4.2 inch E-Paper 4c Display: Difference between revisions
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Revision as of 21:24, 23 August 2026
E-Paper
Introduction
1. 4.2 inch 4‑color e‑paper, supports black, white, red and yellow display.
2. 400×300 resolution for clear display.
3. SPI interface for easy secondary development.
4. Supports full refresh and fast refresh modes.
5. Ultra‑low deep‑sleep power consumption, suitable for battery power supply.
6. Image retention after power off, content remains displayed without power.
7. Perfect for making digital photo albums.
Specifications
| Model No. | DEPG0420RYF668F38 |
|---|---|
| Size | 4.2 inch |
| Driver IC | JD79668 |
| Type | Graphic Matrix |
| Resolution | 400×300 |
| PPI | 119 |
| Outline Dimension (mm) | 91×77×1.0 |
| Viewing Area (mm) | 84.8×63.6 |
| Pixel Pitch (mm) | 0.212×0.212 |
| Operating Temperature | 0℃~40℃ |
| Storage Temperature | -25℃~70℃ |
| Connector | 24 PIN, 0.5mm pitch |
| Interface | SPI |
| Display Colors | Black, White, Red, Yellow |
| Typical Power (mW) | 12 |
| Deep‑Sleep Power (mW) | 0.003 |
| Full‑Screen Refresh Time (s) | 20 |
| Fast Refresh Time (s) | 12 |
| Weight (g) | 13.08±0.5 |
Hardware
1. Compatible with ESP8266, ESP32, STM32 and Arduino series motherboards, connected through an efficient SPI interface, and accompanied by detailed technical documentation and operation manuals to simplify the development process.
2. You can use the following dedicated test board to quickly and conveniently verify our program demo, effectively providing development progress.
(1) ESP8266 E-paper Development Kit
(2) ESP32 E-paper Development Kit
Size
FAQ
Q: What communication interface does this 4.2‑inch e‑paper screen support?
A: It adopts SPI interface. The main controller can send image data and control the screen via SPI bus for easy development.
Q: What is the refresh speed of the screen? Will there be ghosting issues?
A: Full‑screen refresh takes 20 seconds, and fast refresh takes 12 seconds. Due to the characteristics of 4‑color e‑paper, slight ghosting may occur in fast‑refresh mode, which can be eliminated by performing one full refresh.
Q: What colors can this e‑paper screen display? Does it support color gradients?
A: It only supports four fixed display colors: black, white, red and yellow. It does not support color gradients or grayscale effects. Image materials need to be pre‑processed into these four colors before sending to the screen.
Downloads