Cover Window Protrusions Reduce Bezel Size
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Solution Overview
Problem
The existing display apparatuses require a significant adhesive area to ensure fixation forces between the back frame and the cover window, leading to an increased bezel size, which is costly and not easily fixable without adhesives or double-sided tapes.
Innovation Solution
A display apparatus design featuring a cover window with protrusions on one lateral surface and a back frame with fixation grooves and sliding grooves on perpendicular surfaces, allowing for secure coupling without adhesives, minimizing the fixation area and reducing bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large adhesive area is used to ensure fixation forces between the back frame and the cover window, then the fixation strength is improved, but the bezel size increases
Solution Approach 1:
The patent replaces the adhesive bonding system with a mechanical interlocking system. The cover window includes protrusions that fit into corresponding grooves on the back frame, creating a mechanical connection that eliminates the need for adhesives. This substitution allows fixation strength to be achieved through geometric interlocking rather than chemical bonding, thereby reducing the required contact area and minimizing bezel size.
Solution Approach 2:
The patent transitions from a two-dimensional adhesive bonding approach to a three-dimensional mechanical interlocking approach. By designing protrusions and grooves that extend in multiple dimensions, the fixation strength is enhanced through volumetric engagement rather than surface-area-dependent adhesion. This dimensional change allows for strong fixation with minimal visible bezel area.
2Ease of manufacture
If adhesives or double-sided tapes are used to attach the cover window to the back frame, then the fixation process is simplified, but the bezel area increases and costs increase
Solution Approach 1:
The cover window and back frame are designed to self-assemble through their complementary geometric features. The protrusions on the cover window automatically align with and engage into the grooves on the back frame during assembly, eliminating the need for external adhesives or complex fixation processes. This self-service mechanism simplifies manufacturing while minimizing bezel area.
3Area of stationary object
If the fixation area between the cover window and back frame is minimized, then the bezel size is reduced, but the fixation force may be insufficient
Solution Approach 1:
The fixation interface is segmented into multiple discrete protrusion-groove pairs distributed across the cover window and back frame. This segmentation allows the total fixation force to be distributed across multiple contact points, achieving sufficient overall strength while keeping each individual contact area minimal. The segmented approach enables reduced bezel size without compromising fixation force.
Solution Approach 2:
The patent employs composite geometric features combining protrusions and grooves that work together to create a fixation system with high strength-to-area ratio. The complementary shapes are designed to maximize mechanical interlocking efficiency, achieving strong fixation forces within minimal contact area, thereby reducing bezel size while maintaining adequate fixation force.
Data Source
AI summary
A display apparatus in an embodiment comprises a display panel comprising a display area and a non-display area, a cover window being disposed on the display panel, and a back frame being coupled to the cover window, wherein the cover window comprises a plurality of protrusions on a first lateral surface thereof, the back frame comprises a plurality of fixation grooves being coupled to the plurality of protrusions, on a first lateral surface thereof, and the back frame comprises a sliding groove on a second lateral surface thereof, being perpendicular to the first lateral surface, and a third lateral surface thereof, facing the second lateral surface.