OverviewThe YX40018A is a 3.92-inch square TFT LCD display module with 320×320 RGB resolution. It supports selectable MCU 8080 or 4-wire SPI interface via IM0–IM2, enabling flexible integration in embedded platforms. Driven by the ST7796U IC and equipped with a 10‑LED white backlight, the module delivers stable image performance, All O'Clock viewing direction and a compact outline suited to industrial control, medical devices, POS terminals, handheld instruments and embedded HMI.
Basic specifications- Model: YX40018A
- Display size: 3.92 inch (square)
- LCD type: TFT, transmissive
- Resolution: 320 (RGB) × 320
- Active area: 71.14 × 69.82 mm
- Outline dimensions: 75.66 × 78.23 × 2.24 mm
- Pixel pitch: 0.222 × 0.222 mm
- Driver IC: ST7796U
- Interface: MCU 8080 / 4-wire SPI (selectable via IM0–IM2)
- Backlight: 10 white LEDs
- Analog operating voltage: 2.8 V (typ.)
- Contrast ratio: 800 : 1
- Brightness: 300 cd/m²
- Color gamut: 60%
- Luminance uniformity: 80%
- Response time: 25 ms