LED Substrate Line Detection Using Liquid Crystal Optical Switching
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Solution Overview
Problem
The detection of circuit lines on light emitting diode substrates is inefficient and difficult to meet the requirements as the number of LED chips increases, especially when using traditional probe methods that require individual detection of each line.
Innovation Solution
A line detecting tool and method utilizing a liquid crystal plate between a detecting light source and the light emitting diode substrate, which transforms between light transmission and shielding states based on electrode energization, allowing simultaneous detection of multiple electrodes by observing light transmission states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a probe is used to detect each circuit line individually, then detection accuracy is maintained, but detection efficiency deteriorates significantly as the number of LED chips increases
Solution Approach 1:
The patent merges multiple individual detection operations into a single batch detection operation by placing a liquid crystal plate that contacts multiple electrode groups simultaneously. The liquid crystal plate integrates the detection function across all circuit lines, allowing parallel detection of multiple electrodes through a single lighting and observation process, thus resolving the contradiction between maintaining detection accuracy and improving detection efficiency
Solution Approach 2:
The patent replaces the mechanical probe-based detection system with an optical detection system using liquid crystal plates. Instead of physically contacting each electrode with a probe, the system uses optical fields (light transmission through liquid crystal) to detect electrode states, enabling batch detection without mechanical complexity and significantly improving detection efficiency while maintaining accuracy
2Device complexity
If traditional probe detection method is used, then detection process is simple, but it cannot meet the line detection requirements of large-scale light emitting diode substrates
Solution Approach 1:
The patent replaces the simple but inefficient mechanical probe detection with an optical detection system using liquid crystal plates. This substitution maintains operational simplicity (lighting and observation) while dramatically improving productivity by enabling batch detection of multiple electrodes simultaneously, thus meeting the requirements of large-scale LED substrates
3Productivity
If batch detection is implemented, then detection efficiency is improved, but detection method complexity increases
Solution Approach 1:
The patent uses optical fields instead of mechanical probes to achieve batch detection. The liquid crystal plate naturally contacts multiple electrodes simultaneously, and the detection process remains simple (lighting and visual observation or imaging), avoiding complex multi-probe positioning mechanisms while maintaining high detection efficiency
Solution Approach 2:
The liquid crystal plate serves as an intermediary that facilitates batch detection. It contacts multiple electrode groups simultaneously and translates their electrical states into optical states (light transmission or shielding), enabling efficient batch detection without requiring complex direct electrical connections to each electrode
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 significantly increases detection efficiency and universality, enabling batch detection of circuit lines without being limited by the spacing between electrodes, improving the detection process for light emitting diode substrates.
Implementation Method 1
the liquid crystal plate is configured to be arranged between the detecting light source and a light emitting diode substrate to be detected and to be in contact with each set of positive electrode and negative electrode of the light emitting diode substrate, so as to transform from a light transmission state to a light shielding state or from the light shielding state to the light transmission state after energizing the each set of positive electrode and negative electrode
Data Source
AI summary
Embodiments of the present disclosure provide a line detecting tool and method for a light emitting diode substrate. The line detecting tool for a light emitting diode substrate includes a detecting light source and a liquid crystal plate. The liquid crystal plate is configured to be arranged between the detecting light source and a light emitting diode substrate to be detected and to be in contact with each set of positive electrode and negative electrode of the light emitting diode substrate, so as to transform from a light transmission state to a light shielding state or from the light shielding state to the light transmission state after energizing the each set of positive electrode and negative electrode of the light emitting diode substrate to be detected. The detecting light source is configured to illuminate the liquid crystal plate.