Curved Locating Surfaces for Display Assembly Positioning
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Solution Overview
Problem
Existing liquid crystal display modules in touch screen phones face positioning difficulties and light leakage due to the lack of a fixed position between the module and the shell, and additional positioning structures increase assembly complexity and weight.
Innovation Solution
A display device with a surface shell and protective cover plate featuring curved or stepped locating surfaces that securely attach to each other, preventing dislocation and light leakage by creating a precise assembly and reducing the need for additional positioning structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If surface to surface joint is used to attach liquid crystal display module to middle frame, then assembly is simple, but positioning accuracy deteriorates causing dislocation and displacement
Solution Approach 1:
The patent applies curved locating surfaces (first locating surface on the middle frame and second locating surface on the protective cover plate) instead of flat surfaces. These curved surfaces work together to provide precise positioning and locating function, preventing dislocation and displacement while maintaining assembly simplicity. The curvature enables accurate alignment without requiring additional positioning structures.
2Manufacturing precision
If additional positioning structures are added to fix liquid crystal display module, then positioning accuracy improves, but device complexity and weight increase
Solution Approach 1:
The patent merges the positioning function into the curved locating surfaces that are already part of the structural components (middle frame and protective cover plate). Instead of adding separate positioning structures, the locating surfaces are integrated into the existing parts, achieving precise positioning without increasing device complexity or requiring additional components.
Solution Approach 2:
The curved locating surfaces serve multiple functions: they provide positioning accuracy, prevent dislocation, and maintain structural integrity. These surfaces are multi-functional elements that combine locating, positioning, and structural support functions, eliminating the need for dedicated positioning structures.
3Ease of manufacture
If surface to surface joint is used, then assembly is simple, but light leakage occurs from the border
Solution Approach 1:
The curved locating surfaces create a precise fit between the protective cover plate and the middle frame, eliminating gaps at the border. This curved interface design prevents light leakage by ensuring tight contact between components, while still maintaining the simplicity of the assembly process.
Data Source
AI summary
A display device is provided. The display device includes a face housing, a touch device and a protective cover plate. The face housing includes a bottom wall and a side wall; a cavity is formed by the surrounding of the bottom wall and the side wall; the side wall includes a first positioning surface which is a curved surface. The touch device is within the cavity and the protective cover plate is arranged to be attached to the touch device. The protective cover plate includes a second positioning surface which is a curved surface; and the second positioning surface is attached to the first positioning surface, so that the protective cover plate is attached to the face housing. The first positioning surface is set on the face housing and curved surface, the second positioning surface is correspondingly set on the protective cover plate and curved surface. As the positioning action of the second positioning surface and the first positioning surface, the protective cover plate is accurately attached to the face housing when attaching. The problem of misplacement or displacement in the attaching process of the protective cover plate and the face housing is avoided. A terminal is also provided.