Height Adjustable Back-Light Module Frame for Uniform Lighting
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Solution Overview
Problem
Back-light modules for liquid crystal displays using LEDs face challenges in achieving uniform lighting while maintaining cost-effectiveness, as multiple LEDs are required for a uniform lighting effect, leading to increased costs.
Innovation Solution
A back-light module design featuring a height-adjustable frame with detachable frame units, secondary optical lenses made from transparent materials like PMMA or PC plastic, and an optical film to unify and distribute light evenly, allowing for customizable light-mixing distance and improved lighting uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a plurality of LEDs are used to achieve uniform lighting effect, then lighting uniformity is improved, but cost increases
Solution Approach 1:
The back frame is divided into multiple detachable frame units that can be assembled in different quantities. This segmentation allows the light-mixing chamber volume to be adjusted without changing the LED configuration, achieving uniform lighting with fewer LEDs by optimizing the mixing chamber design rather than increasing LED quantity
Solution Approach 2:
The patent changes the parameter of light-mixing chamber volume by adjusting the number of frame units. This parameter change optimizes light distribution and mixing efficiency, enabling uniform lighting effect with reduced LED quantity and lower cost
2Illumination intensity
If multiple LEDs are used to achieve uniform lighting, then lighting uniformity is improved, but device complexity increases
Solution Approach 1:
The back frame is segmented into detachable frame units with standardized connection structures. This segmentation simplifies the overall structure by using modular components rather than a complex integrated design, while the adjustable configuration optimizes light mixing for uniformity
Solution Approach 2:
The back frame structure is made dynamic and adjustable through detachable frame units that can be configured in different quantities. This dynamic design allows optimization of light mixing characteristics without requiring complex fixed structures or multiple LED arrays
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 solution enhances lighting uniformity and reduces costs by utilizing a modular design that adjusts light-mixing distance and employs optical lenses to distribute light evenly, addressing the need for multiple LEDs while maintaining efficiency and environmental sustainability.
Implementation Method 1
secondary optical lenses made from transparent materials like PMMA or PC plastic
Data Source
AI summary
A back-light module includes a back board. The back board includes a substrate and a plurality of frame monomers. Each frame monomer comprises four lateral ribs, every two adjacent lateral ribs are perpendicularly connected with each other. The frame monomers are detachably assembled to each other to form a height adjustable back frame, and the height adjustable back frame is assembled with the substrate to form a height adjustable light-mixing chamber.