Display controller for a flat display apparatus
AssigneesHitachi, Ltd., Hitachi Video & Information System, Inc.
InventorsKiyokazu Nishioka, Masahiro Jinushi, Nobuo Tsuchiya
Life of this patent
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Abstract
A display controller of a flat display apparatus which performs multiple color display and variable color display for display data read out of a lookup table. The lookup table comprises a parallel lookup table which has n (n.ltoreq.2) registers for storing color information and m selectors which receive n pieces of color information independently from the n registers, each select one of n pieces of color information, and deliver m pieces of color information simultaneously. The controller further comprises a data selector which selectively delivers the output of another register to in the parallel lookup table in place of the register to which the read access has been made.
Claims11
A display controller for a flat display apparatus comprising:
- a display address generation circuit which generates display addresses sequentially;
- a display memory which stores pixel display data and reads out said pixel display data in response to a display address provided by said display address generation circuit;
- a parallel lookup table which converts pixel display data read out of said display memory into color designating data for a respective pixels with a data format to be output to a display device;
- and
- a flat display device which displays an image made up of a plurality of pixels from the data provided by said parallel lookup table;
- wherein said parallel lookup table comprises:
- a plurality of lookup table devices including n memory devices (where n is an integer greater than one) each for storing color pixel designating information;
- and
- m selectors (where m is an integer greater than one), each connected to said n memory devices independently, for receiving n pieces of color pixel designating information stored in said n memory devices and for outputting m pieces of color pixel designating information for m pixels simultaneously by each selector selecting one from said n pieces of color pixel designating information according to said pixel display data read out of said display memory,
- wherein said m pieces of color pixel information corresponds to display data to be displayed on said flat display apparatus of an adjacent m pixels.
Dependencies are inferred from the claim text.