EP1568938B1 - Surgical lamp and method of illumination of an operating theatre - Google Patents

Surgical lamp and method of illumination of an operating theatre Download PDF

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Publication number
EP1568938B1
EP1568938B1 EP04018642A EP04018642A EP1568938B1 EP 1568938 B1 EP1568938 B1 EP 1568938B1 EP 04018642 A EP04018642 A EP 04018642A EP 04018642 A EP04018642 A EP 04018642A EP 1568938 B1 EP1568938 B1 EP 1568938B1
Authority
EP
European Patent Office
Prior art keywords
light
characterized
operating lamp
lamp according
dimming
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.)
Revoked
Application number
EP04018642A
Other languages
German (de)
French (fr)
Other versions
EP1568938A1 (en
Inventor
Rudolf Dr. Marka
Markus Vogl
Willibald Hiermer
Christian Prof. Bartenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRUMPF Medizin Systeme GmbH and Co KG
Original Assignee
Trumpf Kreuzer Medizin Systeme GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
Priority to EP04004602 priority Critical
Priority to EP04004602A priority patent/EP1568936A1/en
Application filed by Trumpf Kreuzer Medizin Systeme GmbH and Co KG filed Critical Trumpf Kreuzer Medizin Systeme GmbH and Co KG
Priority to EP04018642A priority patent/EP1568938B1/en
Publication of EP1568938A1 publication Critical patent/EP1568938A1/en
Application granted granted Critical
Publication of EP1568938B1 publication Critical patent/EP1568938B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34751690&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1568938(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application status is Revoked legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials
    • H05B33/0842Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control
    • H05B33/0857Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control of the color point of the light
    • H05B33/086Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control of the color point of the light involving set point control means
    • H05B33/0863Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control of the color point of the light involving set point control means by user interfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/40Hand grips
    • F21V21/403Hand grips for operation or dentist lamps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20Lighting for medical use
    • F21W2131/205Lighting for medical use for operating theatres
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • F21Y2113/13Combination of light sources of different colours comprising an assembly of point-like light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Description

