Light Leakage Detection Using Sensor Arrays
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Solution Overview
Problem
Mobile devices often experience light leakage due to improper coupling between the display and bezel, leading to aesthetically undesirable light emission, which is labor-intensive and subjective to detect using traditional testing methods.
Innovation Solution
A testing device with sensor arrays positioned along the edges of a clamshell apparatus that measures light intensity and compares it to a predetermined threshold, determining if light leakage is present and its location, facilitating an objective and efficient assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional manual testing methods are used to examine light leakage, then the testing process can identify light leakage issues, but the process becomes labor-intensive and subjective
Solution Approach 1:
The patent replaces manual visual inspection with an automated optical measurement system. A light sensor array systematically measures light intensity at multiple positions along the device edges, converting subjective visual assessment into objective quantitative data. This substitution eliminates human labor requirements while improving measurement precision through consistent, repeatable measurements.
Solution Approach 2:
The testing system performs self-assessment by automatically comparing measured light intensity values against predetermined thresholds. The system independently determines pass/fail status and generates test results without requiring human interpretation, thereby eliminating subjectivity and reducing labor intensity while maintaining high productivity.
2Reliability
If manual visual inspection is used for light leakage testing, then the process can detect light leakage, but the testing becomes subjective in nature
Solution Approach 1:
The patent replaces subjective human visual inspection with an automated optical sensing system that objectively measures light intensity. This substitution ensures consistent, repeatable measurements across different devices and testers, significantly improving reliability. The system uses standardized measurement protocols and automated data processing to eliminate human variability.
Solution Approach 2:
The patent introduces a light sensor array as an intermediary between the light leakage phenomenon and the evaluation process. This intermediary device translates optical phenomena into quantifiable electrical signals that can be systematically analyzed, providing objective and consistent measurement results while maintaining manageable system complexity through well-established sensing technology.
3Productivity
If automated sensor arrays are used to measure light intensity, then objectivity and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent divides the measurement task into discrete segments by positioning light sensors at specific locations along the device edges. This segmentation allows systematic coverage of all potential light leakage points while maintaining organized data collection and analysis. The segmented approach improves productivity by enabling parallel measurements at multiple positions simultaneously.
Solution Approach 2:
The testing apparatus is designed with universal functionality to handle various device types and configurations. The sensor array and measurement system can be adapted to test different device form factors, making the system broadly applicable. This universality improves productivity across product lines while managing complexity through standardized measurement protocols and flexible positioning 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
The solution provides a systematic and objective method to detect light leakage, reducing the subjectivity and labor intensity of traditional testing by accurately identifying light leakage and its location, ensuring better quality control in device manufacturing.
Implementation Method 1
one or more sensor arrays may be coupled to the base portion... that may be configured to receive one or more light intensity measurements
Data Source
AI summary
According to one or more embodiments of the disclosure, a testing apparatus is provided. The testing apparatus may include a base portion configured to receive a device under test (DUT). The base portion may also include an array of light sensors to measure light leakage from the DUT. For example, the testing apparatus may receive, from the array of light sensors, one or more light intensity measurements associated with light leakage from between a bezel element and a display element along a first edge portion of the DUT. The testing apparatus may then transmit the measurements to a testing computer.