Home » Products » TFT Displays » Industrial Displays » 4.0 Inch Round Display 720*720 Resolution LCD with MIPI Interface

4.0 Inch Round Display 720*720 Resolution LCD with MIPI Interface

4.0-inch Round TFT LCD Display

Model:
FN0400D002A
Size(inch):
4
Operation Temp(℃):
-20~70
Storage Temp(℃):
-30~80
Resolution:
720x720
Direction:
ALL
Interface:
MIPI
Brightness(cd/m²):
250
Touch Screen:
Customizable

Quantity:
Availability:





Inquiry Add to Basket Download

Round display custom display buy display screen

Features

Drawing

Specification

Add Ons

Application

详情页IPS工控

4.0 inch TFT display, 720x720, MIPI, Industrial LCD Screen, 250cd/m²

This 4.0 inch is developed with a standard 720x720 high-resolution IPS screen and MIPI interface. A 4-inch small-sized, round TFT display is perfect for applications requiring both compactness and a unique design aesthetic. This type of display is commonly used in automotive instrument clusters, medical devices, and smart home controls. Its circular shape offers a distinctive look while maintaining full functionality, making it ideal for interfaces that display key information like speedometers, health metrics, or control dials. With vibrant colors, sharp contrast, and wide viewing angles, this display ensures excellent readability from various perspectives, while its small size allows for seamless integration into space-constrained devices or dashboards.

Features

True Circular Round Display Design

This 4.0 inch round display features a true circular active area, enabling seamless integration into products that require a non-rectangular, visually balanced interface. The round form factor enhances UI aesthetics and supports intuitive, radial-style layouts.

High Resolution 720×720 LCD Panel

With a 720×720 resolution, this round display delivers sharp text, smooth graphics, and clear icon rendering. The square pixel layout is optimized for circular screens, minimizing distortion and maximizing effective display area.

MIPI Interface for Embedded Systems

The MIPI interface supports high-speed data transmission and efficient integration with modern embedded processors, making this round display suitable for compact and performance-oriented device designs.

Compact 4.0 Inch Size for Space-Efficient Designs

The 4.0 inch diagonal size strikes a balance between visibility and compactness, allowing the round display to fit into handheld devices, control units, and embedded systems with limited front-panel space.

Industrial-Grade LCD Reliability

Designed for professional and industrial use, this round display delivers stable performance for embedded devices that require long-term operation and consistent display output.

Drawing

Specifications

General Specifications

LCD size(inch):	4.0 (Diagonal)
Resolution:	720(H) × 720(V)
Pixel Pitch:	0.141(H)x0.141(V)
Active Area(mm):	101.52(H)×101.52(V)
Module Size(mm):	105.6(W)x109.87(H) × 2.08(D)
Display Mode(mm):	Normally Black, Transmissive
Interface:	MIPI
Pixel arrangement:	RGB-Vertical Stripe
View Direction:	ALL
Power Supply(V):	2.8
Power Consumption(W):	0.25(Typ.)
Weight(g):	41(Typ.)
Luminance(cd/m2):	250(Typ.)
Operating Temperature(°C):	-20~+70
Storage Temperature(°C):	-30~+80

