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 medical devices
• Compact gaming consoles
• 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:
   • RES: Connect to a GPIO pin for resetting the display.
   • DC: Connect to a GPIO pin to toggle between data and command modes.
   • CS: Connect to a GPIO pin to enable/disable the display module.
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: Configure the SPI clock speed to a maximum of 15MHz for reliable communication.
• Reset Sequence: Always perform a hardware reset (toggle the RES pin) during initialization.
• Backlight Control: Use PWM to adjust brightness and reduce power consumption in battery-powered applications.

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>

// 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 with a 135x240 resolution
  tft.init(135, 240);

  // Set rotation (0-3 for different orientations)
  tft.setRotation(1);

  // Fill the screen with a solid color
  tft.fillScreen(ST77XX_BLACK);

  // Display a message
  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 CS pin is set low during communication.
   • Check if the backlight (BLK) is powered.

2. Flickering or Unstable Display:

   • Reduce the SPI clock speed in your microcontroller code.
   • Ensure proper grounding and minimize noise in the circuit.

3. Incorrect Colors or Orientation:

   • Verify the initialization code and ensure the correct driver (ST7789) is used.
   • Adjust the rotation setting in the code (tft.setRotation()).

4. Display Not Responding After Reset:

   • Ensure the RES pin is toggled low for at least 10ms during initialization.

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

Q: Is the backlight brightness adjustable?
A: Yes, connect the BLK pin to a PWM-capable GPIO pin for brightness control.

Q: Can I use this display with Raspberry Pi?
A: Yes, the display is compatible with Raspberry Pi. Use the SPI interface and appropriate libraries (e.g., luma.lcd).

Q: What is the maximum SPI clock speed?
A: The recommended maximum SPI clock speed is 15MHz for stable operation.