Stacked Touch-Control Electrode Blocks and Traces for Low Parasitic Capacitance
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Solution Overview
Problem
The high cost of touch-control display apparatuses is a significant issue due to the expensive components used in their construction, particularly in relation to the drive integrated circuit (IC) required for touch-control panels.
Innovation Solution
The design incorporates touch-control electrode blocks and traces with stacked conductive and trace layers, where each layer is electrically connected, reducing resistance and allowing the same drive IC to be used as the display panel, thereby minimizing costs and volume while reducing parasitic capacitance for improved touch-control performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touch-control panel uses a dedicated touch-control drive IC, then the touch-control performance is improved, but the cost and volume of the display apparatus increase
Solution Approach 1:
The display panel drive IC is designed to perform both display driving functions and touch-control driving functions. The same IC chip integrates multiple drive capabilities, allowing it to control both the display panel and the touch-control electrode blocks without requiring a separate dedicated touch-control drive IC. This multi-functional approach reduces component count, cost, and volume while maintaining touch-control performance.
Solution Approach 2:
The patent combines the touch-control drive functionality with the display drive IC into a single integrated component. By merging these two previously separate functions into one IC, the system eliminates the need for a dedicated touch-control drive IC, thereby reducing overall device complexity, cost, and volume while preserving both display and touch-control operations.
2Ease of manufacture
If the touch-control electrode blocks use single-layer conductive structures, then the manufacturing process is simpler, but the resistance is high requiring stronger drive capability
Solution Approach 1:
The patent transitions from single-layer conductive structures to multi-layer stacked conductive structures for the touch-control electrode blocks. By adding vertical layering (moving from 1D to 2D/3D arrangement), the design reduces electrical resistance through increased conductive path area while maintaining manufacturing feasibility through standardized thin-film deposition processes for multiple layers.
Solution Approach 2:
The patent employs composite conductive structures consisting of multiple conductive layers stacked together with insulating layers in between. This composite approach combines multiple conductive material layers to achieve lower overall resistance while using standard insulating materials, creating a multi-layer composite structure that balances manufacturing simplicity with improved electrical performance.
3Ease of manufacture
If the touch-control traces use single-layer structures, then the manufacturing process is simpler, but the resistance is high affecting touch sensitivity
Solution Approach 1:
The patent applies multi-layer stacking to the touch-control traces, transitioning from single-layer to multi-layer conductive trace structures. This vertical dimensionality addition increases the effective conductive cross-section, reducing trace resistance and improving signal quality for touch detection, thereby enhancing touch sensitivity without complicating the manufacturing process beyond standard multi-layer thin-film techniques.
Solution Approach 2:
The patent creates composite trace structures by stacking multiple conductive layers with insulating layers between them. This composite construction reduces the overall resistance of the touch-control traces while using conventional insulating materials and deposition processes, achieving improved touch sensitivity through enhanced electrical conductivity without introducing complex manufacturing steps.
4Adaptability or versatility
If the conductive layers and trace layers are disposed on different layers, then the routing flexibility is improved, but the parasitic capacitance increases reducing touch-control accuracy
Solution Approach 1:
The patent utilizes vertical layering to separate conductive layers and trace layers into different horizontal planes (stacked configuration). By arranging corresponding layers on the same horizontal level and using vertical stacking for separation, the design reduces the overlapping area between conductive and trace structures, thereby minimizing parasitic capacitance while preserving routing flexibility through the multi-layer architecture.
Solution Approach 2:
The patent employs a composite layered structure where insulating layers are positioned between conductive layers and trace layers. This composite construction with alternating conductive and insulating layers physically separates charge-carrying structures, reducing electrostatic coupling and parasitic capacitance between conductive blocks and traces, thus improving touch-control accuracy while maintaining design flexibility.
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 lowers the cost and volume of touch-control panels and display apparatuses, enhances touch-control sensitivity, and reduces parasitic capacitance, leading to a more efficient and cost-effective touch-control solution.
Implementation Method 1
the first conductive layer and the second conductive layer of the each touch-control electrode block are electrically connected. The multiple touch-control traces are configured to input a drive signal to the multiple touch-control electrode blocks, each touch-control trace includes a first trace layer and a second trace layer disposed in a stacked manner, a second insulating layer is disposed between the first trace layer and the second trace layer, and the first trace layer and the second trace layer of the each touch-control trace are electrically connected
Implementation Method 2
The first conductive layer and the first trace layer are disposed on a same layer, the second conductive layer and the second trace layer are disposed on a same layer, and the first insulating layer and the second insulating layer are disposed on a same layer, so that the facing area of the touch-control electrode blocks and the touch-control traces connected to other touch-control electrode blocks is greatly reduced, whereby the parasitic capacitance between the touch-control electrode blocks and the touch-control traces connected to other touch-control electrode blocks is significantly reduced
Data Source
AI summary
A touch-control panel and a touch-control display apparatus. The touch-control panel includes multiple touch-control electrode blocks and multiple touch-control traces. The touch-control traces are configured to input a drive signal to the touch-control electrode blocks. Each touch-control electrode block includes a first conductive layer and a second conductive layer disposed in a stacked manner, a first insulating layer is disposed between the first conductive layer and the second conductive layer, and the first conductive layer and the second conductive layer are electrically connected. Each touch-control trace includes a first trace layer and a second trace layer disposed in a stacked manner, a second insulating layer is disposed between the first trace layer and the second trace layer, and the first trace layer and the second trace layer are electrically connected.