Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-12-12
2000-02-15
Liang, Regina
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345211, 315276, 310311, G09G 336
Patent
active
060258241
ABSTRACT:
A piezo electric transformer driving circuit and a cold cathode tube illuminating device comprising a series circuit including a switch circuit, a coil and a switching transistor and being connected successively in the named order between a power source line and a ground; a piezo electric transformer of which primary side electrode is connected to a juncture of the coil and the switching transistor; and a drive halting circuit which geneates a first control signal for turning OFF the switching circuit and further generates a second control signal for halting a switching operation of the switching transistor after a predetermined period from the generation of the first control signal, wherein the predetermined period is at least one turned ON interval of the switching transistor and through the switching operation of the switching transistor a high voltage is generated at a secondary side of the piezo electric transformer.
REFERENCES:
patent: 5078476 (1992-01-01), Shin
patent: 5726536 (1998-03-01), Hagiwara
patent: 5739679 (1998-04-01), Takehara
patent: 5818709 (1998-10-01), Takehara
patent: 5844540 (1998-12-01), Terasaki
patent: 5905491 (1999-05-01), Kim
patent: 5936598 (1999-08-01), Hayama et al.
Fujisawa Masanori
Horiuchi Sachito
Kawashima Shingo
Nakagawa Eiji
Liang Regina
NEC Corporation
Rohm & Co., Ltd.
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