Novaled is showing their Defect Tolerant white OLEDs. Those displays maintain the appearance of a homogeneously lighted-up surface even in the case of electrical shorts, thanks to the use of its proprietary electrode design. One OLED element consists of two comb-shaped interlocked electrodes, which give a uniform light emission. If a short in one of the stripes appears, the resistance of the stripe will limit the current flow and prevent a further rise of current and temperature, which would otherwise destroy the OLED.

Novaled Ultra Stable OLED prototypeNovaled Ultra Stable OLED prototype
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Merck - Advancing Display, Advancing LifeMerck - Advancing Display, Advancing Life