Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-10-20
1997-05-06
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 79, 345 78, 345 77, 345211, 345212, 345209, 345 52, G09G 330
Patent
active
056275560
ABSTRACT:
A circuit for driving an AC TFEL device which is a complete solid luminescence element, capable of generating positive and negative AC voltages from a single DC voltage by utilizing a relative potential difference and thereby providing a compact voltage supply unit required for driving the AC TFEL device. A circuit is also provided which is constructed to reduce the number of operating voltages required in the refresh drive method and the scan inversion symmetric drive method upon driving the matrix of the AC TFEL device by using a relative potential generating circuit. By employing such a circuit, it is possible to simply provide a voltage supply circuit required in a portable display system using the AC TFEL device and supply a voltage required for the refresh driving and the scanning sequence inversion driving by using only one clock control signal.
REFERENCES:
patent: 5093654 (1992-03-01), Swift et al.
patent: 5206631 (1993-04-01), Yamamoto et al.
Kwon Yong-Moo
Oh Myung Hwan
Hjerpe Richard
Korea Institute of Science and Technology
Tran Vui T.
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