Backlight Module Positioning Assembly Bending Portion
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Solution Overview
Problem
In traditional liquid crystal display (LCD) backlight modules, the expansion of the light guiding plate can exert pressure on other components, potentially damaging them due to the lack of effective fixation and distribution of stress.
Innovation Solution
A backlight module design featuring a positioning assembly with a bending portion on the back cover that securely adheres the positioning component, allowing for easy assembly and reworking, while an additional bending portion at the light source side prevents pressure from the light guide plate expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the positioning component is made of elastic material to allow light guiding plate expansion, then the light guiding plate can expand without damage, but the elastic material may compress and damage other parts such as the light bar
Solution Approach 1:
The positioning component is divided into two functional parts: a rigid positioning body that maintains structural integrity and prevents over-expansion, and a separate buffering component that absorbs expansion stress. This segmentation allows each part to perform its specific function without causing harm to other components.
Solution Approach 2:
A buffering component is introduced as an intermediary between the light guiding plate and the positioning component. This buffering element absorbs the expansion force and transmits it to the positioning component in a controlled manner, preventing direct compression of the light bar while still allowing necessary expansion.
2Device complexity
If traditional positioning components are used without bending portions, then the structure is simple, but the assembly and reworking processes are complex and time-consuming
Solution Approach 1:
The positioning component incorporates bending portions that can flex during assembly and reworking operations. These bending sections provide dynamic flexibility, allowing the component to be easily inserted and positioned during assembly, and to be removed or adjusted during reworking without requiring complex tools or procedures.
3Ease of repair
If the positioning component is adhered onto the back cover with bending portions, then assembly is easier and reworking is simplified, but the mechanical strength may be reduced
Solution Approach 1:
The positioning component combines rigid materials for the main body (to maintain mechanical strength) with flexible materials for the bending portions (to enable easy assembly and reworking). This composite construction allows each section to have the appropriate mechanical properties for its specific function.
Solution Approach 2:
The bending portions are integrated within the overall positioning component structure, with the flexible bending sections nested within or as part of the rigid positioning body. This nested design allows the component to maintain its structural integrity while incorporating flexible elements for ease of assembly.
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 fixes the light guiding plate and optical membranes, preventing damage to adjacent components like LEDs from the light guide plate's expansion, enhancing mechanical strength and assembly ease.
Implementation Method 1
the light guiding plate 106 may expand when it is heated, the positioning components 104 is usually formed of elastic material such as rubber
Implementation Method 2
the positioning component is adhered onto the back cover
Data Source
AI summary
The present invention discloses a backlight module and LCD module, the backlight module comprises a back cover, a positioning assembly and a backlight assembly, wherein the backlight assembly is connected with the back cover by the positioning assembly, the positioning assembly comprises a positioning component located at the corner of the back cover and a bending portion provided on the back cover. By means of the bending portion on the back cover, the light guide plate and optical films can be fixed easily and expediently, especially for the assembling and reworking of module. In addition, the other parts disposed close to the light guide plate, for example LED, can be protected effectively from being crushed because of the expansion of light guide plate.