Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1998-06-30
2000-08-01
Wu, Xiao
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 75, 345 74, G09G 322
Patent
active
060973560
ABSTRACT:
Methods of improving the display uniformity of a thin CRT display are disclosed. These methods can provide nearly perfect display uniformity for a thin CRT display despite the fact that the emission characteristics of those cathodes in the thin CRT display are intrinsically non-uniform due to the inevitable manufacture variations. In order to improve the display uniformity of a thin CRT display, the emission characteristics of all cathodes are measured, and calibration parameters for each cathode are obtained from the measured emission characteristics of the corresponding cathode. The calibration parameters of each cathode are stored in a calibration memory (70) as a complete look-up table or a partial look-up table. With a complete look-up table, when the CPU want to display a pixel with a desired luminosity, it will use the complete look-up table of the corresponding cathode to find the correct driving parameters. With a partial look-up table, when the CPU want to display a pixel with a desired luminosity, it will use the partial look-up table of the corresponding cathode in combination with additional calculation to find the correct driving parameters, and these calculations can be performed with the main CUP or a dedicated display processor (60).
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