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Backlight device and liquid crystal display device

A liquid crystal display, liquid crystal display panel technology, applied in the direction of optical components, chemical instruments and methods, instruments, etc., can solve the problem that the color cannot be displayed, etc.

Inactive Publication Date: 2006-07-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some object colors cannot be displayed by monitors according to the sRGB standard

Method used

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  • Backlight device and liquid crystal display device
  • Backlight device and liquid crystal display device
  • Backlight device and liquid crystal display device

Examples

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Embodiment Construction

[0035] The transmissive liquid crystal display panel 1 shown in the drawings as an embodiment of the present invention will be described in detail below. The transmissive liquid crystal display panel 1 is used, for example, as a display panel in a television receiver. As shown in FIG. 1 , a transmissive liquid crystal display panel 1 has a transmissive color liquid crystal display panel 10 and a backlight box 4 disposed on the back side of the transmissive liquid crystal display panel 10 .

[0036]The transmissive color liquid crystal display panel 10 has a structure in which transparent substrates made of glass or the like (for example, a TFT substrate 11 and a counter substrate 12 ) face each other. In the gap between these substrates, for example, a liquid crystal layer 13 in which twisted nematic (TN) liquid crystal is sealed is provided. Signal lines 14 , scanning lines 15 , thin film transistors 16 and pixel electrodes 17 are formed on the TFT substrate 11 . The signal...

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Abstract

A backlight device is provided that realizes high luminance while widening the color range. The backlight device illuminates a transmissive color liquid crystal display panel with white light from a back side of the transmissive color liquid crystal display panel having a color filter made of a three-primary-color filter which selectively transmits light having wavelengths of red light, green light, and blue light. The backlight device includes a plurality of cold cathode fluorescent lamp tubes having tube walls coated with a wide-color-range fluorescent material. The backlight device also includes a diffusion plate which diffuses white light emitted from the cold cathode fluorescent lamp tubes, illuminates the color liquid crystal display panel with the diffused white light, and is positioned at a predetermined distance from the cold cathode fluorescent lamp tubes. A predetermined pattern is printed on the diffusion plate, by dot printing, corresponding to positions at which the cold cathode fluorescent lamp tubes are provided, and the diffusion plate is positioned several mm apart from the cold cathode fluorescent lamp tubes.

Description

technical field [0001] The present invention relates to a backlight device included in a liquid crystal display or the like to extend the color range of the liquid crystal display, and to a liquid crystal display including the backlight device. Background technique [0002] Compared with cathode ray tubes (CRTs), liquid crystal displays can be improved to have larger display screens, lighter weight, thinner depth, lower power consumption, and the like. Accordingly, liquid crystal displays and self-emissive plasma display panels (PDPs) have come into use in television receivers, various displays, and the like. In liquid crystal displays, liquid crystals are sealed between two transparent substrates, which can be of various sizes. A voltage applied to the substrate has altered the orientation of the liquid crystal molecules. In this way, the light transmittance changes, thereby optically displaying a predetermined image or the like. [0003] In a liquid crystal display, for...

Claims

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Application Information

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IPC IPC(8): G02F1/13357G02F1/1335H01J61/00G02B5/02G02B5/23
CPCG02F1/133604G02F1/133606G02F1/133504G02F1/133514B01F23/60B01F27/1163B01F27/808B01F35/32045
Inventor 奥贵司山崎芳则楠木常夫大野胜利五十岚崇裕
Owner SONY CORP
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