Difference between revisions of "4.3inch DSI LCD"

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Revision as of 03:11, 7 August 2020

4.3inch DSI LCD
4.3inch-DSI-LCD-0.jpg

4.3inch capacitive Touch Screen LCD for Raspberry Pi, DSI Interface
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Introduction

4.3inch Capacitive Touch Display for Raspberry Pi, 800×480, IPS Wide Angle, MIPI DSI Interface

Features

  • 4.3inch IPS screen, 800 x 480 hardware resolution.
  • Capacitive touch panel, support 5-point touch.
  • Supports Pi 4B/3B+/3A+/3B/2B/B+/A+, another DSI-Cable-15cm is required for CM3/3+/4.
  • Tempered glass capacitive touch panel, hardness up to 6H.
  • DSI interface, refresh rate up to 60Hz.
  • When used with Raspberry Pi, supports Raspberry Pi OS / Ubuntu / Kali and Retropie, driver free.
  • Supports software control of backlight brightness.

Work with RPI

Hardware connection

  • Connect the DSI interface of the 4.3-inch DSI LCD to the DSI interface of Raspberry Pi.
  • For easy use, you can fix the Raspberry Pi on the backside of the 4.3inch DSI LCD by screws
4.3inch-DSI-LCD-2.jpg

Software setting

Supports Raspberry Pi OS / Ubuntu / Kali and Retropie systems for Raspberry Pi.
1) Download the image from the Raspberry Pi website.

2) Download the compressed file to the PC, and unzip it to get the .img file.

3) Connect the TF card to the PC, and use SDFormatter software to format the TF card.

4) Open the Win32DiskImager software, select the system image downloaded in step 2, and click 'Write' to write the system image.

5) After the programming is completed, open the config.txt file in the root directory of the TF card, add the following code at the end of config.txt, save and eject the TF card safely. 

dtoverlay=vc4-kms-v3d
dtoverlay=vc4-kms-dsi-7inch

6) Power on the Raspberry Pi and wait for a few seconds until the LCD displays normally. And the touch function can also work after the system starts.

Backlight Control

The backlight brightness can be controlled by entering the following command in the terminal: 

echo X > /sys/class/backlight/10-0045/brightness

Where X indicates any number from 0 to 255. 0 means the backlight is the darkest, and 255 means the backlight is the brightest. For example: 

echo 100 > /sys/class/backlight/10-0045/brightness
echo 0 > /sys/class/backlight/10-0045/brightness
echo 255 > /sys/class/backlight/10-0045/brightness

In addition, Waveshare provides a corresponding application (which is only available for the Raspberry Pi OS system), which users can download and install in the following way: 

wget https://www.waveshare.com/w/upload/f/f4/Brightness.zip
unzip Brightness.zip
cd Brightness
sudo chmod +x install.sh
./install.sh

Once the installation is complete, the program can be opened from the Start Menu -> Accessories -> Brightness, as follows:
43H-800480-IPS07.GIF

Sleep

Run the following commands on the Raspberry Pi terminal, and the screen will enter sleep mode: 

 xset dpms force off

Disable touch

At the end of the config.txt file, add the following command corresponding to disabling touch (the config file is located in the root directory of the TF card and can also be accessed via the command: sudo nano /boot/config.txt): 

disable_touchscreen=1

Note: A reboot is required to take effect after adding the command.

Resources

External guides

Software

Drawing

FAQ

Question: What is the maximum brightness of 4.3inch DSI LCD？

 Answer:
400LUX
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Question: What is the overall thickness of the 4.3inch DSI LCD?

 Answer:
8.70mm
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Question: Will the 4.3inch DSI LCD automatically turn off the backlight when the system sleeps?

 Answer:
No, it won't.
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Question: What is the working current of 4.3inch DSI LCD?

 Answer:
  • The normal working current of raspberry PI 4B alone with 5V power supply is 450mA-500mA；
  • Using 5V power supply raspberry PI 4B+4.3inch DSI LCD maximum brightness normal operating current is 700mA-750mA；
  • Using 5V power supply raspberry PI 4B+4.3inch DSI LCD minimum brightness normal operating current is 550mA-580mA；
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Question:How to adjust the backlight?

 Answer:

You need to remove the resistor and wire the top pad to P1 of Raspberry Pi and control it by PWM.
4.3DSI-1.png

gpio -g pwm 18 0
gpio -g mode 18 pwm
gpio pwmc 1000
gpio -g pwm 18 X（X is in range 0~1024, 0: Darkest, 1024: brightest）
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Anti-Piracy

Since the first-generation Raspberry Pi released, Waveshare has been working on designing, developing, and producing various fantastic touch LCDs for the Pi. Unfortunately, there are quite a few pirated/knock-off products in the market. They're usually some poor copies of our early hardware revisions, and comes with none support service.

To avoid becoming a victim of pirated products, please pay attention to the following features when purchasing:

RPi-LCD-Anti-Piracy.jpg

(Click to enlarge)

Beware of knock-offs

Please note that we've found some poor copies of this item in the market. They are usually made of inferior materials and shipped without any testing.

You might be wondering if the one you're watching or you've purchased in other non-official stores is original, feel free to contact us.

Support

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