Demultiplexer Circuit with Branched Control Electrodes
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Solution Overview
Problem
Existing display devices face challenges in reducing the surface area occupied by demultiplexer circuits, leading to increased frame size due to the large surface area required for patterning, which hinders frame narrowing in display designs.
Innovation Solution
The implementation of a display device with a demultiplexer circuit that utilizes M data lines and N gate lines intersecting in an M-by-N dot matrix, featuring sampling transistors with branched control electrodes and linearly shaped control electrodes to efficiently distribute video signals, reducing the overall surface area occupied by the demultiplexer circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional demultiplexer circuit patterning is used, then the circuit can distribute video signals to multiple data lines, but the surface area occupied by the circuit increases
Solution Approach 1:
The control electrode is divided into multiple branches (first branch part and second branch part) that connect to different sampling transistors. This segmentation allows the single control electrode to control multiple signal distribution paths, reducing the need for separate control structures and thereby minimizing the overall circuit surface area while maintaining the ability to distribute video signals to multiple data lines.
Solution Approach 2:
Multiple control functions are merged into a single control electrode structure. The first branch part and second branch part of the control electrode work together to control different sampling transistors, combining what would traditionally require separate control structures into one integrated element, thus reducing the surface area occupied by the demultiplexer circuit.
2Area of stationary object
If the surface area of the demultiplexer circuit is reduced, then frame narrowing becomes possible, but the circuit must maintain its signal distribution function with fewer resources
Solution Approach 1:
The control electrode serves multiple functions simultaneously - the first branch part controls one sampling transistor while the second branch part controls another sampling transistor. This multi-functionality allows a single control electrode structure to perform what would traditionally require multiple separate control elements, enabling surface area reduction while maintaining full signal distribution capability to multiple data lines.
Solution Approach 2:
The control electrode extends in multiple directions (branches) to connect to different sampling transistors positioned at different locations. By utilizing spatial dimensionality in the electrode design rather than simply increasing linear dimensions, the circuit achieves comprehensive control coverage with minimized surface area occupation.
Data Source
AI summary
A demultiplexer circuit (12) of a display device according to one aspect of the present invention includes signal input lines (Vn), control lines (BSW, GSW, and RSW), and sampling transistors (13R2, 13G2, and 13B1). Sampling transistors connected to one signal input line includes first and second sampling transistors. A first sampling transistor (13B1) includes a control electrode (17) which branches to a first branch part (17a) and a second branch part (17b), either one of an input electrode (15) and an output electrode (18) that are disposed between a first branch part (17a) and a second branch part (17b), and other one of an input electrode (15) and an output electrode (18) that are disposed outside of a first branch part (17a) and a second branch part (17b).