Sensing Panel Bridge Structure for Higher Display Visibility
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Solution Overview
Problem
Display devices face challenges in increasing visibility and reducing interference between the optical path provided by the display device and the conductive structure forming the sensing panel, which affects light emission efficiency.
Innovation Solution
A sensing panel design featuring a first insulating layer with a sensor base layer, a first conductive pattern layer with a bridge, a second insulating layer, and a second conductive pattern layer with a valley bridge, where the second conductive pattern layer is in direct contact with the upper surface of the first insulating layer, and a passivation layer covers the second conductive pattern layer, enhancing visibility and light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive structure is formed in the sensing panel, then sensing function is achieved, but interference with the optical path increases and visibility decreases
Solution Approach 1:
The conductive structure is transformed from a planar configuration to a three-dimensional configuration by forming bridges that extend in the vertical dimension. The first bridge rises from the first substrate through the first insulating layer, and the second bridge rises from the second substrate through the second insulating layer, creating a立体 structure that reduces planar interference with the optical path while maintaining electrical connectivity for sensing function
Solution Approach 2:
Insulating layers are introduced as intermediary structures between the conductive bridges and the optical path. The first insulating layer surrounds the first bridge, and the second insulating layer surrounds the second bridge, acting as mediators that electrically isolate the conductive structures from the substrates while allowing optical signals to pass through with minimal interference, thus maintaining both sensing function and visibility
2Reliability
If conductive structures are present in the sensing panel, then electrical connectivity is achieved, but light emission efficiency is reduced
Solution Approach 1:
The conductive bridges are configured to extend vertically through insulating layers rather than horizontally across the display area. This vertical orientation in the third dimension minimizes the horizontal footprint of the conductive structures, reducing their interference with light emission from the display panel while maintaining electrical connectivity between sensing electrodes
Solution Approach 2:
The insulating layers act as intermediary structures that allow light to pass through with minimal absorption or scattering while providing electrical isolation. These mediators enable the conductive bridges to maintain electrical connectivity without directly interfering with the optical path, thus preserving light emission efficiency while achieving reliable electrical connection
Data Source
AI summary
A sensing panel includes a first insulating layer comprising a sensor base layer. A first conductive pattern layer is disposed on the sensor base layer and includes a bridge in an area connected to a contact portion. A second insulating layer is disposed on the first conductive pattern layer. A second conductive pattern layer is connected to the first conductive pattern layer in the contact portion and includes a valley bridge in an area where the second insulating layer is removed. A passivation layer covers the second conductive pattern layer.