Touch Display Device Layered Touch Lines Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing touch display devices face challenges in maintaining a high aperture ratio and transmittance of subpixels due to the presence of touch electrodes and lines on the active area of the display panel, which reduces their performance.
Innovation Solution
The proposed solution involves optimizing the arrangement and structure of touch electrodes and lines on the display panel, including using a mesh shape for the touch electrode and alternately layering touch lines to minimize their area and overlap with emission areas, thereby reducing the reduction in aperture ratio and transmittance, while enhancing touch sensitivity and allowing for a larger touch display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch electrodes and touch lines are disposed on the active area of the display panel, then touch sensitivity is improved, but aperture ratio and transmittance of subpixels are reduced
Solution Approach 1:
The patent applies dimensionality change by moving touch lines from the active area to the non-active area of the display panel, and by stacking touch electrodes and touch lines on different layers. This spatial reorganization allows touch functionality to be maintained while preserving the aperture ratio and transmittance in the active display region.
Solution Approach 2:
The patent implements nesting by placing touch electrodes and touch lines on different layers of the display panel structure. The touch electrode is disposed on one layer while the touch line is disposed on another layer, allowing both components to coexist without occupying the same spatial footprint, thereby maintaining high aperture ratio.
2Adaptability or versatility
If touch electrodes and touch lines are disposed on the active area of the display panel, then touch functionality is enabled, but transmittance of subpixel is reduced
Solution Approach 1:
The patent relocates touch lines from the active area to the non-active area and utilizes multi-layer stacking to separate touch components vertically. This dimensional reorganization ensures that touch functionality is preserved while light transmission through the active area is not obstructed, maintaining high transmittance.
Solution Approach 2:
The patent extracts the touch line from the active area and places it in the non-active area, separating the touch signal transmission function from the light-emitting function. This extraction eliminates the obstruction of light by touch lines in the active region, thereby maintaining high transmittance.
3Measurement precision
If multiple touch lines are disposed on the display panel, then touch sensitivity is enhanced, but the area occupied by touch lines increases
Solution Approach 1:
The patent utilizes multi-layer stacking to arrange multiple touch lines vertically on different layers rather than horizontally adjacent on the same layer. This dimensional arrangement allows multiple touch lines to coexist without increasing the planar area occupied, while still providing enhanced touch sensitivity through increased touch line coverage.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Embodiments of the present disclosure are related to a touch display device (100) comprising a plurality of touch lines with a plurality of first line parts (TLa) disposed on a first sensor layer and a plurality of second line parts (TLb) disposed on a second sensor layer, at least portions of different touch lines (TL) can be disposed to overlap each other, thus a plurality of touch lines (TL) can be disposed while reducing or minimizing a reduction of an aperture ratio or a transmittance of a subpixel due to an arrangement of the touch line. Accordingly, a touch sensitivity can be enhanced by further disposing touch electrodes (TE), or the touch display device having a large area with many channels can be implemented easily by further disposing touch lines (TL).