How to Use 1.14 Inch IPS TFT LCD Display 135x240: Examples, Pinouts, and Specs

The 1.14 Inch IPS TFT LCD Display by Estardyn is a compact and vibrant display module designed for embedded systems. Featuring IPS (In-Plane Switching) technology, it offers wide viewing angles and excellent color reproduction. With a resolution of 135x240 pixels, this display is ideal for applications requiring clear and detailed visuals in a small form factor.

• Wearable devices (e.g., smartwatches, fitness trackers)
• IoT dashboards and control panels
• Portable gaming devices
• Industrial equipment displays
• DIY electronics projects with microcontrollers (e.g., Arduino, Raspberry Pi)

Below are the key technical details of the 1.14 Inch IPS TFT LCD Display:

The display module has an 8-pin interface. Below is the pinout and description:

1. Power Supply: Connect the VCC pin to a 3.3V power source and the GND pin to ground.
2. SPI Communication: Connect the SCL (clock) and SDA (data) pins to the corresponding SPI pins on your microcontroller.
3. Control Pins:
   • Connect the RES pin to a GPIO pin on your microcontroller for resetting the display.
   • Use the DC pin to toggle between data and command modes.
   • Connect the CS pin to a GPIO pin to enable or disable the display.
4. Backlight: Connect the BLK pin to 3.3V for constant backlight or to a PWM-capable GPIO pin for brightness control.

• Voltage Levels: Ensure all signal lines operate at 3.3V logic levels. Use a level shifter if your microcontroller operates at 5V.
• SPI Speed: The display supports SPI clock speeds up to 15MHz. Use lower speeds if you encounter communication issues.
• Reset Sequence: Always initialize the display with a reset sequence to ensure proper operation.
• Backlight Control: Use PWM to adjust the brightness of the backlight for power efficiency and user comfort.

Below is an example of how to interface the display with an Arduino UNO using the Adafruit_GFX and Adafruit_ST7789 libraries:

#include <Adafruit_GFX.h>      // Core graphics library
#include <Adafruit_ST7789.h>  // ST7789 driver library
#include <SPI.h>              // SPI library

// Define pin connections
#define TFT_CS    10  // Chip Select pin
#define TFT_RST   9   // Reset pin
#define TFT_DC    8   // Data/Command pin

// Initialize the display object
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(9600);
  Serial.println("Initializing display...");

  // Initialize the display
  tft.init(135, 240);  // Initialize with width=135 and height=240
  tft.setRotation(1);  // Set display orientation (0-3)

  // Fill the screen with a solid color
  tft.fillScreen(ST77XX_BLACK);
  tft.setTextColor(ST77XX_WHITE);
  tft.setTextSize(2);
  tft.setCursor(10, 10);
  tft.println("Hello, World!");
}

void loop() {
  // Add your main code here
}

• Install the Adafruit_GFX and Adafruit_ST7789 libraries via the Arduino Library Manager before running the code.
• Ensure the SPI pins on the Arduino UNO (MOSI, SCK) are correctly connected to the display.

1. No Display Output:

   • Verify all connections, especially power (VCC and GND) and SPI lines (SCL, SDA).
   • Ensure the display is properly initialized in your code.
   • Check if the backlight (BLK) is connected to 3.3V or a PWM signal.

2. Flickering or Distorted Image:

   • Reduce the SPI clock speed in your code.
   • Ensure proper grounding between the display and the microcontroller.

3. Display Stays Blank:

   • Confirm that the RES pin is toggled during initialization.
   • Check if the CS pin is correctly set to LOW during communication.

4. Incorrect Colors or Orientation:

   • Verify the color format (16-bit RGB) and rotation settings in your code.
   • Ensure the driver IC (ST7789) is correctly configured.

Q: Can this display work with 5V microcontrollers like Arduino UNO?
A: Yes, but you must use a level shifter to convert 5V logic signals to 3.3V to avoid damaging the display.

Q: How do I control the brightness of the backlight?
A: Connect the BLK pin to a PWM-capable GPIO pin on your microcontroller and adjust the duty cycle to control brightness.

Q: Can I use this display with Raspberry Pi?
A: Yes, the display is compatible with Raspberry Pi. Use the SPI interface and configure the ST7789 driver in your Raspberry Pi setup.

Q: What is the maximum SPI clock speed supported?
A: The display supports SPI clock speeds up to 15MHz. Use lower speeds if you encounter communication issues.