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· MPN: ADA5795

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This square 4 inch TFT panel gives advanced display projects a high-resolution 720x720 pixel canvas with 16-bit full colour. It is an IPS display, so the col...

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This square 4 inch TFT panel gives advanced display projects a high-resolution 720x720 pixel canvas with 16-bit full colour. It is an IPS display, so the colour remains strong up to 80 degrees off-axis in any direction.

This version does not include a touchscreen. The panel uses an ST7701S TFT driver with TTL RGB “dot clock” data, and unlike some other shaped displays it does not require SPI pre-configuration — it starts up directly in RGB mode.

This is just the display module, with no driver PCB included. You will need hardware that can drive TTL RGB TFT panels, such as an ESP32-S3 with octal PSRAM or a Raspberry Pi using direct DPI or an intermediary chip such as the ICN6211.

Despite the 40-pin connector, this panel does not share the same pinout as standard rectangular 800x480 or 480x272 TFT displays, so confirm your driver board and pinout before building it into a project.

Specifications:

  • Display size: 4"
  • Resolution: 720x720
  • Colour depth: 16-bit full-color pixels
  • Panel type: IPS display
  • Viewing angle: color looks great up to 80 degrees off-axis in any direction
  • Touchscreen: No touchscreen
  • TFT driver: ST7701S
  • Interface: TTL RGB 'dot clock' data
  • SPI pre-configuration: Does not require SPI pre-configuration
  • Connector: 40-pin connector
  • Driver PCB: No driver PCB is included
  • Compatible host requirement: A chip that can perform TTL RGB TFT driving
  • Example host: ESP32-S3 with octal PSRAM
  • Example computer: Raspberry Pi with either direct-DPI connection or an intermediary chip like the ICN6211
  • Technical detail: Display Init Code Listing
  • Technical detail: Display Spec Sheet
  • Technical detail: ST7701 Datasheet

Best suited to experienced makers working with RGB-666 display hardware, such as the Adafruit Qualia ESP32-S3 for TTL RGB-666 Display.

Jargon buster

Plain-language definitions for the technical terms used above.

Colour depth
Colour depth describes how many different colours a display can show. A 65K-colour display can show about 65,000 colours, which is useful for icons, graphs, and simple full-colour interfaces but is less detailed than modern phone or computer screens.
ESP32
ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
IPS
IPS is a type of LCD panel that keeps colours and contrast more consistent when viewed from an angle. This matters for small displays that may be mounted in a dashboard, handheld project, or enclosure where the viewer is not always looking straight on.
octal PSRAM
Octal PSRAM is external pseudo-static RAM that uses an eight-line data interface for higher bandwidth than simpler memory connections. It matters for display projects because large screens and animations can need more working memory than the microcontroller has built in.
PCB
A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
RGB
Short for red, green and blue, usually referring to an LED that can mix those three colours. It matters because controlling an RGB LED teaches how separate outputs combine to create different colours.
RGB-666
A parallel display colour interface that sends 6 bits each for red, green and blue, using many pins to stream pixel data to a screen. It matters because RGB-666 panels need a driver board with the right connector, timing signals, and software setup, rather than the simpler wiring used by small SPI displays.
SPI
A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
TFT
A thin-film transistor display is a common type of colour LCD used for graphics screens. Knowing a product is for TFTs helps you check that the driver board matches the display’s connector, resolution, backlight, and signalling method.

4in 720x720 TFT Display Spec Sheet

Datasheet · 1.2 MB · Click any page to view full size

Download PDF

ST7701 Datasheet

Datasheet · 5.2 MB · Click any page to view full size

Download PDF

Supplier page — adafruit.com

Supplier Description · 943.5 KB · Click any page to view full size

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