Transparent Bridge Structure for Touch Display Electrode Reliability
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Solution Overview
Problem
Touch display panels face issues with electrostatic discharge causing metal bridges to break, leading to disconnection and performance degradation due to high electrostatic current flowing through thin metal bridges, which are used to minimize visibility.
Innovation Solution
A touch display panel design featuring transparent bridge structures between metal second electrode blocks, arranged in different layers, and sub-pixels with apertures and non-aperture portions, allowing for a wider bridge structure that reduces the risk of breakdown during electrostatic discharge, while maintaining visibility minimization and improving connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal bridges are made thin to reduce visibility, then visibility of metal bridges is reduced, but electrostatic current causes the bridges to break and disconnect
Solution Approach 1:
The patent divides the metal electrode into multiple metal electrode blocks connected by transparent bridges. This segmentation allows the metal bridges to be thinner and less visible while distributing the electrostatic current across multiple connection paths, preventing any single bridge from breaking under high electrostatic current stress.
Solution Approach 2:
The patent introduces transparent bridges as intermediary structures to connect metal electrode blocks. These transparent bridges serve as current-conducting pathways that are both visible (transparent) and reliable (sufficient cross-section to handle electrostatic current), resolving the contradiction between visibility and reliability.
2Illumination intensity
If transparent bridges are used to connect electrode blocks, then visibility is minimized, but bridge structure may break under high electrostatic current
Solution Approach 1:
The patent employs a composite structure combining transparent bridge materials with metal electrode blocks. The transparent bridges are designed with sufficient thickness and cross-section to handle electrostatic current, while the metal electrode blocks provide additional current pathways. This composite approach maintains visibility minimization while ensuring structural strength under electrostatic stress.
3Illumination intensity
If metal bridges are made thin to reduce visibility, then visibility is reduced, but electrostatic discharge causes disconnection and performance degradation
Solution Approach 1:
By segmenting the electrode structure into multiple metal electrode blocks connected by transparent bridges, the patent creates multiple parallel current pathways. This segmentation distributes electrostatic discharge current across several routes, preventing any single thin metal bridge from breaking under the full electrostatic current load, thus reducing the harmful impact of electrostatic discharge.
Solution Approach 2:
The patent designs the electrode structure with transparent bridges that have sufficient cross-section and metal electrode blocks that provide alternative current pathways before electrostatic discharge occurs. This pre-designed redundancy acts as a cushioning mechanism, protecting the overall electrode structure from the harmful effects of electrostatic discharge by providing multiple fail-safe current conduction paths.
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 solution enhances the reliability of connections between electrode blocks, improves touch precision, and reduces power consumption by using metal electrodes with grid structures and transparent bridges, ensuring stable operation and minimal visibility impact.
Implementation Method 1
every two adjacent second electrode blocks along the first direction of the plurality of second electrode blocks are connected to each other via a bridge structure... the bridge structure and the plurality of second electrode blocks are arranged in different layers, the plurality of second electrode blocks is made of metal, and the bridge structure is transparent
Data Source
AI summary
A touch display panel includes first touch electrodes arranged in a first direction and extending along a second direction, second touch electrodes arranged in the second direction and extending along the first direction, and sub-pixels; each first touch electrode comprises first electrode blocks arranged in the second direction, every two adjacent first electrode blocks are connected to each other, each second touch electrode comprises second electrode blocks made of metal, every two adjacent second electrode blocks are connected to each other by a bridge structure which is transparent and in the same layer as the second electrode blocks, an orthographic projection of the second electrode block on a plane of the touch display panel is enclosed within an orthographic projection of the non-aperture portion of the sub-pixel on the plane. A touch display device includes the touch display panel.