Planar lighting device and liquid crystal display device using it
A lighting device, planar technology, applied to lighting devices, lighting and heating equipment, light guides of lighting systems, etc., can solve the problems of difficult lamp replacement, reduced workability, and more work time
Inactive Publication Date: 2006-11-22
SHARP KK
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Problems solved by technology
In addition, when the metal member for reinforcement is in the shape of a notch, when assembling the surface light source device, as a method of attaching the lamp, it is necessary to adopt a method of inserting the lamp into the lamp reflector while sliding the lamp in the longitudinal direction. In order not to damage the lamp due to the notch, it takes a lot of work time, so the workability at the time of assembly is reduced
For the same reason, it is not easy to replace the lamp
Therefore, in the structure described in Japanese Patent Application Laid-Open No. 2000-331521, a large strength cannot be obtained as a positional displacement prevention mechanism, or the strength of the metal member for reinforcement will decrease.
This hinders the narrowing of the frame of the display device and cannot achieve sufficient impact resistance.
Method used
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[0071] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0072] [1. The first embodiment]
[0073] [1-1, structure]
[0074] The liquid crystal display device according to the first embodiment of the present invention is used, for example, as a liquid crystal display module of a notebook personal computer, and has a backlight unit as a planar lighting device. FIG. 1 is a rear plan view showing a schematic structure of the backlight unit 112, that is, a plan view viewed from the side opposite to the display surface. figure 2 It is a cross-sectional view showing the main part of the liquid crystal display device of this embodiment including the backlight unit 112, and corresponds to the cross-sectional view taken along line B-B in FIG. 1 . In addition, in figure 2 In the middle, the bottom is the direction of the display surface (towards the person looking at the display), figure 2 , the up-down direction is the same as ...
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In the planar lighting device of the present invention, both ends of the light incident surface (3i) of the light guide plate (3) on the frame-shaped base (7) supporting the prism light guide plate (3) in the backlight unit of the liquid crystal display device The stainless steel baffle fittings (11A, 11B) as separate bodies are installed near the upper part. These baffle fittings (11A, 11B) are configured such that their claws (11Ap, 11Bp) enter from the side to the inside of the light incident surface (3i) and are sandwiched between the light incident surface (3i) of the light guide plate (3) and the lamp. (8) The state between (light brackets (10)). Such bezel fittings (11A, 11B) can prevent the light guide plate (3) from moving toward the lamp (8) when an impact is applied to the liquid crystal display device from the outside, thereby improving impact resistance.
Description
technical field [0001] The present invention relates to a sidelight-type planar lighting device having a light guide that injects light from a light source from the side, and a liquid crystal display device using such a planar lighting device as an illuminating device such as a backlight unit. . Background technique [0002] In recent years, liquid crystal display devices have attracted attention due to their low power consumption, light weight, and thin profile, and their application fields have expanded. For example, liquid crystal display devices are used as monitors for consumer projections, monitors for industrial equipment, and display units of information portable terminals. However, since liquid crystal itself does not emit light, it is often incorporated in a liquid crystal display device such as a backlight unit, which is a planar lighting device for illuminating the backside of a liquid crystal panel. [0003] As a backlight unit used in a liquid crystal display...
Claims
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IPC IPC(8): G02F1/1335F21V8/00G02B6/00F21Y103/00F21Y103/37G02F1/13G02F1/13357G09F9/00
CPCG02B6/0088G02F1/133308G02F1/133615G02F2201/503G02F1/1335
Inventor 胜田恭敏小仓健小野智史
Owner SHARP KK