Touch Electrode Mesh Layout to Avoid Pixel Opening Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch electrode structures in display panels, particularly in OLED displays, face issues such as metal lines obstructing pixel openings, leading to cross-color interference and reduced display quality due to non-uniform sub-pixel spacing, which complicates manufacturing and affects display performance.
Innovation Solution
The solution involves arranging metal mesh lines outside pixel opening regions and configuring the touch electrode structure to avoid interference with the pixel opening regions, and configuring the pixel electrode structure to avoid interference with the pixel electrode structure to avoid interference with the pixel electrode structure to avoid interference with the pixel opening regions, and configuring the touch electrode structure to cover only the pixel separation regions, ensuring metal lines are spaced adequately from pixel openings, thus improving display quality and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If metal lines are arranged to cover pixel opening regions for touch electrode structure, then touch sensitivity is improved, but display quality deteriorates due to cross-color interference and light obstruction
Solution Approach 1:
The pixel array is divided into pixel opening regions and pixel separation regions. Metal lines are segmented to be arranged only in pixel separation regions, avoiding pixel opening regions. This spatial segmentation resolves the contradiction by allowing touch electrodes to exist without interfering with light emission from sub-pixels.
Solution Approach 2:
Different regions are assigned different functions: pixel opening regions are optimized for light emission (display quality), while pixel separation regions are optimized for electrode placement (touch sensitivity). This local differentiation allows each region to perform its primary function without compromising the other.
2Object-affected harmful factors
If metal lines are placed in pixel separation regions to avoid pixel openings, then display quality is improved, but touch electrode coverage is reduced affecting sensitivity
Solution Approach 1:
The touch electrode structure is extended into the third dimension by adding multiple stacked layers. This allows sufficient electrode coverage and sensitivity while keeping each layer's metal lines confined to pixel separation regions, maintaining display quality. The vertical stacking compensates for the restricted horizontal placement area.
Solution Approach 2:
Multiple metal mesh layers are combined to form a complete touch electrode structure. Each layer contributes to the overall electrode coverage, and their combined effect provides sufficient touch sensitivity even when individual layers are restricted to pixel separation regions only.
3Ease of manufacture
If sub-pixel spacing is made non-uniform to accommodate metal lines, then manufacturing complexity increases, but touch electrode structure can be implemented
Solution Approach 1:
The display panel is segmented into pixel opening regions with uniform sub-pixel spacing (for display quality) and pixel separation regions (for metal line placement). This segmentation allows standard uniform manufacturing processes to be used for the majority of the panel while accommodating metal lines in dedicated separation areas.
Solution Approach 2:
Metal lines are extracted from the pixel opening regions and placed exclusively in pixel separation regions. This extraction eliminates the need to adjust sub-pixel spacing for metal line accommodation, maintaining uniform spacing and simplifying manufacturing processes.
4Measurement precision
If metal lines are arranged densely to improve touch coverage, then touch sensitivity improves, but interference with pixel openings increases
Solution Approach 1:
Touch electrode density is increased by adding more layers in the vertical dimension rather than increasing horizontal density. Multiple stacked metal mesh layers provide high touch sensitivity while each layer maintains adequate spacing from pixel openings by being confined to pixel separation regions.
Data Source
Figure 1A
Figure 1B
Figure 1C~1D
AI summary
A touch structure, a touch display panel and an electronic device are provided. The touch structure includes a first metal mesh layer including first touch electrodes spaced and extended along a first direction, each first touch electrode includes first touch sub-electrodes and first connection electrodes arranged along the first direction and connected with each other, and the first metal mesh layer further includes second touch sub-electrodes spaced and arranged sequentially along a second direction; at least one first metal mesh includes three insulated first metal mesh parts which are respectively belong to three insulated touch sub-electrodes; the three touch sub-electrodes include two first touch sub-electrodes adjacent in the second direction and a second touch sub-electrode, or includes two second touch sub-electrodes adjacent in the first direction and a first touch sub-electrode. The touch structure can effectively increase touch sensibility.