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AssigneeKoninklijke Philips Electronics N.V.
InventorsBernd Hofmann, Roger Jean Quirinus Van Den Plas
Estimating the term…
An illumination system (10), comprising an illumination source (2) and a mechanical dimming device (4) for dimming the amount of light generated by the illumination source (2) and emanating from the lighting apparatus, comprising an array of partially overlapping blades, the array of blades being mechanically operable to define an optical passageway there through of variable cross sectional area, wherein each blade comprises at least one overlapping segment and at least one non-overlapping segment, the overlapping segments being a color filter and the non-overlapping segments being a shutter. In a preferred embodiment the color of the color filter is in the range from yellow to amber to red. This arrangement is especially useful with a high intensity lamp as the illumination source, and provides for natural dimming of the light produced by the illumination source over the range of from about 0 to 100% causing a color change in the projected light that resemble natural sunset.
Illumination system, comprising an illumination source and a mechanical dimming device for dimming the amount of light generated by the illumination source and emanating from the lighting system, comprising an array of blades, the array of blades being mechanically operable to define an optical passageway therethrough of variable cross sectional area by progressively moving the blades into a light path so as to alter an amount of the light impinging thereon, wherein each blade comprises at least one overlapping segment and at least one non-overlapping segment, the overlapping segments being a color filter and the non-overlapping segments being a shutter, a leading edge of the blade adjacent the color filter.
An illumination attenuation device comprising a plurality of blades, each blade having a front segment having a leading edge and comprising a translucent color filter and a rear segment comprising an opaque shutter, the blades mountable downstream of a high-intensity light source for relative movement between an open position wherein at least some light passes through the blades without attenuation, through an intermediate position wherein front segments of adjacent blades overlap, admitting attenuated light therethrough, to a closed position wherein rear segments of adjacent blades abut so as to substantially block light from passing therethrough.
A method for attenuating illumination comprising:
Dependencies are inferred from the claim text.