Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1999-03-02
2000-12-05
Vu, David
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315309, 315291, 315224, G05F 100
Patent
active
061571431
ABSTRACT:
A back-light assembly for a liquid crystal display (LCD) includes an LCD display screen and at least one cold cathode fluorescent lamp positioned for illuminating a back-side of the display screen. A reflector positioned adjacent the lamp reflects light toward the display screen. A light diffuser is positioned between the lamp and the display screen; and a power controller regulates current supplied to the lamp from an external power source so as to establish a predetermined luminance level at the display screen. A light level sensor provides a signal representative of the luminance output of the lamp to the controller so as to regulate lamp current to maintain the predetermined luminance level.
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Bigio Laurence
Stevanovic Ljubisa Dragoljub
Breedlove Jill M.
General Electric Company
Stoner Douglas E.
Vo Tuyet T.
Vu David
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