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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL22187 WSAL22187 – 12.3inch Capacitive Touch Screen LCD, 1920×720, HDMI, IPS, Toughened Glass Panel]
* [https://shop.jw-tech.eu/p/WSAL22841 WSAL22841 – 12.3inch Capacitive Touch Screen LCD, 1920×720, HDMI, IPS, Toughened Glass Panel]

== 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:'''
<syntaxhighlight lang="text">
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
</syntaxhighlight>

== 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 ==
* [https://www.waveshare.com/wiki/12.3inch_HDMI_LCD 12.3inch HDMI LCD - Waveshare Wiki]
* Source revision: 105251
* Captured: 2026-09-03T03:43:02+00:00
* SHA-256: <code>2f9184f12a4700ada8de7f12426754b46cbc78e99e9037b75bd7f3a67ead661b</code>

WSAL22187 – 12.3inch HDMI LCD/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex