Title:
Light equipment and a projector
Document Type and Number:
Japanese Patent JP6155703
Kind Code:
B2
Abstract:
A light source device includes a plurality of light emitting devices connected in series, an open-circuit failure detecting section, a failure detection and maintenance section, and a short-circuiting section connected in parallel to at least one light emitting device among the plurality of light emitting devices. The open-circuit failure detecting section detects an open-circuit failure of the light emitting device connected in parallel. The failure detection and maintenance section shifts to, when the open-circuit failure detecting section detects the open-circuit failure, a circuit state during the open-circuit failure and maintains the circuit state to which the failure detection and maintenance section shifts. The short-circuiting section short-circuits, when the failure detection and maintenance section maintains the circuit state during the open-circuit failure, both ends of the light emitting device in which the open-circuit failure is detected.
Inventors:
Yanagi Se Prosperous
Application Number:
JP2013041750A
Publication Date:
July 05, 2017
Filing Date:
March 04, 2013
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
H05B37/02; G03B21/14
Domestic Patent References:
| JP2005129691A | ||||
| JP2012049317A |
Attorney, Agent or Firm:
Masatake Shiga
Yoshifumi Saeki
Kazunori Onami
Masayu Horiuchi
Yoshifumi Saeki
Kazunori Onami
Masayu Horiuchi
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