EP1568938A1 - Surgical lamp and method of illumination of an operating theatre - Google Patents
Surgical lamp and method of illumination of an operating theatre Download PDFInfo
- Publication number
- EP1568938A1 EP1568938A1 EP04018642A EP04018642A EP1568938A1 EP 1568938 A1 EP1568938 A1 EP 1568938A1 EP 04018642 A EP04018642 A EP 04018642A EP 04018642 A EP04018642 A EP 04018642A EP 1568938 A1 EP1568938 A1 EP 1568938A1
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- European Patent Office
- Prior art keywords
- light
- surgical
- color temperature
- dimming
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/40—Hand grips
- F21V21/403—Hand grips for operation or dentist lamps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/20—Lighting for medical use
- F21W2131/205—Lighting for medical use for operating theatres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
- F21Y2113/10—Combination of light sources of different colours
- F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a surgical light, as for example by DE 198 38 627 A1 has become known.
- the dimming of a surgical light or a medical light is done to avoid dazzling the surgeon at different Fabric colors.
- Light skin and white adipose tissue lead to a high Reflection. Red tissue absorbs a lot of light and therefore appears darker.
- Dimming is also used to compensate for fatigue effects of the Used by the surgeon. An operation begins in dimmed Condition of the lamp. Light reserves can contribute to the fatigue of the eye compensate for decreasing sensitivity in the course of surgery.
- the surgeon needs to lifelike perception and optimal Judgment of the illuminated objects independent of the brightness, as constant as possible lighting properties of the lamp.
- bulbs in a medical lamp come predominantly Halogen or gas discharge lamps or LEDs are used. All However, these bulbs have the property that in the electrical / electronic dimming the color temperature of the light strong changed.
- the human eye is used to daylight.
- the sight is on the Adapted daylight.
- the human eye detects most exact contours, differs in the most differentiated colors and detects movements most clearly.
- a spectral distribution can be assigned a color temperature become.
- daylight has a color temperature of 5,600 Kelvin.
- Kruithoffs Comfort curve the color temperature with the illuminance must be adjusted to a pleasant lighting situation create.
- the light in the operating room becomes white with a light Color temperature of about 4,500 Kelvin at high illuminance levels (> 100,000 lux) is recommended.
- the ideal color temperature is predominantly due to the use of achieved known color conversion filters. Instead of the color conversion filters It is also known to correct the color temperature, the white light to mix colored light.
- the Applicant has set itself the task, the lighting conditions to improve in operations, with a dimming of a surgical light, by a color temperature change and the color rendering change to avoid occurring disadvantages and at a constant brightness the Adjust color temperature and color reproduction.
- a mixed light with adjustable photometric data can be generated.
- the electrical parameters of the dimming in the Control electronics are deposited so (for example, map, characteristic) that at a stepless change in brightness the preselected Color temperature and color reproduction are kept constant,
- a control device in conjunction with corresponding sensors can do it allow a desired color temperature and / or Color reproduction adjusted and monitored, as well as readjusted and at a defined brightness can be kept constant.
- control device allows the surgeon, individually on his needs adjusted lighting conditions in the surgical field to accomplish.
- lighting conditions in the surgical field Depending on the color temperature or color reproduction Highlighting of different tissue structures or Tissue features possible within the surgical site.
- the dimming can be achieved by mechanical and / or optical means become.
- a dimming can be caused by a change of the LED electric current and / or the electrical voltage can be generated.
- apertures, lenses or optical filters, which in the Beam path are moved into it, a change in the luminous flux cause.
- the color temperature or the color reproduction remains at one mechanical dimming constant.
- the operating light 1 comprises a lamp body 2, which has in its interior in Fig. 1 not visible lighting means.
- the lamp body 2 is pivotally mounted on a stationary bracket on a ceiling or a wall of a building or a mobile unit via a not completely shown in Fig. 1 pivot arm.
- the swivel arm is composed of several interconnected via joints elements.
- a fixedly connected to the operating light 1 element 4 of the pivot arm is indicated in Fig. 1 only. Therefore, the operation lamp 1 can be three-dimensionally moved and pivoted in X, Y, Z direction.
- a mounted on the lamp body 2 handle 3 allows the positioning of the surgical light at any position on an operating table.
- the handle 3 is detachably attached to the underside 5 of the operating light. Light exits at the bottom 5 to illuminate the surgical site.
