Invention Grant
- Patent Title: Semiconductor light source device, semiconductor light source control method, and projection apparatus
- Patent Title (中): 半导体光源装置，半导体光源控制方法及投影装置
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Application No.: US13209528Application Date: 2011-08-15
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Publication No.: US08684539B2Publication Date: 2014-04-01
- Inventor: Hideo Suzuki
- Applicant: Hideo Suzuki
- Applicant Address: JP Tokyo
- Assignee: Casio Computer Co., Ltd.
- Current Assignee: Casio Computer Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Holtz, Holtz, Goodman & Chick, PC
- Priority: JP2010-187236 20100824
- Main IPC: G03B21/20
- IPC: G03B21/20 ; G08B21/00 ; G01R31/08 ; H05B37/00 ; H05B39/00 ; H05B41/00
Abstract:
There is provided a semiconductor light source device including a plurality of semiconductor light source elements connected in series, a drive circuit configured to drive the semiconductor light source elements, a plurality of resistors, each of which is connected in parallel with one of the semiconductor light source elements, respectively, and a determination unit configured to determine the number of elements short-circuited in the semiconductor light source elements based on voltages applied to the resistors when driving of each of the semiconductor light source elements is being stopped.
Public/Granted literature
- US20120050697A1 SEMICONDUCTOR LIGHT SOURCE DEVICE, SEMICONDUCTOR LIGHT SOURCE CONTROL METHOD, AND PROJECTION APPARATUS Public/Granted day:2012-03-01
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