EP2302287B1 - Lighting device with a system for regulating brightness according to the luminosity of the lighting field and corresponding use - Google Patents

Lighting device with a system for regulating brightness according to the luminosity of the lighting field and corresponding use Download PDF

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Publication number
EP2302287B1
EP2302287B1 EP10306015.8A EP10306015A EP2302287B1 EP 2302287 B1 EP2302287 B1 EP 2302287B1 EP 10306015 A EP10306015 A EP 10306015A EP 2302287 B1 EP2302287 B1 EP 2302287B1
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EP
European Patent Office
Prior art keywords
luminance
light source
illuminance
lighting
illumination
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Application number
EP10306015.8A
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German (de)
French (fr)
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EP2302287A2 (en
EP2302287A3 (en
Inventor
Gabriel Peyras
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Maquet SAS
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Maquet SAS
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Publication of EP2302287A3 publication Critical patent/EP2302287A3/en
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Classifications

    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0457—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0471—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting the proximity, the presence or the movement of an object or a person
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0471—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting the proximity, the presence or the movement of an object or a person
    • F21V23/0478—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting the proximity, the presence or the movement of an object or a person by means of an image recording device, e.g. a camera
    • 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
    • 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
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • the operative lights provide a large amount of light (40,000 lux to 160,000 lux) in the surgical field and allow the surgeon to work in good conditions.
  • This high amount of light is needed because of the low reflectivity of certain human tissues, such as muscles and certain tissues of the digestive tract, and the fact that the human eye has a better resolution for higher luminances.
  • Luminance therefore consists of two elements: the "luminance factor” depends solely on the reflectivity of the surface and the "luminance coefficient” depends solely on the surface shape.
  • Known operating lighting devices are equipped with an illumination adjustment system which requires the manual intervention of the user and which makes it possible to modify the luminous flux of the lighting device when the type of tissue observed changes.
  • the patent US 6964490 for example, relates to a lighting device of an operating field adapted to adjust the luminous flux as a function of the size of the illumination field to maintain the illumination at a substantially constant level.
  • the means detecting the change in the size of the illumination field may be, inter alia, an optical detector adapted to detect the variation of the luminance of the operating field. The variation of the detected luminance is then used to adjust the illumination to a predetermined level by changing the luminous flux.
  • the document EP 0544559 discloses an operating lighting device adapted to obtain lighting of maximum light intensity by comparison between a value of the current light intensity and a value of the previously memorized light intensity.
  • the document EP 1433998 discloses an operative lighting device adapted to detect an obstacle located between the light source and the illumination field.
  • These operating lighting devices are not adapted to modify the level of illumination as a function of the luminance, that is to say as a function of the luminance factor depending solely on the observed tissue reflectivity and / or the luminance depending solely on the surface form of the illuminated area, and therefore do not allow to maintain or obtain an ideal luminance for the comfort of the surgeon, especially during a change of tissue or shape of the field of intervention.
  • the present invention aims to overcome this drawback and to provide a lighting device adapted to create a better illumination of the lighting field and this preferably without human intervention.
  • the invention further relates to a use of a device as mentioned above to illuminate a field of intervention of a physician.
  • the lighting device 1 is intended to illuminate a lighting field 2 extending along a lighting plane PP including horizontal.
  • the lighting field 2 is the field of intervention of a doctor on a patient 3 in a medical operating room.
  • the lighting device 1 comprises a support 4 on which is disposed a light source 5 formed of a plurality of lighting elements 6 and adapted to illuminate the lighting field 2.
  • the lighting device 1 comprises in in addition to a device 7 for controlling the illumination of the light source 5.
  • This regulation device 7 for the illumination of the light source 5 comprises an input filter 8, a processor 9 and a memory 10.
  • the lighting device 1 further comprises a device for determining the actual luminance 11 adapted to determine the actual luminance of the lighting field 2.
  • This device for determining the actual luminance 11 is provided with a plurality of modules for determining the actual luminance 12 distributed on the support 4, in particular photodiodes and / or a CCD camera, or any other system adapted for this purpose.
  • each photodiode is provided with an optical system combining the illumination field 2 and the photodiode.
  • the CCD camera captures the illumination field 2 and has an output determining the actual luminance from the gray levels of pixels, the calculated exposure time by the automatic adjustment system of the exposure time or the aperture diameter calculated by the automatic aperture diameter adjustment system.
  • the lighting device 1 further comprises a device 13 for adjusting the illumination of the light source 5 and a man-machine interface 14.
  • the man-machine interface 14 comprises an input means 15 adapted to capture setpoints and a display means 16 adapted to display the values entered and the state of the lighting device 1.
  • the set values are in particular set values of the luminance of the lighting field 2 without being limited to those -this.
  • the lighting device 1 further comprises obstacle detection means 17 arranged on the support 4 and adapted to detect obstacles, such as for example arms, situated between one of the modules for determining the actual luminance 12 and the lighting field 2 and adapted to communicate with the input filter 8 of the control device 7 of the illumination of the light source.
  • obstacle detection means 17 arranged on the support 4 and adapted to detect obstacles, such as for example arms, situated between one of the modules for determining the actual luminance 12 and the lighting field 2 and adapted to communicate with the input filter 8 of the control device 7 of the illumination of the light source.
  • the Figure 5 represents the functional modules of the lighting device 1 according to the invention. Each of the functional blocks corresponds to one of the structural elements described above with reference to the Figure 4 .
  • the different modules of the lighting device 1, namely the light source 5, the regulation device 7 of the illumination of the light source 5, the device for determining the actual luminance 11, the adjustment device 13 from the illumination of the light source 5, the man-machine interface 14 and the means adapted to detect the obstacles 17, are coupled together by links, represented by arrows, 18 to 21 in the Figure 5 , the direction of the arrows 18 to 21 indicating the direction of transmission of information or the direction of transmission of a command between the respective elements.
  • the device operates as follows.
  • the user of the lighting device 1 enters through the man-machine interface 14 a set value of the luminance which corresponds to the desired luminance.
  • the setpoint therefore represents a determined luminance of the illumination field.
  • the set value of the luminance is entered at the beginning of the use, but it is also possible to enter or modify it during the use of the lighting device 1.
  • This set value of the luminance is transmitted via a link 18 to the control device 7 of the illumination of the light source 5 and stored in the memory 10.
  • the actual luminance determination device 11 determines the actual luminance of the illumination field 2 and creates an actual luminance signal of the illumination field 2 which is transmitted via the link 19 to the input filter 8 of the regulating device 7. the illumination of the light source 5 and which is then stored in the memory 10.
  • the processor 9 of the control device 7 of the illumination of the light source 5 determines the difference between the actual luminance value and the value of the luminance setpoint, as well as the absolute value of this difference and compares this absolute value of the difference with a value of the difference in luminance limit.
  • the illumination control device 7 of the light source 5 does not control the adjustment device 13 of the illumination of the source of the light 5 or the control for maintaining the illumination. Then, the control device 7 again reads an actual luminance value received by the actual luminance determination device 11 and repeats the described method.
  • the control device 7 of the illumination of the light source 5 controls the adjustment device 13 of the illumination of the light source 5 in a direction tending to reduce the difference between the actual luminance value and the set value of the luminance. Then, the adjustment device 13 of the illumination of the light source 5 acts on the light source 5 to increase or decrease the illumination of the light source 5 according to the control. More specifically, the adjustment device 13 of the illumination of the light source 5 varies the illumination of the light source 5. Preferably, this variation is performed by varying the light flux of the light source 5 without changing the size of the lighting field 2.
  • the illumination of the light source which is defined as the luminous flux of the light source received by a surface unit.
  • the luminance of the illumination field 2 is again determined by the determination of the actual luminance 11 and the procedure described above is repeated as many times until the absolute value of the difference between the actual luminance value and the set value of the luminance becomes less than or equal to the value limit of luminance difference, and preferably becomes equal to 0.
  • the detection means 7 detect an arm or another obstacle between the illumination field 2 and one of the actual luminance determination modules 12, a corresponding signal is transmitted to the input filter 8 of the control device 7 of the illumination of the light source 5 and the respective luminance value determined by the actual luminance determination module 12 is blocked by the input filter 8, and the illumination is thus regulated according to the set of values luminance determined by the other modules for determining the actual luminance on 12.
  • the device for determining the actual luminance 11 determines the actual luminance of the illumination field 2 periodically or continuously and the control device 7 of the illumination of the light source 5 periodically receives an actual luminance value of the illumination device. determination of the actual luminance 11.
  • the duration of the period is chosen such that the illumination of the light source 5 can be dynamically modified without the eye of the user of the lighting device 1 being exposed to a field of view. luminance illumination 2 substantially different from the luminance setpoint entered last and currently in effect.
  • the lighting device 1 is adapted to, when the actual luminance differs from the target luminance by a value greater than the limit deviation, bring the actual luminance to the limit value value, in a time not exceeding 2000 ms, and more preferably not 500 ms.
  • the lighting device 1 thus modifies the illumination as a function of the actual luminance of the illumination field 2, determined by the device for determining the actual luminance 11, and as a function of the set value of the luminance defined by the The user through the man-machine interface 14.
  • the change in illumination occurs autonomously.
  • autonomous means that the lighting device 1 is adapted to modify the illumination without requiring human intervention during this modification.
  • the Figure 1 shows a diagram of an example of luminance variation of a constant-illumination field of illumination during a surgical procedure with a lighting device of the state of the art.
  • the abscissa shows the time T
  • the ordinate on the left indicates the luminance of the lighting field.
  • the pace of the luminance in time is referenced L.
  • the ordinate on the right indicates the illumination and the pace of the illumination is referenced E. It is found that the luminance at time T 1 , corresponding to the beginning of the operation (assuming, for example, that the operation in question is not a cavity operation of gynecology, buccal type, etc.), is raised for a given illumination E 1 .
  • the Figure 1 also presents the evolution of the illumination emitted by the light source. It can be seen that no solicitation to modify illumination has has been operated, which results in a level of illumination of the constant light source.
  • the Figure 2 indicates the same situation as that described above with reference to the figure 1 , but at a time T 4 an increase in the illumination of the light source occurs by the intervention of the user. This leads in the lighting devices of the state of the art to a jump of the real luminance, provided that at time T4 the other parameters remain unchanged.
  • the Figure 3 shows a diagram of the type of diagrams of Figures 1 and 2 representing the appearance of the luminance and the illumination during an operation with a lighting device 1 according to the invention, which is adapted to maintain the actual luminance over time at a constant level or at the within a limit deviation, even in the presence of tissue reflectivity changes and / or surface and cavity situations.
  • the advantage of this lighting device 1 is a visual comfort for the user as well as the lack of need to modify the lighting setpoint by the same user, when the reflectivity and / or the surface shape change.
  • the illumination of the light source 5 is modified and adjusted automatically according to the actual luminance of the illumination field 2.
  • the illumination is set to a lower level to avoid a level of the actual luminance too high.
  • the control device 7 of the illumination of the light source 5 increases the illumination to avoid a loss of luminance due to the absorption of light by the tissue or the surface form of the illumination field 2.
  • the information transmitted between the different components described above is by values.
  • the information may be transmitted by signals other than values, for example electrical voltages or frequencies.
  • the lighting device 1 according to the invention is particularly intended for surgical lighting for surgery but can also be applied to the dental field.
  • the lighting device 1 comprises a device for determining the actual luminance 11 adapted to determine the actual luminance of the illumination field 2 and to create and transmit the actual luminance signal to the control device 7 of the illumination of the source 5 is a function of the reflectivity of the illumination field 2.
  • the illumination device 1 is also adapted to bring or maintain the brightness of the illumination field 2 within a set luminosity range or a target brightness when the reflectivity of the illumination field 2 is changed.
  • the lighting device therefore has the following characteristics. It is an operating lighting device comprising means for estimating the real luminance of the illuminated field or object, in particular as a function of the reflectivity and the surface shape of the object or field lighting, and means for controlling the illumination by the operating light at a luminance value determined according to the estimated luminance.
  • the luminance value determined is preferably constant over a given period, in particular over at least 1 min.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

