Backlight Module Through Hole Light Source Narrow Bezel
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Solution Overview
Problem
Current display modules have a wide lower frame due to the thickness of the side frame required for side-lit backlight modules, which hinders the achievement of a narrow bezel design.
Innovation Solution
A backlight module design featuring a back plate with a through hole for the light source, allowing the light guide plate and light source to be positioned within the back plate's cavity, eliminating the need for a side frame and reducing the overall frame thickness, and incorporating a flexible circuit board bent to attach to the back plate, enabling a narrower frame assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a side-lit backlight module is used with the light source disposed on the side of the back frame, then the backlight module can provide uniform illumination, but the thickness of the back frame becomes large, resulting in a large width of the lower frame of the display panel
Solution Approach 1:
The light source is relocated from the side dimension to the bottom dimension of the back frame. The light incident surface of the light guide plate is positioned at the bottom of the back frame, allowing light to enter from the bottom rather than from the side. This dimensional change enables the removal of the thick side frame structure while maintaining uniform illumination through the light guide plate.
Solution Approach 2:
The side frame structure is extracted and removed from the design. By positioning the light incident surface at the bottom of the back frame rather than on the side, the patent eliminates the need for a thick side frame, thereby reducing the overall width of the lower frame of the display panel.
2Ease of operation
If the thickness of the back frame is increased to accommodate the light source on the side, then the light source can be properly positioned, but the overall frame width increases, preventing narrow bezel design
Solution Approach 1:
The light source positioning is achieved in the bottom dimension rather than the side dimension. The light incident surface is disposed at the bottom of the back frame, allowing proper light source positioning without requiring increased frame thickness or width, thus enabling narrow bezel design.
3Ease of manufacture
If a traditional side-lit backlight structure is used, then the assembly is straightforward, but the lower frame width cannot be reduced below a certain threshold
Solution Approach 1:
The patent modifies the traditional side-lit structure by changing the light entry dimension from side to bottom. The light incident surface is disposed at the bottom of the back frame, which simplifies the assembly by eliminating the need for thick side frames while achieving the desired narrow lower frame width.
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 width of the lower frame, achieving a narrow bezel and enhancing the display module's aesthetic and functional capabilities.
Implementation Method 1
a light guide plate... a light incident surface of the light guide plate corresponds to the through hole
Data Source
AI summary
A backlight module and a display module are provided. The backlight module includes a back plate, a light guide plate, and a light source. The back plate includes a receiving cavity. One side of the back plate is formed with a through hole. The light guide plate is disposed in the receiving cavity. A light incident surface of the light guide plate corresponds to the through hole, the light source is disposed in the through hole, and the light source corresponds to the light incident surface of the light guide plate. By forming the through hole on one side of the back plate and providing the light source in the through hole, a side frame is not required to be provided, a thickness of a frame of the backlight module is reduced, and a narrow frame is realized.