Display Device Light Shielding Layer for Narrow Border Stability
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Solution Overview
Problem
In-vehicle display devices with narrow border or borderless designs face issues of light leakage and peeling of the display panel and backlight module during reliability tests due to structural limitations.
Innovation Solution
A display device design featuring a backlight module with a plastic frame and sheet metal, where the sheet metal's bent portion engages with a T-shaped slot in the plastic frame, and a light shielding layer covers the gap between them, ensuring structural stability and preventing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a narrow border or borderless design is adopted, then the appearance quality and visual effect are improved, but light leakage from the edge occurs and the structure becomes unstable causing peeling after reliability tests
Solution Approach 1:
The frame structure is segmented into multiple functional layers: a plastic frame for basic enclosure, a sheet metal layer for reinforcement, and a light shielding layer for optical control. Each layer performs a specific function, allowing the overall structure to achieve both narrow border appearance and high reliability through coordinated action of segments
Solution Approach 2:
The frame adopts a composite structure combining plastic material and metal material. The plastic frame provides insulation and basic structure, while the sheet metal provides strength and stability. This composite approach allows the narrow border design to maintain both aesthetic appearance and structural reliability
2Reliability
If the plastic frame thickness is increased to improve structural stability, then the reliability is improved, but the frame thickness increases compromising the narrow border design
Solution Approach 1:
The structural support function is segmented from the plastic frame to a dedicated sheet metal layer. This allows the plastic frame to maintain thin profile for aesthetic purposes while the metal layer provides the necessary structural reinforcement, eliminating the need to increase plastic frame thickness
Solution Approach 2:
The sheet metal is positioned specifically at the frame edges where structural support is most needed. This localized reinforcement approach provides maximum structural stability with minimal material addition, keeping the overall frame thickness small while ensuring reliability
Data Source
AI summary
The invention provides a display device, including a backlight module, a plastic frame, and a sheet metal. The plastic frame is disposed on a side of the backlight module, and the plastic frame has a slot. The sheet metal includes a bottom portion and a bent portion perpendicular to the bottom portion, and the bent portion is bent to a side surface of the backlight module and correspondingly engaged in the slot of the plastic frame.