Invention Grant
- Patent Title: Method and apparatus to control light intensity as voltage fluctuates
- Patent Title (中): 电压波动控制光强度的方法和装置
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Application No.: US13833284Application Date: 2013-03-15
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Publication No.: US09078325B2Publication Date: 2015-07-07
- Inventor: Jeffrey L. Kulczycki , Nicholas W. Howell , Stephen B. White , Gerard Zettler , Kevin L. Medin
- Applicant: TRW Automotive U.S. LLC
- Applicant Address: US MI Livonia
- Assignee: TRW AUTOMOTIVE U.S. LLC
- Current Assignee: TRW AUTOMOTIVE U.S. LLC
- Current Assignee Address: US MI Livonia
- Agency: MacMillan, Sobanski & Todd, LLC
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B39/02 ; H05B39/04 ; H05B33/08
Abstract:
A method and apparatus for generating a pulse width modulated voltage that has a duty cycle that is inversely proportional to a sensed battery voltage and using the generated pulse width modulated voltage to control a light emitting diode to maintain the intensity of light emitted as the battery voltage fluctuates.
Public/Granted literature
- US20140049177A1 Method and Apparatus To Control Light Intensity As Voltage Fluctuates Public/Granted day:2014-02-20
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