housings 201a and 201b and accommodated in the cabinet 201.

[0013] [Embodiment 1] 2 is a partial cross-sectional view of a display device 200a according to the first embodiment of the present invention. The display device 200a is a first example of the display device 200. The display device 200a includes an illumination device 100a, a panel 101, a chassis 102, and a frame 103. The illumination device 100a includes a substrate 1, a plurality of light sources 2, an optical member 3, and a light source driver 4.

[0014] The substrate 1 has a light source mounting surface 1a on which a plurality of light sources 2 are provided. The light sources 2 are, for example, LEDs, but are not limited to this and may be any known light source.

[0015] The optical member 3 is composed of a light diffusion plate 5 and an optical sheet 6. The optical sheet 6 is provided by being overlaid on the light diffusion plate 5. The light diffusion plate 5 has a function of transmitting and diffusing light emitted by the multiple light sources 2. Examples of the optical sheet 6 include a diffusion sheet that diffuses the light incident from the light diffusion plate 5, a lens sheet that collects the light, a polarizing sheet that polarizes the light, and a combination of two or more of these.

[0016] The light source driver 4 drives the multiple light sources 2. When each of the multiple light sources 2 is an LED, the light source driver 4 can be configured by a well-known LED driver. Of course, as the light source driver 4, a well-known light source driver according to the type of the light source 2 can be applied.

[0017] The panel 101 is a light-transmitting panel provided so as to cover the optical member 3 from the side opposite the substrate 1. The chassis 102 houses the lighting device 100a. The frame 103 is provided to fix the panel 101 at the edge of the panel 101, and may be, for example, a part or all of a known bezel, or a part or all of a frame provided separately from the bezel.

[0018] In the lighting device 100a, the substrate 1 has a bent portion 7. The bent portion 7 is a portion of the substrate 1 that is bent toward the optical member 3. In other words, the bent portion 7 is a portion of the substrate 1 that is bent in the emission direction D1 of the light from the multiple light sources 2. In the lighting device 100a, the bent portion 7 is aligned along a direction D2 perpendicular to the light source mounting surface 1a. The portion of the substrate 1 other than the bent portion 7 is a non-bent portion 8.

[0019] One method for forming bent portion 7 in substrate 1 is to apply force to a single piece of substrate 1 to bend the substrate 1. Another method for forming bent portion 7 in substrate 1 is to configure substrate 1 with two or more pieces and connect two adjacent pieces with a hinge or the like.

[0020] The substrate 1 supports the optical member 3 at the bent portion 7. Specifically, the bent portion 7 supports a surface 3a of the optical member 3 that faces the substrate 1.

[0021] According to the lighting device 100a, it is possible to reduce the number of parts because there is no need to provide support pins in addition to the substrate 1 in order to support the optical member 3. Furthermore, according to the lighting device 100a, it is possible to suppress a decrease in the heat dissipation effect of the substrate 1 because there is no need to form holes in the substrate 1 for providing support pins.

[0022] In the lighting device 100a, the light source driver 4 is provided on a surface 7b of the bending portion 7 opposite to the light source mounting surface 1a. In addition, the surface 7a is the surface of the bending portion 7 on the light source mounting surface 1a side. Specifically, the surface 7a is a surface belonging to the light source mounting surface 1a in a state before the bending portion 7 is formed on the substrate 1. Specifically, the surface 7b is a surface belonging to the surface 1b of the substrate 1 opposite to the light source mounting surface 1a in a state before the bending portion 7 is formed on the substrate 1. As a result, the light source driver 4 can be disposed between the non-bending portion 8 and the optical member 3 in the thickness direction of the lighting device 100a. Therefore, the lighting device 100a can be made thinner. In addition, this can prevent the light emitted by the multiple light sources 2 from hitting the light source driver 4. Therefore, it is possible to suppress the light source driver 4 from absorbing the light or reflecting the light in an unexpected direction.

[0023] In the illumination device 100a, it is assumed that the surface 3a is flat (in other words, the optical member 3 is not bent at all). In this assumption, the length L1 from the bent portion 9 of the substrate 1 to the tip 10 of the bent portion 7 is the same as the distance L2 between the light source mounting surface 1a and the surface 3a along the direction D2. The distance L2 in this assumption is, for example, 5 mm. On the other hand, when the optical member 3 is bent toward the substrate 1, the distance L2 becomes smaller depending on the position in the surface 3a, and the length L1 may be smaller than the maximum value of the distance L2 (i.e., the distance L2 in the assumption). From this, it can be seen that the bent portion 7 may be formed shorter than the distance L2 in the assumption depending on the allowable amount of bending of the optical member 3.

