Non-rectangular Display Device Frame Area Optimization
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Solution Overview
Problem
Conventional in-cell type display panels with rectangular display areas face challenges in size reduction and narrowing of the frame area when adapted to non-rectangular shapes, leading to inefficiencies in substrate and panel size utilization.
Innovation Solution
The display device features signal lines and common electrodes arranged in a non-rectangular display area with overlapping edges, where video signal transmission lines are positioned along one edge and scan circuits and common drive circuits are placed along another edge, allowing for a narrower frame area and reduced panel size by optimizing the layout within the frame area adjacent to the overlapping part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display area is made non-rectangular to meet design requirements, then the adaptability and design flexibility are improved, but the substrate size and frame area increase leading to larger panel size
Solution Approach 1:
The patent applies dimensionality change by allowing signal lines to extend beyond the display area boundaries into the frame area, and by arranging circuits in three-dimensional space rather than strictly two-dimensional planar布局. This enables more efficient use of available space and reduces the overall substrate size required for non-rectangular display areas.
Solution Approach 2:
The patent implements nesting by placing circuits within the frame area that overlaps with the signal line extension area. Specifically, circuits are positioned in regions where signal lines pass through, creating a nested arrangement that maximizes space utilization and minimizes the required substrate area.
2Ease of manufacture
If circuits are arranged along the edges of the display area, then the ease of manufacture is improved, but signal crosstalk increases affecting reliability
Solution Approach 1:
The patent applies local quality by differentiating the arrangement strategy for different types of signal lines. Video signal lines and scan signal lines are arranged with different orientations and spacing in different regions of the display area, optimizing each signal type's path to minimize crosstalk while maintaining manufacturing simplicity.
Solution Approach 2:
The patent introduces shielding structures and grounding lines as intermediary elements between adjacent signal lines. These intermediaries act as barriers that reduce electromagnetic coupling and crosstalk between signal lines that must be arranged close together for manufacturing efficiency.
3Area of stationary object
If the frame area is narrowed to reduce panel size, then the area efficiency is improved, but the space for circuit arrangement decreases affecting device complexity
Solution Approach 1:
The patent utilizes the third dimension (vertical layering) by arranging different circuits and signal lines in multiple layers. This vertical stacking allows more circuits to be accommodated in a narrower frame area without increasing planar complexity, as circuits are distributed across different height levels rather than competing for the same two-dimensional space.
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 minimizes signal crosstalk and enables a more compact design for display devices with non-rectangular display areas, effectively reducing the size of the display panel while maintaining functionality.
Implementation Method 1
An electrostatic capacitance type touch panel has a detection electrode and a drive electrode. A drive signal is applied to the drive electrode to detect an object, such as a finger, etc., approaching and touching the touch panel, based on an output signal from the detection electrode.
Data Source
AI summary
To enable size reduction of a display device having a touch sensor function in which a display area has a non-rectangular shape. In a display area, video lines extend in the first direction, and scan lines and common electrodes extend in the second direction. A video signal transmission circuit is arranged along a first edge of the display area, with which the one ends of the video lines are aligned. A scan line driver is arranged along a second edge of the display area, with which the ends of the scan lines and the common electrodes are aligned. The display area has a shape including an overlapping part between the first edge and the second edge. In a part of the frame area adjacent to the overlapping part, the scan line driver is arranged more outward than the video signal transmission circuit.