Backlight Module Positioning Hook Design
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Solution Overview
Problem
Conventional methods for positioning optical films in backlight modules are inefficient, leading to increased manufacturing procedures, potential damage from burrs, and limited design flexibility, which affects production efficiency and quality.
Innovation Solution
A positioning hook with two hook portions, one for the optical film and one for the back plate, designed in various shapes such as arc, rectangular, or triangular, to simplify assembly and ensure a slim design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If studs and holes are disposed to fix the optical film, then the optical film can be positioned on the back plate, but the manufacturing procedures increase and production efficiency decreases
Solution Approach 1:
The positioning function is segmented into two independent hook portions: a first hook portion that engages with the optical film and a second hook portion that engages with the back plate. This segmentation eliminates the need for separate studs and holes, reducing manufacturing procedures while maintaining positioning reliability.
Solution Approach 2:
The positioning hook combines multiple functions into a single component: it serves as both the positioning element and the fixing element. By merging the positioning and fixing functions into one integrated hook structure, the number of manufacturing steps is reduced while maintaining effective optical film fixation.
2Reliability
If fitting grooves are formed on the back plate, then the optical film can be fitted and fixed, but burrs are generated that may damage the optical film
Solution Approach 1:
Instead of forming grooves in the back plate that require cutting operations (which generate burrs), the invention uses protruding hooks that engage with the optical film edges. This inverted approach eliminates the cutting operation on the back plate, preventing burr generation while maintaining secure fixation.
Solution Approach 2:
The positioning hook acts as an intermediary element between the back plate and the optical film. It provides a mechanical engagement interface that avoids direct cutting contact with the optical film, thereby preventing burr-induced damage while ensuring reliable fixation.
3Reliability
If upper and lower frames with hooks and grooves are used, then the optical film is effectively fixed, but the backlight module cannot have a slim design and space for other components is limited
Solution Approach 1:
The invention extracts the essential positioning and fixing function from the complex upper-lower frame structure. By using a single positioning hook that engages with the back plate, the bulky frame structure is eliminated, achieving a slim design while maintaining effective optical film fixation.
Solution Approach 2:
The positioning hook is designed as a thin, flexible component that can be integrated into the back plate structure without adding significant thickness. This allows the backlight module to maintain a slim profile while still providing effective optical film positioning and fixation.
Data Source
AI summary
A positioning hook of an optical film of a backlight module, wherein the backlight module has a frame, and the optical film is disposed on an inner side of the frame. The positioning hook includes a first hook portion and a second hook portion corresponding with each other. The first hook portion is disposed at a first end of the positioning hook for penetrating through and hooking on an edge of the optical film. The second hook portion is disposed at a second end of the positioning hook opposite to the first end for hooking on an edge of the frame, so that the optical film is disposed and fixed in the frame.