Liquid Crystal Displays. A Comparative Quality Test of Liquid Crystal Displays, Including 12 Variants from 8 Manufacturers

摘要

Displays were overloaded and compared with manufacturers specifications, in order to evaluate the stress margin. The specimens were tested under 4 different environments and conditions for 2000 hours (the expected lifetime being 10 to 30 times longer). Before, during, and after the life tests, displays were inspected visually, the dc-resistance was measured with a single '8' digit connected, and the contrast ratio was measured at one spot on the display. Many displays show considerable degradation, particularly during dry heat and humidity tests. Some displays were completely destroyed.