La présente invention concerne un dispositif d'éclairage d'un champ d'éclairage, notamment d'un champ opératoire, comportant

  • une source de lumière, adaptée pour éclairer le champ d'éclairage; et
  • un dispositif de régulation de l'éclairement de la source de lumière.
The present invention relates to a lighting device of a lighting field, in particular of an operating field, comprising
  • a light source adapted to illuminate the lighting field; and
  • a device for regulating the illumination of the light source.

Les éclairages opératoires fournissent une grande quantité de lumière (40 000 lux à 160 000 lux) dans le champ opératoire et permettent ainsi au chirurgien de travailler dans de bonnes conditions.The operative lights provide a large amount of light (40,000 lux to 160,000 lux) in the surgical field and allow the surgeon to work in good conditions.

Cette forte quantité de lumière est nécessaire en raison de la faible réflectivité de certains tissus humains, tels que les muscles et certains tissus de l'appareil digestif, et du fait que l'oeil humain a une meilleure résolution pour des luminances élevées.This high amount of light is needed because of the low reflectivity of certain human tissues, such as muscles and certain tissues of the digestive tract, and the fact that the human eye has a better resolution for higher luminances.

Cependant, de trop fortes luminances peuvent aussi éblouir, fatiguer et dégrader la vision de l'observateur.However, too strong luminances can also dazzle, fatigue and degrade the view of the observer.

