Ultra-compact 1.54-inch/1.5-inch Electronic Paper Display
1.54" Ultra-Low-Power E-Paper Display: Sunlight-Visible, Zero Static Power, Perfect for Miniature Wearables & IoT
This display excels where long battery life, outdoor readability, and compact size are critical -- replacing power-hungry LCDs in resource-limited devices.
Product Specifications
| Product |
1.54 Inch SPI EPD |
| Resolution |
152x152 Dots Resolution |
| Pin Number |
8 Pins |
| Interface |
SPI |
| Driver Element |
A-Si TFT Active Matrix |
| Display Mode |
AM EPD |
| Display Color |
Black+White |
| Optics |
All Viewing Angles |
| PCB Outline Dimension |
32(H) × 50(V) × 2.2(D) mm |
| Active Area |
27.512(H) × 27.512(V) mm |
| Pixel Pitch |
181 × 181 (188dpi) μm |
| Compliance |
REACH & RoHS Compliant |
EPD-154BW is an active matrix electrophoretic display (AM EPD) with SPI interface. This 1.54-inch e-ink display module has an effective area of 152×152 pixels and can display images with 1-bit black and white capability. This module is an electrophoretic display driven by a TFT array. The integrated circuits include a gate driver, source driver, MCU interface, timing controller, oscillator, and other DC-DC, SRAM, LUT, VCOM. This module can be used in portable electronic devices, such as electronic shelf label (ESL) systems.
Technical Parameters
| Parameter |
Specifications |
Unit |
| Screen Size |
1.54 |
Inch |
| Display Resolution |
152(H)×152(V) |
Pixel (140 DPI) |
| Active Area |
27.512×27.512 |
mm |
| Pixel Pitch |
0.181×0.181 |
mm |
| Pixel Configuration |
Square |
|
| Outline Dimension |
32.0(H)×50.00(V)×2.5(D) |
mm |
Input/Output Pins
| No. |
Name |
I/O |
Description |
| 1 |
GND |
P |
Ground |
| 2 |
VCC |
P |
Power Supply for the chip |
| 3 |
SCL |
I |
Serial Clock pin (SPI) |
| 4 |
SDA |
I/O |
Serial Data pin (SPI) |
| 5 |
RES# |
I |
Reset signal input. Active Low. |
| 6 |
DC |
I |
Data /Command control pin |
| 7 |
CS |
I |
Chip select input pin |
| 8 |
BUSY |
O |
Busy state output pin |
Core Advantages
- Ultra-Compact Size - 1.5-inch diagonal (1.54" typical active area), ideal for space-constrained designs.
- High Pixel Density - 152×152 resolution (~172 PPI), sharp text/graphics for small displays.
- Zero-Power Image Retention - Bistable e-ink technology: 0 power consumption when static.
- Sunlight Readable & Eye-Friendly - Reflective display: glare-free, paper-like visibility in direct sunlight.
- Wide Viewing Angle - Near 180° viewing with minimal color shift.
- Lightweight & Thin - Minimalist design for portable/wearable integration.
- High Contrast B&W - Crisp monochrome output for clear information display.
- Memory-in-Pixel Support - Built-in memory reduces MCU workload (depends on driver IC).
Target Application Scenarios
- Wearable Tech - Smart bands, minimalist watches, fitness trackers (time, steps, notifications).
- IoT Sensors & Tags - Wireless price tags, inventory trackers, smart labels.
- Portable Medical Devices - Glucose monitors, pill reminders, wearable health sensors.
- Industrial Tools - Compact meters, calibration displays, handheld diagnostic tools.
- Smart Home Devices - Thermostat panels, security keypads, appliance status screens.
- Electronic Accessories - Bluetooth tracker tags (e.g., Tile-style), minimalist smart badges.
- Battery-Powered Indicators - Long-life status displays for remote sensors or environmental monitors.
- Educational/DIY Kits - Low-power projects for students/makers (Arduino/Raspberry Pi).
Key Precautions
- Refresh Limitations - Avoid excessive partial updates to prevent ghosting; periodic full refreshes are mandatory.
- Temperature Sensitivity - Operating Range: -20°C to +70°C. Performance degrades outside this range.
- Voltage Requirements - Strictly adhere to specified logic voltage (e.g., 3.3V/1.8V) and driver voltage.
- ESD Protection - Handle with anti-static precautions. ESD can permanently damage e-ink film.
- Mechanical Stress - Do not bend, press, or puncture the screen. The glass substrate is fragile.
- UV Exposure - Prolonged direct sunlight may accelerate e-ink film degradation.
- Power Sequencing - Follow power-on/off sequences in the datasheet to avoid latch-up or image corruption.
Frequently Asked Questions
Q1: Why is the screen slow to update?
A: E-paper relies on physical particle movement. Full refresh takes ~2s for clean transitions; partial refresh is faster (~0.3s) but may require full refreshes periodically to eliminate ghosting.
Q2: Can I use it with Arduino/Raspberry Pi?
A: Yes, but you'll need a compatible driver board (e.g., SPI interface). Libraries like GxEPD2 (Arduino) or waveshare-epd (RPi) simplify integration.
Q3: Why does the display show ghosting?
A: Caused by incomplete particle realignment. Fix: Trigger a full refresh cycle every 5-10 partial updates. Avoid high-contrast image switches without full refreshes.
Q4: Does it really consume zero power?
A: Yes, when displaying a static image. Power is only consumed during screen refreshes. The controller IC may have minimal sleep current (~5-10µA).
Q5: Can I cut or resize the display?
A: No. The glass substrate and e-ink film are factory-sealed. Physical modification destroys the display.
Q6: Why is my display blank after power-up?
A: Check:
- Voltage levels (logic/VCOM)
- SPI communication signals
- Reset sequence timing
- MCU code initialization routine
Q7: How do I handle image persistence in cold/hot environments?
A: Below 0°C, refresh time increases significantly. Above 50°C, particles move faster but may cause flickering. Use temperature compensation algorithms if supported by the driver IC.
Q8: Is touch functionality supported?
A: No, this is a display-only module. Touch requires an external overlay (not recommended due to added thickness/reflectivity).
Q9: Can I drive it without a controller board?
A: Not recommended. You need a dedicated driver IC (e.g., SSD1681) to generate high-voltage waveforms for e-ink particle movement.
Q10: What causes "burn-in" effects?
A: Unlike OLED, e-paper has no permanent burn-in. However, extreme long-term static images (months/years) may cause temporary retention. Fix: Cycle through full-black/white screens.
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