Display Test

From high-speed, automated inspection systems for quality control on the production line, to high-precision solutions for R&D, Radiant‘s expertise in display test is unmatched. World leaders rely on Radiant display test and measurement solutions to improve supply chain performance, reduce production costs, and ensure a high-quality end product. Our automated visual inspection systems accommodate multiple screen sizes and technologies, including LCD, OLED, projection, and more. Systems can be implemented throughout the display manufacture process to test display quality every step of the way for fully-automated quality control.

Backlight Units (BLU)

Uniformity Testing for BLUs

Light leakage and non-uniformity in LCD and LED backlight units (BLUs) can render the performance of the assembled display unacceptable. Testing for these conditions by the human eye is inaccurate and not repeatable. Using spot measurement devices provides insufficient information with unacceptably long cycle times. Radiant’s TrueTest™ Software comes with a library of predefined tests, including brightness and color uniformity, chromaticity, and contrast in panel display inspection – ensuring that every BLU meets performance standards.

Display Panel Modules

Detection of Foreign Material

For suppliers of glass, film, and other sub-assemblies, early identification of defects using imaging colorimeters reduces overall production costs by preventing additional investments from being made in the production of flawed assemblies. Detection of foreign material, including dirt or fibers, can be performed at key points in the manufacturing process to avoid locking in these defects under film or glass. Unlike human inspection, a Radiant automated visual inspection system can repeatably find and size significant small defects instantaneously, regardless of their location.

Light Leakage

Light leakage is a common problem in LCD modules, which can result from physical damage during the manufacture process or from faulty sub-components. Radiant’s TrueTest systems detect and classify light leakage problems before products leave the factory. This proven technology gives repeatable and accurate results across production lines at different manufacturing locations.

Final Assembly

Quality Inspection of Consumer Electronics

Makers of smartphones, tablets, and other display devices rely on Radiant to ensure a perfect end-user experience. An automated visual inspection system comprised of TrueTest Software and a ProMetric® Imaging Colorimeter or Photometer enables manufacturers to test display quality and identify defects with greater accuracy, efficiency, and completeness than manual inspection methods. Users can tailor pass/fail criteria to address their individual quality concerns, including line and pixel defects, light leakage, non-uniformity, and mura detection, as well as assembly verification and surface inspection of non-illuminated components and assemblies.

Embedded Displays

Quality Inspection and Defect Detection in Specialized Displays

Integrators of specialized displays for the automotive, aerospace, medical, and other industries need accurate quality inspection solutions to ensure consistent display performance in any environment. Radiant’s integrated inspection solutions allow manufacturers to focus on their total product, rather than the display alone, and rely on Radiant to apply our expertise in display test for easy measurement and control of light, color, contrast, and angle in changing lighting conditions.

Related Links:

Blog: Improving Quality Inspection of Flat Panel Displays
White Paper: OLED Display Production Testing Efficiency and Yields
Presentation: Mura and Defect Detection with TrueTest™
Presentation: Automated Visual Inspection for Automotive FPDs