Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load
Reexamination Certificate
2007-08-28
2007-08-28
Tran, Thuy V. (Department: 2821)
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Discharge device load
C315S056000, C315S291000
Reexamination Certificate
active
10967743
ABSTRACT:
An incandescent lamp includes a lamp voltage conversion circuit within the lamp and connected to a lamp terminal, where the voltage conversion circuit converts a first line voltage at the lamp terminal to a second RMS load voltage usable by a light emitting element of the lamp. The voltage conversion circuit includes a triac phase-controlled dimming circuit, which in turn includes a hysteresis control network. The voltage conversion circuit may be an integrated circuit that is in the lamp base and connected between the lamp terminal and the light emitting element. The triac phase-controlled dimming circuit may be built for a specific line voltage.
REFERENCES:
patent: 3763395 (1973-10-01), Shilling et al.
patent: 3869631 (1975-03-01), Anderson et al.
patent: 4876495 (1989-10-01), Palanisamy et al.
patent: 6147457 (2000-11-01), Lohn et al.
patent: 6208090 (2001-03-01), Skilskyj et al.
patent: 6445133 (2002-09-01), Lin et al.
patent: 2003/0127994 (2003-07-01), Patchornik et al.
Ballenger Matthew B.
Kendrick George B.
Bessone Carlo S.
Duong Dieu Hien T
Osram Sylvania Inc.
Tran Thuy V.
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