Window Sensing Portion With Light Shielding Member
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Solution Overview
Problem
Current display devices with touch panels face challenges in accurately detecting touch positions and pressures across non-display areas, particularly due to limitations in sensing technologies integrated within the non-display regions.
Innovation Solution
The display device incorporates a non-display area with a sensing portion and a non-sensing portion, featuring a light shielding member and multiple conductive layers stacked with insulating layers, which function as pressure sensors to detect touch inputs and pressures by varying the distance between conductive electrodes, enhancing sensitivity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is integrated into the non-display area, then touch sensing capability is improved, but manufacturing complexity increases due to the need for additional sensing structures
Solution Approach 1:
The window structure serves multiple functions: it acts as both a structural support element and a touch sensing component. The window includes conductive layers that function as electrodes for capacitance-based touch sensing, eliminating the need for separate touch panel structures in the non-display area.
Solution Approach 2:
The touch sensing function is merged with the window structure by integrating conductive layers directly into the window. This combination reduces the number of separate components and simplifies the overall device architecture while maintaining touch sensing capability in the non-display area.
2Measurement precision
If light shielding members are added to the non-display area, then touch detection accuracy is improved, but device complexity increases
Solution Approach 1:
A light shielding member is introduced as an intermediary element between the conductive layers. This member prevents parasitic capacitance effects from underlying structures while allowing the touch sensing function to operate accurately. The light shielding member acts as a mediator that blocks unwanted electrical interference without obstructing the touch sensing mechanism.
3Measurement precision
If multiple conductive layers are stacked with insulating layers, then pressure sensing sensitivity is improved, but manufacturing complexity increases
Solution Approach 1:
The window is divided into multiple conductive layers (first conductive layer, second conductive layer, third conductive layer, fourth conductive layer) separated by insulating layers. This segmentation creates multiple sensing interfaces that can independently detect touch and pressure events, enhancing overall sensing sensitivity through layered detection.
Solution Approach 2:
The sensing mechanism transitions from a single-plane detection to a multi-layered three-dimensional structure. By stacking conductive layers at different heights with insulating layers in between, the system creates vertical sensing zones that enhance pressure detection capability through depth-based measurement.
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 precise detection of touch positions and pressures, improving user input recognition and enhancing the overall touch sensitivity across the display device, particularly in non-display areas.
Implementation Method 1
The non-display area of the window includes a light shielding member
Implementation Method 2
The sensing portion includes a first conductive layer and a second conductive layer stacked on the first conductive layer with the first light shielding member interposed therebetween
Data Source
AI summary
A display device includes a display panel having a display portion. A window is disposed above the display portion. The window includes a display area, on which a screen is displayed by the display portion, and a non-display area, disposed around the display area. The non-display area of the window includes a sensing portion and a non-sensing portion. The non-display area of the window includes a first light shielding member. The sensing portion includes a first conductive layer and a second conductive layer stacked on the first conductive layer with the first light shielding member interposed therebetween.