Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-02-06
2007-02-06
Liang, Regina (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S063000
Reexamination Certificate
active
10744955
ABSTRACT:
The invention relates to a method for optimizing brightness in a display device having a plurality of luminous elements corresponding to the pixels of a picture, wherein the time duration of a video frame or video field is divided into a plurality of sub fields during which the luminous elements can be activated for light emission with sustain pulses corresponding to a sub field code word which is used for brightness control, the total number of sustain pulses being determined in view of a selected power mode function of picture load the method including the following steps:setting a threshold value in relation to the picture load,comparing, for a frame, the number of the current sustain pulse to said threshold value,if the number of the current sustain pulses is below the threshold value, the sustain pulses are generated at a fixed frequency,if the number of the current sustain pulses is above the threshold value, the sustain pulses are generated at an evolving frequency.This invention applies mainly to PDP and all displays controlled by using a PWM.
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Correa Carlos
Thebault Cédric
Weitbruch Sébastien
Fried Harvey D.
Laks Joseph J.
Thomson Licensing
Verlangieri Patricia A.
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