Pressure Sensing Wiring Overlap in Thin Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices face challenges in integrating effective pressure sensing capabilities within a thin and aesthetically pleasing design, particularly in reducing the non-display area while maintaining sensitivity and functionality.
Innovation Solution
The integration of a pressure sensing module between the display panel and the window, utilizing a voltage line and pressure sensing wiring that overlap a light-blocking pattern layer, along with an elastic member to form a capacitance, allows for precise pressure detection and reduced bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensing module is integrated between the display panel and window, then pressure sensitivity is enhanced, but the device complexity increases
Solution Approach 1:
The patent combines the pressure sensing function with the existing touch panel structure by integrating the pressure sensing module between the display panel and window. The voltage line and pressure sensing wiring are merged into a single capacitive sensing system, allowing dual functionality (touch and pressure sensing) without adding separate complex mechanical pressure sensors.
Solution Approach 2:
The touch panel structure is designed to serve multiple functions: it acts as both a touch event detector and a pressure sensor. The same voltage line and pressure sensing wiring detect both touch position and pressure magnitude, eliminating the need for separate dedicated pressure sensing components and reducing overall device complexity.
2Area of stationary object
If the non-display area is reduced, then the display area is increased, but the integration of pressure sensing components becomes more difficult
Solution Approach 1:
The patent moves pressure sensing components from the traditional edge/bezel area into the vertical stacking dimension by placing the pressure sensing module between the display panel and window. This allows pressure sensing functionality to be integrated within the thin profile of the display device without requiring additional lateral space in the non-display area.
Solution Approach 2:
The pressure sensing wiring and voltage line are nested within the existing touch panel structure. The pressure sensing module is embedded between the display panel and window, utilizing the existing structural space rather than requiring additional external components or increased non-display area.
3Adaptability or versatility
If physical buttons are replaced with pressure sensing, then design freedom is increased, but the reliability of button function may be reduced
Solution Approach 1:
The patent replaces traditional mechanical push buttons with a capacitive pressure sensing system. The voltage line and pressure sensing wiring detect pressure through electrical field changes rather than mechanical contact, eliminating moving parts while maintaining reliable pressure detection functionality through electronic sensing.
Solution Approach 2:
The pressure sensing module uses the same electrical infrastructure (voltage line and pressure sensing wiring) already present in the touch panel system. The existing capacitive sensing circuitry serves dual purposes for both touch detection and pressure measurement, eliminating the need for separate dedicated button mechanisms.
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 enhances pressure sensitivity, reduces the non-display area, and replaces physical buttons, offering a thinner and more cost-effective display device with increased design freedom.
Implementation Method 1
An elastic member is disposed between the pressure sensing wiring and the voltage line
Implementation Method 2
A capacitance is formed between the voltage line and the pressure sensing wiring
Data Source
AI summary
A display device includes a display panel configured to display an image. A window laces the display panel and includes a transparent display area configured to transmit the image displayed on the display panel therethrough. A non-display area at least partially surrounds the display area. A light-blocking pattern layer is disposed on the non-display area of the window. A touch member is disposed between the display panel and the window and includes a voltage line. A pressure sensing wiring is disposed between the touch member and the window and at least partially overlaps the voltage line. The voltage line and the pressure sensing wiring overlap the light-blocking pattern layer.