Abstract: There is provided a state changing device. For example, in some examples, there is a portable computing device including a first digital image sensor facing out from a first side of the portable computing device, a second digital image sensor facing out from a second side of the portable computing device, and state change circuitry coupled to the first digital image sensor and the second digital image sensor, the state change detection circuitry designed to receive a first image from the first digital image sensor, receive a second image from the second digital image sensor, and change a state of the portable computing device or an application running on it if the first image is a blank image and the second image is not a blank image.

Abstract: The disclosure is directed to a system and method for selectively controlling display power consumption in a system with a first and second display. While the system is in a non-idle state and while an application that is actively executing has an active window on the first display, a determination is made that the second display is inactive. In response to the determination, and while the system is still in the non-idle state, the second display is switched from a full power state to a low power state.