Display Device Protrusion Overlap Enhances Pressure Sensing
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Solution Overview
Problem
Current display devices with touch-type input processing lack sufficient pressure sensing sensitivity, limiting their ability to provide diverse user interfaces and accurately detect pressure variations.
Innovation Solution
A display device design featuring a frame with protrusions, a display panel with planar and curved portions, and a pressure sensing unit comprising first and second electrodes with variable resistor members, where the protrusions overlap regions of electrode overlap to enhance pressure detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensing unit is disposed between the frame and the display panel, then pressure sensing capability is provided, but pressure sensing sensitivity is insufficient
Solution Approach 1:
The patent applies local quality by positioning protrusions at specific locations on the frame that correspond to curved portions of the display panel. These protrusions create localized contact points that concentrate pressure forces, enhancing the sensitivity of pressure sensing in specific regions rather than uniformly across the entire sensing unit.
Solution Approach 2:
The patent utilizes curvature by configuring the display panel with curved portions that overlap with the protrusions on the frame. This curvature design allows the panel to naturally deform under pressure, amplifying the pressure signal detected by the sensing unit and improving overall sensing sensitivity.
2Measurement precision
If protrusions are added to the frame to overlap electrode regions, then pressure detection sensitivity is enhanced, but device complexity increases
Solution Approach 1:
The patent merges the pressure sensing function with the existing frame structure by integrating protrusions directly into the frame. This combination eliminates the need for separate sensing mechanisms, enhancing pressure detection sensitivity while avoiding additional complex components.
Solution Approach 2:
The frame structure serves multiple functions: it provides structural support, positions the display panel, and enables pressure sensing through the protrusions. This multi-functionality reduces the need for separate dedicated pressure sensing components, thereby limiting the increase in device complexity.
3Measurement precision
If the pressure sensing unit overlaps curved portions of the display panel, then sensing accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the protrusions on the frame at specific positions that correspond to curved portions of the display panel before assembly. This pre-positioning ensures proper alignment with the pressure sensing electrodes, improving sensing accuracy while reducing the precision requirements during final assembly.
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
The design allows for accurate and sensitive detection of pressure applied to the display device, enabling a wider range of user interfaces and improved user experiences by effectively calculating pressure magnitude and location.
Implementation Method 1
a pressure sensing unit disposed between the frame and the display panel that includes a plurality of first electrodes and a plurality of second electrodes disposed in a different layer from the first electrodes
Data Source
AI summary
A display device includes: a frame that includes a plurality of protrusions; a display panel disposed on the frame that includes a planar portion and a curved portion; a pressure sensing unit disposed between the frame and the display panel that overlaps the curved portion and that includes a plurality of first electrodes and a plurality of second electrodes disposed in a different layer; and a pressure sensing drive unit connected to the plurality of first electrodes and the plurality of second electrodes. Any one of the plurality of second electrodes at least partially overlaps any one of the plurality of first electrodes. At least one of the plurality of protrusions overlaps a region where one of the plurality of first electrodes and one of the plurality of second electrodes overlap each other.