Sensor Height Difference Resolves Ambient Light Interference
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Solution Overview
Problem
Conventional sensors face accuracy issues in proximity sensing due to interference from ambient signals, particularly ambient light, as the enlargement of the light sensing angle for ambient sensing elements also increases the interference for proximity sensing elements.
Innovation Solution
A sensor design with a height difference between the first and second receiving units, where the second receiving unit for ambient signals has a larger light sensing angle than the first receiving unit for proximity signals, minimizing interference and maintaining accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light sensing angle of the ambient sensing element is enlarged to detect ambient signals in a wider range, then the ambient sensing capability is improved, but the proximity sensing accuracy deteriorates due to increased interference
Solution Approach 1:
The patent introduces a vertical dimension by setting different heights for the ambient sensing element and proximity sensing element relative to the substrate. The ambient sensing element is positioned at a first height while the proximity sensing element is positioned at a second height, creating a height difference that enables the ambient sensing element to have a larger light sensing angle without increasing the proximity sensing element's signal reception angle, thus resolving the interference problem
2Illumination intensity
If the ambient sensing element is lifted to enlarge its light sensing angle, then the ambient signal detection capability is improved, but the proximity sensing element receives stronger interference signals
Solution Approach 1:
The patent applies local quality by giving different spatial positions to different sensing elements. The ambient sensing element is positioned at a specific height optimized for wide-angle ambient light detection, while the proximity sensing element is positioned at a different height optimized for directional signal reception. This localized optimization allows each element to perform its function effectively without interfering with the other
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
Enables detection of ambient signals in a wider range while maintaining proximity sensing accuracy by limiting the first light sensing angle and enhancing the second light sensing angle, thus reducing interference and improving overall sensor performance.
Implementation Method 1
The signal emitting unit 120 is utilized for emitting signals such as magnetic signals, electrical signals or electromagnetic signals (e.g. light signals)
Implementation Method 2
The ambient sensing element 140 receives nearby ambient signals (such as ambient light) to determine strength of ambient signals
Data Source
AI summary
A sensor includes a first reception unit configured for sensing a first signal of a first frequency band and a second reception unit configured for sensing a second signal of a second frequency band. There is a height difference between the first reception unit and the second reception unit.