Invention Grant
- Patent Title: Lighting of discharge lamp by frequency control
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Application No.: US11712956Application Date: 2007-03-02
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Publication No.: US07692392B2Publication Date: 2010-04-06
- Inventor: Kesatoshi Takeuchi
- Applicant: Kesatoshi Takeuchi
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2004-266203 20040914
- Main IPC: G05F1/00
- IPC: G05F1/00
Abstract:
A discharge lamp controlling apparatus includes a detector for detecting a discharge condition of a discharge lamp; a frequency changing unit for gradually changing a frequency of a voltage to be applied to the discharge lamp until the discharge condition reaches a predetermined lighting condition; and a voltage controller for controlling the voltage to be applied to the discharge lamp on the basis of the frequency changed by the frequency changing unit.
Public/Granted literature
- US20070159214A1 Lighting of discharge lamp by frequency control Public/Granted day:2007-07-12
Information query
IPC分类:
