Photographic lighting device

Abstract

A lighting device, comprising a housing, a planar arrangement of lamps, which are arranged in the housing, and a plate device, which is received on the housing, wherein a housing rear wall is formed by the plate device, the plate device has a circuit board, on which an electric circuit associated with the lamps is arranged, and the plate device has a heat sink device for passive cooling, which is formed by pin-type cooling elements is provided. The application also relates to a headlight.

Claims

1. A lighting device, comprising a housing; a planar arrangement of lamps, which are arranged in the housing; and a plate device, wherein a housing rear wall is formed by the plate device, the plate device being a circuit board, on which an electric circuit associated with the lamps is arranged, and a heat sink device for passive cooling, comprising pin-shaped cooling elements; and a seat integrated into an arrangement of the pin-shaped cooling elements configured to detachably mount a release closure device in the seat, the seat being located at a surface region of a rear side of the circuit board that is without the pin-shaped elements arranged directly thereon, wherein the surface region is surrounded by the pin-shaped cooling elements and directly engages the release closure device when the release closure device is mounted to the lighting device; wherein the pin-shaped cooling elements are arranged directly on the rear side of the circuit board, such that the pin-shaped cooling elements are thermally coupled to a cooling core of the circuit board; wherein the release closure device is formed with a spherical-head coupling in order to mount the lighting device on a spherical head and has a locking device that locks against unintended detachment; wherein the spherical-head coupling has a tensioning device in order to fasten the release closure device on the spherical head and detach the release closure device therefrom; wherein the housing comprises housing portions laterally surrounding the arrangement of the pin-shaped cooling elements, wherein the housing portions comprise heat dissipation openings; wherein the housing is arranged such that the pin-shaped cooling elements are unshielded by housing parts with respect to the surrounding environment on the rear side of the housing.

2. The lighting device according to claim 1, wherein each of the lamps is an LED luminaire.

3. The lighting device according to claim 1, wherein the pin-shaped cooling elements are configured in accordance with at least one of the following designs: adhesively bonded pin-shaped elements, welded pin-shaped elements, soldered pin-shaped elements and press-fitted pin-shaped elements.

4. The lighting device according to claim 1, wherein the cooling core is made of metal.

5. The lighting device according to claim 1, wherein the arrangement of lamps is configured to output light having a colour rendering index of at least 90.

6. The lighting device according to claim 1, wherein the arrangement of lamps is assigned a dimming device configured to dim the lamps.

7. The lighting device according to claim 1, wherein the arrangement of lamps is assigned a temperature measurement device, with which an operating temperature of the lamps is measured.

8. The lighting device according to claim 1, wherein a function frame is arranged on a front side of the housing and is configured to receive and retain one or more function devices on the housing.

9. The lighting device according to claim 1, wherein a fastening device for detachably fastening a soft box is formed on the housing.

10. The lighting device according to claim 1, wherein the release closure device is formed on the housing.

11. The lighting device according to claim 1, wherein the arrangement of lamps is configured to output light having a colour rendering index of at least 95.

Description

BRIEF DESCRIPTION

(1) Preferred embodiments will be explained hereinafter with reference to figures of a drawing, in which:

(2) FIG. 1 shows a perspective illustration of a lighting device from the front,

(3) FIG. 2 shows a perspective illustration of the lighting device from FIG. 1 from behind,

(4) FIG. 3 shows a further perspective illustration of the lighting device from FIG. 1 from behind,

(5) FIG. 4A to 4E show schematic illustrations of a quick release closure device, which is mounted on a spherical head

(6) FIG. 5 shows a perspective illustration of a soft box from the front,

(7) FIG. 6 shows a further perspective illustration of the soft box from FIG. 5,

(8) FIG. 7 shows a schematic illustration of a stand element having two spherical-head elements, and

(9) FIG. 8 shows a schematic illustration of a portion of a stand element with a base plate for mounting of a quick release closure device.

DETAILED DESCRIPTION

(10) FIG. 1 shows a perspective illustration of a lighting device 1 from the front at an angle. The shown lighting device 1 is configured as a headlight for shooting photos or recording video. A plate device or arrangement 3 is received in a housing 2. A plurality of lamps 5 are fitted on a circuit board 4 arranged in the plate device 3, wherein, in the shown example, a regular arrangement is formed. The lamps 5 are LED luminaires (LED=light-emitting diode) in the shown embodiment.

(11) The housing 2 is produced with side walls 6, in which heat dissipation openings 7 are formed. The housing 2 is made of aluminium for example, which is weight-optimising.

