e-Paper Display

4.05-Inch E-Paper Display Module – a-Si TFT Display

Display and controller solution support for engineering-driven projects.

Display Type: a-Si TFT Active Matrix E-Paper Display
Colors: Black / White / Red / Yellow
Surface Treatment: Anti-Glare, Hardness 3H

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For faster evaluation, please share your target application, display size, resolution, interface, touch requirement, controller board requirement, and annual demand.

Category: e-Paper Display

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4.05-Inch E-Paper Display Module - a-Si TFT Display

Engineering Review

Confirm Product Fit Before Sampling

Display and controller board projects usually require more than a model number. RJY can review your technical requirements before sample or quotation discussion.

Specification Matching

Check display size, resolution, brightness, viewing angle, touch requirement, and operating environment.

Interface & Board Review

Review interface type, pin definition, controller board requirement, driver IC, and system compatibility.

Customization Direction

Discuss cover glass, backlight, touchscreen, FPC, firmware, and mechanical coordination when needed.

RFQ Preparation

Prepare application details, sample quantity, annual demand, target timeline, datasheet, or reference product.

Description
FAQ

RJY Display proudly presents a 4.0-inch E-Paper Display designed for ultra-low power applications that require exceptional sunlight readability and wide viewing angles. Featuring a four-color display capability and anti-glare surface, this module is ideal for applications such as smart labels, retail price tags, industrial instruments, IoT devices, and e-shelf signage.

Item	Specification	Unit	Note
Display Size	4.0	inch	Approximate diagonal
Outline Dimension	80 (H) × 80 (V) × 0.9 (T)	mm	Compact square design
Active Area	75.504 (H) × 69.888 (V)	mm
Pixel Resolution	832 × 768	pixels	High-density pixel matrix
Pixel Pitch	90.75 × 91	μm
Pixel Arrangement	Vertical stripe	—
Color Display	Black / White / Red / Yellow	—	4-color e-paper
Surface Treatment	Anti-Glare, Hardness 3H	—	Durable and glare-resistant
Driver Element	a-Si TFT	—	Active matrix
COG Driver	OTP layout (BOE compatible)	—
EPD Waveform	Provided and downloadable via BOE tools	—

Key Features

Display Size: 4.05 inches (diagonal)
Resolution: 832 × 768 pixels
Pixel Pitch: 90.75 × 91 μm
Active Area: 75.504 × 69.888 mm
Outline Dimension: 80 × 80 × 0.9 mm
Display Colors: Black / White / Red / Yellow
Surface Treatment: Anti-Glare, 3H Hardness
Pixel Arrangement: Vertical stripe
Driver Element: a-Si TFT Active Matrix
COG Driver IC: OTP layout, compatible with BOE interface
EPD Waveform: Supplied and downloadable via BOE platform

Product Advantages

✅ Ultra-Low Power Consumption: Ideal for battery-powered applications that require long standby times.
✅ Four-Color Display: Supports multi-color static content for enhanced user engagement and information categorization.
✅ Wide Viewing Angle & Paper-Like Readability: Perfect for use under direct sunlight, with minimal eye strain.
✅ Durable Surface: 3H anti-glare coating resists scratches and reflections.
✅ Slim Profile: Only 0.9 mm thick, making it suitable for compact embedded devices.

Applications

Smart Labels & ESL (Electronic Shelf Labels)
Industrial Control Panels
E-Price Tags and Signage
Smart Home Interfaces
Healthcare Devices and Wearable Equipment

Why Choose This E-Paper Display?

With its square shape and high pixel density, the 4.05-inch e-paper module offers superior legibility and form factor flexibility. The support for red and yellow accents makes it especially useful for highlighting alerts, pricing changes, or visual cues in critical environments.

Need a datasheet, integration guide, or customization support?
Contact our team to explore how this module can fit into your next innovative project.

FAQ

Is RJY an Original Equipment Manufacturer (OEM)?

Yes. RJY is a direct provider and manufacturer with vertically integrated capabilities, offering full-cycle hardware innovation from design and PCBA assembly to final system integration.

What types of customization does RJY accept?

We can provide customization in the following four distinct areas: Systems & HMI、Display Modules、Software Services、Industrial Design.

What is the stock status for this product?

Most products on display have at least one unit in stock for testing or quick sampling. For sample requests over 20 units, please check with us in advance to ensure the current stock status.

How are the fees structured for custom projects?

Our custom project fees typically consist of two main components:
NRE (Non-Recurring Engineering) fees and unit pricing.
In many cases, if your order reaches a certain volume, we offer to offset or credit a portion of the NRE fees back to you.

How long does a typical customization project take?

The timeline depends on the depth of customization:
Software/Firmware Tweaks: 1-2 weeks
Minor Hardware Modifications: 4-6 weeks
Full-Cycle R&D Projects: 12-16 weeks

Knowledge Hub

4.05-Inch E-Paper Display Module – a-Si TFT Display