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Surface light source and display

A technology for display devices and surface light sources, applied to light sources, point light sources, lighting devices, etc., can solve the problems of low light utilization efficiency and difficulty in expecting high-brightness planar white lighting, and achieve improved display quality and high-quality lighting. Color display, realize the effect of color display

Inactive Publication Date: 2008-12-10
ENPLAS CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0010] However, in the surface light source device 100, the light guide length of the light emitted from each LED 104 is long, and the light guide direction of the light is changed by 180 degrees through the reflection surface of the reflector 103, so the utilization efficiency of light tends to decrease, and it is difficult to expect High-brightness planar white illumination

Method used

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  • Surface light source and display
  • Surface light source and display
  • Surface light source and display

Examples

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Embodiment Construction

[0045] (Structure of Surface Light Source Device and Display Device Equipped with it)

[0046] exist Figure 1 to Figure 3 (a) and (b) show the display device 1 according to this embodiment. figure 1 is an exploded perspective view showing the display device 1, figure 2 is in figure 1 In the cross-sectional view along the Y direction, image 3 (a) is a plan view showing the display device 1 , and shows a plan view drawn after removing the liquid crystal display panel (example of the member to be illuminated) 3 and the first and second light control members 4 and 5 . and image 3 (b) is a partial plan view of the display device 1 showing a mixed state of light from a plurality of LEDs.

[0047] The display device 1 has a liquid crystal display panel 3 that is planarly illuminated by a surface light source device 2 . The surface light source device 2 is provided with: a first light guide plate 6 and a second light guide plate 7 arranged vertically; 8 point light source...

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Abstract

The present invention relates to a surface light source device and a display device. The surface light source device for illuminating a display member of a display has first and second light guide plates stacked with a low-refractive layer interposed therebetween. The side edge on the light entrance side of one light guide plate is on the opposite side to the other, and the light emergence surface of the first light guide plate faces the back of the second light guide plate with a low-refractive layer. In each light guide plate, from the light entrance side to the far end side, a light emergence suppression region, a light emergence gradual increasing region, and a light emergence promoting region are formed. Though each light source group is composed of at least two point light sources outputting lights with different colors, the lights with different colors are mixed in the light emergence suppression region to prevent the output of light with non-uniform color phase from the emergence surface of the second light guide plate.

Description

technical field [0001] The present invention relates to a surface light source device and a display device having the surface light source device, which are applied to, for example, vehicle driving information devices, video cameras, digital cameras, electronic notebooks, portable telephones, portable electronic terminal equipment, electronic notebooks, personal computers, and liquid crystal televisions. A planar lighting mechanism on a computer (such as an LCD panel backlight adjustment mechanism) or a display device including the planar lighting mechanism. In addition, the present invention can also be applied to a planar lighting mechanism such as an advertisement board or a display device including the same. Background technique [0002] In general, displays are installed in devices such as vehicle driving information devices, video cameras, digital cameras, electronic notebooks, mobile phones, portable electronic terminal equipment, electronic notebooks, personal comput...

Claims

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Application Information

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IPC IPC(8): F21V8/00G02F1/13357F21Y101/02G02F1/1335
Inventor 山口昌男
Owner ENPLAS CORP
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