Resolution is an important indicator of a 7-inch LCD screen, and it often represents an important indicator of the quality of the 7-inch LCD screen. Do you really understand the 7-inch LCD screen resolution? Did you know that you can also learn other information about the 7-inch LCD screen from the resolution? Today Proculus will share with you about it.

1. Judging horizontal and vertical screens from the 7-inch LCD screen resolution

How to judge horizontal screen and vertical screen from the resolution? In fact, it is very simple, for example, 720*1280, the front number 720 is smaller than the back number 1280, then this situation is vertical screen. And 1280*720 means that the number behind is smaller than the number in front, it is horizontal screen.

2. Judging the display effect from the 7-inch LCD screen resolution

This is very easy to understand, that is, the higher the resolution, the better the display effect, and the more pixels, the richer the displayed colors. Common 7in lcd screen has high resolutions of 720*1280, 1024*600 and so on.

3. Judging the aspect ratio of the screen from the 7-inch LCD screen resolution

Anyone who knows the industry of 7-inch LCD screens must have heard of the aspect ratio. For example, the aspect ratio of a 7-inch LCD screen with a resolution of 1024*600 is a 16:9 display screen. How is this calculated? You can search the formula on the Internet and apply it directly, that is, the result obtained by dividing the resolution is which 7 inch LCD screen is a few ratios. For example, what is the ratio of 1280*800 to a 7-inch LCD screen? 1280/800=1.6, 16:10=1.6666. Then the 7in LCD screen with a resolution of 1280*800 is 16:10.

After reading the above knowledge, do you understand? From the resolution of the 7-inch LCD screen, you can not only know the display effect of the 7-inch LCD screen, but also know that it is a landscape/portrait screen, and know the aspect ratio of this screen.

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From Wiki

Overview

Screen: 7-inch Touch Screen
Resolution: 1024 x 600 (16:9)
Input Signal: HDMI
Module Size: 165.30(W) x121(H) x 7.75(T)
Active Area: 154.21(mm) x 85.92(mm).
This Raspberry Pi touchscreen has HD 1024 x 600 resolution, 16.7M (8bit) color numbers, giving high color restoration display. Rectangular ratio 16:9 displays format conversion. IPS 170° full wide visual angle gives you a crystal-clear viewing experience.
It supports Raspbian/Win7/Win8/Win10(Plug and play), Android/Linux (need to be configured first).
Equipped with Micro USB and HDMI port support, the screen can be connected to the device via HDMI interface and be powered via USB. Achieving touch function powered by USB doesn’t need power cord or drive-free.

Ideal for applications like retro gaming, industrial control, as a secondary monitor, in home automation, for 3D printing control, and as a PC monitoring device.

Burn the System to TF Card

Note：

• Do not install the Raspbian system by means of NOOBS, otherwise there appears touch failure.
  
• On other displays, if you have installed the system on your Raspberry Pi by means of NOOBS, you can still use the 7-inch touch screen.
  
• If you have already installed the system, you can directly skip this chapter. Turn to next chapter to refer to Connect the Raspberry Pi and Screen, and you can get to use the 7-inch touch screen.
  

Step 1
Prepare the tool of image burning. Here we use the Etcher. You can download the software from the link:https://www.balena.io/etcher/

Step 2
Download the complete image on the official website by clicking this link: https://www.raspberrypi.org/downloads/raspbian/.
There are three different kinds of Raspbian Stretches available, among which the Raspbian Stretch with desktop and recommended software will be the best choice if you have no other special requirements.

Step 3
Unzip the package downloaded and you will see the xxxx-xx-xx-raspbian-stretch.img file inside.

• Note: DO NOT extract the file.

Step 4
With the application of Etcher, flash the image file, raspbian into the Micro SD card.

At this point, the Micro SD card pops up. Insert the Micro SD card into the Raspberry Pi.

Connect the Raspberry Pi and Screen

Take out M3 nuts and M3x8+6 single-pass brass standoff to support the 7-inch touch screen.

This 7-inch touch screen is compatible with any version of the Raspberry Pi.
The kit provides 2 types of HDMI cables, of which HDMI to Micro HDMI cable applies to Raspberry Pi 4 Model B, and the other cable, HDMI to HDMI cable is suitable for Raspberry Pi 3 and the lower versions.

Connect the USB cable to Raspberry Pi.

Plug the USB power supply into a socket and connect it to your Raspberry Pi’s power port, and you may find a red LED lighting up on the Raspberry Pi, which indicates that Raspberry Pi is connected to power. As Raspberry Pi starts up (also called booting), raspberries appears in the top left-hand corner on your screen. After a few seconds, the Raspberry Pi Desktop will appear.

Set up the Raspberry Pi Desktop

When you start your Raspberry Pi for the first time, the Welcome to Raspberry Pi application will pop up and guide you through the initial setup. Click Next to start the setup.

Set your Country, Language, and Timezone, then click Next again.

Enter a new password for your Raspberry Pi and click Next. In this step, you need to plug a keyboard into the Raspberry Pi to help you input the new password.

Connect to your WiFi network by selecting its name, entering the password, and clicking Next.

Click Next let the wizard check for updates to Raspbian and install them (this might take a little while).

Adjust the Resolution

For the Raspberry Pi 3 and the lower versions, you need reset the resolution ratio as follows. As for Raspberry Pi 4, when you start up it, the resolution is optimum. If you want to change its resolution, please refer to the next part.

• For Raspberry Pi 3 or Lower Version

Step 1: Open config.txt

sudo nano /boot/config.txt

Step 2: Modify the /boot/config.txt file
  Anyway, now the file config.txt is opened. 
1. Define a custom CVT mode (since Raspberry Pi uses the standard rate when 1024x600 is not included, you need to set the aspect ratio close to 16:9) and add the following lines below #hdmi_force_hotplug=1.

hdmi_cvt=1024 600 60 3 0 0 0

hdmi_cvt=<width> <height> <framerate> <aspect> <margins> <interlace>

2.Find the following lines, delete the "#" mark and modify the value like this:

hdmi_group=2
hdmi_mode=87
....
hdmi_drive=2

hdmi_group=2 means DMT (Display Monitor Timings, the standard typically used on monitors)
hdmi_mode=87 indicates we create a new hdmi mode named 87.  
hdmi_drive=2 selects the Normal HDMI mode. 

After the modification is done, save and exit. For more details about configuring config.txt, refer to Raspberry Pi official website:https://www.raspberrypi.org/documentation/configuration/config-txt.md.

Step 3:Reboot Raspberry Pi.

Reboot the Raspberry pi with the command sudo reboot. 

sudo reboot

• For Raspberry Pi 4 

1.Click the Raspberry Pi icon -> Preferences ->Screen Configuration.

2.Then choose Configure ->Screens -> HDMI-1 -> Resolution -> choose the resolution that you want.

3.After that you need to click the tick icon to save your configure.

Install the Virtual Keyboard

Open a terminal and run the command:

sudo apt-get install matchbox-keyboard 

After the installation is done successfully, click Raspberry Pi icon -> Accessories -> Keyboard to open it.

Resource

7-inch_DIY_Touch_Screen__Datasheet