Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1998-11-25
2000-02-08
Vu, David H.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
3151693, 315315, 315320, 345102, 345204, 345214, G05F 100
Patent
active
060231319
ABSTRACT:
A backlight device for a color liquid crystal display includes a high-voltage generating means including a d.c. power source, an inverter and a switch interposed between the d.c. power source and the inverter to control the output supplied from the high-voltage generating means. Connected to the high-voltage generating means are three cold cathode-ray tubes in parallel for generating three colors, red, green and blue, and connected in series to respective cold cathode-ray tubes are switching means which may be bi-directional thyristors which are readily available, inexpensive, resistant to high voltages and permit a current to flow in both directions. By controlling both the output of the inverter and ON/OFF actions of the switching means in combination, the lighting of cold cathode-ray tubes can be controlled by using a single inverter
REFERENCES:
patent: 5304897 (1994-04-01), Sano et al.
patent: 5337068 (1994-08-01), Stewart et al.
patent: 5406299 (1995-04-01), Post
patent: 5886475 (1999-03-01), Horiuchi et al.
Philogene Haissa
Vu David H.
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