Display Device Edge-Aligned Wiring Aperture Ratio
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Solution Overview
Problem
Conventional display devices have limited ability to reduce the size of the non-display area due to the presence of opaque data lines and gate lines, which also reduce the aperture ratio and are expensive, as well as inefficient use of integrated circuit driving chips.
Innovation Solution
The configuration includes thin film transistors with specific electrode connections, where gate lines are disposed between pixel electrodes in the widthwise direction and data lines are alternately placed between pixel electrodes in the lengthwise direction, reducing the number of data lines and using a shift register to minimize the integrated driving circuit chip's role, thereby simplifying the display device's configuration and improving the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If opaque data lines and gate lines are extended to surround pixel electrodes, then the display device can be manufactured with conventional structures, but the aperture ratio is reduced
Solution Approach 1:
The patent positions data lines and gate lines at the edge parts of pixel electrodes rather than surrounding them completely. This dimensional repositioning moves the wiring from a perimeter configuration to an edge-aligned configuration, allowing light to pass through previously blocked areas and improving aperture ratio while maintaining manufacturability
Solution Approach 2:
The patent divides the wiring arrangement into separate data lines and gate lines that are positioned at different edge parts of pixel electrodes. This segmentation allows independent optimization of each wiring type's position, enabling better space utilization and higher aperture ratio compared to conventional surrounding structures
2Adaptability or versatility
If integrated circuit driving chips are used in conventional display devices, then driving functions are provided, but the non-display area size is increased and costs are increased
Solution Approach 1:
The patent merges the driving circuit functions directly into the display area by integrating thin film transistors and wiring structures within the pixel electrode regions. This consolidation eliminates the need for separate integrated circuit driving chips, reducing non-display area while maintaining all necessary driving functions
Solution Approach 2:
The patent designs the thin film transistor structures and wiring to serve multiple functions: data lines serve as both signal transmission paths and structural elements, while gate lines perform both switching control and spatial organization. This multi-functionality reduces the need for separate dedicated driving components, minimizing non-display area
3Reliability
If multiple data lines are used for each pixel electrode, then complete signal transmission is achieved, but the number of data lines increases and configuration becomes complex
Solution Approach 1:
The patent extracts only the essential data line connections needed for signal transmission by positioning a single data line at one edge part of each pixel electrode. This extraction eliminates redundant wiring while maintaining complete signal transmission functionality, reducing the number of data lines and simplifying the overall configuration
Data Source
AI summary
A display device, includes: a plurality of thin film transistors which comprise a gate electrode, a source electrode and a drain electrode; a plurality of pixel electrodes which are respectively connected to the drain electrode of the thin film transistors; a plurality of gate lines which are respectively disposed to the opposite edge parts of the pixel electrodes in a lengthwise direction of the pixel electrodes, and connected to the gate electrode of the thin film transistors; and a plurality of data lines which are respectively disposed to a single edge part of the pixel electrodes in a widthwise direction of the pixel electrodes, and connected to the source electrode of the thin film transistors, a pair of pixel electrodes adjoining each other to interpose the single data line therebetween, and a pair of thin film transistors which are respectively connected to the pair of pixel electrodes being connected with the same single data line.