Optical Mouse Motion Sensor Dynamic Image Area Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless optical mice face issues with insufficient accuracy in tracking cursor movement speed and high energy consumption due to the method of displacement detection, which affects user experience and battery life.
Innovation Solution
A motion detecting device that dynamically adjusts its image sensing region based on surface flatness by calculating exposure and image characteristic values to determine appropriate search radii, thereby optimizing tracking speed and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image sensor captures reference images consecutively with fixed sampling period to detect displacement, then the tracking accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the image sensing region size based on surface flatness detection. When the surface is flat, a larger search region is used to improve tracking accuracy. When the surface is rough, a smaller search region is used to reduce power consumption. This dynamic adjustment resolves the contradiction between maintaining high tracking accuracy and reducing power consumption.
Solution Approach 2:
The patent changes the parameter of image sensing region size according to surface conditions. By detecting surface flatness and adjusting the search region radius accordingly, the system optimizes the balance between tracking precision and energy consumption differentially based on actual operating conditions.
2Speed
If the image sensor uses a larger image sensing region to detect displacement accurately, then the tracking speed is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the image sensing region size based on real-time surface flatness detection. On flat surfaces, a larger search region enables faster and more accurate tracking. On rough surfaces, a smaller search region reduces computational load and power consumption, thus resolving the contradiction between tracking speed and energy usage.
Solution Approach 2:
The patent adjusts the search region radius parameter according to surface conditions detected through image analysis. This parameter change allows the system to optimize tracking performance on flat surfaces while conserving energy on rough surfaces, resolving the speed-power consumption tradeoff.
3Adaptability or versatility
If the optical mouse includes light source, digital signal processor, image sensor and wireless transmission unit, then the functionality is improved, but the total energy consumption increases
Solution Approach 1:
The patent applies partial action by dynamically adjusting the image sensing region size rather than always using the maximum region. This reduces the processing load on the digital signal processor and lowers power consumption of the image sensor, while maintaining necessary functionality for wireless optical mouse operation.
Solution Approach 2:
The system dynamically adjusts operational parameters (image sensing region size) based on surface conditions, allowing the full functionality of the optical mouse to be maintained when needed while reducing power consumption during operation on surfaces where full performance is not required.
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
The device enhances tracking speed and reduces power consumption by dynamically adjusting the image sensing region according to surface flatness, improving user experience and extending battery life.
Implementation Method 1
The light source is configured for emitting a light
Implementation Method 2
The image capture unit is configured for capturing at least one reference image of the surface
Data Source
AI summary
A motion detecting device and the method for dynamically adjusting image sensing area is disclosed. The motion detecting device includes a light source, an image capture unit and a processing unit. The image capture unit is used to capture reference image according to fixed sampling period. The processing unit is used to calculate exposure reference value of the light source and image characteristic value of reference image. The processing unit according to the exposure reference value and the image characteristic value to determine whether the surface is in first rough coefficient range or second rough coefficient range. If rough coefficient of the surface is in the first rough coefficient range, the processing unit defines first search radius or second search radius to increase or decrease the image sensing area. Otherwise, the processing unit defines third search radius or fourth search radius to increase or decrease the image sensing area.