Flexible Touch Screen Electrode Segmentation for Bending Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible touch screens using materials like ITO, metal, and inorganic insulating layers are prone to damage when bent due to their intolerance to bending, which compromises their functionality and durability.
Innovation Solution
A flexible touch screen design is proposed with a non-foldable first region having touch electrodes and detection electrodes in a cross distribution and a foldable second region with electrodes in a parallel distribution, utilizing materials such as tin indium oxide, silver nanowire, metal, carbon nanotube, and graphene, allowing for the screen to be bent without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional materials like ITO, metal, and inorganic insulating layers are used for the touch screen, then the touch screen can achieve good electrical conductivity and insulating properties, but the touch screen becomes easily damaged when bent
Solution Approach 1:
The touch screen is divided into a first region with cross-distributed electrodes for non-foldable areas and a second region with parallel-distributed electrodes for foldable areas. This segmentation allows different structural configurations in different regions, enabling the foldable region to accommodate bending while maintaining touch functionality.
Solution Approach 2:
Different electrode distribution patterns are applied to different regions: cross-distribution in non-foldable regions for optimal touch detection, and parallel-distribution in foldable regions for bending compatibility. This local differentiation optimizes both touch sensitivity and flexibility in respective areas.
2Reliability
If the touch screen is arranged above the display screen in a multilayer stack structure, then the critical devices can be protected in the intermediate layer, but the touch screen is relatively far from the intermediate layer requiring higher material standards
Solution Approach 1:
The touch screen is segmented into regions with different electrode distributions, allowing the use of optimized materials and structures in each region. This reduces the overall material complexity requirement while maintaining protection for critical devices in the intermediate layer.
3Area of stationary object
If the flexible display screen performs full screen display when bent, then the display area is maximized, but the non-foldable regions may cause misoperation or damage
Solution Approach 1:
The display screen dynamically adjusts its active display regions based on the folding state. When bent, the system identifies and activates only the foldable second region for display, while keeping the non-foldable first regions inactive. This dynamic adaptation prevents misoperation and damage while optimizing the usable display area for each state.
Solution Approach 2:
The display screen is segmented into foldable and non-foldable regions with distinct electrode distributions. This segmentation enables the system to selectively activate appropriate regions based on folding state, ensuring operational reliability while maximizing display area utilization.
Data Source
AI summary
The present application discloses a flexible touch screen. The flexible touch screen comprises: a first region, the first region comprising touch electrodes and detection electrodes in a cross distribution, the first region being non-foldable; and a second region adjacent to the first region, the second region comprising touch electrodes and detection electrode in a parallel distribution, the second region being foldable. The present application further discloses a flexible display screen, a display device, a display method for a flexible display screen and a method for manufacturing a flexible touch screen.