EP0770949B1 - Lichtempfindliche Vorrichtung zur Regelung der Beleuchtungsstärke in einem Raum - Google Patents

Lichtempfindliche Vorrichtung zur Regelung der Beleuchtungsstärke in einem Raum Download PDF

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Publication number
EP0770949B1
EP0770949B1 EP96810687A EP96810687A EP0770949B1 EP 0770949 B1 EP0770949 B1 EP 0770949B1 EP 96810687 A EP96810687 A EP 96810687A EP 96810687 A EP96810687 A EP 96810687A EP 0770949 B1 EP0770949 B1 EP 0770949B1
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EP
European Patent Office
Prior art keywords
optical system
photosensitive element
photosensitive
conical
angle
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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.)
Expired - Lifetime
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EP96810687A
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English (en)
French (fr)
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EP0770949A1 (de
Inventor
Bernard Grehant
Aurèle Millet
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Somfy SA
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Somfy SA
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3922—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations and measurement of the incident light

Definitions

  • the subject of the invention is a photosensitive device for the installation of lighting level controls a room provided with at least one opening allowing the entry of natural light, this device being intended to be placed within easy reach of the user to deliver a quantity sufficiently representative of the overall brightness level at inside the whole room.
  • the patents FR 91 06 160 and FR 91 08 331 describe systems ensuring the management of light comfort at inside a room with at least one bay allowing the entry of light and equipped with means blackout and / or artificial lighting. These means of occulation or lighting are electrically maneuverable by means of a transportable remote control device, usually placed on the work surface or on the bedside table. They include a light sensor intended to transmit the state of the illumination to a logical processing unit which according to the instruction of illuminance given will send orders through of concealment and illumination for more or less of illumination.
  • the senor Given its small dimensions, the sensor is will find, in such a situation, either in an area brightly lit directly, either in one area only illuminated by diffusion of all surfaces.
  • the illumination of a directly lit surface by the sun being several hundred times greater to the illumination of the same surface subjected to the luminance of the other surfaces of the room, a sensor elementary will give extremely different values in both locations a few inches from distance while the overall level of illumination is the same.
  • the solution which so far has been given to this problem, is to have the light sensors at the ceiling of the premises so that they are not reached by direct sunlight. Now, it makes sense to associate the light sensor with the medium of the concealment means which must necessarily be accessible by the occupant. He is in also advantageous that the sensor is sensitive to the level of illumination close to the user: his plan of work, his bedside table.
  • the object of the invention is to make a small sensor allowing to provide a practical solution.
  • the photosensitive device characterized in that it comprises at less a photosensitive element associated with an optical system weighted integrator with sensitivity attenuated in a range between two values of conical angles ⁇ Cmin and ⁇ Cmax such that ⁇ Cmin is less than ⁇ Smin and that ⁇ Cmax is greater than ⁇ Smax, ⁇ C representing the conical angle of a cone having for vertex photosensitive element and spherical angles ⁇ Smin and ⁇ Smax representing the limits of the portion sphere, centered on the photosensitive element, in which the photosensitive element can be illuminated directly by the sun.
  • the weighted optical system has a attenuated sensitivity in areas where the sensor is likely to be directly lit by the sun, the luminance of direct sunlight perceived by the sensor is much weaker. The sensor is therefore less sensitive to direct sunlight and reacts exclusively at the overall level of illumination.
  • the optical system integrator is injected material and the element photosensitive is embedded in the system material integrative optics.
  • Figures 1 and 2 show the different effects of direct solar radiation to which submitted a sensor placed on a work surface in a room lit across a bay.
  • Figures 3 to 6 are schematic representations the volume of use of a device according to the invention in different premises subject to different effects of direct solar radiation.
  • FIG. 7 illustrates the description of the device according to the invention.
  • Figures 7a, 7b and 7c are diagrams representing different laws of sensitivities to the light of a device according to the invention.
  • Figure 8 is a schematic view of a first embodiment of the device according to the invention.
  • Figure 9 is a schematic view of a second embodiment of the device according to the invention.
