Quote:
Originally Posted by Quoth
It's printed on top of the top of the eink top cover and then the light pipe layer "stuck" on. Next is the touch capacitive parts, which on an integrated panel will be partly deposited on the light pipe layer (probably tin thin enough to be transparent.
So, not easy and some printed inks don't easily dissolve in anything. I did industrial control panel screen printing for a while and once the ink set it wasn't removable. The screens had to be cleaned at once while wet and washing off the stencil was a pain too. It was soft, rollered on, exposed to UV via mask and backing peeled off. Then the unwanted portions washed off (I think where UV was blocked by mask).
We usually charged for a screen too in case we couldn't clean it. We gave it up. Too much work for small runs of custom control panels.
They might be "custom ink jet" printing the CFA (the coloured dots) as they are small for screen printing, but ICs are using 2nm smallest detail photolithography by ASML using short UV light.
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So in that case, would it be possible to buy a 7" Carta 1300 screen and replace the screen of the Libra Colour? Since the vcom and be adjusted, adjust the vcom value and then no more color layer.