How to Use Imaging Colorimeters for Automated Visual Inspection of Displays in Production

摘要

From LCD to OLED to QLED, displays of all kinds are subject to a range of defects introduced either at their component-level or as a result of errors during production. For LCDs and other backlit displays, defects may occur at any position within the many layers that make up the display as a result of anomalies introduced between the layers or manufacturing stress during layer application. For emissive displays like LEDs, OLEDs, and mini- or microLEDs, defects are often inherent at the pixel and subpixel level, where different output luminance at the emitting element may cause variation in brightness and color. Because no production process can guarantee consistency for every single display produced, quality testing for every display on the line is critical.