Touch Display Buffer Layer for Sensing Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current touch display devices face accuracy issues in touch sensing due to increased conductivity and decreased resistance between sensing electrode strings, leading to reduced accuracy.
Innovation Solution
A touch display device structure incorporating a buffer layer between the optical matching layer and the substrate, with a thickness of 50 angstroms to 3000 angstroms, to prevent interaction and maintain optimal conductivity and resistance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the optical matching layer is disposed directly on the first substrate, then the manufacturing process is simplified, but the conductivity of the optical matching layer increases and the resistance between adjacent sensing electrode strings decreases, leading to decreased touch sensing accuracy
Solution Approach 1:
A buffer layer is introduced as an intermediary between the first substrate and the optical matching layer. This buffer layer prevents direct interaction between the two layers, maintaining appropriate conductivity of the optical matching layer while preventing excessive decrease in resistance between sensing electrode strings, thereby preserving touch sensing accuracy without significantly complicating the manufacturing process.
Solution Approach 2:
The buffer layer modifies the electrical parameters (conductivity and resistance) of the underlying layers by preventing direct interaction between the optical matching layer and the first substrate. This parameter change maintains the optimal resistance level between sensing electrode strings, preventing the degradation of touch sensing accuracy that would occur with direct contact.
2Reliability
If the buffer layer thickness is increased, then the isolation effect between optical matching layer and substrate is improved, but the device structure becomes more complex and manufacturing difficulty increases
Solution Approach 1:
The buffer layer thickness is optimized within a specific range (50-3000 Å) to achieve the necessary isolation effect without excessive thickness. This parameter optimization ensures adequate electrical isolation between the optical matching layer and the substrate while avoiding unnecessary structural complexity and manufacturing difficulty that would result from excessive thickness.
Data Source
AI summary
A touch display device includes a display panel, a conductive layer, an optical matching layer and a buffer layer. The display panel comprises a first substrate, a second substrate and a display medium layer. The first substrate comprises a first surface and a second surface, the second substrate is disposed opposite to the first substrate, and the display medium layer is disposed between the second surface of the first substrate and the second substrate. The conductive layer is disposed on the first surface of the first substrate, and comprises a plurality of sensing electrodes. The optical matching layer is disposed between the conductive layer and the first surface of the first substrate. The buffer layer with a thickness greater than or equal to 50 Å and less than or equal to 3000 Å is disposed between the optical matching layer and the first surface of the first substrate.