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.
Main parameters of 3.97-inch tft display
| ITEM | Standard value | UNIT |
| LCD SIZE | 3.97 | INCH |
| LCD Type | TFT Negative Transmissive | — |
| Driver Element | a-Si TFT Active matrix | — |
| Number of Dots | 320*(RGB)*480 | Dots |
| Pixel Arrangement | RGB Vertical Stripe | — |
| Pixel Pitch (W*H) | 0.174*0.174 | mm |
| Active Area | 55.68*83.52 | mm |
| Viewing Direction | 12 clock | — |
| Control IC | ST7796s | — |
| Module Size(W*H*T) | 60.88(W)*94.57(H)*2.5±0.1(T) | mm |
| Back Light | White 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/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 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
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
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 | Symbol | detail |
| 1 | LEDK | Power supply Cathode input for backlight |
| 2 | LEDA | Power supply Anode input for backlight |
| 3 | GND | Ground |
| 4 | VCI | Power supplyto the internal Analog(2.65V-3.3V) |
| 5-12 | R0-R7 | Data bus for red |
| 13-20 | G0-G7 | Data bus for green |
| 21-28 | B0-B7 | Data bus for blue |
| 29 | GND | Ground |
| 30 | CLK | Dot clock signal for RGB interface operation |
| 31 | DISP/NC | Not connect |
| 32 | HSYNC | Line synchronizing signal for RGB interface operation |
| 33 | VSYNC | Frame synchronizing signal for RGB interface operatione |
| 34 | DE | ata enable signal for RGB interface operation |
| 35 | SDO | Serial data output pin used for the SPI Interface |
| 36 | GND | Ground |
| 37 | RESET | Reset signal pin |
| 38 | SDA | Serial data input pin in serial bus system interface |
| 39 | SCLK | SCL: Serial clock input for SPI interface. |
| 40 | CS | Chip select pin |
