Subpixel wear compensation for graphical displays

Patent metadata

Field	Value
Publication number	US-10460653-B2
Application number	US-201715606768-A
Country	US
Kind code	B2
Filing date	May 26, 2017
Priority date	May 26, 2017
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A graphical display device includes a plurality of color-specific subpixels spatially distributed across a display region. Subpixel wear compensation is performed for some or all of the color-specific subpixels. For each color-specific subpixel, the compensation may include sampling one or more display signals directed to the color-specific subpixel to obtain a time-series of sampled values. The compensation may further include storing, in non-volatile storage, compensation data for the color-specific subpixel derived from the time-series of sampled values. The compensation may further include driving the color-specific subpixel based on the compensation data.

First claim

The invention claimed is:

1. A method of compensating for subpixel wear in a graphical display device having a plurality of color-specific subpixels spatially distributed across a display region of the graphical display device, the method comprising:
for each color-specific subpixel of a subset of the plurality of color-specific subpixels in which an input display value is generated for each color-specific subpixel of the subset by a host computing device connected to the graphical display device:
sampling one or more display signals directed to the color-specific subpixel to obtain a time-series of sampled values;
storing, in non-volatile storage, compensation data for the color-specific subpixel derived from the time-series of sampled values;
receiving the input display value generated by the host computing device:
applying the compensation data to the input display value to obtain a compensated display value;
driving the color-specific subpixel based on the compensation data, including driving the color-specific subpixel with a compensated display signal based on the compensated display value.

2. The method of claim 1 , further comprising:
for each color-specific subpixel of the subset:
combining two or more initially sampled values of the time-series of sampled values to obtain an accumulated value for the color-specific subpixel; and
deriving the compensation data for the color-specific subpixel from the accumulated value.

3. The method of claim 2 , further comprising:
storing the accumulated value in non-volatile storage; and
updating the accumulated value stored in non-volatile storage by combining one or more subsequently sampled values of the time-series of sampled values with the two or more initially sampled values.

4. The method of claim 3 , wherein the accumulated value is stored in the non-volatile storage of the host computing device connected to the graphical display device.

5. The method of claim 1 , wherein the compensation data is stored in the non-volatile storage of the graphical display device.

6. The method of claim 1 , wherein the compensation data is stored in the non-volatile storage of the host computing device connected to the graphical display device.

7. The method of claim 1 , wherein the compensation data is stored in the non-volatile storage of a remote computing device connected to the host computing device via a network.

8. The method of claim 1 , wherein applying the compensation data to the input display value includes providing signal gain or signal attenuation to the input display value to obtain the compensated display signal; and
wherein the method further comprises:
rebalancing the signal gain or signal attenuation provided to the input display value to increase or maximize a quantity of color-specific subpixels of the subset that have a target compensation value that does not introduce signal gain or signal attenuation.

9. The method of claim 1 , wherein the subset of the plurality of color-specific subpixels includes a first subset of color-specific subpixels corresponding to a first wavelength or wavelength range; and
wherein the plurality of color-specific subpixels further includes a second subset of color-specific subpixels corresponding to a second wavelength or wavelength range that differs from the first subset.

10. The method of claim 9 , further comprising:
for each color-specific subpixel of the first subset, deriving the compensation data from the time-series of sampled values based on a first subpixel wear model; and
for each color-specific subpixel of the second subset, deriving the compensation data from the time-series of sampled values based on a second subpixel wear model that differs from the first subpixel wear model.

11. The method of claim 10 , wherein the first subpixel wear model defines a first relationship between a magnitude of an accumulated value of the time-series of sampled values for color-specific subpixels of the first subset and the compensation data to be derived from the time-series of sampled values for the color-specific subpixels of the first subset; and
wherein the second subpixel wear model defines a second relationship, that differs from the first relationship, between a magnitude of an accumulated value of the time-series of sampled values for color-specific subpixels of the second subset and the compensation data to be derived from the time-series of sampled values for the color-specific subpixels of the second subset.

12. The method of claim 9 , wherein the subset of the plurality of color-specific subpixels further includes a third subset of color-specific subpixels corresponding to a third wavelength or wavelength range that differs from the first subset and the second subset; and
wherein the first, second, and third wavelength or wavelength ranges are selected from a group comprising red, green, blue, white, infrared.

13. A method of compensating for subpixel wear in a graphical display device having a plurality of color-specific subpixels spatially distributed across a display region of the graphical display device, the method comprising:
for each color-specific subpixel of a subset of the plurality of color-specific subpixels:
sampling one or more display signals directed to the color-specific subpixel to obtain a time-series of sampled values;
storing, in non-volatile storage, compensation data for the color-specific subpixel derived from the time-series of sampled values;
driving the color-specific subpixel based on the compensation data;

wherein the one or more display signals are sampled by a host computing device, and the compensation data is derived from the time-series of sampled values by the host computing device for each color-specific subpixel of the subset; and
wherein the method further comprises, for each color-specific subpixel of the subset:
receiving, from the host computing device, the compensation data at the graphical display device,
applying the compensation data at the graphical display device to an input display value received from the host computing device to obtain a compensated display value, and
wherein driving the color-specific subpixel based on the compensation data includes driving the color-specific subpixel with a compensated display signal that is based on the compensated display value.

14. The method of claim 13 , further comprising:
for each color-specific subpixel of the subset:
combining two or more initially sampled values of the time-series of sampled values to obtain an accumulated value for the color-specific subpixel; and
deriving the compensation data for the color-specific subpixel from the accumulated value.

15. The method of claim 14 , further comprising:
storing the accumulated value in non-volatile storage; and
updating the accumulated value stored in non-volatile storage by combining one or more subsequently sampled values of the time-series of sampled values with the two or more initially sampled values.

16. The method of claim 13 , wherein the subset of the plurality of color-specific subpixels includes a first subset of color-specific subpixels corresponding to a first wavelength or wavelength range;
wherein the plurality of color-specific subpixels further includes a second subset of color-specific subpixels corresponding to a second wavelength or wavelength range that differs from the first subset; and
wherein the method further comprises:
for each color-specific subpixel of the first subset, deriving the compensation data from the time-series of sampled values based on a first subpixel wear model;

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Morris Matthew
• Zheng Ying
• Choi Minhyuk
• Dighde Rajesh Manohar

Classifications

• H04N1/00045

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• G09G2320/0295

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