G - Physics – 09 – G
Patent
G - Physics
09
G
G09G 5/04 (2006.01) G06F 3/147 (2006.01) G09G 3/36 (2006.01)
Patent
CA 2048702
According to this invention, a panel controller converts display data having 64 gray scale levels for a color CRT output from an RAMDAC into display data having 57 gray scale levels to perform display driving of a color LCD. The panel display controller has a function of generating 7 intermediate pseudo gray scales between the base frames of R, G, and B signals by a frame rate control method in the color LCD having 8 base gray scale levels of each of the R, G, and B signals to generate (180 K colors) display data having 57 gray scale levels and a function of generating 3 intermediate pseudo gray scales between the base gray scales of the signals by a dither method to generate (24K colors) display data hav- ing 39 gray scale levels. The selection of the frame rate control or the dither method and the selection of the 512-color, 180-K-color, or 24-K-color display are arbitrarily performed, or these selection operations are automatically performed in accordance with a display mode.
Shimamoto Hajime
Uchikoga Hiroshi
Zenda Hiroki
Kabushiki Kaisha Toshiba
Marks & Clerk
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