Display controller for reducing flicker of a cursor using gradia

Details Display controller for reducing flicker of a cursor using gradia Display controller for reducing flicker of a cursor using gradia

1998-08-27

2000-09-12

Powell, Mark R.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345118, 345157, 345162, G09G 508, G09G 336, G02F 1133

Patent

active

061184306

ABSTRACT:
A cursor is displayed clearly without glimmering, in the display control device and the display apparatus which suppress the dissipation currents used in the data transfer to a much lower level, by reducing the quantity of data transfer between the image memory and the display means. The controller 15 calculates a cursor range that is subject to a process of a cursor display. Then, the controller 15 determines a divided area from which the gradation information is to be read, based on the cursor range calculated, and the data of the cache memory 15a indicating the divided area into which the information of intermediate gradation is stored in the image data storage unit 3a. And then, the controller 15 reads the gradation information from the divided area, and writes the data into the built-in memory 2a, based on the cursor range, the gradation information, and the current frame number. The driver 2 turns the correspondence each of the display dots to either the ON state or the OFF state, based on the data of the built-in memory 2a.

REFERENCES:
patent: 6028587 (2000-02-01), Igari

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