Curved Display Module Staircase Back Plate Curvature Control
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Solution Overview
Problem
There is a lack of effective control solutions for the curvature of large-size curved display modules, which affects the performance and display quality, particularly in vehicle-mounted applications where reliability and credibility are critical.
Innovation Solution
A curved display module design that includes a display panel, backlight module, front frame, back plate, XPCB, and FPC, with a staircase-shaped back plate and snap fasteners to securely connect sub-XPCBs, reducing the risk of FPC tearing and ensuring reliable curvature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional flat display architecture is used, then manufacturing is simple, but display quality and ergonomic design are insufficient
Solution Approach 1:
The XPCB is divided into multiple sub-XPCBs arranged in parallel, with each sub-XPCB independently fixed to the back plate. This segmentation allows for better curvature control of each segment while managing the overall complexity of the curved display structure.
Solution Approach 2:
The back plate is designed with a staircase-shaped structure that adds a dimensional element to the assembly. This staircase structure provides multiple levels for mounting components, enabling precise curvature control by positioning sub-XPCBs at different heights and locations along the curved surface.
2Reliability
If FPC is bonded to XPCB in curved display, then electrical connection is achieved, but FPC may tear under vibration and stress
Solution Approach 1:
The XPCB is segmented into multiple sub-XPCBs, which distributes the mechanical stress and vibration across multiple independent units. This reduces the stress concentration on any single FPC connection point, lowering the risk of tearing while maintaining electrical connectivity.
Solution Approach 2:
Snap fasteners are strategically positioned at specific locations on the back plate to provide localized reinforcement and stress distribution. These snap fasteners create secure anchor points that reduce mechanical stress on the FPC bonding regions, particularly in areas prone to vibration and tearing.
3Manufacturing precision
If curvature control is not implemented, then manufacturing is easier, but display quality and performance deteriorate
Solution Approach 1:
The back plate is pre-formed with a staircase-shaped structure that incorporates curvature control features before assembly. This preliminary shaping of the back plate provides built-in guidance and positioning for sub-XPCBs, making curvature control an inherent part of the assembly process rather than a separate complex operation.
Solution Approach 2:
The staircase-shaped back plate structure changes the geometric parameters of the mounting surface, creating discrete levels and positions that naturally guide the curvature alignment. This geometric parameter change simplifies the assembly process by providing physical references for correct positioning.
4Reliability
If sub-XPCBs are independently fixed, then curvature control is improved, but device complexity increases
Solution Approach 1:
The snap fasteners serve multiple functions: they mechanically secure sub-XPCBs to the back plate, provide positioning alignment, distribute mechanical stress, and facilitate assembly. This multi-functionality reduces the need for additional separate components, managing device complexity while achieving reliable curvature control.
Data Source
AI summary
A curved display module and a curved display device. The curved display module can be bent along a long-side direction, and comprises a display panel (1), a backlight module (2), a front frame (3), a back plate (4), an XPCB (6), and an FPC (5); the FPC (5) is provided at a first long-side edge of the display panel (1) and is configured to connect the binding region of the first long-side edge of the display panel (1) to the XPCB (6); the first long-side edge of the back plate (4) is in the shape of staircase, and comprises a back surface (41), a slope surface (42), and a step surface (43) that are sequentially connected from the direction distant from the first long-side edge to the direction close to the first long-side edge.