LCD Panel Spacer Prevents Peripheral Short Circuits
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Solution Overview
Problem
Liquid crystal display panels face issues with short circuits between the TFT substrate and the CF substrate in the peripheral region due to abnormal handling or pressure during manufacturing, leading to abnormal displays.
Innovation Solution
The implementation of spacers between the conductive layers in the peripheral region, with a larger covering area than the conductive layer and an uneven surface, ensures electrical insulation and prevents contact between the conductive layers, thereby avoiding short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transparent conductive layer is disposed on each metal layer and electrically connected through contact plugs, then electrical connection between different metal layers is achieved, but the risk of short circuit between TFT substrate and CF substrate increases during manufacturing due to pressing or abnormal handling
Solution Approach 1:
The patent introduces a first spacer as an intermediary element between the first conductive layer (on TFT substrate) and the second conductive layer (on CF substrate) in the peripheral region. This spacer acts as a physical barrier and electrical insulator, preventing direct contact between the conductive layers even when external pressure is applied during manufacturing, thus eliminating the short circuit risk while maintaining electrical connection reliability in the display region
Solution Approach 2:
The patent segments the conductive layer structure by introducing insulating spacers that divide the peripheral region into electrically isolated zones. The first spacer divides the space between the first and second conductive layers, creating distinct electrical zones that prevent unwanted electrical interaction while allowing the display region to maintain its conductive connectivity
2Object-affected harmful factors
If spacers are disposed between conductive layers in the peripheral region with larger covering area, then electrical insulation and short circuit prevention are improved, but device structure complexity increases
Solution Approach 1:
The patent applies local quality by introducing spacers only in the peripheral region where bridge circuits are located, while leaving the display region without spacers to maintain its optical and electrical properties. The first spacer has a covering area substantially larger than or equal to the first conductive layer, providing sufficient insulation locally without affecting the overall device simplicity
Solution Approach 2:
Instead of making the conductive layers themselves insulating or changing their properties, the patent inverts the approach by introducing a third element (the spacer) with insulating properties between the conductive layers. This inversion allows the conductive layers to maintain their original function while the spacer provides the necessary electrical isolation
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 solution effectively prevents short circuits between the pixel electrode and the common electrode, ensuring reliable operation and preventing damage to the internal circuit of the liquid crystal display panel during manufacturing and usage.
Implementation Method 1
The first spacer electrically insulating the first conductive layer from the second conductive layer
Data Source
AI summary
A liquid crystal display panel has a display region and a peripheral region defined thereon. The peripheral region is disposed at an outside of the display region, and the peripheral region includes a bridge circuit region. The liquid crystal display panel includes a first substrate, a first conductive layer, a second substrate, a second conductive layer and a spacer. The first conductive layer is disposed on the first substrate in the bridge circuit region. The second substrate is disposed in parallel to a side of the first substrate, and the second conductive layer is disposed on the second substrate in the peripheral region. The spacer is disposed between the first conductive layer and the second conductive layer in the bridge circuit region, and the spacer electrically isolates the first conductive layer from the second conductive layer.