Downlight Light Guide Cup Uniform Illumination
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Solution Overview
Problem
Current downlights with LED light sources face issues of directional characteristics causing visual glare and non-uniform illuminance, necessitating improvements in design to enhance the overall lighting effect.
Innovation Solution
A downlight apparatus featuring a main cup housing with a driver circuit for two LED sets and a light guide cup with a top and bottom part, where the first LED set generates a central luminous effect and the second LED set's light is guided through the light guide cup to create a specific light output pattern, allowing for independent operation and varying optical characteristics, and incorporating a compound lens structure and reflective layers for improved light distribution and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If LED light sources are used in downlights, then energy efficiency and lifetime are improved, but directional characteristics cause visual glare and non-uniform illuminance
Solution Approach 1:
A light guide cup is introduced as an intermediary component between the LED light source and the viewing area. The light guide cup receives light from the LED, guides it through its structure, and outputs it through a light output pattern that distributes light more uniformly, thereby reducing visual glare while maintaining the long lifetime benefit of LED sources
Solution Approach 2:
The patent changes the optical parameters of light delivery by using the light guide cup to modify light direction and distribution. The light output pattern on the internal surface of the light guide cup transforms the directional LED light into a more diffuse, uniform illumination, addressing the glare issue while preserving LED longevity
2Illumination intensity
If reflectors and anti-glare structures are added to improve luminance effect, then overall lighting effect is improved, but device complexity increases
Solution Approach 1:
The light guide cup integrates multiple functions into a single component: it guides light, creates the light output pattern, and provides anti-glare characteristics. This merging of functions achieves improved luminance effect without requiring separate reflectors and anti-glare structures, thus avoiding the complexity increase that would result from adding multiple discrete components
3Adaptability or versatility
If multiple LED sets with different characteristics are used, then operational versatility and lighting scenarios are improved, but device complexity and cost increase
Solution Approach 1:
The lighting system is segmented into multiple independent LED sets (first LED set and second LED set) that can be controlled separately. This segmentation enables different operational scenarios and lighting effects while maintaining relatively simple circuit design through independent control of each LED set, allowing users to select appropriate lighting modes without requiring complex integrated control systems
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 increases the beam angle of light, provides a beautiful and uniform lighting effect, reduces glare, and offers flexible operation scenarios by enhancing the luminous uniformity and aesthetic appeal, addressing the limitations of existing LED downlights.
Implementation Method 1
The light enters the light guide cup and escapes from the light output pattern
Implementation Method 2
A light output pattern is formed on internal surface of the light guide cup between the top part and the bottom part
Implementation Method 3
incorporating a compound lens structure and reflective layers for improved light distribution and heat dissipation
Implementation Method 4
incorporating a compound lens structure and reflective layers for improved light distribution
Implementation Method 5
The cavity may be filled with transparent heat dissipation material for helping heat dissipation
Data Source
AI summary
A downlight apparatus has a main cup housing, a driver circuit, a first LED set, a second LED set and a light guide cup. The driver circuit is contained in the main cup housing for converting an external power to a driving current. The first LED generates a central luminous effect. The light guide cup has a top part and a bottom part. A light output pattern is formed on internal surface of the light guide cup between the top part and the bottom part. The top part receives a light of the second LED set. The light enters the light guide cup and escapes from the light output pattern.