Dual-Sided Display Structure With Integrated Touch Pressure Sensing
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Solution Overview
Problem
Current display apparatuses lack the ability to provide visual information in multiple directions and simultaneously measure touch pressure effectively.
Innovation Solution
A display apparatus with a first substrate having a front and rear surface, featuring a first display layer for emitting light in the front direction, a second display layer for emitting light in the rear direction, and a pressure sensor on the rear surface, which includes an elastic layer with conductivity and conductive patterns for sensing touch pressure, allowing for deformation and capacitance changes to determine pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-direction display structure is used, then the device complexity is low, but the display apparatus cannot provide visual information in multiple directions
Solution Approach 1:
The display apparatus is segmented into multiple independent display layers: a first display layer for front-direction display and a second display layer for rear-direction display. Each layer can operate independently, allowing the system to provide visual information in multiple directions without requiring a completely new display architecture.
Solution Approach 2:
The invention transitions from a single-plane (2D) display structure to a multi-plane (3D) structure by stacking display layers on different surfaces of the substrate. This dimensional change enables light emission in opposite directions (front and rear) simultaneously, achieving multi-directional display capability.
2Measurement precision
If no pressure sensing mechanism is added, then the device complexity remains low, but the apparatus cannot measure touch pressure
Solution Approach 1:
The pressure sensing function is merged with the existing display layer structure. The elastic layer, which is part of the display assembly, serves dual purposes: maintaining the structural integrity of the display and sensing touch pressure through deformation. This integration avoids adding a completely separate sensing system.
Solution Approach 2:
The elastic layer is designed to perform multiple functions: it provides mechanical support for the display structure, enables touch pressure sensing through deformation, and facilitates capacitance changes for pressure measurement. This multi-functionality reduces the need for additional dedicated components.
3Adaptability or versatility
If an elastic layer with conductive patterns is added for pressure sensing, then touch pressure measurement is enabled, but the device complexity increases
Solution Approach 1:
Conductive patterns are selectively placed within the elastic layer at specific locations where pressure sensing is required. Rather than making the entire elastic layer conductive or adding conductive elements everywhere, the conductive patterns are localized to functional areas, reducing material usage and structural complexity.
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 the display apparatus to provide visual information in various directions while accurately measuring touch pressure, enhancing user interaction and functionality.
Implementation Method 1
an elastic layer disposed between the first substrate and the second display layer, the elastic layer being configured to be deformed by the pressure
Implementation Method 2
The pressure sensor may further include: a first conductive pattern disposed between the first substrate and the elastic layer; and a second conductive pattern disposed between the elastic layer and the second display layer
Data Source
AI summary
A display apparatus includes: a first substrate having a front surface and a rear surface; a first display layer disposed on the front surface of the first substrate, the first display layer configured to emit light in a front direction; a second display layer disposed on the rear surface of the first substrate, the second display layer configured to emit light in a rear direction; and a pressure sensor disposed on the rear surface of the first substrate, the pressure sensor configured to sense a pressure of a touch of a user.