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Illumination device and display device

A lighting device and light irradiation technology, applied to the light guide, light guide, optics and other directions of the lighting system, can solve the problems of not being able to get the color, not being able to get the brightness, and not fully mixing the light

Active Publication Date: 2017-12-19
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When the viewing angle of the light emitted by the light source is narrow, the desired brightness may not be obtained in the area close to the light source on the light emitting surface of the light guide plate
In addition, in the case of adopting the configuration of mixing lights of different colors as described above, in the area near the light source on the light-emitting surface of the light guide plate, the lights of each color may not be sufficiently mixed and the desired color may not be obtained.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0041] figure 1 It is a perspective view showing a schematic configuration of the display device 1 according to the first embodiment. The display device 1 can be applied to various devices such as smartphones, tablet terminals, mobile phone terminals, personal computers, television receivers, vehicle-mounted devices, game devices, and wearable terminals, for example.

[0042] The display device 1 includes a display panel 2, a lighting device 3 as a backlight, a driver IC chip 4 for driving the display panel 2, a control module 5 for controlling the operations of the display panel 2 and the lighting device 3, and an Flexible circuit boards FPC1 and FPC2 for transmitting control signals.

[0043] The display panel 2 includes a first substrate SUB1, a second substrate SUB2 facing the first substrate SUB1, and a liquid crystal layer LC positioned between the respective substrates SUB1 and SUB2. The display panel 2 has a display area DA where images are displayed. The display pa...

no. 2 Embodiment approach

[0083] A second embodiment will be described. Here, the difference from the first embodiment is focused, and the description of the same configuration as the first embodiment is omitted.

[0084] In this embodiment, the radiation intensity distribution of the light passing through the hole 40 which is a light-refracting structure is different from that of the first embodiment. Figure 11 It is a figure which shows an example of the radiation intensity distribution of this embodiment. In this radiation intensity distribution, among the regions A3 and A4 near both ends in the third direction Z, the radiation intensity in the region A3 is higher than the radiation intensity in the region A4.

[0085] exist Figure 12 to Figure 14 An example of a configuration for obtaining such a radiation intensity distribution is shown in . Each figure shows a cross section parallel to the XZ plane of the light guide plate 10 and the light source LS. The light source LS may be any one of th...

no. 3 Embodiment approach

[0094] A third embodiment will be described. Here, attention is paid to points different from the above-described respective embodiments, and descriptions of the same configurations as those of the respective embodiments are omitted.

[0095] This embodiment differs from the above-described embodiments in that the first lens that widens the viewing angle of the light from the light source LS before reaching the light refracting structure is arranged. use Figure 15 as well as Figure 16 An example of an arrangement form of the first lens will be described. Figure 15 It is a figure which shows the cross section parallel to the XY plane of the light guide plate 10, and the light source LS. Figure 16 It is a figure which shows the cross section parallel to the XZ plane of the light guide plate 10, and the light source LS. The light source LS may be any one of the above-mentioned light sources LS1-LS6.

[0096] The light source LS includes a light emitting element 50 and a ...

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PUM

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Abstract

In one embodiment, an illumination device comprises a light source, a light guide having an incidence surface irradiated by the light of the light source, and a concave or convex light refraction structure on the surface. The light guide has an irradiation direction irradiated by the light source, a thickness direction, and a width direction intersecting with the irradiation direction and the thickness direction. The light guide has a first surface in the thickness direction and a second surface in the width direction. A first length in the width direction is greater than a second length in the thickness direction, in the structure. The light from the light source having passed through the structure is reflected on the first surface and passes through the second surface.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims the benefit of priority of No. 2016-116118 filed in Japan on June 10, 2016, the entire contents of which are hereby incorporated by reference. technical field [0003] Embodiments of the present invention relate to a lighting device and a display device. Background technique [0004] For example, a display device such as a liquid crystal display device includes a display panel having pixels, and an illuminating device such as a backlight for illuminating the display panel. The lighting device includes a light source that emits light, and a light guide plate that is irradiated with light from the light source. [0005] The light from the light source enters the light guide plate from the end surface, propagates in the light guide plate, and exits from a light exit surface corresponding to one main surface of the light guide plate. By using a plurality of light sources that emit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02B6/00
CPCG02B6/0016G02F1/133615G02B6/0031G02B6/002G02B6/0068G02B6/0038
Inventor 小野田宪小村真一浅川阳一福间俊彦
Owner JAPAN DISPLAY INC