Segmented Transistor Structure for High-Resolution Displays
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Solution Overview
Problem
There is a limitation in reducing the size of thin-film transistors for high-resolution display apparatus due to process equipment limitations, which affects the performance in achieving high resolution, minimizing vertical crosstalk, improving response speed, and reducing contact resistance.
Innovation Solution
The display apparatus includes a base substrate with an active pattern, first and second electrodes, a control electrode, and display elements, with multiple insulation layers strategically placed between the electrodes to control parasitic capacitance and contact resistance, and a liquid crystal layer that changes the orientation of liquid crystal molecules by voltage applied to the pixel and reference electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thin-film transistor size is reduced to achieve high resolution, then resolution is improved, but manufacturing precision deteriorates due to process equipment limitations
Solution Approach 1:
The transistor structure is segmented into multiple components: active pattern, first electrode, second electrode, control electrode, and multiple insulation layers. This segmentation allows each component to be optimized independently, enabling high resolution without requiring uniform miniaturization of the entire transistor structure.
Solution Approach 2:
The patent transitions from a planar transistor structure to a three-dimensional stacked structure with multiple electrodes and insulation layers arranged in different layers. This dimensional change allows the transistor to maintain electrical functionality while reducing the footprint area, achieving high resolution without excessive size reduction of individual components.
2Measurement precision
If thin-film transistor size is reduced, then resolution is improved, but contact resistance increases
Solution Approach 1:
The electrical connection path is segmented into multiple contact points: first electrode contacting active pattern at first end, second electrode contacting active pattern at second end. This segmentation distributes the contact resistance across multiple interfaces rather than concentrating it at a single point, reducing overall contact resistance while maintaining compact structure.
Solution Approach 2:
Insulation layers with controlled thickness and material properties serve as intermediaries between electrodes and active pattern. These intermediary layers enable precise control of electrical contact characteristics, reducing contact resistance while maintaining the compact structure needed for high resolution.
3Measurement precision
If thin-film transistor size is reduced, then resolution is improved, but response speed deteriorates
Solution Approach 1:
The patent uses a three-dimensional stacked structure with multiple electrodes and insulation layers arranged in different layers. This vertical arrangement reduces the horizontal distance for signal propagation while maintaining electrical functionality, enabling faster response speed in a compact footprint suitable for high resolution displays.
Solution Approach 2:
The transistor is segmented into functionally independent components (active pattern, electrodes, insulation layers) that can be optimized for different performance characteristics. This segmentation allows the signal path to be optimized for speed while other components are optimized for size, resolving the contradiction between resolution and response speed.
4Measurement precision
If thin-film transistor size is reduced, then resolution is improved, but vertical crosstalk increases
Solution Approach 1:
Multiple insulation layers are positioned between adjacent transistors and between electrodes to serve as electrical intermediaries that block parasitic capacitance coupling. These intermediary insulation layers effectively reduce vertical crosstalk between adjacent pixels, enabling high resolution displays with minimal crosstalk interference.
Solution Approach 2:
The patent arranges electrodes and insulation layers in a three-dimensional stacked configuration rather than a planar layout. This vertical arrangement increases the spacing between adjacent transistor elements in the horizontal plane, reducing capacitive coupling and vertical crosstalk while maintaining high pixel density for high resolution.
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
This configuration enhances the resolution, reduces vertical crosstalk, improves response speed and luminance, and decreases contact resistance, effectively addressing the limitations of existing high-resolution display technologies.
Implementation Method 1
The liquid crystal layer may change an orientation state of liquid crystal molecules by a voltage applied to the pixel electrode and the reference electrode
Data Source
AI summary
A display apparatus may include a base substrate, an active pattern, a first electrode, a second electrode, a control electrode, and a display element. The active pattern may be disposed on the base substrate. The first electrode may be disposed between the base substrate and the active pattern and connected to a first end of the active pattern. The second electrode may be disposed on the active pattern and connected to a second end of the active pattern. The control electrode may overlap the active pattern and be insulated from the active pattern. The display element may be disposed on the second electrode and connected to the second electrode.