3.97-inch 320x480 tft display

The 3.97-inch 320×480 tft display module has a slender display ratio and high resolution and is especially suitable for small instruments and equipment that require display images. 

 > 3.97-inch 320×480 tft display, SPI interface TN mode
3.97-inch lcd display

Main parameters of 3.97-inch tft display

ITEMStandard valueUNIT
LCD TypeTFT Negative Transmissive
Driver Elementa-Si TFT Active matrix
Number of Dots320*(RGB)*480Dots
Pixel ArrangementRGB Vertical Stripe
Pixel Pitch (W*H)0.174*0.174mm
Active Area55.68*83.52mm
Viewing Direction12 clock
Control ICST7796s
Module Size(W*H*T)60.88(W)*94.57(H)*2.5±0.1(T)mm
Back LightWhite LED

Download relevant technical documents

ST7796 data sheet for small lcd display

Specification of 3.97-inch small lcd display

Circuit diagram for 3.97-inch small lcd display

FPC custom service

FPC/cable/interface customization

Customize the length, width and thickness of FPC or cable, adjust the pin arrangement according to the interface type, and select the appropriate connector. Make your display or circuit board simple and safe with an excellent FPC solution.

Touch display customization service

Touch screen or cover glass added

A touch screen can be added according to your requirements, there are three options: resistive touch screen, capacitive touch screen, infrared touch screen. Or add protective glass as needed

Optical Measuring Instruments

Customized Display Optical Parameters

Display screens with different optical parameters can be designed according to needs, such as brightness, color gamut, response time, gamma and other parameters, and anti-glare, anti-fingerprint coatings, etc. can also be added

HDMI to MIPI,RGB,LVDS adapter board

Customized HDMI to MIPI, RGB, LVDS boards

The circuit board we designed can convert the interface of your display into an HDMI interface. If your product does not have any display control capabilities, you can use our serial display and only need to use simple commands to control the displayed content through RS232/458

3.97-inch tft display drawings and interfaces

The 3.97-inch TFT display has a resolution of 320×480, using TN display mode, the best viewing angle is at 6 o’clock, and has a fast response time. The driver IC is ST7796, which supports SPI interface.

The backlight unit of the display adopts 8 LED lamps connected in parallel, the driving voltage is 3V, the driving current is 120mA, and the brightness of the display screen reaches 100cd/m².

We are constantly striving to innovate and aim to provide cutting-edge solutions for the TFT LCD industry. Our 3.97-inch TFT display reflects our commitment to quality and performance, balancing affordability, optimized viewing angles, advanced driver ICs, and efficient backlighting. Experience the future of display technology with our innovative solutions. 

The outline drawing is as follows:

Interfaces are defined as follows:

Pin Symboldetail
1 LEDKPower supply Cathode input for backlight
2LEDAPower supply Anode input for backlight
4VCIPower supplyto the internal Analog(2.65V-3.3V)
5-12R0-R7Data bus for red
13-20 G0-G7Data bus for green
21-28 B0-B7Data bus for blue
30CLKDot clock signal for RGB interface operation
31DISP/NCNot connect
32HSYNCLine synchronizing signal for RGB interface operation
33VSYNCFrame synchronizing signal for RGB interface operatione
34DEata enable signal for RGB interface operation
35SDOSerial data output pin used for the SPI Interface
37RESETReset signal pin
38SDASerial data input pin in serial bus system interface
39SCLKSCL: Serial clock input for SPI interface.
40CSChip select pin 

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