Backlight Assembly Gap Adjustment Mechanism
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Solution Overview
Problem
In edge-illumination type backlight assemblies, manufacturing and assembly errors often lead to deviations from the optimal gap between the light guide plate and the receiving container, resulting in decreased display quality due to variations in luminance and color uniformity.
Innovation Solution
A gap adjusting element is introduced between the light source module and the light guide plate, allowing for adjustable spacing through a combination of extrusion bars, sliding guides, and self-locking mechanisms to maintain optimal gap dimensions, thereby compensating for manufacturing variances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed gap is maintained between the light guide plate and receiving container, then manufacturing precision is improved, but device complexity increases due to additional gap adjusting elements
Solution Approach 1:
The patent implements a dynamic adjustment mechanism that allows the gap between the light guide plate and receiving container to be adjusted after assembly. The adjusting element enables the light source module to move relative to the receiving container, transforming a static fixed-gap structure into a dynamic adjustable-gap structure. This resolves the contradiction by allowing initial simple assembly while providing post-assembly adjustment capability to achieve precise gap dimensions.
Solution Approach 2:
The adjusting element incorporates a self-locking mechanism that automatically maintains the adjusted gap position without requiring continuous external control. Once the gap is adjusted to the optimal dimension, the self-locking feature preserves this setting, eliminating the need for complex active control systems while maintaining manufacturing precision.
2Reliability
If the light source module is rigidly fixed to the receiving container, then device complexity is reduced, but reliability decreases due to inability to compensate for assembly errors
Solution Approach 1:
The patent replaces rigid fixed connections with a dynamic adjustment mechanism that allows positional adjustment of the light source module. This dynamic structure enables compensation for assembly errors and maintains optimal gap dimensions, thereby improving reliability of display quality while accepting increased structural complexity.
Solution Approach 2:
The adjusting element enables change in the gap parameter between the light guide plate and light source after assembly. By allowing this critical parameter to be adjusted and optimized, the system achieves consistent display quality across different manufacturing batches, improving reliability without requiring perfect initial manufacturing precision.
Data Source
AI summary
A backlight assembly includes a light guide plate, a light source module spaced apart by a gap from the guide plate, a receiving container and a gap adjusting element. The gap adjusting element is inter-coupled between the receiving container and the light source module and is actuatable to adjust the gap distance between the light source module and the light guide plate. Accordingly, a display quality may be prevented from being decreased, and the productivity may be enhanced.