4 inch Display IPS 480×800 ILI9806 MCU

Product Introduction

TFT-H040B25WVIIL5N50 is a high-performance 4.0-inch TFT LCD display module, featuring a screen resolution of 480(RGB)×800 pixels. It adopts advanced transmissive, normally black panel technology, delivering rich and vivid color reproduction. This module is powered by the ILI9806 driver chip and offers Display IPS visual characteristics, ensuring clear and distortion-free viewing from all angles.

In terms of hardware interface and electrical specifications, it uses an 80-system bus interface (supporting 8-bit/16-bit bus modes), operates at a supply voltage of 2.8V to 3.3V, and integrates an efficient backlight system with driving conditions of Vf=24.0 to 27.0V and If=20mA, which stably provides a typical luminance of 500 cd/m². Moreover, this product boasts industrial-grade durability, with a TFT operating temperature range of -20℃ to +70℃ and a storage temperature range of -30℃ to +80℃, making it perfectly adaptable to various harsh environments. It is an ideal display solution for smart homes, industrial instruments, and portable devices.

Core Highlights

• Industry-Leading Display IPS Level Full-Viewing Experience：This module employs advanced normally black transmissive LCD panel technology. In terms of viewing angle performance, it achieves 85 degrees in all directions (up, down, left, and right), ensuring that operators can enjoy excellent color saturation and contrast from any observation angle, completely eliminating the color distortion and grayscale inversion issues common in traditional TN panels.
• High Dynamic Color and Exquisite Picture Quality：Within an active display area of 51.84mm × 86.40mm, this Display IPS screen packs an ultra-high pixel density of 480(RGB) × 800 dots. It supports a wide color gamut of 16.7M colors, faithfully reproducing detailed industrial charts, high-definition gradient HMI interfaces, and complex dynamic images, making operations and visual perception more vivid and precise.
• High-Brightness Backlight, Unafraid of Lighting Challenges：The module is equipped with a high-efficiency white LED backlight system. Under fixed current test conditions, the backlight driving voltage is Vf = 24.0V ~ 27.0V, and the standard driving current is If = 20 mA. This results in a typical LCD module brightness of up to 500 cd/m², placing it in the medium-to-high brightness range. It ensures clear readability under bright indoor lighting while also meeting the low-power consumption requirements of portable devices.
• Industrial-Grade Full Temperature Range and High Reliability：Designed for harsh operating environments, this module features a TFT operating temperature span from -20℃ to 70℃, and a storage temperature range from -30℃ to 80℃. Whether used in cold outdoor inspection devices in the north or in high-temperature industrial plant control panels in the south, it maintains stable 24/7 operation. Additionally, the ILI9806 driver chip is well-known in the industry for its strong anti-interference performance and excellent ESD protection circuit design.

50-Pin Core Pin Description and Interface Description

To accommodate diverse processor architectures, this Display IPS module adopts a 50-Pin flexible printed circuit gold finger interface, supporting flexible 80-system 8-bit/16-bit parallel bus (MCU interface) modes.

Interface Mode：

50-Pin：

Typical Application Scenarios

Thanks to its excellent Display IPS level viewing angle characteristics, high brightness of 500 cd/m², and robust industrial protection features, the TFT-H040B25WVIIL5N50 is widely used in the following vertical industries:

• Smart Home Control Panels: Perfectly embedded into 86-type wall terminals, the full viewing angle ensures that family members can clearly see weather and lighting control status from any standing position.
• Industrial Automation HMI: As the display core for equipment control cabinets and PLC expansion screens, it works with STM32, C8051, or Arduino series main controllers to enable real-time, high-precision monitoring of industrial parameters.
• Medical Monitoring and Portable Instruments: The normally black panel’s high contrast and anti-glare properties make it ideal for medical devices requiring extremely accurate data reading, such as pulse oximeters and portable ECG machines.
• Intelligent Handheld Inspection Terminals: The 500 cd/m² brightness performs excellently in semi-outdoor environments and in locations with alternating low and high light, such as greenhouses and warehouses, while the multi-lane parallel bus ensures fast and smooth data refresh without lag.

Display IPS Technology Q&A

Q1: What is the technical relationship and difference between this normally black panel and the commonly referred to Display IPS screens?

A: Display IPS is a highly representative liquid crystal alignment method among wide-viewing-angle panels. The term “normally black” mentioned in this product specification refers to its optical display mode – meaning that when the LCD panel is not powered, the backlight is completely blocked by the polarizers, resulting in a pure black screen. IPS panels are inherently normally black by their physical characteristics. Through the normally black process combined with precision alignment film design, this module achieves a full viewing angle of U85/D85/R85/L85, offering color performance and viewing angles almost identical to standard Display IPS screens.

Q2: Can the ILI9806 driver chip, driving this 480×800 screen via the 80-system bus, meet dynamic UI speed requirements?

A: Absolutely. The ILI9806 is a classic, highly integrated parallel driver chip with large-capacity GRAM. This module supports the 16-bit 8080 parallel bus mode, meaning that the host MCU can send 16 bits of RGB color data in a single write clock cycle. Compared to single-line or four-line SPI serial interface screens, the parallel bus offers several times higher throughput. When driven by industrial-grade MCUs with common main frequencies of 120MHz to 200MHz (such as STM32F4/F7/H7 series), it can easily achieve smooth dynamic UI refresh rates of over 30fps, which is more than sufficient for general industrial animations, curve plotting, and menu transitions.