The Method of Using Gamma Curve to Correct the Color Shift of LCD TV After Working for a Long Time
An LCD TV, a long-term technology, applied in electrical components, color signal processing circuits, selective content distribution, etc., can solve the problems of LCD TV color shift, decreased color reproduction degree of LCD TV, decreased color coordinates, etc., and achieves natural effects. Realistic, improve user experience effect, enhance brand image effect
Active Publication Date: 2017-07-28
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology
[0002] With the increasingly fierce competition in the LCD TV market, in order to reduce costs, various LCD screen manufacturers make the LCD screen prone to the problem of lowering the color coordinates after working for a period of time, which leads to the color shift of LCD TVs.
This problem also leads to a decline in the color reproduction of LCD TVs, causing a huge gap between the colors users watch at home and the natural colors, causing customers to question the TV brand
The drop in color coordinates of the LCD screen is irreversible, but the user experience is paramount, and this problem must be resolved
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[0019] After the LCD TV has been working for a period of time, the x and y color coordinates of the LCD screen will drop rapidly; if you continue to work, the color coordinates of the LCD screen will still drop slowly and eventually stabilize. Assume that the color coordinate standard of the LCD screen is that the x and y color coordinates are respectively: 0.280 and 0.290. If the x and y color coordinates both decrease by 0.01, the color temperature of the LCD screen will increase by about 2000K; if the x and y color coordinates both decrease by 0.02, the LCD screen will The color temperature will be increased by more than 4000K. If the color coordinates of the LCD screen that has been working for a long time have dropped a lot, the images that users watch at home will have obvious color cast. For this reason, the working time of the LCD screen is divided into three time periods: the initial stage, the mid-term change stage, and the later stage of stability.
[0020] Initial...
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The invention discloses a method for correcting color cast generated after long-time work of a liquid crystal television through gamma curves, and relates to the field of liquid crystal display television display. The method comprises the following steps that after a liquid crystal screen is heated according to conventional requirements, gamma debugging is conducted to generate the first gamma curve; after the x color coordinate and the y color coordinate of the liquid crystal screen are each lowered by a threshold value, gamma debugging is conducted to generate the second gamma curve; after the x color coordinate and the y color coordinate of the liquid crystal screen trend to be stable, gamma debugging is conducted to generate the third gamma curve; the three gamma curves obtained through debugging are all combined into television software; when the liquid crystal display television generates the color cast problem, the gamma curves are automatically switched by the television software or manually switched by a user to correct color cast. According to the method, color cast is corrected by calling the built-in gamma curves on the basis that no cost is increased, so that the final displayed effect is more natural and realistic.
Description
technical field [0001] The invention relates to the display field of liquid crystal televisions, in particular to a method for correcting the color shift of liquid crystal televisions after working for a long time by using gamma curves. Background technique [0002] As the competition in the LCD TV market intensifies, in order to reduce costs, various LCD screen manufacturers make the LCD screen prone to the problem of lowering the color coordinates after working for a period of time, resulting in color shift of LCD TVs. This problem also leads to a decline in the color reproduction of LCD TVs, causing a huge gap between the colors that users watch at home and the natural colors, causing customers to question the TV brand. The drop in color coordinates of the LCD screen is irreversible, but the user experience is paramount, and this problem must be resolved. Contents of the invention [0003] The purpose of the present invention is to address the above-mentioned deficienc...
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IPC IPC(8): H04N9/73H04N21/485H04N21/81
CPCH04N9/73H04N21/4854H04N21/8166
Inventor 黎志强张承业
Owner SICHUAN CHANGHONG ELECTRIC CO LTD