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Illuminating device and liquid crystal display device

A technology for lighting devices and liquid crystal panels, applied in lighting devices, lighting and heating equipment, instruments, etc., can solve the problem of unevenness, achieve the effects of suppressing the expansion of half-value angle of brightness, reducing uneven eyeballs, and suppressing the reduction of brightness

Inactive Publication Date: 2010-12-08
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the light emitted from the backlight of the liquid crystal display device, unevenness occurs due to various structural elements such as the light source, the light guide plate, and the prism sheet.

Method used

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  • Illuminating device and liquid crystal display device
  • Illuminating device and liquid crystal display device
  • Illuminating device and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Hereinafter, embodiments of the lighting device and the liquid crystal display device according to the present invention will be described with reference to the drawings.

[0049] figure 1 It is a cross-sectional view showing a liquid crystal display device 1 according to an embodiment of the present invention. The liquid crystal display device 1 includes a liquid crystal display panel (liquid crystal panel with microlens) 50 and an illuminating device 10 arranged on the lower surface of the liquid crystal display panel 50 (on the side opposite to the display surface).

[0050] The lighting device 10 includes: a light guide plate 12; an LED (Light Emitting Diode) 14 as a light source arranged on one side of the light guide plate 12; a reflecting plate 16 arranged under the light guide plate 12; and a light guide plate 12 The upper surface (liquid crystal panel side) of the prism sheet 18; and the anisotropic diffusion plate 11 arranged between the light guide plate 12 and t...

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PUM

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Abstract

An illuminating device (10) is provided with a plurality of light sources (14) which emit light, a light guiding plate (12) for propagating the emitted light, and an anisotropic diffusion plate (11) arranged at least on a part of the light guiding plate (12), on the side of the light source (14), for diffusing light propagated through the light guiding plate (12). The anisotropic diffusion plate (11) diffuses light in the plane direction of the light guiding plate (12) more in the parallel direction than in a direction vertical to the arrangement direction of the light sources (14). Thus, appearance of the image is improved while suppressing widening of luminous half-value angle of light and deterioration of luminance due to diffusion is suppressed.

Description

Technical field [0001] The present invention relates to a lighting device and a liquid crystal display device. Background technique [0002] In recent years, liquid crystal display devices have been widely used as display devices such as monitors, projectors, portable information terminals, and mobile phones. Liquid crystal display devices generally change the transmittance (or reflectance) of a liquid crystal display panel in accordance with a drive signal, and modulate the intensity of light from a light source irradiated on the liquid crystal display panel to display images and characters. Among the liquid crystal display devices, there are a direct-view display device that directly observes the image displayed on the liquid crystal display panel, and a projection type display device that magnifies and projects the image displayed on the liquid crystal display panel on the screen by a projection lens ( Projector) etc. [0003] In a liquid crystal display device, a driving volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00G02F1/13357F21Y101/02
CPCG02B6/0051G02B6/0046G02B6/0038G02B5/02G02B6/0055G02B6/0053
Inventor 村尾岳洋臼仓奈留
Owner SHARP KK