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Mechanical motion sensor and low-power trigger circuit

A motion sensor, tilt sensor technology, used in instruments, transmission systems, electrical components, etc.

Inactive Publication Date: 2008-02-13
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Mechanical motion sensor and low-power trigger circuit
  • Mechanical motion sensor and low-power trigger circuit
  • Mechanical motion sensor and low-power trigger circuit

Examples

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Embodiment Construction

[0062] The present invention is a mechanical motion sensor and low power wake-up circuit for use in an input device such as a wireless optical mouse that reduces power consumption and significantly improves battery life. Compared with the capacitive switch of the hand sensor in sleep mode in the prior art, the present invention saves current consumption. As previously described, such prior art capacitive switches use up to 250 to 350 μA of current even in sleep mode. In comparison, the present invention uses only 5-8 μA of current in sleep mode. In this way, battery life is extended.

[0063] Referring to FIG. 7 , it shows a wake-up system for an input device with a printed circuit board inside according to a first embodiment of the present invention. The wake-up system comprises a motion sensor 1 mounted on a printed circuit board within an input device such as a mouse. The input device may be an optical wireless mouse.

[0064] The motion sensor has a motion signal outpu...

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PUM

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Abstract

A wake-up system for an input device having a circuit board inside it has a motion sensor mounted on the printed circuit board inside the input device. The motion sensor has a motion signal output and the wake-up system further include a detection circuit connected to the motion signal output. The detection circuit has a wake-up signal output. The input device can be an optical wireless mouse. The motion sensor may be a mechanical motion sensor such as a tilt sensor having a ball contact and stationary contacts. The stationary contacts may be printed directly on the printed circuit board. The ball contact and stationary contacts form an electrical switch and are gold-plated. The ball contact is conductive. The motion sensor may be sealed to avoid corrosion. The detection circuit detects a change of state of whether the electrical switch formed by the ball contact and stationary contact is opened or closed. A first embodiment can amplify the motion signal from the motion sensor and a second embodiment can detect a low signal from the motion sensor. Also disclosed is a method of waking up an input device such as a mouse and an input device comprising the wake-up system.

Description

technical field [0001] The present invention relates to a system for generating a trigger signal, such as a wake-up system for a mouse. More specifically, the invention relates to sensors for determining when a device such as a mouse is being used, and wake-up circuitry to allow power conservation. Background technique [0002] Wireless mice consume a lot of power which shortens battery life. An optical mouse does not include moving parts that could otherwise be used to detect when the mouse is moved or shaken in order to wake it up, so the mouse may have a sleep mode and a wake mode in order to reduce power consumption. In Microsoft's optical mouse, a capacitive switch or hand sensor detects when a hand is placed on the mouse for operation. However, even in sleep mode, the microprocessor continues to draw power searching to see if the hand is on the mouse. Even in sleep mode, this capacitive switch uses 250 to 350µA of current. Small changes in capacitance are detected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/08G06F1/26G06F1/32H04B1/38H04M1/00G05F1/10G05F3/02G06FG06F3/033
CPCG06F1/3259G06F3/03543G06F1/3203Y02B60/1253Y02D10/00
Inventor 查特瑞·西塔拉塞伊武田敏贞小迪恩·拉里·赖斯约汉·郭查尔斯·李·福布勒
Owner MINEBEA CO LTD
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