2.8-inch TFT LCD Screen 240*320 ST7789 MCU Interface Small Screen

1. Liquid crystal displays require voltage control to generate gray scale. TFT uses thin film transistors to generate voltage to control the display of liquid crystal steering. When a liquid crystal is sandwiched between the upper and lower layers of glass, a parallel plate capacitor is formed, which we call CLC (capacitor of liquid crystal). Its size is about 0.1pF, but in practical applications, this capacitor cannot maintain the voltage to The next time the screen data is updated.That is to say, when the TFT charges this capacitor, it cannot maintain the voltage until the next time the TFT charges this point. (With a general picture update frequency of 60Hz, it needs to be maintained for about 16ms.) As a result, if the voltage changes, the gray scale displayed will be incorrect. Therefore, in the design of the panel, a storage capacitor CS (storage capacitor is about 0.5pF) is usually added to ensure the charging voltage. It can be kept until the next time the screen is updated.But to be precise, the TFT itself grown on the glass is just a switch made of transistors. Its main job is to determine whether the voltage on the LCD source driver should be charged to this point. As for how high this point should be charged The high voltage in order to display what kind of gray scale is determined by the external LCD source driver.

2. Sealant and spacer:

LCD Size :2.8"

Resolution: 240RGBx320

Number of Colors: 262K

NTSC: 55%
Contrast Ratio: 500
Luminance :300 cd/m2
Module Size: 49.9(H)x66.1(V)x2.4(D) mm
Panel Active Area: 43.2x57.6 mm
Pixel Pitch :{{0}}.06x0.18 mm


Driver IC: ST7789V
Driver IC RAM Size :1382400

Operating Temperature: -20~+70 degree
Storage Temperature: -30~+80 degree