Backlight Module Light Guide Plate Spacer Bonding
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Solution Overview
Problem
The narrow border design in display panels, achieved by reducing the size of the flexible circuit board, leads to a decreased bonding area between the light guide plate and the circuit board, causing the light guide plate to be easily misplaced or detached, affecting the display effect and durability of the backlight module and display panel.
Innovation Solution
Incorporating two spacers on the light guide plate that are bonded to the frame, enhancing the fixing strength by increasing the bonding area between the light guide plate and the flexible circuit board, and using a design that includes a frame with specific border configurations and adhesive placement to secure the light emitting units and spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the size of the flexible circuit board is decreased to achieve narrow border design, then the border width is reduced, but the bonding area between the light guide plate and the flexible circuit board is decreased, causing the light guide plate to be easily misplaced or detached
Solution Approach 1:
The light guide plate is divided into a light guide plate body and separate spacers. The spacers are positioned at the end of the light guide plate body close to the first border and extend in a direction away from the light guide plate body. Each spacer is located in the first gap and bonded to the frame, while the light guide plate body is bonded to the flexible circuit board. This segmentation allows the bonding function to be distributed between multiple components.
Solution Approach 2:
The spacers act as intermediary elements between the light guide plate body and the frame. They are bonded to both the frame and the light guide plate body, providing additional fixing strength and stability. The spacers compensate for the reduced bonding area caused by the narrow border design.
2Length of stationary object
If the size of the flexible circuit board is decreased to achieve narrow border design, then the border width is reduced, but the bonding area between the flexible circuit board and the light guide plate is reduced to less than half of the conventional module, affecting durability and service life
Solution Approach 1:
The light guide plate is divided into a light guide plate body and separate spacers. The spacers are positioned at the end of the light guide plate body close to the first border and extend in a direction away from the light guide plate body. Each spacer is located in the first gap and bonded to the frame, while the light guide plate body is bonded to the flexible circuit board. This segmentation allows the bonding function to be distributed between multiple components.
Solution Approach 2:
The spacers act as intermediary elements between the light guide plate body and the frame. They are bonded to both the frame and the light guide plate body, providing additional fixing strength and stability. The spacers compensate for the reduced bonding area caused by the narrow border design.
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
Significantly improves the durability of the backlight module and display device by ensuring the light guide plate is securely fixed, reducing the risk of detachment and enhancing the display effect while maintaining a narrow border design.
Implementation Method 1
Each of the two spacers is located in the first gap and is bonded to the frame
Implementation Method 2
The light guide plate is located inside the frame and on a side of the flexible circuit board away from the first border and is fixed to a surface of the flexible circuit board to which the light emitting units are fixed
Data Source
AI summary
A backlight module and a display device are provided. The backlight module includes a frame, a flexible circuit board, a light guide plate, and multiple light emitting units. The frame includes opposite first and second borders, and opposite third and fourth borders. The multiple light emitting units are fixed on the flexible circuit board. The flexible circuit board is located inside the frame and is close to the first border. There is a first gap between the light emitting unit closest to the third border and the third border, and between the light emitting unit closest to the fourth border and the fourth border. The light guide plate is fixed to the flexible circuit board. The light guide plate includes a light guide plate body and two spacers. Each of the two spacers is located in the first gap and is bonded to the frame.