Chamfered Cover Layer for Narrow Display Bezel
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Solution Overview
Problem
Portable electronic devices often have large display bezels that reduce the active display area, making them less aesthetically pleasing and less compact, as the opaque borders required to hide routing circuitry are not uniformly narrow.
Innovation Solution
A chamfered polyhedral cover layer is bonded to the display module, with a large chamfer between the top and side faces, allowing the opaque border to be imperceptible, resulting in uniformly narrow display bezels by optimizing adhesive application and housing design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an opaque border is added to hide routing circuitry, then the routing circuitry is concealed, but the display bezel size increases
Solution Approach 1:
The patent applies dimensionality change by introducing a chamfered face at an angle between the top and side faces of the cover layer. This angular feature creates a third dimensional plane that allows the opaque border to be positioned at an angle rather than flat against the side face, making it imperceptible from the front view while still effectively concealing the routing circuitry.
Solution Approach 2:
The patent applies local quality by creating a chamfered face with specific angular properties only at the perimeter region where the opaque border is located, while the rest of the cover layer maintains its original parallel faces. This localized angular feature selectively hides the opaque border without affecting the overall structure or other regions of the display assembly.
2Area of stationary object
If the cover layer faces are made parallel to maximize display area, then the display area is maximized, but the opaque border becomes visible
Solution Approach 1:
The patent maintains parallel top and side faces for most of the cover layer to maximize display area, but introduces a localized chamfered face at the perimeter where the opaque border is positioned. This localized angular feature selectively hides the opaque border while preserving the parallel-face design benefits for the majority of the display surface.
Solution Approach 2:
The patent introduces an angular chamfered face as an additional dimensional feature at the perimeter, creating a transition zone between the parallel top and side faces. This angular plane redirects the visual perception of the opaque border, making it imperceptible from the front view while maintaining the parallel-face configuration for maximum display area.
Data Source
AI summary
This document describes systems and techniques directed at uniformly narrow display bezels in portable electronic devices. In aspects, a portable electronic device includes a housing that houses a display panel stack having a chamfered, polyhedral cover layer bonded to a top of a display module. The cover layer may include a large chamfer between a top face and a side face, defining a chamfered face extending a perimeter of the cover layer. The chamfered face may be angled any number of degrees in a range from one to eighty-nine degrees to a horizontal plane defined by the top face of the cover layer, such that the chamfered face possesses a front-facing portion. The chamfered face may be adhered to a parallel or subparallel interior face of the housing. In such a configuration, an opaque border added to a face opposite of the top face may be imperceptible to a user, resulting in uniformly narrow display bezels.