US Patent 7259521 Video driver architecture for AMOLED displays
Patent 7259521 was granted and assigned to Micrel on August, 2007 by the United States Patent and Trademark Office.
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An AMOLED display system, including an AMOLED display panel receiving a video signal, includes a video driver receiving the video signal and generating a video drive signal indicative of the video signal and referenced to a positive power supply voltage of the display panel, and a current driver coupled to an OLED pixel element receiving the video drive signal and the positive power supply voltage and providing a drive current to the OLED pixel element. The drive current is proportional to a current drive voltage which is indicative of the video signal and independent of the positive power supply voltage. In one embodiment, the video drive signal is indicative of the sum of or the difference between the positive power supply voltage and the video signal and the current drive voltage is indicative of the difference between the positive power supply voltage and the video drive signal.
US Patent 07259521 Video driver architecture for AMOLED displays US Patent 7259521 Video driver architecture for AMOLED displays
US Patent 07259521 Video driver architecture for AMOLED displays
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