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3.97″ Industrial TFT LCD Display Module 480×800 RGB/SPI

Name: 3.97″ Industrial TFT LCD Display Module 480×800 RGB/SPI
Brand: FANNAL
Rating: 5.0 (64 reviews)

3.97-inch Industrial TFT LCD

Model:
FN0397D002A
Brand:
FANNAL
Size(inch):
3.97
Display AA(mm):
51.84(H) × 86.4(V)
Operation Temp(℃):
-20~70
Storage Temp(℃):
-30~80
Resolution:
480x800
Direction:
85/85/85/85
Display Interface:
RGB/SPI
Brightness(cd/m²):
300

Quantity:
Availability:





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3.97inch Industrial TFT Industrial TFT LCD

Features

Drawing & Specifications

Applications

Customizations

FAQ

Key Features – 3.97″ Industrial TFT LCD

Industrial-Grade IPS TFT Panel — Wide viewing angle 85/85/85/85 ensures consistent color and contrast from all directions.
Resolution & Size — 480×800 pixels on a compact 3.97″ diagonal active area (51.84 × 86.4 mm) for sharp UIs and visual elements.
Robust Brightness — 300 cd/m² luminance supports good legibility in indoor and semi-outdoor environments.
Flexible Interfaces — Standard RGB and SPI interfaces enable easy integration with microcontrollers, SoCs, and embedded systems.
Wide Operating Temperatures — Designed for industrial conditions: –20°C to +70°C (operating) and –30°C to +80°C (storage).
Slim & Compact Design — Minimal thickness (~2.15 mm) for space-constrained products.
Optional Add-Ons — Compatible with capacitive touch panels (CTP), AD Boards, backlight modules, and wiring harnesses for turnkey integration.

Drawing

Specifications

General Specifications

Parameter	Specification	Unit
LCD size	3.97 (Diagonal)	inch
Resolution Ratio	480(H) × 800(V)	pixels
Pixel Pitch	0.108(H) × 0.108(V)	mm
Active Area	51.84(H) × 86.4(V)	mm
Module Size	57.14(W) × 96.85(H) × 2.15(D)	mm
Display Mode	Normally Black, Transmissive	-
Interface	RGB / SPI	-
Pixel arrangement	RGB-Vertical Stripe	-
View Direction	ALL	O'clock
Power Supply	2.8	V
Power Consumption	TBD	W
Weight	TBD	g
Luminance	300(Typ.)	cd/m²
Driver IC	ST7701SN	-
Operating Temperature	-20 ~ +70	℃
Storage Temperature	-30 ~ +80	℃

Pin Definition

Pin No.	Symbol	I/O	Description
1	LEDA	P	LED Power Anode.
2-3	LEDK	P	LED Power Cathode.
4	GND	P	Power Ground
5	VDD	P	Power supply 2.8V.
6	RESET	I	Global reset. Active low, Internal pull high.
7-8	NC	-	No connection
9	SDA	I/O	Serial communication data input.
10	SCK	I	Serial communication clock input.
11	CS	I	Serial communication chip selection.
12	PCLK	I	Clock input pin.
13	DE	I	Data enable signal input.
14	VSYNC	I	Vertical sync input.
15	HSYNC	I	Horizontal sync input.
16-33	DB0-DB17	I	DB0-DB5:Blue data, DB6-DB11:Green data, DB12-DB17:Red data.
34	GND	P	Power Ground
35-39	NC	-	No connection
40	GND	P	Power Ground

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit
Digital supply voltage	VDD	2.5	2.8	3.6	V
Interface Operation Voltage	VDDI	1.65	1.8	3.3	V
Level input voltage	VIH	0.7VDDI	-	VDDI	V
Level input voltage	VIL	GND	-	0.3VDDI	V
Level output voltage	VOH	0.8VDDI	-	VDDI	V
Level output voltage	VOL	GND	-	0.2VDDI	V

