Light Guide Lens Radial Microstructures Thin Profile
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Solution Overview
Problem
Conventional light guide lenses face a trade-off between reducing thickness and maintaining the breadth of the light emitting angle, where thinner lenses compromise the light emitting angle, making it challenging to achieve a desired lens thickness without sacrificing light distribution.
Innovation Solution
A light guide lens with microstructure members on its incident surface, extending radially and oriented to a microstructure center, which refracts light to increase the light emitting angle while maintaining a thin profile, allowing for efficient light mixing and reduced optical path length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the thickness of the light guide lens is reduced, then the optical path length is shortened and the device is thinned, but the breadth of the light emitting angle deteriorates
Solution Approach 1:
The light guide lens is segmented into multiple functional regions: a first region with a light incident surface, a second region with a light exiting surface, and a third region with microstructure members. This segmentation allows each region to perform its specific function optimally, enabling the lens to maintain a thin profile while preserving light emitting angle through the specialized microstructure region.
Solution Approach 2:
The invention transitions from a conventional two-surface lens design to a three-region design that incorporates microstructure members as an additional functional dimension. The microstructure members extend in a third dimension (radially outward from the optical axis), creating new light guiding paths without increasing the overall lens thickness, thus resolving the contradiction between thinness and light emitting angle.
2Length of stationary object
If the thickness of the light guide lens is reduced, then the device becomes more compact, but the light mixing performance deteriorates
Solution Approach 1:
The microstructure members are strategically positioned in a third region between the light incident surface and light exiting surface, creating a localized area for enhanced light mixing. This local quality enhancement allows effective light mixing to occur in a compact space without requiring the entire lens to be thick, thus maintaining both thinness and light mixing performance.
Solution Approach 2:
The microstructure members act as an intermediary element that facilitates light mixing in a thin lens configuration. These structures provide additional light guiding paths and increase the interaction between light rays, enabling effective light mixing without requiring a thick lens, thereby resolving the contradiction between thickness and light mixing performance.
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 microstructure members enhance the light emitting angle and radiation pattern, enabling a thinner light guide lens design that maintains or even broadens the light emitting angle, reducing the light-mixing distance and allowing for a more compact display apparatus without sacrificing performance.
Implementation Method 1
Light emitted from the LED 10 is first refracted at the light incident surface 12, and then refracted again at the cambered light exiting surface 13
Implementation Method 2
a plurality of microstructure members formed on the light incident surface and extending radially and being oriented to a microstructure center
Data Source
AI summary
A light guide lens includes a main body. The main body includes a light exiting surface, a light incident surface opposite to the light exiting surface, and a plurality of microstructure members formed on the light incident surface and extending radially and being oriented to a microstructure center. A light emitting module and a display apparatus is also included.