The common rear lights for cars, whether they are made with common incandescent lamps or LEDs, are designed to have defined areas dedicated to the display of a state (STOP, Reverse, Direction, Position Lights), being designed with the use of elements illuminants capable of emitting only one type of color.
In this project prototypes were made using RGB multi-color LED lighting elements which, being able to vary their emission color, allow us to fully exploit the entire area of ​​the rear light available.
In practice, the LEDs positioned inside the headlight are controlled by a programmable control logic, in this case made with an ATMEGA328P, to turn on in a "changeable" way in relation to the type of command received from the car. The commands to be displayed are simulated by means of a switch control box.
The result is that the various areas of the rear light, no longer dedicated to a single type of signaling, can change their function based on the geometry programmed from time to time in the control logic.
The possibility to always use the maximum possible surface for the display of the driving directions of the car, is to be understood as an improvement of the overall safety of the car that, in this way, will show what is necessary with the maximum effectiveness and brightness possible.