The visual quality of an OLED display is determined by the performance of every individual subpixel, but these emitters often vary in luminance and color. Poorly performing subpixels appear at multiple stages of production—from deposition to module assembly—thus a series of quality checks are required along the way.
 |
 |
|
First image: An OLED display with pixel luminance variation. Second image: The same display after measurement and correction using Radiant's demura method.
|
The Solution: Subpixel Measurement and Correction
Radiant Vision Systems provides measurement and inspection solutions for OLEDs that ensure quality from the fabrication level to the panel/assembly level. Radiant’s ProMetric® Imaging Photometers and Colorimeters
measure light and color of every subpixel with precision. Using an optional Microscope Lens, subpixels can be measured in extreme detail, as shown in the image below.
Once OLEDs are applied to their substrate, Radiant’s measurement systems can be used to evaluate luminance and color across the entire panel to measure uniformity and mura. Radiant’s "demura" method can also be applied to correct pixel and subpixel output and increase OLED panel yields.
A ProMetric imaging system and Microscope Lens are used to characterize subpixel layouts, shapes, and color patterns, achieving extreme detail for subpixel characterization and analysis.
