Device and method for display centering of the effective screen

Details Device and method for display centering of the effective screen Device and method for display centering of the effective screen

1996-01-29

1998-06-23

Brier, Jeffery

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

345 3, 345132, G09G 336

Patent

active

057710406

ABSTRACT:
A device and method for centering a display on the effective screen of a Liquid Crystal Display (LCD). A first pulse generator outputs horizontal timing pulses at a first frequency, and a second pulse generator outputs horizontal timing pulses at a second frequency. The first and second pulses are summed according to a data enable signal. A start pulse generator receives the summed pulses and the vertical synchronizing signal and controls the starting line of the display data according to the desired display position on the effective screen, the number of screen lines, and the number of data display lines. Because the device and method utilizes internal timing signals of the display, it is capable of use with any number of screen lines or vertical synchronizing frequency.

REFERENCES:
patent: 4990904 (1991-02-01), Zenda
patent: 5111190 (1992-05-01), Zenda

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