21.5inch FHD LCD

From Waveshare Wiki
Jump to: navigation, search
21.5inch FHD LCD
21.5inch FHD LCD.jpg

IPS, 1080x1920
{{{name2}}}

{{{name3}}}

{{{name4}}}

{{{name5}}}

{{{name6}}}

Features

  • 21.5-inch IPS screen, 1080 x 1920 hardware resolution.
  • 10-point capacitive touch with toughened glass panel, hardness up to 6H.
  • With the operating temperature of -5~60℃, can be widely applied.
  • Adopting optical bonding technology for better display.
  • When working with Raspberry Pi, it supports Raspberry Pi OS/Ubuntu/Kali and Retropie.
  • When used as a PC monitor, it supports Windows 11/10/8.1/8/7.
  • Supports Ubuntu when it working with Jetson Nano.
  • Supports multilingual OSD menu (can be used for power control, brightness/contrast adjustment, etc.)

Parameters

Item Description Unit
Model 21.5inch FHD Monitor /
Dimensions 21.5 Inch
Viewing Angle 170 Deg
Resolution 1080 × 1920 Pixels
Overall Dimensions 519.38(H) × 301.00(V) × 18.00(D) mm
Display Area 478.65(H) × 260.28(V) mm
Pixel Pitch 0.1335(H) × 0.1335(V) mm
Color Gamut 72% NTSC
Default Brightness 350 cd/m²
Contrast 1000:1 /
Backlight Adjustment OSD menu /
Refresh Rate 60 Hz
Display Interface Standard HDMI port /
Power Port 12V /
Default Power Consumption 24 Watt

Electrical Specification

Parameter Min. Value Standard Value Max. Value Unit Note
Input Voltage 11.5 12.00 12.5 V Note 1
Input Current 2 2 TBD A Note 2
Operating Temperature -5 25 60 ℃ Note 3
Storage Temperature -10 25 70 ℃ Note 3
  • Note 1: Input voltage exceeding the maximum value or improper operation may cause permanent damage to the device.
  • Note 2: The input current must be ≥2A, otherwise, it will cause startup failure or abnormal display, and it may cause permanent damage to the device if it is in an abnormal state for a long time.
  • Note 3: Please do not store the display in a high-temperature and high-humidity storage environment for a long time. The display must work within the limited value range, otherwise, the display may be damaged.

Usage Guide

Working with PC

Support Windows 11/10/8.1/8/7 Systems

How to Use:

  1. Connect the 12V 2A power adapter to the DC power port of the LCD.
  2. Connect the Touch port of the LCD to the USB connector of the PC, Windows will automatically recognize the touch function.
  3. Connect the LCD and the PC via the HDMI interface, Windows will automatically recognize the display function.
  • Note:
  • Some PCs do not support the plug-and-play function of the HDMI device, but it can be used normally after restarting the system.
  • If the power supply of the USB port is insufficient, the LCD will flicker. After connecting an external 5V 1A power adapter to the Power interface of the LCD, it can be operated normally.

21.5inch FHD LCD PC.jpg

Windows Touch Calibration

Take Windows 10 as an example:

  • 1. Enter the Windows settings of the system, type in the search bar, and click "Calibrate the screen for pen or touch input" (as shown in the picture below):

Win10 touch011.png

  • 2. Click "Setup" in the pop-up "Tablet PC Settings" interface:

Win10 touch02.png

  • 3. The following text prompt will appear on the screen. Please tap the touch screen with your finger, and the computer will recognize it as a touch screen.
【Note】If the touch screen is blank, press the "Enter" key, and the text prompt will switch to the touch screen. (The screen which displays the text prompt will be used as a touch screen!)

Win10 touch03.png

Working with Raspberry Pi

Hardware Connection

  1. Connect the 12V 2A power adapter to the power port of the LCD.
  2. Connect the Touch port to the USB interface of the Raspberry Pi.
  3. Connect the LCD and the Raspberry Pi via the HDMI interface.

21.5inch FHD LCD RPI.jpg

Software Setting

This setting is used for Raspberry Pi OS/Ubuntu/Kali or Retropie system.

  • 1. Insert the TF card into the PC, download and use Raspberry Pi Imager to program the corresponding image.