  • Figure 10 is a schematic view of a third embodiment of the device according to the invention.
  • Figure 11 is a schematic view of a fourth embodiment of the device according to the invention.
  • Figure 12 is a schematic view of a fifth embodiment of the device according to the invention.
  • Figure 13 is a schematic view of a variant of the fifth embodiment of the device according to the invention.
  • Figures 1 and 2 show a room 1 in which a photosensitive device 2 is placed on a table 3.
  • the device 2 can perceive direct lighting of the sun between a determined angle ⁇ S1 and an angle ⁇ S2 either by the heights HB min and HB max of the bay (Figure 1), either by the extreme values of the solar height (Figure 2) or a combination of the two.
  • angles ⁇ S1 and ⁇ S2 are bounded by angles ⁇ Smin and ⁇ Smax, ⁇ Smin denoting the extreme value of closing of the angle ⁇ S1 and ⁇ Smax designating the value extreme opening of the angle ⁇ S2 when the element photosensitive is moved inside the room.
  • the volume of use of the device according to the invention is different. This volume is such that in each of its points ⁇ Smin remains greater than ⁇ Cmin and ⁇ Smax remains lower than ⁇ Cmax.
  • To determine the volume of use of the device just draw, on the vertical section from the local, a straight line 4 of inclination ⁇ Cmin with respect to vertically and leaning against the top of the bay and a straight line 5 of inclination ⁇ Cmax relative to the vertical and leaning against the lower part of the bay. If the device is located to the left of line 4 or above line 5, sunbeams directly illuminate part of the surface of the device whose sensitivity is not not attenuated.
  • the zenith height of the sun is determined by the latitude of the place and in the majority of cases (urban or hilly area), the height of the sun at the horizon is greater than 20 °.
  • the configuration of the room and its bays will not so in such places more importance as to the risk for the sensor to be lit by the sun at its zenith or on the horizon.
  • volume of use of the same device is represented for the same type of premises, in the same environmental conditions, but at a latitude closer to the equator, such that the sun can be less than 20 ° from the vertical.
  • Volume in this case V2 is limited in this case.
  • FIG. 7 shows schematically a sensor satisfying the above conditions.
  • This sensor comprises a photosensitive element 6, arranged on a base 7 containing the electronics of the sensor, associated with a weighted integrating optical system 8.
  • This sensor exhibits attenuated sensitivity in range 9 between two angle values ⁇ 1 and ⁇ 2.
  • ⁇ 1 (respectively ⁇ 2) is chosen according to optical characteristics of the integrator system weighted 8 and of the conical angle ⁇ Cmax (respectively ⁇ Cmin) wanted.
  • the integrator's sensitivity law can present a sudden change, as shown in Figure 7a.
  • the sensitivity can be, for example, equal to 0.01 for surfaces between the conical angles ⁇ Cmin and ⁇ Cmax and equal to 1 for surfaces remaining.
  • the law of sensitivity can also have a profile to progressive variation as shown in Figure 7b and present a more or less steep slope on the way from the sensitive zone of the device to the minus zone sensitive.
  • the sensitivity will be normal for allow the integration of lighting, for example of the ceiling, just like between ⁇ Cmax and a chosen angle 120 °, to allow the integration of the lighting, for example, the worktop and the floor.
  • This 120 ° angle can be changed, depending on the opening of the normal integration zone.
  • Figures 8 to 11 show several embodiments preferred processes of the invention, in which a value of 20 ° is assigned to the angle ⁇ Cmin and a 80 ° value at angle ⁇ Cmax, these values corresponding to a compromise for an urban local of industrialized country under a latitude of 45 °.
  • the different embodiments of the device according to the invention shown have curves of sensitivity as a function of the angle of illumination different due to their geometric shape the sensitivity of certain sectors angles can also be changed by filing a attenuating mask.
  • FIG. 8 schematically represents a first realization of the device according to the invention.
  • This device includes a photosensitive element 10 on its upper horizontal face and its horizontal face lower.
  • This photosensitive element 10 is disposed at the center of a spherical integrating optical system 11 resting on a base 12 containing the electronics of the device.
  • a transmission mask 13 is affixed to the surface of the integrating optical system between the conical angles ⁇ 3 and ⁇ 4.
  • the angle ⁇ 3 (respectively ⁇ 4) is confused with the angle ⁇ Cmin (respectively ⁇ Cmax).
  • Angle light rays between 0 ° and ⁇ Cmin and between ⁇ Cmax and 120 ° directly reach the photosensitive element 10 after diffraction during the penetration into the integrating optical system 11.
  • the light rays inciting with an angle between ⁇ Cmin and ⁇ Cmax also arrive after diffraction at the photosensitive element, but with intensity greatly reduced due to the transmission mask 13.
  • Figure 9 schematically represents a second realization of the device according to the invention.
