7inch HDMI LCD (C)

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7inch HDMI LCD

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Overview

7-inch HDMI display, with a resolution of 1024 × 600 and a capacitive touch panel, which supports Raspberry Pi and can also be used as a computer monitor.

More

Features

  • 7-inch IPS screen with a hardware resolution of 1024 × 600.
  • 5-point capacitive touch control.
  • When used with Raspberry Pi, supports Raspberry Pi OS / Ubuntu / Kali and Retropie
  • Use as a computer monitor, it supports Windows 11 / 10 / 8.1 / 8 / 7, five-point touch, no need to install any drivers.
  • Support Ubuntu when working with Jetson Nano.
  • Support backlight control, more power saving.

7inch HDMI LCD C Spec.png

Specification

Item Description Unit
Model 7inch HDMI LCD (C) /
Size 7.0 Inch
Viewing Angle 170 Deg
Resolution 1024×600 Pixels
Dimension 164.90(H)×106.96(V)×8(D) mm
Display Area 154.21(H)×85.92(V) mm
Pixel Pitch 0.1506(H) x 0.1432(V) mm
Color Gamut 45% NTSC
Max Brightness 300 cd/m²
Contrast 800:1 /
Backlight Adjustment PWM Software Adjustment /
Refresh Rate 60 Hz
Display Interface Standard HDMI interface /
Power Port 5V /
Power Consumption 2.5 Watt

Electrical Parameters

Parameter Min. Value Standard Value Max. Value Unit Note
Input Voltage 4.75 5.00 5.25 V Note 1
Input Current 500 500 TBD mA Note 2
Operating Temperature 0 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 should be ≥500mA, otherwise it will lead to start-up failure or abnormal display, and a long time in an abnormal state may cause permanent damage to the device.
•Note 3: Please do not put the display in a high temperature and high humidity storage environment for a long time, the display needs to work within the limit value, otherwise it will be possible to damage the display.

EDID Sequence Parameters

If the system of the main control board can automatically identify the EDID for display, there is no need to set the relevant timing parameters additionally.
Otherwise, you can 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
49.00 1024 288 600 24 48 96 3 10 154 86 0 0

Interface Introduction

7inch HDMI LCD C Interface.jpg

Standard HDMI interface: control the display.
micro USB interface: for power supply and touch.
Backlight On/Off: for backlight control.

About the version

Rev4.1 version

  • Update the USB touch protocol to improve compatibility.
  • Brightness is adjustable by the USB interface.
  • Modify the drive circuit to enhance the anti-interference ability.
  • Change the touch panel color to black.

Rev3.1 version

  • The Rev3.1 version mainly changes the touch chip of the Rev2.2 version from GT811 to GT911. The touch effect is better, and the anti-interference ability is enhanced at the same time.
  • This version is fully compatible with Rev2.1 and Rev2.2, and users can replace it with confidence.

Rev2.2 version

  • Rev2.2 version mainly adds a VCOM adjustable potentiometer and related circuits of electromagnetic compatibility on the basis of Rev2.1.
  • This version is fully compatible with the Rev2.1 version, and users can replace it with confidence.

Rev2.1 version:

  • Upgrade to IPS screen, with a larger viewing angle and a clearer display effect, I believe you will like it.
  • Use standard HID protocol, you can transplant your own system conveniently.
  • Using with Raspberry Pi, it supports Raspbian / Ubuntu / Kali / Retropie and WIN10 IoT, single touch, no need to install any drivers.
  • Using as a computer monitor, it supports Windows 10 / 8.1 / 8 / 7, five-point touch, no need to install any drivers.

Rev1.1 version:

  • Using private HID protocol, it is difficult to transplant to your own system.
  • Using Raspberry Pi, you need to install a driver when the display connects to Raspbian or Ubuntu systems. and it doesn't support Kali, Retropie, and Windows 10 IoT.

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.

How to use

Working with Raspberry Pi

Hardware Connection

1. Connect the Touch interface to the USB interface of the Raspberry Pi.
2. Connect the HDMI interface to the HDMI interface of the Raspberry Pi.
7inch HDMI LCD C Pi Guides 01.jpg

Software Setting

This LCD can support Raspberry Pi OS / Ubuntu / Kali / Retropie systems. When the LCD works on systems such as Raspberry Pi OS, the resolution must be set manually, otherwise, it will cause an abnormal display.

Please download the latest version of the image on the Raspberry Pi official website.

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

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

3) Open the Win32DiskImager software, select the system image downloaded in step 1, and click 'Write' to write the system image.

4) After the image has finished writing, open the config.txt file in the root directory of the TF card, add the following code at the end of config.txt, then save and quit the TF card safely.

hdmi_group=2
hdmi_mode=87
hdmi_cvt 1024 600 60 6 0 0 0
hdmi_drive=1

5) Insert the TF card into the Raspberry Pi, power on it, and wait a few seconds for a normal display.

