WO2012036623A1

WO2012036623A1 - A lighting head, a fastening fixture and a reflector for a lighting system

Info

Publication number: WO2012036623A1
Application number: PCT/SE2011/051114
Authority: WO
Inventors: Anton Falk; Bo Dalenius; Göran MARÉN; Pär BLIXT; Tommy SUNDSTRÖM; Jonny Svensson
Original assignee: Profoto Ab
Priority date: 2010-09-17
Filing date: 2011-09-15
Publication date: 2012-03-22
Also published as: EP2616739A4; EP2616739B1; EP2616739A1

Abstract

This disclosure relates to a reflector for use in a lighting head arranged to be detachably connected to the lighting head. This disclosure also relates to a fastening fixture for a lighting head arranged to detachably connect a reflector to the lighting head and a lighting head being arranged to detachably connect a reflector to the lighting head. Fig.

Description

A LIGHTING HEAD, A FASTENING FIXTURE AND A REFLECTOR FOR A LIGHTING SYSTEM

TECHNICAL FIELD

The present invention relates to the field of lighting systems, in particular to a lighting head, a fastening fixture and a reflector for providing light in a lighting system.

BACKGROUND

A lighting system normally comprises at least one lighting head having a reflector arranged to dispurse light from a light source located at suitable focal point of the reflector.

SUMMARY

According to one aspect, this disclosure relates to a reflector for use in a lighting head arranged to be detachably connected to the lighting head.

The reflector may comprise an aperture for receiving a light source; and fastening means arranged to be detachably connected to the lighting head such that the light source extends through the aperture and at least a portion of the light from the light source is reflected of a reflective surface of the reflector.

The fastening means may be arranged to be detachably mounted and secured by at least one fastening fixture comprised in the lighting head. The fastening means may also comprise at least one protrusion or extension of the reflector extending away from the opening of the reflector located opposite the aperture, the at least one protrusion or extension of the reflector being arranged to be received by a reception cavity of the at least one fastening fixture comprised in the lighting head.

According to a further aspect, this disclosure also relates to a fastening fixture for a lighting head arranged to detachably connect a reflector to the lighting head.

As the lighting head may comprise a first reflector having a first reflective surface and a first aperture for receiving a light source, the fastening fixture may further comprise a first receiving means for detachably connecting a lens to the lighting head in front of the light source, and the fastening fixture may further aslo comprise at least a second receiving means for detachably connecting a second reflector to the lighting head. The first and second receiving means may be arranged such that the light source extends through a second aperture of the second reflector for receiving the light source and such that at least a portion of the light from the light source is reflected of the reflective surface of the second reflector. The first receiving means may be a first reception cavity and the second receiving means may be at least one second reception cavity for detachably connecting a second reflector to the lighting head. The fastening fixture may comprise two or more reception cavities for detachably connecting the second reflector to the lighting head.

According to yet a further aspect, this disclosure also relates to a lighting head being arranged to detachably connect a reflector to the lighting head.

The lighting head may comprise a fastening fixture for detachably connecting the reflector to the lighting head. The lighting head may also comprise a first reflector having a first reflective surface and a first aperture for receiving a light source being arranged to detachably connect a second reflector to the lighting head.

A BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present invention will become readily apparent to those skilled in the art by the following detailed description of exemplary embodiments thereof with reference to the accompanying drawings, wherein:

Fig. 1 illustrates a side view of an embodiment according to the invention,

Fig. 2 illustrates a front view of an embodiment according to the invention shown in Fig. 1 ,

Fig. 3 illustrates embodiments of a device and a system providing continous light according to the invention,

Fig. 4 illustrates a flowchart of an embodiment of the method according to the invention.

Fig. 5 illustrates a flowchart of another embodiment of the method according to the invention.

Fig. 6 illustrates a side view of an embodiment of a connector for the cable

device shown in Fig. 3. The figures are schematic and simplified for clarity, and they merely show details which are essential to the understanding of the invention, while other details have been left out. Throughout, the same reference numerals are used for identical or corresponding parts or steps.

DESCRIPTION

Fig. 1 shows a side view of embodiments of a lighting head 1 , a fastening fixture 5 and a reflector 6 according to the invention. The lighting head 1 comprises a first reflector body 2 having a first reflector 4. The first reflector body 2 comprises a first aperture 8 for receiving a light source 7. The light source 7 may be entered through an opening at the back end of the first reflector body 2 and may be extended through the first aperture 8 such that at least a portion of the light from the light source 7 may be reflected of the first reflector 4. The first reflector 4 comprises a first reflective surface 4A which is arranged to reflect light from the light source 7 out through the larger forward facing opening of the first reflector body 2.

