TFT LCD display module YX40004A

color480 x 4803.95"

Overview
The YX40004A is a 3.95-inch square TFT LCD display module with 480×480 RGB resolution and a combined 3-wire SPI initialization plus 18-bit RGB interface. Equipped with the ST7701S driver IC, the module offers accurate color reproduction, fast response and an All O'Clock viewing angle for consistent visibility. It supports high-speed display update while simplifying integration with embedded controllers and industrial platforms. Typical applications include industrial control panels, embedded HMIs, smart appliances, POS terminals and medical device displays.

Mechanical Drawing
Mechanical drawing for the YX40004A module is available (outline and detailed dimensions provided).

Basic Specifications
Display Size: 3.95 inch
LCD Type: TFT-LCD, Positive Transmissive
Resolution: 480 (RGB) × 480
Active Area: 71.86 × 70.10 mm
Outline Dimensions: 74.83 × 78.98 × 2.18 mm
Pixel Pitch: 0.145 × 0.145 mm
Viewing Direction: All O'Clock
Driver IC: ST7701S
Interface: 3SPI + 18-bit RGB
Backlight: White LED × 8
LCM Input Voltage: 2.8 ±0.1 V

Optical Characteristics
Resolution: 480 × 480
Contrast Ratio: 600 : 1
Color Gamut: 50%
Brightness: 300 cd/m²
Luminance Uniformity: 80%
Viewing Angle (CR ≥ 10): 80° / 80° / 80° / 80°
Response Time: 17.5 ms

Operating Conditions
Operating Temperature: -20°C ~ +70°C
Storage Temperature: -30°C ~ +80°C
Humidity: ≤90% RH (60°C)

Characteristics / Technical specifications

• Model: YX40004A
• Display size: 3.95 inch square
• Resolution: 480×480 (RGB)
• Driver IC: ST7701S
• Interface: 3-wire SPI initialization + 18-bit RGB data transmission
• Viewing direction: All O'Clock
• Active area: 71.86 × 70.10 mm
• Outline dimensions: 74.83 × 78.98 × 2.18 mm
• Backlight: 8 × white LEDs
• Typical brightness: 300 cd/m²
• Contrast ratio: 600:1
• Operating temp range: -20°C to +70°C
• Storage temp range: -30°C to +80°C
• LCM input voltage: 2.8 ±0.1 V