Backlight Adjustment

wget https://files.waveshare.com/upload/0/01/Brightness-HDMI.zip
unzip Brightness-HDMI.zip
cd Brightness-HDMI
sudo chmod +x install.sh
./install.sh

5inch-DSI-LCD-3.gif


Working with PC

Support Windows 11 / 10 / 8.1 / 8 / 7

1) Connect the Touch interface of the LCD to the USB interface of the PC. Wait for a while, the windows will automatically recognize the touch function.

2) Connect the HDMI interface of the LCD to the HDMI interface of the PC. Wait for a while, the windows will automatically recognize the display function.

Note:
1) When the computer is connected to multiple monitors at the same time, the touch effect of the 7-inch LCD will be applied to the main screen by default. If you need to specify the touch to the secondary screen, see #Calibration touch on Win 10 PC
2) Some of PC cannot support the HDMI screen Hot Plug. In this case, restarting the PC can solve.
3) Sometimes LCD will flicker because of undersupplying from the USB cable of the PC. You need to connect an external power supply (5V/2A) to the DC port.

Brightness Adjustment on Windows via Software

1. Download and unzip USB Brightness Adjustment Demo.
2. Enter "WS_USB_Brightness_Win.exe", and then Windows can recognize it normally and prompt "the device is connected". You can drag the slider to adjust the backlight.
7C Brightness-1.png

Calibration Touch on Win 10 PC

Take the windows10 system 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

Dimensions

7inch HDMI LCD C Windows.png

Resource

Documents

Software

3D Drawings

FAQ

 Answer:

Add the following command to /boot/config.txt:

disable_splash=1
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 Answer:

Replace the custom image with the image in this directory /usr/share/plymouth/themes/pix/splash.png.

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 Answer:

Test environment: 2022-04-04-raspios-bullseye-armhf 32-bit system
Supported models: Support Waveshare DSI LCD, DPI LCD, and HDMI LCD capacitive touch screen series.

Software Installation

wget https://files.waveshare.com/upload/1/18/Evdev-right-click-emulation.zip
unzip Evdev-right-click-emulation.zip
cd evdev-right-click-emulation
sudo apt install build-essential libevdev2 libevdev-dev
cd 'evdev-right-click-emulation'
sudo cp 'out/evdev-rce' '/usr/local/bin/'
sudo chmod +x '/usr/local/bin/evdev-rce'

Enter the command:

sudo evdev-rce

After running, you can touch and long press to realize the right-click function.

Set IP

sudo usermod -G 'input' -a pi
echo 'uinput' | sudo tee -a /etc/modules
sudo nano  /etc/udev/rules.d/99-uinput.rules

Add in 99-uinput.rules file.

KERNEL=="uinput", MODE="0660", GROUP="input"

save it and run it in the terminal.

sudo udevadm control --reload-rules
sudo udevadm trigger

Then reboot:

sudo reboot

Run after reboot (no sudo needed at this point).

evdev-rce

After running, you can touch and long press to realize the right-click function.

Set Startup

Enter the terminal:

sudo mkdir ~/.config/autostart
sudo nano ~/.config/autostart/right_click.desktop

Add the following in right_click.desktop.

[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

#If you want to modify the sensitivity, you can modify the size of the two parameters, LONG_CLICK_INTERVAL=1000 LONG_CLICK_FUZZ=200.

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 Answer:
  • Edit the config.txt and add this line at the end of the config.txt file:
hdmi_drive=1
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 Answer:
Adjust the adjustable potentiometer on the back. After the desktop is displayed, adjust the potentiometer to the best display effect, and then leave the screen for a while and wait for the ghost to disappear (it may take several hours).

Potentiometer of 7C.jpg


 Answer:
You can try to compile the universal touch driver "hid-multitouch" into the kernel, which generally can make the touch function work.
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 Answer:
The default brightness has been adjusted to the highest, you can reduce the screen brightness by increasing the resistance of these two resistors in the picture below.

The picture below shows the Rev3.1 version, which is similar to other versions.

7inch HDMI LCD FAQ02.jpg


 Answer:
Please run the following command to modify
sudo -E rpi-eeprom-config --edit

Change the DISABLE_HDMI value from 0 to 1, or add the line:

7inchC modification.png
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 Answer:
Using a 5V power supply, the working current of turning on the backlight is about 490mA, and the working current of turning off the backlight is about 90mA.
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 Answer:
First remove the 0 ohm resistor here

7inch HDMI LCD (C) PWM 1.png
Then connect the PWM dimming signal pin to the reserved PWM GND pad
7inch HDMI LCD (C) PWM 2.png
When dimming, the dimming frequency must be greater than 1khz, the voltage is 3.3V, and the duty cycle is set according to customer needs

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