- FIG. 2 shows that individual light modules 6a to 6g are joined to one another almost without borders as a light source. Borderless in the sense of the invention means that the transitions between the individual light modules 6a to 6g have no significant influence on the optical properties, in particular on the light emission in the direction of the surgical site. The generated light is perceived as uniform despite the light source composed of a plurality of light modules 6a to 6g.
- Each light module 6a to 6g in turn comprises a plurality of individual LEDs, for example 10 to 50. This results in photometric advantages similar to large mirror lights, such as a theoretically optimal freedom from shadow by large-scale light emission.
- Each light module 6a to 6g can even illuminate a complete surgical site.
- Light generated by the light modules 6a to 6g is indicated by dashed lines by the light beams 7 , so that a luminous field 8 is formed.
- the light field 8 is the area illuminated on the operating table.
- the light modules 6a to 6g can be assembled by any combination with other light modules to different overall modules as a light source. This can change the luminous field size, the illuminance and the shape of the luminous field 8.
- the individual light modules for example the light module 6a shown in FIG. 3 , each consist of a housing 9 with mechanical and / or electrical or electronic connecting elements or connectors to adjacent light modules 6b to 6g.
- the shape of the light modules 6a to 6g is designed so that they can be arranged on a spherical surface with a typical radius 1000 mm without gaps. To achieve this, the light modules 6a to 6g are formed as hexagons. In compound form, a kind of honeycomb structure or facet structure results.
- the surface of the light modules 6a to 6g facing the surgical site does not necessarily have to be flat, but may be slightly concave in order to simulate the curvature of the spherical surface better.
- the optical axis of each light module 6a to 6g generally points to the focal point of the spherical surface.
- each light module 6a to 6g a plurality of, approximately 10 to 50 LEDs are distributed uniformly, of which only three are shown in FIG. 3 and designated by reference numerals 10a to 10c .
- the shadowing is optimized by a flat light emission.
- each of the almost punctiform radiating LEDs are assigned suitable optical elements, for example lenses 11a to 11c (indicated by dashed lines are, for example, the LED light beams 12a to 12c ).
- the shape of the lens elements 11a to 11c is designed so that they fill the light module 6a as far as possible to the edge.
- the lens elements 11a to 11c can also have a scattering structure for equalizing the light field.
- the underside 5 of the light modules can be covered by a transparent pane.
- the individual light modules 6a to 6g together form a light source a color temperature of about 4,500 K and a color rendering index Ra> 93, for a natural color representation, for example of the operating tissue. That's why not only LEDs come to life Insert which produce white light, but also LEDs 10a to 10c, which produce colored light In FIG. 3, those LEDs are for Generation of white light not designated by reference numerals.
- the white ones LEDs are designed analogous to the colored ones. By mixing colored Light components, such as Cyan and Blue, will be a slump in the spectrum as in an arrangement with pure white LEDs partially compensated. Furthermore, can targeted color mixtures are generated, which enhance the visual performance of the surgeon improve.
- the white LEDs can through exclusive stepless dimming of the intensity of the colored LEDs the Color temperature and color rendering of the through the overall module, consisting of all individual light modules 6a to 6g (total light source), be generated variably adjusted mixed light.
- the luminous flux intensity The colored LEDs 10a to 10c can be changed continuously. It would also be desirable to keep the overall illuminance constant through coordinated intensity control of all LEDs.
- the LEDs 10a to 10c are connected via power lines 13a to 13c and 14 to a control device 15 , which allows an electrical dimming of the luminous flux of the LEDs.
- the electrical dimming of the colored LEDs 10a to 10c causes a change in the color temperature and / or the color reproduction.
- Color rendering or a desired dimming state at constant Color temperature or color reproduction can be achieved.
- the brightness, the Color temperature and color reproduction can be detected metrologically.
- suitable drive parameters e.g., voltage, current
- the individual intensities can be regulated so that is a constant brightness, a constant color temperature or Optionally gives a constant color reproduction.
- These parameters can be stored as a characteristic in the control device. For different Color temperatures or color rendering indices become different Characteristics recorded and stored as a map.
- Control electronics instead of the stored characteristic curves / maps, the Control electronics with sensors for measuring the brightness, Color temperature and color reproduction are coupled.
- Color temperature can be controlled by using a control panel or a keyboard Control device to be set by the surgeon.
- the necessary Setting parameters can be stored in a memory of the control device become. Furthermore, it is conceivable that the surgeon further himself additionally save selected settings and these settings as well can change later.
- Reference numeral 16 denotes a greater brightness.
