OLED Display Device Multidimensional Pressure Sensing Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current capacitive touch technologies, such as force touch, are limited to three-dimensional sensing and face difficulties when applied to large-sized mobile devices, necessitating more advanced pressure sensing capabilities for enhanced user interaction.
Innovation Solution
A display device integrating an OLED display layer with a touch layer and a pressure sensing layer, featuring a plurality of electrodes and insulating layers, allows for multidimensional pressure sensing by varying electrode areas and shapes, enabling precise pressure detection and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force touch technology with gravity sensing devices is applied to large-sized mobile devices, then pressure sensing capability is improved, but device complexity and manufacturing difficulty increase significantly
Solution Approach 1:
The patent combines the pressure sensing layer with the display device structure, integrating multiple functions into a unified system. The pressure sensing layer includes first electrodes, second electrodes, and insulating layers that are laminated with the OLED display layer, creating a combined structure that performs both display and pressure sensing functions simultaneously, thereby reducing overall device complexity while maintaining advanced pressure sensing capabilities
Solution Approach 2:
The pressure sensing layer serves multiple functions: it detects pressure magnitude, determines touch position, and provides feedback for various touch gestures. The electrode structures are designed to work for both pressure sensing and display purposes, with the first electrodes opposite the cathode and second electrodes on different layers, enabling the system to perform multiple operations through a single integrated structure
2Device complexity
If simple three-dimensional pressure recognition is used, then device complexity is reduced, but pressure sensing precision and user interaction capability are limited
Solution Approach 1:
The patent transitions from simple three-dimensional pressure recognition to multidimensional pressure sensing by incorporating multiple electrode layers (first electrodes and second electrodes on different layers) and varying electrode areas. This dimensional expansion enables detection of pressure magnitude, position, and gesture type simultaneously, achieving high measurement precision while maintaining manageable device complexity through systematic structural design
3Measurement precision
If electrode areas are varied from edge to center, then pressure sensing precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements local quality by varying the areas of first electrodes and second electrodes from edge to center of the pressure sensing layer. Different electrode areas in different regions enable optimized pressure sensing precision for each zone, with larger electrodes at edges and smaller electrodes at the center, matching the typical touch interaction patterns and improving overall measurement precision while providing clear manufacturing guidelines for each region
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 multidimensional pressure sensing control, enhancing user experience by providing customizable and advanced touch interactions on large-sized mobile devices.
Implementation Method 1
the pressure sensing layer includes a plurality of first electrodes, the OLED display layer includes a cathode, and the plurality of first electrodes are opposite to the cathode
Data Source
AI summary
The present disclosure provides a display device including: an OLED display layer; and a touch layer and a pressure sensing layer disposed on the OLED display layer laminatedly, wherein the pressure sensing layer includes a plurality of first electrodes, the OLED display layer includes a cathode, and the plurality of electrodes are opposite to the cathode. The present disclosure integrates a pressure sensor in a display device, so that a multidimensional pressure sensing control may be achieved, and a customization may be implemented when needed.