Description
Unveiling the TFT 4-inch LCD Panel: A Window to Vivid Displays
Embark on a visual journey with the SHENZHEN TECHSTAR ELECTRONICS INCORPORATED CO., LTD TECHNOLOGY SF-TO400DX-8979A-CT TFT LCD display module, a marvel of technology. This transmissive color active matrix TFT (Thin Film Transistor) liquid crystal display boasts an amorphous silicon TFT as its switching device, ensuring remarkable clarity. Comprising a TFT LCD module, a sophisticated driver circuit, and an efficient backlight unit, this 4-inch display is designed for excellence.
The resolution of the 4-inch TFT LCD dazzles with 320 (RGB) X 320 dots, capable of rendering up to 262k vibrant colors. Supporting both MCU and SPI interfaces, the LCD panel operates seamlessly within a supply voltage (VCC) range of 2.7V to 3.6V, with the standard value being 3.3V.
Versatility meets durability as the SF-TO400DX-8979A-CT thrives in temperatures ranging from -20℃ to +70℃, while its storage temperatures extend from -30℃ to +80℃. Equipped with a PCAP capacitive touch screen, this LCD module proves its mettle in applications such as automation, GPS, medical equipment, industrial devices, security systems, white goods, smart home setups, IoT systems, car equipment, car dashboards, car audio, car clocks, car door display systems, water ionizers, and more. Elevate your user experience with a TFT display that delivers high-quality, colorful images in every scenario.
Product Information
| Product: | TFT 4″ Inch | Resolution: | 320X320 Pixels |
|---|---|---|---|
| Interface: | MCU SPI | Touch Screen: | With PCAP/CTP |
| Outline Dimension: | 84.0 x 84.0 x 3.37 mm | Viewing Direction: | All Viewing Angles, IPS |
| Pin Number: | 40 Pins | Connection: | Plugging |
| Surface Luminance: | 300 Cd/m2 | Supply Power: | 3.3 V |
| Current Consumption: | 20 mA | Operating Temp.: | -20℃ To +70℃ |
| Lifetime: | 40000 Hrs | Compliance: | REACH & RoHS Compliant |
4″ TFT LCD 320×320 Dots, Square TFT 4 inch LCD Drawing
Interface Pin Definition
| Pin No. | Symbol | Description | When not in use | |||
| 1 | LEDA | B/L positive pin | — | |||
| 2 | LEDK | B/L negative pin | — | |||
| 3 | LEDK | B/L negative pin | — | |||
| 4 | GND | Ground | — | |||
| 5 | VCI | Power supply(2.8-3.3V) | — | |||
| 6 | IOVCC | I/O power supply(1.8-3.3V) | — | |||
| 7 | TE | Tearing effect output | Open | |||
| 8 | CS | Chip selection pin. Low-active. | — | |||
| 9 | RS | Display data/command selection
DCX=’ 1’ : display data or parameter. DCX=’0’ : register index / command. |
— | |||
| 10 | WR/SCK | Write enable in MCU interface.
In SPI mode, this pin is sclk |
— | |||
| 11 | RD | Read enable | GND | |||
| 12 | SDI | SPI interface input/output pin. | — | |||
| 13 | SDO | SPI interface output pin. | — | |||
| 14 | GND | Ground | — | |||
| 15-30 | D0-D15 | Horizontal sync input | GND | |||
| 31 | RESET | This signal will reset the device and it must be applied to properly initialize the chip | — | |||
| 32 | IM2 | IM0=0 | IM2=0 | MCU 16 BIT | D[ 15:0] is used | — |
| IM0= 1 | IM2=0 | MCU 8 BIT | D[7:0] is used | |||
| 33 | IM0 | IM0= 1 | IM2= 1 | 4Line SPI | CS,RS,SCK.SDI | — |
| IM0=0 | IM2=Â 1 | Reserve | – | |||
| 34 | GND | Ground | — | |||
| 35 | TP_INT | TP Interrupt to the host | Open | |||
| 36 | TP_SDA | TP I2C data input and output | Open | |||
| 37 | TP_SCL | TP I2C clock input | Open | |||
| 38 | TP_RES | TP external reset, Low is active | Open | |||
| 39 | TP_VCI | TP power supply(2.8-3.3V) | Open | |||
| 40 | GND | Ground | — | |||
Backlight Electrical characteristics
| Item | Symbol | Min | Typical | Max. | Unit |
| LED module forward
Voltage |
VBÂ LEDB | 12-13.2 | V | ||
| LEDÂ module current | IB Â LEDB | 30 | 40 | 50 | mA |
| LCM Surface brightness
Luminanceâ–¼1 |
LBÂ SB | —– | 300 | —- | Cd/mP 2P |
| LCM Surface brightness
uniformâ–¼2 |
LBÂ Â DBBB | —- | 80 | —- | % |
LCD Electrical characteristics
| parameter | Symbol | Condition | Min | Typ | Max | Unit | ||
|
Viewing Angle |
Φ=3 O’clock |
θ |
Cr＞10 |
75 | 85 |
deg |
||
| Φ= 6 O’clock | 75 | 85 | ||||||
| Φ=9 O’clock | 75 | 85 | ||||||
| Φ=12 O’clock | 75 | 85 | ||||||
| Contrast ratio | Cr | θ=0
Φ=0 |
800 | 1000 | ||||
| Respone time | Tr+Tf | — | 25 | — | ms | |||
| NTSC | % | 55 | 60 | |||||
| CIE(x,y)    chromaticty | WHITE | X | θ=0
Φ=0 |
Typ
-0.03 |
0.294 | Typ  +0.03 | ||
| Y | 0.329 | |||||||
| Â | ||||||||
4″ TFT LCD 320×320 Dots, Square TFT 4 inch LCD Product ImageÂ
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