Backlight Module Bezel Fixing Structure for Optical Film Stability
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Solution Overview
Problem
In display devices, the instability of light guide plates and optical films during use and transportation leads to issues like inclination, displacement, and poor display effects, especially in large-sized stand-up display devices where the optical film can slide downward, affecting the screen quality.
Innovation Solution
A backlight module design that includes a bezel with a fixing structure and protrusions on the dimming film layers, where the protrusions are engaged with slots and positioning pins to securely fix the light guide plate and optical film, preventing tilting and sliding, and ensuring a narrow bezel without the need for additional frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional frames are used to fix the light guide plate and optical film, then the stability of dimming film layers is improved, but the bezel width increases and the device becomes more complex
Solution Approach 1:
The patent combines the fixing function into the bezel itself by integrating fixing structures (engaging slots, positioning pins, limiting slots) directly into the bezel components. This merges the support and fixing functions into the existing bezel structure, eliminating the need for separate additional frames while maintaining stability of the dimming film layers.
2Reliability
If additional frames are used to secure the light guide plate and optical film, then the stability during transportation is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The fixing structures (engaging slots, positioning pins, limiting slots) are integrated directly into the bezel components, merging the fixing function with the existing structural elements. This eliminates the need for separate additional frames, simplifying the manufacturing process while ensuring reliability during transportation and use.
3Length of moving object
If the bezel structure is simplified to achieve a narrow bezel design, then the device compactness is improved, but the ability to securely fix the dimming film layers deteriorates
Solution Approach 1:
The patent applies local quality by concentrating fixing features (engaging slots, positioning pins, limiting slots) at specific critical locations within the narrow bezel structure. Rather than uniformly thickening the bezel, the fixing capability is localized to where it is most needed, maintaining narrow overall dimensions while ensuring secure fixation of the dimming film layers at key positions.
Data Source
AI summary
Embodiments of the present disclosure provide a backlight module and a display device. The backlight module includes: a backplane, a bezel, a protrusion and a plurality of dimming film layers, wherein the bezel is connected to the backplane and includes: a fixing structure and a plurality of bezel sidewalls on which the fixing structure is disposed, the fixing structure has an orthographic projection on the backplane located within an orthographic projection of the bezel sidewalls on the backplane, the plurality of bezel sidewalls and the backplane define an accommodation space in which the dimming film layers are provided, and the protrusion is fixedly disposed on a side surface of at least one of the dimming film layers and fixed to the bezel sidewalls via the fixing structure.