The touch screen size refers to the diagonal distance of the screen, and the seven-inch touch screen refers to the diagonal distance of the touch screen 17.78 cm. If the 7-inch 16: 9 screen is 15.5cm*8.7cm, if the 7-inch 4: 3 screen is14.2cm *10.67cm. ..

Internationally 1 inch is equal to 2.54 cm. Seven inches is 7*2.54 cm, that is, the size of the seven-inch touch screen is 17.78 cm.

Extended data

The resistive touch screen can be overhauled as follows:

1. Check whether the wires of the touch screen are connected correctly, and whether one of the wires connected to the keyboard port of the host computer (the working voltage of the 5-volt touch screen is taken from the keyboard port) is connected properly. Please check the wires.

2. If it is confirmed that this is not the case, please delete the touch screen driver and restart the computer to reinstall the driver, or replace the driver with an updated version.

3. Check the hardware equipment, and adjust it if there is any conflict between the equipment in the host and the serial port resources. For example, the default IRQ of some network cards after installation is 3, which conflicts with the IRQ of COM2. At this point, the IRQ of the network card should be changed to idle IRQ. It may be that the computer motherboard and the touch screen control box are incompatible. Please replace the host or motherboard.

Baidu encyclopedia-touch screen