Invention Grant
US08217586B2 Apparatus and method for dimming a backlight with pseudo-random phase delay
有权
具有伪随机相位延迟的背光调光装置和方法
- Patent Title: Apparatus and method for dimming a backlight with pseudo-random phase delay
- Patent Title (中): 具有伪随机相位延迟的背光调光装置和方法
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Application No.: US12692230Application Date: 2010-01-22
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Publication No.: US08217586B2Publication Date: 2012-07-10
- Inventor: Jingwei Xu , Xianwei Zeng , Xianghao Meng
- Applicant: Jingwei Xu , Xianwei Zeng , Xianghao Meng
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent John J. Patti; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H05B41/16
- IPC: H05B41/16 ; H05B41/24
Abstract:
A method for generating an actuation signal for a light source is provided. A random phase delay for each period of an input signal is generated, where each period is a predetermined length. Each phase delay is added to a predetermined actuation period to generate a sum. The sum is compared to the predetermined length. At least one turn-on and at least one turn-off for each period of the input signal is calculated from the comparison of the sum to the predetermined length, and the actuation signal having each turn-on and each turn-off is generated.
Public/Granted literature
- US20100188012A1 APPARATUS AND METHOD FOR DIMMING A BACKLIGHT WITH PSEUDO-RANDOM PHASE DELAY Public/Granted day:2010-07-29
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