Layered Input Sensing Electrodes for Touch and Pen Detection
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Solution Overview
Problem
The use of separate touch panels and digitizers in display devices increases the thickness of the devices, necessitating a solution that integrates both functionalities without adding bulk.
Innovation Solution
An input sensing part is designed with a first and second sensing electrode, each electrically insulated and crossing each other, and pen sensing electrodes on different layers, allowing for both touch and pen input detection without increasing device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate touch panels and digitizers are used, then touch and pen input detection can be performed, but device thickness increases
Solution Approach 1:
The patent combines touch panel and digitizer functionalities into a single integrated input sensing part. The sensing electrodes for touch detection and pen sensing electrodes for digitizer detection are integrated on the same substrate, allowing both functions to coexist without requiring separate components, thereby reducing device thickness while maintaining versatility
Solution Approach 2:
The patent uses multi-layer stacking to arrange different sensing electrodes on different layers of the same substrate. By utilizing the vertical dimension (layer stacking) rather than horizontal placement, the patent enables both touch and pen sensing functionalities within a compact thickness, effectively solving the contradiction between functionality and device thickness
2Device complexity
If multiple sensing electrodes are integrated on the same layer, then component count is reduced, but electrical insulation becomes difficult to maintain
Solution Approach 1:
The patent transitions from planar arrangement to three-dimensional layer stacking. By placing different sensing electrodes on different layers separated by insulating layers, the patent maintains electrical insulation between electrodes while integrating multiple functionalities. This vertical separation allows multiple electrodes to coexist without direct contact, preserving reliability while reducing component count
Solution Approach 2:
The patent introduces insulating layers as intermediary elements between different sensing electrodes on adjacent layers. These insulating layers act as mediators that prevent electrical contact between electrodes that need to be electrically isolated, thereby maintaining reliability while enabling integration of multiple electrodes on the same substrate
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 enables simultaneous touch and pen input detection, reducing the need for separate components and maintaining device thickness.
Implementation Method 1
the first-2 pen sensing electrode is disposed on a layer that is different from that on which the first sensing electrode and the first-1 pen sensing electrode are disposed, and overlapping at least a portion of the first sensing electrode, in a plan view
Data Source
AI summary
An input sensing part includes a first sensing electrode. A second sensing electrode is electrically insulated from the first sensing electrode and crosses the first sensing electrode. A first-1 pen sensing electrode is adjacent to the first sensing electrode, is electrically insulated from the second sensing electrode, and crosses the second sensing electrode. A second-1 pen sensing electrode is adjacent to the second sensing electrode, is electrically insulated from the first sensing electrode and the first-1 pen sensing electrode, and crosses the first sensing electrode and the first-1 pen sensing electrode. A first-2 pen sensing electrode is disposed on a layer that is different from that on which the first sensing electrode and the first-1 pen sensing electrode are disposed, and overlaps a portion of the first sensing electrode, a plan view.