LCD Lower Substrate Assembly Non-Crossing Adaption Pads
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Solution Overview
Problem
In liquid crystal displays, the increasing number of alignment wires leads to crossing conditions, inducing static electricity and affecting the electric field distribution between the array and color filter substrates, resulting in poor liquid crystal alignment.
Innovation Solution
A liquid crystal display lower substrate assembly is designed with a carrier board, alignment pads, and adaption pads that are electrically connected to alignment wires in a manner that prevents wire crossings, ensuring that voltage signals are transmitted to common electrodes without intersecting other wires, thus eliminating static electricity and improving electric field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of alignment wires is increased to improve alignment precision, then the alignment precision is improved, but wire crossings occur which induce static electricity and affect electric field distribution
Solution Approach 1:
The patent introduces adaption pads as an intermediate connection layer between alignment wires and common electrodes. This adds a spatial dimension to the connection structure, allowing wires to connect to pads rather than directly crossing each other, thereby eliminating wire crossings while maintaining alignment precision.
Solution Approach 2:
Adaption pads serve as intermediary elements that mediate the connection between alignment wires and common electrodes. The pads receive voltage signals from alignment wires and transmit them to common electrodes, eliminating the need for direct wire crossings and preventing static electricity induction.
2Reliability
If adaption pads are connected to alignment wires to transmit voltage signals, then the electric field distribution is improved, but wire crossings may occur at connection portions
Solution Approach 1:
The connection structure is segmented into distinct functional elements: alignment wires for signal input, adaption pads for signal distribution, and common electrodes for field generation. This segmentation allows each element to perform its function without requiring complex interconnections, simplifying the overall structure while improving reliability.
3Measurement precision
If alignment wires are laid densely to improve alignment accuracy, then the alignment accuracy is improved, but the likelihood of wire crossings increases
Solution Approach 1:
By introducing adaption pads as an intermediate layer, the patent transitions from a two-dimensional wire layout problem to a three-dimensional connection architecture. This allows dense wire arrangements to maintain alignment accuracy while preventing crossings through the intermediate pad layer.
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 design prevents static electricity-induced poor alignment of liquid crystals by ensuring non-crossing connections between adaption pads and alignment wires, maintaining optimal electric field distribution and alignment between the substrate assemblies.
Implementation Method 1
the first alignment wire and the first-group adaption pads both not crossing any other alignment wires on the carrier board, except the first alignment wire
Data Source
AI summary
An LCD lower substrate assembly is assembleable with an LCD upper substrate assembly. The LCD lower substrate assembly includes a carrier board and a first alignment pad, a first alignment wire and a first group of adaption pads having a function of electrical conduction, which are arranged on the carrier board. The first alignment pad is electrically connected to the first alignment wire to receive a voltage signal and to apply the voltage signal to the first alignment wire. The first-group adaption pads are electrically connected to the first alignment wire in a spaced manner to receive the voltage signal that, after the assembly of the two substrate assemblies, is transmittable to a first group of common electrodes on the LCD upper substrate assembly. Connection portions between the adaption pads and the first alignment wire and the first-group adaption pads do not cross other alignment wires on the carrier board.