Au cours d'une même intervention, le chirurgien doit observer différents types de tissus avec des réflectivités différentes selon les tissus. La peau, les os, certaines parties du colon, sont très réfléchissants et conduisent, pour un éclairement donné, à des luminances élevées perçues par l'oeil du chirurgien. D'autres tissus sont très sombres et produisent des luminances faibles pour un éclairement donné. La forme de surface des tissus observés évolue également au cours de l'intervention, et peut conduire à des variations de l'éclairement reçu par les tissus, et par conséquent, à une variation de la luminance de ces tissus perçue par le chirurgien. Ainsi, lorsque le chirurgien incise à l'emplacement d'intervention, il se forme une cavité dans laquelle l'éclairement est moins élevé. Les tissus réémettent donc une luminance plus faible vers l'oeil du chirurgien que celle de l'emplacement avant l'intervention, indépendamment de la réflectivité du tissu. La luminance se compose donc de deux éléments: le « facteur de luminance » dépendant uniquement de la réflectivité de la surface et le « coefficient de luminance » dépendant uniquement de la forme de surface.During the same procedure, the surgeon must observe different types of tissue with different reflectivities depending on the tissue. The skin, the bones, certain parts of the colon, are very reflective and lead, for a given illumination, to high luminances perceived by the eye of the surgeon. Other tissues are very dark and produce low luminances for a given illumination. The surface shape of the tissues observed also changes during the procedure, and can lead to variations in the illumination received by the tissues, and consequently to a variation in the luminance of these tissues perceived by the surgeon. Thus, when the surgeon incises at the intervention site, a cavity is formed in which the illumination is lower. The tissues therefore re-emit a lower luminance to the surgeon's eye than that of the location before surgery, regardless of the reflectivity of the tissue. Luminance therefore consists of two elements: the "luminance factor" depends solely on the reflectivity of the surface and the "luminance coefficient" depends solely on the surface shape.

Les dispositifs d'éclairage opératoires connus sont équipés d'un système de réglage de l'éclairement qui nécessite l'intervention manuelle de l'utilisateur et qui permet de modifier le flux lumineux du dispositif d'éclairage lorsque le type de tissus observé change.Known operating lighting devices are equipped with an illumination adjustment system which requires the manual intervention of the user and which makes it possible to modify the luminous flux of the lighting device when the type of tissue observed changes.

Le brevet US 6964490 , par exemple, concerne un dispositif d'éclairage d'un champ opératoire adapté pour ajuster le flux lumineux en fonction de la taille du champ d'éclairage pour maintenir l'éclairement à un niveau sensiblement constant. Le moyen détectant le changement de la taille du champ d'éclairage peut être, entre autres, un détecteur optique adapté pour détecter la variation de la luminance du champ opératoire. La variation de la luminance détectée sert ensuite à régler l'éclairement à un niveau prédéterminé, en faisant changer le flux lumineux. Le document EP 0544559 divulgue un dispositif d'éclairage opératoire adapté pour obtenir un éclairage d'intensité lumineuse maximale par comparaison entre une valeur de l'intensité lumineuse actuelle et une valeur de l'intensité lumineuse précédemment mémorisée.The patent US 6964490 for example, relates to a lighting device of an operating field adapted to adjust the luminous flux as a function of the size of the illumination field to maintain the illumination at a substantially constant level. The means detecting the change in the size of the illumination field may be, inter alia, an optical detector adapted to detect the variation of the luminance of the operating field. The variation of the detected luminance is then used to adjust the illumination to a predetermined level by changing the luminous flux. The document EP 0544559 discloses an operating lighting device adapted to obtain lighting of maximum light intensity by comparison between a value of the current light intensity and a value of the previously memorized light intensity.

Le document EP 1433998 divulgue un dispositif d'éclairage opératoire adapté pour détecter un obstacle situé entre la source de lumiére et le champ d'éclairage.The document EP 1433998 discloses an operative lighting device adapted to detect an obstacle located between the light source and the illumination field.

Ces dispositifs d'éclairage opératoires ne sont pas adaptés pour modifier le niveau d'éclairement en fonction de la luminance, c'est-à-dire en fonction du facteur de luminance dépendant uniquement de la réflectivité des tissus observés et/ou du coefficient de luminance dépendant uniquement de la forme de surface de la zone éclairée, et ne permettent donc pas de maintenir ou d'obtenir une luminance idéale pour le confort du chirurgien, notamment lors d'un changement de tissu ou de forme du champ d'intervention.These operating lighting devices are not adapted to modify the level of illumination as a function of the luminance, that is to say as a function of the luminance factor depending solely on the observed tissue reflectivity and / or the luminance depending solely on the surface form of the illuminated area, and therefore do not allow to maintain or obtain an ideal luminance for the comfort of the surgeon, especially during a change of tissue or shape of the field of intervention.

La présente invention a pour but de pallier cet inconvénient et de proposer un dispositif d'éclairage adapté pour créer un meilleur éclairage du champ d'éclairage et ceci de préférence sans intervention humaine.The present invention aims to overcome this drawback and to provide a lighting device adapted to create a better illumination of the lighting field and this preferably without human intervention.

A cet effet, l'invention a pour objet un dispositif du type précité, caractérisé en ce que le dispositif de régulation de l'éclairement de la source de lumière est adapté pour

  1. (a) recevoir un signal de luminance réelle représentant la luminance réelle du champ d'éclairage ; et
  2. (b) commander l'éclairement de la source de lumière en fonction du signal de luminance réelle et d'un signal de consigne de la luminance,
et le dispositif d'éclairage comprend un dispositif de détermination de la luminance réelle adapté pour déterminer la luminance réelle du champ d'éclairage et pour créer et transmettre le signal de luminance réelle au dispositif de régulation de l'éclairement de la source de lumière.For this purpose, the subject of the invention is a device of the aforementioned type, characterized in that the device for regulating the illumination of the light source is adapted to
  1. (a) receiving a real luminance signal representing the actual luminance of the illumination field; and
  2. (b) controlling the illumination of the light source according to the actual luminance signal and a luminance setpoint signal,
and the illumination device comprises a real luminance determination device adapted to determine the actual luminance of the illumination field and to create and transmit the actual luminance signal to the illumination control device of the light source.

Selon d'autres modes de réalisation, l'invention comporte l'une ou plusieurs des caractéristiques suivantes :

  • Il comprend en outre une interface homme-machine qui est adaptée pour saisir une information de consigne de la luminance et générer le signal de consigne de la luminance du champ d'éclairage.
  • Il comprend en outre un dispositif d'ajustement de l'éclairement de la source de lumière, commandé par le dispositif de régulation de l'éclairement de la source de lumière.
According to other embodiments, the invention comprises one or more of the following features:
  • It further comprises a man-machine interface which is adapted to capture a luminance setpoint information and to generate the luminance setpoint signal of the luminance field.
  • It further comprises a device for adjusting the illumination of the light source, controlled by the device for regulating the illumination of the light source.

