Liquid Crystal Alignment via Segmented Common Electrode Voltage
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Solution Overview
Problem
The existing manufacturing methods for liquid crystal displays face inefficiencies in initial alignment of liquid crystal molecules, leading to increased production time, equipment requirements, and defects like light leakage due to applying voltages individually to each cell and using the same voltage magnitude for gate and data lines, which is different during actual operation.
Innovation Solution
A manufacturing method that applies voltage to a mother panel glass unit with multiple cells simultaneously, allowing different voltages to be applied to the gate and data lines, reducing manufacturing costs and improving alignment accuracy by dividing the common electrode into insulated regions for precise voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If voltage is applied to each cell individually for initial alignment, then alignment precision can be maintained, but manufacturing time increases and productivity decreases
Solution Approach 1:
The common electrode is divided into multiple insulated regions corresponding to different cells or cell groups. Each region can receive independent voltage application through separate pad units, enabling simultaneous alignment treatment for multiple cells while maintaining individual voltage control. This segmentation resolves the contradiction by allowing parallel processing without sacrificing precision.
Solution Approach 2:
Multiple cells are grouped together and treated simultaneously through shared pad units during the initial alignment process. By combining the treatment of multiple cells in one operation and applying voltage to the entire mother panel at once, manufacturing time is reduced while the insulated regions ensure each cell group receives appropriate voltage for proper alignment.
2Device complexity
If the same voltage magnitude is applied to gate line and data line for initial alignment, then equipment complexity is reduced, but alignment accuracy decreases causing light leakage defects
Solution Approach 1:
Different voltage magnitudes are applied to gate lines and data lines based on their specific requirements for optimal liquid crystal alignment. The system provides localized voltage control where each line type receives the appropriate voltage level, improving alignment accuracy and preventing light leakage defects while maintaining relatively simple equipment through the use of standard voltage sources.
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 method reduces manufacturing costs and enhances the accuracy of initial alignment, minimizing defects such as light leakage by applying voltages of desired magnitudes to the gate and data lines of each cell simultaneously, thereby improving the productivity and quality of liquid crystal displays.
Implementation Method 1
a prepolymer is used that is polymerized by light such as ultraviolet rays
Implementation Method 2
a voltage is applied to the electrodes to realign liquid crystal molecules of the liquid crystal layer to thereby regulate the transmittance of light passing through the liquid crystal layer
Data Source
AI summary
A manufacturing method for a display panel includes: forming a first display panel including a plurality of pixel electrodes, gate lines and data lines connected to the pixel electrodes, a first pad unit connected to the gate lines, and a second pad unit connected to the data lines; forming a second display panel including a common electrode; forming a first short point connected to the first pad unit; forming a second short point connected to the second pad unit; adhering the first display panel and the second display panel; dividing the second display panel into a plurality of regions insulated from each other, a first region corresponding to the first short point, a second region corresponding to the second short point, and a third region; and applying a first voltage to the first region, a second voltage to the second region, and a third voltage to the third region.