Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2005-10-12
2010-06-15
Awad, Amr (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S082000
Reexamination Certificate
active
07738002
ABSTRACT:
The present invention provides an extension to a standard N-bit digital pulse width control method which can discriminate 2Ndiscrete pulse widths per pulse cycle. The present invention provides a method and apparatus that can modulate the pulse widths over a period of 2Mpulse cycles in which each pulse cycle can have its own pulse width or respective duty cycle. The resulting time averaged or effective pulse width therefore can be controlled with a resolution of 2N+Mstates rather than a resolution of 2Nstates as is common with standard methods.
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Ashdown Ian
Robinson Shane P.
Awad Amr
Koninklijke Philips Electronics , N.V.
Sherman Stephen G
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