Backlight Back Plate Hollow Structure for Light Bar Mounting
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Solution Overview
Problem
The assembly of backlight modules with U-bent structures is challenging due to small openings, leading to inaccurate positioning and deformation of light bars, which affects luminous efficiency.
Innovation Solution
A back plate with a main body portion and an extension portion, featuring a hollow structure that allows for accurate mounting of light bars, ensuring the LED chip passes through and aligns with the light guide plate for improved luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a U-bent structure with small opening is used for the back plate, then the structural compactness is improved, but the ease of assembly deteriorates due to difficulty in inserting light bars
Solution Approach 1:
The back plate is divided into a main body portion and an extension portion that can be independently assembled. The extension portion with its larger opening allows easy insertion of light bars, while the main body portion provides the compact U-bent structure. This segmentation resolves the contradiction by separating the assembly function from the structural function.
Solution Approach 2:
The extension portion is designed to fold back and nest within the U-bent structure of the main body portion. This nesting approach allows the back plate to achieve a compact form factor when assembled, while the extension portion temporarily provides a larger opening during the assembly process to facilitate light bar insertion.
2Volume of moving object
If a U-bent structure with small opening is used for the back plate, then the structural compactness is improved, but the manufacturing precision deteriorates due to inaccurate positioning and deformation of light bars
Solution Approach 1:
By separating the back plate into main body and extension portions, the assembly process can be optimized. The extension portion's larger opening allows light bars to be inserted without deformation, ensuring proper positioning. The main body portion then provides the compact structure, maintaining both precision and compactness.
Solution Approach 2:
The extension portion is designed to perform the preliminary action of facilitating light bar insertion with its larger opening before the final compact structure is formed. This preliminary action ensures accurate positioning and prevents deformation, which would be difficult to achieve with a small opening in the final compact configuration.
3Volume of moving object
If a U-bent structure with small opening is used for the back plate, then the structural compactness is improved, but the luminous efficiency deteriorates due to deformation of light bars
Solution Approach 1:
The segmentation of the back plate allows the extension portion to provide a large opening for undistorted light bar installation, ensuring high luminous efficiency. The main body portion then provides the compact U-bent structure, thus resolving the contradiction between compactness and luminous efficiency.
Solution Approach 2:
The extension portion performs the preliminary function of accommodating the light bar in its undeformed state during assembly. This preliminary action preserves the light bar's integrity and luminous efficiency, while the subsequent folding creates the compact final structure without compromising the light bar's performance.
Data Source
Figure 1~3
Figure 4A~4C
Figure 4D
AI summary
A back plate, a backlight module, a display device, and an assembly method of the backlight module are provided. The backlight module includes: a back plate, including a main body portion (1), the main body portion (1) having a first main surface (101) and a second main surface (102) opposite to each other; and the main body portion (1) being provided with a hollow structure (3); a light source (4), passing through the hollow structure (3) from a second main surface side of the main body portion (1); a light guide plate (5), provided on the first main surface side of the main body portion (1) of the back plate, wherein, the light-emitting portion of the light source (4) includes a light emergent surface, and the light emergent surface faces a light incident surface of the light guide plate. The backlight module can make the light source have accurate positioning and ensure the illumination efficiency.