Display Screen Assembly Positioning Ribs for Drop Protection
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Solution Overview
Problem
Conventional narrow-border display screens, where the glass plate is not protected by the backlight plate, are prone to cracking during drop testing due to collision with the terminal housing, affecting usage and reliability.
Innovation Solution
A display screen assembly with a housing featuring positioning ribs around the side walls, which create gaps between the display screen and the housing, preventing direct contact and collision, and ensuring the ribs' top is not higher than the backlight plate, along with a design where the edge of the backlight plate aligns with the glass plate for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the glass plate and backlight plate are made with the same size to achieve narrow-border terminal, then the border size is reduced, but the glass plate becomes prone to collision with housing during drop testing causing screen cracking
Solution Approach 1:
The housing is segmented into multiple side walls, and positioning ribs are added to each side wall to create distinct protective zones. This segmentation allows the glass plate to be isolated from direct contact with the housing while maintaining the narrow-border design.
Solution Approach 2:
Positioning ribs are introduced as intermediary elements between the glass plate and the housing side walls. These ribs act as mediators that prevent direct contact and collision during drop testing, while still allowing the glass plate to maintain its full size for narrow-border aesthetics.
2Reliability
If positioning ribs are added to side walls to prevent display screen contact with housing, then collision risk is reduced, but device complexity increases
Solution Approach 1:
Instead of modifying the entire housing structure uniformly, positioning ribs are added only at specific locations where contact with the display screen is most likely to occur. This localized approach provides protection while minimizing the increase in overall device complexity.
Solution Approach 2:
The positioning ribs have asymmetric geometry with inclined surfaces and rounded chamfers designed to specifically guide and protect the display screen during drop events. This asymmetric design provides targeted protection functionality without requiring symmetric modifications throughout the entire housing.
3Reliability
If the top of positioning ribs is not higher than the top of backlight plate to prevent collision, then protection is provided, but the positioning rib height is constrained
Solution Approach 1:
The positioning ribs are designed with predetermined heights that are manufactured to be not higher than the backlight plate top surface. This preliminary design constraint ensures that during assembly, the ribs will naturally prevent the glass plate from contacting the housing without requiring complex height adjustment mechanisms.
Solution Approach 2:
The height parameter of the positioning ribs is specifically controlled and optimized to fall within a certain range relative to the backlight plate thickness. By changing and optimizing this critical parameter, the design achieves both protection functionality and manufacturing feasibility.
Data Source
AI summary
A display screen assembly and a mobile terminal are provided and include a display screen and a housing, the housing includes a bottom wall and side walls disposed around the bottom wall, the side walls disposed around the bottom wall are provided with positioning ribs configured to prevent the display screen from being in contact with the side walls, gaps are provided between the positioning ribs and the display screen, and a top of the positioning ribs is not higher than a top of the backlight plate.