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RGBW-type four-primary-color display gray scale combination conversion method

A conversion method and display technology, applied to static indicators, cathode ray tube indicators, instruments, etc., can solve the problem of not strictly calculating color attributes such as hue, saturation, and brightness, and not making full use of the 4-primary color display color gamut space, etc. problem, to achieve the effect of convenient color gamut matching

Active Publication Date: 2015-07-29
HISENSE VISUAL TECH CO LTD +1
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Problems solved by technology

[0005] However, these methods do not strictly calculate the color attributes such as hue, saturation, and brightness of each color, nor do they take full advantage of the color gamut space of the 4-primary color display from the perspective of the overall color gamut of the display

Method used

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  • RGBW-type four-primary-color display gray scale combination conversion method
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  • RGBW-type four-primary-color display gray scale combination conversion method

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Embodiment

[0087] Step 1: Calculate RGB to RGBW primary color gain coefficient:

[0088] Such as figure 1 As shown, since the RGBW technology introduces more white (W) sub-pixels on the original LCD panel, which changes the original panel structure and the color attributes of each primary color, when performing color gamut matching, RGBW technology should first be introduced before and after the primary color changes magnitude is calculated. The text in the figure indicates the corresponding color in this area.

[0089] figure 1 Respectively represent the arrangement of a single pixel of the existing display, figure 1 On the left is the arrangement of individual pixels of the original RGB display in the prior art. The red, green and blue rectangles correspond to the sub-pixels of the RGB channel respectively. There is a black area in the lower left corner of each color sub-channel, and the color-giving area is TFT driver that cannot transmit light. . figure 1 The right side is the R...

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Abstract

The invention discloses a method for RGBW-type four-primary-color display gray scale combination conversion. The method comprises the steps: based on the color gamut matching principle, through the rational colorimetry model, calculating the color gamut of the original RGB three-primary-color display in the L*a*b space as the source color gamut, and using the color gamut of the RGBW four-primary-color display in the L*a*b space as the target color gamut; and mapping the source color gamut to the target color gamut one to one by using the rational color gamut matching algorithm, and then performing the color gamut space conversion, and finally realizing the matching conversion from RGB to RGBW gray scale combination. Compared with the traditional RGBW conversion algorithm, the scheme is capable of strictly calculating tristimulus values of each gray scale combination and converting to the L*a*b space, using the color reappearance ability of RGBW in the greatest degree through the color gamut matching, guaranteeing that the hue angle is not changed before and after the conversion in the conversion processes, and reducing the color distortion.

Description

technical field [0001] The invention relates to the field of display design, in particular to a gray scale combination conversion method for an RGBW type four-primary color display. Background technique [0002] LCD (Liquid Crystal Display) has been widely used in mobile devices, such as mobile phones, notebook computers and so on. However, due to the passive display principle of the liquid crystal panel, in order to achieve full color, three color filters of red (R), green (G), and blue (B) are used as primary color mixing. In addition to the use of polarizing film, according to statistics, only 5% to 10% of the backlight energy can be perceived by the observer, and the rest is absorbed by the liquid crystal module and wasted. In order to improve the light efficiency of the liquid crystal display, the RGBW four-primary color technology is proposed. The core of this technology is to add a white (W) sub-pixel to the original sub-pixel arrangement. Since the white (W) sub-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G5/02H04N9/64
Inventor 曹建伟王坚李晓华董玉珍杨嘉
Owner HISENSE VISUAL TECH CO LTD
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