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WSAL22187 – 12.3inch HDMI LCD/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The 12.3-inch HDMI LCD is a capacitive touchscreen with an IPS panel, 1920×720 resolution and 600 cd/m² brightness. It connects via HDMI and is powered at 12 V; the touch input uses USB. The display supports various host systems such as Raspberry Pi, PC (Windows), and Tinker Board 2.

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Technical overview

  • IPS panel with 1920 × 720 HD resolution and 600 cd/m² maximum brightness
  • Capacitive 10-point control using a laminated tempered glass panel (hardness up to 6H)
  • Operating temperature range from -20 °C to +70 °C
  • Video signal is transmitted over HDMI; audio can also be output through a 3.5 mm jack
  • Touch signal is carried over a USB connection to the host
  • With Raspberry Pi, official RPi OS, Ubuntu, Kali, and Retropie are supported
  • As a PC monitor, Windows 11/10/8.1/8/7 are supported
  • When used with Tinker Board 2, Android and Debian are supported
  • Multi-language OSD menu available for power control, brightness, and contrast adjustments
  • Supply voltage 12 V at a working current of approximately 1.25 A

Commands and examples – verify before use:  

hdmi_group=2
hdmi_mode=87
hdmi_cvt 1920 720 60 6 0 0 0
hdmi_drive=2
disable_splash=1
sudo usermod -G 'input' -a pi
echo 'uinput' | sudo tee -a /etc/modules
KERNEL=="uinput", MODE="0660", GROUP="input"
sudo udevadm control --reload-rules
sudo udevadm trigger
sudo reboot
evdev-rce
[Desktop Entry]
Version=1.0
Type=Application
Name=evdev-rce
GenericName=Enable long-press-to-right-click gesture
Exec=env LONG_CLICK_INTERVAL=1000 LONG_CLICK_FUZZ=200 /usr/local/bin/evdev-rce
Terminal=true
StartupNotify=false

Notes and version constraints

  • The described steps refer to the versions and paths stated in the source text; suitability must be verified for other system versions or paths.
  • The disable_splash=1 entry only removes the colored GPU self-test image at Raspberry Pi startup; whether this is desired should be confirmed.
  • The evdev-rce modifications assume a specific test environment (raspios-bullseye-armhf, 32-bit); behavior may differ on other distributions.
  • In multi-monitor setups, touch input works on the main screen by default; manual calibration is required for other monitors.
  • Some PCs do not recognize HDMI devices plug-and-play; they generally work normally after a system restart.
  • PWM backlight adjustment requires removing a resistor and connecting a cable – a hardware modification that should only be performed by qualified personnel.

Source and revision record

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