Thread: Forma wedge-side light issue
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Old 01-22-2020, 10:54 PM   #93
davidfor
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Quote:
Originally Posted by NiLuJe View Post
It's also just plain hard to get right. The Kindle Oasis 3 took lab126 an *extremely* large amount of iterations to get right, much more so that any other previous devices (and some were already taking the cake, with a crapload of of prototype iterations).
I remember seeing the details on how the lighting is done for eink. (My words: Shine a light in the edge of a thin sheet of plastic, and put imperfections in the plastic so that the light is reflected down on the screen but when it is reflected off the screen it passes straight through that thin sheet of plastic.) After seeing that, I'm more surprised that the light is as even as it is.

But, I have wondered about how the grey stripe is created. Are the LEDs not quite in the right? Or was the design of the light layer wrong? Or did they try something to hide the light cones that were common in older screens, but got it wrong. Any of those could be hard to fix and probably not something that can be done on the factory floor.
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