[0024] [Embodiment 2] 3 is a partial cross-sectional view of a display device 200b according to a second embodiment of the present invention. The display device 200b is a second example of the display device 200.

[0025] The difference between the display device 200a and the display device 200b is that the display device 200a includes an illumination device 100a, whereas the display device 200b includes an illumination device 100b. The differences between the illumination device 100a and the illumination device 100b are as follows.

[0026] In the lighting device 100a, the bent portion 7 is aligned along a direction D2 perpendicular to the light source mounting surface 1a. On the other hand, in the lighting device 100b, the bent portion 7 is inclined from the direction D2 perpendicular to the light source mounting surface 1a.

[0027] The inclination angle of the bent portion 7 with respect to the direction D2 is defined as angle θ. The magnitude of the angle θ is not particularly limited and is within the range of 0°<θ<90°. The larger the angle θ, the longer the length of the bent portion 7 in cross-sectional view (e.g., length L1 in FIG. 2) becomes. Therefore, for example, the angle θ may be set depending on how long the length can be increased.

[0028] 3, the bent portion 7 is inclined so as to be positioned more outside the lighting device 100b as it approaches the optical member 3. On the other hand, the bent portion 7 may be inclined so as to be positioned more outside the lighting device 100b as it moves away from the optical member 3. In other words, if the angle θ is set to an angle that increases counterclockwise from the direction D2, the angle θ is positive in FIG. 3, but the angle θ may also be negative.

[0029] According to the above configuration, the angle at which the light emitted from the multiple light sources 2 strikes the bent portion 7 can be controlled in accordance with the magnitude of the angle θ, making it possible to control the light distribution characteristics of the illumination device 100b.

[0030] [Embodiment 3] 4 is a partial cross-sectional view of a display device 200c according to a third embodiment of the present invention. The display device 200c is a third example of the display device 200.

[0031] The difference between the display device 200a and the display device 200c is that the display device 200a includes an illumination device 100a, whereas the display device 200c includes an illumination device 100c. The differences between the illumination device 100a and the illumination device 100c are as follows.

[0032] In the lighting device 100a, the light source driver 4 is provided on a surface 7b of the bent portion 7 opposite the light source mounting surface 1a. On the other hand, in the lighting device 100c, the light source driver 4 is provided on a surface 7a of the bent portion 7 on the light source mounting surface 1a side.

[0033] According to the above configuration, in a plan view of the lighting device 100c, the light source driver 4 can be disposed further inside the bent portion 7 in the lighting device 100c. Therefore, a display device 200c with a narrow frame can be realized.

[0034] [Embodiment 4] 5 is a partial cross-sectional view of a display device 200d according to a fourth embodiment of the present invention. The display device 200d is a fourth example of the display device 200.

[0035] The difference between the display device 200a and the display device 200d is that the display device 200a includes the lighting device 100a, whereas the display device 200d includes the lighting device 100d. The differences between the lighting device 100a and the lighting device 100d are as follows.

[0036] In the lighting device 100a, the light source driver 4 is provided on a surface 7b of the bending portion 7 opposite to the light source mounting surface 1a. On the other hand, in the lighting device 100d, the light source driver 4 is provided outside the bending portion 7 of the substrate 1. That is, in the lighting device 100d, the light source driver 4 is provided in the non-bending portion 8. Note that, although the light source driver 4 is provided on the surface 1b in the lighting device 100d, it may be provided on the light source mounting surface 1a.

[0037] According to the above configuration, in a plan view of the lighting device 100d, the light source driver 4 can be disposed further inside the bent portion 7 in the lighting device 100d. Therefore, a display device 200d with a narrow frame can be realized.

[0038] The illumination device 100d also includes a heat diffusion member 11. The heat diffusion member 11 diffuses heat generated in the display device 200d, such as heat generated due to light emission from the multiple light sources 2 and heat emitted by the light source driver 4. The heat diffusion member 11 is provided on the surface 1b. The heat diffusion member 11 is provided in a form that covers the light source driver 4.

[0039] According to the above-mentioned configuration, the heat generated by the light source driver 4 can be sufficiently diffused, and the display device 200d with a narrow frame can be realized as described above.

[0040] [Additional Notes] In each of the lighting devices 100a to 100d, the end of the substrate 1 is bent at a bent portion 7, and the bent portion 7 supports the optical member 3 near the edge of the optical member 3, but is not limited to this. It is arbitrary which portion of the substrate 1 is to be the bent portion 7, and which portion of the optical member 3 the bent portion 7 supports.

