Backlight Module Narrow Frame Assembly via Perforated Back Frame
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Solution Overview
Problem
Conventional display devices with narrow bezel designs face challenges in assembly accuracy and require finer mini-LED distribution to enhance color and contrast performance, while maintaining a narrow frame and effective fixing mechanism.
Innovation Solution
A backlight module design featuring a back frame with perforations, a light board with through portions, and a fixing frame with hook portions and gaps, allowing for precise engagement and assembly, which reduces the frame width and increases the light-emitting area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a narrow frame design is adopted to increase display area, then the display area is increased, but the assembly accuracy requirement increases and assembly difficulty increases
Solution Approach 1:
The frame structure is segmented into a back frame and a fixing frame, with the fixing frame having multiple positioning portions that extend into perforations of the back frame. This segmentation allows for modular assembly with built-in positioning features that guide components into correct positions, thereby reducing assembly difficulty while maintaining narrow frame design.
Solution Approach 2:
The positioning portions act as intermediary elements between the fixing frame and the back frame. These positioning portions extend into the perforations and work with the positioning holes in the light board to provide precise alignment and positioning, facilitating accurate assembly in the narrow frame structure.
2Illumination intensity
If smaller mini-LEDs are used to achieve finer local dimming effect, then the color and contrast performance is improved, but the assembly complexity increases
Solution Approach 1:
The light board is designed with a standardized structure that serves multiple functions: it carries the mini-LEDs, provides positioning holes for alignment with the fixing frame, and incorporates through portions for component engagement. This multi-functional design simplifies assembly by reducing the number of separate positioning and fixing operations needed, even when using smaller mini-LEDs for finer local dimming.
3Length of stationary object
If the light board is positioned closer to the edge to reduce frame width, then the frame width is reduced, but the positioning accuracy requirement increases
Solution Approach 1:
The positioning portions are pre-formed on the fixing frame, extending into the perforations of the back frame before assembly. The light board is designed with positioning holes that align with these pre-formed positioning portions. This preliminary preparation of positioning features ensures accurate positioning even when the light board is placed closer to the edge to reduce frame width.
Solution Approach 2:
The positioning mechanism utilizes the vertical dimension by having positioning portions extend into perforations through the thickness of the back frame. This three-dimensional positioning approach provides precise location control in all directions, enabling accurate positioning of the light board edge closer to the frame edge while maintaining positioning accuracy through the depth-based engagement of positioning portions in perforations.
Data Source
AI summary
A backlight module comprises a back frame with at least one perforation, a light board arranged on the back frame, a plurality of light-emitting elements arranged on the light board at intervals, a fixing frame combined with the back frame, and a plurality of optical films stacked on the fixing frame. The light board has at least one through portion, and the position of the through portion corresponds to the at least one perforation of the back frame. A part of the fixing frame is positioned in the at least one perforation of the back frame through the at least one through portion of the light board. The effect of a narrow frame can be effectively achieved by arranging the joint part of the fixing frame and the back frame on the inner side of the back frame and forming the through portion on the edge of the light board to be engaged with the joint part of the fixing frame and the back frame. The present invention also provides a display device comprising the backlight module.