Color Filter Substrate Electrode Patterns for Liquid Crystal Alignment
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Solution Overview
Problem
The existing liquid crystal display devices employing polymer sustained vertical alignment (PSVA) techniques face limitations in yield rate due to restricted external voltage application methods, which cannot be repaired after the cell process is completed.
Innovation Solution
A liquid crystal display device with specific electrode patterns on the color filter substrate allows for the application of external voltage through the color filter substrate, improving the alignment process and enabling repair or replacement of damaged electrode patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external voltage is applied through array substrate, then liquid crystal alignment is achieved, but yield rate is restricted and no repair can be performed after cell process
Solution Approach 1:
The patent inverts the conventional voltage application approach by applying external voltage through the color filter substrate instead of the array substrate. This allows voltage to be applied after the cell process is completed, enabling repair of alignment issues that would otherwise be impossible to fix. The color filter substrate becomes the voltage entry point, reversing the traditional flow and solving the repairability problem.
2Reliability
If external voltage is applied through array substrate, then liquid crystal alignment is achieved, but manufacturing efficiency is limited
Solution Approach 1:
The patent incorporates preliminary action by pre-designing the color filter substrate with electrode patterns that enable post-process voltage application. The transparent conductive layer and electrode structures are prepared in advance on the color filter substrate, allowing flexible voltage application after cell assembly without requiring array substrate modifications, thereby improving manufacturing efficiency.
3Adaptability or versatility
If complex electrode patterns are added to color filter substrate, then voltage application flexibility is improved, but device complexity increases
Solution Approach 1:
The color filter substrate's transparent conductive layer serves multiple functions: it acts as both the color filter substrate's conductive element and the voltage application electrode. The same structural layer enables both color filtering and electrical voltage application, eliminating the need for separate electrode structures and reducing overall device complexity while maintaining versatility.
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 enhances the success rate of liquid crystal alignment, reduces energy consumption, and minimizes waste by allowing voltage application through the color filter substrate, improving the overall manufacturing efficiency and flexibility.
Implementation Method 1
for applying an external voltage to the first electrode pattern so as to form an alignment electric field for liquid crystal layer between the first electrode pattern and pixel electrode
Implementation Method 2
using UV radiation to make reactive monomers in the liquid crystal to line up according to electric field formed by applied external voltage
Data Source
AI summary
The present invention provides a liquid crystal display device, which includes a plurality of pixel units. Each of the pixel units further includes a liquid crystal layer, a pixel electrode and a corresponding electrode. The pixel electrode and the corresponding electrode are disposed on two opposite sides of liquid crystal layer. The corresponding electrode further includes a first electrode pattern disposed oppositely to the pixel electrode, and a second electrode pattern connected to the first electrode pattern for applying an external voltage to the first electrode pattern so as to form an alignment electric field for the liquid crystal layer between the first electrode pattern and the pixel electrode. The present invention changes the way in which the external voltage is applied, and introduces the external voltage from one side of the color filter substrate to improve success rate of liquid crystal alignment, reduce energy-consumption and reduce waste.