  • This device includes a photosensitive element 14 on its upper horizontal face and its horizontal face lower and located in the center of an optical system integrator 15 in the shape of an ellipsoid, resting on a base 16 containing the electronics of the device.
  • This optical system 15 is covered with a mask transmission 17 between the conical angles ⁇ 5 and ⁇ 6.
  • the spokes angle light between 0 ° and ⁇ Cmin and between ⁇ Cmax and 120 ° reach the element directly photosensitive 14 after diffraction during penetration into the integrating optical system 15. Those inciding with an angle between ⁇ Cmin and ⁇ Cmax are first attenuated in their intensity by the mask of transmission 17.
  • a third embodiment of the device according to the invention is shown schematically in the figure 10.
  • This device comprises a photosensitive element 18 on its two upper horizontal faces and lower, located in the center of an optical system integrator 19 fixed to a base 20 containing the electronics of the device.
  • the optical system 19 is consisting of two ellipsoidal parts 19a, 19b symmetrical about the horizontal plane passing through the photosensitive element 18 and interconnected by a cylindrical part 19c.
  • the ellipsoidal part upper 19a is covered between the conical angles ⁇ 7 and ⁇ 8 of a transmission mask 21.
  • the light rays of angle between 0 ° and Cmin and between ⁇ Cmax and 120 ° reach the element directly photosensitive 18 after diffraction during penetration into the optical device.
  • the corner ones between ⁇ Cmin and ⁇ Cmax are attenuated in their intensity when passing through the mask transmission 21.
  • Figure 11 shows a fourth embodiment of the device according to the invention.
  • the device includes here a photosensitive element 22 on its horizontal face superior and an integrating optical system 23 resting on a base 24 containing the electronics of the device.
  • This integrating optical device 23 has a outer surface and an inner surface of different shapes, symmetrical about an axis vertical.
  • the upper part 23a of its outer surface has the shape of an extended F1 hearth dish by a vertical cylindrical part 23b, itself extended by a toric portion 23c.
  • This part toric is formed by the revolution of a circle of center F2 around the vertical axis of symmetry of the system 23.
  • the inner surface has an upper part hemispherical center F1 23d extended by a ring 23rd formed by the revolution of an F2 hearth dish around the vertical axis of symmetry of the system optic 23. It is dimensioned in such a way that it is above the F1 focus of the paraboloid 23a.
  • the toric part 23c of the outer surface and the ring 23e of the interior surface meet on the base 24.
  • the photosensitive element 22 is located at the focus F1 of the dish 23a.
  • a transmission mask 25 is affixed to the dish 23a between the conical angle ⁇ 9 and the edge of the paraboloid and on the cylindrical part 23b of the outer surface of the integrating optical system 23.
  • a transmission mask 26 is affixed to the surface interior of the integrating optical system on the ring 23rd.
  • Angle light rays between 0 ° and ⁇ Cmin directly reach the photosensitive element 22 after diffraction during penetration into the integrating optical system 23.
  • Angle light rays between ⁇ Cmax and 120 ° reach photosensitive element 22 after two reflections, one on the reflective surface formed by the ring 23e of the interior surface of the system optic 23 and the other on the reflecting surface formed by the part of the paraboloid 23a covered with a transmission mask 25 along trajectories between trajectories 27 and 28.
  • Figure 12 shows a fifth embodiment of the device of the invention.
  • This device includes a photosensitive element 29 and an optical system integrator 30 fixed on a base 31.
  • the system optic 30 is symmetrical about a vertical axis passing through the center of the photosensitive element. he includes a conical top or pyramidal extended by a convex ring attached to its base at base 31 and is made of plastic diffusing.
  • a transmission mask 32 is applied on the outside of the integrating optical system 30 between the conical angles ⁇ 10 and ⁇ 11.
  • FIG. 13 A variant of the embodiment of Figure 12 is shown in Figure 13.
  • This variant includes a photosensitive element 33, an optical system weighted integrator 34 and a base 35 similar to those of the previous embodiment.
  • She understands in in addition to a transmission mask 36 arranged at inside the optical system 34 around the element photosensitive 33.
  • This mask 36 is intended to attenuate the intensity of the incident light rays with an angle between the horizontal and the conical angle ⁇ 12. He has one cylindrical shape of axis the axis of symmetry of the system optics 34, a circular section if the system optic has a conical or square shape if the system optic 34 has a pyramidal shape.
  • the optical system 34 is further provided on its inner surface with a reflective plate 37 arranged in such a way that the light rays inciding with an angle greater than ⁇ 13 are focused towards the photosensitive element 33.
  • the mask may have a transmission coefficient zero or nonzero.

