Method and system for correcting gamma curve of display based on color temperature
A curve correction and display technology, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve problems such as gray-scale display consistency and LCD TV color errors affecting LCD TVs, improve display quality, reduce The effect of small color errors
Active Publication Date: 2016-02-17
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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Problems solved by technology
[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a display gamma curve correction method and system based on color temperature, aiming to solve the problem of color errors in the gray scale of LCD TVs under different color temperature modes in the prior art, which affects the performance of LCD TVs. Gray scale shows consistency flaws
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[0043] In order to make the objectives, technical solutions and effects of the present invention clearer and clearer, the present invention will be described in further detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0044] A schematic diagram of the internal processing of inputting digital signals to display in the prior art, such as figure 1 As shown, before the image input screen is displayed, the image can be regarded as a digital signal. The digital signal is processed through the system-on-chip SOC. The SOC processing process includes converting the red, green, and blue components of the image color from R (red), G (green), and B (blue) components to Y, U, and V components, and correcting the Y, U, and V components. After that, it is converted into the form of R, G, and B components for gamma correction. Send the gamma-corrected image data to ...
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The invention discloses a method and a system for correcting a gamma curve of a display based on color temperature. The method comprises the following steps: setting a corresponding color coordinate value under different color temperature modes in advance and storing; sending testing signals at different gray levels to the display, thereby acquiring the optical data of the testing signals; judging if the optical data of the testing signals is identical to the preset color coordinate value; if so, storing the current gamma data curve; if no, adjusting and correcting R, G and B values of the gamma curve till the measured value is identical to the preset color coordinate value, and then storing the gamma data curve after being adjusted. According to the method provided by the invention, the gamma curve can be specifically corrected according to different color temperature modes, the color temperature is corrected on the basis of luminance correcting, the color error between gray levels under different color temperature modes is reduced and the display quality of the display is increased.
Description
technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a method and system for calibrating a gamma curve of a display based on color temperature. Background technique [0002] Since the color temperature has a great influence on the subjective image quality such as color rendering and scene transparency, in addition to the standard color temperature, some specific viewing factors such as cold and warm color temperature will be added in addition to the standard color temperature of TVs and monitors when they leave the factory. Mode for user to choose. [0003] Usually, the processing method for different modes of color temperature is to process YCbCr or R'G'B' (normalized RGB data) through a 3 × 3 matrix multiplier, and then use R-Gain, G-Gain, B-Gain to adjustment, see appendix figure 1 The signal processing block diagram shown. However, because the RGB three-color photoelectric characteristics of many LCD s...
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Inventor 全晓荣洪文生刘翔章
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD