Liquid Crystal Panel Low-Resistance Common Electrode
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Solution Overview
Problem
Conventional liquid crystal panels experience image distortion due to waveform distortion of the common voltage signal caused by the resistance-capacitance circuit formed by the liquid crystal capacitor and the essential resistance of the common electrode layer, leading to horizontal crosstalk and impaired image display.
Innovation Solution
A liquid crystal panel design featuring a transparent conductive common electrode layer with frame-shaped protrusions in the non-displaying region, where the conductive adhesive blocks contact the common electrode layer, expanding the contact area and reducing the essential resistance, thereby minimizing signal interference and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the common electrode layer is used with conventional structure, then the liquid crystal panel can be manufactured with standard processes, but the essential resistance of the common electrode layer causes waveform distortion of the common voltage signal
Solution Approach 1:
The patent introduces a new spatial dimension by adding frame-shaped protrusions that extend from the first substrate into the non-displaying region. These protrusions create additional contact areas for the conductive adhesive blocks, effectively increasing the contact area in a spatial dimension without changing the material composition or manufacturing process complexity.
Solution Approach 2:
The common electrode layer is segmented by the frame-shaped protrusions into multiple contact regions. The protrusions divide the non-displaying region into separate zones, allowing the conductive adhesive blocks to contact the common electrode layer at multiple discrete locations, thereby reducing the essential resistance through parallel conduction paths.
2Reliability
If the contact area between conductive adhesive blocks and common electrode layer is increased, then the essential resistance is reduced, but the structure becomes more complex
Solution Approach 1:
The frame-shaped protrusions are merged with the existing first substrate structure, combining the substrate and the protrusions into a single integrated component. This merging approach increases the contact area without requiring separate structural elements, thereby reducing structural complexity while improving essential resistance.
Solution Approach 2:
The frame-shaped protrusions serve multiple functions: they provide additional contact areas for conductive adhesive blocks, define the non-displaying region boundaries, and maintain structural integrity of the first substrate. This multi-functionality reduces the need for additional components, thereby reducing overall structural complexity.
3Reliability
If frame-shaped protrusions are added to increase contact area, then signal distortion is eliminated, but fabrication steps are increased
Solution Approach 1:
The frame-shaped protrusions are formed during the initial substrate fabrication process, before the common electrode layer and conductive adhesive blocks are added. By performing the protrusion formation as a preliminary action, the patent avoids adding extra fabrication steps later in the manufacturing process, thereby maintaining ease of manufacture while eliminating signal distortion.
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 expanded contact area between the conductive adhesive blocks and the common electrode layer reduces the essential resistance, eliminating signal distortion and improving display quality without adding fabrication steps, as the protrusions are fabricated simultaneously with existing components.
Implementation Method 1
a transparent conductive layer provided at a surface of the first substrate and capable of transmitting a common voltage signal to the liquid crystal layer
Implementation Method 2
The expanded contact area between the conductive adhesive blocks and the common electrode layer reduces the essential resistance, eliminating signal distortion
Data Source
AI summary
An exemplary liquid crystal panel (20) includes a first substrate (22), a second substrate (24) facing toward the first substrate (22), a liquid crystal layer (23) sandwiched between the two substrates, and a plurality of the conductive adhesive blocks (225) in the non-displaying region. The first substrate includes a non-displaying region (222). A transparent conductive layer (226) is disposed at a surface of the first substrate and capable of transmitting a common voltage signal to the liquid crystal layer. The first substrate at the non-displaying region includes protrusions (253) defining a plurality of gaps (254) therebetween. The transparent conductive layer covers the protrusions including parts of the protrusions defining the gaps. The conductive adhesive blocks contact the transparent conductive layer at the non-displaying region.