LCD Module Reflection Plate Corrugation Prevention
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Solution Overview
Problem
Conventional liquid crystal display modules experience corrugations on the reflection plate due to thermal expansion and constraining points during assembly, especially in high-temperature or high-humidity environments, which are exacerbated by reverse assembly processes and dimensional management limitations.
Innovation Solution
A liquid crystal display module design that alleviates constraining points by maintaining predetermined gaps between the reflection plate and other components, using a support main with stepped faces to fix the light guide plate and light source assembly, and incorporating a gap ensuring member to increase the gap between the light source assembly and the reflection plate, allowing for forward assembly order to prevent corrugations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the reflection plate is mounted adjacent to the light source assembly and light guide plate during reverse assembly, then the assembly structure is compact, but corrugations occur on the reflection plate due to thermal expansion and constraining points
Solution Approach 1:
The support main is divided into multiple stepped faces that separately support different components (light guide plate, light source assembly, reflection plate). This segmentation allows each component to be positioned independently with appropriate gaps, preventing thermal expansion-induced corrugations while maintaining compact assembly structure.
Solution Approach 2:
The support main with pre-formed stepped faces is prepared in advance to define precise mounting positions and gaps. This preliminary structuring ensures that when components are assembled, they are automatically positioned at correct distances from each other, preventing constraining points before thermal expansion occurs.
2Ease of manufacture
If reverse assembly process is used to mount components, then assembly can be completed, but dimensional management becomes difficult and constraining points increase
Solution Approach 1:
The support main is pre-formed with stepped faces that define exact mounting positions and gaps. This preliminary preparation eliminates the need for complex dimensional management during assembly, as the structure itself provides the positioning references, making both reverse and forward assembly processes equally easy while ensuring precision.
Solution Approach 2:
The stepped faces of the support main act as intermediary structures between components. Instead of directly mounting components against each other (which creates constraining points), the stepped faces serve as mediators that maintain proper spacing and alignment, simplifying dimensional management.
3Volume of moving object
If gaps are reduced between components to improve compactness, then device size decreases, but thermal expansion causes corrugations on the reflection plate
Solution Approach 1:
Different regions of the support main have different stepped face configurations optimized for local requirements. The first lateral stepped face positions the light guide plate at a specific distance from the reflection plate, while the light incident portion positions the light source assembly at another distance, allowing each component to have appropriate thermal clearance while maintaining overall compactness.
Solution Approach 2:
The stepped faces are designed with specific height parameters that define the gaps between components. By carefully selecting these dimensional parameters, the design achieves the minimum necessary gaps to accommodate thermal expansion while minimizing overall device volume, optimizing both compactness and reliability.
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 prevents corrugations on the reflection plate by managing gaps and reducing constraining points, ensuring stable operation and improved assembly efficiency in various environmental conditions.
Implementation Method 1
a reflection plate disposed at the opposite side of the exiting surface of the light guide plate to reflect the light incident to itself toward the light guide plate
Data Source
AI summary
A liquid crystal display module, which can prevent corrugations of a reflection plate, and an assembling method thereof are disclosed. The liquid crystal display module comprises: a liquid crystal panel; a light source assembly; a light guide plate; a reflection plate; a support main; and a cover bottom, the reflection plate being disposed to be spaced a predetermined gap from the inner wall surfaces of the support main, the light guide plate being fixed to lateral stepped faces formed on a lateral inner wall surface of the supporter main while maintaining a first gap between the light guide plate and the reflection plate, and the light source assembly being fixed between an inner wall surface of a light incident portion of the support main and an incident surface of the light guide plate while maintaining a second gap between the light source assembly and the reflection plate.