Display Device Polarizer Conductive Layer Static Discharge
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Solution Overview
Problem
Liquid crystal display devices face issues with static electricity buildup on the counter-substrate, leading to misalignment of liquid crystal molecules, degraded display quality, and reduced manufacturing yield due to static discharge damaging wires and circuits.
Innovation Solution
A display device structure featuring a first substrate with a conductive layer grounded and electrically connected to a second conductive layer via a connecting material, which prevents static electricity buildup and external electric field effects by creating a conductive path through a polarizer and connecting material, ensuring the first and second conductive layers are connected via holes and a recess, enhancing the reliability of the electrical connection and reducing the risk of static discharge damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive layer is disposed on the outer surface of the counter-substrate and connected to the grounded line with a conductive tape, then static electricity buildup is prevented and display quality is improved, but the device structure becomes more complex and manufacturing steps increase
Solution Approach 1:
The patent combines the conductive layer with the polarizer by forming the conductive layer on the outer surface of the polarizer instead of using a separate conductive tape connection. This merging of functions reduces structural complexity while maintaining the static electricity prevention capability that improves display quality.
Solution Approach 2:
The polarizer is given multiple functions: it serves both as an optical component for liquid crystal modulation and as a substrate for the conductive layer that prevents static electricity buildup. This multi-functionality eliminates the need for separate conductive components, reducing device complexity while maintaining reliability.
2Reliability
If a conductive layer is disposed on the outer surface of the counter-substrate and connected to the grounded line, then manufacturing yield is improved by preventing static discharge damage, but the device complexity and manufacturing process complexity increase
Solution Approach 1:
The conductive layer is integrated with the polarizer manufacturing process, forming the conductive layer on the polarizer during its production. This eliminates the need for separate conductive tape application steps, reducing manufacturing process complexity while maintaining the protection against static discharge that improves manufacturing yield.
Solution Approach 2:
The conductive layer is formed on the polarizer during the polarizer manufacturing process itself, before the polarizer is assembled into the display device. This preliminary action ensures static protection is built-in from the start, simplifying the overall manufacturing process while protecting against static discharge damage.
3Reliability
If additional conductive layers and connection structures are added to prevent static electricity, then display quality and manufacturing yield are improved, but the device thickness increases
Solution Approach 1:
The conductive layer is formed on the outer surface of the existing polarizer without adding separate connection structures or thick conductive components. This merging approach provides static protection while maintaining the compact thickness of the display device.
Solution Approach 2:
The conductive layer is implemented as a thin film on the polarizer surface, providing effective static electricity prevention and external electric field blocking without adding significant thickness to the device structure.
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 configuration improves display quality by preventing static-induced misalignment and enhances manufacturing yield by protecting against static discharge, while also allowing for a thinner and more compact display device design without the need for additional conductive layers.
Implementation Method 1
The connecting material electrically connects the first conductive layer and the second conductive layer
Implementation Method 2
block the electric field from the outside by the conductive layer
Data Source
AI summary
According to one embodiment, a display device includes first and second substrates, a display function layer, a polarizer, and a connecting material. The first substrate includes a first conductive layer. The second substrate includes a basement having first and second surfaces. The display function layer is disposed between the substrates. The polarizer is disposed above the second surface and includes a second conductive layer. The connecting material electrically connects the first and second conductive layers. The basement has a first hole. The polarizer has a second hole. The connecting material contacts the first and second conductive layers via the first and second holes.