Le dispositif d'ajustement de l'éclairement de la source de lumière est adapté pour faire varier l'éclairement de la source de lumière par l'une des caractéristiques suivantes:

  • variation du flux lumineux de la source de lumière ; et
  • variation de l'ouverture d'un diaphragme disposé entre la source de lumière et le champ d'éclairage ;
  • mouvement d'une pièce optique, tel que la rotation d'un polariseur par rapport à un deuxième polariseur de façon que l'angle entre leurs axes, et ainsi le flux lumineux sortant, est contrôlé, les deux polariseurs étant placés entre la source de lumière et le champ d'éclairage.
The device for adjusting the illumination of the light source is adapted to vary the illumination of the light source by one of the following characteristics:
  • variation of the luminous flux of the light source; and
  • variation of the aperture of a diaphragm disposed between the light source and the illumination field;
  • movement of an optical part, such as the rotation of a polarizer relative to a second polarizer so that the angle between their axes, and thus the outgoing luminous flux, is controlled, the two polarizers being placed between the source of light and the field of illumination.

Le dispositif de régulation de l'éclairement de la source de lumière est adapté pour:

  • comparer une différence entre le signal de luminance réelle et le signal de consigne de la luminance à une valeur d'écart de luminance limite
  • commander le dispositif d'ajustement de l'éclairement de la source de lumière lorsque la différence est supérieure à la valeur d'écart de luminance limite pour faire varier l'éclairement de la source de lumière de sorte que la différence devienne égale ou inférieure à la valeur d'écart de luminance limite, et de préférence devienne égale à 0.
  • lorsque la valeur absolue de la différence est inférieure à la valeur d'écart de luminance limite, le dispositif de régulation de l'éclairement de la source de lumière ne commande pas le dispositif d'ajustement de l'éclairement de la source de lumière ou le commande en vu d'un maintien de l'éclairement ;
  • Le dispositif de régulation de l'éclairement de la source de lumière est adapté pour recevoir périodiquement le signal de luminance réelle par le dispositif de détermination de la luminance réelle et le signal de consigne de la luminance.
  • Le dispositif de détermination de la luminance réelle comprend :
  • au moins une photodiode disposée sur un support, ou
  • au moins une caméra CCD disposée sur un support.
The device for regulating the illumination of the light source is adapted to:
  • comparing a difference between the actual luminance signal and the luminance setpoint signal to a limit luminance deviation value
  • controlling the illumination adjusting device of the light source when the difference is greater than the limit luminance deviation value for varying the illumination of the light source so that the difference becomes equal to or less than the limit luminance deviation value, and preferably becomes equal to 0.
  • when the absolute value of the difference is less than the limit luminance difference value, the illumination control device of the light source does not control the illumination adjustment device of the light source or the control in view of maintaining the illumination;
  • The device for regulating the illumination of the light source is adapted to periodically receive the actual luminance signal by the device for determining the actual luminance and the luminance setpoint signal.
  • The device for determining the actual luminance comprises:
  • at least one photodiode disposed on a support, or
  • at least one CCD camera disposed on a support.

Le dispositif de détermination de la luminance réelle comprend deux modules de détermination de la luminance réelle et des moyens adaptés pour détecter un obstacle situé entre l'un des modules de détermination de la luminance réelle et le champ d'éclairage ; et le signal de luminance réelle transmis au dispositif de régulation de l'éclairement de la source de lumière est celui associé à l'autre module de détermination de la luminance réelle.

  • Ledit dispositif de régulation de l'éclairement de la source de lumière comprend un processeur et une mémoire.
The device for determining the real luminance comprises two modules for determining the real luminance and means adapted to detect an obstacle situated between one of the modules for determining the real luminance and the illumination field; and the actual luminance signal transmitted to the device for regulating the illumination of the light source is that associated with the other module for determining the actual luminance.
  • Said device for regulating the illumination of the light source comprises a processor and a memory.

L'invention a en outre pour objet une utilisation d'un dispositif tel que précité pour éclairer un champ d'intervention d'un médecin.The invention further relates to a use of a device as mentioned above to illuminate a field of intervention of a physician.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :

  • la Figure 1 est un diagramme représentant l'allure de la luminance d'un champ d'éclairage au cours d'une opération à éclairement constant selon l'état de la technique ;
  • la Figure 2 est un diagramme représentant l'allure de la luminance d'un champ d'éclairage au cours d'une opération à éclairement non constant selon l'état de la technique ;
  • la Figure 3 est un diagramme représentant la modification de l'éclairement pour maintenir la luminance du champ d'éclairage constante au cours d'une opération selon l'invention ;
  • la Figure 4 est une vue schématique de côté d'une installation d'éclairage comportant un dispositif d'éclairage selon l'invention ; et
  • la Figure 5 est une représentation schématique des modules fonctionnels du dispositif d'éclairage selon l'invention.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which:
  • the Figure 1 is a diagram showing the shape of the luminance of a lighting field during a constant illumination operation according to the state of the art;
  • the Figure 2 is a diagram showing the appearance of the luminance of a lighting field during a non-constant illumination operation according to the state of the art;
  • the Figure 3 is a diagram showing the change in illumination to maintain the luminance of the constant illumination field during an operation according to the invention;
  • the Figure 4 is a schematic side view of a lighting installation comprising a lighting device according to the invention; and
  • the Figure 5 is a schematic representation of the functional modules of the lighting device according to the invention.

Sur la Figure 4 est représenté un dispositif d'éclairage selon l'invention, désigné par la référence 1. Le dispositif d'éclairage 1 est destiné à éclairer un champ d'éclairage 2 s'étendant suivant un plan d'éclairage P-P notamment horizontal. En l'occurrence, le champ d'éclairage 2 est le champ d'intervention d'un médecin sur un patient 3 dans une salle d'opération médicale.On the Figure 4 is represented a lighting device according to the invention, designated by the reference 1. The lighting device 1 is intended to illuminate a lighting field 2 extending along a lighting plane PP including horizontal. In this case, the lighting field 2 is the field of intervention of a doctor on a patient 3 in a medical operating room.

Le dispositif d'éclairage 1 comprend un support 4 sur lequel est disposée une source de lumière 5 formée d'une pluralité d'éléments d'éclairage 6 et adaptée pour éclairer le champ d'éclairage 2. Le dispositif d'éclairage 1 comprend en outre un dispositif de régulation 7 de l'éclairement de la source de lumière 5. Ce dispositif de régulation 7 de l'éclairement de la source de lumière 5 comprend un filtre d'entrée 8, un processeur 9 et une mémoire 10.The lighting device 1 comprises a support 4 on which is disposed a light source 5 formed of a plurality of lighting elements 6 and adapted to illuminate the lighting field 2. The lighting device 1 comprises in in addition to a device 7 for controlling the illumination of the light source 5. This regulation device 7 for the illumination of the light source 5 comprises an input filter 8, a processor 9 and a memory 10.

Le dispositif d'éclairage 1 comprend en outre un dispositif de détermination de la luminance réelle 11 adapté pour déterminer la luminance réelle du champ d'éclairage 2.The lighting device 1 further comprises a device for determining the actual luminance 11 adapted to determine the actual luminance of the lighting field 2.

