Light output device and image forming apparatus including...

Details Light output device and image forming apparatus including... Light output device and image forming apparatus including...

2009-03-17

2011-11-22

Tran, Anh (Department: 2819)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S2090SC, C315S307000

Reexamination Certificate

active

08063584

ABSTRACT:
A light output device includes a feedback-signal generating unit configured to generate a feedback control signal for maintaining output power of the light at a predetermined value. The feedback-signal generating unit generates the feedback control signal in a gradually rising manner and supplies the generated feedback control signal to the output unit so that output power of the light is gradually increased at a time of power-on. The light output device also includes a discharge circuit configured to discharge a charge stored in the feedback-signal generating unit and thereby accelerate decrease of the feedback control signal and a power-voltage monitoring circuit configured to monitor a voltage of the power supplied to the output unit. The power-voltage monitoring circuit, upon detecting shutdown of the power, controls the discharge circuit and thereby causes discharge of the charge stored in the feedback-signal generating unit.

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Notification of Reasons for Refusal for Japanese patent application No. 2008-072662 mailed Feb. 10, 2011.

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