Slim Border Backlight Module Carrying Frame Design
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Solution Overview
Problem
Conventional backlight modules for large displays face challenges in achieving a slim border design while maintaining light emitting quality and structural integrity, often resulting in reduced optical film stability and frame deformation.
Innovation Solution
The proposed backlight module incorporates a heat sink with a first fixing portion and a carrying frame with a second fixing portion, allowing for a slim border design without compromising light emitting quality, and includes a front frame with a fourth fixing portion to engage with the heat sink's third fixing portion, providing a stable structure and effective assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the width of the top wall of the carrying frame is reduced to satisfy a slim border design, then the border thickness is reduced, but the overlapping region between the optical films and the carrying frame decreases, causing the optical film to loosen and affecting display quality
Solution Approach 1:
The invention introduces a vertical dimension solution by designing the carrying frame with a downward extension portion that protrudes below the back frame. This vertical extension creates a new overlapping region with the optical films in the vertical direction, compensating for the reduced horizontal overlapping region caused by the slim border design. The optical films wrap around this downward extension, providing additional adhesion area and preventing loosening while maintaining the slim horizontal profile.
2Length of stationary object
If the carrying frame is designed to have no sidewalls to satisfy the slim border design, then the border thickness is reduced, but the strength and deformation resistance of the front frame and carrying frame are reduced
Solution Approach 1:
The carrying frame is segmented into distinct functional portions: a main body portion that provides the slim border profile, and a downward extension portion that provides structural reinforcement. The downward extension portion acts as a separate structural element that protrudes below the back frame, creating additional overlapping regions with both the back frame and optical films. This segmentation allows the frame to maintain slim horizontal dimensions while gaining vertical structural strength through the extension portion.
3Stability of the object's composition
If fixing structures are added between the carrying frame and back frame, and between the front frame and back frame, then the relative positions are restricted, but the device complexity increases
Solution Approach 1:
The invention merges multiple functions into the downward extension portion of the carrying frame. This single structural element simultaneously serves as: (1) a positioning feature that restricts relative movement between the carrying frame and back frame, (2) an adhesive substrate that provides overlapping region for optical film attachment, and (3) a structural reinforcement element. By combining these functions into one integrated feature rather than separate fixing structures, the design achieves stable relative positioning without significantly increasing device complexity.
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 achieves a slim border while maintaining the structural integrity and light emitting quality of the backlight module, preventing optical film loosening and deformation, and simplifies the assembly process, enhancing manufacturing efficiency.
Implementation Method 1
a light emitting component with higher power of the backlight module is usually disposed on a heat sink, so as to prevent the light emitting device from overheating
Data Source
AI summary
A backlight module and a display module are provided. The backlight module includes a back frame, a light guide plate, a heat sink, a light source module and a carrying frame. The light guide plate has a light emitting top surface and a light incident side surface, and is disposed on the back frame. The heat sink is disposed between the back frame and the light guide plate, and a side surface of the heat sink has a first fixing portion exposed outside the back frame. The light source module is disposed on the heat sink and faces the light incident side surface of the light guide plate. The carrying frame includes a first side wall, and is disposed around the light guide plate. The first side wall has a second fixing portion engaged with the first fixing portion, and is located outside the back frame.