Dual-Source TFT Sensing Element for Multi-Directional Deformation Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current on-cell sensing displays face challenges with poor product yield and increased manufacturing costs as screen size increases, and existing in-cell sensing technologies require significant capital investment for production adjustments.
Innovation Solution
A sensing display panel with a dual-source thin-film transistor design, where the first and second sources are extended toward the channel region in intersecting directions, allowing two currents to pass through, enhancing carrier collection rate and sensitivity for touch and bend sensing applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional single-source sensing element is used, then the structure is simple, but the sensitivity and carrier collection rate are insufficient
Solution Approach 1:
The sensing element is segmented into two separate source regions (first source and second source) instead of using a single source. This segmentation allows current to flow through multiple paths (first source to drain, and second source to drain), increasing the carrier collection rate and sensitivity while maintaining a relatively simple TFT structure that can be integrated into existing display manufacturing processes
2Adaptability or versatility
If the sensing element can sense deformation in multiple directions, then the sensing capability is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The first source and second source are positioned asymmetrically relative to the channel region, with the first source extended toward the channel region in a first direction and the second source extended toward the channel region in a second direction. This asymmetric dual-source configuration enables the sensing element to detect deformations in multiple directions (including bending in different orientations) while using the same manufacturing process as conventional single-source designs, avoiding additional process complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dual-source design increases sensitivity and enables accurate sensing of deformations in multiple directions, reducing manufacturing costs and product thickness while maintaining high yield without additional capital expenditure.
Implementation Method 1
two currents with different paths pass through the sensing element, and thereby the sensing display panel has increased carrier collection rate
Data Source
AI summary
A sensing element is provided. The sensing element includes an active layer, a first source, a second source, a drain, and a gate. The active layer is disposed on a substrate, wherein the active layer includes a first source region, a second source region, a drain region, and a channel region. The first source is electrically connected to the first source region. The second source is electrically connected to the second source region. The drain is electrically connected to the drain region. The gate is overlapped with the channel region in a normal direction of the substrate, wherein the first source is extended toward the channel region in a first direction, the second source is extended toward the channel region in a second direction, the first direction and the second direction are intersected with the normal direction, and an angle between the first direction and the second direction is not equal to 180 degrees.