Patent ID: 7091471

Claim:
A control system for a device comprising: an imager and eye detection processing for detecting light received by said imager from a human eye, said eye detection processing being configured to generate an output indicative of determinations of detecting said human eye; and a controller enabled to switch said device among a plurality of power consumption states in response to said output of said eye detection processing, said controller being configured to execute both of a first conditional response and a second conditional response, wherein (a) said first conditional response is one in which said device is switched from a power-up state to a lower power consumption state upon passage of a first time period without detecting a human eye; and (b) said second conditional response is one in which said device is switched to said power-up state upon detection of a human eye, said controller including a control algorithm which adaptively adjusts said first time period on a basis of factors that include historical data of occurrences of switching by said controller.