Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2006-10-24
2006-10-24
Tran, Henry N. (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S208000, C345S211000, C315S169100, C348S671000
Reexamination Certificate
active
07126617
ABSTRACT:
The method of driving a display apparatus, in which the gradation scale is represented, by the subfield method, with less flicker even when driven at a frequency of 50 Hz has been disclosed. In this method, the two most weighted subfields (subfields of Bn brightness and Bn−1 brightness when it is assumed that the frame is composed of n subfields and the brightness of n subfields is Bi (i=1−n; B1≦B2. . . Bn−1≦Bn)) are arranged at the interval of about half the length of the frame. Because of this, there exist two peaks of the light emission intensity in a frame, the interval being about half the length of the frame, and if the display apparatus is driven at a frequency of 50 Hz and the length of the frame is 20 ms, the variation period of the light emission intensity is 10 ms and the light emission intensity varies at 100 Hz, therefore, flicker is not detected.
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Kojima Ayahito
Kuriyama Hirohito
Toda Kosaku
Yamamoto Akira
Fujitsu Hitachi Plasma Display Limited
Staas & Halsey , LLP
Tran Henry N.
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