Truncated Cone Diffuser for LED COB Beam Control

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Solution Overview

Problem

Existing systems for achieving light effects in photography require significant user intervention and time to adjust the angle of the light beam, as the LED chip on board remains fixed and the lens is moved, leading to inefficiencies in telescopic or parabolic systems.

Innovation Solution

A system featuring a truncated cone diffuser housed on a heatsink with a fan for improved heat dissipation, combined with a movable LED chip on board matrix that varies the light beam's angle and intensity through longitudinal movement, allowing for more efficient and precise light control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the LED chip on board remains fixed and the lens is moved through telescopic mechanisms to vary the beam angle, then the light beam angle can be adjusted, but the operation time increases and user concentration is lost

Engineering Contradiction:

Improvebeam angle adjustmentVSAvoidadjustment time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

Instead of moving the lens relative to the fixed LED chip, the patent inverts the approach by moving the LED chip on board relative to the fixed lens. This is achieved through a movable platform that carries the LED chip on board along the optical axis, allowing beam angle variation without requiring complex telescopic lens mechanisms.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the complex telescopic lens mechanism with a simpler mechanical translation system. The LED chip on board is mounted on a movable platform that can be positioned along the optical axis, substituting the need for telescopic adjustments and reducing operational complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If multiple LED chips are used to create light effects, then lighting versatility is improved, but heat generation increases requiring additional cooling systems

Engineering Contradiction:

Improvelighting effectsVSAvoidheat dissipation

Core Design Contradiction:

Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent combines multiple LED chips onto a single on-board substrate, merging their functions while consolidating heat generation into one location. This allows versatile lighting effects from multiple chips while enabling centralized cooling through the heatsink and fan system mounted on the same platform.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The movable platform serves as an intermediary that carries both the LED chip on board and the cooling system (heatsink and fan). This intermediary structure allows the cooling components to be directly coupled with the heat-generating LED chips, improving thermal management efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the LED chip on board is made movable to vary beam angle, then operation efficiency is improved, but the system complexity increases

Engineering Contradiction:

Improveoperation efficiencyVSAvoidsystem structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the lighting system into distinct functional modules: the LED chip on board mounted on a movable platform, the heatsink and fan cooling system mounted on the same platform, and the fixed lens. This segmentation allows independent optimization of each module while simplifying the overall system architecture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The movable platform serves multiple functions simultaneously: it carries the LED chip on board, supports the cooling system (heatsink and fan), and enables positional adjustment along the optical axis for beam angle control. This multi-functionality reduces the need for separate components and simplifies the overall system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution enhances light beam homogeneity and reduces user intervention time by enabling precise control over the light beam's angle and intensity, improving overall efficiency and stability during photography operations.

Implementation Method 1

a thermal heatsink (5) on which a truncated cone diffuser (4) is assembled

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

a fan (7) in opposition

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 3

designed to diffuse the sum of at least one LED chip on board matrix (12) housed inside the diffuser device

Methodology Applied

Scientific EffectLight diffusion: Diffusion

Implementation Method 4

truncated cone diffuser (4) with one or more LED chips on board (12) inside

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentEP3508784B1Truncated cone diffuser for LED chip on board

Publication Date: 2020.05.27 GRISONI STEFANO

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AI summary

This invention concerns an instrument that is able to diffuse the sum of at least one LED chip on board matrix assembled on a heatsink, able to obtain a single light beam, varying its amplitude and intensity through a longitudinal movement forward and backward, with respect to the surface of the lens. This invention, being suitable for obtaining light effects, is applied in the field of photography, including film, television and other fields.