(12) On the front side, a function frame 8 is formed on the housing 2 and has two mutually opposed frame parts 8a, 8b, which have guides 9 on the inner side, which are used to receive function devices (not illustrated), for example a lens plate and/or a dispersion plate.

(13) A circuit arrangement is provided on the circuit board 4 and provides the electric circuit for the lamps 5.

(14) FIGS. 2 and 3 show perspective illustrations of the lighting device 1 from behind at an angle. A heat sink device 10 with a base plate 11 and also an arrangement of pin-type body elements 12 is formed, which is used to dissipate the heat produced during operation of the lamps 5. The arrangement of pin-type body elements 12 is delimited laterally by the side walls 6. In the shown embodiment the pin-type body elements 12 are arranged on the rear side of the base plate 11 in accordance with a regular arrangement. The pin-type body elements 12 can be fastened to the base plate 11 with the aid of different connection techniques, including welding, soldering, press-fitting and/or adhesive bonding.

(15) In the shown embodiment the base plate 11 is formed with the aid of the circuit board 4 as part of the plate device 3. At the same time, the plate device 3 together with the circuit board 4 serves as a rear wall of the housing 2.

(16) As can best be seen from FIG. 2, a seat 13 is integrated into the arrangement of cooling pin-type elements 12 so as to detachably mount a quick release closure device 14 in said seat, said quick release closure device being shown in FIGS. 4a to 4e.

(17) According to FIG. 2 connection devices 14 are provided, for example in order to connect an energy supply and/or data or control line connections.

(18) FIG. 4A to 4E show various illustrations of a quick release closure device 15 with a main plate 16, on which a quick release closure 17 is arranged, which, in the shown embodiment, is mounted on a spherical head 18. The quick release closure 17 has a tensioning device 19 in order to open and to close the quick release closure 17. A locking device 20 is provided on the main plate 16 and locks the quick release closure device 15 against an unintended release when the main plate 16 is mounted in the region of the seat 13. To this end, a biased pin engages with an associated seat.

(19) FIGS. 5 and 6 each show a perspective illustration of a soft box 30, which has fastening means 32 in the region of side walls 31, which fastening means are used for push-button fastening to associated fastening means 33 on the housing 2 (see FIGS. 1 to 3). Tensioning elements 34 are provided in the side walls 32 and are formed with the aid of flexible rods, which are in turn received in associated receiving pockets or tabs on the side walls 31 made of flexible material, for example a textile material. Curved portions 36 of the tensioning elements 34 are arranged in a proximal region. Alternatively, the curved portions 36 can also be arranged in the distal region of the side walls 31 (not illustrated). In particular with such an embodiment, end portions of the tensioning elements 34 can protrude beyond the lighting device and can engage with associated recesses on the lighting device when the soft box 30 is fastened.

(20) In the embodiment shown by way of example, four side walls 31 are provided with the associated tensioning elements 34. In other embodiments, a greater number of side walls may also be provided, for example eight partial side walls, which are formed on the soft box around the opening and which are each assigned a tensioning element in a comparable manner. With a square opening of the soft box, two partial side walls can thus be arranged on each of all four sides.

(21) It is clear from FIG. 1 that the function frame 8 has slits 35, with which the curved portions 36 of the tensioning elements 34 engage when the soft box 30 is fitted on the housing 2.

(22) FIGS. 7 and 8 show schematic illustrations of a stand element 40 having a base body 41, on which two spherical-head elements 42, 43 are detachably mounted. Furthermore, a mounting element 44 is arranged on the base body 41, by means of which mounting element the stand element 40 can be mounted on a stand system, for example by being plugged on. The spherical-head elements 42, 43 can be used to detachably mount objects thereon, for example lighting devices, by means of the above-described quick release closure device. Additional apertures 45 are formed in the main body 41 and can also be used to receive the spherical-head elements 42, 43, such that these can be mounted along the base body 41 in various positions.

(23) FIG. 8 shows an embodiment of the stand element 40, in which, in contrast to the illustration in FIG. 5, a mounting base or plate 46 is arranged on the base body 41 and can be used to mount a cutting closure device (see FIGS. 4A to 4E). The stand elements 40 shown in FIGS. 7 and 8 make it possible to mount a plurality of objects, in particular lighting devices, on a stand system. The spherical-head connection supports a flexible adjustability of the physical orientation of the detachably mounted objects.

(24) The features of the invention disclosed in the above description, the drawing and the claims can be of significance both individually and in any combination for the implementation of the invention in the various embodiments thereof.