Method and device for adjusting the phase for flat screens

Details Method and device for adjusting the phase for flat screens Method and device for adjusting the phase for flat screens

2006-12-19

2006-12-19

Hjerpe, Richard (Department: 2677)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S211000, C345S212000

Reexamination Certificate

active

07151537

ABSTRACT:
A method and a device for correcting the phase between the pixel clock of a graphics card and the sampling clock of a flat-panel display with an analog interface in a system including a flat-panel display, graphics card, and computer. Automatic adjustment of the phase is performed repeatedly. In the process, the rising edge of a video pulse of a sufficiently bright image spot in the first image column close to the back-porch region is determined. The falling edge of a video pulse is determined at a sufficiently bright image spot in the last image column close to the front-porch region, and the phase is adjusted such that the sampling instant is situated approximately at the midpoint between the rising and falling edges of a video pulse.

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