Method for regulating gamma comparison table through gamma curve and color temperature curve

Abstract

The invention relates to a method for adjusting a gamma comparison table through a gamma curve and a color temperature curve, the method comprises the following steps: setting a target color temperature value and a target color coordinate value for a gray scale point on a liquid crystal display, measuring the current color temperature and the current coordinates value of the gray scale point, if any error respectively between the current color temperature value, the current color coordinates value, the together-displayed current lightness and the target color temperature value, the target color coordinates value and the together-displayed target brightness is not less than the minimum error, adjusting the transforming relationship between the voltage and the gray scale of various color light in the gamma comparison table to correct the current color temperature value, if the error between the current color temperature value, the current color coordinates value, the together-displayed current brightness and the target color temperature value, the target coordinates value and the together-displayed target brightness are all smaller than the minimum error, completing the adjustment of the gray scale point.

Description

technical field [0001] The present invention relates to a method for adjusting a gamma comparison table, in particular to a method for adjusting the gamma comparison table through a gamma curve and a color temperature curve. Background technique [0002] At present, the science and technology industry is developing vigorously, especially the optoelectronic technology industry is progressing faster and faster, and the market has higher and higher requirements for the size and quality of various optoelectronic display products. In order to improve the quality of optoelectronic display products, it is usually necessary to carry out After the monitor is adjusted and then launched, the quality of the displayed image should be perfect. [0003] In terms of liquid crystal displays, generally speaking, in order to make the characteristics of liquid crystal molecules match human vision, a gamma curve with a gamma value equal to 2.2 is usually used for adjustment. The reason is that h...

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Problems solved by technology

[0003] In terms of liquid crystal displays, generally speaking, in order to make the characteristics of liquid crystal molecules match human vision, a gamma curve with a gamma value equal to 2.2 is usually used for adjustment. The reason is that human vision is not linear in perception of light. Yes, so for the image data to be displayed, it must be converted into a voltage through a gamma curve with a gamma value equal to 2.2, so as to present a natural image in line with human visual experience. In addition, in the practice of circuit design, the gamma curve is usually Take multiple reference points on the curve to make a gamma comparison table, and the pixel data of the image can be quickly converted into voltage through this comparison table, and then applied to the liquid crystal molecules to display the image. However, although the above-mentioned gamma curve can be adjusted, Other factors affecting display quality have not been considered in the known technology. For example, color temperature is also an important factor affecting display quality. Therefore, the display quality of the known technology has been unable to break through.

[0004] Because in the automatic adjustment of the color temperature of the LCD panel, usually only the gamma curve is considered, that is, the brightness factor, it is usually assumed that the color temperature changes linearly, that is, the color temperature of the brightest level is found, and then According to the calculation of the gamma curve, find the closest red, green, and blue gamma comparison table, but due to the nonlinear characteristics of the liquid crystal display panel, this algorithm usually leads to color shift in dark steps Phenomenon, can only be manually corrected slowly, not only time-consuming, but also difficult to reuse the corrected results

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