The touch display screen is structurally a touch screen and a display screen are entities attached to different glasses with different functions.
The display form of the touch screen and the display screen are two pieces of glass with different thicknesses, and an FPC at the edge of the glass is connected with a corresponding processing chip for processing data, transfer data to the central processing unit (CPU).
The tempered glass on the surface of the touch screen is functionally based on the principle of capacitive induction.
Capacitive touch screen is to attach a layer of transparent special metal conductive substance to the glass surface.
When the finger touches the metal layer, the capacitance of the contact will change, so that the frequency of the oscillator connected to it changes, and the touch position can be determined by measuring the frequency change to obtain information.
The principle of the display screen is completely different from that of the touch screen. TFT display screen, TFT (
Thin Film Transistor)Is the abbreviation of thin film transistor.
TFT display screen is the mainstream display device on all kinds of notebook computers and desktop computers. Each liquid crystal pixel point on this kind of display screen is driven by a thin film transistor integrated behind the pixel point, therefore, TFT display screen is also a kind of active matrix liquid crystal display device.
It is one of the best LCD color displays. TFT display has the advantages of high responsiveness, high brightness, high contrast, etc. Its display effect is close to CRT display.
The 720P display screen we refer to refers to a 720x 1280 pixel display screen, that is, 720 pixels horizontally and 1280 pixels vertically. The multiplication of the two is all the pixels of the display screen.
Tft LCD, so don't confuse the touch screen with the display. Their relationship is like the relationship between the mouse and the keyboard. They are independent of each other, but they cooperate with each other in function.