4.0-Inch Round TFT LCD Module – 720×720 with 4-Lane MIPI Interface

This 4.0-inch round TFT LCD module features a 720×720 resolution, full 85° viewing angles, and a 4-lane MIPI DSI interface. It is designed for automotive displays, industrial HMIs, premium smartwatches, and high-end IoT applications requiring large circular displays with exceptional image quality. The anti-glare surface and ultra-slim 2.3mm profile make it an excellent choice for space-constrained products requiring a premium viewing experience.

Key Features

Premium Large Round Form Factor – 4.0-inch circular active area with 720×720 resolution for high-density automotive and HMI displays
Full Viewing Angles – 85°/85°/85°/85° viewing angles for consistent image quality from all directions
4-Lane MIPI DSI Interface – High-speed serial interface for seamless integration with modern application processors
Ultra-Slim Profile – 2.3mm module thickness for space-constrained designs
Wide Operating Temperature – -20°C to +70°C for demanding environments
Anti-Glare Surface – Reduces reflections for improved readability in various lighting conditions
Normally Black TFT – Excellent contrast and deep blacks for vivid imagery
FL7703 Driver IC – High-performance driver optimized for large circular TFT displays
30,000-Hour LED Backlight – Reliable long-life illumination for extended product lifespan
Separate Analog and Logic Power Supplies – VCI for analog (2.8V~3.3V) and IOVCC for logic (1.65V~3.3V) for flexible system integration

Technical Specifications

Parameter	Specification
Size	4.0-inch diagonal
Dot Matrix	720 x RGB x 720
Module Dimension	105.3 x 109.62 x 2.3 mm
Active Area	101.52 x 101.52 mm
Pixel Pitch	0.141 x 0.141 mm
LCD Type	TFT, Normally Black, Transmissive
Viewing Angle	85°/85°/85°/85° (Full)
Interface	4-Lane MIPI DSI
Driver IC	FL7703 or Equivalent
Backlight Type	LED, Normally White
Touch Panel	Without Touch Panel
Surface Treatment	Anti-Glare
Operating Temperature	-20°C to +70°C
Storage Temperature	-30°C to +80°C
Analog Supply Voltage (VCI)	2.8V ~ 3.3V (Typ. 3.0V)
Logic Supply Voltage (IOVCC)	1.65V ~ 3.3V (Typ. 1.8V)
VCI Current	35mA ~ 50mA (Typ. 35mA)
IOVCC Current	15mA ~ 20mA (Typ. 15mA)
LED Voltage (VLED+)	15.5V ~ 16.0V (Typ. 15.5V)
LED Current	40mA ~ 45mA (Typ. 40mA)
LED Life Time	30,000 Hours

Pin Interface

Pin	Symbol	Function
1	VLED+	LED Anode
2	VLED-	LED Cathode 1
3	VLED-	LED Cathode 2
4	VCI	Analog Power Supply (2.8V~3.3V)
5	IOVCC	I/O Power Supply (1.8V/3.3V)
6	RESET	Reset Signal (Active Low)
7	TE	Tearing Effect Output (1.8V)
8,25-30	NC	No Connection
9,12,15,18,21,24	GND	Ground
10	D0P	MIPI Data Lane 0 Positive
11	D0N	MIPI Data Lane 0 Negative
13	D1P	MIPI Data Lane 1 Positive
14	D1N	MIPI Data Lane 1 Negative
16	CLKP	MIPI Clock Positive
17	CLKN	MIPI Clock Negative
19	D2P	MIPI Data Lane 2 Positive
20	D2N	MIPI Data Lane 2 Negative
22	D3P	MIPI Data Lane 3 Positive
23	D3N	MIPI Data Lane 3 Negative

Applications

This round TFT LCD module is designed for premium automotive, industrial, and consumer applications where large circular displays with exceptional image quality are required:

Automotive Displays – Ideal for aftermarket circular displays, instrument clusters, and vehicle HMIs
Industrial HMIs – Large circular display ideal for control panels, machine interfaces, and operator terminals
Premium Smartwatches and Wearable Devices – The 4.0-inch size delivers an immersive, high-end smartwatch experience
Portable Medical Devices – High resolution and slim profile suit advanced health monitoring equipment
IoT Products – 4-Lane MIPI interface enables high-speed video output for premium IoT applications
Smart Home Appliances – Ideal for circular display panels on smart thermostats, control hubs, and appliances
Consumer Electronics – Perfect for high-end, compact display applications requiring fast image updates

Customization Options

We offer flexible customization to meet specific project requirements:

Touch Panel – Resistive or capacitive touch panel integration available upon request
Brightness – Backlight brightness can be customized for different environments
Interface – Alternative interface options available depending on requirements
FPC – Custom FPC length, connector type, and pinout available
Operating Temperature – Extended temperature range versions available for automotive and industrial applications
Surface Treatment – Optional surface treatments including anti-reflective or hard coating
LCM Assembly – Custom mechanical integration and housing solutions available
Optical Bonding – For improved durability and readability in outdoor/automotive applications

Selection Guide

When selecting this round TFT LCD module for your project, consider the following factors:

Display Resolution – 720×720 provides premium image quality suitable for high-density content like maps, navigation, and complex graphical interfaces
Interface Compatibility – 4-Lane MIPI DSI requires a host processor with MIPI DSI support; ensure your SoC has sufficient data lanes (up to 4 lanes)
Refresh Rate – MIPI interface enables high-speed frame updates ideal for animation, video, and interactive UI elements
Power Requirements – Separate VCI (2.8V~3.3V) and IOVCC (1.65V~3.3V) supplies for flexible system integration
LED Backlight – Requires 15.5V~16.0V at 40mA~45mA; ensure your backlight driver supports this voltage range
Operating Environment – Temperature range -20°C to +70°C suitable for consumer and industrial applications
Touch Integration – Touch panel not included, but available as a customization option
Mounting Space – Module dimension 105.3 x 109.62 mm with 2.3mm thickness; verify mechanical clearance in your design

Frequently Asked Questions

What is the viewing angle of this TFT display?

This display offers full 85°/85°/85°/85° viewing angles, providing excellent visibility from all directions.

Does this module include a touch panel?

This version does not include a touch panel. However, touch panel integration is available as a customization option. Please contact our sales team for details.

What interface does this display use?

The module uses a 4-Lane MIPI DSI interface with differential clock and data pairs, supporting high-speed video transmission for premium display applications.

What is the typical power consumption?

Typical current consumption is 35mA for VCI and 15mA for IOVCC during normal operation.

What is the LED backlight voltage requirement?

The LED backlight requires a voltage of 15.5V to 16.0V with a typical current of 40mA. The module features two LED cathode pins (VLED-).

What is the LED backlight lifetime?

The LED backlight has a typical operating life of 30,000 hours at 25°C.

Can you provide samples?

Yes, sample units are available for evaluation. Please submit your requirements through the sample request form.

Is driver support available?

Yes, we provide initialization code, datasheets, and technical support for integration. The FL7703 driver IC is well-supported with readily available driver libraries.