Touch Display Device Spacer Area Routing
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Solution Overview
Problem
Existing touch display devices face challenges in implementing touch sensors without compromising the image display performance, as touch electrodes and routing lines often overlap with light-emitting areas, affecting image quality.
Innovation Solution
The implementation of a touch display device with a touch sensor structure that includes light-emitting elements, an encapsulation layer, touch electrodes, touch routing lines, and spacers, where the touch electrodes and routing lines are strategically positioned on areas corresponding to spacers, avoiding the light-emitting areas to minimize performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch electrodes and routing lines are added to the display panel, then touch sensing functionality is improved, but image display performance deteriorates due to overlap with light-emitting areas
Solution Approach 1:
The patent applies dimensionality change by utilizing the vertical dimension (different layers) to resolve the spatial conflict. Touch electrodes are placed on the encapsulation layer (upper layer) while light-emitting elements are in the lower layers, allowing both to coexist without overlapping in the horizontal plane. This vertical stacking enables touch sensing functionality without compromising image display performance.
Solution Approach 2:
The patent segments the display panel into distinct functional zones: light-emitting areas for image display and touch electrode areas for sensing. By dividing the panel layout and assigning different layers to different functions, the design eliminates interference between imaging and touch sensing components while maintaining both functionalities.
2Adaptability or versatility
If touch sensor structure is implemented on the display panel, then touch sensing performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the touch sensor structure with the existing display panel manufacturing process. The encapsulation layer, which is already part of the display device structure, serves dual purposes: protecting underlying components and providing a substrate for touch electrodes. This integration eliminates the need for separate manufacturing steps and reduces overall device complexity.
Solution Approach 2:
The encapsulation layer is designed to serve multiple functions: it acts as a protective barrier for the light-emitting elements and simultaneously serves as the substrate for forming touch electrodes. This multi-functionality reduces the number of separate components and simplifies the overall device structure, making manufacturing less complex.
3Illumination intensity
If touch electrodes are positioned to avoid light-emitting areas, then image display performance is maintained, but touch sensing area is reduced
Solution Approach 1:
By transitioning from a two-dimensional layout to a three-dimensional structure with vertical stacking, the patent resolves the area conflict. Touch electrodes can be positioned on the encapsulation layer without occupying horizontal space over the light-emitting areas, thereby maintaining full touch sensing coverage while preserving image display quality.
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 approach allows for improved touch sensing performance without degrading the image display performance, as the touch sensor structure is designed to reduce interference with the light-emitting areas, maintaining both functionality and image quality.
Implementation Method 1
can sense the touch of the user by detecting a change of a capacitance generated when the user touches the display panel
Implementation Method 2
a plurality of light-emitting elements on an active area of a display panel
Data Source
AI summary
A touch display device is disclosed. The touch display device includes a touch electrode and a touch routing line that are disposed on an area that is different from an area where a spacer is disposed. Thus, a touch sensing function can be provided in the touch display device while reducing an influence that a touch sensor structure affects a viewing angle of an image.