Ce dispositif de détermination de la luminance réelle 11 est muni d'une pluralité de modules de détermination de la luminance réelle 12 répartis sur le support 4, notamment des photodiodes et/ou une caméra CCD, ou tout autre système adapté à cet effet. Au cas où le dispositif de détermination de la luminance réelle 11 comprend une pluralité de photodiodes, chaque photodiode est munie d'un système optique conjuguant le champ d'éclairage 2 et la photodiode. Lorsque le dispositif de détermination de la luminance réelle 11 comprend une caméra CCD, la caméra CCD capture le champ d'éclairage 2 et dispose d'une sortie déterminant la luminance réelle à partir des niveaux de gris de pixels, du temps d'exposition calculé par le système d'ajustement automatique du temps d'exposition ou du diamètre d'ouverture calculé par le système d'ajustement automatique du diamètre d'ouverture.This device for determining the actual luminance 11 is provided with a plurality of modules for determining the actual luminance 12 distributed on the support 4, in particular photodiodes and / or a CCD camera, or any other system adapted for this purpose. In the case where the device for determining the actual luminance 11 comprises a plurality of photodiodes, each photodiode is provided with an optical system combining the illumination field 2 and the photodiode. When the device for determining the real luminance 11 comprises a CCD camera, the CCD camera captures the illumination field 2 and has an output determining the actual luminance from the gray levels of pixels, the calculated exposure time by the automatic adjustment system of the exposure time or the aperture diameter calculated by the automatic aperture diameter adjustment system.

Le dispositif d'éclairage 1 comprend en outre un dispositif d'ajustement 13 de l'éclairement de la source de lumière 5 et une interface homme-machine 14. L'interface homme-machine 14 comprend un moyen de saisie 15 adapté pour saisir des valeurs de consigne et un moyen de visualisation 16 adapté pour visualiser les valeurs saisies et l'état du dispositif d'éclairage 1. Les valeurs de consigne sont notamment des valeurs de consigne de la luminance du champ d'éclairage 2 sans être limitées à celles-ci.The lighting device 1 further comprises a device 13 for adjusting the illumination of the light source 5 and a man-machine interface 14. The man-machine interface 14 comprises an input means 15 adapted to capture setpoints and a display means 16 adapted to display the values entered and the state of the lighting device 1. The set values are in particular set values of the luminance of the lighting field 2 without being limited to those -this.

Le dispositif d'éclairage 1 comprend en outre des moyens de détection d'obstacles 17 disposés sur le support 4 et adaptés pour détecter des obstacles, comme par exemple des bras, situés entre l'un des modules de détermination de la luminance réelle 12 et le champ d'éclairage 2 et adaptés pour communiquer avec le filtre d'entrée 8 du dispositif de régulation 7 de l'éclairement de la source de lumière.The lighting device 1 further comprises obstacle detection means 17 arranged on the support 4 and adapted to detect obstacles, such as for example arms, situated between one of the modules for determining the actual luminance 12 and the lighting field 2 and adapted to communicate with the input filter 8 of the control device 7 of the illumination of the light source.

La Figure 5 représente les modules fonctionnels du dispositif d'éclairage 1 selon l'invention. Chacun des blocs fonctionnels correspond à l'un des éléments structurels décrits ci-dessus en référence à la Figure 4. Les différents modules du dispositif d'éclairage 1, à savoir la source de lumière 5, le dispositif de régulation 7 de l'éclairement de la source de lumière 5, le dispositif de détermination de la luminance réelle 11 , le dispositif d'ajustement 13 de l'éclairement de la source de lumière 5, l'interface homme-machine 14 et les moyens adaptés pour détecter les obstacles 17, sont accouplés entre eux par des liens, représentés par des flèches, 18 à 21 dans la Figure 5, le sens des flèches 18 à 21 indiquant le sens de transmission d'information ou le sens de transmission d'une commande entre les éléments respectifs.The Figure 5 represents the functional modules of the lighting device 1 according to the invention. Each of the functional blocks corresponds to one of the structural elements described above with reference to the Figure 4 . The different modules of the lighting device 1, namely the light source 5, the regulation device 7 of the illumination of the light source 5, the device for determining the actual luminance 11, the adjustment device 13 from the illumination of the light source 5, the man-machine interface 14 and the means adapted to detect the obstacles 17, are coupled together by links, represented by arrows, 18 to 21 in the Figure 5 , the direction of the arrows 18 to 21 indicating the direction of transmission of information or the direction of transmission of a command between the respective elements.

Le dispositif fonctionne de la manière suivante.The device operates as follows.

L'utilisateur du dispositif d'éclairage 1 saisit par l'interface homme-machine 14 une valeur de consigne de la luminance qui correspond à la luminance souhaitée. La valeur de consigne représente donc une luminance déterminée du champ d'éclairage. De préférence, la valeur de consigne de la luminance est saisie au début de l'utilisation, mais il est également possible de la saisir ou modifier au cours de l'utilisation du dispositif d'éclairage 1. Cette valeur de consigne de la luminance est transmise via un lien 18 au dispositif de régulation 7 de l'éclairement de la source de lumière 5 et stockée dans la mémoire 10. Le dispositif de détermination 11 de la luminance réelle détermine la luminance réelle du champ d'éclairage 2 et crée un signal de luminance réelle du champ d'éclairage 2 qui est transmis via le lien 19 au filtre d'entrée 8 du dispositif de régulation 7 de l'éclairement de la source de lumière 5 et qui est ensuite stockée dans la mémoire 10. Le processeur 9 du dispositif de régulation 7 de l'éclairement de la source de lumière 5 détermine la différence entre la valeur de luminance réelle et la valeur de consigne de la luminance, ainsi que la valeur absolue de cette différence et compare cette valeur absolue de la différence à une valeur d'écart de luminance limite.The user of the lighting device 1 enters through the man-machine interface 14 a set value of the luminance which corresponds to the desired luminance. The setpoint therefore represents a determined luminance of the illumination field. Preferably, the set value of the luminance is entered at the beginning of the use, but it is also possible to enter or modify it during the use of the lighting device 1. This set value of the luminance is transmitted via a link 18 to the control device 7 of the illumination of the light source 5 and stored in the memory 10. The actual luminance determination device 11 determines the actual luminance of the illumination field 2 and creates an actual luminance signal of the illumination field 2 which is transmitted via the link 19 to the input filter 8 of the regulating device 7. the illumination of the light source 5 and which is then stored in the memory 10. The processor 9 of the control device 7 of the illumination of the light source 5 determines the difference between the actual luminance value and the value of the luminance setpoint, as well as the absolute value of this difference and compares this absolute value of the difference with a value of the difference in luminance limit.

Si la valeur absolue de la différence entre la valeur de luminance réelle et la valeur de consigne de la luminance est inférieure ou égale à la valeur d'écart de luminance limite, le dispositif de régulation de l'éclairement 7 de la source de lumière 5 ne commande pas le dispositif d'ajustement 13 de l'éclairement de la source de la lumière 5 ou le commande en vue d'un maintien de l'éclairement. Ensuite, le dispositif de régulation 7 lit à nouveau une valeur de luminance réelle reçue par le dispositif de détermination de la luminance réelle 11 et répète le procédé décrit.If the absolute value of the difference between the actual luminance value and the set value of the luminance is less than or equal to the limit luminance difference value, the illumination control device 7 of the light source 5 does not control the adjustment device 13 of the illumination of the source of the light 5 or the control for maintaining the illumination. Then, the control device 7 again reads an actual luminance value received by the actual luminance determination device 11 and repeats the described method.

