3.9-Inch Bar-Type TFT LCD Module – 480×128 with RGB24 Interface

This 3.9-inch bar-type TFT LCD module features a 480×128 resolution with a wide viewing format, 6 o’clock viewing direction, and an RGB24-bit (SYNC mode) interface. It is designed for automotive instrument clusters, smart home control panels, audio equipment, and specialty bar-type HMI applications. The anti-glare surface and ultra-slim 3.05mm profile make it an excellent choice for space-constrained products requiring a premium viewing experience. The Normally White transmissive TFT offers excellent readability in various lighting conditions.

Key Features

Bar-Type Form Factor – 480×128 resolution optimized for automotive, smart home, and audio display applications
6 o’clock Viewing Direction – Optimized for dashboard and downward viewing applications
RGB24-bit Interface – SYNC mode interface for high-speed video data transfer
Ultra-Slim Profile – 3.05mm 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 White TFT – High brightness and excellent readability for dashboard applications
HX8278-A Driver IC – High-performance driver optimized for bar-type TFT displays
No Touch Panel – Cost-effective solution for applications not requiring touch interaction
Wide Aspect Ratio – Elongated format ideal for instrument clusters and control panels

Technical Specifications

Parameter	Specification
Size	3.9-inch diagonal (Bar Type)
Dot Matrix	480 x RGB x 128
Module Dimension	105.5 x 37.0 x 3.05 mm
Active Area	95.04 x 25.34 mm
Dot Pitch	0.066 (W) x 0.198 (H) mm
Aspect Ratio	Bar Type
LCD Type	TFT, Normally White, Transmissive
View Direction	6 o’clock
Gray Scale Inversion Direction	12 o’clock
Interface	RGB24-bit (SYNC mode)
Driver IC	HX8278-A 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
Supply Voltage (VCC)	3.0V ~ 3.6V (Typ. 3.3V)
Supply Current (ICC)	15mA ~ 25mA (Typ. 15mA)

Pin Interface

Pin	Symbol	Description
1	VLED-	LED Backlight Cathode
2	VLED+	LED Backlight Anode
3	GND	System Ground
4	VCC	Logic Power Supply
5-12	R0~R7	Red Data Bus
13-20	G0~G7	Green Data Bus
21-28	B0~B7	Blue Data Bus
29	GND	System Ground
30	DCLK	Pixel Clock
31	DISP	Display On/Off Control
32	HSYNC	Horizontal Sync Signal
33	VSYNC	Vertical Sync Signal
34-35	NC	No Connection (Optional DE)
36	GND	System Ground
37-40	NC	No Connection (Optional Touch)

Applications

This bar-type TFT LCD module is designed for a variety of consumer, automotive, and industrial applications where elongated displays are required:

Automotive Instrument Clusters – Ideal for dashboard displays, gauge clusters, and vehicle information panels
Smart Home Control Panels – Perfect for smart thermostats, home automation hubs, and control interfaces
Audio Equipment – Suitable for DJ mixers, audio interfaces, studio equipment, and musical instruments
Industrial Control Panels – Elongated HMI interfaces for machine controls and process monitoring
Retail Displays – Digital shelf labels, price tags, and promotional information displays
Smart Appliances – Display panels for washing machines, refrigerators, and other smart home appliances
Medical Equipment – Compact displays for portable diagnostic devices and monitoring equipment

Customization Options

We offer flexible customization to meet specific project requirements:

Touch Panel – Resistive touch panel integration available upon request (pins 37-40 reserved)
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 applications
Surface Treatment – Optional surface treatments including anti-glare or hard coating
LCM Assembly – Custom mechanical integration and housing solutions available

Selection Guide

When selecting this bar-type TFT LCD module for your project, consider the following factors:

Display Resolution – 480×128 provides wide format ideal for dashboard and control panel applications
Interface Compatibility – RGB24-bit SYNC mode requires 24 data lines plus sync signals; ensure your MCU/SoC supports parallel RGB output
Viewing Direction – 6 o’clock viewing direction optimized for dashboard and downward viewing applications
Refresh Rate – RGB interface enables high-speed frame updates ideal for animation and interactive UI elements
Power Requirements – VCC range 3.0V~3.6V with typical current 15mA
Operating Environment – Temperature range -20°C to +70°C suitable for automotive and industrial applications
Touch Integration – No touch panel included, but available as a customization option
Mounting Space – Module dimension 105.5 x 37.0 mm with 3.05mm thickness; verify mechanical clearance in your design

Frequently Asked Questions

What is the viewing direction of this TFT display?

This display has a 6 o’clock viewing direction, making it ideal for dashboard and downward viewing applications. The gray scale inversion direction is 12 o’clock.

Does this module include a touch panel?

No, this version does not include a touch panel. It is designed as a display-only module for applications not requiring touch interaction. Resistive touch integration is available as a customization option (pins 37-40 are reserved for touch).

What interface does this display use?

The module uses an RGB24-bit interface in SYNC mode with DCLK, HSYNC, and VSYNC signals. DE mode is also optional (pins 34-35 reserved).

What is the typical power consumption?

Typical current consumption is 15mA at 3.3V VCC during normal operation.

What type of LCD is this?

This is a Normally White transmissive TFT display, offering high brightness and excellent readability for dashboard applications.

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 HX8278-A driver IC is well-supported with readily available driver libraries.