The first reflector body 2 may also comprise a fastening member 3 for safely securing the light source 7 as it is has been entered through the opening at the back end of the first reflector body 2. The fastening member 3 enables the light source 7 to be moved forward or backwards through the opening at the back end of the first reflector 2 and be tightly secured to the first reflector body 2 once a suitable placement of the light source 7 has been found.

The lighting head 1 may also comprise fastening fixure 5. The fastening fixture 5 may be any form of fastener, fastening device or holding device. The fastening fixture 5 may be movabely arranged between a first open position and a second locked position. In Fig. 1 , the fastening fixture 5 is shown in its second locked position. The fastening fixture 5 may be arranged to move between the first open position and the second locked position through a moving member 5C. The moving member 5C may be connected between the first reflector body 2 and the fastening fixture 5. The moving member 5 may preferably be a spring operated member or any form of member enabling the fastening fixture 5 to be rotated around the centre of the member 5C between a first open position and a second locked position.

The fastening fixture 5 may also comprise a first receiving means 5A for detachably connecting a lens 10 to the lighting head 1 in front of the light source 7. One example of such a receiving means is a first reception cavity 5A. The lens 10 may be placed in the first reception cavity 5A of the fastening fixture 5 and be securely fastened to the first reflector body 2 in front of the light source 7 by moving the fastening fixture 5 into the second locked position (as shown in Fig. 1 ).

According to some embodiments of the invention, the fastening fixture 5 further comprises a second receiving means for detachably connecting a second reflector 6 to the lighting head 1. One example of such a second receiving means is at least one second reception cavity 5B. The at least one second reception cavity 5B of the fastening fixture 5 may be arranged to receive a fastening means 6B of the second reflector 6. The fastening means 6B of the second reflector 6 may be placed in the second reception cavity 5B of the fastening fixture 5 and be securely fastened to the first reflector body 2 by moving the fastening fixture 5 into the second locked position (as shown in Fig. 1 ). The fastening fixture 5 may be arranged to securely fasten the second reflector 6 to the first reflector body 2 such that the light source 7 may extend through an aperture 9 of the second reflector 6 configured to receive the light source 7. The fastening fixture 5 may also be arranged to securely fasten the second reflector 6 such that at least a portion of the light from the light source 7, when extended through the aperture 9 of the second reflector 6, is reflected of a reflective surface 6A of the second reflector 6 out through the larger forward facing opening of the first reflector body 2.

It should be noted that any number of fastening fixtures 5 may be used in order to detachably connect a second reflector 6 and/or the lens 10 to the first reflector body 2. In Fig. 2, four fastening fixtures 5 are arranged on the first reflector body 2. Fig. 2 also shows the fastening fixtures 5 in their second locked position.

The second reflector 6 is arranged to be detachably connected to the lighting head 1. The second reflector 6 is arranged to be received in the first reflector body 2 of the lighting head 1. The second reflector 6 may comprise an aperture 9 for receiving a light source 7. The second reflector 6 may also comprise fastening means 6B arranged to be detachably connected to the lighting head 1. The fastening means 6B of the second reflector may be arranged so as to enable the light source 7 to extend through the aperture 9. The fastening means 6B of the second reflector may be arranged such that the light source 7 may extends through the aperture 9. The fastening means 6B of the second reflector may be arranged to enable the second reflector 6 to be positioned such that at least a portion of the light from the light source 7 may be reflected of the reflective surface 6A of the second reflector 6. The fastening means 6B may be arranged to be detachably mounted and securely fastened by at least one fastening fixture 5 comprised in the lighting head 1. According to some embodimetns, the fastening means 6B may comprise at least one protrusion of the second reflector 6 extending away from the forward faceing opening of the reflector 6 located opposite the aperture 9. The at least one protrusion of the second reflector 6 extending away from the forward faceing opening of the reflector 6 and towards the fastening fixture 5 of the first reflector body 2 may be arranged to be received by the second reception cavity 5B of the at least one fastening fixture 5 of the first reflector body 2 in the lighting head 1 . However, it should also be noted that although the fastening means 5 may comprise any form of protrusion or extension of the second reflector 6 arranged to be received by the second reception cavity 5B of the at least one fastening fixture 5 of the first reflector body 2 in the lighting head 1 , the fastening means 5 may also comprise any form of fastener, fastening device or holding device arranged to be received by the at least one fastening fixture 5 of the first reflector body 2 in the lighting head 1.

