Title:
HIDランプを動作する電子回路及び画像プロジェクタ
Document Type and Number:
Japanese Patent JP4198408
Kind Code:
B2
Abstract:
The circuit has a lamp driver (110) for providing a regulated lamp current to operate the HID lamp (322) in response to a control signal and an intensity sensor (130) for producing and outputting a sensor signal representing the light output at the sensor position. A high pass filter (140) provides the control signal by filtering the sensor signal. Independent claims are also included for the following: an electrical circuit and an image projector with an HID lamp.
Inventors:
Peter Lürkens
Karsten Deppe
Holger Mainch
Karsten Deppe
Holger Mainch
Application Number:
JP2002219153A
Publication Date:
December 17, 2008
Filing Date:
July 29, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H05B37/03; G03B21/14; H05B41/231; H05B37/02; H05B41/392
Domestic Patent References:
| JP4277495A | ||||
| JP2000028988A |
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato