4.2" 4 Color E Ink Display 400x300 E Paper Screens For ESL And Smart Devices

The YE042A203 is a 4.2-inch active matrix e-paper display module designed for low-power industrial and commercial display applications. Featuring a 400×300 resolution and 4-color reflective display technology, this module supports Black, White, Red, and Yellow color rendering for enhanced information classification and visual communication.

Built with ultra-low power consumption and bi-stable display technology, the module only consumes power during refresh cycles, making it an ideal solution for electronic shelf labels, logistics tags, warehouse systems, industrial terminals, smart signage, and battery-powered embedded devices.

The display adopts a pure reflective viewing structure with anti-glare surface treatment, ensuring excellent readability under ambient light and direct sunlight without requiring backlighting.

• 4.2-inch reflective e-paper display module
• 400×300 resolution with 119 DPI pixel density
• 4-color display support: Black / White / Red / Yellow
• Ultra-low power consumption with deep sleep ≤3μA
• Bi-stable technology retains image without continuous power
• SPI communication interface (3-wire / 4-wire selectable)
• Wide viewing angle with paper-like visual effect
• Hard-coating anti-glare surface treatment
• Integrated driver IC with embedded waveform memory
• Built-in temperature sensor for stable refresh performance
• Compact ultra-thin structure only 1.15mm thick
• Industrial-grade reliability and long service life
• Compliant with RoHS, HF and REACH environmental standards

The module supports four independent display colors, enabling clear visual categorization for pricing, warnings, inventory status, logistics priorities, and promotional information.

Different colors can be assigned to different content types:

• Red for alerts or promotions
• Yellow for notices or stock reminders
• Black for detailed information and barcodes
• White for background clarity

This significantly improves readability and operational efficiency in commercial and industrial environments.

Thanks to bi-stable e-paper technology, the display only requires power during content updates and maintains the displayed image even when power is removed.

Typical power characteristics:

• Deep sleep current: ≤3μA
• Refresh power: ≤240mAs
• Long battery operating life for portable devices

Ideal for:

• Battery-powered shelf labels
• Smart tags
• Portable industrial systems
• Wireless IoT terminals

The reflective display structure combined with anti-glare hard coating provides a paper-like viewing experience with no backlight reflection issues.

Benefits include:

• Sunlight-readable display
• Wide viewing angle
• Reduced visual fatigue
• Stable visibility in retail and outdoor environments

The module integrates a highly integrated display controller with:

• Timing control
• Source and gate drivers
• Embedded SRAM
• Voltage generation circuit
• Internal LUT waveform storage
• Temperature compensation system

This reduces external circuit complexity and shortens development time for embedded systems.

With only 1.15mm thickness and lightweight construction, the module can be easily integrated into compact industrial devices and portable equipment.

Suitable for:

• Slim electronic shelf labels
• Handheld terminals
• Embedded control devices
• Smart logistics tags

Suitable for:

• Retail pricing systems
• Smart supermarket labels
• Warehouse inventory labels
• Product information displays

The 4-color display improves product classification and promotional visibility.

Applicable for:

• Smart cargo labels
• Shipping status tags
• Warehouse identification systems
• Inventory management terminals

The reflective screen remains readable under warehouse lighting and transportation environments.

Can be used for:

• Equipment status indicators
• Industrial monitoring terminals
• Maintenance information panels
• Low-power control systems

The ultra-low power design supports long-term stable operation.

Suitable for:

• IoT terminals
• Portable instruments
• Battery-powered controllers
• Smart home display devices

The module supports flexible SPI communication modes:

• 3-wire SPI
• 4-wire SPI

Compatible with mainstream MCU platforms and embedded controllers.

Additional integrated features include:

• Internal temperature sensor
• Embedded waveform memory
• On-chip voltage generation
• Flexible FPC structure
• ZIF connector interface

This helps reduce development complexity and hardware cost.

The display module is designed for long-term commercial and industrial applications and has passed multiple environmental reliability tests.

Supported conditions include:

• High/low temperature storage
• Humidity testing
• Vibration testing
• Transportation impact testing
• Long-term operational stability testing

Environmental compliance:

• RoHS
• HF
• REACH

Customized solutions are available according to project requirements.

Supported customization options include:

Available combinations:

• Black / White
• Black / White / Red
• Black / White / Yellow
• Black / White / Red / Yellow

• FPC layout adjustment
• Connector position modification
• Cable length customization

• Custom dimensions
• Surface printing
• Logo printing
• Protective glass integration

Optional refresh configurations:

• Fast refresh
• Full refresh
• Partial refresh
• Custom waveform optimization

• Low power consumption for battery-powered products
• Clear visibility under ambient light
• 4-color display for enhanced information presentation
• Industrial-grade reliability
• Slim and lightweight structure
• Easy MCU integration
• Suitable for long-term embedded deployment
• Flexible customization support for OEM/ODM projects

• Retail Automation
• Smart Warehousing
• Industrial Automation
• Electronic Shelf Labels
• Logistics Systems
• IoT Devices
• Smart Signage
• Embedded Electronics
• Portable Equipment
• Digital Information Systems
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