REDUCING POWER USAGE IN A VIRTUAL VISOR

A virtual visor (10) in a vehicle includes a screen (14) with various regions that can alternate between being transparent and being opaque. A camera (22) captures an image of the driver's face. A processor (30) performs facial recognition or the like based on the captured images, and determines which region of the screen is transitioned from transparent to opaque to block out the sun (20) from shining directly into the driver's eyes while maintaining visibility through the remainder of the screen (14). Low power monitors (60-64) can be independently run on the vehicle, asynchronously with the algorithms and image processing that controls which region of the screen to be opaque. The monitors consume less power than operating the virtual visor continuously. Based on trigger conditions as detected by the monitors, the image processing and thus the alternating between opaque and transparent is ceased to save power until the trigger condition is no longer present.