Backlight Module Glue Frame Hook Fixing for Automotive LCD
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Solution Overview
Problem
Current backlight technologies for automotive LCDs face challenges in achieving high contrast and low power consumption, particularly with the direct type backlight module, which is limited by light source structures and heat dissipation conditions, making it difficult to fix structures in conventional side light type light sources.
Innovation Solution
A backlight module design featuring a substrate with openings and a glue frame with hooks that penetrate through the openings to secure the substrate, along with a sealant layer to prevent light leakage and water vapor intrusion, and a step structure for the diffusion layer and display panel to maintain distance and prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a direct type backlight module is used to achieve high contrast and low power consumption, then display performance is improved, but the conventional side light type fixing structure cannot be applied due to light source structure and heat dissipation limitations
Solution Approach 1:
The backlight module is divided into distinct functional components: a substrate for mounting LED chips, a glue frame for sealing and structural support, and separate fixing mechanisms. This segmentation allows the direct type backlight to be constructed with specialized components that address heat dissipation and fixing requirements independently, resolving the incompatibility with conventional side light fixing structures
Solution Approach 2:
The glue frame acts as an intermediary component between the substrate and the housing, providing both sealing and structural support functions. This intermediary structure enables the direct type backlight to achieve proper fixing and sealing without relying on conventional side light type mounting methods, bridging the gap between different backlight architecture requirements
2Strength
If the substrate and glue frame are fixed together to ensure structural integrity, then mechanical strength is improved, but light leakage and water vapor intrusion may occur at junction points
Solution Approach 1:
The fixing function and sealing function are merged into a single integrated solution. The glue frame is fixed to the substrate at multiple points while simultaneously providing continuous sealing along the periphery, eliminating the need for separate fixing and sealing operations. This merging ensures structural integrity while preventing light leakage and water vapor intrusion at junction points
Solution Approach 2:
The patent replaces traditional mechanical sealing methods with a integrated glue frame structure that combines mechanical fixing and optical sealing. The glue frame's continuous peripheral structure provides sealing through its geometric configuration and attachment to the substrate, rather than relying on separate mechanical seals or adhesives applied after assembly
Data Source
AI summary
The present disclosure provides a backlight module and a display device. The backlight module comprises a substrate having a bottom surface; at least two openings disposed on surrounding sides of the substrate and passing through the entire substrate; and a glue frame surrounding and sealed on the surrounding sides of the substrate; wherein the glue frame is provided with a hook corresponding to the openings, and the hook penetrates through the openings from a surface away from the bottom surface of the substrate and is caught on and connected to the bottom surface of the substrate.