Pan-Tilt Camera WRITEIMAGE01.png

  • 2. After programming the image, open the "config.txt" file located in the root directory of the TF card. Add the following code at the end of config.txt, save the file, and safely eject the TF card.
hdmi_force_hotplug=1
max_framebuffer_height=1920
hdmi_group=2
hdmi_mode=87
hdmi_timings=1080 0 40 20 60 1920 0 2 5 33 0 0 0 60 0 141120000 6
config_hdmi_boost=10
  • 3. Insert the TF card into the Raspberry Pi, power on the Raspberry Pi, and wait for a few seconds. After the system boots up, you should be able to enter the display interface and the LCD should touch normally.

Display Orientation

If you are using a Bullseye/Buster system, you can rotate it as follows:

  • 1. Go to Screen Configuration.

21.5inch FHD Monitor 09.png

  • 2. Rotate as shown below:

21.5inch FHD Monitor 10.png
21.5inch FHD Monitor 11.png
21.5inch FHD Monitor 12.png
If you use other systems, you can rotate the display as shown below:

  • 1. Add the following sentence in the config.txt file (the config file is located in the root directory of the TF card, or /boot):
display_rotate=1 #1：90；2: 180； 3: 270
  • 2. Reboot the Raspberry Pi after saving.
sudo reboot

Touch Rotation

As the touch direction is different after rotating, you need to rotate the touch as shown below:
1. Install libinput

sudo apt-get install xserver-xorg-input-libinput

If the system you want to install is Ubuntu or Jetson Nano, the installation command is:

sudo apt install xserver-xorg-input-synaptics

2. Create xorg.conf.d directory in /etc/X11/. (If the directory exists, you can directly skip to Step 3.) 

sudo mkdir /etc/X11/xorg.conf.d

3. Copy 40-libinput-conf file to the directory created just now. 

sudo cp /usr/share/X11/xorg.conf.d/40-libinput.conf /etc/X11/xorg.conf.d/

4. Edit the file. 

sudo nano /etc/X11/xorg.conf.d/40-libinput.conf

Find the touchscreen part, add the following sentence, and then save. 

 Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"

As shown below:
Touch roate.jpg
5. Reboot the Raspberry Pi. 

sudo reboot

After finishing the above steps, the touch can be rotated 90 degrees.

Note:
90-degree rotation: Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"
180-degree rotation: Option "CalibrationMatrix" "-1 0 1 0 -1 1 0 0 1"
270-degree rotation: Option "CalibrationMatrix" "0 -1 1 1 0 0 0 0 1"

Set the Screen Always On

Some customers want to display without being affected by the screen saver function and can be set as follows. Turn off the screen saver.
Open lightdm.conf. 

sudo nano /etc/lightdm/lightdm.conf

Change lightdm.conf to find "xserver-command" under the [SeatDefaults] section, uncomment it, and change it to read as follows:

#xserver-command=X

Modify to 

xserver-command=X -s 0 -dpms

-s # –: Set the screen saver not to enable.
dpms: Disable power saving management.
Reboot: 

sudo reboot

Set the Screen Off and On

Users can set the screen to turn off and on with the following commands. 

vcgencmd display_power 0
vcgencmd display_power 1

EDID Timing Parameters

If the system on the control board can automatically identify the EDID for display, there is no need to set the relevant timing parameters.

Otherwise, refer to the following EDID settings:

Pixel Clock H Addressable H Blanking V Addressable V Blanking H Front Porch H Sync Width V Front Porch V Sync Width H Image Size V Image Size H Border V Border
141.12 1080 120 1920 40 40 20 2 5 1080 1920 0 0

Dimensions

21.5inch FHD LCD Dime.jpg

FAQ

Question:How can I use PWM brightness adjustment for 21.5inch FHD LCD?

 Answer:

As shown below, removes the triode and the PWM signal is connected to the base of the triode.
21.5inch FHD LCD pwm.png

{{{5}}}


Support



Technical Support

If you need technical support or have any feedback/review, please click the Submit Now button to submit a ticket, Our support team will check and reply to you within 1 to 2 working days. Please be patient as we make every effort to help you to resolve the issue.
Working Time: 9 AM - 6 PM GMT+8 (Monday to Friday)

Retrieved from "https://www.waveshare.com/w/index.php?title=21.5inch_FHD_LCD&oldid=90457"