Light Sensor Module Dynamic Range Compensation
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Solution Overview
Problem
In full-screen electronic displays, photosensitive sensors face signal distortion due to exceeding the dynamic range of the readout integrated circuit (ROIC) when exposed to stronger light, leading to decreased accuracy in detection.
Innovation Solution
A light sensor module with a first detection region and a second detection region, where the first region collects light sensor data to determine if compensation is needed, and the second region acquires data that is then compensated using a compensating circuit to prevent signal distortion, ensuring the data remains within the ROIC's dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the photosensitive sensor is exposed to stronger light for a constant duration, then the signal intensity increases, but the signal base increases causing the sum to exceed the ROIC dynamic range, resulting in signal distortion and decreased detection accuracy
Solution Approach 1:
The detection region is divided into a first detection region and a second detection region. The first detection region collects light sensor data to determine the signal base, while the second detection region collects the actual light sensor data. This segmentation allows separate handling of signal base measurement and signal collection, enabling compensation to keep the sum within the ROIC dynamic range and prevent signal distortion.
Solution Approach 2:
The system performs preliminary action by collecting light sensor data from the first detection region to determine the signal base before processing the final light sensor data. This preliminary measurement enables the system to pre-calculate compensation values and adjust the second detection region's data accordingly, ensuring the compensated sum remains within the ROIC dynamic range and avoiding signal distortion.
2Loss of information
If the photosensitive sensor collects light sensor data from the entire detection region, then complete light field information is obtained, but processing time increases
Solution Approach 1:
The detection region is segmented into a first detection region for signal base measurement and a second detection region for light sensor data collection. This segmentation allows the system to process only relevant portions of the detection region for different purposes, reducing the overall processing time while maintaining complete light field information through coordinated data collection from both regions.
Solution Approach 2:
The system applies partial action by collecting light sensor data from the first detection region solely for determining the signal base, rather than processing the entire detection region uniformly. This partial processing approach reduces computational complexity and processing time while still obtaining complete light field information through the coordinated operation of both detection regions.
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
This approach reduces processing time and maintains accurate detection by ensuring the signal base and signal do not exceed the ROIC's dynamic range, improving the quality of light sensor data acquisition.
Implementation Method 1
at least one photosensitive device inside the first detection region is adapted to collecting first light sensor data from the first detection region under current incident light
Data Source
Figure 1A~1B
Figure 2~3A
Figure 3B~3C
AI summary
A light sensor module (10) includes a substrate (20). A first detection region (21) is provided on the substrate (20). At least one photosensitive device is provided inside the first detection region (21). The at least one photosensitive device is adapted to collecting first light sensor data from the first detection region (21) under current incident light. The first light sensor data are used for determining whether light sensor data collected by the light sensor module (10) under the current incident light are to be compensated.