The LT3965 matrix LED dimmer is used for matrix LED headlights. It is used to control the individual LED brightness for each LED within a string of LEDs. With computer I2C serial interface, patterns, fault diagnostics, and on/off or brightness control is possible. New automotive headlights that are more animated, robust and sophisticated are coming.
In the video below , Keith Szolusha discusses the LT3965 matrix LED dimmer.