Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1997-03-27
2000-06-06
Brier, Jeffery
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
345 76, G09G 330
Patent
active
060724773
ABSTRACT:
The present EL display includes a step-up circuit for increasing a voltage of a DC power supply in response to a pulse signal output by an oscillator, a switching circuit connected with the step-up circuit and including first through fourth MOSFETs and an inverter, an EL element connected with an output terminal of the switching circuit, and a voltage detector for outputting a control signal in response to an output signal from the switching circuit for instructing a switching operation of the switching circuit. The step-up circuit includes a series circuit of a coil and a diode serially connected with each other and a step-up transistor connected with a node in the series circuit at its main electrode for receiving the pulse signal at its control electrode.
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patent: 5677599 (1997-10-01), Wood
Brier Jeffery
Matsushita Electric - Industrial Co., Ltd.
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