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Display Update 2.7" - Printable Version +- Pervasive Displays Customer Zone / Technical Support Forum (http://forum.pervasivedisplays.com/cz) +-- Forum: EPD Displays (http://forum.pervasivedisplays.com/cz/forumdisplay.php?fid=78) +--- Forum: EPD Related Questions (http://forum.pervasivedisplays.com/cz/forumdisplay.php?fid=91) +---- Forum: Partial Update (http://forum.pervasivedisplays.com/cz/forumdisplay.php?fid=94) +---- Thread: Display Update 2.7" (/showthread.php?tid=140) |
Display Update 2.7" - JeanPaul - 01-27-2016 Hello, I'm trying to use a 2.7" EPD to show a voltage value. The refresh rate is about 1 Hz. I'm not sure if it’s the right job for this EPD or I'm doing something wrong with partial update, but I'm not getting a good result (ghosting) like some videos on internet. https://www.youtube.com/watch?v=0jLfi62LT08 https://www.youtube.com/watch?v=AMvEiRYjxRw I'm following the steps of this comment: https://github.com/repaper/gratis/issues/19 Is there another way to make partial updates and deal with ghosting? Thanks. RE: Display Update 2.7" - JeanPaul - 01-27-2016 I uploaded a video to help to understand. https://youtu.be/Wgs8EoVNa0I Thanks. RE: Display Update 2.7" - Charming - 01-28-2016 Hello Jean Paul, Thanks for taking the video to us for better understanding your question. 1Hz=1000ms which is ok for the partial update. (can be shorter. ex, 500ms) Your partial update waveform looks correct. I have sent you the sample code via email with an application note. Please check again with the guide and sample source. Let me know if the ghosting remains. Charming Su @ PDi-FAE RE: Display Update 2.7" - JeanPaul - 02-15-2016 Hello Charming Su, Thanks for the sample code. It helped a lot. But some questions remain : 1. Should I turn off EPD between each update or it's okay to keep it energized for a long period ? 2. In the code sent , what is the purpose of ( / * set scan line off ( extra arrangement for partial update)) ? After send all data and scan byte the data is resent and scan byte is left zero ? Thanks for your attention and quick answer. I'm getting better results but still not so good as the internet videos. Jean Paul RE: Display Update 2.7" - Charming - 02-17-2016 Hi Jean Paul,
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