| Electronics > Projects, Designs, and Technical Stuff |
| Waveshare e-paper display not showing good red colour |
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| Amper:
Hi! I just started playing with a "1.54 inch e-Paper" display module from waveshare, 200x200px b/w/r. https://www.waveshare.com/w/upload/e/e5/1.54inch_e-paper_V2_Datasheet.pdf Im using this lib for control: https://github.com/ZinggJM/GxEPD Black works beautifully, but the red colour is nothing like the images i found, not only in ads but also non commercial videos. Its very pale, in the best case orange, very very bad contrast to the backround. Can i do anything wrong controlling it or is it a faulty display? afaik its supposed to handle all the updating internally so i would be surprised... |
| Miyuki:
Have it any analog adjust or voltage test points ? This color are very sensitive to even slightest changes in voltage, current and timing Like color passive matrix lcd screens, all pixels interact with neighboring ones and you working with minuscule charges levels Somewhere was comparison that it is like playing chess with 5 meters long sticks |
| Amper:
Mh, sadly no adjustment, at least in hardware. The Supply is done by an onboard buck from 5V to 3.3V and since black works bautifully i guess thats not the issue. I just tried heating it a bit to change the viscocity but that also doesnt seem to make a difference. |
| Miyuki:
Black and white is simple to work But colors are in the middle and it must hit that exactly spot, that is tricky |
| Amper:
Mh, thats true, but i dont see how i could effect that? |
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