[0041] 2 to 5, when the support form of the optical member 3 by the bent portions 7 is considered to be point-like, taking into consideration the depth direction in each of Fig. 2 to 5, the support form of the optical member 3 by the bent portions 7 is not limited to point-like but may also be linear. In particular, if the bent portions 7 support the optical member 3 in a line surrounding the non-bent portions 8, leakage of light emitted by the multiple light sources 2 can be prevented, which is particularly suitable for a local dimming method in which illumination is provided for each of multiple areas.

[0042] The display devices 200a to 200d provide the same effects as the lighting devices 100a to 100d, respectively. Both the lighting devices 100a to 100d and the display devices 200a to 200d are included in the scope of the present invention.

[0043] The television receiving device 300 includes any one of the display devices 200a to 200d as the display device 200, and therefore provides the same effects as any one of the display devices 200a to 200d. The television receiving device 300 is also included in the scope of the present invention.

[0044] 〔summary〕 The lighting device according to aspect 1 of the present invention comprises a substrate having a light source mounting surface on which a light source is provided, and an optical element that diffuses light emitted by the light source, the substrate having a bent portion that is bent toward the optical element, and the bent portion supports the optical element.

[0045] According to the above-mentioned configuration, since there is no need to provide a support pin in addition to the substrate in order to support the optical member, the number of parts can be reduced.

[0046] The lighting device according to a second aspect of the present invention is the lighting device according to the first aspect, further comprising a light source driver that drives the light source, the light source driver being provided on a surface of the bent portion opposite to the light source mounting surface.

[0047] According to the above configuration, the lighting device can be made thinner. Also, according to the above configuration, the light emitted by the light source can be prevented from hitting the light source driver. Therefore, it is possible to prevent the light source driver from absorbing the light or reflecting the light in an unexpected direction.

[0048] The lighting device according to a third aspect of the present invention is the lighting device according to the first aspect, further comprising a light source driver that drives the light source, the light source driver being provided on a surface of the bent portion on the side of the light source mounting surface.

[0049] According to the above-mentioned configuration, the light source driver can be disposed further inside the bent portion of the lighting device in a plan view of the lighting device, thereby realizing a display device with a narrow frame.

[0050] The lighting device according to a fourth aspect of the present invention is the lighting device according to the first aspect, further comprising a light source driver that drives the light source, the light source driver being provided on the board outside the bent portion.

[0051] According to the above-mentioned configuration, the light source driver can be disposed further inside the bent portion of the lighting device in a plan view of the lighting device, thereby realizing a display device with a narrow frame.

[0052] The lighting device according to a fifth aspect of the present invention is the lighting device according to the fourth aspect, further comprising a heat diffusion member covering the light source driver.

[0053] According to the above configuration, it is possible to realize a display device with a narrow frame while sufficiently diffusing the heat generated by the light source driver.

[0054] A sixth aspect of the present invention relates to an illumination device according to any one of the first to fifth aspects, wherein the bent portion is inclined from a direction perpendicular to the light source mounting surface.

[0055] According to the above configuration, the angle at which the light emitted by the light source hits the bent portion can be controlled depending on the magnitude of the inclination angle of the bent portion relative to the direction perpendicular to the light source mounting surface, making it possible to control the light distribution characteristics of the lighting device.

[0056] A display device according to a seventh aspect of the present invention includes the illumination device according to any one of the first to sixth aspects.

[0057] According to the above configuration, the display device can achieve the effects of the lighting device according to the present invention.

[0058] A television receiving device according to an eighth aspect of the present invention includes the display device according to the seventh aspect.

[0059] According to the above configuration, the effects of the display device of the present invention can be obtained in a television receiving device.

[0060] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments. [Explanation of symbols]

[0061] 1 Board 1a Light source mounting surface 2 light source 3 Optical Components 4 Light source driver 7 Bend 7a: Surface of the bent portion on the side where the light source is mounted 7b Surface opposite to the light source mounting surface at the bent portion 11 Heat diffusion material 100a, 100b, 100c, and 100d Illumination devices 200, 200a, 200b, 200c, and 200d Display devices 300 Television receiving equipment D2: Perpendicular to the light source mounting surface

Claims

1. a substrate having a light source mounting surface on which a light source is provided; an optical member that diffuses light emitted by the light source; a light source driver that drives the light source, the substrate has a bent portion bent toward the optical member, and the bent portion supports the optical member; the bent portion is a portion where the substrate is bent, The bent portion is provided on the outer side of the light source mounting surface, The light source driver is provided on a surface of the bent portion on the side of the light source mounting surface.

2. The lighting device according to claim 1 , wherein the bent portion is inclined from a direction perpendicular to the light source mounting surface.

3. The lighting device according to claim 1 ; and a chassis that houses the lighting device, The display device, wherein the bent portion has a surface opposite to the light source mounting surface in contact with the chassis.

4. A television receiving device comprising the display device according to claim 3.

Images