Projector

Details Projector Projector

2007-11-20

2007-11-20

Dowling, William C. (Department: 2851)

Optics: image projectors

Lamp control

C353S122000

Reexamination Certificate

active

11616995

ABSTRACT:
A projector includes a lamp, a ballast, a micro controller unit and an optical engine. The lamp emits a light ray. The ballast starts the lamp and selectively outputs an operating power and a blanking power to the lamp. The micro controller unit controls the ballast. The optical engine receives the light ray and outputs a projecting image to a screen outside the projector. When the projector enters a blanking mode from a normal operating mode, the micro controller unit outputs a control signal to the ballast, and the power supplied from the ballast to the lamp is changed from the operating power to the blanking power.

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