Spiral and Concentric Groove Optical Component for LED Uniformity
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Solution Overview
Problem
LEDs have a narrow lighting surface and high directivity, leading to reduced luminous intensity at increased distances, making them unsuitable for large area lighting due to their point-like light source nature, which limits their application to short-distance and small area fixtures.
Innovation Solution
The design incorporates a light-transmitting body with a first optical unit featuring concentric circular surrounding structures and a second optical unit with a spiral structure, where the main light beam is reflected to form a projection light source, enhancing light-mixing effect and uniformity by increasing the relative height of the spiral structure from inner to outer, and using a light-reflecting ring to manage glare and improve light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED is used as point-like light source, then lighting surface is narrow and directivity is high, but lighting area is limited and light distribution is non-uniform
Solution Approach 1:
The patent divides the optical component into multiple functional segments: a light-transmitting body with concentric circular grooves on the bottom surface and a spiral groove on the top surface. These segmented structural elements work together to redirect and distribute light from the point source across a larger area, resolving the contradiction between narrow lighting surface and limited lighting area.
Solution Approach 2:
The patent introduces dimensional complexity by adding concentric circular grooves in the horizontal plane and a spiral groove in the vertical dimension. This multi-dimensional groove structure enables light to be redirected in multiple directions simultaneously, expanding the lighting area while maintaining the point-source configuration.
2Illumination intensity
If LED is used as point-like light source, then directivity is high, but light uniformity is poor
Solution Approach 1:
The patent applies local quality by creating concentric circular grooves at different radial positions from the light source. Each groove acts as a local light redirecting element, with inner grooves handling central light and outer grooves handling peripheral light. This localized structural variation ensures uniform light distribution across the entire output surface.
Solution Approach 2:
The patent employs curved surfaces in the form of concentric circular grooves and a spiral groove structure. These curved geometries effectively redirect light rays at multiple angles, transforming the directional point-source light into a more uniform distributed light pattern across the output surface.
3Manufacturing precision
If concentric circular grooves and spiral groove are added to optical component, then light mixing effect and uniformity are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple light redirecting functions into a single integrated optical component. The light-transmitting body combines concentric circular grooves on its bottom surface with a spiral groove on its top surface, creating a unified structure that performs multiple light distribution functions simultaneously, thereby reducing overall device complexity despite the intricate groove patterns.
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
This configuration enhances light uniformity and mixing, increasing the effective lighting area and reducing glare, while maintaining a compact design that minimizes material and weight costs, thus overcoming the limitations of traditional LED lighting in terms of distance and coverage.
Implementation Method 1
a main light beam generated by a light-emitting module disposed under the light input surface of the first optical unit passes the first surrounding surface of each surrounding structure and is reflected by the second surrounding surface of each surrounding structure, to form a main projection light source passing through the light output surface of the light-transmitting body
Implementation Method 2
An optical component comprising a light-transmitting body with a first optical unit having concentric circular structures and a second optical unit with a spiral structure, which refracts and reflects light beams to create a main and auxiliary projection light source
Data Source
AI summary
An illumination device includes an optical component and a light-emitting module. The optical component includes a light-transmitting body, a first optical unit, and a second optical unit. The first optical unit has a light input surface and a plurality of surrounding structures surrounding the light input surface and arranged in a pattern of concentric circles, and each surrounding structure has a first surrounding surface and a second surrounding surface. The second optical unit has a spiral structure surrounding the light output surface of the light-transmitting body and a surrounding frame surrounding the light output surface of the light-transmitting body and the spiral structure, and a relative height from a topmost surface of the spiral structure to the light output surface of the light-transmitting body is increased gradually from inner to outer. The light-emitting module is disposed under the light input surface of the first optical unit.