Si la valeur absolue de la différence entre la valeur de luminance réelle et la valeur de consigne de la luminance est supérieure à la valeur d'écart de luminance limite, le dispositif de régulation 7 de l'éclairement de la source de lumière 5 commande le dispositif d'ajustement 13 de l'éclairement de la source de lumière 5 dans un sens tendant à diminuer l'écart entre la valeur de luminance réelle et la valeur de consigne de la luminance. Ensuite, le dispositif d'ajustement 13 de l'éclairement de la source de lumière 5 agit sur la source de lumière 5 pour augmenter ou baisser l'éclairement de la source de lumière 5 en fonction de la commande. Plus précisément, le dispositif d'ajustement 13 de l'éclairement de la source de lumière 5 fait varier l'éclairement de la source de lumière 5. De préférence, cette variation est effectuée en faisant varier le flux lumineux de la source de lumière 5 sans modification de la taille du champ d'éclairage 2.If the absolute value of the difference between the actual luminance value and the set value of the luminance is greater than the value of the difference in luminance limit, the control device 7 of the illumination of the light source 5 controls the adjustment device 13 of the illumination of the light source 5 in a direction tending to reduce the difference between the actual luminance value and the set value of the luminance. Then, the adjustment device 13 of the illumination of the light source 5 acts on the light source 5 to increase or decrease the illumination of the light source 5 according to the control. More specifically, the adjustment device 13 of the illumination of the light source 5 varies the illumination of the light source 5. Preferably, this variation is performed by varying the light flux of the light source 5 without changing the size of the lighting field 2.

L'éclairement de la source de lumière qui est défini comme le flux lumineux de la source de lumière 5 reçu par une unité de surface.The illumination of the light source which is defined as the luminous flux of the light source received by a surface unit.

Après ajustement de l'éclairement de la source de lumière 5, la luminance du champ d'éclairage 2 est à nouveau déterminée par le dispositif de détermination de la luminance réelle 11 et la procédure décrite ci-dessus est répétée autant de fois jusqu'à ce que la valeur absolue de la différence entre la valeur de luminance réelle et la valeur de consigne de la luminance devienne inférieure ou égale à la valeur d'écart de luminance limite, et de préférence devienne égale à 0.After adjusting the illumination of the light source 5, the luminance of the illumination field 2 is again determined by the determination of the actual luminance 11 and the procedure described above is repeated as many times until the absolute value of the difference between the actual luminance value and the set value of the luminance becomes less than or equal to the value limit of luminance difference, and preferably becomes equal to 0.

Lorsque les moyens de détection 7 détectent un bras ou un autre obstacle entre le champ d'éclairage 2 et un des modules de détermination de la luminance réelle 12, un signal correspondant est transmis au filtre d'entrée 8 du dispositif de régulation 7 de l'éclairement de la source de lumière 5 et la valeur respective de luminance déterminée par le module de détermination de la luminance réelle 12 est bloquée par le filtre d'entrée 8, et l'éclairement est donc régulé en fonction de l'ensemble des valeurs de luminance déterminées par les autres modules de détermination de la luminance réel le 12.When the detection means 7 detect an arm or another obstacle between the illumination field 2 and one of the actual luminance determination modules 12, a corresponding signal is transmitted to the input filter 8 of the control device 7 of the illumination of the light source 5 and the respective luminance value determined by the actual luminance determination module 12 is blocked by the input filter 8, and the illumination is thus regulated according to the set of values luminance determined by the other modules for determining the actual luminance on 12.

Le dispositif de détermination de la luminance réelle 11 détermine la luminance réelle du champ d'éclairage 2 périodiquement ou de façon continue et le dispositif de régulation 7 de l'éclairement de la source de lumière 5 reçoit périodiquement une valeur de luminance réelle du dispositif de détermination de la luminance réelle 11. La durée de période est choisie tel que l'éclairement de la source de lumière 5 puisse être modifié dynamiquement sans que l'oeil de l'utilisateur du dispositif d'éclairage 1 soit exposé à un champ d'éclairage 2 de luminance sensiblement différente de la valeur de consigne de la luminance saisie en dernier lieu et actuellement en vigueur.The device for determining the actual luminance 11 determines the actual luminance of the illumination field 2 periodically or continuously and the control device 7 of the illumination of the light source 5 periodically receives an actual luminance value of the illumination device. determination of the actual luminance 11. The duration of the period is chosen such that the illumination of the light source 5 can be dynamically modified without the eye of the user of the lighting device 1 being exposed to a field of view. luminance illumination 2 substantially different from the luminance setpoint entered last and currently in effect.

Le dispositif d'éclairage 1 est adapté pour, lorsque la luminance réelle diffère de la luminance de consigne d'une valeur supérieure à l'écart limite, amener la luminance réelle à la valeur écart limite, dans un temps qui n'excède pas 2000 ms, et plus avantageusement pas 500 ms.The lighting device 1 is adapted to, when the actual luminance differs from the target luminance by a value greater than the limit deviation, bring the actual luminance to the limit value value, in a time not exceeding 2000 ms, and more preferably not 500 ms.

Pour faire varier l'éclairement de la source de lumière 5 différents paramètres du dispositif d'éclairage 1 peuvent être variés par le dispositif d'ajustement 13 de l'éclairement de la source de lumière 5. Les modifications comprennent:

  • la variation du flux lumineux de la source de lumière 5, par exemple, par l'intensité d'alimentation de la source de lumière 5,
  • la variation de l'ouverture d'un diaphragme disposé entre la source de lumière 5 et le champ d'éclairage 2,
  • le mouvement d'une pièce optique, tel que la rotation d'un polariseur par rapport à un deuxième polariseur de façon que l'angle entre leurs axes, et ainsi le flux lumineux sortant, est contrôlé, les deux polariseurs étant placés entre la source de lumière 5 et le champ d'éclairage 2.
To vary the illumination of the light source 5 different parameters of the lighting device 1 can be varied by the adjustment device 13 of the illumination of the light source 5. The modifications include:
  • the variation of the luminous flux of the light source 5, for example, by the supply intensity of the light source 5,
  • the variation of the aperture of a diaphragm disposed between the light source 5 and the illumination field 2,
  • the movement of an optical part, such as the rotation of a polarizer relative to a second polarizer so that the angle between their axes, and thus the outgoing luminous flux, is controlled, the two polarizers being placed between the source of light 5 and the field of illumination 2.