The embodiments of the invention described above provides for a lighting head 1 in which a first reflector 4 may be easily replaced by an exchangeable second reflector 6. Advantageously, this allows an operator of the lighting head 1 to adjust the reflecting properties of the lighting head 1 in a simple and cost-efficient manner.

According a further aspect of the invention, the invention also relates to a method, devices and system for providing continuous light.

This relates to the field of lighting systems, in particular to a method, devices and system for providing continuous light in a continuous lighting system.

A continuous lighting system normally comprises at least one lighting unit having at least one light source being connected via a power cable to a ballast or generator unit in order to receive a power supply signal.

According to one aspect, this disclosure relates to a lighting unit comprising at least one light source for providing continuous light, the lighting unit comprising a processing unit configured to send control signals to a ballast or generator unit for controlling the power supplied to the at least one light source by the ballast or generator unit.

According to yet a further aspect, this disclosure also relates to a method for use in a lighting unit comprising at least one light source for providing continuous light, comprising the steps of: sending control signals to a ballast or generator unit for controlling the power supplied to the at least one light source by the ballast or generator unit.

According to yet a further aspect, this disclosure also relates to a cable comprising a first communication path being arranged to transmit control signals to a ballast or generator unit and a second communication path being arranged to transmit a power signal from the ballast or generator unit to a lighting unit.

According to yet a further aspect, this disclosure also relates to a cable connector comprising electrical pin connectors, wherein at least a first electrical pin connector is arranged to receive control signals to a ballast or generator unit and at least a second electrical pin connector is arranged to transmitting a power signal from the ballast or generator unit, the pin(s) of the at least second electrical pin connector being longer than the pin(s) of the first pin electrical connector.

According to yet a further aspect, this disclosure also relates a ballast or generator for providing a power signal to lighting unit comprising a cable connector.

Fig. 3 shows embodiments of a lighting unit 10, a cable 1 10 and connectors 19, 1 12 for use in a lighting system 100 for providing continous light according to the invention.

Fig. 3 shows a remote control unit 1 1. The remote control unit 1 1 may be used by an operator of the lighting system 100 to transmit control signals and/or other data information to a lighting unit 10. The remote control unit 1 1 may comprise input devices for receiving inputs from an operator of the remote control unit 1 1 , and may also comprise indicating means for displaying information to the operator of the remote control unit 1 1 , such as, for example, a display and/or indicator lights. The input devices may be used by an operator to control the performance of a light source 1 13 of the lighting unit 10. Examples of control functions for controlling the performance of a light source 1 13 that may be performed using the input devices of the remote control unit 1 1 may be, for example, dimming the light source 1 13, controlling the fan speed of a fan unit 1 14, turning the light source 1 13 on and off, etc.

The remote control unit 1 1 may comprise a radio unit (for example, a radio transmitter, radio receiver or radio transceiver) arranged to relay control signals and/or other data information to/from other radio units (for example, a radio transmitter, radio receiver or radio transceiver), such as, for example, a radio unit 120 in a computer 1 19 and/or a radio unit 12 in the lighting unit 10. The radio unit 12 in the lighting unit 10 may also be referred to a receiving unit, although it may also be used for transmitting control signals and/or data information back to the remote control unit 1 1 and/or the computer 1 19. The remote control unit 1 1 may be any handheld device comprising a radio unit arranged to communicate with another radio unit located in the lighting unit 10.

The computer 1 19 comprising the radio unit 120 may also be arranged to relay control signals and/or other data information to/from other radio units, such as, the remote control unit 1 1 and/or radio unit 12 in the lighting unit 10.

The lighting unit 10 may also be referred to a lamp or lamp unit. In the lighting unit 10, the radio unit 12 may be communicatively connected to a processing unit 13. The processing unit 13 may further be communicatively connected to all of the following units that may be present in the lighting unit 10: a persistent memory unit 14, a time counter 15, one or more input devices 16, a display 17, a cable connector 19, at least one light source 1 13, a fan unit 1 14, a temperature sensor 1 15, a zero-cross detector 1 16, and a light source voltage monitoring unit 1 17. The lighting unit 10 may also comprise an ignitor unit 1 18. The ignitor unit 1 18 may be arranged to boosting the voltage to ignite the bulb. The lighting unit 10 may be connected to a ballast or generator unit 1 1 1 via the cable connector 19.

