Waveshare 4.2inch E-Ink Raw Display User Manual

1. Bubuka

This manual provides detailed instructions for the Waveshare 4.2inch E-Ink Raw Display. This display features a 400x300 resolution and communicates via an SPI interface. It is designed for integration with various development boards, including Raspberry Pi, Jetson Nano, Arduino, and STM32 series boards.

Key features include ultra-low power consumption, a wide viewing angle, and the ability to retain content without continuous power, making it suitable for applications such as electronic shelf labels and industrial instrumentation.

Image 1.1: The Waveshare 4.2inch E-Ink Raw Display, showing its dimensions and resolution.

2. Eusi Paket

Paket ngandung item di handap ieu:

1x 4.2inch E-Paper Raw Display

Note: This is a raw display module. A separate driver board is required for operation. For easier testing and comparison, consider purchasing an assembled variant like the 4.2inch e-Paper Module with a driver board.

Package content showing one 4.2inch E-Paper display

Image 2.1: Contents of the product package, featuring the 4.2inch E-Paper display.

3. Features At A Glance

No backlight required, maintaining display content even when powered off.
Ultra-low power consumption, with power primarily needed only during refresh cycles.
lebar viewing angle, offering clear visibility from various perspectives.
400x300 pixel resolution for clear text and graphics.
4 gray scale support for enhanced visual detail.
SPI interface for communication with microcontrollers.
Online development resources and example code available for Raspberry Pi, Jetson Nano, Arduino, and STM32.

Infographic detailing features of the 4.2 inch E-Paper display including size, resolution, viewing angle, display color, grey scale, communication, display panel type, experience, environment, display type, and refreshing capabilities.

Gambar 3.1: Leuwihview of the 4.2-inch E-Paper display's key characteristics and features.

4. Spésifikasi

Parameter	Nilai	Parameter	Nilai
Operasi Voltage	3.3V	Warna tampilan	Hideung / Bodas
Panganteur	3-kawat SPI, 4-kawat SPI	Skala kulawu	4
Outline Dimensi	91.0 x 77.0 x 1.18 mm	Waktos Refresh Pinuh	5s
Ukuran tampilan	84.8 x 63.6 mm	Fast Refresh Time	1s/1.5s*
Titik Pitch	0.212 x 0.212 mm	Waktos Refresh Sebagian	0.4s
Viewdina Angle	> 170°	Kakuatan Refresh	26.4mW (typical)
Resolusi	400 x 300 piksel	Arus sayaga	<0.01uA (ampir euweuh)

*Fast refresh function is only available in V2 version.

Table of specifications for the 4.2 inch E-Paper display, including operating voltage, interface, dimensions, display size, dot pitch, viewing angle, resolution, display color, grey scale, refresh times, refresh power, and standby current.

Image 4.1: Detailed technical specifications of the 4.2inch E-Ink display.

5. Advantages of E-Ink Technology

E-paper displays utilize microcapsule electrophoretic technology for displaying content. The principle involves charged particles suspended in a clear fluid moving to the sides of microcapsules when an electric field is applied. This process makes the microcapsule visible by reflecting ambient light, similar to traditional printed paper.

E-paper displays clearly show images and text under natural light or lamplight, requiring no backlight. They offer a wide viewing angle, nearly up to 180 degrees. This technology is often used in e-readers due to its paper-like visual effect, which reduces eye strain.

Comparison of E-Paper E-Ink display, printed A4 paper, and LCD monitor, showing the clarity of text on E-Ink and printed paper versus an LCD.

Image 5.1: Visual comparison highlighting the clarity and paper-like appearance of E-Ink displays.

6. Aplikasi Examples

The Waveshare 4.2inch E-Ink Raw Display is suitable for a variety of applications due to its unique characteristics:

Aset/Peralatan Tags: For inventory management and tracking.
Shelf Labels: Dynamic pricing and product information in retail environments.
Ngaran Konferensi Tags: Reusable and customizable identification for events.
Instrumen Industri: Displaying data in low-power or harsh environments.
Alat Smart Home: Information displays with minimal power draw.

Rupa-rupa aplikasi examples for E-Ink displays, including supermarket shelf labels, cashier-less stores, foodstuff stores, hospital wards, and conference venues.

Gambar 6.1: Examples of practical applications for E-Ink display technology.

7. Setup jeung Connection

This 4.2inch E-Ink display is a raw panel and does not include an integrated driver board. To operate this display, it must be connected to a compatible driver board or microcontroller with SPI capabilities.

7.1 Komponén diperlukeun

Waveshare 4.2inch E-Ink Raw Display (this product)
Compatible Driver Board (e.g., Waveshare e-Paper Driver HAT for Raspberry Pi, e-Paper ESP32 Driver Board, e-Paper Shield for Arduino/NUCLEO)
Connecting cables (typically FPC cable, depending on the driver board)
Development environment for your chosen microcontroller (e.g., Arduino IDE, Python for Raspberry Pi)

7.2 Connection Steps (General)

Identipikasi Pin: Refer to the pinout diagram of your chosen driver board and the 4.2inch E-Ink display. Common pins include VCC (power), GND (ground), DIN (MOSI), CLK (SCK), CS (Chip Select), DC (Data/Command), RST (Reset), and BUSY.
Connect Display to Driver Board: Carefully connect the flexible printed circuit (FPC) cable of the E-Ink display to the corresponding connector on your driver board. Ensure correct orientation to avoid damage.
Connect Driver Board to Microcontroller: Connect your driver board to your Raspberry Pi, Arduino, ESP32, or other microcontroller using the appropriate headers or cables.
Daya Up: Apply power to your microcontroller and driver board setup.
Setup parangkat lunak: Install the necessary libraries and example code for your specific driver board and microcontroller. Waveshare provides extensive online documentation and examples for various platforms.

