发明名称 |
Control of light-emitting-diode backlight illumination through frame insertion |
摘要 |
System(s) and method(s) are provided to regulate backlighting in a light emitting diode (LED)-based display through a sequence of alternate pulse-width-modulation (PWM) frame or sub-frame insertions. Alternate PWM frames or sub-frames can be black or non-black. A plurality of pixels in the display is partitioned into at least one zone including one or more rows of pixels; the at least one zone determines sub-frame period based on refresh frequency of the display. A sequence of alternate PWM sub-frames includes at least one alternate sub-frame and at least one normal sub-frame. Alternate PWM frames or alternate PWM sub-frames include a phase delay during which a backlight unit is turned off, and a PWM sequence in which the backlight unit is turned on with a finite duty cycle for the remainder of the PWM frame or sub-frame. A sequence of alternate PWM sub-frames can be configured internally or externally. Internal configuration can be synchronous with a reference signal whereas external configuration relies on external reference signal.
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申请公布号 |
US8378961(B2) |
申请公布日期 |
2013.02.19 |
申请号 |
US20100688742 |
申请日期 |
2010.01.15 |
申请人 |
ATMEL CORPORATION;SANGAM DILIP;VIRAJPET BALAJI VENUGOPAL;DHAYAGUDE TUSHAR |
发明人 |
SANGAM DILIP;VIRAJPET BALAJI VENUGOPAL;DHAYAGUDE TUSHAR |
分类号 |
G09G3/36 |
主分类号 |
G09G3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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