  • The invention relates to a surgical light, as has become known for example from DE 198 38 627 A1.
  • Document US-A-4196460, which is considered to be the closest prior art, shows an operating light with white and colored bulbs and means for dimming the bulbs.
  • The dimming of a surgical light or a medical lamp is done to avoid dazzling the surgeon in different tissue colors. Light skin and white adipose tissue lead to high reflection. Red tissue absorbs a lot of light and therefore appears darker. Dimming is also used to compensate for fatigue effects of the surgeon's eye. An operation begins in the dimmed state of the lamp. Light reserves can compensate for the fatigue of the eye with decreasing sensitivity during the operation.
  • The surgeon needs to lifelike visibility and optimal assessment of the illuminated objects of the brightness independent, as constant as possible lighting properties of the lamp.
  • As a light source in a medical lamp mainly halogen or gas discharge lamps or LEDs are used. However, all these lamps have the property that the color temperature of the light changes greatly in the electrical / electronic dimming.
  • The human eye is used to daylight. The vision is adapted to the daylight. In daylight, the human eye detects most exact contours, distinguishes the most differentiated colors and recognizes movements most clearly.
  • Therefore, it is desirable to create conditions in the operating room that are comparable to daylight. The surgeon needs an intense and daylight-like light. In addition, the surgical site does not reflect light, but this is absorbed.
  • Each color impression is determined by the spectral distribution of the light. A spectral distribution can be assigned a color temperature. For example, daylight has a color temperature of 5,600 Kelvin. It is known in the literature that, according to Kruithoff's comfort curve, the color temperature must be matched with the illuminance in order to create a pleasant lighting situation. For the light in the operating room, white light with a color temperature of approx. 4,500 Kelvin at high illuminance levels (> 100,000 lux) is recommended.
  • The ideal color temperature is achieved primarily by the use of known color conversion filters. Instead of the color conversion filters for correcting the color temperature, it is also known to add colored light to the white light.
  • The Applicant has set itself the task to improve the lighting conditions in operations, to avoid the disadvantages occurring by a color temperature change and the color reproduction change in a dimming of a surgical light and to adjust the color temperature and color reproduction at a constant brightness.
  • This object is achieved by a surgical lamp according to claim 1. By admixing colored light, e.g. generated by colored LEDs, a mixed light can be generated with adjustable photometric data. In this case, the electrical parameters of the dimming in the control electronics can be stored in such a way (for example characteristic map, characteristic curve) that the preselected color temperature and the color reproduction are kept constant with a stepless change of the brightness.
  • A control device in conjunction with corresponding sensors can make it possible to set and monitor a desired color temperature and / or color reproduction, as well as being able to be adjusted and kept constant at a defined brightness.
  • In particular, the control device allows the surgeon to create lighting conditions in the surgical field that are individually tailored to his needs. Depending on the color temperature or color rendering, highlighting of various tissue structures or tissue features within the surgical site is possible.
  • The dimming can be achieved by mechanical and / or optical means. A dimming can be generated by a change in the electrical current supplied to the LED and / or the electrical voltage. Alternatively, diaphragms, lenses or optical filters, which are moved into the beam path, cause a change in the luminous flux. The color temperature or the color reproduction remains constant with a mechanical dimming.
  • A preferred embodiment of the invention is shown schematically in the drawing and will be explained below with reference to the figures of the drawing. It shows:
  • 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.
  • From the side view of an operating light 1 (FIG. 1) , the basic structure known per se can be seen. 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 positioning the surgical light anywhere 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 analogous to large mirror lights, such as a theoretically optimal freedom from shadow through large-area 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 to be on a spherical surface with a typical radius 1000 mm can be arranged 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.
  • Different light field shapes can be created by juxtaposing modulated angle modules. For this purpose, intermediate elements can also be used. In 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. For this purpose, 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 with a color temperature of about 4,500 K and a color rendering index Ra> 93 in order to achieve a natural color representation, for example of the tissue to be operated. Therefore, not only are LEDs used which generate white light, but also LEDs 10a to 10c, which generate colored light In FIG. 3, those LEDs for generating white light are not denoted by reference numerals. The white LEDs are designed analogous to the colored ones. By mixing colored light components, such as cyan and blue, a collapse in the spectrum is partially compensated, as in an arrangement with pure white LEDs. Furthermore, it is possible to produce color mixtures that improve the visual performance of the surgeon. With constant brightness of the white LEDs, the color temperature and color rendering of the mixed light generated by the total module, consisting of all individual light modules 6a to 6g (total light source), can be variably adjusted by exclusively stepless dimming of the intensity of the colored LEDs. The luminous flux intensity of the colored LEDs 10a to 10c can be changed continuously. It would also be desirable to keep the overall illuminance constant by means of 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.
  • A default color temperature of 4,500 K is specified, which is automatically generated when the operating light is switched on.
  • The brightness, color temperature and color reproduction of the mixed light can be variably adjusted by continuous dimming of the intensity of the white and the additional colored lamps. Either a constant brightness with variable color temperature or
  • Color reproduction or a desired dimming state at constant color temperature or color reproduction can be achieved.
  • When dimming the white and the colored bulbs change the color temperature of the emitted light. This changes the color temperature as well as the color rendering of the mixed light.
  • Over the entire dimming range of the luminaire, the brightness, color temperature and color rendering can be measured. By suitable driving parameters (for example voltage, current intensity) of the white and the colored illuminants, the individual intensities can be regulated in such a way that a constant brightness, a constant color temperature or optionally a constant color rendering results. These parameters can be stored as a characteristic in the control device. For different color temperatures or color rendering indices, different characteristics are recorded and stored as a map.
  • Instead of the stored characteristics / maps, the control electronics can be coupled with sensors for measuring the brightness, color temperature and color reproduction.
  • Other color temperature desired depending on the application of the surgical light can be adjusted by the operator by means of a control panel or keyboard of the control device. The necessary adjustment parameters can be stored in a memory of the control device. Furthermore, it is conceivable that the surgeon additionally store further self-selected settings and can also subsequently change these settings.
  • 4 shows that when the intensity (I) of the light changes, the wavelength spectrum (wavelength X) is not changed. Reference numeral 16 denotes a greater brightness. Reference numeral 17 denotes a lower brightness. Color temperature and color reproduction remain unchanged.
  • 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 spectrum 18 according to FIG. 5 a , 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. In the next 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.
  • LIST OF REFERENCE NUMBERS
  • 1
    surgical light
    2
    luminaire body
    3
    handle
    4
    element
    5
    bottom
    6a
    light module
    6b
    light module
    6c
    light module
    6d
    light module
    6e
    light module
    6f
    light module
    6g
    light module
    7
    beam of light
    8th
    light field
    9
    casing
    10a
    LED
    10b
    LED
    10c
    LED
    11a
    lens
    11b
    lens
    11c
    lens
    12a
    beam of light
    12b
    beam of light
    12c
    beam of light
    13a
    power line
    13b
    power line
    13c
    power line
    14
    power line
    15
    control device
    16
    Wavelength spectrum
    17
    Wavelength spectrum
    18
    Wavelength spectrum
    19
    Wavelength spectrum
    20
    Wavelength spectrum

