Method for setting a pixel clock of a display driving circuit

Details Method for setting a pixel clock of a display driving circuit Method for setting a pixel clock of a display driving circuit

2007-03-20

2007-03-20

Nguyen, Jimmy H. (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S212000, C345S213000, C348S537000

Reexamination Certificate

active

10708046

ABSTRACT:
A method for setting a pixel clock of a display driving circuit. The display driving circuit has a basic input/output system (BIOS) for controlling a clock generator to output the pixel clock. The method includes reading a predetermined pixel clock according to a display mode setting, utilizing a plurality of scaling factors to respectively adjust a reference clock for generating a plurality of calculation results, utilizing a plurality of coefficients R to respectively right-shift R bits of the calculation results for generating a plurality of quotients, comparing a plurality of differences between the quotients and the predetermined pixel clock for obtaining an optimum quotient, and controlling the clock generator to output an actual pixel clock according to the scaling factor and the coefficient R related to the optimum quotient.

REFERENCES:
patent: 6078317 (2000-06-01), Sawada
patent: 6633288 (2003-10-01), Agarwal et al.
patent: 2003/0011588 (2003-01-01), Kim

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