Description
I. Product Detailed Introduction
This model HTM-H035A31-SPI-V04 3.5-inch TFT Display SPI LCD module adopts the advanced ILI9488 driver chip and delivers a classic resolution of 320(RGB) x 480 pixels, reproducing rich colours with NTSC 69% colour gamut coverage. The TFT Display SPI module features Normally Black IPS full-viewing-angle technology and a typical brightness of 400 cd/m², maintaining excellent clarity and readability even under changing outdoor light conditions. The module integrates a 4-wire SPI serial interface, a resistive touch control bus, and an SD card slot (SD-CS), effectively saving MCU I/O pin resources and greatly facilitating graphical interface interaction and experimental expansion.
In terms of hardware, the compact design measures 57.20mm x 95.80mm for the PCB, with a thickness of only 4.20mm, supports a wide input voltage from 3.0V to 5.0V, and operates stably in temperatures ranging from -20℃ to +70℃. With its industrial-grade quality, full-view colour performance, and convenient SPI communication, this TFT Display SPI module is widely used in embedded system development with C8051, Arduino, STM32, smart home dashboards, industrial control terminals, and portable handheld devices.
II. Core Product Highlights
To help your product stand out in the market, this 3.5-inch TFT Display SPI module offers the following four disruptive advantages:
- Minimalist Serial Bus, Free Up I/O Resources: Traditional 3.5-inch parallel display modules typically require 16-bit or 8-bit data lines plus control signals, occupying over 20 GPIOs. This TFT Display SPI module uses an efficient SPI 4-wire serial interface for display communication, completing full-colour screen updates with just a few pins, leaving precious MCU pins for sensors, communication modules, or other core peripherals.
- IPS Full-Angle View, Eliminate Blind Spots: Ordinary TN panels suffer from obvious colour distortion when viewed at an angle. This TFT Display SPI module is upgraded to high-end IPS hard-screen technology, providing an ultra-wide 178-degree viewing angle in both horizontal and vertical directions, ensuring that operators get consistent and accurate visual information regardless of the device’s mounting angle.
- Wide Voltage and High Compatibility, No Level Shifting Needed: Built-in precision level-matching and power management circuits allow direct connection with classic 5V Arduino UNO/Mega2560 boards as well as 3.3V high-frequency STM32, ESP32, Raspberry Pi Pico, and C8051 devices, eliminating the need for external level-shifter chips and simplifying circuit design.
- Triple-in-One High Integration, Maximum Space Saving: The three functions of TFT display, touch control, and SD card storage are perfectly integrated onto a PCB the size of a business card. Standardised pin-header design makes prototyping as easy as building blocks, drastically shortening the R&D cycle from concept to mass production.
III. Pin Description
IV. Typical Application Scenarios
With high-precision colour quality, excellent environmental adaptability, and easy development features, this TFT Display SPI module is widely used in the following cutting-edge fields:
- Smart Home and IoT Terminals: In smart home ecosystems, this TFT Display SPI module can be perfectly embedded into wall-mounted smart switch panels, central air-conditioning thermostats, home energy storage battery monitors, and air quality detectors. Its IPS full-viewing-angle capability ensures that family members can clearly see dynamic weather and device status from any passing angle.
- Industrial Control and Automation Instrumentation: Industrial environments are harsh with variable lighting. With a -20℃~+70℃ operating temperature range and 400 cd/m² brightness, this TFT Display SPI module is ideally suited for CNC machine control panels, PLC HMI extensions, power monitoring instruments, and automated production line status displays. Its Normally Black panel also effectively suppresses backlight bleeding, giving industrial UIs a more premium look.
- Medical Electronics and Portable Handheld Devices: The compact form factor (only 4.20mm thick) and low power consumption make it an ideal choice for portable multi-function instruments, such as handheld infrared thermometers, portable oscilloscopes, OBD diagnostic tools, and pulse oximeters. The resistive touch screen allows medical staff or workers to operate accurately while wearing gloves.
V. Technical Q&A
Q1: What are the unique advantages of the Normally Black IPS panel used in this module? How does it differ from ordinary normally-white screens?
A1:Display Principle Difference: Normally-white screens are light-transmissive (appearing white) when powered off, while normally-black screens completely block the backlight (appearing pure black) when powered off or when no pixel signal is present.
Core Advantages:
- Extremely High Contrast: The black performance of normally-black panels is exceptionally pure, eliminating the annoying “greyish backlight bleeding” phenomenon and delivering more stunning image quality.
- Lower Power Consumption: When displaying dark-themed UIs or night modes, the normally-black panel, due to its inherent molecular characteristics, provides a softer visual experience and saves energy.
- No Visual Dead Zones: Combined with IPS technology, it overcomes the common issues of TN screens, such as whitening and colour distortion when viewed from the side.
From minor concept tweaks to full custom redesign & development, our engineering team offers end-to-end technical support. Feel free to contact us for custom display demands or technical issues during product selection.
