Liquid Crystal Panel Transparent Conductive Layer ESD Protection
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Solution Overview
Problem
The transparent conductive layer in liquid crystal displays can introduce electrostatic discharges, damaging internal electrical elements such as conductive metal lines and driver ICs.
Innovation Solution
A liquid crystal panel design where the conductive layer on the second substrate is partially uncovered, with a sealant enclosing the transparent conductive electrode to prevent external electrostatic exposure, and a manufacturing method involving forming a conductive layer on the second substrate with an uncovered peripheral region, attaching a sealant to create a receiving space, and filling it with liquid crystal materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transparent conductive layer extends to the edge of the CF substrate, then the electrical connection between substrates is improved, but the risk of electrostatic discharge damaging internal electrical elements increases
Solution Approach 1:
The conductive layer is segmented into two regions: a first conductive layer extending to the edge for electrical connection, and a second conductive layer surrounded by the sealant for ESD protection. This segmentation allows the patent to simultaneously achieve good electrical connection and electrostatic discharge protection by separating the functions of different conductive regions.
Solution Approach 2:
The sealant acts as an intermediary barrier between the second conductive layer and the external environment. By surrounding the second conductive layer, the sealant mediates the protection against electrostatic discharge while maintaining the electrical connection function of the first conductive layer, thus resolving the contradiction between connectivity and ESD vulnerability.
2Object-affected harmful factors
If the conductive layer is fully covered for protection, then electrostatic discharge protection is improved, but electrical connection capability deteriorates
Solution Approach 1:
The conductive layer is divided into a first conductive layer that extends to the edge for electrical connection and a second conductive layer that is surrounded by the sealant for protection. This segmentation enables simultaneous achievement of both electrical connection and ESD protection without compromising either function.
Solution Approach 2:
Different regions of the conductive layer are given different properties: the first conductive layer maintains exposure for electrical connection, while the second conductive layer is surrounded by the sealant for ESD protection. This local differentiation of quality allows the patent to optimize both electrical connection and protection in their respective regions.
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
Prevents damage to internal electrical elements by shielding the transparent conductive electrode from electrostatic discharges, ensuring reliable image display without exposing it to external electrostatic interference.
Implementation Method 1
The sealant is provided at the peripheral region of the first substrate and the second substrate... The sealant encloses the transparent conductive layer, preventing exposure to the external atmosphere
Implementation Method 2
When a voltage is provided to the TFT substrate and the CF substrate, an electrical field is produced between the TFT substrate and the CF substrate to control the rotation of the liquid crystal molecular of the liquid crystal layer
Data Source
AI summary
An exemplary liquid crystal panel (2) has a first substrate (21); a second substrate (23) opposite to the first substrate, which includes a conductive layer formed (233) thereat; a liquid crystal layer (25) sandwiched between the first and the second substrates, and a sealant (27) provided at the peripheral region of the first substrate and the second substrate. The conductive layer is adjacent to the liquid crystal layer, which remains the peripheral region of the second substrate uncovered.