发明授权
- 专利标题: Aging based white point control in backlights
- 专利标题(中): 背光老化的白点控制
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申请号: US12410204申请日: 2009-03-24
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公开(公告)号: US08390562B2公开(公告)日: 2013-03-05
- 发明人: Cheng Chen , Jun Qi , John Z. Zhong , Victor H. Yin , Wei Chen
- 申请人: Cheng Chen , Jun Qi , John Z. Zhong , Victor H. Yin , Wei Chen
- 申请人地址: US CA Cupertino
- 专利权人: Apple Inc.
- 当前专利权人: Apple Inc.
- 当前专利权人地址: US CA Cupertino
- 代理机构: Fletcher Yoder PC
- 主分类号: G09G3/36
- IPC分类号: G09G3/36
摘要:
Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode based backlight. In one embodiment, the backlight may include two or more strings of light emitting diodes, each driven at a respective driving strength. Each string may include light emitting diodes from a different color bin, and the respective driving strengths may be adjusted, for example, through pulse width modulation or amplitude modulation, to maintain the target white point. In certain embodiments, the driving strengths may be adjusted to compensate for shifts in the white point that may occur due to temperature or aging. A controller may adjust the driving strengths based on feedback from a temperature sensor, from an optical sensor, from a user input, or from calibration data included within the backlight or system.
公开/授权文献
- US20100245228A1 AGING BASED WHITE POINT CONTROL IN BACKLIGHTS 公开/授权日:2010-09-30
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