Claims (11)

  1. Operating lamp (1) comprising at least one white and several coloured illumination means (10a, 10b, 10c) for illuminating an area to be operated on, characterized in that means for dimming the light flux, and a control means (15) are provided to control a constant colour temperature or a constant colour reproduction during dimming.
  2. Operating lamp according to claim 1, characterized in that, when the colour temperature is changed, the brightness of the operating lamp is kept constant.
  3. Operating lamp according to claim 1, characterized in that the white illumination means is an LED.
  4. Operating lamp according to claim 1, characterized in that the white illumination means is a halogen lamp.
  5. Operating lamp according to claim 1, characterized in that the white illumination means is a gas discharge lamp.
  6. Operating lamp according to claim 1, characterized in that the coloured illumination means are LEDs.
  7. Operating lamp according to claim 1, characterized in that the coloured illumination means are halogen lamps with colour filters.
  8. Operating lamp according to claim 1, characterized in that the coloured illumination means are gas discharge lamps with colour filters.
  9. Operating lamp according to any one of the preceding claims, characterized in that mechanical and/or optical dimming means are provided.
  10. Operating lamp according to any one of the preceding claims, characterized in that electric dimming means are provided.
  11. Operating lamp according to any one of the preceding claims, characterized in that lenses (11a through 11c) are used to provide uniform emission of light and focus the light onto the illumination field.
EP04018642A 2004-02-28 2004-08-06 Surgical lamp and method of illumination of an operating theatre Revoked EP1568938B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04004602 2004-02-28
EP04004602A EP1568936A1 (en) 2004-02-28 2004-02-28 Surgical lamp and method of illumination of an operating theatre
EP04018642A EP1568938B1 (en) 2004-02-28 2004-08-06 Surgical lamp and method of illumination of an operating theatre

Applications Claiming Priority (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
US11/067,580 US7614763B2 (en) 2004-02-28 2005-02-28 Operating table lamp
CNB2005100524370A CN100473892C (en) 2004-02-28 2005-02-28 Surgical lights
JP2005054108A JP5048927B2 (en) 2004-02-28 2005-02-28 Surgery lamp

Publications (2)

Publication Number Publication Date
EP1568938A1 EP1568938A1 (en) 2005-08-31
EP1568938B1 true EP1568938B1 (en) 2006-09-27

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Family Applications (1)

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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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AT416597T (en) 2002-05-09 2008-12-15 Philips Solid State Lighting Led dimmer control
FR2849160B1 (en) * 2002-12-24 2005-03-18 Alm Lighting device and use thereof
US7145125B2 (en) * 2003-06-23 2006-12-05 Advanced Optical Technologies, Llc Integrating chamber cone light using LED sources
DE502004003272D1 (en) * 2004-02-28 2007-05-03 Trumpf Kreuzer Med Sys Gmbh surgical light
EP1568936A1 (en) 2004-02-28 2005-08-31 TRUMPF Kreuzer Medizin Systeme GmbH & Co. KG Surgical lamp and method of illumination of an operating theatre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8454197B2 (en) 2007-10-05 2013-06-04 Trilux Medical Gmbh & Co. Kg LED operating room light
DE102008039791A1 (en) * 2008-08-26 2010-03-11 Siemens Aktiengesellschaft Operating space i.e. operating theater, illuminating method for anesthesiologist with color blindness, involves determining multiple reference variables for position, light output and/or light color of illuminants
DE102008039791B4 (en) * 2008-08-26 2017-05-11 Siemens Healthcare Gmbh Method and lighting device for illuminating a working space

Also Published As

Publication number Publication date
CN1661273A (en) 2005-08-31
JP5048927B2 (en) 2012-10-17
CN100473892C (en) 2009-04-01
US20050231945A1 (en) 2005-10-20
US7614763B2 (en) 2009-11-10
JP2005237973A (en) 2005-09-08
EP1568938A1 (en) 2005-08-31

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