Displays

Last updated: October 20, 2023

Overview

Standard version of 2024+ Model 3 is equipped with both front and rear touchscreen.

Center Touchscreen

The 2024+ Model 3 uses a 15.4" high definition touchscreen with a 1920x1200 resolution and a 60Hz refresh rate. The screen is capable of tracking 10 inputs via its Advanced In-cell Touch (AIT) embedded touch sensor. This in-cell touch technology integrates the touch sensor layer within the display panel itself, rather than having a separate layer for the touch sensors.

The center touchscreen serves as the main user interface for front seats aside from the steering wheel buttons, providing essential driver information such as vehicle speed, gear, and self-check alerts. The touchscreen also displays information related to cabin HVAC function, in-vehicle entertainment, maps and navigation, etc.

The touchscreen is external to the car computer, serviced as an entire assembly, and can be removed without accessing the car computer. It connects to the car computer via a HSD+2 and 8-pin connector.

Touchscreen

Rear Touchscreen

The 2024+ Model 3 is equipped with an 8" rear display that has a resolution of 1280x720. The display offers full touch as well as video streaming capabilities. This display acts as the control for the AirWave climate control in the second row. The display is connected to the car computer via a HSD+2 cable with the HSD portion carrying serialized data and the +2 portion providing power and ground for the display LED's and buck converter.

Rear Touchscreen

Touchscreen Communication

The touchscreen is connected to the car computer via two separate connections. One is a HSD+2 connector carrying display port on the four pins of the HSD and power/ground with the two (+2) additional wires. The second display cable is an 8-pin connector which carries I2C, display port auxiliary, and the touch interrupt line.

The I2C communication protocol is typically only used for on-board communication. As with larger communication distances the bus is more susceptible to electromagnetic interference, different ground potentials, and high power demands. In order to enable the long distance I2C communication (which connects the touchscreen's touch controller to the gateway) a pair of I2C to CAN physical transceivers are used. One in the Ryzen infotainment board and one in the touchscreen. These transceivers convert the single ended I2C lines into differential lines.

Touchscreen Communication

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