Resilient Block Wall Prevents Light Leakage in Backlight Module
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Solution Overview
Problem
Current backlight modules experience light leakage due to gaps between the mold frame and the light guide plate, leading to reduced luminous efficacy, despite the use of white reflection plates which cannot completely reflect light back into the light guide plate.
Innovation Solution
A resilient block wall made of white rubber is integrated into the backlight module, securely engaging with the light guide plate and LED lights to prevent light leakage by reflecting light back into the light guide plate, improving luminous efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optic film assembly is made to extend straight to the edge of the light guide plate to prevent sliding, then the reliability of the optic film assembly is improved, but light leaks through gaps between the mold frame and the light guide plate
Solution Approach 1:
A resilient block wall is introduced as an intermediary component between the mold frame and the light guide plate. This block wall fills the gaps and prevents light from leaking through the spaces that would otherwise exist between these components, while still allowing the optic film assembly to extend to the edge for reliable positioning.
2Use of energy by moving object
If a white reflection plate is attached to the mold frame to reflect light back into the light guide plate, then luminous efficacy is improved, but light still leaks through gaps between the mold frame and the light guide plate
Solution Approach 1:
The resilient block wall combines multiple functions: it acts as a structural support element, fills the gaps between components, prevents light leakage, and provides a reflective surface to redirect light back into the light guide plate. This merging of functions resolves the contradiction by addressing both light leak and luminous efficacy simultaneously.
Solution Approach 2:
The resilient block wall serves as an intermediary that fills the gaps between the mold frame and light guide plate, preventing light from escaping through these spaces while still allowing the reflection plate to function effectively in redirecting light back into the light guide plate.
3Length of stationary object
If the width of the optic film assembly is reduced to achieve thin-frame design, then the device becomes thinner, but the optic film assembly becomes more prone to sliding off
Solution Approach 1:
The resilient block wall acts as an intermediary support structure that provides lateral support to the optic film assembly, preventing it from sliding off the edges. This allows the optic film assembly to be made narrower for thin-frame design while maintaining its positional stability and reliability.
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 resilient block wall effectively prevents light from escaping through gaps, enhancing the luminous efficacy of the backlight module by ensuring that light is fully utilized and reducing light leakage at the light incidence side.
Implementation Method 1
a resilient block wall that is arranged above the backlight source and a light incidence end of the light guide plate and is fixed to the mold frame by means of force-fitting, bonding, or snap fitting. The resilient block wall has a bottom face and a side face perpendicular to the bottom face. The bottom face and the side face are set in tight engagement with an upper surface of the light guide plate and the backlight source
Data Source
AI summary
The present invention provides a backlight module, which includes a backplane, a reflector plate arranged inside the backplane, a light guide plate arranged on the reflector plate, an optic film assembly arranged above the light guide plate, a backlight source arranged inside the backplane and corresponding to the light guide plate, a mold frame mounted to the backplane, and a resilient block wall that is arranged above the backlight source and a light incidence end of the light guide plate and is fixed to the mold frame by means of force-fitting, bonding, or snap fitting. The resilient block wall has a bottom face and a side face perpendicular to the bottom face. The bottom face and the side face are set in tight engagement with an upper surface of the light guide plate and the backlight source.