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Color conversion method and circuit

A color conversion and circuit technology, applied in the field of color conversion methods and circuits, can solve problems such as brightness increase, and achieve the effect of increasing brightness and small color cast

Active Publication Date: 2008-01-09
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in satisfactory color saturation, but a small increase in brightness

Method used

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  • Color conversion method and circuit

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Embodiment Construction

[0030] Before describing the embodiments of the present invention, the problems encountered in the traditional RGBW display technology need to be briefly explained.

[0031] If we simply compare the brightness of the sub-pixel with full brightness: in the RGB panel, each pixel has three sub-pixels, and each sub-pixel will lose 2 / 3 when passing through the color filter of brightness. Therefore, the calculation of the total brightness is: 3*(1 / 3)*(1 / 3)=33% Among them, there are 3 sub-pixels, each sub-pixel occupies 1 / 3 of the area of ​​the panel, and each sub-pixel passes through a color filter to output The original brightness remains (1 / 3).

[0032] There are four sub-pixels in the RGBW panel, and the white sub-pixel (White sub-pixel) does not pass through the color filter, and will not lose brightness due to the color filter. Other sub-pixels will lose 2 / 3 of the brightness through the color filter.

[0033] Therefore, the calculation of the total brightness is: 3*(1 / 4)*(1...

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PUM

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Abstract

The invention relates to a color changing method which comprises the following steps: The brightness maximum value of a red color R, a green color G and a blue color B adds a first correcting value as a new maximum value. The brightness minimum values of R, G and B minuses a second correcting value as a new minimum value. The brightness middle value of R, G and B minuses adds a third correcting value as a new middle value. It sets a W value as the brightness minimum value of R, G and Bit uses a new maximum value, a new minimum value and a new middle value to displace the maximum value, new minimum value and the new middle of R, G and B to obtain corrected R, G and B. It uses the corrected R, G and B and the W value as an output red brightness value, an output green brightness value, an output blue brightness value and an output white brightness value.

Description

technical field [0001] The invention relates to a color conversion method and a circuit, in particular to a color conversion method and a circuit applied to a liquid crystal display. Background technique [0002] The pixel configuration of a traditional LCD panel is to form various colors by mixing the three primary colors of R (red), G (green), and B (blue). FIG. 1 shows an example of changing a pixel from three colors to four colors. In order to increase the brightness without affecting the resolution, the original three-color mode is changed to four-color. The color increases the part of W, that is, the sub-pixel (sub-pixel) with higher transmittance, which improves the brightness of the overall liquid crystal panel. This color mixing method is called a multi-primary color mixing system. Its advantage is that it solves the problem that the luminous intensity of the entire LCD panel decreases due to excessive absorption of backlight caused by the color-filter of the LCD ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G5/02H04N9/64H04N11/00G02F1/133
Inventor 苏玮柏贝志骏吴仰恩洪国永黄郁惠
Owner AU OPTRONICS CORP