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Harry, the topic of the diffusion grating structure has been done to death, but I'm curious to hear your&others thoughts. I've had two Kindle Paperwhites (batch 603 and 604), one of which I'm keeping, and two replacements for the not good misaligned screen/line gap 604 one. One only of the three had color hues, the other three had absolutely none regardless of ambient lighting conditions or screen brightness - I thoroughly tested all. Both replacements were batch 502 and 503, and the colour temperature of the LEDs was noticeably warmer - not the crisp white of the batch 600s.
How can three devices of my four sample have zero color hues and one have them if the design makes them almost inherent? Also, how (or WHY) is there suddenly massive variation in screen LED color? It all screams of appalling quality control, and not something befitting a company like Amazon.
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