Invention Grant
- Patent Title: Method and apparatus for intensity control of multiple light sources using source timing
- Patent Title (中): 使用源定时的多个光源的强度控制方法和装置
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Application No.: US11275204Application Date: 2005-12-19
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Publication No.: US07405384B2Publication Date: 2008-07-29
- Inventor: Tomasz L. Klosowiak , Zili Li , Min-Xian M. Zhang
- Applicant: Tomasz L. Klosowiak , Zili Li , Min-Xian M. Zhang
- Applicant Address: US IL Schaumburg
- Assignee: Motorola, Inc.
- Current Assignee: Motorola, Inc.
- Current Assignee Address: US IL Schaumburg
- Main IPC: G01J1/32
- IPC: G01J1/32
Abstract:
A method and apparatus for controlling light intensity from two or more light sources. A timing scheme is used to modulate the light sources. Light from the light sources is combined to form a beam and a photo-sensor senses the beam. In a time interval when only one of the light sources is activated, the signal from the photo-sensor is monitored and used in a feedback control circuit to control the active light source.
Public/Granted literature
- US20070138372A1 METHOD AND APPARATUS FOR INTENSITY CONTROL OF MULTIPLE LIGHT SOURCES USING SOURCE TIMING Public/Granted day:2007-06-21
Information query
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