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Patent Searching and Data


Title:
POWER SUPPLY DEVICE, ELECTRONIC APPARATUS, DISCHARGE LAMP LIGHTING DEVICE, AND PROJECTOR
Document Type and Number:
Japanese Patent JP2009136100
Kind Code:
A
Abstract:

To notify the replacement time of an electrolytic capacitor through simple circuitry.

A power supply device 100 includes: a rectifying circuit 110 for rectifying an alternative current voltage AC supplied from outside to output a direct current voltage DC; an electrolytic capacitor 112 for retaining the direct current voltage DC; and a voltage monitoring section 114 which monitors the elapsed time from when the alternative current AC is turned off until when the voltage value of the direct current voltage DC reaches a prescribed voltage value, and which outputs a notification signal IS notifying the replacement time of an electrolytic capacitor 112 when the elapsed time becomes less than a prescribed limit time.


Inventors:
YANASE SHIGEHIRO
Application Number:
JP2007309998A
Publication Date:
June 18, 2009
Filing Date:
November 30, 2007
Export Citation:
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Assignee:
SEIKO EPSON CORP
International Classes:
H02M7/12; G03B21/14; H05B41/24
Attorney, Agent or Firm:
上柳 雅誉
須澤 修
宮坂 一彦