CIE or Bayer? Selecting the Best Color Filter for OLED & MicroLED Measurement


An imaging system's color measurement accuracy is highly dependent on its internal color filter system. Two kinds of filters are common for color measurement applications of displays—Bayer Pattern (RGB) filters and CIE-Matched Tristimulus (XYZ) filters. Depending on the measurement application, each filter can provide more or less accurate color data. When it comes to emissive displays in particular—such as OLEDs or mini- and microLEDs—highly variable color across the display (due to differences in luminance output at each emissive pixel) is extremely difficult for Bayer Pattern filters to accommodate. As colors deviate from a calibration point, Bayer Pattern systems lose color accuracy, while CIE-match tristimulus systems tolerate much greater deviation.

In this infographic, you will find:

  • Examples of color variability across emissive displays
  • Definitions of CIE-Matched Tristimulus and Bayer Pattern color filters
  • A comparison of Bayer Pattern Filter spectral response to CIE Color Matching Functions (corresponding to the human eye's response to wavelengths of light)
  • An example of color variability tolerance of Bayer Pattern filters versus CIE-Matched Tristimulus filters