Optical Sensor Module Adaptive Exposure Control for Surface Reflectivity
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Solution Overview
Problem
Image capture devices, particularly pointing devices, face errors in judging direction and distance due to uneven brightness caused by varying light reflection from different surfaces, as they lack effective methods to adjust exposure conditions adaptively.
Innovation Solution
An optical sensor module method that adjusts exposure conditions by receiving reflected light, generating image signals, setting optimal exposure based on luminance signals, and repeating the process to adapt to different surfaces, incorporating a motion estimation procedure to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the optical sensor module captures reflected light under the same optical condition, then the device structure remains simple, but uneven brightness occurs due to varying surface reflectivity
Solution Approach 1:
The patent applies dynamics by making the exposure condition adjustable rather than fixed. The optical sensor module dynamically changes its exposure parameters (such as exposure time or aperture) in response to detected surface reflectivity characteristics, allowing adaptation to different working surfaces while maintaining simple overall device structure.
Solution Approach 2:
The patent implements parameter changes by modifying the exposure conditions (exposure time, aperture size, or light intensity) of the optical sensor module according to the luminance signals and image quality signals. This allows the system to compensate for varying surface reflectivity by adjusting key parameters, thereby achieving uniform brightness without complex structural modifications.
2Ease of operation
If the optical sensor module uses fixed exposure condition, then the operation is simple, but errors occur in judging direction and distance due to uneven brightness
Solution Approach 1:
The patent applies self-service by enabling the optical sensor module to automatically adjust its own exposure conditions based on the captured image signals. The system uses the luminance signals and image quality signals to autonomously determine optimal exposure parameters, eliminating the need for manual intervention while improving movement detection accuracy.
Solution Approach 2:
The patent implements feedback by using the image quality signals and luminance signals to adjust the exposure conditions. The system continuously monitors the quality of captured images and uses this feedback information to optimize exposure parameters, thereby improving the reliability of movement detection while maintaining ease of operation.
3Adaptability or versatility
If the optical sensor module adjusts exposure condition manually, then the adaptability to different surfaces is improved, but the operation complexity increases
Solution Approach 1:
The patent applies self-service by enabling the optical sensor module to automatically adjust its own exposure conditions based on the captured image signals. The system uses the luminance signals and image quality signals to autonomously determine optimal exposure parameters, eliminating the need for manual intervention while improving movement detection accuracy.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated signal-based control system. Instead of requiring physical or manual adjustment of exposure parameters, the system uses electronic signal processing (luminance signals and image quality signals) to automatically optimize exposure conditions, thereby achieving surface adaptability without increasing operational complexity.
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 method reduces errors in judging direction and distance by automatically adjusting exposure conditions to match varying surface reflectivity, improving accuracy and reliability in movement detection.
Implementation Method 1
receiving reflected light reflected by a working surface; generating an image signal by exposing the optical sensor module to the reflected light
Data Source
AI summary
A method for adjusting an exposure condition of an optical sensor module includes the following steps, (A) receiving reflected light reflected by a working surface; (B) generating an image signal by exposing the optical sensor module to the reflected light, in which the image signal includes a plurality of luminance signals and an image quality signal; (C) setting an exposure condition of the optical sensor module according to part of the luminance signals; (D) repeating Step (B) and Step (C) under different exposure conditions so that the optical sensor module generates a plurality of image quality signals; and (E) setting an optimal exposure condition corresponding to the working surface according to the image quality signals under the different exposure conditions. The optical sensor module is applicable to a pointing device.