1.54 Inch E-paper SPI Display Module

SKU
DPY.1054
Customer #
MOQ
10
Packaging
1pcs/lot
Unit Price
RFQ
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Introduction

This product is an E-paper device adopting the image display technology of Microencapsulated Electrophoretic Display, MED. The initial approach is to create tiny spheres, in which the charged color pigments are suspending in the transparent oil and would move depending on the electronic charge. The E-paper screen display patterns by reflecting the ambient light, so it has no background light requirement. Under sunshine, the E-paper screen still has high visibility with a wide viewing angle of 180 degree. It is the ideal choice for E-reading.
Communication protocol
 

Working Voltage: 3.3V / 5V

I/O interface: SPI

Display color: Black, White and Yellow

Resolution: 152X152

Gray Level: 2

Local Refresh time: 0.3s

Global Refresh time: 2s

Refresh Power: 26.4mW(typ.)

View Angle: >170°


Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirement.

    CS is slave chip select, when CS is low, the chip is enabled.
    DC is data/command control pin, when DC = 0, write command, when DC = 1, write data.
    SCLK is the SPI communication clock.
    SDIN is the data line from the master to the slave in SPI communication.

SPI communication has data transfer timing, which is combined by CPHA and CPOL.

    CPOL determines the level of the serial synchronous clock at idle state. When CPOL = 0, the level is Low. However, CPOL has little effect to the transmission.
    CPHA determines whether data is collected at the first clock edge or at the second clock edge of serial synchronous clock; when CPHL = 0, data is collected at the first clock edge.

    There are 4 SPI communication modes. SPI0 is commonly used, in which CPHL = 0, CPOL = 0.

As you can see from the figure above, data transmission starts at the first falling edge of SCLK, and 8 bits of data are transferred in one clock cycle. In here, SPI0 is in used, and data is transferred by bits, MSB first.
How to use:


Working with Raspberry Pi
Installing libraries required

If you want to connect your E-paper screen to Raspberry Pi, you should install some necessary libraries, or else the Demo (click to download) below may work improperly. For more information about how to install the Raspberry Pi libraries, please visit the website: Libraries Installation for RPi.

You can find the detailed presentation about the installations of libraries wiringPi, bcm2835 and python.
Hardware connection

Here is the connection between Raspberry Pi 3B and E-paper.

图片.png


Expected result

After the corresponding libraries installed, you can copy the relative programs into your Raspberry Pi, and then enter the corresponding file.
BCM2835: Execute the command: make, to compile the code and generate a file epd. Execute the command: sudo ./epd, the program will run.
WringPi: Execute the command: make, to compile the code and generate a file epd. Execute the command: sudo ./epd, the program will run.
Python: Execute the command: sudo python main.py
The screen displays strings and shapes after whole screen refresh.

The screen displays images and the time after partial screen refresh. This demonstrates the partial refreshing capability.


Package includes:

1 X 1.54 Inch E-paper SPI Display Module


Note: all the descriptions and prices are subject to change without prior notice.

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Shipping Weight/Unit(g): 0.00

Std. Packing Qty. (pcs): 1

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