High colour expression liquid crystal display

A liquid crystal display and color technology, applied in instruments, nonlinear optics, optics, etc., can solve problems such as color coordinate shift, affecting LCD white point coordinates and color temperature, and being easily perceived by the human eye.

Inactive Publication Date: 2006-11-15
AU OPTRONICS CORP
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AI Technical Summary

Problems solved by technology

[0003] Generally speaking, we can use a variety of light-emitting elements as the backlight. However, the point light source characteristics of the current non-fluorescent tubes make it possible to use traditional cathode fluorescent lamps (Cathode Fluorescent Lamp, CFL), such as: cold cathode fluorescent tubes (Cold When the color filter of Cathode Fluorescent Lamp (CCFL)) is matched with a non-CFL light source, the color coordinates of red, green, and blue (RGB) will be shifted, which will affect the white point coordinates and color temperature of the LCD. Will affect the color gamut
like figure 2 As shown, once the LCD backlight is changed from a CFL backlight to a non-CFL backlight, the blue color coordinates will shift in the direction of poorer color purity, thus affecting the color gamut and being easily perceived by the human eye.

Method used

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  • High colour expression liquid crystal display

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Embodiment Construction

[0014] According to the requirements of the human eye for color performance, the International Organization for Standardization has defined several color specifications, and the present invention takes the standard specification of TCO'03 (the environmental label of the Swedish Federation of Professional Employees) as an example, but other standard specifications can also be used. Such as: NTSC, PAL, or other international standards, and the color coordinates of the red, green, and blue colors of these standards must roughly meet the requirements of Table 1, and it is also applicable. According to the red, green and blue color coordinate values ​​(u', v') formulated by TCO'03, the conversion relationship with the coordinate value (x, y) of the CIE 1931 color coordinate diagram (chromaticity diagram) is:

[0015] u'=4x / (-2x+12y+3)

[0016] v'=9y / (-2x+12y+3)

[0017] The liquid crystal display of the present invention includes a liquid crystal display panel with a plurality of ...

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Abstract

The present invention relates to a liquid crystal display. It possesses several color filters of red, green and blue three pixels and a backlight source. When suppose maximum luminance value of backlight source spectrum is about 1.0, the sum of products of luminance of backlight source spectrum and transmissivity of color filter of blue pixel about less than or equal to 2.0 in wavelength range of 490 nano to 540 nano, so that it can make the transmissivity spectrum of color filter and spectrum of backlight source be coordinated so as to obtain maximum representative colour gamut and can meet correspondent colour coordinate.

Description

technical field [0001] The present invention relates to a liquid crystal display with high color performance (high gamut), in particular to a liquid crystal display that can use a backlight source other than a fluorescent tube to meet the requirements of human eyes for color performance. Background technique [0002] Thin film transistor-liquid crystal display module (thin film transistor-liquid crystal display module, TFT-LCD module) has been widely used in various displays, such as figure 1 Shown is a schematic cross-sectional view of a TFT-LCD module. However, due to the influence of the color filter of the TFT-LCD module and the optical characteristics of the liquid crystal, the color performance presented by the TFT-LCD module is less saturated, so the high color reproduction (color reproduction) in the TFT-LCD module ) becomes one of the important characteristic parameters. Therefore, various international standard organizations formulate a variety of color specifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
Inventor 郑胜文隋寿龄
Owner AU OPTRONICS CORP
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