Please select the most similar patent number from A, B, C and D. Which number is?
A screen calibration method, apparatus and system. The screen calibration method comprises: acquiring chromaticity coordinates of a display screen to be calibrated under different parameters; and storing the parameter corresponding to the closest chromaticity coordinates in a register, thereby achieving screen calibration.
A: Provided are a driving method and driving apparatus (5) for a display apparatus. The method comprises: acquiring chromaticity coordinates, in an RGB colour gamut space, of a sub-pixel corresponding to each pixel unit in a pre-set area (S201); according to the chromaticity coordinates of the sub-pixel in the RGB colour gamut space, respectively calculating data feature values of multiple chromaticity coordinates, in the RGB colour gamut space, of each sub-pixel in the pre-set area (S202); converting the data feature values of the chromaticity coordinates, in the RGB colour gamut space, of the sub-pixel to chromaticity coordinates in an LCH colour gamut space (S203); and if the saturation and hues in the chromaticity coordinates in the LCH colour gamut space meet pre-set conditions, increasing a gamma value of a first sub-pixel and a gamma value of a second sub-pixel in the sub-pixels in the pre-set area according to the pre-set conditions (S204). The increase in adjusted gamma values of a first sub-pixel and a second sub-pixel in sub-pixels can reduce brightness proportions of the first sub-pixel and the second sub-pixel at a large viewing angle with respect to a third sub-pixel, so that the vibrance of a hue of the third sub-pixel at the large viewing angle can be improved, thus serving the function of adjusting colour cast.
B: A calibration method and apparatus for a brightness detection value and a chrominance detection value of an optical camera. The calibration method comprises: dividing a brightness range of a reference display screen into a predetermined number of screen brightness levels; calculating a brightness correction factor; calculating a chrominance correction factor at various screen brightness levels; and using the brightness correction factor and the chrominance correction factor to calibrate a brightness value to be calibrated and a chrominance value to be calibrated which are obtained by an optical camera detecting a display screen to be calibrated, so as to obtain a brightness calibration value and a chrominance calibration value. In this calibration method, a brightness detection value and a chrominance detection value which are obtained through the detection by the optical camera may be corrected as a brightness detection value and a chrominance detection value which are obtained through detection by a reference detection device, so as to reduce errors between a brightness detection value and an actual brightness value and between a chrominance detection value and an actual chrominance value when an optical camera is used to perform brightness and chrominance detections of a display screen.
C: A color temperature calibration method and a color temperature self-calibration system (1000). The color temperature calibration method comprises: enabling a display screen (100) to be measured to display a measurement image at a target color temperature (S100); measuring the chroma of a target pixel in the measurement image to obtain measured color coordinates of the target pixel (S200); comparing the measured color coordinates of the target pixel with standard color coordinates to determine whether the difference between the measured color coordinates and the standard color coordinates is greater than a target threshold (S300); if the difference between the measured color coordinates and the standard color coordinates is greater than the target threshold, adjusting the pixel value of the target pixel, so that the display screen (100) displays the measurement image according to the adjusted pixel value (S400); and acquiring measured color coordinates of the target pixel after adjustment, and comparing the measured color coordinates after adjustment with the standard color coordinates; and if the difference between the measured color coordinates and the standard color coordinates is not greater than the target threshold, ending the color temperature calibration (S500).
D: A method and system for color calibration of a display device, wherein the method comprises: a mobile terminal (10) photographs, after a display device (20) displays a calibration test image, the calibration test image to generate photographing color data of the display device (20); compare the photographing color data with preset photographing color data of a standard light source to obtain a color data difference value; perform data processing on the color data difference value to obtain color adjustment data of the display device (20), so that the display device (20) performs color calibration according to the color adjustment data. By means of the present invention, a display device can be easily and conveniently calibrated by means of a mobile terminal, without using any expensive professional color calibration instrument, and therefore, a common user can also complete color calibration of the display device under a low cost, thereby improving user experience.
Answer: D