Arbitrary Shape Display Device with Unicursal Circuit Layout
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Solution Overview
Problem
Conventional display devices face limitations in achieving arbitrary shapes due to restrictions in wiring configurations and labor-intensive mask designing, leading to non-addressable pixel areas and increased frame width/length, while also requiring numerous connection terminals and reduced aperture ratio.
Innovation Solution
The display device features a unicursal arrangement of display element units, including scanning and pixel circuits, on a substrate, allowing for flexible shaping and reducing the need for driver circuits along the outer rim, which simplifies mask designing and minimizes connection terminals, thereby enhancing shape freedom and aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driver circuits are arranged along the outer rim of the pixel matrix, then all pixels can be addressed, but the shape freedom of the display device is limited and frame width increases
Solution Approach 1:
The display device is segmented into a pixel matrix region and a driver circuit region that are spatially separated. The driver circuits are positioned in a specific region rather than along the outer rim, allowing independent optimization of the pixel matrix shape without being constrained by driver circuit placement requirements.
Solution Approach 2:
The arrangement transitions from a two-dimensional matrix layout to a three-dimensional spatial distribution where driver circuits are positioned in a dedicated region below or adjacent to the pixel matrix, enabling arbitrary pixel matrix shapes without extending frame width.
2Productivity
If driver circuits are arranged along the outer rim, then pixel addressing is achieved, but mask designing becomes labor-intensive and time-consuming
Solution Approach 1:
The display device structure is segmented into distinct functional regions: a pixel matrix region and a driver circuit region. This spatial segmentation allows for standardized, modular mask design patterns that reduce complexity and design time compared to custom rim-arranged configurations.
3Device complexity
If driver circuits are arranged along the outer rim, then pixel addressing is enabled, but the number of connection terminals increases
Solution Approach 1:
The driver circuits are segmented and positioned in a dedicated region, allowing connection terminals to be concentrated in a specific area rather than distributed along the entire outer rim. This reduces the total number of connection terminals required and simplifies the connection interface.
4Area of moving object
If driver circuits are arranged along the outer rim, then pixel addressing is achieved, but aperture ratio is reduced
Solution Approach 1:
The display device is segmented into a pixel matrix region where only pixel circuits are located, and a separate driver circuit region. This segmentation ensures that the pixel matrix area is maximized without being encroached upon by driver circuits, thereby increasing the aperture ratio while maintaining complete pixel addressing capability.
Data Source
AI summary
Disclosed is a display device for use of a surface display of an arbitrary shape, including a plural number of display element units, each made up of a circuit that forms a single stage of a scanning circuit and a pixel circuit connected to an output of the scanning circuit, are arranged in a unicursal fashion on a display substrate.