Systems and methods of pixel calibration based on improved reference values
AssigneeIgnis Innovation Inc.
InventorGholamreza Chaji
Life of this patent
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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.
Claims23
A method for compensating an image produced by an emissive display system having pixels, each pixel having alight-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 electrical output of the pixel;
- 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.
A system for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the system comprising:
- 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 a reference signal with the electrical output of the pixel with, generating a comparison value;
- and a data processing circuit 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.
A method for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the method comprising:
- measuring an electrical output of a pixel;
- integrating a reference current for a reference integration time, generating an integrated reference current value;
- comparing the electrical output of the pixel with the integrated reference current value, generating at least one comparison value;
- and
- adjusting an input for the pixel with use of the at least one comparison value.
A method for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the method comprising:
- measuring an electrical output of a pixel;
- comparing the electrical output of the pixel with an analog reference value, generating at least one comparison value;
- and
- adjusting an input for the pixel with use of the at least one comparison value.
A system for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the system comprising:
- 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, and for integrating a reference current for a reference integration time, generating an integrated reference current value;
- a comparator digitizer coupled to the at least one integrator for comparing the electrical output of the pixel with the integrated reference current value, generating at least one comparison value;
- and a data processing circuit for adjusting an input for the pixel with use of the comparison value.
A system for compensating an image produced by an emissive display system having pixels, each pixel having a light-emitting device, the system comprising:
- 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 an analog reference value, generating at least one comparison value;
- and a data processing circuit for adjusting an input for the pixel with use of the comparison value.
Dependencies are inferred from the claim text.