- Reference numeral 17 denotes a lower brightness. Color temperature and color reproduction remain unchanged.
- the color temperature can be adjusted at a constant brightness.
- the spectrum (wavelength ⁇ ) is changed to change the color temperature and at the same time the intensity is controlled so that the brightness (intensity I) remains unchanged.
- a different color temperature is set by changing wavelength components, so that the spectrum 19 according to FIG. 5 b results as an intermediate step.
- the brightness is kept constant analogously to the procedure according to FIG. 4 (see FIG. 5c), so that the spectrum 20 results in the desired final setting, ie a changed color temperature with constant brightness.
Abstract
Description
Die Erfindung betrifft eine Operationsleuchte, wie sie beispielsweise durch die DE 198 38 627 A1 bekannt geworden ist.The invention relates to a surgical light, as for example by DE 198 38 627 A1 has become known.
Die Dimmung einer Operationsleuchte oder einer medizinischen Leuchte erfolgt zur Vermeidung einer Blendung des Operateurs bei unterschiedlichen Gewebefarben. Helle Haut und weißes Fettgewebe führen zu einer hohen Reflexion. Rotes Gewebe absorbiert viel Licht und erscheint deshalb dunkler. Eine Dimmung wird auch zur Kompensation von Ermüdungseffekten des Auges des Operateurs eingesetzt. Eine Operation beginnt im gedimmten Zustand der Leuchte. Lichtreserven können die Ermüdung des Auges bei abnehmender Empfindlichkeit im Verlauf der Operation ausgleichen.The dimming of a surgical light or a medical light is done to avoid dazzling the surgeon at different Fabric colors. Light skin and white adipose tissue lead to a high Reflection. Red tissue absorbs a lot of light and therefore appears darker. Dimming is also used to compensate for fatigue effects of the Used by the surgeon. An operation begins in dimmed Condition of the lamp. Light reserves can contribute to the fatigue of the eye compensate for decreasing sensitivity in the course of surgery.
Der Operateur benötigt zur naturgetreuen Wahrnehmbarkeit und optimalen Beurteilung der beleuchteten Objekte von der Helligkeit unabhängige, möglichst konstante lichttechnische Eigenschaften der Leuchte.The surgeon needs to lifelike perception and optimal Judgment of the illuminated objects independent of the brightness, as constant as possible lighting properties of the lamp.
Als Leuchtmittel in einer medizinischen Leuchte kommen vorwiegend Halogen- bzw. Gasentladungslampen oder auch LEDs zum Einsatz. Alle diese Leuchtmittel weisen aber die Eigenschaft auf, dass sich bei der elektrischen / elektronischen Dimmung die Farbtemperatur des Lichtes stark verändert.As bulbs in a medical lamp come predominantly Halogen or gas discharge lamps or LEDs are used. All However, these bulbs have the property that in the electrical / electronic dimming the color temperature of the light strong changed.
Das menschliche Auge ist an Tageslicht gewöhnt. Der Sehvorgang ist an das Tageslicht angepasst. Bei Tageslicht erkennt das menschliche Auge am exaktesten Konturen, unterscheidet am differenziertesten Farben und erkennt Bewegungen am deutlichsten.The human eye is used to daylight. The sight is on the Adapted daylight. In daylight, the human eye detects most exact contours, differs in the most differentiated colors and detects movements most clearly.
Daher ist es wünschenswert, im Operationssaal Verhältnisse zu schaffen, welche dem Tageslicht vergleichbar sind. Der Operateur benötigt ein intensives und tageslichtähnliches Licht. Hinzu kommt, dass die Operationsstelle Licht nicht reflektiert, sondern dieses absorbiert wird.Therefore, it is desirable to create conditions in the operating room, which are comparable to the daylight. The surgeon needs a intense and daylight-like light. In addition, the Operation site light is not reflected, but this is absorbed.
Jeder Farbeindruck wird durch die spektrale Verteilung des Lichtes bestimmt. Einer spektralen Verteilung kann eine Farbtemperatur zugeordnet werden. Tageslicht beispielsweise hat eine Farbtemperatur von 5.600 Kelvin. In der Literatur ist bekannt, dass gemäß der Kruithoffschen Behaglichkeitskurve die Farbtemperatur mit der Beleuchtungsstärke abgestimmt sein muss, um eine angenehme Beleuchtungssituation zu schaffen. Für das Licht im Operationssaal wird weißes Licht mit einer Farbtemperatur von ca. 4.500 Kelvin bei hohen Beleuchtungsstärken (> 100.000 Lux) empfohlen.Every color impression is due to the spectral distribution of the light certainly. A spectral distribution can be assigned a color temperature become. For example, daylight has a color temperature of 5,600 Kelvin. In the literature it is known that according to the Kruithoffs Comfort curve the color temperature with the illuminance must be adjusted to a pleasant lighting situation create. The light in the operating room becomes white with a light Color temperature of about 4,500 Kelvin at high illuminance levels (> 100,000 lux) is recommended.
