Multi-Color LED Fixture Beam Angle Matching to Eliminate Halos

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Solution Overview

Problem

Multi-color lighting systems produce combined light beams with unwanted light characteristics due to differing beam angles, resulting in undesirable halos on the perimeter of the combined beam.

Innovation Solution

A light fixture with clusters of LED-optics units and a controller that adjusts the beam angles of individual light beams to ensure they fall within a controlled range, using a lookup table to manage current distribution based on beam angle values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If light beams with different beam angles are combined in a multi-color lighting system, then the system can provide multiple colors, but unwanted halos appear on the perimeter of the combined beam

Engineering Contradiction:

Improvemulti-color capabilityVSAvoidunwanted halos

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent adjusts the beam angle parameter of individual light beams by controlling the current distribution to LED-optics units. The controller modifies beam angle parameters dynamically to ensure all light beams within a cluster have matching beam angles, thereby eliminating halo formation while preserving multi-color capability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements dynamic control of beam angles through real-time current adjustment to LED-optics units. The controller continuously adapts the beam angle parameters based on operational conditions, allowing the system to maintain optimal beam angle matching across different color combinations and operational states

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If the combined light is limited by the narrower of two light beams, then the beam angle is controlled, but the wider beam angle light beam forms an undesirable halo

Engineering Contradiction:

Improvebeam angle controlVSAvoidhalo formation

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The patent changes the beam angle parameter of the wider beam by adjusting current distribution to LED-optics units, transforming it to match the narrower beam's angle. This parameter adjustment eliminates the halo effect while maintaining the intended lighting function

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The controller implements feedback control by monitoring beam angle characteristics and adjusting current distribution accordingly. The system detects beam angle deviations and applies corrective current adjustments to LED-optics units to maintain precise beam angle matching and prevent halo formation

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12563656B2Beam angle matching for multi-color fixtures

Publication Date: 2026.02.24 SIGNIFY HOLDING BV

AI summary

A method of controlling light beam angles of light beams provided by a light fixture includes obtaining a narrowest and a widest beam angle values of a beam angle of a first light beam provided by a first cluster of LED-optics units and obtaining a narrowest and a widest beam angle values of a beam angle of a second light beam provided by a second cluster of LED-optics units. The method also includes controlling the first and second clusters of LED-optics units such that the beam angles of the first light beam and the second light beam are bound by a smaller one of the narrowest beam angle values of the beam angles of the first light beam and the second light beam and by a smaller one of the widest beam angle values of the beam angles of the first light beam and the second light beam.