Le dispositif d'éclairage 1 modifie donc l'éclairement en fonction de la luminance réelle du champ d'éclairage 2, déterminée par le dispositif de détermination de la luminance réelle 11, et en fonction de la valeur de consigne de la luminance définie par l'utilisateur par l'interface homme-machine 14. La modification de l'éclairement se produit de façon autonome. Le terme «autonome» signifie que le dispositif d'éclairage 1 est adapté pour modifier l'éclairement sans nécessiter de l'intervention humaine au cours de cette modification.The lighting device 1 thus modifies the illumination as a function of the actual luminance of the illumination field 2, determined by the device for determining the actual luminance 11, and as a function of the set value of the luminance defined by the The user through the man-machine interface 14. The change in illumination occurs autonomously. The term "autonomous" means that the lighting device 1 is adapted to modify the illumination without requiring human intervention during this modification.

La Figure 1 montre un diagramme d'un exemple de variation de luminance d'un champ d'éclairage à éclairement constant au cours d'une intervention chirurgicale avec un dispositif d'éclairage de l'état de la technique. L'abscisse montre le temps T, l'ordonné à gauche indique la luminance du champ d'éclairage. L'allure de la luminance dans le temps est référencée L. L'ordonné à droite indique l'éclairement et l'allure de l'éclairement est référencée E. On constate que la luminance à l'instant T1, correspondant au début de l'opération (en supposant par exemple que l'opération en question n'est pas une opération en cavité de type gynécologie, buccale, etc....), est élevée pour un éclairement E1 donné. Ceci est dû au fait que les tissus superficiels sont relativement réfléchissants, ce qui implique qu'une grande partie de la lumière émise par le dispositif d'éclairage est renvoyée. Au cours de l'opération, le chirurgien est amené à intervenir progressivement en profondeur dans les tissus et il se forme donc une cavité. Lors des temps T2 et T3 il se produit donc une diminution de la luminance due à une absorption importante de la lumière par ces tissus et/ou due à une situation en cavité. Une fois son intervention effectuée, le chirurgien suture la plaie, ce qui se traduit par une nouvelle augmentation de la luminance à éclairement constant E1. La Figure 1 présente également l'évolution de l'éclairement émis par la source de lumière. On constate qu'aucune sollicitation de modification de l'éclairement n'a été opérée, ce qui se traduit par un niveau d'éclairement de la source de lumière constant.The Figure 1 shows a diagram of an example of luminance variation of a constant-illumination field of illumination during a surgical procedure with a lighting device of the state of the art. The abscissa shows the time T, the ordinate on the left indicates the luminance of the lighting field. The pace of the luminance in time is referenced L. The ordinate on the right indicates the illumination and the pace of the illumination is referenced E. It is found that the luminance at time T 1 , corresponding to the beginning of the operation (assuming, for example, that the operation in question is not a cavity operation of gynecology, buccal type, etc.), is raised for a given illumination E 1 . This is because the surface fabrics are relatively reflective, which implies that much of the light emitted by the lighting device is returned. During the operation, the surgeon is made to intervene progressively deep in the tissues and thus forms a cavity. During times T 2 and T 3 there is therefore a decrease in luminance due to a significant absorption of light by these tissues and / or due to a cavity situation. Once the procedure has been performed, the surgeon sutures the wound, which results in a further increase of the luminance at constant illumination E1. The Figure 1 also presents the evolution of the illumination emitted by the light source. It can be seen that no solicitation to modify illumination has has been operated, which results in a level of illumination of the constant light source.

La Figure 2 indique la même situation que celle décrite ci-dessus en référence à la figure 1, mais à un instant T4 une augmentation de l'éclairement de la source de lumière se produit par l'intervention de l'utilisateur. Ceci conduit dans les dispositifs d'éclairage de l'état de la technique à un saut de la luminance réelle, sous réserve qu'à l'instant T4 les autres paramètres restent inchangés.The Figure 2 indicates the same situation as that described above with reference to the figure 1 , but at a time T 4 an increase in the illumination of the light source occurs by the intervention of the user. This leads in the lighting devices of the state of the art to a jump of the real luminance, provided that at time T4 the other parameters remain unchanged.

La Figure 3 montre un diagramme du type des diagrammes des Figures 1 et 2 représentant l'allure de la luminance et de l'éclairement au cours d'une opération avec un dispositif d'éclairage 1 selon l'invention, qui est adapté pour maintenir la luminance réelle au cours du temps à un niveau constant où à l'intérieur d'un écart limite, et ceci même en présence de modifications de réflectivité des tissus et/ou des situations en superficie et en cavité. L'avantage de ce dispositif d'éclairage 1 est un confort visuel pour l'utilisateur ainsi que l'absence de besoin de modifier la consigne d'éclairement par ce même utilisateur, lorsque la réflectivité et/ou la forme de surface changent. L'éclairement de la source de la lumière 5 est modifié et ajusté automatiquement en fonction de la luminance réelle du champ d'éclairage 2. Lorsque l'un des réflectivité/facteur de luminance et/ou forme de surface/coefficient de luminance du champ d'éclairage 2 changent de façon à engendrer une augmentation de la luminance, l'éclairement est réglé à un niveau plus faible pour éviter un niveau de la luminance réelle trop élevé. Inversement, lorsque l'un des réflectivité/facteur de luminance et/ou forme de surface/coefficient de luminance du champ d'éclairage 2 changent de façon à engendrer un abaissement de la luminance, le dispositif de régulation 7 de l'éclairement de la source de lumière 5 augmente l'éclairement pour éviter une perte de la luminance due à l'absorption de la lumière par les tissus ou par la forme de surface du champ d'éclairage 2.The Figure 3 shows a diagram of the type of diagrams of Figures 1 and 2 representing the appearance of the luminance and the illumination during an operation with a lighting device 1 according to the invention, which is adapted to maintain the actual luminance over time at a constant level or at the within a limit deviation, even in the presence of tissue reflectivity changes and / or surface and cavity situations. The advantage of this lighting device 1 is a visual comfort for the user as well as the lack of need to modify the lighting setpoint by the same user, when the reflectivity and / or the surface shape change. The illumination of the light source 5 is modified and adjusted automatically according to the actual luminance of the illumination field 2. When one of the reflectivity / luminance factor and / or surface shape / luminance coefficient of the field 2 change in order to cause an increase in luminance, the illumination is set to a lower level to avoid a level of the actual luminance too high. Conversely, when one of the reflectivity / luminance factor and / or surface shape / luminance coefficient of the illumination field 2 changes so as to cause a lowering of the luminance, the control device 7 of the illumination of the light source 5 increases the illumination to avoid a loss of luminance due to the absorption of light by the tissue or the surface form of the illumination field 2.

Les informations transmises entre les différents composants décrits ci-dessus le sont par des valeurs. Toutefois, en particulier dans le cas des systèmes analogiques, les informations peuvent être transmises par des signaux autres que des valeurs, par exemple des tensions électriques ou des fréquences.The information transmitted between the different components described above is by values. However, particularly in the case of analogue systems, the information may be transmitted by signals other than values, for example electrical voltages or frequencies.

Le dispositif d'éclairage 1 selon l'invention est particulièrement destiné à l'éclairage opératoire pour la chirurgie mais peut être aussi appliqué au domaine dentaire.The lighting device 1 according to the invention is particularly intended for surgical lighting for surgery but can also be applied to the dental field.

