Systems and methods of pixel calibration based on improved reference values
First Claim
Patent Images
1. A method for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the method comprising:
- repeatedly adjusting an input provided to a pixel until a comparison value substantially equals a predefined value, the comparison value generated from comparing a reference signal with an integrated pixel current value generated from integrating a pixel current output from the pixel for a pixel integration time; and
updating calibration data to compensate a programming of the pixel with use of a final value of the adjusted input provided to the pixel.
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Abstract
What is disclosed are systems and methods of compensation of images produced by active matrix light emitting diode device (AMOLED) and other emissive displays. The electrical output of a pixel is compared with a reference value to adjust an input for the pixel. In some embodiments an integrator is used to integrate a pixel current and a reference current using controlled integration times to generate values for comparison.
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Citations
22 Claims
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1. A method for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the method comprising:
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repeatedly adjusting an input provided to a pixel until a comparison value substantially equals a predefined value, the comparison value generated from comparing a reference signal with an integrated pixel current value generated from integrating a pixel current output from the pixel for a pixel integration time; and updating calibration data to compensate a programming of the pixel with use of a final value of the adjusted input provided to the pixel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the method comprising:
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repeatedly adjusting an input provided to a pixel until a comparison value substantially equals a predefined value, the comparison value generated from comparing a sampled pixel value generated from sampling a pixel output from the pixel and an integrated reference current value generated from integrating a reference current for a reference current integration time; and updating calibration data to compensate a programming of the pixel with use of a final value of the adjusted input provided to the pixel. - View Dependent Claims (10)
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11. A method for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the method comprising:
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repeatedly adjusting an input provided to a pixel until a comparison value substantially equals a predefined value, the comparison value generated from comparing a digital reference value with a sampled pixel value generated from sampling a pixel output from the pixel with use of at least one integrator; and updating calibration data to compensate a programming of the pixel with use of a final value of the adjusted input provided to the pixel.
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12. A system for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the system comprising:
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at least one integrator coupled via a pixel switch to a pixel of said emissive display system for measuring an electrical output of the pixel; a comparator digitizer coupled to the at least one integrator for comparing the electrical output of the pixel with a reference signal, generating a comparison value; and a data processing unit for repeatedly adjusting an input provided to the pixel until the comparison value substantially equals a predefined value, and updating calibration data to compensate a programming of the pixel with use of a final value of the adjusted input provided to the pixel. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification