Product Description
Product Description
The 3.5inch E-Paper Display (G) without Module from Waveshare is a passively reflective raw display for integration into electronic price tags, equipment labels and industrial instruments. It presents information in red, yellow, black and white and retains the last displayed image after power is removed. This version is supplied without a driver board.
Integration uses a 3-wire or 4-wire SPI interface, and the raw display operates at 3.3 V. Its electrophoretic display reflects ambient light rather than using a backlight. Development resources with examples for Raspberry Pi, Jetson Nano, Arduino, STM32 and ESP32 support implementation of the display control.
Highlights
- No backlight is required: the display uses reflected ambient light.
- The last displayed content remains visible for a long time after power is removed.
- Power is essentially required only during image updates.
- A viewing angle greater than 170° allows reading from different positions.
- An online manual and development examples for Raspberry Pi, Jetson Nano, Arduino, STM32 and ESP32 are available.
Technical Features
- Screen diagonal: 3.5 inches; resolution: 384 × 184 pixels.
- Display colors: red, yellow, black and white; stated grayscale level: 2.
- Interfaces: 3-wire SPI and 4-wire SPI.
- Raw display operating voltage: 3.3 V.
- Active area: 79.68 × 38.18 mm; pixel pitch: 0.2075 × 0.2075 mm.
- Outline dimensions: 90.00 × 44.23 × 1.00 mm.
- Full refresh: 20 s; fast refresh: 15 s.
- Refresh power consumption: below 30 mW; standby current: below 0.01 µA.
- Module version with driver board: no.
Application Areas
- Electronic price tags present prices and color-coded information where content changes infrequently.
- Shelf labels retain product information between powered updates.
- Asset and equipment labels use the four colors for visual identification.
- Conference name tags show names and organizational affiliations on a reflective surface.
- Industrial instruments present information that remains unchanged for extended periods without continuous image updates.
Notes
- Ambient light, such as daylight or room lighting, is required for reading.
- The operating voltage specified for the raw display is 3.3 V.
What's Included
- 1 × 3.5inch E-Paper Display (G), raw display with 384 × 184 pixels.
