Method and apparatus for detecting remaining lamp lifetime

Details Method and apparatus for detecting remaining lamp lifetime Method and apparatus for detecting remaining lamp lifetime

2005-05-17

2005-05-17

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S292000

Reexamination Certificate

active

06894441

ABSTRACT:
A method for detecting the remaining lifetime of light source lamp. In the method of the present invention, a lamp voltage across two lamp electrodes of the light source lamp is measured. The measured voltage is then converted to a digital value. Next, the digital value is compared with a relational table to calculate the remaining lifetime of the lamp.

REFERENCES:
patent: 5668850 (1997-09-01), Abdel-Malek
patent: 6157143 (2000-12-01), Bigio et al.
patent: 6177768 (2001-01-01), Kamata et al.
patent: 20040027545 (2004-02-01), Yokoyama et al.

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