Die ideale Farbtemperatur wird vorwiegend durch den Einsatz von bekannten Farbkonversionsfiltern erzielt. Anstelle der Farbkonversionsfilter zur Korrektur der Farbtemperatur ist es auch bekannt, dem weißen Licht farbiges Licht zuzumischen.The ideal color temperature is predominantly due to the use of achieved known color conversion filters. Instead of the color conversion filters It is also known to correct the color temperature, the white light to mix colored light.
Der Anmelder hat sich die Aufgabe gestellt, die lichttechnischen Verhältnisse bei Operationen zu verbessern, bei einer Dimmung einer Operationsleuchte, die durch eine Farbtemperaturänderung und der Farbwiedergabeänderung auftretende Nachteile zu vermeiden und bei einer konstanten Helligkeit die Farbtemperatur und Farbwiedergabe einstellen zu können. The Applicant has set itself the task, the lighting conditions to improve in operations, with a dimming of a surgical light, by a color temperature change and the color rendering change to avoid occurring disadvantages and at a constant brightness the Adjust color temperature and color reproduction.
Diese Aufgabe wird durch eine Operationsleuchte gemäß Patentanspruch 1 gelöst. Durch Zumischen farbigen Lichtes, z.B. erzeugt durch farbige LEDs, kann ein Mischlicht mit einstellbaren lichttechnischen Daten erzeugt werden. Dabei können die elektrischen Parameter der Dimmung in der Steuerelektronik so hinterlegt werden (z.B. Kennfeld, Kennlinie), dass bei einer stufenlosen Veränderung der Helligkeit die vorgewählte Farbtemperatur und die Farbwiedergabe konstant gehalten werden,This object is achieved by an operating light according to claim 1 solved. By admixing colored light, e.g. generated by colored LEDs, a mixed light with adjustable photometric data can be generated. The electrical parameters of the dimming in the Control electronics are deposited so (for example, map, characteristic) that at a stepless change in brightness the preselected Color temperature and color reproduction are kept constant,
Eine Regeleinrichtung in Verbindung mit entsprechenden Sensoren kann es ermöglichen, dass eine gewünschte Farbtemperatur und/oder Farbwiedergabe eingestellt und überwacht, sowie nachgeregelt und bei einer definierten Helligkeit konstant gehalten werden kann.A control device in conjunction with corresponding sensors can do it allow a desired color temperature and / or Color reproduction adjusted and monitored, as well as readjusted and at a defined brightness can be kept constant.
Insbesondere erlaubt es die Regeleinrichtung dem Operateur, individuell auf seine Bedürfnisse abgestimmte Beleuchtungsverhältnisse im Operationsfeld zu schaffen. Je nach Farbtemperatur oder Farbwiedergabe sind Hervorhebungen von verschiedenen Gewebestrukturen oder Gewebemerkmalen innerhalb der Operationsstelle möglich.In particular, the control device allows the surgeon, individually on his needs adjusted lighting conditions in the surgical field to accomplish. Depending on the color temperature or color reproduction Highlighting of different tissue structures or Tissue features possible within the surgical site.
Die Dimmung kann durch mechanische und/oder optische Mittel erreicht werden. Eine Dimmung kann durch eine Änderung des der LED zugeführten elektrischen Stroms und/oder der elektrischen Spannung erzeugt werden. Alternativ können Blenden, Linsen oder optische Filter, welche in den Strahlengang hinein bewegt werden, eine Veränderung des Lichtstromes bewirken. Die Farbtemperatur bzw. die Farbwiedergabe bleibt bei einer mechanischen Dimmung konstant. The dimming can be achieved by mechanical and / or optical means become. A dimming can be caused by a change of the LED electric current and / or the electrical voltage can be generated. Alternatively, apertures, lenses or optical filters, which in the Beam path are moved into it, a change in the luminous flux cause. The color temperature or the color reproduction remains at one mechanical dimming constant.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird nachfolgend mit Bezug zu den Figuren der Zeichnung näher erläutert. Es zeigt:
- Fig. 1
- eine Operationsleuchte;
- Fig. 2
- mehrere Lichtmodule der Operationsleuchte gemäß Fig. 1;
- Fig. 3
- den näheren Aufbau eines Lichtmoduls gemäß Fig. 2;
- Fig.4
- ein Wellenlängenspektrum bei konstanter Farbtemperatur und Farbwiedergabe;
- Fig. 5a, 5b, 5c
- Wellenlängenspektren nach Einstellung der Farbtemperatur und Helligkeit.
- Fig. 1
- a surgical light;
- Fig. 2
- a plurality of light modules of the surgical lamp according to FIG. 1;
- Fig. 3
- the detailed structure of a light module of FIG. 2;
- Figure 4
- a wavelength spectrum with constant color temperature and color reproduction;
- Fig. 5a, 5b, 5c
- Wavelength spectra after setting the color temperature and brightness.
Aus der Seitenansicht einer Operationsleuchte 1 (Fig. 1) ist deren
prinzipieller an sich bekannter Aufbau ersichtlich. Die Operationsleuchte 1
umfasst einen Leuchtenkörper 2, welcher in seinem Innenraum in der Fig. 1
nicht sichtbare Leuchtmittel aufweist. Der Leuchtenkörper 2 ist über einen in
der Fig. 1 nicht vollständig gezeigten Schwenkarm schwenkbar an einer
stationären Halterung an einer Decke oder einer Wand eines Gebäudes oder
einer mobilen Einheit befestigt. Der Schwenkarm ist aus mehreren über
Gelenke miteinander verbundenen Elementen aufgebaut. Ein mit der
Operationsleuchte 1 fest verbundenes Element 4 des Schwenkarms ist in
der Fig. 1 lediglich angedeutet. Daher lässt sich die Operationsleuchte 1 in
X-, Y-, Z-Richtung dreidimensional bewegen und schwenken. Ein an dem
Leuchtenkörper 2 angebrachter Handgriff 3 ermöglicht die Positionierung
der Operationsleuchte an beliebiger Stelle über einem Operationstisch. Der
Handgriff 3 ist lösbar an der Unterseite 5 der Operationsleuchte angebracht.
An der Unterseite 5 tritt Licht aus, um die Operationsstelle auszuleuchten.From the side view of an operating light 1 (FIG. 1) , the basic structure known per se can be seen. The
Fig. 2 zeigt, dass als Lichtquelle einzelne Lichtmodule 6a bis 6g nahezu
randlos aneinander gefügt sind. Randlos bedeutet im Sinne der Erfindung,
dass die Übergänge zwischen den einzelnen Lichtmodulen 6a bis 6g keinen
wesentlichen Einfluss auf die optischen Eigenschaften, insbesondere auf den
Lichtaustritt in Richtung der Operationsstelle, besitzen. Das erzeugte Licht
wird trotz der aus mehreren Lichtmodulen 6a bis 6g zusammengesetzten
Lichtquelle als einheitlich wahrgenommen. Jedes Lichtmodul 6a bis 6g
umfasst wiederum eine Vielzahl einzelner LEDs, beispielsweise 10 bis 50.
Hieraus ergeben sich lichttechnische Vorteile analog zu Großspiegelleuchten,
wie eine theoretisch optimale Schattenfreiheit durch großflächigen
Lichtaustritt. Jedes Lichtmodul 6a bis 6g kann selbst eine komplette
Operationsstelle ausleuchten. Von den Lichtmodulen 6a bis 6g erzeugtes
Licht ist durch die Lichtstrahlen 7 gestrichelt angedeutet, so dass ein
Leuchtfeld 8 entsteht. Das Leuchtfeld 8 ist die auf dem Operationstisch
beleuchtete Fläche. Die Lichtmodule 6a bis 6g können durch beliebige
Kombination mit weiteren Lichtmodulen zu unterschiedlichsten
Gesamtmodulen als Lichtquelle zusammengesetzt werden. Dies kann die
Leuchtfeldgröße, die Beleuchtungsstärke und die Form des Leuchtfeldes 8
verändern. FIG. 2 shows that individual
Die einzelnen Lichtmodule, beispielsweise das in der Fig. 3 gezeigte
Lichtmodul 6a, bestehen alle jeweils aus einem Gehäuse 9 mit
mechanischen und/oder elektrischen oder elektronischen
Verbindungselementen oder Konnektoren zu benachbarten Lichtmodulen 6b
bis 6g. Die Form der Lichtmodule 6a bis 6g ist so gestaltet, dass sie auf
einer Kugelfläche mit typischem Radius 1000 mm ohne Zwischenräume
angeordnet werden können. Um dies zu erreichen, sind die Lichtmodule 6a
bis 6g als Sechsecke ausgebildet. In zusammengesetzter Form ergibt sich
eine Art Wabenstruktur oder Facettenstruktur. Die der Operationsstelle
zugewandte Fläche der Lichtmodule 6a bis 6g muss auch nicht zwingend
eben ausgebildet sein, sondern kann leicht konkav sein, um die Krümmung
der Kugelfläche besser nachzubilden. Die optische Achse jedes Lichtmoduls
6a bis 6g weist im Allgemeinen in den Brennpunkt der Kugelfläche.The individual light modules, for example the
Unterschiedliche Lichtfeldformen können durch die Aneinanderreihung von
Modulen mit verändertem Anstellwinkel erzeugt werden. Dazu können auch
Zwischenelemente zum Einsatz kommen. In jedem Lichtmodul 6a bis 6g
sind mehrere, ca. 10 bis 50 LEDs, gleichmäßig verteilt angeordnet, von
denen in der Fig. 3 lediglich drei gezeigt und mit Bezugszeichen 10a bis 10c
bezeichnet sind. Die Schattenbildung wird durch einen flächigen Lichtaustritt
optimiert. Hierzu sind jeder der nahezu punktförmig strahlenden LEDs
geeignete optische Elemente, z.B. Linsen 11a bis 11c, zugeordnet
(gestrichelt angedeutet sind beispielhaft die LED-Lichtstrahlen 12a bis 12c).
Die Form der Linsenelemente 11a bis 11c ist so gestaltet, dass sie das
Lichtmodul 6a möglichst bis zum Rand ausfüllen. Die Linsenelemente 11a
bis 11c können zudem über eine Streustruktur zur Vergleichmäßigung des
Lichtfeldes verfügen. Die Unterseite 5 der Lichtmodule kann durch eine
transparente Scheibe abgedeckt sein.Different light field shapes can be created by juxtaposing modulated angle modules. For this purpose, intermediate elements can also be used. In each
Die einzelnen Lichtmodule 6a bis 6g bilden zusammen eine Lichtquelle mit
einer Farbtemperatur von ca. 4.500 K sowie eines Farbwiedergabeindexes
Ra > 93, um eine natürliche Farbdarstellung, beispielsweise des zu
operierenden Gewebes, zu erreichen. Deshalb kommen nicht nur LEDs zum
Einsatz, welche weißes Licht erzeugen, sondern auch LEDs 10a bis 10c,
welche farbiges Licht erzeugen In der Fig. 3 sind diejenigen LEDs zur
Erzeugung weißen Lichtes nicht mit Bezugszeichen bezeichnet. Die weißen
LEDs sind analog zu den farbigen ausgebildet. Durch Zumischung farbiger
Lichtanteile, wie z.B. Cyan und Blau, wird ein Einbruch im Spektrum wie bei
einer Anordnung mit rein weißen LEDs teilweise kompensiert. Ferner können
gezielt Farbmischungen erzeugt werden, die die Sehleistung des Operateurs
verbessern. Bei konstanter Helligkeit der weißen LEDs können durch
ausschließliche stufenlose Dimmung der Intensität der farbigen LEDs die
Farbtemperatur und Farbwiedergabe des durch das Gesamtmodul,
bestehend aus allen einzelnen Lichtmodulen 6a bis 6g (Gesamtlichtquelle),
erzeugten Mischlichts variabel eingestellt werden. Die Lichtstromintensität
der farbigen LEDs 10a bis 10c kann stufenlos verändert werden.
Anzustreben wäre ferner das Konstanthalten der Gesamtbeleuchtungsstärke
durch abgestimmte Intensitätsregelung aller LEDs.The
Die LEDs 10a bis 10c sind über Stromleitungen 13a bis 13c und 14 mit
einer Regeleinrichtung 15 verbunden, welche eine elektrische Dimmung des
Lichtstroms der LEDs ermöglicht. Die elektrische Dimmung der farbigen
LEDs 10a bis 10c bewirkt eine Änderung der Farbtemperatur und/oder der
Farbwiedergabe.The
Es wird eine Grundeinstellung einer Farbtemperatur von 4.500 K vorgegeben, welche beim Einschalten der Operationsleuchte automatisch erzeugt wird.It becomes a basic setting of a color temperature of 4,500 K predetermined, which automatically when switching on the operating light is produced.
