Directional LED Light Distribution Structure for Uniform Illumination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Directional LED light sources exhibit uneven light distribution, resulting in high central intensity with stepped drops, yellow spots, and stray light outside the beam angle, requiring a new light distribution structure to match the original product's light environment.
Innovation Solution
A primary light distribution structure for a directional light source comprising a lamp cup, heat conducting plate, power source, light source plate, and a lens structure with multi-point or small lenses, where the heat conducting plate is made of aluminum and connected via self-tapping screws, ensuring even light distribution and eliminating yellow spots and black dots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a traditional directional LED light source is used, then the light source provides directional illumination, but the light distribution is uneven with high central intensity and stepped drops
Solution Approach 1:
The light distribution structure is segmented into multiple functional components: a lamp cup for mounting, a heat conducting plate for thermal management, and a lens structure with multiple lens units for light redistribution. Each segment performs a specific function to collectively achieve uniform light distribution while maintaining directional illumination.
Solution Approach 2:
The lens structure acts as an intermediary between the LED light source and the illuminated object. It redistributes the light rays from the high-intensity central region to create a more uniform illumination pattern, effectively mediating the light distribution without requiring changes to the LED source itself.
2Illumination intensity
If a traditional directional LED light source is used, then the light source provides focused illumination, but yellow spots and black dots appear on the illuminated object
Solution Approach 1:
The lens structure serves as an intermediary that corrects the light distribution before it reaches the illuminated object. By refracting and redistributing light rays, it eliminates the formation of yellow spots (overly concentrated light) and black dots (light-deficient areas) on the target surface.
Solution Approach 2:
The lens structure changes the spatial distribution parameters of the light rays. It transforms the concentrated light pattern from the LED into a more uniform distribution pattern, altering the intensity parameters across the illuminated area to eliminate harmful spots and shadows.
3Illumination intensity
If a traditional directional LED light source is used, then the light source provides directional beam, but stray light is emitted outside the beam angle
Solution Approach 1:
The lens structure acts as an intermediary that controls and redirects stray light. It captures light rays that would otherwise escape the intended beam angle and redirects them into the correct directional path, reducing stray light emission while maintaining the directional beam characteristic.
Solution Approach 2:
The lens structure modifies the angular distribution parameters of the emitted light. It concentrates light rays within the desired beam angle and redirects those that would become stray light, effectively changing the spatial angular parameters to minimize harmful stray light emission.
4Illumination intensity
If the light distribution structure is modified to achieve even light distribution, then the beam angle increases, but the structural complexity increases
Solution Approach 1:
The complex light distribution function is segmented into multiple simple lens units, each with a specific function. This segmentation allows the system to achieve a larger beam angle and uniform light distribution while keeping each individual component relatively simple and manageable.
Solution Approach 2:
The integrated light distribution structure combines multiple functions into a single assembly: the lamp cup provides mechanical support and mounting, the heat conducting plate manages thermal energy, and the lens structure performs light redistribution. This multi-functionality reduces the need for separate components, thereby managing structural complexity while achieving the desired beam angle and uniformity.
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 provides a larger beam angle with even light distribution, eliminating light gradients and stray light, thus meeting the requirements for a uniform light environment.
Implementation Method 1
a heat conducting plate, disposed inside the lamp cup and located at a middle portion of the lamp cup
Implementation Method 2
a lens structure, covering on the light source plate... a multi-point lens directly facing the light source plate
Data Source
AI summary
The present invention discloses a primary light distribution structure of a directional light source comprises a lamp cup, wherein the lamp cup is provided with a lamp cap at an end; a heat conducting plate, disposed inside the lamp cup and located at a middle portion of the lamp cup, the periphery of the heat conducting plate being in interference fit with and connection with the lamp cup; a power source, disposed inside the lamp cup and located between the lamp cup and the heat conducting plate, the power source being connected to the lamp cap; a light source plate, fixed to the heat conducting plate by means of a plurality of screws, the power source being electrically connected to the light source plate; and a lens structure, covering on the light source plate. In the present invention, the primary light distribution structure is configured such that a larger beam angle is available.