Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-08-08
2006-08-08
Shankar, Vijay (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S076000
Reexamination Certificate
active
07088319
ABSTRACT:
Light-emitting elements disposed on a light-emitting display panel are driven by constant currents, and the forward direction voltages of the light-emitting elements are obtained by a sampling/holding circuit. Then, the voltage output from a drive voltage source composed of a DC-DC converter is controlled by the forward direction voltages obtained by the sampling/holding circuit. For example, when the light-emitting display panel starts to be driven for light emission or when the light emission luminance of the light-emitting display panel that is being driven for light emission is to be increased, a control signal is sent from a light emission control circuit to a voltage forcibly changing circuit which supplies an output voltage increase command to the PWM circuit of the drive voltage source. With this arrangement, the rising-up property of the light-emitting display panel and the following property of luminance can be improved.
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Patent Abstracts of Japan Publication No. 09-232074 dated Sep. 5, 1997 Discussed in the specification.
Murakata Masaki
Yoshida Takayoshi
Shankar Vijay
Tohoku Pioneer Corporation
Westerman, Hattori, Daniels & Adrian , LLP.
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