E-paper waveforms are electronic signals used to control the display of an e-paper screen. These waveforms drive the display's pixels to show the desired content.
It's important to note that creating and modifying e-paper waveforms requires technical knowledge and expertise. Mishandling of the waveforms may result in damage to the display and other components of the e-paper device.
That being said, experimenting with e-paper waveforms can be a fascinating and rewarding experience, as it allows for the creation of unique and customized e-paper displays.
This project uses a 2.9" black/white/red e-paper display, an ESP32 development board, and a 6-digit LED display (TM1637) to display the timings. The e-paper display should be compatible with an SSD1619A controller such as the 2.9" HINK-E029A14 (for example, 7 LUT groups, no state repeat. The waveform is 76 bytes).
Connect the display as follows:
| epaper | ESP32 |
|---|---|
| MOSI | 23 |
| CLK | 18 |
| CS | 5 |
| DC | 17 |
| RST | 16 |
| BUSY | 4 |
| TM1637 | ESP32 |
|---|---|
| CLK | 13 |
| DIO | 15 |
click the image below for a video
Create "pass.h" file with your Wi-Fi credentials, or fill the appropriate variables in "main.cpp". On startup, the ip-address appears on the epaper display. Point your browser there to start.
Tip: If you want to see in detail what's happening, record a video of the e-paper updating in slow motion. The LED display is synchronized with the groups and phases and counts the repeats.
Zhang, Hu, Zichuan Yi, Liming Liu, Feng Chi, Yunfeng Hu, Sida Huang, Yu Miao, and Li Wang. 2022. "A Fast-Response Driving Waveform Design Based on High-Frequency Voltage for Three-Color Electrophoretic Displays" Micromachines 13, no. 1: 59. https://doi.org/10.3390/mi13010059
LUT playground is created by Nic Limper. If you like it and find it useful, please consider buying my a coffee on https://ko-fi.com/nicli.