Touch Display Device 3D Pressure Sensing Electrode Integration
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Solution Overview
Problem
Current touch display devices can only sense touch position, lacking the ability to differentiate touch pressure, which limits their operational modes and user interaction.
Innovation Solution
Incorporating a pressure sensing electrode layer parallel to a multi-function electrode layer with a changeable gap between them, allowing the device to sense touch pressure in addition to position, enabling 3D touch capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single touch sensing function is used, then the device structure remains simple, but the operational modes are limited
Solution Approach 1:
The multi-function electrode layer serves dual purposes: it acts as a common electrode for the display medium layer and simultaneously functions as a touch sensing electrode. This integration allows the device to maintain simple structure while enabling both display and touch sensing operations, resolving the contradiction between versatility and device complexity
Solution Approach 2:
The patent combines the common electrode of the display medium layer with the touch sensing electrode into a single multi-function electrode layer. By merging these two functional elements, the device achieves diversified operational modes without increasing structural complexity, as the same physical layer performs multiple functions
2Adaptability or versatility
If only touch position sensing is implemented, then the device structure remains simple, but user interaction is limited
Solution Approach 1:
The multi-function electrode layer simultaneously serves as a common electrode for display operation and as a touch sensing electrode for both position and pressure sensing. This multi-functionality enables diversified touch sensing operations without adding separate touch elements, thus avoiding increased device complexity
Solution Approach 2:
The patent merges the common electrode function with touch sensing function into a single integrated layer. This combination allows the device to detect both touch position and touch pressure using the same physical structure, enhancing user interaction capabilities without complicating the device architecture
3Measurement precision
If separate touch elements are added for pressure sensing, then touch pressure detection is enabled, but device thickness and volume increase
Solution Approach 1:
The patent combines the pressure sensing function with the existing display electrode structure. The multi-function electrode layer serves as both the common electrode for display and the sensing electrode for pressure detection, eliminating the need for separate touch elements and thereby avoiding increased device volume
Solution Approach 2:
The multi-function electrode layer performs multiple functions simultaneously: it acts as a common electrode for display operation and as a sensing electrode for detecting both touch position and touch pressure. This multi-functionality enables precise touch pressure detection without requiring additional separate components that would increase device volume
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
Enables diversified touch sensing operations by detecting touch pressure, enhancing user interaction with the device through additional sensing modes without requiring separate touch elements, thus reducing thickness and volume.
Implementation Method 1
a changeable gap is formed between the pressure sensing electrode layer and the multi-function electrode layer
Data Source
AI summary
A touch display device including a first substrate, a second substrate, a display medium layer, a pixel array structure and a pressure sensing electrode layer is provided. The display medium layer is disposed between the first substrate and the second substrate. The pixel array structure is disposed between the second substrate and the display medium layer and includes a plurality of pixel electrodes and a multi-function electrode layer overlapping the pixel electrodes. The pressure sensing electrode layer is parallel to the multi-function electrode layer and a changeable gap is formed between the pressure sensing electrode layer and the multi-function electrode layer. The touch display device capable of 3D touch is provided.