Stacked Demux Circuit Layout for Narrow-Bezel Array Substrates
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Solution Overview
Problem
The existing display devices have a large frame width due to the significant area occupied by demultiplexer (Demux) circuits in the non-display area, which contradicts the trend of achieving a narrow frame display.
Innovation Solution
The array substrate design includes a Demux circuit with a stacked configuration of gates and active layers perpendicular to the substrate, reducing the horizontal area occupied by the Demux circuit, thereby minimizing the non-display area and frame width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the demultiplexer circuit is placed in the non-display area, then the signal channel can be decomposed into multiple channels, but the frame width increases
Solution Approach 1:
The patent transitions from a planar arrangement of demultiplexer circuits to a three-dimensional stacked structure where multiple active layers are vertically arranged. This vertical stacking enables signal channel decomposition while minimizing the horizontal footprint in the non-display area, thereby reducing frame width without compromising demultiplexing functionality
Solution Approach 2:
The patent implements a nested structure where multiple active layers (first active layer, second active layer, etc.) are stacked vertically within the non-display area. Each active layer contains transistors that work together to achieve signal demultiplexing, with the layers nested in a vertical configuration that maximizes space efficiency and reduces the overall frame width
2Reliability
If the demultiplexer circuit occupies large area, then the circuit functionality is ensured, but the screen-to-body ratio decreases
Solution Approach 1:
The patent utilizes vertical stacking of multiple active layers to perform demultiplexer circuit functions. This three-dimensional arrangement maintains complete circuit functionality while dramatically reducing the horizontal area occupied in the non-display region, thereby increasing the screen-to-body ratio without sacrificing reliability
Solution Approach 2:
The demultiplexer circuit is segmented into multiple independent active layers, each containing specific transistors and circuit elements. This segmentation allows the circuit functionality to be distributed across vertical layers rather than concentrated in a large planar area, reducing the overall non-display area while ensuring complete functional operation
Data Source
AI summary
Embodiments of the present application provide an array substrate, a manufacturing method thereof, and a display device. The array substrate includes a substrate and a Demux circuit disposed on the substrate, wherein the Demux circuit includes a first gate, a second gate, a first active layer, a second active layer, a first source, a second source, the first drain, and the second drain. The embodiments of the present application set the first gate and the second gate to be stacked in a direction perpendicular to the substrate, and the first active layer and the second active layer are set to be stacked in the direction perpendicular to the substrate, which can significantly reduce the occupied area of the Demux circuit in the horizontal direction.