Method and system for programming, calibrating and/or compensating, and driving an LED display
First Claim
1. A method of compensating for a degradation of a pixel having a driving circuit for driving current through a light emitting device based on an input, the method comprising:
- receiving luminosity data;
determining a compensation headroom for compensating for the degradation of the pixel;
determining a compression factor with use of said compensation headroom;
scaling the luminosity data by the compression factor to create compressed data;
compensating for the degradation of the pixel by adjusting the compressed data to create compensated data; and
supplying the driving circuit based on the compensated data.
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Accused Products
Abstract
A method and system for programming, calibrating and driving a light emitting device display, and for operating a display at a constant luminance even as some of the pixels in the display are degraded over time. The system may include extracting a time dependent parameter of a pixel for calibration. Each pixel in the display is configured to emit light when a voltage is supplied to the pixel'"'"'s driving circuit, which causes a current to flow through a light emitting element. Degraded pixels are compensated by supplying their respective driving circuits with greater voltages. The display data is scaled by a compression factor less than one to reserve some voltage levels for compensating degraded pixels. As pixels become more degraded, and require additional compensation, the compression factor is decreased to reserve additional voltage levels for use in compensation.
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Citations
23 Claims
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1. A method of compensating for a degradation of a pixel having a driving circuit for driving current through a light emitting device based on an input, the method comprising:
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receiving luminosity data; determining a compensation headroom for compensating for the degradation of the pixel; determining a compression factor with use of said compensation headroom; scaling the luminosity data by the compression factor to create compressed data; compensating for the degradation of the pixel by adjusting the compressed data to create compensated data; and supplying the driving circuit based on the compensated data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of compensating for a degradation of a pixel in a display having a plurality of pixels said pixel having a driving circuit for driving a current through a light emitting device based on an input, the input being supplied to the driving circuit by a display driver, the method comprising:
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receiving luminosity data; determining a compensation headroom for compensating for the degradation of the pixel; determining a compression factor with use of the compensation headroom; scaling the luminosity data by the compression factor to create compressed data; compensating for a degradation of a pixel in the display by adjusting the compressed data based on the degradation to create compensated data; and sending the compensated data to the display driver. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification