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US 7,401,944 B2Granted
Operating room light fixture having two light sources and a control unit
AssigneeDräger Medical AG & Co. KGaA
InventorsMargret Hünerbein, Ryzard Kummerfeld, Georg Schlör, Joachim Schröter, Ingolf Diez
Life of this patent
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Abstract
An operating room light fixture having a first lighting unit including a first light source and an external reflector, a second lighting unit including a second light source and an internal reflector, and a control unit. The second lighting unit is positioned in front of the first lighting unit with respect to the direction in which the light emerges from the light fixture. The control unit may be actuated by a rotary element located in a handle of the light fixture. A heat reflection filter may be provided for adjusting the color temperature of the light fixture to a desired value.
Claims20
An operating room light fixture comprising:
- a light fixture housing having a light emitting side and an axial light emitting direction;
- a first lighting unit supported by said light fixture housing and having a radially centrally located first light source and a first lighting unit reflector radially outward of said first light source and directing emitted light axially outwardly for generating an even surface light;
- a second lighting unit supported by said light fixture housing, said second lighting unit being arranged axially after said first lighting unit in the axial light emitting direction in which the light emerges, said second lighting unit having a second light source substantially coaxial with said first light source disposed in an axial path between said first light source and said light emitting side and a second lighting unit reflector radially outward of said second light source and radially inward of said first lighting unit reflector and directing emitted light axially outwardly for generating an additional in-depth concentrated illumination;
- a control element having a single control actuation range;
- and
- a control unit for controlling a luminous intensity of said first light source and said second light source based on a state of said control element with respect to said single control actuation range to provide a preset luminous intensity control curve corresponding to said control actuation range.
3 more elements
An operating room light fixture comprising:
- a light fixture housing having a light emitting side and with an axial light emergence direction, said light fixture housing having a central axis extending in said axial light emergence direction;
- a first lighting unit supported by said light fixture housing and having a first light source with a first light source axis coaxial with said central axis for emitting light at least radially and a first lighting unit reflector radially outward of said first light source and directing radially emitted light for generating an even surface light directed in said axial light emergence direction;
- a second lighting unit supported by said light fixture substantially coaxial with said first light source and in a direct axial path along said central axis after said first light source in said axial light emergence direction for emitting light at least radially and a second lighting unit reflector radially outward of said second light source and radially inward of said first lighting unit reflector and directing radially emitted light axially outwardly for generating an additional in-depth illumination substantially in a direction coaxial with said light emergence direction;
- a single control element having a single control actuation range and having a handle for manually changing a state of said control element within said control actuation range, said handle being disposed extending in said axial light emergence direction from said light emitting side and being substantially coaxial with said first light source and said second light source and being in a direct axial path along said central axis after said first light source and after said second light source in said axial light emergence direction;
- and
- a control unit linking said second lighting unit with variable luminous intensity to said first lighting unit based on a state of said control element with respect to said control actuation range and a control curve for controlling a luminous intensity of said first light source and said second light source based on a state of said control element with respect to said control actuation range, said control curve being set via said control unit, said control curve having a first curve portion in which said first lighting unit contributes to the total luminous intensity emitted to illuminate the operating area in a first luminous intensity range of said control actuation range and said control curve having a second curve portion in which said second lighting unit is superimposed to said first lighting unit in a second illumination range of said control actuation range.
3 more elements
An operating room light fixture comprising:
- a light fixture housing having a light emitting side and with an axial light emergence direction, said light fixture housing having a central axis extending in said axial light emergence direction;
- a first lighting unit supported by said light fixture housing and having a first light source having a first light source axis coaxial with said central axis for emitting light one of radially or radially and axially and a first lighting unit reflector radially outward of said first light source and directing radially emitted light for generating an even surface light directed in said axial light emergence direction;
- a second lighting unit supported by said light fixture and arranged after said first lighting unit with respect to said axial light emergence direction, said second lighting unit having a second light source emitting light one of radially or radially and axially and disposed substantially coaxial with said first light source and in a direct axial path along said central axis after said first light source in said axial light emergence direction and a second lighting unit reflector radially outward of said second light source and radially inward of said first lighting unit reflector and directing radially emitted light axially outwardly for generating an additional in-depth illumination substantially in a direction coaxial with said light emergence direction;
- a control element having a control actuation range;
- and
- a control unit lining said second lighting unit with variable luminous intensity to said first lighting unit based on a state of said control element with respect to said control actuation range and a control curve for controlling a luminous intensity of said first light source and said second light source based on a state of said control element with respect to said control actuation range, said control unit varying the luminous intensity of said first light source from no luminous intensity to a maximum luminous intensity with no luminous intensity of said second light source by movement of said control element in a first portion of said control actuation range and said control unit varying the luminous intensity of said second light source from no luminous intensity to a maximum luminous intensity with a maintained maximum luminous intensity of said first source by movement of said control element in a second portion of said control actuation range to vary the superposition of said additional in-depth concentrated illumination on said even surface light.
3 more elements
Dependencies are inferred from the claim text.