Backlight Module LED Light Bar Fixation and Brightness Uniformity
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Solution Overview
Problem
Existing backlight modules face issues with non-uniform brightness due to the use of fixing adhesive tapes, which increase the frame width and complicate rework, and result in dark corners at vertex angles, where the LED light bar is not securely fixed, leading to instability and residual adhesive problems.
Innovation Solution
The backlight module design eliminates the need for fixing adhesive tapes by using a backplane with side walls and reflector plate projections to securely fix the LED light bar, and incorporates light guide plate projections to enhance brightness at vertex angles, ensuring stable fixation and uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixing adhesive tapes are used to secure the LED light bar, then the LED light bar is fixed to the backplane, but the frame width increases and rework becomes complicated
Solution Approach 1:
The invention extracts and eliminates the fixing adhesive tape from the backlight module structure. The LED light bar is secured directly to the backplane through structural integration, removing the adhesive tape component entirely. This reduces the frame width by eliminating the space required for adhesive tape application and removes the complications associated with adhesive residue during rework.
Solution Approach 2:
The invention merges the LED light bar fixation function into the backplane structure itself. The backplane is designed with integrated fixation features that directly secure the LED light bar without requiring separate adhesive tape components. This integration eliminates the additional frame width contribution from adhesive tapes and simplifies the overall structure.
2Reliability
If fixing adhesive tapes are used to secure the LED light bar, then the LED light bar is fixed to the backplane, but residual adhesive problems occur
Solution Approach 1:
The invention extracts and eliminates the fixing adhesive tape from the backlight module structure. The LED light bar is secured directly to the backplane through structural integration, removing the adhesive tape component entirely. This eliminates residual adhesive problems and simplifies rework processes.
Solution Approach 2:
The backplane structure provides self-contained fixation capabilities through integrated mechanical features. The structure serves its own fixation function without requiring external adhesive materials, enabling easy disassembly and rework without dealing with adhesive residue.
3Device complexity
If the LED light bar is not securely fixed at vertex angles, then the structure is simpler, but brightness uniformity deteriorates due to dark corners
Solution Approach 1:
The invention applies local quality enhancement at the vertex angles of the light guide plate by adding projections specifically at these locations. These projections increase the net point distribution area precisely where darkness occurs, providing localized brightness enhancement without complicating the overall structure. The rest of the light guide plate maintains its simple design.
4Device complexity
If the frame width is reduced by eliminating adhesive tapes, then the display device is more compact, but fixation stability must be maintained
Solution Approach 1:
The invention merges the LED light bar fixation function into the backplane structure itself. The backplane is designed with integrated fixation features that directly secure the LED light bar without requiring separate adhesive tape components. This integration eliminates the additional frame width contribution from adhesive tapes while maintaining secure fixation through structural design.
Solution Approach 2:
The invention transitions from a two-dimensional adhesive tape fixation method to a three-dimensional structural integration approach. The backplane incorporates vertical and lateral structural features that mechanically secure the LED light bar, providing fixation stability through dimensional integration rather than surface adhesion.
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 solution allows for a narrower frame, simplifies rework, and improves brightness uniformity by increasing the net point distribution area at vertex angles, eliminating dark corners and residual adhesive issues, thereby enhancing the display effect.
Implementation Method 1
The light guide plate can atomize linear light sources or point light sources into a uniform surface light source, then the light emitted from the light guide plate is diffused and deflected by a diffusion plate
Implementation Method 2
a reflecting plate at least equipped with reflecting parts covering a side-end face and a rear face
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The present invention discloses a backlight module and a display device. The backlight module includes a backplane, a reflector plate and an LED light bar, wherein the LED light bar includes a base and LED lights; the backplane includes a backplane main body part and a backplane side wall part; the reflector plate includes a reflector plate main body part and two reflector plate projections; the two reflector plate projections are respectively in contact with a first side face and a second side face of the base; the backplane side wall part is in contact with a third side face of the base; and the reflector plate main body part is in contact with a fourth side face of the base. In the technical solutions of the present application, the LED light bar can be fixed to the backplane without providing a fixing adhesive tape. In addition, in the technical solutions in the present application, by providing the light guide plate projections on the light guide plate main body, the net point distribution area in the surrounding of the corresponding vertex angles β is increased, and the brightness at the vertex angles β can be improved correspondingly, thus avoiding the occurrence of a dark corner on the display device.