Landscapes

  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Television Receiver Circuits (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection-Type Copiers In General (AREA)

Claims (10)

  1. Lichtempfindliche Vorrichtung zur Regelung der Beleuchtungsstärke in einem Raum, mit wenigstens einer Öffnung, die den Einfall natürlichen Lichts erlaubt, wobei diese Vorrichtung dazu bestimmt ist, an dem zu beleuchtenden Ort angeordnet zu werden, um eine für die Beleuchtung an diesem Ort repräsentative Grösse zu erhalten, dadurch gekennzeichnet, dass sie wenigstens ein lichtempfindliches Element (10; 14; 18; 22) aufweist, das einem gewichteten optischen Integriersystem (11; 15; 19; 23) zugeordnet ist, welches innerhalb eines Bereichs zwischen zwei Kegelwinkeln αCmin und αCmax eine gedämpfte Empfindlichkeit hat, wobei αCmin kleiner als αCmax ist und αCmax grösser als αSmax ist und wobei αC den Kegelwinkel eines Kegels darstellt, dessen Scheitel das lichtempfindliche Element ist, und die sphärischen Winkel αSmin und αSmax die Grenzen des Teils der das lichtempfindliche Element als Zentrum umgebenden Kugel sind, in welcher dieses lichtempfindliche Element direkt von der Sonne beleuchtet werden kann.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein auf seinen oberen und unteren horizontalen Seiten lichtempfindliches Element (10) aufweist, welches im Zentrum eines optischen Integriersystems (11) angeordnet ist, das die Form einer Kugel hat und auf einem die Elektronik der Vorrichtung enthaltenden Sockel (12) ruht, und dass auf der Aussenseite des optischen Integriersystems (11) zwischen zwei Winkeln Θ3 und Θ4 eine Transmissionsmaske (13) angeordnet ist.
  3. Vorichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein auf seinen oberen und unteren horizontalen Seiten lichtempfindliches Element (14) aufweist, welches im Zentrum eines optischen Integriersystems (15) in Form eines Ellipsoids angeordnet ist, das auf einem die Elektronik der Vorrichtung enthaltenden Sockel ruht, und dass auf der Aussenseite des optischen Integriersystems (15) zwischen zwei Kegelwinkeln Θ5 und Θ6 eine Transmissionsmaske (17) angeordnet ist.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein auf seinen oberen und unteren horizontalen Seiten lichtempfindliches Element (18) aufweist, welches im Zentrum eines optischen Integriersystems (19) angeordnet und auf einem die Elektronik der Vorrichtung enthaltenden Sockel (20) befestigt ist, dass dieses optische Integriersystem (19) aus zwei ellipsoidischen Teilen (19a, 19b) besteht, die in bezug auf die durch das lichtempfindliche Element (18) gehende horizontale Ebene symmetrisch liegen und durch einen zylindrischen Teil (19c) miteinander verbunden sind, und dass der obere ellipsoidische Teil (19a) zwischen den Winkeln Θ7 und Θ8 mit einer Transmissionsmaske (21) bedeckt ist.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein auf seiner oberen horizontalen Seite lichtempfindliches Element (22) und ein optisches Interiersystem (23 aufweist, welches in bezug auf eine vertikale Achse symmetrisch ist und auf einem die Elektronik der Vorrichtung enthaltenden Sockel (24) ruht, dass der obere Bereich (23a) der Aussenseite des optischen Systems (23) die Form eines Paraboloids mit dem Brennpunkt F1 hat und dieser Paraboloid (23a) durch einen zylindrischen Teil (23b) verlängert ist, der seinerseits durch einen torusförmigen Teil (23c) verlängert ist, welcher durch Umdrehung eines Kreises mit dem Zentrum F2 um die vertikale Symmetrieachse des optischen Systems erzeugt wird, dass die Innenseite des optischen Systems (23) einen oberen halbkugelförmigen Bereich (23d) mit dem Zentrum F1 hat, welcher durch einen Ring (23e) verlängert ist, der durch Umdrehung einer Parabel mit dem Brennpunkt F2 um die vertikale Symmetrieachse des optischen Systems (23) erzeugt wird, dass der torusförmige Teil (23c) der Aussenseite sowie der Ring (23e) der Innenseite auf dem Sockel (24) zusammentreffen, dass auf dem Paraboloid (23a) zwischen einem Winkel Θ9 und dem Rande des Paraboloids und auf dem zylindrischen Teil (23b) der Aussenseite des optischen Systems (23) eine reflektierende Transmissionsmaske (25) angeordnet ist, und dass auf dem Ring (23e) der Innenseite des optischen Systems (23) ebenfalls eine reflektierende Transmissionsmaske (26) angeordnet ist.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein auf einem Sockel (31; 35) befestigtes lichtempfindliches Element (29; 33) und ein optisches Integriersystem (30; 34) aufweist, welches in bezug auf eine vertikale, durch das Zentrum des lichtempfindlichen Elements gehende Achse symmetrisch ist, dass das optische Integriersystem in seinem oberen Teil eine konische oder pyramidale Form hat und dass dieser konische oder pyramidale Teil durch einen konvexen Ring verlängert ist, welcher mit seiner Basis auf dem Sockel (31; 35) befestigt ist.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass auf der Aussenseite des optischen Integriersystems (30) zwischen den Kegelwinkeln Θ10 und Θ11 eine Transmissionsmaske angeordnet ist.
  8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass im Inneren des optischen Integriersystems (34) eine Transmissionsmaske (36) um das lichtempfindliche Element (33) herum angeordnet ist und diese Transmissionsmaske (36) so dimensioniert ist, dass sie die Intensität der unter einem Winkel zwischen Θ12 und der Horizontalen einfallenden Lichtstrahlen, nachdem diese das optische System durchquert haben, dämpft, und dass auf der Innenseite des optischen Integriersystems (34) eine reflektierende Platte (37) angeordnet ist, welche die Lichtstrahlen, deren Einfallswinkel grösser als ein Kegelwinkel Θ13 ist, auf das lichtempfindliche Element fokussiert.
  9. Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass das gewichtete optische Integriersystem (11; 15; 19) aus gespritztem Material besteht und dass das lichtempfindliche Element (10; 14; 18) in das Material des optischen Systems (11; 15; 19) eingebettet ist.
  10. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass das optische System aus zerstreuendem Kunststoffmaterial besteht.
EP96810687A 1995-10-25 1996-10-14 Lichtempfindliche Vorrichtung zur Regelung der Beleuchtungsstärke in einem Raum Expired - Lifetime EP0770949B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512581A FR2740573B1 (fr) 1995-10-25 1995-10-25 Dispositif photosensible pour l'installation de commandes du niveau d'eclairement d'un local
FR9512581 1995-10-25

