How to Use Imaging Colorimeters for Automated Visual Inspection of Displays

The use of imaging colorimeter systems and associated analytical software to assess display brightness, color uniformity, and contrast, and to identify defects in displays, is well established. A fundamental difference between imaging colorimetry and machine vision is imaging colorimetry's accuracy in matching human visual perception for light and color uniformity (and non-uniformity).

In this paper, we describe how imaging colorimetry can be used in a fully-automated testing system to identify and quantify defects in high-speed, high-volume production environments. We cover the test setup, and the range of tests that can be performed, spanning simple point defect detection through complex mura detection and evaluation.

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