To achieve more seamless visuals and better brightness, color and contrast, emerging display technologies are using increasingly small light-emitting elements. That’s good news for those of us on the receiving end of high-quality displays, but a challenge for display manufacturers. Emissive displays — in which images are created from individual pixels of different intensity and color, such as OLED, micro-LED and mini-LED types — are prone to variability dependent on input driving current. This variability can cause non-uniformity that may be visible in a display screen, impacting usability and brand perception.
The ProMetric I61 Imaging Colorimeter was honored by Laser Focus World’s 2022 Innovators Awards. Source: Radiant Vision Systems LLCImaging colorimeters measure light and color values to evaluate light-emitting devices such as displays, back-lit components and light sources; they work by applying internal color filters and calibrations adhering to a model of standard human visual perception defined by the CIE. Yet most imaging systems, according to imaging system provider Radiant Vision Systems, provide insufficient resolution to discern individual pixel output.
Radiant Vision Systems’ answer is its ProMetric I61 Imaging Colorimeter. First introduced in May 2021, the device made news recently when it was honored by Laser Focus World’s 2022 Innovators Awards. The “61” in its name stands for 61-megapixel (9,568 x 6,380) resolution, which the company says is the highest available in an imaging colorimeter using tri-stimulus technology — a filtering design aligned with innate system response to CIE color-matching functions. That translates to highly repeatable values measurements of luminance (brightness) and chromaticity (color), enabling rapid comparisons of values in spatial context to determine qualities such as contrast, uniformity and defects.
The ProMetric I61 measures all pixels in a display while also capturing the entire display in a single image, allowing a complete pixel measurement in less than 2 seconds — making it a fit for production-level applications that include in-line quality control and demura (pixel-uniformity correction).
“The ProMetric I61 is the result of extensive component testing and innovative engineering by the Radiant team to ensure all important qualities of the imaging system — resolution, accuracy and speed — are maximized to meet real manufacturing demands for metrology in automated visual inspection,” said Doug Kreysar, Radiant Vision Systems CEO. “We are proud to have this effort recognized by the 2022 Laser Focus World Innovators Awards.”
