Optical Mouse Position Tracking Sensor State Detection
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Solution Overview
Problem
Optical mice malfunction and experience undesired electrical power consumption when spaced apart from a worktable due to incorrect state transitions and detection of irrelevant external light images.
Innovation Solution
A position tracking sensor with a controller that determines if the optical mouse is spaced apart from a worktable by measuring light intensity, allowing for state transitions to inactive mode and reducing power consumption by intermittently turning off the light source, with user-settable timing for sensing modes to prevent false activations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the position tracking sensor periodically turns on the light source to detect images in inactive state, then power consumption is reduced, but the optical mouse may malfunction when spaced apart from the worktable due to detection of external light
Solution Approach 1:
The controller analyzes feedback from the image sensor to determine whether the optical mouse is on the worktable or spaced apart. When the image sensor detects an image during periodic activation in inactive state, the controller evaluates whether this represents valid worktable surface or external light source, and adjusts light source activation accordingly to prevent malfunction while maintaining power savings
Solution Approach 2:
The controller performs preliminary determination of the optical mouse's spatial relationship with the worktable before fully activating the light source for image detection. By assessing initial image data from periodic activations, the system prepares appropriate response actions to prevent malfunction before it occurs
2Measurement precision
If the light source is turned on continuously in active state to ensure accurate movement detection, then measurement precision is improved, but power consumption increases when the mouse is spaced apart from the worktable
Solution Approach 1:
The system dynamically adjusts the light source activation strategy based on the determined state of the optical mouse. When spaced apart from the worktable is detected, the controller modifies the periodic activation pattern in inactive state or extends the duration of inactive state, thereby reducing power consumption while maintaining measurement precision when actually on the worktable
3Use of energy by moving object
If the position tracking sensor maintains inactive state with periodic light source activation, then power consumption is reduced, but false state transitions occur when external light is detected as valid image
Solution Approach 1:
The controller uses feedback from image analysis to validate whether detected images during periodic activation represent true worktable surface or external light sources. This feedback mechanism prevents false state transitions from inactive to active state, ensuring accurate operation state management while maintaining power savings
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents malfunction and reduces electrical power consumption by accurately determining the optical mouse's state and minimizing unnecessary light source activation when spaced apart from the worktable.
Implementation Method 1
an image sensor for receiving light inputted from exterior of the optical mouse to detect an image
Implementation Method 2
determines whether the optical mouse is spaced apart from a worktable using the image information
Data Source
AI summary
Disclosure is a position tracking sensor of an optical mouse and method of controlling the same. The position tracking sensor comprises an image sensor for receiving light inputted from exterior of the optical mouse to detect an image and outputting image information on the detected image, and a controller for determining whether the optical mouse is spaced apart from a worktable using the image information and turning off a light source when it is determined that the optical mouse is spaced apart from the worktable. Thus, it is possible not only to prevent malfunction of the optical mouse resulting from the image detected by external light when the optical mouse is spaced apart from the worktable, but also to prevent the light source from being unnecessarily turned on and the resulting undesired consumption of electrical power.