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Lighting unit and display provided with the same

A technology for lighting devices and light guide plates, which is applied to cooling/heating devices of lighting devices, components of lighting devices, lighting devices, etc. The effect of high uniformity

Inactive Publication Date: 2012-01-11
HITACHI CONSUMER ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems: since a plurality of light guide plates are required, the number of parts increases, and a plurality of light guide plates are arranged in a row, and light sources are arranged in close proximity to each light guide plate, so the load of assembly becomes large and the manufacturing cost becomes high.

Method used

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  • Lighting unit and display provided with the same
  • Lighting unit and display provided with the same
  • Lighting unit and display provided with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] figure 1 An example showing the lighting device of the present invention is a partial cross-sectional view showing the schematic structure of its main parts. In addition, for convenience of description, scales are not always shown in the drawings exactly.

[0063] The illuminating device 1 is disposed on the back of a display panel (not shown) that displays an image by adjusting the amount of transmitted light, and is suitable for illuminating the display panel from the inside. As the display panel, a display panel that displays an image by adjusting the transmitted light amount of incident light can be used, and in particular, a liquid crystal display panel that can realize matrix display with a long life can be used.

[0064] The lighting device 1 includes: a light guide plate 10; light source groups 20-23 composed of a plurality of light sources arranged in grooves formed in the light guide plate 10; a light reflection unit 60 arranged inside the light guide plate 1...

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PUM

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Abstract

This lighting unit can control luminance in a plurality of block areas independently, and minimize luminance unevenness caused by discretely arrayed light sources, with a reduced number of parts. The lighting unit comprises: a light guide plate (10) having a first and a second grooves (18, 19) formed therein; a first light source group (21) accommodated in the first groove; and a second light source group (22) accommodated in the second groove; the light guide plate (10) having a first light mixing area (13), a first light emitting area (14) and a second light mixing area (15); in the first light mixing area, the thickness of the light guide plate progressively increasing away from the first light source group; in the second light mixing area, the thickness of the light guide plate progressively increasing away from the second light source group; and in the first light emitting area, the light guide plate being flat-plate-like.

Description

technical field [0001] The present invention relates to a lighting device and an image display device including the lighting device. Background technique [0002] Display devices are media that visually provide information to human beings, and have become an important existence for human beings and society in today's advanced information society. The display device can be roughly divided into CRT (Cathode Ray Tube, cathode ray tube), PDP (Plasma Display Panel, plasma display panel) and other light-emitting display devices, and liquid crystal display devices, ECD (Electrochromic Display, electrochromic display) and Non-luminous display devices such as EPID (Electrophoretic Image Display, electrochromic image display). [0003] Non-luminous display devices display images by adjusting the amount of transmitted (or reflected) light. Among them, the performance of liquid crystal display devices has been significantly improved in recent years, and they are widely used as displays...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V19/00F21V8/00F21V7/00F21V29/00F21V5/02G09F9/30
CPCG02B6/0073G02B6/0038G02B6/0046G02B6/0021G02B6/0068G02B6/0053
Inventor 足立昌哉津村诚
Owner HITACHI CONSUMER ELECTRONICS CORP
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