Liquid Crystal Alignment Test Apparatus Short Circuit Detection
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Solution Overview
Problem
Current liquid crystal alignment test apparatuses require manual intervention to determine short circuits between signal input ports, necessitating the apparatus to be turned off, which wastes time and prevents simultaneous testing of other substrates.
Innovation Solution
A liquid crystal alignment test apparatus with a probe tool, power providing device, and resistance detection device that applies voltage and detects resistance values without shutting down, using programmable logic circuits and a voltmeter to determine short circuits between signal input ports, allowing continuous testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the alignment test apparatus is turned off to manually test resistance values, then the resistance values can be detected, but the apparatus cannot continue testing other substrates, wasting time
Solution Approach 1:
The patent combines the resistance detection function with the existing alignment test apparatus by integrating a resistance detection device that uses the same probe tool and power providing device. This merging allows the apparatus to perform both alignment testing and resistance value detection simultaneously without requiring manual intervention or shutting down, thereby resolving the contradiction between measurement precision and productivity
Solution Approach 2:
The patent makes the alignment test apparatus multi-functional by adding resistance detection capability to the existing alignment testing system. The resistance detection device can detect resistance values between signal input ports using the same probe tool infrastructure, allowing the apparatus to serve multiple purposes (alignment testing and electrical defect detection) without requiring separate equipment or manual operations
2Ease of operation
If the alignment test apparatus is turned off, then resistance values can be tested manually, but other substrates cannot be tested simultaneously
Solution Approach 1:
The patent enables the apparatus to perform resistance detection automatically without requiring manual intervention. The resistance detection device automatically connects to the probe tool, selects signal input ports, and detects resistance values autonomously. This self-service capability eliminates the need for manual testing operations and allows continuous automated testing of multiple substrates, resolving the contradiction between ease of manual operation and time loss
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 continuous testing of liquid crystal alignment and detection of short circuits without shutting down the apparatus, reducing time wastage and improving efficiency in evaluating substrate quality.
Implementation Method 1
when the substrate is applied voltage, through applying ultraviolet (UV) light to irradiate the substrate to cause monomers of the substrate to reflect, then achieving the alignment
Implementation Method 2
detecting resistance values of each two signal input ports of the liquid crystal array substrate through the resistance detection device
Data Source
AI summary
A liquid crystal alignment test method includes: connecting a liquid crystal array substrate to be tested with a liquid crystal alignment test apparatus; applying corresponding voltages to signal input ports of the liquid crystal array substrate via a voltage providing device and then to execute an image check for the liquid crystal array substrate; and detecting resistance values of each two signal input ports of the liquid crystal array substrate via s resistance detection device to judge whether each two of the signal input ports are short-circuited.