Backlight Module Adhesion Assembly for Position Stability
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Solution Overview
Problem
Existing liquid crystal display backlight modules face challenges in maintaining luminance and reducing light attenuation due to deformation caused by temperature variations or aging, as the relative position between the light guide plate and the light source can change, affecting the light entry and exit faces.
Innovation Solution
A backlight module design featuring a support plate with a light source and an adhesion assembly where the light guide plate is adhered through adhesion parts extending from the light source, ensuring the light entry face is in direct contact with the light exit face, and a reflection element to enhance light utilization, with a connection part for positional accuracy and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light guide plate is adhered to the support plate using conventional adhesion methods, then the structure is simple and easy to manufacture, but the relative position between the light guide plate and light source changes due to temperature variations or aging, causing light attenuation
Solution Approach 1:
The adhesion assembly is segmented into multiple adhesion parts (first adhesion part, second adhesion part, third adhesion part) positioned at different locations. This segmentation allows each adhesion part to independently maintain positional stability, preventing relative displacement between the light guide plate and light source while keeping the overall structure manageable
Solution Approach 2:
The adhesion assembly acts as an intermediary component between the light guide plate and support plate. It includes a connection part that connects multiple adhesion parts, serving as a mediator that absorbs thermal expansion and aging effects, thereby maintaining stable relative positioning without requiring direct rigid bonding
2Loss of energy
If the adhesion region is positioned far from the light exit face, then the adhesion assembly is easier to install, but the relative position changes under deformation causing increased light attenuation
Solution Approach 1:
Different regions of the adhesion assembly have different functions: the first adhesion part is positioned close to the light exit face to maintain critical positional stability and reduce light attenuation, while the second and third adhesion parts are positioned at other locations to provide additional support and facilitate installation, creating local quality variations that optimize both performance and manufacturability
3Manufacturing precision
If multiple adhesion parts are used to maintain positional accuracy, then the position stability improves, but the manufacturing complexity and number of components increase
Solution Approach 1:
Multiple adhesion parts are merged into a single integrated adhesion assembly that includes a connection part. This merging reduces the number of separate components and simplifies the manufacturing process while maintaining the positional accuracy benefits of having multiple adhesion points, as the connection part coordinates the positioning function across all adhesion parts
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
This design maintains the relative position between the light guide plate and the light source, increasing luminance and reducing light attenuation by ensuring the adhesion region is close to the light exit face, even under deformation, thus enhancing the overall performance of the backlight module.
Implementation Method 1
an adhesion assembly disposed on the first surface of the support plate, and including at least one adhesion part extending from the light exit face of the light source in a direction away from the light source; and a light guide plate including: a bottom surface adhered to the first surface of the support plate through the at least one adhesion part of the adhesion assembly
Implementation Method 2
a reflection element to enhance light utilization
Data Source
AI summary
Embodiments of the present disclosure provide a backlight module, a liquid crystal display apparatus, and a method of manufacturing the backlight module. The backlight module includes: a support plate including a first surface; a light source fixed to the first surface of the support plate, having a light exit face, and configured to emit a light from the light exit face; an adhesion assembly disposed on the first surface of the support plate, and including at least one adhesion part extending from the light exit face of the light source in a direction away from the light source; and a light guide plate including: a bottom surface adhered to the first surface of the support plate through the at least one adhesion part of the adhesion assembly; a top surface located opposite to the bottom surface and serving as a light exit face of the light guide plate; and a side surface surrounding the bottom surface and the top surface. A portion of the side surface serves as a light entry face of the light guide plate.