Side-Mounted Pressure Sensor Layout for Compact Display Input
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Solution Overview
Problem
Existing display devices face challenges in integrating pressure sensors efficiently, particularly in reducing the occupied area and enhancing the sensing capabilities while maintaining the functionality of touch panels and physical input substitution.
Innovation Solution
A display device design that incorporates a pressure sensor between the display panel and a lower bracket, with a specific substrate and electrode configuration, allowing for pressure sensing on the side surface and embedding the sensor in a recessed surface portion, enabling efficient pressure detection and reducing the overall sensor area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pressure sensor is mounted on the display device to enable pressure sensing functionality, then the sensing capability is improved, but the area occupied by the pressure sensor increases
Solution Approach 1:
The pressure sensor is relocated from the traditional planar mounting position to the side surface of the display device. Specifically, the pressure sensor is disposed on the lower bracket's side surface, utilizing the vertical dimension and side surface area rather than consuming additional planar display area. This dimensional transition allows pressure sensing functionality to be added without reducing the display area or requiring larger device footprint.
2Ease of manufacture
If the pressure sensor is disposed between the display panel and lower bracket, then the integration is improved, but the manufacturing complexity increases
Solution Approach 1:
The pressure sensor is divided into distinct functional components: a first substrate facing the lower bracket, a first pressure sensing layer, a first driving electrode, and a first sensing electrode. This segmentation allows each component to be optimized and manufactured separately before assembly, simplifying the overall manufacturing process despite the complex spatial arrangement.
Solution Approach 2:
The pressure sensor components are nested within the lower bracket structure. The lower bracket includes a recessed surface portion that accommodates the pressure sensor, with the sensor embedded in a compact configuration where the substrate, pressure sensing layer, and electrodes are stacked or closely positioned, maximizing space utilization while maintaining manufacturing feasibility.
3Measurement precision
If the pressure sensor uses a substrate and electrode configuration with gaps, then the sensing precision is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The first substrate serves as an intermediary component that provides mechanical support and electrical isolation. The substrate includes precisely positioned gaps that define the sensing regions, and these gaps are formed with controlled dimensions during substrate manufacturing. The substrate acts as a mediator between the pressure sensing layer and the external environment, enabling precise gap positioning through standardized substrate fabrication processes.
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 allows for effective pressure sensing without compromising the display area, providing a compact and functional solution for replacing physical buttons and enhancing user interaction with the display device.
Implementation Method 1
the pressure sensor includes a first substrate facing the second side surface of the lower bracket, a first pressure sensing layer disposed between the first substrate and the second side surface of the lower bracket, a first driving electrode disposed between the first pressure sensing layer and the second side surface of the lower bracket, and a first sensing electrode spaced apart from the first driving electrode, and a gap is present between the first pressure sensing layer, and the first driving electrode and the first sensing electrode
Data Source
AI summary
A display device includes a display panel; a pressure sensor disposed on the display panel; and a lower bracket. The pressure sensor is disposed between the display panel and the lower bracket and is disposed on the lower bracket. The pressure sensor includes a first substrate, a first pressure sensing layer disposed between the first substrate and the lower bracket, a first driving electrode disposed between the first pressure sensing layer and the lower bracket, and a first sensing electrode spaced apart from the first driving electrode. A gap is present between the first pressure sensing layer, and the first driving electrode and the first sensing electrode.