Back to results
US 10,372,189 B2Granted
Power-saving method and device
AssigneeWistron Corporation
InventorZong-Ying Shen
Life of this patent
Estimating the term…
Abstract
A power-saving method is provided. The method is used in a device and includes: measuring, by a light sensor of the device, luminous intensity of ambient light and generating a measurement value of ambient light; determining whether the measurement value of ambient light is greater than a threshold; and controlling the device to switch between a quick-start mode and a standby mode based on a determination result indicating whether the measurement value of ambient light is greater than the threshold.
Claims4
A power-saving method, used in a device, comprising:
- measuring, by a light sensor of the device, luminous intensity of ambient light and generating a measurement value of ambient light;
- determining whether the measurement value of ambient light is greater than a threshold;
- when determining that the measurement value of ambient light is less than or equal to the threshold, controlling the device to operate in a standby mode;
- and
- when determining that the measurement value of ambient light is greater than the threshold, performing the steps of:
- detecting, by a motion sensor of the device, movement in a predefined area;
- generating, by the motion sensor, a motion-detection signal when detecting the movement;
- controlling the device to operate in a quick-start mode when receiving the motion-detection signal, wherein when the device operates in the quick-start mode and keeps receiving the motion-detection signal, performing the steps of:
- starting a timer;
- switching the device from the quick-start mode to the standby mode when the timer has expired and the device is not turned on;
- and
- determining, after the device has switched to the standby mode, whether the device receives the motion detection signal, and switching the device back to the quick-start mode when it is determined that the motion detection signal is received;
- and
- controlling the device to operate in the standby mode when not receiving the motion-detection signal.
11 more elements
A power-saving device, comprising:
- a light sensor, measuring luminous intensity of ambient light and generating a measurement value of ambient light;
- a motion sensor, generating a motion-detection signal when detecting movement in a predefined area;
- a control circuit, comprising a processor and a memory, wherein the control circuit is coupled to the light sensor and the motion sensor;
- wherein the processor is configured to execute a program code stored in the memory to:
- receive the measurement value of ambient light;
- determine whether the measurement value of ambient light is greater than a threshold;
- when it is determined that the measurement value of ambient light is less than or equal to the threshold, control the device to operate in a standby mode;
- and
- when it is determined that the measurement value of ambient light is greater than the threshold:
- detect, by a motion sensor of the device, movement in a predefined area;
- generate, by the motion sensor, a motion-detection signal when the movement is detected;
- control the device to operate in a quick-start mode when the motion-detection signal is received, wherein when the device operates in the quick-start mode and keeps receiving the motion-detection signal the processor:
- starts a timer;
- switches the device from the quick-start mode to the standby mode when the timer has expired and the device is not turned on;
- and
- determines, after the device has switched to the standby mode, whether the device receives the motion detection signal, and switches the device back to the quick-start mode when it is determined that the motion detection signal is received;
- and
- control the device to operate in the standby mode when the motion detection signal is not received.
15 more elements
Dependencies are inferred from the claim text.