TFT display 4.3 inch 480x272 LCD screen ST7282

Key Specifications/Special Features:

Display type: TFT
LCD size: 4.3 inch (Diagonal)
Number of pixels: 480(H) RGB x 272(V)
Module size: 105.50(W)x 67.20(H)x 2.9(T) mm
Active area: 95.04x 53.86 mm
Interface: RGB
Luminance (cd/m2): 500 (TYP), 12 LEDs
Viewing direction: 12:00
 

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Resistive touch screen
Resistive touch screens are divided into 4-wire system and 5-wire system or more. Now take the 4-wire resistive touch screen as an example to illustrate the structure and working principle of the resistive touch screen OLED Display Module. The resistive touch screen is composed of a glass coated with an ITO transparent conductive layer and a film coated with an ITO transparent conductive layer. The opposite electrodes are separated by insulating gaskets, and the periphery is sealed with glue.
Among them, the left and right ends of the conductive layer of the conductive glass are coated with a silver electrode, x +, x-electrode; the upper and lower ends of the thin film conductive layer are also coated with a silver electrode, Y +, Y-electrode. If a voltage is applied to the x or Y electrodes, a parallel and evenly distributed electric field will be generated between x + and x- electrodes and between Y + and Y- electrodes Passive matrix OLED    .
When working, the voltage is first applied to the X-axis and then to the Y-axis according to the time-sharing principle. When a voltage is applied to X+ and X-, a parallel and evenly distributed electric field will be formed between X+ and X- electrodes. At this time, the voltage on the Y electrode is 0. If you touch a point at this time and make the X electrode and Y electrode contact at that point, then the voltage on the Y electrode will be the divided voltage of the voltage on the X+ and X- at the contact. value. From this, the X coordinate of the touch point can be determined. Similarly, when a voltage is applied between Y+ and Y-, the Y coordinate can also be determined by the voltage on the X electrode Active Matrix OLED.