Modular Back Frame for Flat Panel Displays
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Solution Overview
Problem
Conventional back frames for liquid crystal display devices are costly due to high material and mold expenses, and they struggle with efficient heat dissipation and circuit board fixation.
Innovation Solution
A modular back frame design using primary and secondary assembling pieces with varying heat transfer capabilities and a bracing piece for circuit board fixation, employing aluminum and galvanized steel materials to balance heat dissipation and cost, and simplifying mold structures for cost reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a unitary back frame is made with metal stamping or plastic injection molding, then the back frame structure is simple and manufacturing is easy, but the material cost and mold cost are high
Solution Approach 1:
The back frame is divided into multiple assembling pieces (first assembling piece, second assembling piece, etc.) that can be separately manufactured and then assembled together. This segmentation allows each piece to be produced using smaller, less expensive molds rather than requiring a single large complex mold for the entire back frame structure.
2Ease of manufacture
If a unitary back frame is made with metal stamping or plastic injection molding, then the back frame structure is simple and manufacturing is easy, but the mold expenditure is high
Solution Approach 1:
The back frame is divided into multiple assembling pieces (first assembling piece, second assembling piece, etc.) that can be separately manufactured and then assembled together. This segmentation allows each piece to be produced using smaller, less expensive molds rather than requiring a single large complex mold for the entire back frame structure.
3Temperature
If the whole back panel is made of aluminum material, then the heat dissipation performance is good and product lifespan is extended, but the material cost is extremely high and structural strength is poor
Solution Approach 1:
Different parts of the back frame are made from different materials according to their specific requirements. Aluminum is used for parts requiring good heat dissipation (such as the first assembling piece where the light source is located), while galvanized steel is used for parts requiring high strength and cost-effectiveness (such as the second assembling piece). This local differentiation optimizes both performance and cost.
Solution Approach 2:
The back frame employs a composite structure combining aluminum and galvanized steel materials. The first assembling piece is made of aluminum for heat dissipation, while the second assembling piece is made of galvanized steel for strength and cost efficiency. This composite approach allows the system to achieve both good heat dissipation performance and cost-effectiveness.
4Quantity of substance
If the whole back panel is made of galvanized steel plates, then the material cost is low, but the heat dissipation performance is poor and product performance is deteriorated
Solution Approach 1:
Different parts of the back frame are made from different materials according to their specific requirements. Aluminum is used for parts requiring good heat dissipation (such as the first assembling piece where the light source is located), while galvanized steel is used for parts requiring high strength and cost-effectiveness (such as the second assembling piece). This local differentiation optimizes both performance and cost.
Solution Approach 2:
The back frame employs a composite structure combining aluminum and galvanized steel materials. The first assembling piece is made of aluminum for heat dissipation, while the second assembling piece is made of galvanized steel for strength and cost efficiency. This composite approach allows the system to achieve both good heat dissipation performance and cost-effectiveness.
5Adaptability or versatility
If different back frame molds are provided for liquid crystal planes of different sizes, then the display can accommodate various panel sizes, but the mold cost and manufacturing complexity increase
Solution Approach 1:
The assembling pieces are designed with universal connection structures that can be combined in different configurations to form back frames suitable for various panel sizes. The same basic assembling pieces can be used across different product sizes by varying the number and arrangement of pieces, eliminating the need for completely different molds for each size.
Solution Approach 2:
The back frame is divided into multiple assembling pieces (first assembling piece, second assembling piece, etc.) that can be separately manufactured and then assembled together. This segmentation allows each piece to be produced using smaller, less expensive molds rather than requiring a single large complex mold for the entire back frame structure.
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 modular design reduces material and mold costs while ensuring effective heat dissipation and secure circuit board fixation, addressing the limitations of conventional back frames.
Implementation Method 1
the first resilient bent section being located between the first bearing section and the bracing body and being bent from the first suspension section toward one side of the first suspension section, the first bearing section and the first resilient bent section resiliently clamping a first side edge of the circuit board
Implementation Method 2
the at least two primary assembling pieces comprise a primary assembling piece that has a heat source arranged thereon, the primary assembling piece that has the heat source arranged thereon having a first heat transfer capability
Data Source
AI summary
The present invention provides a back frame of flat panel display device, which includes primary assembling pieces, secondary assembling pieces, and a bracing piece for fixing a circuit board. The primary assembling pieces have a number of at least two, and the at least two primary assembling pieces are connected through joining to form a main frame structure of the back frame. The secondary assembling pieces are joined to the primary assembling pieces. According to practical needs of the main frame structure, different materials are used for different parts at different locations. The back frame is provided with the bracing piece for fixing a circuit board, and the bracing piece includes a bracing body, a first suspension section, a first bearing section, and a first resilient bent section. The present invention also provides a backlight system. The back frame and the backlight system of the present invention have a back frame having a simple structure, overcome the problem that a circuit cannot be easily fixed, reduce the expenditure of a back frame mold, and save the material used for back frame so as to lower down the cost of flat panel display device.