Thin-Film Transistor Protrusion Enhances Current for Aperture Ratio
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Solution Overview
Problem
Existing display technologies face challenges in improving the aperture ratio of pixel units and reducing frame regions in display panels, particularly for smaller pixel units and anti-electrostatic circuits, due to limitations in optimizing circuit components and structures.
Innovation Solution
Incorporating a thin-film transistor with a current enhancement portion, featuring protrusion or island structures with tips between the drain and source, which enhances current flow while reducing occupied space, thereby improving aperture ratio and reducing frame regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the area of pixel units is reduced to achieve finer images or narrower frames, then the resolution or frame width is improved, but the aperture ratio of the pixels deteriorates
Solution Approach 1:
The patent applies local quality by creating protrusion portions at specific locations (drain and source regions) of the transistor structure. These protrusions concentrate the current enhancement function at critical locations rather than uniformly increasing the entire transistor area, thus improving aperture ratio without significantly increasing pixel unit area.
Solution Approach 2:
The patent transitions from a planar transistor structure to a three-dimensional structure by adding protrusion portions that extend vertically or laterally from the drain and source. This dimensional change increases the effective current path area without proportionally increasing the footprint area, thereby improving aperture ratio while maintaining compact pixel unit dimensions.
2Illumination intensity
If the brightness of back lighting is increased to maintain picture brightness with smaller pixel units, then the aperture ratio is maintained, but the power consumption increases
Solution Approach 1:
The patent changes the electrical parameters of the transistor by introducing protrusion portions that modify the current flow characteristics. This increases the on-current density, allowing the pixel to achieve the same brightness with lower backlight intensity, thereby reducing power consumption while maintaining picture brightness.
3Area of stationary object
If conventional circuit components are optimized to reduce occupied area, then the aperture ratio improves, but the current flow capability deteriorates
Solution Approach 1:
The patent embeds protrusion portions within the existing transistor structure, nesting additional current-conducting features inside the drain and source regions. This nested structure increases current flow capability without significantly increasing the overall transistor footprint, thus maintaining compact area while enhancing power handling.
Data Source
AI summary
Embodiments of the disclosure provide a thin-film transistor, an array substrate, a display panel and a display device. The thin-film transistor includes a current enhancement portion, and the current enhancement portion is provided between a drain and a source. The current enhancement portion may include at least one protrusion portion, and the protrusion portion is provided on the drain and/or the source and faces a channel. The current enhancement portion may include an island portion provided between the drain and the source, and the island portion is separate from the drain and the source. The island portion may include at least one protrusion end, and the at least one protrusion end faces the drain and/or the source.