Durch stufenlose Dimmung der Intensität der weißen und der zusätzlichen farbigen Leuchtmittel kann die Helligkeit, Farbtemperatur und Farbwiedergabe des Mischlichtes variabel eingestellt werden. Dabei soll entweder eine konstante Helligkeit bei variabler Farbtemperatur bzw. By infinitely dimming the intensity of the white and the additional colored bulbs can change the brightness, color temperature and Color reproduction of the mixed light can be variably adjusted. It should either a constant brightness at variable color temperature or
Farbwiedergabe oder ein gewünschter Dimmzustand bei konstanter Farbtemperatur bzw. Farbwiedergabe erreicht werden.Color rendering or a desired dimming state at constant Color temperature or color reproduction can be achieved.
Bei der Dimmung verändern die weißen und die farbigen Leuchtmittel die Farbtemperatur des emittierten Lichtes. Damit ändert sich die Farbtemperatur sowie die Farbwiedergabe des Mischlichtes.When dimming the white and the colored bulbs change the Color temperature of the emitted light. This changes the Color temperature and the color reproduction of the mixed light.
Über den gesamten Dimmbereich der Leuchte kann die Helligkeit, die Farbtemperatur und Farbwiedergabe messtechnisch erfasst werden. Durch geeignete Ansteuerparameter (z.B. Spannung, Stromstärke) der weißen und der farbigen Leuchtmittel können die Einzelintensitäten so geregelt werden, dass sich eine konstante Helligkeit, eine konstante Farbtemperatur oder wahlweise eine konstante Farbwiedergabe ergibt. Diese Parameter können als Kennlinie in der Regeleinrichtung hinterlegt werden. Für unterschiedliche Farbtemperaturen bzw. Farbwiedergabeindizes werden verschiedene Kennlinien aufgenommen und als Kennfeld hinterlegt.Over the entire dimming range of the luminaire, the brightness, the Color temperature and color reproduction can be detected metrologically. By suitable drive parameters (e.g., voltage, current) of the white and the colored bulbs, the individual intensities can be regulated so that is a constant brightness, a constant color temperature or Optionally gives a constant color reproduction. These parameters can be stored as a characteristic in the control device. For different Color temperatures or color rendering indices become different Characteristics recorded and stored as a map.
Anstelle der hinterlegten Kennlinien / Kennfelder kann die Ansteuerelektronik mit Sensoren zur Messung der Helligkeit, Farbtemperatur und Farbwiedergabe gekoppelt werden.Instead of the stored characteristic curves / maps, the Control electronics with sensors for measuring the brightness, Color temperature and color reproduction are coupled.
Andere je nach Anwendung der Operationsleuchte gewünschte Farbtemperatur kann mithilfe eines Bedienfeldes oder einer Tastatur der Regeleinrichtung vom Operateur eingestellt werden. Die notwendigen Einstellparameter können in einem Speicher der Regeleinrichtung abgelegt werden. Weiterhin denkbar ist es, dass der Operateur weitere selbst gewählte Einstellungen zusätzlich abspeichern und diese Einstellungen auch nachträglich verändern kann. Others depending on the application of the surgical light desired Color temperature can be controlled by using a control panel or a keyboard Control device to be set by the surgeon. The necessary Setting parameters can be stored in a memory of the control device become. Furthermore, it is conceivable that the surgeon further himself additionally save selected settings and these settings as well can change later.
Fig. 4 zeigt, dass bei einer Veränderung der Intensität (I) des Lichtes das
Wellenlängenspektrum (Wellenlänge X) nicht geändert wird. Bezugsziffer 16
kennzeichnet eine größere Helligkeit. Bezugsziffer 17 kennzeichnet eine
geringere Helligkeit. Farbtemperatur und Farbwiedergabe bleiben
unverändert. 4 shows that when the intensity (I) of the light changes, the wavelength spectrum (wavelength X) is not changed.
