Square RGB 666 TTL TFT Display – 4″ 720×720 – No Touchscreen – TL040HDS20-B1502A

This is a screen for advanced hackers who like the look of a big rectangular TFT screen with tons of pixels. The 4″ display has 720×720 16-bit full-colour pixels and is an IPS display, so the colour looks great up to 80 degrees off-axis in any direction.

This version does not have a touchscreen. 

The TFT driver is ST7701S and uses both TTL RGB ‘dot clock’ data. Note that, unlike the other funky-shaped displays, this particular model does not require SPI pre-configuration. It pops up immediately into ‘RGB’ mode – which makes it a great panel to start with. However, note that despite having a 40-pin connector, it does not have the same pinout as standard ‘rectangular’ 800×480 (4.3″, 5″ or 7″) or 480×272 (4.3″) displays. It’s a new kind of beast for sure.

To make stuff light up you’ll need a chip that can perform TTL RGB TFT driving, which means a powerful microcontroller such as the ESP32-S3 with octal PSRAM or a computer like a

Raspberry Pi

(with either direct-DPI connection or an intermediary chip like the ICN6211). Either way, it’s not something you can wire up to your Feather or Arduino!

This is just the display module, no driver PCB is included!

You cannot use these with an everyday microcontroller unless it specifically has support for RGB-666 displays so please do not purchase unless you know for sure that it can plug into a driver board with the correct pinout as well.

Resources

• Display Init Code Listing

• Display Spec Sheet

• ST7701 Datasheet