Polarized Light Sensor System for Display Proximity Detection
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Solution Overview
Problem
Existing mobile devices face challenges in detecting the proximity of electronic displays and effectively communicating or reading data from them, particularly due to the need for precise positioning and differentiation between polarized and non-polarized light sources.
Innovation Solution
A polarized light sensor system is developed, comprising multiple light sensors with linear and circular polarizers, and an unfiltered sensor, which analyzes light intensity and polarization angles to determine if light is emitted from an electronic display, enabling the mobile device to adjust its illumination and communication protocols accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mobile devices use standard light sensors to detect proximity, then the device can detect general light presence, but it cannot differentiate between polarized light from electronic displays and non-polarized ambient light
Solution Approach 1:
The light detection function is segmented into multiple specialized sensors: polarized light sensors (with linear and circular polarizers) and unfiltered ambient light sensors. Each sensor type detects specific light characteristics, allowing the system to differentiate between polarized display light and non-polarized ambient light through comparative analysis of their respective signals.
Solution Approach 2:
Polarizers serve as intermediary optical elements that selectively filter light based on polarization state. The linear polarizer and circular polarizer act as mediators between the incoming light and the photodetectors, converting polarization information into intensity differences that can be measured and used to identify electronic displays.
2Measurement precision
If mobile devices require precise positioning near electronic displays for data reading, then data exchange accuracy improves, but the proximity range becomes limited and operation becomes more difficult
Solution Approach 1:
The system performs preliminary detection of polarized light from electronic displays before initiating data reading operations. By using polarized light sensors to identify the presence and orientation of a display screen in advance, the system can prepare the illumination system and communication protocols accordingly, reducing the need for precise manual positioning during the actual data exchange.
Solution Approach 2:
The illumination system is made dynamic and adaptive based on polarized light detection results. The system adjusts illumination intensity, angle, and timing in response to the detected display characteristics, allowing flexible operation across a wider proximity range rather than requiring fixed precise positioning.
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 system accurately detects the presence of electronic displays, facilitates data reading by adjusting illumination, and enables specialized communication modes, improving the efficiency of data exchange between mobile and electronic devices.
Implementation Method 1
A polarized light sensor system is developed, comprising multiple light sensors with linear and circular polarizers, and an unfiltered sensor, which analyzes light intensity and polarization angles to determine if light is emitted from an electronic display
Data Source
AI summary
The disclosure relates to a light sensor system for determining the proximity of electronic devices by analyzing the polarization of detected light. The light sensor system includes a plurality of light sensors each including polarizers, such as linear plane polarizers and/or circular polarizers. The filtered light sensors are each operable to detect light passing through the respective polarizers. The light sensor system further includes an unfiltered light sensor operable to detect the presence of light. The light sensor system includes a processor in operable communication with each of the light sensors, the processor operable to determine whether the detected light is polarized or non-polarized based on the accumulated data of the various polarized light sensors and unfiltered light sensor.