Dynamic Light-Sensing Region Area for Proximity Accuracy
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Solution Overview
Problem
Proximity sensing devices in electronic devices often experience reduced accuracy due to deviations in the positional relationship between the light-emitting element and the light-passing hole or gap, leading to decreased light energy reaching the light-sensing region, which affects the determination of object proximity.
Innovation Solution
A light-sensing apparatus with a dynamically adjustable light-sensing region area, where the area under the first light-transmitting region increases when the energy of light reaching the light-sensing region is reduced, compensating for blocked light by expanding the sensing region to maintain sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light-sensing apparatus uses a fixed light-sensing region area, then the device structure is simple, but the sensing accuracy decreases when positional deviations occur between the light-emitting element and the light-passing hole
Solution Approach 1:
The light-sensing region area is made dynamically adjustable rather than fixed. When positional deviations are detected between the light-emitting element and the light-passing hole, the light-sensing region area is increased to compensate for the reduced light energy reaching the sensor, thereby maintaining sensing accuracy despite structural simplicity.
2Reliability
If the housing blocks light to protect internal components, then the device is better protected, but the light energy reaching the light-sensing region is reduced, affecting proximity detection accuracy
Solution Approach 1:
The light-sensing region area parameter is changed dynamically based on light energy conditions. When the housing blocks light and reduces the energy reaching the light-sensing region, the area of the light-sensing region is increased to compensate for the energy loss, maintaining detection accuracy while preserving the protective function of the housing.
3Measurement precision
If the light-sensing region area is increased to compensate for blocked light, then the sensing accuracy is maintained, but the device complexity increases due to dynamic adjustment mechanisms
Solution Approach 1:
The light-sensing apparatus performs self-adjustment by monitoring the light energy reaching the light-sensing region and automatically modifying the light-sensing region area accordingly. This self-service mechanism maintains sensing accuracy without requiring external control systems or complex adjustment mechanisms.
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 solution ensures that the sensing value of the light-sensing element is maintained, preventing low accuracy due to positional deviations and light blocking by the housing, thereby accurately determining object proximity.
Implementation Method 1
Light emitted from the light-emitting element in the proximity sensing device can be emitted through the light-passing hole or the gap in the outer frame, and reflected by the object close to the display screen. The light reflected by the object can reach the light-sensing region of light-sensing apparatus through the light-passing hole or gap, and may be converted into an electrical signal by the light-sensing element.
Data Source
AI summary
An apparatus disposed below a housing, the apparatus including: a light-sensing element having a light-sensing region, and being configured to sense light reaching the light-sensing region through a first light-transmitting region of the housing; and where when the energy of the light that reaches the light-sensing region is reduced relative to the energy of the light that is expected to reach the light-sensing region, the area of the light-sensing region located under the first light-transmitting region increases.