Backlight Module Position Avoiding Slots for Narrow Bezel Weight Reduction
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Solution Overview
Problem
Existing display devices with assembly modules are heavy and hinder the achievement of a narrow bezel design due to the weight and structural constraints imposed by these modules.
Innovation Solution
A backlight module design that incorporates a light guide plate with position avoiding slots for LED lamps and a flexible printed circuit board fixed above these slots, eliminating the need for an assembly module, and includes optional features like an optical film layer, shading tape, and reflector sheet to enhance light distribution and prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an assembly module is used to fix the lamp bar, then the lamp bar can be securely fixed in the backlight module, but the total weight of the display device increases and narrow bezel design becomes difficult
Solution Approach 1:
The invention extracts and removes the assembly module from the backlight structure, eliminating the harmful component that caused weight increase. The lamp bar is directly integrated with the light guide plate through position avoiding slots, achieving fixation without the intermediate assembly module that added unnecessary weight and complexity.
Solution Approach 2:
The invention merges the lamp bar and light guide plate into a more integrated structure. The position avoiding slots are directly formed on the light guide plate, and the lamp bar is fixedly connected to these slots, creating a unified assembly that eliminates the need for separate assembly modules and reduces overall weight.
2Reliability
If an assembly module is used to fix the lamp bar, then the lamp bar can be securely fixed in the backlight module, but the bezel width cannot be reduced to narrow dimensions
Solution Approach 1:
The invention removes the assembly module that occupied space in the backlight structure. By eliminating this intermediate component, the overall thickness and bezel width can be reduced, enabling narrow bezel design while maintaining lamp bar fixation through the integrated position avoiding slots.
Solution Approach 2:
The invention transitions from a multi-layer assembly structure to a more planar integration. The position avoiding slots are formed directly on the light guide plate surface, allowing the lamp bar to be fixed in a more compact arrangement that reduces bezel width while maintaining fixation stability.
3Device complexity
If position avoiding slots are provided on the light guide plate for LED lamp fixation, then the assembly module can be eliminated, but the light guide plate structure becomes more complex
Solution Approach 1:
The invention segments the light guide plate by introducing position avoiding slots at specific locations. These slots divide the light guide plate structure into regions that accommodate LED lamps and flexible printed circuit boards, providing fixedation points while maintaining overall structural integrity and enabling direct mounting without assembly modules.
Solution Approach 2:
The invention applies local structural modification to the light guide plate by adding position avoiding slots only at specific locations where LED lamps need to be fixed. The rest of the light guide plate maintains its original optical properties and structure, achieving fixation functionality without globally complicating the 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
This design reduces the overall weight of the display device, facilitates a narrow-bezel design, and improves light brightness and fixation stability without the need for an assembly module.
Implementation Method 1
a lamp bar comprising a flexible printed circuit board and a plurality of LED lamps fixed onto the flexible printed circuit board
Implementation Method 2
a reflector sheet, wherein the reflector sheet is provided beneath the light guide plate
Data Source
AI summary
The present invention discloses a backlight module and a display device, wherein the backlight module includes a light guide plate and a lamp bar, the lamp bar includes a flexible printed circuit board and several LED lamps fixed onto the flexible printed circuit board, wherein at least one position avoiding slot is provided in an edge region of the light guide plate, the LED lamps are located inside the position avoiding slot, and the flexible printed circuit board is located above the light guide plate and fixedly attached to a position of the position avoiding slot. The technical solution of the present invention can achieve fixing the lamp bar without providing an assembly module, which can effectively reduce a total weight of a display device, and meanwhile be advantageous to a narrow-bezel design of the display device.