Method for correcting color cast generated after long-time work of liquid crystal display television through gamma curves
A long-term technology for LCD TVs, applied in electrical components, color signal processing circuits, selective content distribution, etc., can solve the problems of LCD TV color shift, color coordinate reduction, and LCD TV color reproduction, and achieve natural effects Effects that are realistic, enhance brand image, and improve user experience
Active Publication Date: 2016-08-17
SICHUAN CHANGHONG ELECTRIC CO LTD
View PDF4 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[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 quickly; if you continue to work, the color coordinates of the LCD screen will still drop slowly and eventually stabilize. Assuming that the color coordinates of the LCD screen are standard for x and y color coordinates: 0.280 and 0.290, respectively, if the x and y color coordinates are both reduced by 0.01, the color temperature of the LCD screen will increase by about 2000K; if the x and y color coordinates are both reduced by 0.02, the LCD screen The color temperature will increase by more than 4000K. If the color coordinate of the LCD screen that works for a long time drops more, the image viewed by the user at home will have obvious color cast. For this reason, the working hours of the LCD screen are divided into three time periods: the initial stage, the mid-term change stage, and the later stable stage.
[0020] Initial stage: After the LCD screen work...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
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 the liquid crystal television after a long time operation by using gamma curve. Background technique [0002] As competition in the LCD TV market intensifies, LCD manufacturers in order to reduce costs, make LCD screens prone to lower color coordinates after working for a period of time, resulting in LCD TV color shift. This problem has also led to a decline in the color reproduction of LCD TVs, which makes the colors that users see at home and natural colors are far from each other, which causes customers to question the TV brand. This drop in the color coordinate of the LCD screen is irreversible, but the user experience is paramount and this problem must be solved. Summary of the invention [0003] The purpose of the present invention is to solve the above-mentioned deficiencies in the background technology and provide a m...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/73H04N21/485H04N21/81
CPCH04N9/73H04N21/4854H04N21/8166
Inventor 黎志强张承业
Owner SICHUAN CHANGHONG ELECTRIC CO LTD