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Illumination device and display device

A lighting device and light source technology, which is applied in the direction of light guides, instruments, light guides, etc. of the lighting system, can solve the problems of reduced light quantity, complex shape of light guide plate, longer optical path length, etc., and achieve the effect of increased brightness

Inactive Publication Date: 2019-04-26
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the surface light-emitting device described in Patent Document 1, since most of the substrate on which the LEDs are mounted enters the light guide plate, the shape of the light guide plate becomes complicated near the light source, which may cause a decrease in the amount of light emitted from the light guide plate. reduce
In addition, since the thickness of the light guide plate increases the amount of the substrate entering the light guide plate, the optical path length of the light propagating inside the light guide plate becomes longer
If the optical path length becomes longer, the amount of light absorbed by the light guide plate will also increase, resulting in a decrease in the amount of light emitted from the light guide plate.

Method used

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  • Illumination device and display device
  • Illumination device and display device
  • Illumination device and display device

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Experimental program
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Embodiment approach 1

[0028] according to Figure 1 to Figure 5 Embodiment 1 of the present invention will be described. In this embodiment, a liquid crystal display device (display device) 10 is illustrated. In addition, X-axis, Y-axis, and Z-axis are shown in part of each drawing, and the direction of each axis is drawn as the direction shown in each drawing. Additionally, the figure 2 and Figure 4 The upper side shown in the figure is set as the front side, and the lower side in this figure is set as the back side.

[0029] The liquid crystal display device 10 of this embodiment is as figure 1 As shown, it is formed in a horizontally long (long dimension) square shape (rectangular shape) as a whole, and includes a liquid crystal panel (display panel) 11 that displays images and a backlight as an external light source that supplies light for display to the liquid crystal panel 11. As for the device (illumination device) 12, the liquid crystal panel 11 and the backlight unit 12 are integral...

Embodiment approach 2

[0054] pass Figure 6 Embodiment 2 of the present invention will be described. In this second embodiment, an embodiment in which the arrangement of the LED board 114 is changed with respect to the light guide plate 115 is shown. In addition, redundant descriptions of the same configurations, actions, and effects as those of the first embodiment will be omitted.

[0055] Such as Figure 6 As shown, the LED substrate 114 according to this embodiment is arranged such that the extension portion 20 overlaps the light guide plate 115 on the front side. In detail, in the LED board|substrate 114, the back side board surface among a pair of front and back board surfaces is the mounting surface 114a on which each LED113 is mounted. Therefore, in each LED 113 , the surface on the front side is the mounted surface 113 b in contact with the mounting surface 114 a of the LED board 114 . In addition, the light guide plate 115 is fixed in the following state: the front side plate surface ...

Embodiment approach 3

[0057] pass Figure 7 Embodiment 3 of the present invention will be described. In this third embodiment, a structure in which the thickness of a pair of light guide plates 215 is changed from the above-mentioned embodiment is shown. In addition, redundant descriptions of the same configurations, actions, and effects as those of the first embodiment will be omitted.

[0058] Such as Figure 7 As shown, in the light guide plate 215 according to this embodiment, the plate thickness is larger than the height dimension of each LED 213 . Therefore, the light guide plate 215 is configured such that the light-emitting plate surface 15b on the side opposite to the light-emitting opposite plate surface 215c in contact with the extension portion 220 of the LED substrate 214 is smaller than the mounted surface 213b in contact with the LED substrate 214 among the outer peripheral surfaces of each LED 213 . The mounted opposite surface 213c on the opposite side protrudes further toward t...

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PUM

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Abstract

An illumination device comprises: an LED (13); an LED substrate (14) having a mounting surface (14a) on which the LED (13) is mounted in a manner such that the mounting surface contacts a mounted surface (13b) of the LED (13), the LED substrate (14) including an LED overlapping part (18) that overlaps the LED (13) and an extending part (20) that extends from the LED overlapping part (18) toward aside in which a light-emitting surface (13a) is directed; and a light guide plate (15) having a light-incident end surface (15a) on which light from the LED (13) is incident, a light-exiting plate surface (15b) from which the light exits, and an anti-light-exiting plate surface (15c), the light guide plate (15) being provided integrally with the LED (13) and the LED substrate (14) in a manner suchthat the light-incident end surface (15a) is in direct contact with the light-emitting surface (13a) of the LED (13), and the light-exiting plate surface (15b) or the anti-light-exiting plate surface(15c) is in direct contact with the mounting surface (14a) of the extending part (20).

Description

technical field [0001] The invention relates to an illumination device and a display device. Background technique [0002] As an example of a surface emitting device included in a conventional liquid crystal display device, a device described in Patent Document 1 below is known. In the surface light-emitting device described in Patent Document 1, when injection-molding the light guide plate made of acrylic, the substrate unit is embedded and molded. In the substrate unit, LEDs as point light sources are connected to the upper surface of the substrate on which the circuit is formed. The base unit is injection-molded so that the lower surface is exposed. The substrate unit is integrated with the light guide plate at portions other than the exposed portion. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2001-143517 [0006] Technical problem to be solved by the present invention [0007] In the surface li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
CPCG02B6/0068G02B6/009G02B6/0013G02B6/0033G02B6/0083G02B6/0091
Inventor 徐庆乐
Owner SHARP KK