Bendable Display Circuit Board Sliding Groove Mechanism
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Solution Overview
Problem
Bendable display devices with curved screens face issues of limited viewing angles and susceptibility to damage due to excessive interaction forces between the circuit board and the backplate when bent, leading to deformation and defects.
Innovation Solution
The design incorporates sliding grooves and blocks on the backplate, allowing the circuit board corners to move freely, reducing interaction forces and preventing deformation by distributing the bending stress more evenly, and using positioning columns and screws for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the circuit board card is fixed rigidly at four corner portions to the backplate, then the structural stability is improved, but the circuit board card bears excessive interaction forces during bending which leads to damage and defects
Solution Approach 1:
The patent transforms the rigid fixed connection into a dynamic sliding connection. The circuit board card is connected to the backplate through sliding blocks that can move along sliding grooves, allowing the connection to adapt dynamically during bending operations. This dynamic mechanism reduces stress concentration and prevents circuit board damage while maintaining structural stability.
Solution Approach 2:
The patent segments the fixed connection points into movable sliding blocks that travel along defined paths (sliding grooves). Instead of four rigid corner fixations, the connection is divided into multiple sliding contact points that can independently adjust their positions, distributing the bending forces more evenly across the circuit board card.
2Adaptability or versatility
If the circuit board card is made flexible to allow bending, then the bendability is improved, but the circuit board card tends to keep flat generating great interaction forces with the bent backplate
Solution Approach 1:
The patent introduces sliding blocks as intermediary elements between the circuit board card and the backplate. These sliding blocks act as mediators that facilitate the bending motion while reducing direct contact forces. The sliding mechanism allows gradual adaptation to the curved state, minimizing sudden force spikes and interaction stresses.
3Stability of the object's composition
If the circuit board card is fully fixed to prevent movement, then the positional stability is improved, but the circuit board card cannot accommodate bending movements leading to stress concentration and damage
Solution Approach 1:
The patent implements a dynamic connection system where sliding blocks move along sliding grooves during bending. This dynamic mechanism maintains positional stability in the flat state while enabling controlled movement during bending, preventing stress concentration and preserving circuit board card strength throughout the bending cycle.
Data Source
AI summary
A bendable display device including a backplate and a circuit board card arranged opposite to the backplate is provided. Among four corner portions of the circuit board card, a first corner portion and a second corner portion are adjacent to each other and are respectively fixedly installed on the backplate. The backplate is provided with two sliding grooves respectively arranged corresponding to a third corner portion and a fourth corner portion of the circuit board card, a sliding block is arranged in each sliding groove, and a height of the sliding block is less than a depth of the sliding groove. The bendable display device further includes installing columns corresponding to the sliding grooves one to one, a first end of each installing column is connected with the sliding block in the sliding groove, and a second end of each installing column is connected with the circuit board card.