• Size
• 4.0
• mm

• Resolution
• 720x720
• Dot

• Model No.
• TFT040B03

• Product Type
• IPS

• Shape of Display
• Square

• Outline Size
• 74.83x78.96x3.05
• mm

• Active Area
• 72.26x72.26
• mm

• View Angle
• All Angles

• Drive IC
• ST7701S

• Interface
• RGB

• Touch Screen
• NA

• OP
• -20°C~+70°C
• ℃

• Remark

4.0-Inch High-Resolution Square TFT LCD Module 720×720 with MIPI Interface

Detailed Introduction

This 4.0-inch square TFT LCD module delivers a high-resolution 720×720 display optimized for modern UI layouts, smart terminals, and applications requiring detailed icons, graphics, and circular interface elements. The square aspect ratio is engineered for devices that prioritize a balanced visual canvas, enabling precise rendering of user interface elements in both vertical and horizontal orientations. With its vivid RGB display and full-viewing-angle performance, this module ensures consistent clarity from any direction.

The mechanical structure features a wide active area of approximately 71.9×71.9 mm, providing a generous display space within a compact footprint. At a module width of about 78.98 mm and thickness near 3.1 mm, the design supports slim housings while maintaining rigidity through reinforced optical and backlight layers. The FPC tail includes an optimized grounding pattern and secure connector placement to ensure stable signal transmission even under continuous operation.

A high-performance MIPI interface supports fast refresh rates, enabling fluid animations and responsive UI transitions in embedded systems. Combined with a carefully designed LED backlight array, the display reaches an estimated brightness of 400 cd/m², providing strong readability indoors and acceptable visibility in semi-outdoor environments. The LED backlight operates at Vf≈12.4 V with series-parallel LED configuration, ensuring uniform illumination across the entire screen.

With an operating temperature range from –20°C to +70°C and storage tolerance down to –30°C, this module fits both consumer and industrial applications. Its robust construction, stable backlight, and high pixel density make it suitable for smart home panels, handheld terminals, medical data devices, and next-generation visual interfaces where compact size and high clarity are equally important.

Features

4.0-inch high-resolution square TFT module

720×720 pixel density for detailed UI graphics

Full viewing direction for consistent visibility

High-speed MIPI interface

Slim module thickness ideal for compact enclosures

Uniform LED backlight with strong luminance

Stable performance in wide temperature conditions

Reinforced FPC design for reliable integration

Applications

Smart home control screens

AI terminals and edge-computing devices

Handheld industrial instruments

Medical and diagnostic data monitors

Wearable or tabletop smart displays

Compact consumer electronics

Except the available standard LCD/TFT/OLED display products, Huaxianjing provides tailor made displays. The extensive portfolio makes it possible to create tailor-made solutions for customers to fit their application. We have the advanced display technologies available to use in your design and if there is anything you want to change about one of our existing LCD/TFT/OLED displays, we can make it happen.

With more than 15 years experience, our sales and engineering team will be with you through the entire development process and will ensure the semi or fully customization a successful display tailored made to the individual application.

Our LCD/TFT/OLED custom design solutions are available in different options according to customer requirements. Huaxianjing can offer various options on backlight type, pin and connector, cable, resistive touch screen (RTP) and projected capacitivetouch screen (CTP)  or anti-reflective or anti-glare coating, or custom cover lens, ZIF PPC or customized PCB board or a fully custom solution for your product application, as well as System Integrated Solution.