2.8 inch Display High Brightness ST7789 SPI

I. Product Introduction

The HTM-TFT028A16-SPI is a high-performance 2.8 inch Display LCD module launched by HOTHMI. It features a resolution of 240 × 3RGB × 320 dots, with overall dimensions of 88.00 (H) × 53.30 (V) × 7.70 (D) mm and an active display area of 43.20 (H) × 57.60 (V) mm. This 2.8 inch Display LCD module is built around the mature and stable ST7789 driver IC and operates at a typical driving voltage of 3.3V. For communication, it adopts an efficient and simple 4-wire SPI serial interface, equipped with an 8-pin module connector that includes VCC, GND, SDA, SCL, /CS, D/C, /RES, and a backlight on/off control pin (BL_E), allowing easy connection with various MPUs.

In terms of visual performance, it uses a transmissive and normally black display mode, supports full-viewing-angle technology with up to 80° visibility from all directions, and delivers a typical contrast ratio of 1200:1. The backlight system integrates 6 white LEDs in parallel, providing a high-brightness uniform display of up to 700 cd/m², with an LED lifespan of 20,000 to 30,000 hours. Additionally, this 2.8 inch Display features a wide operating temperature range, functioning stably in harsh environments from -30°C to 80°C (storage temperature from -30°C to 85°C), along with excellent ESD protection and outstanding shock and vibration resistance. It is ideally suited for diverse display applications such as smart instrumentation, industrial control, portable terminals, and embedded devices.

II. Core Technology Highlights

Designed specifically for demanding environments, this 2.8 inch Display module stands out from ordinary screens with four key technical advantages:

• True IPS full-viewing-angle technology: Traditional TN panels often suffer from severe color inversion and narrow viewing angles. This 2.8 inch Display LCD supports an ultra-wide 80° viewing angle in all directions, ensuring that images remain distortion-free, color-accurate, and uniformly bright regardless of the operator’s viewing angle. This fully meets the stringent visual requirements of industrial handheld devices and wall-mounted instruments viewed from multiple angles.
• Industrial-grade brightness of 700 cd/m²: The 2.8 inch Display LCD module’s backlight system is carefully configured with 6 high-performance white LEDs (arranged in 1 series and 6 parallel branches). While delivering a static contrast ratio of up to 1200:1, it achieves a typical display brightness of 700 cd/m². This means that even under strong indoor ambient light or high-intensity industrial lighting, on-screen information remains clearly visible.
• Ultra-wide operating temperature range: Ordinary LCD panels often suffer from blackening, severe response lag, or complete failure in sub-zero or high-temperature environments. This 2.8 inch Display LCD module has passed rigorous reliability tests and operates stably in extreme cold and heat from -30°C to +80°C (with storage temperature extended to -30°C to +85°C). It is an ideal choice for outdoor equipment in harsh northern winters or controllers in high-temperature southern factories.
• Enterprise-grade reliability and extended backlight life: The backlight system, when continuously operated at room temperature, has a working life of 20,000 to 30,000 hours (until brightness decays to 50%). Moreover, the product has passed packaging shock tests at 980 m/s², packaging vibration tests from 10 Hz to 50 Hz, and ESD tests of contact ±4 kV / air ±8 kV, ensuring rock-solid performance in industrial environments with frequent electromagnetic interference.

III. Pin Description

The HTM-TFT028A16-SPI 2.8 inch Display module adopts a clearly spaced and structurally standardized 8-pin interface design.

IV. Industry Application Scenarios

Because the HTM-TFT028A16-SPI 2.8 inch Display module perfectly combines high brightness, ultra-wide viewing angles, and wide-temperature tolerance, it finds extensive application across numerous vertical industrial and IoT sectors:

• Smart industrial instrumentation and control panels: In complex industrial environments with strong electromagnetic interference and variable temperatures, this 2.8-inch screen is commonly used as the display core for industrial PLC field terminals, portable gas detectors, multi-function power meters, boiler control panels, and digital sensors. Its tolerance from -30°C to 80°C effectively overcomes various extreme factory conditions.
• Medical and health monitoring equipment: In medical devices where reliability is paramount, this module serves as the interactive interface for portable oximeters, multi-parameter monitors, digital infusion pumps, and in-vehicle medical diagnostic devices. The high static contrast ratio (1200:1) ensures that medical data, waveforms, and warning icons are displayed with exceptional clarity, assisting healthcare professionals in accurate readings.
• Smart home and environmental monitoring control centers: As the display core for modern smart home wall-mounted panels, it is used in building intercom systems, smart thermostats, whole-house fresh air system control panels, and indoor PM2.5 air quality monitors. The full-viewing-angle technology guarantees that users standing at any position relative to the panel enjoy a consistent, color-accurate visual experience without chromatic aberration.
• Commercial IoT and smart retail terminals: Widely adopted in handheld POS scanners, smart parcel locker user interfaces, charging station information displays, and premium attendance access terminals. The high-brightness backlight (700 cd/m²) ensures that even when installed on semi-outdoor smart charging piles, users can easily perform scanning and payment operations without being bothered by glaring sunlight.

V. Technical Q&A

Q1: How do I connect this 2.8 inch Display screen? Does it require many pins?

A1: No, it does not require many pins – the wiring is very simple. This screen uses an efficient 4-wire SPI serial interface, and the entire module has only 8 pins. Apart from the power supply and ground, only 6 signal lines (SDA, SCL, /CS, D/C, /RES, BL_E) are actually needed for data transmission and screen control. This saves a significant number of main controller pins compared to traditional parallel interfaces with dozens of pins, making your PCB layout much easier.