Flexible Display Backplane Stress Management via Rotating Housing
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Solution Overview
Problem
The flexible display in electronic devices with large display areas experiences uneven bendable areas, leading to deformation of reflected light and shadow, which affects the user experience.
Innovation Solution
The electronic device incorporates a housing with a rotating assembly and supporters, a flexible display module with a backplane having a bendable area, a protection plate, a first connector, and a first base plate. The first base plate and protection plate allow the backplane to move relative to the protection plate, enabling warping deformation and reducing stress concentration in the bendable area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display area of the electronic device is increased, then the display function is improved, but the overall size of the electronic device becomes larger and it becomes harder to carry
Solution Approach 1:
The patent employs a flexible display module that can dynamically change its configuration between folded and unfolded states. The backplane includes a bendable area that allows the display to transition from a compact folded state (improving portability) to an expanded unfolded state (increasing display area), thus resolving the contradiction between display size and portability through dynamic structural transformation
2Stability of the object's composition
If the backplane is rigidly fixed to prevent movement, then structural stability is improved, but the bendable area experiences stress concentration and deformation
Solution Approach 1:
The patent segments the backplane into a bendable area and a non-bendable area, allowing differential movement behavior. The protection plate is positioned to cover only the non-bendable area, enabling the bendable area to deform freely while maintaining overall structural stability. This segmentation resolves the contradiction by allowing localized flexibility without compromising global stability
Solution Approach 2:
The protection plate is strategically positioned to provide support only in the non-bendable area of the backplane, while leaving the bendable area free to deform. This local differentiation in support quality allows the bendable area to accommodate stress through deformation without transmitting it to the display surface, thus maintaining display uniformity while preserving structural stability
3Manufacturing precision
If the backplane is allowed to move freely, then stress concentration is reduced, but the display surface becomes uneven causing light and shadow deformation
Solution Approach 1:
The protection plate serves as an intermediary element between the backplane and the display surface. It absorbs and redistributes the deformation forces, allowing the backplane to move freely to reduce stress concentration while preventing this movement from transmitting to the display surface. This intermediary structure resolves the contradiction by decoupling the mechanical deformation from the optical surface
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 configuration ensures a gentle and smooth transition between the backplane and the bendable area, reducing deformation and maintaining a consistent display surface, thereby minimizing the deformation of reflected light and shadow.
Implementation Method 1
under the action of internal stress, due to stress concentration, deformation of the bendable area may be transmitted to an area that is of the backplane and that is close to the bendable area
Implementation Method 2
the backplane may move away from the protection plate and cause warping deformation
Data Source
AI summary
An electronic device includes a housing, a flexible display module, a protection plate, a first connector, and a first base plate. The housing includes a rotating assembly and two supporters. The rotating assembly is disposed between the two supporters. The supporter is rotatably connected to the rotating assembly. The flexible display module is covered on the housing. The flexible display module includes a backplane. The backplane includes a bendable area. The bendable area is disposed facing the rotating assembly. The protection plate is disposed between the backplane and the housing. One of the backplane and the protection plate is connected to the first base plate. A part of the protection plate is located between the bendable area and the housing. The first connector connects the backplane and the protection plate. The first connector is disposed on an outer side of the bendable area of the backplane.