Alternativ kann bei einer konstanten Helligkeit die Farbtemperatur
eingestellt werden. Hierbei wird zur Veränderung der Farbtemperatur das
Spektrum (Wellenlänge λ) verändert und gleichzeitig die Intensität so
geregelt, dass die Helligkeit (Intensität I) unverändert bleibt. Ausgehend
von dem Spektrum 18 gemäß Fig. 5a wird durch Veränderung von
Wellenlängenanteilen eine unterschiedliche Farbtemperatur eingestellt, so
dass sich als Zwischenschritt das Spektrum 19 gemäß Fig. 5b ergibt. Im
nächsten Schritt wird analog zur Vorgehensweise gemäß Fig. 4 die Helligkeit
konstant gehalten (siehe Fig. 5c), so dass sich das Spektrum 20 als
gewünschte Endeinstellung, d.h. eine veränderte Farbtemperatur bei
konstanter Helligkeit, ergibt. Alternatively, the color temperature can be adjusted at a constant brightness. Here, the spectrum (wavelength λ) is changed to change the color temperature and at the same time the intensity is controlled so that the brightness (intensity I) remains unchanged. Starting from the
- 11
- Operationsleuchtesurgical light
- 22
- Leuchtenkörperluminaire body
- 33
- Handgriffhandle
- 44
- Elementelement
- 55
- Unterseitebottom
- 6a6a
- Lichtmodullight module
- 6b6b
- Lichtmodullight module
- 6c6c
- Lichtmodullight module
- 6d6d
- Lichtmodullight module
- 6e6e
- Lichtmodullight module
- 6f6f
- Lichtmodullight module
- 6g6g
- Lichtmodullight module
- 77
- Lichtstrahlbeam of light
- 88th
- Leuchtfeldlight field
- 99
- Gehäusecasing
- 10a10a
- LEDLED
- 10b10b
- LEDLED
- 10c10c
- LEDLED
- 11a11a
- Linselens
- 11b11b
- Linselens
- 11c11c
- Linselens
- 12a12a
- Lichtstrahlbeam of light
- 12b12b
- Lichtstrahlbeam of light
- 12c12c
- Lichtstrahlbeam of light
- 13a13a
- Stromleitungpower line
- 13b13b
- Stromleitung power line
- 13c13c
- Stromleitungpower line
- 1414
- Stromleitungpower line
- 1515
- Regeleinrichtungcontrol device
- 1616
- WellenlängenspektrumWavelength spectrum
- 1717
- WellenlängenspektrumWavelength spectrum
- 1818
- WellenlängenspektrumWavelength spectrum
- 1919
- WellenlängenspektrumWavelength spectrum
- 2020
- WellenlängenspektrumWavelength spectrum
Claims (11)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04018642A EP1568938B1 (en) | 2004-02-28 | 2004-08-06 | Surgical lamp and method of illumination of an operating theatre |
CNB2005100524370A CN100473892C (en) | 2004-02-28 | 2005-02-28 | Surgical lamp |
US11/067,580 US7614763B2 (en) | 2004-02-28 | 2005-02-28 | Operating table lamp |
JP2005054108A JP5048927B2 (en) | 2004-02-28 | 2005-02-28 | Surgery lamp |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04004602A EP1568936A1 (en) | 2004-02-28 | 2004-02-28 | Surgical lamp and method of illumination of an operating theatre |
EP04004602 | 2004-02-28 | ||
EP04018642A EP1568938B1 (en) | 2004-02-28 | 2004-08-06 | Surgical lamp and method of illumination of an operating theatre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1568938A1 true EP1568938A1 (en) | 2005-08-31 |
EP1568938B1 EP1568938B1 (en) | 2006-09-27 |
Family
ID=34751690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04018642A Revoked EP1568938B1 (en) | 2004-02-28 | 2004-08-06 | Surgical lamp and method of illumination of an operating theatre |
Country Status (4)
Country | Link |
---|---|
US (1) | US7614763B2 (en) |
EP (1) | EP1568938B1 (en) |
JP (1) | JP5048927B2 (en) |
CN (1) | CN100473892C (en) |
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RU188259U1 (en) * | 2018-11-23 | 2019-04-04 | Федеральное государственное бюджетное учреждение науки Научно-технологический центр микроэлектроники и субмикронных гетероструктур Российской академии наук (НТЦ микроэлектроники РАН) | SURGICAL LED LAMP |
Also Published As
Publication number | Publication date |
---|---|
CN100473892C (en) | 2009-04-01 |
JP5048927B2 (en) | 2012-10-17 |
JP2005237973A (en) | 2005-09-08 |
CN1661273A (en) | 2005-08-31 |
EP1568938B1 (en) | 2006-09-27 |
US20050231945A1 (en) | 2005-10-20 |
US7614763B2 (en) | 2009-11-10 |
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