Power-saving laser pointer mouse
AssigneePrimax Electronics Ltd.
InventorsChun-Nan Su, Hung-Ming Lin, Yi-Guang Chen
Life of this patent
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Abstract
The present invention provides a power-saving laser pointer mouse including a battery, a micro-controller and a laser diode. The power-saving laser pointer mouse can be operated in multi-stage power-saving modes according to the voltage value of the battery. The lighting time interval of the laser diode is adjusted by the micro-controller according to the voltage value of the battery. When the voltage value of the battery is reduced, the lighting time interval of the laser diode is shortened so as to achieve the power-saving purpose.
Claims3
A power-saving laser pointer mouse operating in multi-stage power-saving modes comprising:
- a battery as a voltage source and having a battery capacity;
- a micro-controller electrically connected to said battery for detecting a plurality of voltage values of said battery and outputting a switching signal, wherein a duty cycle of said switching signal is determined and varied by said micro-controller according to said detected voltage value being within a first of a plurality of voltage value ranges, wherein as said battery capacity decreases and said detected voltage value is outside said first voltage value range and within a second voltage value range, then said micro-controller varies said duty cycle of said switching signal to a second duty cycle;
- and
- a laser diode electrically connected to said micro-controller for emitting a light beam in response to said switching signal, wherein said duty cycle of said switching signal represents a proportion of high-level duration laser diode illumination for a given signal period.
Dependencies are inferred from the claim text.