Curved Display Edge Substrate with Double Etched Regions
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Solution Overview
Problem
Current curved display devices face challenges in manufacturing, particularly in achieving double etched portions with different thicknesses and surface heights on the edges, which affect the device's curvature and immersion experience.
Innovation Solution
A display device design featuring upper and lower substrates with specific protruding and recessed regions, including multiple protruding regions with varying thicknesses and surface heights, allowing for flexible film attachment and reduced bending stress through strategic etching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the display device is designed with thin thickness at initial fabrication, then the device can be manufactured as a curved display, but the manufacturing process becomes more complex requiring precise control of etching processes to achieve double etched portions with different thicknesses
Solution Approach 1:
The patent applies segmentation by dividing the edge region into multiple distinct protruding regions (first, second, third, and fourth protruding regions) with different thicknesses. This allows each region to be optimized independently for its specific function - the first and second protruding regions provide structural support while the third and fourth protruding regions facilitate curvature, thereby managing manufacturing complexity through systematic division of functional zones.
Solution Approach 2:
The patent implements local quality by creating different thicknesses in different regions of the display device edge. The first and second protruding regions have greater thickness for structural integrity, while the third and fourth protruding regions have smaller thicknesses to enable curvature. This localized variation in thickness allows the device to achieve both strength and flexibility in specific areas without requiring complex overall design changes.
2Shape
If the display device is bent after fabrication to create curvature, then the immersion feeling is enhanced, but bending stress accumulates and may damage the device
Solution Approach 1:
The patent applies preliminary action by pre-forming the double etched portions with different thicknesses during the fabrication process before the final bending operation. The third and fourth protruding regions are designed with reduced thickness in advance to serve as flexibility zones that can accommodate bending stress during curvature formation, preventing stress concentration and potential damage during the bending process.
Solution Approach 2:
The patent implements local quality by creating specific thickness variations in different edge regions to manage bending stress distribution. The third and fourth protruding regions with smaller thicknesses act as stress-relief zones that allow controlled bending, while the first and second protruding regions with greater thicknesses maintain structural integrity, thereby enabling curvature without compromising overall device strength.
3Ease of manufacture
If the edge of the display device has uniform thickness, then the manufacturing process is simpler, but the curvature and immersion experience are reduced
Solution Approach 1:
The patent applies segmentation by dividing the edge into multiple protruding regions with different thicknesses, which enables enhanced curvature and immersion experience. The systematic division into first, second, third, and fourth protruding regions allows each to contribute differently to the overall curvature, with the third and fourth regions providing the necessary flexibility for immersive viewing angles while maintaining manufacturability through defined structural zones.
4Ease of manufacture
If the display device uses a flat panel structure, then the manufacturing process is straightforward, but the immersion feeling and viewing experience are compromised
Solution Approach 1:
The patent applies spheroidality by incorporating curved surfaces through the double etched portions with different thicknesses. The third and fourth protruding regions with reduced thickness enable the display device to achieve curved configurations that provide immersive viewing experiences. This curvature is integrated into the structural design itself, allowing the device to maintain manufacturing feasibility while delivering enhanced immersion feeling through the bent geometry of the edge regions.
Data Source
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AI summary
Provided is a display device. The display device includes an upper substrate; and a lower substrate disposed on a lower portion of the upper substrate and including an outer region extending outward from the upper substrate at one side, wherein each of the upper substrate and the lower substrate includes a protruding region extending along an edge of each of the upper substrate and the lower substrate, and a recessed region surrounded by the protruding region in a plan view and having a thickness smaller than that of the protruding region, wherein the protruding region includes a first protruding region that is adjacent to the outer region and extends in a first direction, a second protruding region that extends in the first direction and is positioned opposite to the first protruding region, a third protruding region that extends in a second direction intersecting the first direction and connects the first protruding region and the second protruding region, and a fourth protruding region that extends in the second direction and is positioned opposite to the third protruding region, wherein the first protruding region includes a 1-1 protruding region, and the 1-1 protruding region includes a 1-1-1 protruding region and a 1-1-2 protruding region disposed between the 1-1-1 protruding region and the recessed region and having a thickness between a thickness of the 1-1-1 protruding region and the thickness of the recessed region.