Rounded-Corner Display Device With Mesh Voltage Routing
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Solution Overview
Problem
Existing display devices face challenges in maximizing the display area while minimizing non-display areas, particularly in achieving various shapes and reducing dead space.
Innovation Solution
The display device incorporates a design with a first and second display area, each with a plurality of pixel arrays, and utilizes a mesh-shaped connection of driving voltage lines to efficiently supply voltage to pixels, including a switching unit with demultiplexers and curved edges to optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving voltage lines are extended to the non-display area to supply voltage to pixels, then voltage supply capability is improved, but non-display area occupation increases
Solution Approach 1:
The patent transitions from a conventional linear arrangement of driving voltage lines to a mesh-shaped configuration that extends in multiple directions (first direction and second direction). This dimensional change allows the lines to supply voltage to pixels in rounded corner portions more efficiently without requiring excessive extension into the non-display area, thus resolving the contradiction between voltage supply capability and non-display area occupation.
Solution Approach 2:
The patent applies different line configurations to different regions: in the first display area, driving voltage lines extend in the second direction to supply voltage to pixels in rounded corner portions, while in the non-display area, the lines are disconnected from the driving voltage supply line. This localized differentiation optimizes voltage supply where needed while minimizing non-display area occupation where pixels do not exist.
2Area of moving object
If display area is expanded to include rounded corner portions, then display area ratio is improved, but complexity of voltage supply network increases
Solution Approach 1:
The patent divides the display area into a first display area with pixels arranged in a first direction and a second display area with pixels arranged in a second direction. This segmentation allows each region to have optimized driving voltage line configurations, simplifying the overall voltage supply network while enabling expanded display area with rounded corners.
Solution Approach 2:
The mesh-shaped voltage supply network uses two-dimensional arrangement of driving voltage lines (extending in both first and second directions) to systematically cover the expanded display area including rounded corners. This structured multi-directional approach manages the complexity by providing clear routing paths rather than ad-hoc connections.
3Area of stationary object
If driving voltage lines are disconnected in the non-display area, then non-display area occupation is reduced, but voltage supply to edge pixels may be affected
Solution Approach 1:
The driving voltage lines are configured to extend to the area between the first display area and the first driving voltage supply line before disconnecting. This preliminary extension ensures that all pixels in the first display area, including those in rounded corner portions, receive adequate voltage supply before the lines terminate in the non-display area, thus maintaining reliability while reducing non-display area occupation.
Data Source
AI summary
A display device includes a display area of various shapes, has a reduced dead space, and displays an image. Further, the display device includes a display unit including a rounded corner portion, a first driving voltage supply line arranged in a first direction in a non-display area on one side of the display unit, a plurality of first driving voltage lines which supplies a driving voltage to a plurality of pixels and is arranged in a second direction that intersects with the first direction and being connected to the first driving voltage supply line, and a plurality of second driving voltage lines disconnected from the first driving voltage supply line.