Protruding Diffuser Cover for Moving Head Light Fixture
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Solution Overview
Problem
The increasing visibility of multiple light sources in lighting fixtures, particularly in the entertainment industry, results in an unesthetic 'funfair' look, as customers prefer a more uniform and even light exit to avoid the cheap appearance of numerous LEDs, and existing solutions struggle to address this while maintaining technical specifications and creating appealing designs.
Innovation Solution
The implementation of a diffuser cover with both diffusing and non-diffusing regions in moving head lighting fixtures, which diffuses some light while allowing other light beams to pass through without diffusion, creating a 3-dimensional illuminated effect that can be viewed from multiple angles and used to create dynamic video displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources are used to replace a single light source, then the illumination coverage and brightness are improved, but the aesthetic appearance deteriorates due to the visible 'funfair' look of multiple light dots
Solution Approach 1:
A diffuser cover is introduced as an intermediary element between the multiple light sources and the external environment. The diffuser cover scatters and softens the light from individual LEDs, blending them into a uniform illumination pattern that eliminates the visible 'funfair' effect while preserving the enhanced brightness and coverage provided by multiple light sources.
Solution Approach 2:
The patent applies different optical properties to different regions of the light exit surface. By using a diffuser cover with varying diffusion characteristics across its surface, the patent creates local variations in light distribution that collectively produce a uniform overall appearance, masking the individual light source locations while maintaining high illumination intensity.
2Shape
If a diffuser cover is used to create uniform light exit, then the aesthetic appearance is improved, but the visibility of the light fixture itself increases making it more noticeable to spectators
Solution Approach 1:
The diffuser cover incorporates both diffusing regions and non-diffusing regions with different optical properties. The non-diffusing regions allow concentrated light beams to pass through, creating focused illumination that can be directed away from the fixture itself, while the diffusing regions provide uniform appearance. This spatial variation in optical properties allows the fixture to maintain aesthetic appearance while controlling its own visibility.
3Area of stationary object
If multiple light sources are exposed to the viewer, then the light emission area is increased, but the uniformity of light exit deteriorates creating a cheap 'funfair' look
Solution Approach 1:
The diffuser cover serves as a mediating optical element that receives light from multiple exposed light sources and transforms the discrete light patterns into a unified, uniform emission. The increased light emission area from multiple LEDs is preserved, while the diffuser cover ensures that the light appears to emanate uniformly from the entire surface area, eliminating the segmented 'funfair' appearance.
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 eliminates the 'dotted' look of multiple LEDs, providing a uniform light exit and allowing for new light effects by making the fixtures appear as 3-dimensional objects, enhancing their aesthetic appeal and functionality in matrix-controlled systems.
Implementation Method 1
The diffuser cover comprises at least one diffuser region (117) that receives and diffuses at least a part of the light generated by the light sources
Implementation Method 2
The diffuser cover comprises further at least one non-diffusing region (121) where through at least at part of said number of source light beams (113) pass without being diffused
Data Source
Figure 1a
Figure 1b~1c
Figure 2a~2b
AI summary
A moving head light fixtre with a base (103), a yoke (105) connected rotatably to the base and a head (107) connected ratably to the yoke. The head includes a number of light sources and a number of light collecting means arranged in the head. The light collecting means being total internal reflection (TIR) lenses, mixers or other lenses collect and convert light of the light sources into a number of light source beams. The beams are emitted from the head and pass a diffusion cover (415) with a diffusion cover diffusing at least part of the light generated by the light source The diffusion cover protrudes from the head and can include non-diffusing regions in the form of apertures (421 ) where the light pass without being diffused surrounded by diffusing regions (417 where the light passing the diffuser is diffused.