Apparatus for performing a full-color emulation on the TFT displ

Details Apparatus for performing a full-color emulation on the TFT displ Apparatus for performing a full-color emulation on the TFT displ

1995-07-10

1998-01-27

Wu, Xiao

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 89, 345147, 345149, 345150, G09G 336

Patent

active

057126518

ABSTRACT:
When a full-color display is to be performed, the upper 4-bit data of each of R, G, and B video data each having an 8-bit width is used as video data of a TFT type LCD in which a full-color display is to be performed, and the lower 4-bit data is supplied to a frame rate controller (36) arranged to control an STN type LCD. For this reason, 16 gray scale levels expressed by the upper 4-bit data are combined to 16 gray scale levels expressed by the frame rate controller (36), and each of R, G, and B video data can be emulatively expressed on the 16-gray-scale TFT type LCD in 256 gray scale levels. When the frame rate controller (36) is used for a full-color emulation, the full-color display can be realized without increasing the number of circuits.

REFERENCES:
patent: 4760387 (1988-07-01), Ishii et al.
patent: 4779083 (1988-10-01), Ishii et al.
patent: 4998100 (1991-03-01), Ishii
patent: 5122783 (1992-06-01), Bassetti, Jr.

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