Le dispositif d'éclairage 1 comprend un dispositif de détermination de la luminance réelle 11 adapté pour déterminer la luminance réelle du champ d'éclairage 2 et pour créer et transmettre le signal de luminance réelle au dispositif de régulation 7 de l'éclairement de la source de lumière 5 en fonction de la réflectivité du champ d'éclairage 2. Le dispositif d'éclairage 1 est aussi adapté pour amener ou maintenir la luminosité du champ d'éclairage 2 à l'intérieur d'un domaine de luminosité de consigne ou à une luminosité de consigne lors d'une modification de la réflectivité du champ d'éclairage 2.The lighting device 1 comprises a device for determining the actual luminance 11 adapted to determine the actual luminance of the illumination field 2 and to create and transmit the actual luminance signal to the control device 7 of the illumination of the source 5 is a function of the reflectivity of the illumination field 2. The illumination device 1 is also adapted to bring or maintain the brightness of the illumination field 2 within a set luminosity range or a target brightness when the reflectivity of the illumination field 2 is changed.

Le dispositif d'éclairage a donc les caractéristiques suivantes. Il est un dispositif d'éclairage opératoire comprenant des moyens d'estimation de la luminance réelle du champ d'éclairage ou de l'objet éclairé, en particulier en fonction de la réflectivité et de la forme de surface de l'objet ou du champ d'éclairage, et des moyens de régulation de l'éclairement par l'éclairage opératoire à une valeur de luminance déterminée en fonction de la luminance estimée.The lighting device therefore has the following characteristics. It is an operating lighting device comprising means for estimating the real luminance of the illuminated field or object, in particular as a function of the reflectivity and the surface shape of the object or field lighting, and means for controlling the illumination by the operating light at a luminance value determined according to the estimated luminance.

La valeur de luminance déterminée est de préférence constante sur une période déterminée, en particulier sur au moins 1 min.The luminance value determined is preferably constant over a given period, in particular over at least 1 min.

Claims (10)

  1. A device (1) for lighting an illumination field (2), in particular an operating field, of the type including
    - a light source (5), adapted to light the illumination field (2)
    - a device (7) for regulating the illuminance from the light source (5)
    wherein the device for regulating the illuminance from the light source is adapted to
    (a) receive an actual luminance signal representing the actual luminance of the lighting field (2) and
    (b) control the illuminance from the light source (5) as a function of the actual luminance signal and a luminance set point signal,
    the lighting device (1) further comprising a device for determining the actual luminance (11) adapted to determine the actual luminance of the lighting field (2) and to create and transmit the actual luminance signal to the device for regulating the illuminance from the light source (7), characterized in that
    the device for determining the actual luminance (11) comprises two modules for determining the actual luminance (12) and means (17) adapted to detect an obstacle situated between one of the two modules for determining the actual luminance (12) and the lighting field (2), and in that
    the actual luminance signal transmitted to the device (7) for regulating the illuminance from the light source (5) is that associated with the other module for determining the actual luminance (12).
  2. The lighting device (1) according to claim 1, characterized in that it also comprises a human-machine interface (14) that is adapted to capture luminance set point information and generate the luminance set point signal for the lighting field (2).
  3. The lighting device (1) according to claim 1 or 2, characterized in that it also comprises a device (13) for adjusting the illuminance from the light source (5), controlled by the device (7) for regulating the illuminance from the light source (5).
  4. The lighting device (1) according to claim 3, characterized in that the device (13) for adjusting the illuminance from the light source (5) is adapted to vary the illuminance from the light source (5) by one of the following features:
    - varying the luminous flux of the light source (5),
    - varying the opening of an orifice arranged between the light source (5) and the lighting field (2),
    - moving an optical piece, such as the rotating a polarizer in relation to a second polarizer, so that the angle between their axes, and thus the outgoing luminous flux, is controlled, the two polarizers being placed between the light source (5) and the lighting field (2).
  5. The lighting device (1) according to claim 3 or 4, characterized in that the device (7) for regulating the illuminance from the light source (5) is adapted to
    - compare a difference between the actual luminance signal and the luminance set point signal to a limit luminance deviation value
    - control the device (13) for adjusting the light source (5) when the difference is greater than the limit luminance deviation value to cause the illuminance from the light source (5) to vary such that the difference becomes less than or equal to the limit luminance deviation value, and preferably becomes equal to 0.
  6. The lighting device (1) according to claim 5, characterized in that when the absolute value of the difference is less than the limit luminance deviation value, the device (7) for regulating the illuminance from the light source (5) does not control the device (13) for adjusting the illuminance from the light source (5) or controls it to maintain the illuminance.
  7. The lighting device (1) according to any one of claims 1 to 6, characterized in that the device (7) for regulating the illuminance from the light source (5) is adapted to periodically receive the actual luminance signal by the device (11) for determining the actual luminance and the luminance set point signal.
  8. The lighting device (1) according to any one of claims 1 to 7, characterized in that the device for determining the actual luminance (11) comprises
    - at least one photodiode arranged on a support (4), or
    - at least one CCD camera arranged on a support (4).
  9. The lighting device (1) according to any one of claims 1 to 8, characterized in that said device (7) for regulating the illuminance from the light source (5) comprises a processor (9) and a memory (10).
  10. A use of a lighting device (1) according to any one of the preceding claims to light a physician's operating field.
EP10306015.8A 2009-09-24 2010-09-22 Lighting device with a system for regulating brightness according to the luminosity of the lighting field and corresponding use Active EP2302287B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0956604A FR2950413B1 (en) 2009-09-24 2009-09-24 LIGHTING DEVICE WITH LIGHT CONTROL DEVICE BASED ON THE LUMINANCE OF THE LIGHTING FIELD AND USE THEREOF

Publications (3)

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EP2302287A2 EP2302287A2 (en) 2011-03-30
EP2302287A3 EP2302287A3 (en) 2014-04-30
EP2302287B1 true EP2302287B1 (en) 2016-03-02

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US (1) US8710415B2 (en)
EP (1) EP2302287B1 (en)
JP (1) JP5828624B2 (en)
CN (1) CN102111935B (en)
FR (1) FR2950413B1 (en)

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US9654355B2 (en) 2012-12-13 2017-05-16 Level 3 Communications, Llc Framework supporting content delivery with adaptation services
CN104113946B (en) * 2013-04-17 2017-02-22 宝山钢铁股份有限公司 light source illuminance adaptive control device and light source illuminance adaptive control method
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JP5828624B2 (en) 2015-12-09
JP2011071117A (en) 2011-04-07
EP2302287A2 (en) 2011-03-30
CN102111935A (en) 2011-06-29
US20110068694A1 (en) 2011-03-24
EP2302287A3 (en) 2014-04-30
FR2950413A1 (en) 2011-03-25
US8710415B2 (en) 2014-04-29
CN102111935B (en) 2015-03-04
FR2950413B1 (en) 2013-04-26

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