Display Device Lower Frame Positioning Projections for Assembly Alignment
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Solution Overview
Problem
Manual and automatic assembly of liquid crystal display devices often results in misregistration and incomplete screwing, leading to component damage and poor operation efficiency, particularly during the mounting of the TCON substrate and positioning between the supporting member and upper frame.
Innovation Solution
The implementation of a display device configuration with positioning projections and grooves on the lower frame and supporting member, and positioning openings on the upper frame, allowing for precise alignment and secure mounting of components, even with misregistration, by using protrusions and curved surfaces to facilitate smooth insertion and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual assembly is used for mounting components, then flexibility in assembly process is maintained, but misregistration and incomplete screwing occur leading to component damage and poor operation efficiency
Solution Approach 1:
The patent applies preliminary action by pre-forming positioning projections and grooves on the frame members before assembly. These positioning features are created in advance during manufacturing, ensuring that when components are assembled, they automatically align correctly without requiring high precision during the assembly operation itself. This resolves the contradiction by maintaining operational flexibility while ensuring assembly precision through pre-prepared positioning structures.
Solution Approach 2:
The positioning projections and grooves act as intermediaries between the frame members and components being assembled. These intermediary features facilitate correct positioning and alignment, preventing misregistration and incomplete screwing. The positioning projections insert into corresponding grooves to guide component placement, thereby improving assembly reliability without restricting operational flexibility.
2Productivity
If automatic assembly is used for mounting components, then operation efficiency is improved, but misregistration occurs due to positioning difficulties
Solution Approach 1:
The positioning projections and grooves are pre-formed during manufacturing of the frame members, before the automatic assembly process. This preliminary preparation ensures that automatic assembly equipment can simply guide components along these pre-existing paths without requiring high-precision positioning control, thereby maintaining both high productivity and manufacturing precision.
Solution Approach 2:
The positioning grooves serve as intermediaries that guide the positioning projections during automatic assembly. This intermediary mechanism allows automatic assembly equipment to operate efficiently while ensuring precise component alignment, as the grooves physically guide the projections into correct positions regardless of minor variations in component dimensions or positioning accuracy.
3Device complexity
If simple frame structure is used, then device complexity is reduced, but positioning precision between components deteriorates
Solution Approach 1:
The frame structure is segmented into multiple frame members, each equipped with positioning projections or grooves at specific locations. This segmentation allows the simple overall frame structure to incorporate precise positioning features without increasing overall complexity. Each frame member independently provides positioning functionality, maintaining structural simplicity while achieving high positioning precision.
Solution Approach 2:
The positioning projections and grooves are added only at specific local positions on the frame members where component attachment is required, rather than complicating the entire frame structure. This local quality approach ensures that the frame maintains its overall simplicity while achieving high positioning precision at critical locations through localized structural features.
4Manufacturing precision
If positioning features are added to frame members, then assembly precision is improved, but device complexity increases
Solution Approach 1:
The positioning features are segmented and distributed across multiple frame members rather than concentrating complexity in one location. Each frame member has simple positioning projections or grooves formed at relevant positions, which collectively provide high assembly precision without requiring any single frame member to be overly complex.
Solution Approach 2:
Positioning features are added only at local positions on frame members where component attachment is needed, rather than modifying the entire frame structure. This localized addition of positioning projections and grooves improves assembly precision while minimizing the increase in overall device complexity, as the features are confined to specific functional areas.
Data Source
AI summary
A display device includes a display panel, a lower frame arranged in the rear of the display panel when viewed from a viewer, and at least one printed circuit board arranged on or above a flat plane of the lower frame. In this display device, the lower frame carries plural positioning projections. They are located outside of a region, where the printed circuit board is arranged, at positions facing each other with the interposition of the region, and arise from the flat plane of the lower frame toward the printed circuit board. Distal portions of the positioning projections protrude from, and bend away from the printed circuit board arranged on or above the lower frame.