OLED Display Film Zero Bezel Folding Mechanism
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Solution Overview
Problem
Portable information handling systems face challenges in minimizing display panel footprint due to the bezel size, which adds to the height and weight, and affects the visual impression and thermal and power characteristics.
Innovation Solution
A display film with relief portions at each corner allows for a bendable region, enabling the display to fold along a viewing perimeter, effectively creating a zero bezel edge, with control lines and power wirelines folded behind the panel to minimize dimensions and eliminate the bezel structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bezel structure is used to protect the display perimeter, then display protection and structural support are improved, but display panel footprint and visual area are reduced
Solution Approach 1:
The patent removes the traditional bezel structure entirely from the display design. Instead of having a protective frame around the display perimeter, the display edges are folded back underneath the display surface, eliminating the need for a separate bezel component while maintaining protection and reducing footprint.
Solution Approach 2:
The display edges are folded back in the Z-dimension (vertical dimension) rather than extending outward in the X-Y plane. This dimensional transition allows the display to maintain its protective structure while minimizing its horizontal footprint, creating a zero-bezel appearance without sacrificing structural integrity.
2Reliability
If control lines and wirelines are routed along the display perimeter, then electrical connectivity is maintained, but bezel size and system dimensions increase
Solution Approach 1:
Control lines and wirelines are routed along the folded-back display edges in the vertical dimension rather than along the horizontal perimeter. This allows electrical connectivity to be maintained while the display maintains its compact horizontal dimensions, as the wiring follows the folded display structure underneath the visible area.
Solution Approach 2:
The protective structure and the electrical wiring path are merged into a single integrated structure. The display edges are folded back to provide both mechanical protection and serve as the routing path for control lines and wirelines, eliminating the need for separate bezel structures that would accommodate the wiring.
3Shape
If relief portions are added to fold display edges, then bezel elimination is achieved, but manufacturing complexity increases
Solution Approach 1:
The display structure is segmented into distinct functional zones: the active display area and the folded-back edge portions. Relief portions are strategically placed at specific locations to enable controlled folding at predetermined points, making the manufacturing process more manageable by defining clear fold lines and separation zones.
Solution Approach 2:
The display structure utilizes flexible, thin-film construction that can be folded back without breaking or damaging the display components. This flexibility is achieved through careful material selection and structural design that allows the display edges to bend and fold while maintaining integrity, simplifying the manufacturing process compared to rigid alternative solutions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the display panel's length, width, and height, achieving a minimal footprint while maintaining viewable images, and enhances durability by avoiding folding irregularities at panel corners.
Implementation Method 1
organic light emitting diode (OLED) display panels generally present visual images with pixels that directly generate light by applying current to an organic material
Data Source
AI summary
A zero bezel display formed from an organic light emitting diode film defines a viewing perimeter within an outer perimeter and supports control lines between the viewing perimeter and outer perimeter. A relief cut from each corner of the display film allows each side of the display film to fold to the rear of the display so that the viewing perimeter defines the viewable edge of the display.