Backlight Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit
Forward Current Voltage	VF	21.6	24.0	26.4	V
Forward Current	If	-	20	-	mA
Backlight Power Consumption	Wbl	-	0.48	-	W
LED Lifetime	-	30000	-	-	Hrs

Industrial & Commercial Use Cases

This 3.97″ industrial TFT display is ideal for compact embedded visual interfaces across multiple sectors:

Industrial Controls & HMI Screens
Small machinery control panels and HMI displays in factory automation and equipment dashboards.
Portable Instruments & Handheld Devices
Field testers, measurement instruments, industrial handheld units requiring clear graphic UI.
Medical & Laboratory Equipment
Small diagnostic displays, settings panels, equipment status feedback screens.
Consumer-Edge Commercial Products
Access terminals, compact POS controllers, vending machine UIs, smart appliances.
Automotive / Transportation Interfaces
Cluster sub-displays, secondary information displays in vehicles, fleet devices (where RGB/SPI is supported).
Embedded Systems & Prototyping Platforms
Rapid prototyping with microcontrollers (MCU) and SBC platforms supporting parallel or serial interfaces.

Automotive Display

Kiosk touch screen

Railway display

E-bike display

Outdoor display

Industrial display

Medical touch screen

Gym-screen

Engineering Plant

Motorcycle display

Vending Machine Display

Embedded display

Customizations

● Custom Display Options

LCD Panel

• Size range: 1.77" to 15.6"
• Trusted panel partners: BOE, INNOLUX, JDI, Hannstar, CTC, TCL, and TIANMA.
• Panel types: IPS / TN / LTPS
• Operation Temperature: Industrial (-20 ~ 70°C), Automotive (-30 ~ 85°C)

Interface Design

• Tailored shape, length, and PIN definitions for full compatibility.
• EMI shielding and circuit optimisation.
• Supports multiple conversions: SPI, MCU, RGB, MIPI, LVDS, EDP

Back Light

• Module material options: metal/plastic/metal–plastic integration
• High brightness up to 30,000 cd/m², ideal for outdoor or industrial use.
• Long lifetime up to 50,000 hours.

Driver Board

• Options: RGB / VGA / HDMI / LVDS / DVI / Type-C
• Fully compatible with custom TFT and LCD modules.

• Optimised design for stable image transmission and performance.

● 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 Optical Bonding Service

Optical Bonding	Size Range	Notes
OCA	Up to 15.6”	Two fully automated production lines for high-volume manufacturing
LOCA / OCR	Up to 32”	Excellent for high contrast and durability
Silicone	Up to 32”	Ideal for rugged, large-size industrial applications

FAQ

Q1: What are the benefits of the ST7701SN driver IC for this 3.97" display?

Answer: The ST7701SN is a highly integrated driver IC that supports high-resolution displays with excellent color stability. It allows the module to handle complex UI graphics smoothly while maintaining low power consumption, which is critical for handheld industrial devices.

Q2: Can I use both RGB and SPI interfaces for this LCD module?

Answer: Yes. This display supports both RGB and SPI interfaces, offering great flexibility for engineers. You can use SPI for simple command initialization and RGB for high-speed video data transmission, depending on your controller's capabilities.

Q3: Is this 3.97-inch screen readable from all angles?

Answer: Yes, it features a "Normally Black" transmissive display mode with an "ALL" view direction. This ensures no grayscale inversion or color is shifting, providing clear visibility even when viewed from sharp angles.

Q4: Can this display withstand harsh industrial temperatures?

Answer: Absolutely. It is designed for industrial reliability with an operating temperature range of -20°C to +70°C and can be stored in environments ranging from -30°C to +80°C.

Q5: Does Fannal provide a matching touch panel for this 3.97-inch LCD?

Answer: Yes, we can provide a customized Projected Capacitive (PCAP) or Resistive touch panel, along with optical bonding services, to create a fully integrated touch-display assembly for your project.