Patent ID: 8436804
Filing Date: 2013-05-07
Classification: G06F,G09G,H04N,Y02D

Abstract:
1. A method of saving power for a digital photo frame, the method comprising: computing a first idle time of the digital photo frame according to a user trigger signal and determining whether the first idle time is greater than a first default value; switching on a passive infrared sensor when the first idle time is greater than the first default value, wherein the passive infrared sensor detects whether a user exists within a specific range by detecting changes in infrared radiation occurring when there is movement by the user whose temperature is different from surroundings of the digital photo frame, to generate a user detection signal; computing a second idle time of the digital photo frame according to the user detection signal indicating that the user is not within the specific range or the user trigger signal and determining whether the second idle time is greater than a second default value; switching off a backlight of a display panel on the digital photo frame when the second idle time is greater than the second default value; computing a third idle time of the digital photo frame according to the user detection signal indicating that the user is not within the specific range or the user trigger signal and determining whether the third idle time is greater than a third default value; and switching off a system power of the digital photo frame when the third idle time is greater than the third default value.