For detailed pin connections and programming examples, please refer to the official Waveshare online user manual and documentation for your specific driver board and microcontroller combination. A good starting point is the Waveshare Wiki for e-Paper displays.

Diagram showing various driver board solutions recommended for the 4.2inch E-Paper raw display, including e-Paper HAT, ESP32 driver board, ESP8266 driver board, Arduino/NUCLEO shield, and a raw panel case.

Image 7.1: Recommended solutions for connecting and driving the raw E-Ink display.

8. Ngoperasikeun Tampilan

Operating the 4.2inch E-Ink display primarily involves sending commands and data via the SPI interface from your microcontroller to the display's embedded controller. The display supports full refresh and partial refresh modes.

8.1 Ngamutahirkeun Tampilan

Full Refresh: This mode clears the entire screen and redraws all pixels. It provides the highest image quality and prevents ghosting but takes longer (approx. 5 seconds) and consumes more power. It is recommended for displaying static images or when significant content changes occur.
Partial Refresh: This mode updates only a specific area of the screen. It is much faster (approx. 0.4 seconds) and consumes less power, making it suitable for dynamic content updates like clocks or sensor readings. However, repeated partial refreshes over time may lead to slight ghosting, which can be cleared with a full refresh.

8.2 Konsumsi kakuatan

E-Ink displays are known for their ultra-low power consumption. Power is primarily consumed during the refresh cycle. In standby mode, the display draws less than 0.01uA, making it ideal for battery-powered applications where content does not change frequently.

8.3 Displaying Content

Your microcontroller code will typically:

Initialize the SPI interface and display pins (CS, DC, RST, BUSY).
Send initialization commands to the E-Ink controller.
Prepare the image data (bitmap) to be displayed.
Send the image data to the display buffer.
Issue a refresh command (full or partial) to update the screen.

Refer to the Waveshare example code for your specific microcontroller and driver board for detailed programming instructions and library usage.

9. Pangropéa sarta perawatan

To ensure the longevity and optimal performance of your Waveshare 4.2inch E-Ink Raw Display, follow these maintenance guidelines:

Nanganan kalayan ati-ati: The display panel is fragile. Avoid bending, dropping, or applying excessive pressure to the screen.
Beresih Lembut: Make lawon anu lemes, teu aya lint, rada dampened with water or a mild screen cleaner, to gently wipe the display surface. Avoid harsh chemicals, abrasive materials, or excessive moisture.
Hindarkeun Suhu Ekstrim: Operate and store the display within its specified temperature range (typically 0°C to 50°C). Extreme cold or heat can affect performance and lifespan.
Protect from UV Light: Prolonged exposure to direct sunlight or strong UV light can degrade the display over time.
Listrik statik: E-Ink displays are sensitive to static discharge. Handle the display in an anti-static environment or use appropriate grounding measures.
Manajemén kakuatan: While E-Ink retains content without power, frequent power cycling or improper power-down sequences can potentially stress the display controller. Follow recommended power procedures in your driver board's documentation.

10. Cara ngungkulan

If you encounter issues with your 4.2inch E-Ink Raw Display, consider the following troubleshooting steps:

10.1 Display Not Refreshing or Blank Screen

Pariksa sambungan: Ensure all FPC cable connections are secure and correctly oriented. Verify SPI pin connections (VCC, GND, DIN, CLK, CS, DC, RST, BUSY) between the display, driver board, and microcontroller.
Sasayogian tanaga: Confirm that the microcontroller and driver board are receiving adequate power (3.3V for the display).
Atur Ulang Pin: Ensure the RST pin is correctly toggled during initialization. An improper reset sequence can prevent the display from starting.
Busy Pin: The BUSY pin indicates when the display is performing an operation. Your code should wait for the BUSY signal to clear before sending new commands. If the BUSY pin is stuck high or low, it might indicate a communication issue or a display fault.
Software/Code: Double-check your code for correct SPI communication protocols, display initialization sequences, and image data formatting. Refer to Waveshare's example code for verification.

10.2 Ghosting or Image Retention

Full Refresh: Perform a full refresh cycle. This is the primary method to clear residual images or ghosting.
Partial Refresh Limits: If using partial refresh frequently, occasional full refreshes are necessary to prevent ghosting buildup.
Siklus kakuatan: A complete power cycle (disconnecting and reconnecting power) can sometimes resolve persistent ghosting issues.

10.3 Display Damage

Ruksakna Fisik: Inspect the display for cracks, punctures, or visible damage. E-Ink panels are delicate.
Teu leres Voltage: Nerapkeun vol lepattage can permanently damage the display. Ensure 3.3V operation.

For further assistance, consult the Waveshare Wiki or contact their technical support.

11. Diménsi Garis Besar

The physical dimensions of the 4.2inch E-Ink Raw Display are provided below for integration and design purposes. All measurements are in millimeters (mm).

Technical drawing showing the outline dimensions of the 4.2inch E-Paper display in millimeters. The overall dimensions are 91.00mm by 77.00mm, with the active display area measuring 84.80mm by 63.60mm.

Image 11.1: Detailed outline dimensions of the 4.2inch E-Ink display.

12. Rojongan jeung Sumberdaya

For additional technical documentation, example code, and community support, please visit the official Waveshare Wiki and product page. The online resources provide comprehensive guides for integrating this display with various development platforms.

Online User Manual and Examples: Waveshare 4.2inch e-Paper Wiki

Pabrikan: Waveshare

Jumlah modél: 4.2 inci e-Paper

ASIN: B0751F5T5G

Warranty information is typically provided at the point of purchase or on the manufacturer's official websitus.

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waveshare 4.2inch e-Paper