Interface

Pin No.	Symbol	I/O	Description
1	LEDA	P	LED Anode.
2-3	LEDK	P	LED Cathode.
4	VCI	P	Power Supply 2.8V.
5	IOVCC	P	LCD I/O power supply 1.8V.
6	RESET	I	Reset pin
7	TE	I	Tearing effect 1.8V.
8	NC	-	NO connection.
9	GND	P	Ground.
10	D0P	I	MIPI DSI differential data pair(Data lane 0+)
11	D0N	I	MIPI DSI differential data pair(Data lane 0-)
12	GND	P	Ground.
13	D1P	I	MIPI DSI differential data pair(Data lane 1+)
14	D1N	I	MIPI DSI differential data pair(Data lane 1-)
15	GND	P	Ground.
16	CLKP	I	MIPI DSI differential clock pair.
17	CLKN	I	MIPI DSI differential clock pair.
18	GND	P	Ground.
19	D2P	I	MIPI DSI differential data pair(Data lane 2+)
20	D2N	I	MIPI DSI differential data pair(Data lane 2-)
21	GND	P	Ground.
22	D33P	I	MIPI DSI differential data pair(Data lane 3+)
23	D3N	I	MIPI DSI differential data pair(Data lane 3-)
24	GND	P	Ground.
25	TP_INT	I	Touch Interrupt, No Connection.
26	TP_SDA	I	Touch IIC Data signal, No Connection.
27	TP_SCL	I	Touch IIC Clock signal, No Connection.
28	TP_RESET	I	Touch Reset Signal, No Connection.
29	TP_VCL	P	Touch Power supply, No Connection.
30	NC	-	NO connection.

Electrical Characteristics

Parameter	Symbol:	Min.	Typ.	Max.	Unit
Forward Current Voltage	VF	8.4	9.3	9.9	V
Forward Current	IF	If	-	40	mA
Backlight Power Consumption	Wbl	-	0.124	-	W
LED Lifetime	-	30000	-	-	Hrs

Customization

● Custom Touchscreen Options

Touch Sensor

• Available Sizes: Up to 65"

• Structure Options: G+G, G+F+F, designed for industrial and automotive applications

• Touch Functions: Supports multi-touch, waterproof, glove touch, passive pen, gesture & palm rejection

• Operating Temperature:

Industrial Grade: –20°C ~ +70°C

Automotive Grade: –30°C ~ +85°

Touch Controller (IC)

• Touch tuning and firmware optimization provided by FANNAL (in-house FW design)
• Trusted IC partners: EETI, ILITEK, GOODiX, FocalTech, Cypress, Microchip(FANNAL's Design Partner)
• High Reliability: Excellent anti-interference and long-term stability
• EMC Design: Full electromagnetic compatibility engineering to meet EMI/RFI and industrial standards

Cover Lens

• Material Options:

Glass: 0.55mm–10.0mm
PMMA: 0.5mm–3.0mm
PC: 0.1mm–1.0mm
• Custom Design: CNC, Hot bending, 3D & 2.5D cover glass, ceramic printing, and PMMA integration
• Surface Treatments:
3A: AG / AR / AF
Anti-Microbial / Anti-Explosion

Custom Touchscreen

AD Board

We can provide complete accessories, including backlight board, AD Board and wire sets.

Applications

1. Automotive Instrument Clusters & Auxiliary Displays

Why it fits:
The round display format naturally matches traditional gauge designs, making it suitable for automotive instrument clusters, auxiliary dashboards, and control interfaces.

Typical use cases:

Digital gauges
Mode indicators
Secondary vehicle information displays

2. Medical Devices & Healthcare Equipment

Why it fits:
The 720×720 resolution enables clear visualization of medical parameters, while the round display layout supports intuitive control interfaces.

Typical use cases:

Portable medical devices
Medical control panels
Device status and parameter displays

3. Industrial Control Interfaces

Why it fits:
Round displays are well-suited for rotary-style UI designs commonly used in industrial control systems.

Typical use cases:

Equipment control knobs
Status indicators
Machine operation panels

4. Smart Home & IoT Control Panels

Why it fits:
The compact round display enables elegant UI designs for smart home devices and IoT controllers.

Typical use cases:

Smart thermostats
Home automation controllers
Embedded IoT interfaces

5. Consumer & Wearable-Style Embedded Devices

Why it fits:
The round display supports modern, minimalistic designs often seen in consumer electronics and smart devices.

Applications of round display

FAQ

1. What is a round display?

A round display is a circular LCD or OLED screen designed for applications that require a non-rectangular user interface, often used for dials, gauges, and modern UI designs.