st7789 tft display made in china

When you find these modules for sale, they are often mistakenly identified as an OLED display but they are in fact IPS LCD which has a similar wide viewing angle to OLED.

In the above example, Node32-Lite and this 0.96-inch LCD.  Please refer to the tutorial here: ST7789 interfacing with ESP32 to make the connections, Arduino library installation, and modification needed for it to works on this LCD.

This is a low-cost but powerful TFT display that makes your project look awesome! The display has 240 x 240 pixels resolution, and its size is only 1.3inch. This allows you to display a high-quality picture, to make your project really cool.

The module interface is SPI, to make the display small the CS pin is not breakout, but you can still drive it without connecting a CS pin, here is a library working library for this particular display, to make it working properly, you also need to install Adafruit’s GFX library.

Long time enjoyer of this driver. Truly awesome. Generally I"m using it with an ILI9341 generic from Hiletgo Amazon, However I just got a new screen from China (an ST7789 according to specs) that"s an 8 pin SPI TFT OLED display. No matter my wiring or my command lines, it just does not want to work. I"ve got to the point where the Reset pin will light up the backlight but it wont" go any further.

Command: cmake -DST7789=ON -DGPIO_TFT_DATA_CONTROL=25 -DGPIO_TFT_RESET_PIN=24 -DGPIO_TFT_BACKLIGHT=23 -DSPI_BUS_CLOCK_DIVISOR=40 -DUSE_DMA_TRANSFERS=ON -DDISPLAY_BREAK_ASPECT_RATIO_WHEN_SCALING=ON ..

IPS lcd is the tft display with supper wide viewing angle, instead of traditional TN tft display have the limited viewing angle, The viewing angle of IPS lcd module could be 178 degree in typical, customer could watch the image in all direction without color inversion and get the high contrast display image. Compare to tn tft, IPS TFT display is more suitable for TFT touch screen, we would introduce Maclight"s IPS lcd modules in the following:

Brilliant color image – this is a huge advance in technology, from a Twisted Nematic (TN) display that only produced 6-bit color, to an 8-bit color display with the IPS technology

PS (In-Plane Switching) lcd is still a type of TFT LCD, different to regular tft in TN (Twisted Nematic) mode, the IPS LCD liquid crystal elements inside the tft lcd cell, they are arrayed in plane inside the lcd cell when power off, so the light can not transmit it via theIPS lcdwhen power off, When power on, the liquid crystal elements inside the IPS tft would switch in a small angle, then the light would go through the IPS lcd display, then the display on since light go through the IPS display, the switching angle is related to the input power, the switch angle is related to the input power value of IPS LCD, the more switch angle, the more light would transmit the IPS LCD, we call it negative display mode.