Title:
LIGHTING DRIVING DEVICE, LIGHT SOURCE DEVICE, AND DISPLAY
Document Type and Number:
Japanese Patent JP2008034180
Kind Code:
A
Abstract:
To provide a protection function in the case an abnormality occurs in the operation when a lamp is lighting driven regularly due to contact failure of a line supplying a power to the lamp except for a non-load state.
When a drive operation for regular lighting after starting a lamp is carried out, voltage value of the output of a DC/DC down converter 21 in a lighting drive circuit is detected. If the voltage value detected is outside of a range corresponding to regular operation, and if the state that is outside of a range obtained corresponding to a non-load state continues for a certain time or more, the operation of the DC/DC down converter is stopped, and power source supply to the lamp is stopped.
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Inventors:
FUJITA KOICHI
Application Number:
JP2006204619A
Publication Date:
February 14, 2008
Filing Date:
July 27, 2006
Export Citation:
Assignee:
SONY CORP
International Classes:
H05B41/24; G03B21/14
Attorney, Agent or Firm:
Atsuo Waki
Nobuo Suzuki
Wachi Shigeaki
Nobuo Suzuki
Wachi Shigeaki