I got word from a CMEL AMOLED user that some displays fail after prolonged exposure to sun. Interestingly, the displays seem to recover if left unpowered for a couple of days (out of the sun, that is). I wonder if any other AMOLED user experienced similar problems? In any case, here's a video they uploaded showing the problematic displays:

The CMEL module used by this company is a C0283QGLC-T. This is a 2.83" diagonal 240x320 full-color AMOLED. CMEL no longer produces AMOLEDs (after the merger into CMI) - but CMI seems to have an active OLED program that will soon go into production.

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Atomic Force Microscopy for next-gen OLED processesAtomic Force Microscopy for next-gen OLED processes