Touch Display Spacer Layout for Sensing Without Image Degradation
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Solution Overview
Problem
Existing touch display devices face challenges in improving touch sensing performance without compromising 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 sensor structure in a display panel, where touch electrodes and routing lines are disposed on areas corresponding to spacers, avoiding the light-emitting areas, thereby reducing the impact on image display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch electrodes and routing lines are disposed on light-emitting areas to improve touch sensing performance, then touch sensing performance is improved, but image display performance deteriorates
Solution Approach 1:
The patent introduces a vertical dimension by placing spacers at different heights (first spacers and second spacers at different vertical positions) to create multi-layered support structures. This allows touch electrodes and routing lines to be positioned in specific spatial regions without directly overlapping light-emitting areas, thus improving touch sensing while maintaining image display quality
Solution Approach 2:
The patent applies different spacer configurations in different local regions: first spacers are positioned in certain areas while second spacers are positioned in other areas. This localized differentiation allows touch sensor structures to be strategically placed in regions that do not interfere with light emission, resolving the conflict between touch sensing coverage and image display quality
2Illumination intensity
If touch sensor structure is arranged to avoid light-emitting areas, then image display performance is maintained, but touch sensing coverage is reduced
Solution Approach 1:
By utilizing vertical spacing with multiple spacer layers at different heights, the patent expands the available space for touch electrodes and routing lines. This dimensional approach allows broader touch sensor coverage without increasing horizontal overlap with light-emitting areas, thus maintaining both image display performance and touch sensing coverage
Solution Approach 2:
The patent divides the touch sensor structure into multiple segments supported by different spacer configurations. First spacers and second spacers create distinct support zones that allow touch electrodes to be distributed across larger areas while avoiding concentration in light-emitting regions, thereby maintaining both coverage and image quality
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.