2.4 Inch TN normally white LCD Display Module-240x400

Display size: 2.4 inch

LCD type: TN / Normally White

Resolution: 240(RGB) × 400 pixels

Viewing direction: 6 o’clock

Interface: RGB (16-bit) + 3-wire SPI control

Outline size: ~37 × 68 × ~2 mm (varies by supplier)

Driver IC: often ST7796 / ILI9327 / similar depending on manufacturer

Backlight: White LED

Application: handheld devices, industrial controllers, portable instruments

The 3-wire SPI is usually used only for register configuration, while the 16-bit RGB interface handles the high-speed pixel data to the LCD controller.

1. Specifications

Display Size:

· 2.4-inch TFT LCD panel, suitable for compact embedded devices and handheld equipment.

LCD Type:

· TN (Twisted Nematic) / Normally White

· In the default state, the display appears white when no voltage is applied.

· TN technology offers fast response time and low cost, though the viewing angle is more limited than IPS displays.

Resolution:

· 240 (RGB) × 400 pixels

· Each pixel contains red, green, and blue sub-pixels, allowing full-color display.

· Suitable for displaying graphics, icons, and simple UI interfaces.

Viewing Direction:

· 6 o’clock viewing direction

· The display provides the best viewing quality when viewed from below the panel (bottom view).

· If viewed from the opposite direction, colors and contrast may degrade.

Interface:

· 16-bit RGB interface: Used to transmit pixel data from the host processor to the LCD for image display.

· 3-wire SPI interface: Used for configuration commands, register settings, and display control.

Module Outline Size:

· Approximately 37 mm × 68 mm × 2 mm

· Thin and compact module suitable for small electronic devices.

Driver IC:

· Common controllers include ST7796, ILI9327, or similar chips depending on the manufacturer.

· The driver IC manages display timing, pixel control, and communication with the host MCU/processor.

Backlight:

· White LED backlight

· Provides uniform illumination for the LCD panel and supports adjustable brightness.

2. Functions

The LCD module performs several key functions:

Graphic Display

· Displays images, icons, text, and graphical user interfaces.

Color Rendering

· Full RGB color display allows visualization of complex UI elements.

Communication with Host System

· Receives pixel data through the RGB interface.

· Receives configuration commands via SPI control interface.

Brightness and Display Control

· Backlight control enables brightness adjustment.

· Driver IC supports functions such as:

o Sleep mode

o Display on/off

o Gamma correction

o Orientation control

Real-Time Image Refresh

· High-speed RGB interface allows real-time screen updates for interactive systems.

3. Applications

This type of 2.4-inch TFT LCD module is widely used in compact electronic devices, such as:

Industrial Equipment

· Handheld diagnostic tools

· Industrial control panels

· Measurement instruments

Consumer Electronics

· Smart home control panels

· Portable media devices

· Handheld gaming devices

Medical Devices

· Portable monitoring devices

· Small medical instruments

IoT and Embedded Systems

· Microcontroller-based systems (Arduino, STM32, ESP32)

· Smart sensors and controllers

· Human-machine interface (HMI)

Portable Devices

· GPS devices

· Barcode scanners

· Data loggers

Summary:
This 2.4-inch TN TFT LCD module provides a compact, cost-effective color display solution with 240×400 resolution, RGB interface for high-speed data transmission, and SPI control for configuration, making it suitable for embedded systems, industrial equipment, and portable electronic devices.