Publications (2)

Publication Number Publication Date
EP0770949A1 EP0770949A1 (de) 1997-05-02
EP0770949B1 true EP0770949B1 (de) 2001-09-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810687A Expired - Lifetime EP0770949B1 (de) 1995-10-25 1996-10-14 Lichtempfindliche Vorrichtung zur Regelung der Beleuchtungsstärke in einem Raum

Country Status (6)

Country Link
EP (1) EP0770949B1 (de)
JP (1) JPH09178552A (de)
AT (1) ATE205315T1 (de)
DE (1) DE69614964D1 (de)
ES (1) ES2104540T1 (de)
FR (1) FR2740573B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041396C2 (de) * 1980-11-03 1983-10-27 Karl Albert 7000 Stuttgart Krieger Lichtfühler-Einrichtung zur Anpassung der Beleuchtung eines vorgegebenen Bereichs an die Helligkeit von Fremdlicht
NO158389C (no) * 1985-03-04 1988-08-31 Sintef Anordning for styring av belysningsarmatur.
DE3526590A1 (de) * 1985-07-25 1986-01-02 Zinnecker, Elisabeth, 7891 Lottstetten Verfahren und anordnung zur steuerung einer beleuchtungsanlage
FR2676842B1 (fr) * 1991-05-22 1993-09-17 Somfy Installation de commande automatique du niveau d'eclairement d'un local.
FR2678752B1 (fr) * 1991-07-03 1993-10-29 Somfy Installation de commande du niveau d'eclairement d'un local.

Also Published As

Publication number Publication date
DE69614964D1 (de) 2001-10-11
ES2104540T1 (es) 1997-10-16
EP0770949A1 (de) 1997-05-02
FR2740573B1 (fr) 1997-12-26
ATE205315T1 (de) 2001-09-15
FR2740573A1 (fr) 1997-04-30
JPH09178552A (ja) 1997-07-11

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