Back Plate Assembly Fixing Member for Optical Film
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Solution Overview
Problem
Conventional backlight modules face issues with securing optical films due to weak structural components, which lead to ineffective fixing and limitations in narrow frame designs, and the use of positioning posts requires additional space and processing challenges.
Innovation Solution
A back plate assembly with a fixing member featuring a guiding groove and a protruding member, where the fixing member is formed through injection molding to combine a high-strength protruding member with a main body, allowing the sidewall to be fixed in the guiding groove and the fixing portion to fill the slot, enhancing strength and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a block is used to secure optical films, then the optical films can be fixed, but the block has poor strength and the pillar is easily broken
Solution Approach 1:
The patent changes the material parameter of the fixing component from a weak block material to a high-strength metal plate material, while maintaining the same basic fixing function. This parameter change resolves the contradiction by providing both the required fixing reliability and the necessary structural strength.
Solution Approach 2:
The patent creates a composite structure by combining a metal plate (providing strength) with a plastic main body (providing integration and positioning functions). This composite approach allows the fixing component to simultaneously achieve high strength from the metal plate and functional integration from the plastic body, resolving the strength-reliability contradiction.
2Reliability
If a block is used to secure optical films, then the optical films can be fixed, but the block has certain thickness which is disadvantageous to narrow frame design
Solution Approach 1:
The patent replaces the thick block structure with a thin metal plate structure that has sufficient strength due to its material properties rather than its thickness. This allows the fixing component to maintain high fixing reliability while significantly reducing the thickness dimension, enabling narrow frame design of the backlight module.
3Device complexity
If positioning posts are used to fix optical films, then the fixing structure is simpler, but through holes must be spaced from the edge due to processing limitations
Solution Approach 1:
The patent extracts the hole-making operation from the back plate and transfers it to the fixing component itself. The through holes are now formed in the metal plate of the fixing component rather than in the back plate, allowing holes to be positioned at the very edge of the back plate without processing limitations, thus reducing the frame width.
4Device complexity
If positioning posts are used to fix optical films, then the fixing structure is simpler, but the through holes affect the appearance of the back plate
Solution Approach 1:
The patent extracts the hole-making operation from the back plate and relocates it to the fixing component. The through holes are now part of the fixing component's structure rather than features of the back plate, eliminating their negative impact on the back plate's appearance while maintaining the simple fixing structure.
5Strength
If injection molding is used to combine protruding member with main body, then the jointing strength is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the metal plate (providing strength) with the plastic main body (providing integration functions) through injection molding. This combining process, while adding manufacturing complexity, creates a unified component with high jointing strength that cannot be achieved through simple mechanical assembly, resolving the strength-manufacturability contradiction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively secures optical films and light guide plates, increasing the strength and reliability of the back plate assembly while allowing for a more compact design by utilizing a guiding groove and slot configuration, and the injection molding process enhances the jointing strength between components.
Implementation Method 1
the injection molding manner is used to form the fixing member of the present invention for combining a protruding member having higher strength with a main body
Data Source
AI summary
A back plate assembly and a backlight module are provided. The back plate assembly includes a back plate, at least one optical film and at least one fixing member. The back plate includes a bottom plate and a sidewall. The optical film is disposed on the bottom plate. The fixing member includes a main body and a protruding member. At least one portion of the main body overlaps with the sidewall. The protruding member is disposed on the main body and is combined with the optical film.