Compensation device for non-uniform regions in flat panel display and method thereof

Abstract

Disclosed is a digital signal processing architecture for a flat panel display having non-uniform regions, which is not by means of materials, optical films or fabrication processes. Therefore, the manufacturing cost and complexity of the flat panel display are not negatively affected. In the digital signal processing architecture, a test is performed on the panel for identifying all pixel locations in non-uniform regions and non-uniform types. Then, input video signals are compared with data about the relative non-uniform regions for determining whether the video signal falls in a normal-region pixel or a non-uniform region pixel. Then the non-uniform compensation on the video signal falling in the non-uniform region pixel is based on the non-uniform type, so that the video signals displayed on the panel are not negatively affected.

What is claimed is: 
     
       1. A compensation method for non-uniform regions, used in a flat panel display for eliminating the negative impact of the non-uniform regions in a the flat panel on display of a video signal, the compensation method comprising:
 according to a test result of the panel, determining whether the video signal falls in a normal-region pixel or a non-uniform region pixel, wherein the test result of the panel comprises a location information of non-uniform regions; 
 when the video signal is determined to be falling in the non-uniform region pixel, compensating the video signal through digital processing; and 
 using a limiting processor to limit the size of the video signal. 
 
     
     
       2. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising using a data processor to process the location information of non-uniform regions. 
     
     
       3. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising using an input line buffer to receive the video signal. 
     
     
       4. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising using an output line buffer to output the video signal. 
     
     
       5. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising using a database to store the location information of non-uniform regions. 
     
     
       6. The compensation method for non-uniform regions as claimed in  claim 5 , wherein the database is a DRAM. 
     
     
       7. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising storing a variation amount information of the panel. 
     
     
       8. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising using a gray scale fader for performing a gray scale fading operation to compensate the video signal. 
     
     
       9. The compensation method for non-uniform regions as claimed in  claim 1 , wherein the compensation step comprises performing a mathematical operation to compensate the video signal. 
     
     
       10. The compensation method for non-uniform regions as claimed in  claim 1 , wherein the compensation step comprises performing a logic operation to compensate the video signal. 
     
     
       11. The compensation method for non-uniform regions as claimed in  claim 1 , wherein the compensation step comprises performing a direct mapping operation to compensate the video signal. 
     
     
       12. The compensation method for non-uniform regions as claimed in  claim 1 , further comprising compensating the video signal through digital processing, and inputting the video signal to an LED power supply driver to control an LED plate of backlight module. 
     
     
       13. The compensation method for non-uniform regions as claimed in  claim 1 , wherein the panel is an LCD panel. 
     
     
       14. The compensation method for non-uniform regions as claimed in  claim 1 , wherein the panel is an LED plate of backlight module. 
     
     
       15. A compensation method for compensating a video signal of a display panel, the compensation method comprising:
 obtaining the video signal falling in one of one or more non-uniform region of the display panel according to stored location information of respective locations of non-uniform regions;   obtaining type information associated with the one or more non-uniform regions according to stored type information of respective types of the non-uniform regions; and   compensating the obtained video signal through digital processing according to the corresponding type of the non-uniform region, wherein only the one or more non-uniform regions are compensated.   
     
     
       16. The compensation method according to claim 15, wherein the step of compensating the video signal through digital processing includes using a look-up table to adjust gray scales/colors of the video signal according to the location information. 
     
     
       17. The compensation method according to claim 16, wherein the step of using the look-up table includes mapping the gray scales/colors of the video signal to the adjusted gray scales/colors the video signal. 
     
     
       18. A compensation method for compensating a video signal of a display panel, the compensation method comprising:
 receiving the video signal, wherein the video signal includes location information of pixel and information of gray scales/colors of the video signal;   referring to a look up table which maps the gray scales/colors of the video signal to adjusted gray scales/colors of the video signal; and   compensating the video signal falling in any of the non-uniform regions through digital processing by using the look-up table to convert the gray scales/colors of the video signal to be the adjusted gray scales/colors of the video signal according to the location information of pixel, wherein only the one or more non-uniform regions are compensated.   
     
     
       19. The compensation method according to claim 18, wherein the compensating manner depends on a type of the non-uniform region. 
     
     
       20. The compensation method according to claim 18, further comprising:
 receiving location information about respective locations of the non-uniform regions; and   determining whether the video signal falls in any one of the non-uniform regions according to the location information of pixel and the location information of respective locations of the non-uniform regions.