In-cell Inductive Touch Substrate Segmented Coils
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Solution Overview
Problem
Inductive touch-control screens in prior art are thick and complex due to the use of flexible circuit boards, leading to cost waste and inefficiency.
Innovation Solution
An in-cell inductive touch-control display substrate is designed with first and second electrode layers reused to form electromagnetic inductive coils, reducing thickness and complexity by using bridge wires to connect inductive segments within the same layer, thereby integrating the touch-control functionality directly into the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an attached inductive touch-control plate with flexible circuit board is used, then the electromagnetic inductive coil can be disposed on the touch-control screen, but the thickness and wiring complexity of the touch-control screen increases
Solution Approach 1:
The patent merges the electromagnetic inductive coil structure with the existing electrode layers of the display substrate. The first and second electromagnetic inductive coils are integrated into the same layer as the first electrode layer, eliminating the need for separate attached touch-control plates and flexible circuit boards, thereby reducing wiring complexity and thickness
Solution Approach 2:
The first electrode layer serves dual functions: as the common electrode for display purposes and as the layer for disposing electromagnetic inductive coils for touch control. This multi-functionality reduces the need for additional layers and components, simplifying the overall structure
2Reliability
If an attached inductive touch-control plate with flexible circuit board is used, then the electromagnetic inductive coil can be disposed on the touch-control screen, but the manufacturing cost increases
Solution Approach 1:
The patent combines the touch control functionality with the existing display substrate structure, eliminating the need for separate attached plates and flexible circuit boards. This integration reduces the number of manufacturing steps and components, thereby lowering manufacturing costs
Solution Approach 2:
The patent extracts the electromagnetic inductive coil structure from the separate attached touch-control plate and relocates it directly into the display substrate's electrode layer, removing unnecessary intermediate components and reducing manufacturing complexity
3Reliability
If the first and second electromagnetic inductive coils cross each other, then complete loop structures can be formed, but the wiring complexity increases
Solution Approach 1:
The patent segments the electromagnetic inductive coils at crossing points, breaking continuous loops into multiple sections. The first and second electromagnetic inductive coils are broken into a plurality of electromagnetic inductive segments at the crossings, which are then connected through bridge wires, simplifying the wiring arrangement
Solution Approach 2:
The patent introduces bridge wires as intermediary elements to connect the segmented electromagnetic inductive segments at crossing points. These bridge wires facilitate electrical connection between segments while maintaining the electromagnetic inductive functionality, reducing wiring complexity
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 approach reduces the thickness and complexity of the inductive touch-control screen, saving manufacturing costs and enhancing the efficiency of the touch-control display device.
Implementation Method 1
a second electrode layer insulated from the first electrode layer to form an electric field
Implementation Method 2
a multitude of first electromagnetic inductive coils extending in the row direction and forming a multitude of first loops and a multitude of second electromagnetic inductive coils extending in the column direction and forming a multitude of second loops
Data Source
AI summary
The invention discloses an in-cell inductive touch-control display substrate, an inductive touch-control screen and a touch-control display device. The in-cell inductive touch-control display substrate includes: a first electrode layer; a second electrode layer insulated from the first electrode layer to form an electric field; first electromagnetic inductive coils extending in the row direction and forming loops and second electromagnetic inductive coils extending in the column direction and forming loops, disposed in the same layer as the first electrode layer. The first electromagnetic inductive coils or the second electromagnetic inductive coils are broken into a plurality of electromagnetic inductive segments at the crossings of the first and second electromagnetic inductive coils. Bridge wires disposed in the same layer as the second electrode layer electrically connect the electromagnetic inductive segments of the first electromagnetic inductive coils or the second electromagnetic inductive coils.