Invention Grant
- Patent Title: Laser projection temperature compensation
- Patent Title (中): 激光投影温度补偿
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Application No.: US11829459Application Date: 2007-07-27
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Publication No.: US07822086B2Publication Date: 2010-10-26
- Inventor: Margaret K. Brown , Randall B. Sprague , Michael L. Schaaf , Bin Xue
- Applicant: Margaret K. Brown , Randall B. Sprague , Michael L. Schaaf , Bin Xue
- Applicant Address: US WA Redmond
- Assignee: Microvision, Inc.
- Current Assignee: Microvision, Inc.
- Current Assignee Address: US WA Redmond
- Agent Kevin D. Wills
- Main IPC: H01S3/00
- IPC: H01S3/00
Abstract:
The temperature of a laser diode changes in response to video content across a line of a displayed image, and the radiance changes as a function of temperature. An adaptive model estimates the temperature of the laser diode based on prior drive current values. For each displayed pixel, diode drive current is determined from the estimated diode temperature and a desired radiance value. A feedback circuit periodically measures the actual temperature and updates the adaptive model.
Public/Granted literature
- US20090028199A1 LASER PROJECTION TEMPERATURE COMPENSATION Public/Granted day:2009-01-29
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