SUBTRACTIVE COLOR BASED DISPLAY WHITE POINT CALIBRATION
First Claim
1. A method for calibrating an electronic display comprising:
- measuring a first optical response of an electronic display, wherein the first response occurs when the electronic display is programmed to display a first mixed color due to image data supplied to a first color subpixel and a second color subpixel but not a third color subpixel;
measuring a second optical response of the electronic display, wherein the second response occurs when the electronic display is programmed to display a second mixed color due to image data supplied to the first color subpixel and the third color subpixel but not the second color subpixel;
measuring a third optical response of the electronic display, wherein the third response occurs when the electronic display is programmed to display a third mixed color due to image data supplied to the second color subpixel and the third color subpixel but not a first color subpixel; and
calibrating a white point of the electronic display based at least in part on the first, second, and third optical responses.
1 Assignment
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Accused Products
Abstract
Systems, methods, and devices for white point calibration using subtractive color measurements are provided. Specifically, a white point of a display may be calibrated using subtractive color measurements rather than merely additive color measurements. In one example, a display having red, green, and blue pixels may measure the responses in a subtractive color space (e.g., CMY) rather than additive color space (e.g., RGB). Measurements of the display response using subtractive color space may involve providing image data to two or more color channels at once. Thus, any crosstalk effect between channels may be accounted for, even though the same crosstalk effect might not be apparent using additive color measurements in which only a single channel color channel were measured.
16 Citations
20 Claims
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1. A method for calibrating an electronic display comprising:
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measuring a first optical response of an electronic display, wherein the first response occurs when the electronic display is programmed to display a first mixed color due to image data supplied to a first color subpixel and a second color subpixel but not a third color subpixel; measuring a second optical response of the electronic display, wherein the second response occurs when the electronic display is programmed to display a second mixed color due to image data supplied to the first color subpixel and the third color subpixel but not the second color subpixel; measuring a third optical response of the electronic display, wherein the third response occurs when the electronic display is programmed to display a third mixed color due to image data supplied to the second color subpixel and the third color subpixel but not a first color subpixel; and calibrating a white point of the electronic display based at least in part on the first, second, and third optical responses. - View Dependent Claims (2, 3, 4, 5)
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6. A system for calibrating a white point of an electronic display, comprising:
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one or more light sensors configured to detect light emitted by the electronic display; and a calibration test controller configured to cause the electronic display to display a series of subtractive colors and program white point calibration parameters of the electronic display based at least in part on the resulting light detected by the one or more light sensors while the electronic display is displaying the series of subtractive colors. - View Dependent Claims (7, 8, 9, 10)
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11. A method for manufacturing an electronic device, comprising:
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providing an enclosure; providing an electronic display having red, green, and blue subpixels, wherein a white point of the electronic display has been calibrated by; measuring a first optical response of the electronic display when the electronic display is programmed to display cyan using only the green and blue subpixels; measuring a second optical response of the electronic display when the electronic display is programmed to display magenta using only the blue and red subpixels; measuring a third optical response of the electronic display when the electronic display is programmed to display yellow using only the red and green subpixels; and calibrating the white point of the electronic display based at least in part on the first, second, and third optical responses; and installing the electronic display into the enclosure. - View Dependent Claims (12, 13, 14)
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15. An electronic display comprising:
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a display panel comprising a plurality of subpixels of different colors; and display driver circuitry configured to provide image data signals to the display panel, wherein the display driver circuitry comprises white point calibration parameters configured to cause the display driver circuitry to provide the image data signals to substantially achieve a desired white point on the display panel, wherein the white point calibration parameters are based on a transformation matrix relating the different colors of the plurality of subpixels to a color space, wherein coefficients of the transformation matrix are based exclusively on subtractive color measurements of the plurality of subpixels of the different colors. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification