Backlight Frame Elastic Member Gap Elimination
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Solution Overview
Problem
Conventional backlight modules for LCD devices suffer from manufacturing inaccuracies leading to gaps between LEDs and the light guide plate, which reduce luminance and are exacerbated by vibrations, resulting in inconsistent light emission.
Innovation Solution
Incorporating elastic members that are detachably engaged with the frame and light guide plate to ensure the LEDs abut the light incident surface without gaps, using elastic sheets formed by stamping procedures to maintain close contact and improve luminance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rigid frame structure is used to accommodate light guide plate and LEDs, then manufacturing simplicity is maintained, but gaps between LEDs and light incident surface occur due to manufacturing imprecision, reducing luminance efficiency
Solution Approach 1:
The patent changes the physical state of the frame from rigid to elastic by using elastic members (such as elastic sheets or rubber materials) instead of conventional rigid plastic frames. This parameter change allows the frame to dynamically adjust and eliminate gaps between LEDs and the light incident surface, improving manufacturing precision without significantly increasing device complexity
Solution Approach 2:
The patent employs composite material structure by combining elastic members with the rigid frame body. The elastic members are integrated into the frame structure at specific positions where gap elimination is needed, creating a composite system that maintains overall structural rigidity while providing localized flexibility for precise LED positioning and gap elimination
2Reliability
If rigid frame structure is used, then structural stability is maintained, but gaps are enlarged by shaking or vibration during assembly or use, reducing emitting luminance
Solution Approach 1:
The patent introduces dynamic characteristics to the frame structure by incorporating elastic members that can flex and adapt to vibrations and shaking. Unlike rigid frames that maintain fixed positions and allow gaps to enlarge under vibration, the elastic members dynamically adjust their position to maintain continuous contact between LEDs and the light incident surface, ensuring consistent luminance reliability under varying mechanical conditions
3Manufacturing precision
If precise manufacturing is implemented to eliminate gaps, then luminance efficiency is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent applies beforehand cushioning by pre-installing elastic members within the frame structure during frame manufacturing. These elastic members are positioned in advance to compensate for potential manufacturing imprecisions and assembly variations. During final assembly, the elastic members automatically adjust to eliminate gaps without requiring precision alignment procedures, thereby maintaining high LED positioning accuracy while simplifying the assembly process
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
The elastic members effectively reduce or eliminate gaps between LEDs and the light guide plate, enhancing brightness and uniformity of light emission while allowing for easy installation and detachment, thus improving the overall performance of the backlight module.
Implementation Method 1
at least one elastic member. The at least one elastic member is detachably engaged with the at least one side wall of the frame, and is configured to elastically urge at least one of the at least one light emitting unit, the at least one side wall, and the light guide plate such that the at least one light emitting unit abuts the light incident surface of the light guide plate
Data Source
AI summary
An exemplary backlight module (20) includes a light guide plate (250) including a light incident surface (251), a frame (280) accommodating the light guide plate and including a side wall (281), light emitting units (270) adjacent to the light incident surface of the light guide plate, and elastic members (240). The elastic members are detachably engaged with the side wall of the frame. Each elastic member is configured to elastically urge a corresponding light emitting unit such that the light emitting unit abuts the light incident surface of the light guide plate. In other examples, each elastic member elastically urges the side wall of the frame, or elastically urges the light guide plate. A liquid crystal display device using the backlight module is also provided.