The time counter 15, which also may be implemented as a software in the processing unit 12, may be arranged to, for example, count the hours of the usage of the light source 1 13 and store this time information in the persistent memory unit 14. The one or more input devices 16 may represent different control functions of the lighting unit 10 and may comprise, for example, a dimmer knob arranged to indicate a specific amout of dimming of the light source 1 13 desired by an operator (e.g. a dimming percentage of the maximum effect of the light source 1 13) and/or a fan mode button for setting the speed of the fan unit 1 14 (e.g. in order to eliminate any sound from the lighting unit 1 13) and/or an on/off-button for turning the light source 1 13 on or off. The display 17 may be used by the processing unit 13 for displaying information indicative of the performance of the at least one light source 1 13. The display 17 may also be used by the processing unit 13 for displaying information showing the selected setting(s) of the lighting unit 10, a time counter value of the usage of the light source 1 13, which radio channel the radio unit 12 in the lighting unit 10 is set to, and which group of lighting units the lighting unit 10 belong to (if any). The cable connector 19 may be arranged to connect the lighting unit 10 with a ballast or generator unit 1 1 1 via a cable 1 10. The cable connector 19 may be arranged to transmit control signals to the ballast or generator unit 1 1 1 through the cable 1 10 and receiving a power signal from the ballast or generator unit 1 1 1 through the same cable 1 10 in response to the control signals sent to the ballast or generator unit 1 1 1 . The control signals may be DMX control signals and may also comprise DMX logical power signals. The received power signal provides power to the light source 1 13. The cable connector 19 and the cable connecting the lighting unit 10 and the ballast or generator unit 1 1 1 are described in more detail below with reference to Figs. 5-6. The light source 1 13 may be a Metal Hallide Discharge (HMI) bulb or a standard halogen bulb. However, these examples are not to be considered limited, since other similar bulbs may also be used in a similar manner by the invention. The fan unit 1 14 may be arranged to cool, i.e. lower the temperature, of the light source 1 13. The zero cross detector 1 16 may sense the voltage polarity-switching at the zero voltage point, of the bulb voltage. The light source voltage monitoring unit 1 17 may monitor the voltage over the light source.

According to some embodiments, the processing unit 12 in the lighting unit 10 may be configured to send control signals to a ballast or generator unit 1 1 1 for controlling the power supplied to the at least one light source 1 13 by the ballast or generator unit 1 1 1. The control signals may be DMX control signals and may also comprise DMX logical power signals. The control signals may be based on received or retrieved

measurements indicative of the performance of the at least one light source 1 13. These measurements signals may originate from or be retrieved from, for example, the persistent memory unit 14, the time counter 15, the fan unit 1 14, the temperature sensor 1 15, the zero-cross detector 1 16, and/or the light source voltage monitoring unit 1 17.

According to some embodiments, the processing unit 13 may be arranged to receive measurements indicative of the performance of the at least one light source 1 13 from the temperature sensor 1 15. The processing unit 13 may then send control signals to a fan unit 1 14 based on received measurements indicative of the performance of the at least one light source 1 13 in combination with control signals to a ballast or generator unit 1 1 1. This may, for example, be performed in case the processing unit 13 has detected that there is a risk that the light source 1 13 is going to be overheated, whereby the processing unit 13 may change to fan speed of the fan unit 1 14 and/or send control signals to a ballast or generator unit 1 1 1 to reduce the power to the light source 1 13.

According to some embodiments, the processing unit 13 may be arranged to receive measurements indicative of the performance of the at least one light source 1 13 from the zero-cross detector 1 16 and the light source voltage monitoring unit 1 17. The processing unit 13 may be arranged to send control signals to the ballast or generator unit 1 1 1 based on received measurements indicative of the performance of the at least one light source 1 13 from the zero-cross detector (1 16) and/or the light source voltage monitoring unit 1 17. This may, for example, be performed in case the processing unit 13 detects that the ignitor unit 1 18 being arranged to ignite the light source 1 13, it not successful in igniting the light source 1 13. Thus, in order to prevent damage to the light source 1 13, the lighting unit 10 or the ignitor unit 1 18, the processing unit 13 may send control signals to the ballast or generator unit 1 1 1 to stop providing power signal to the light source 1 13.

According to some embodiments, the processing unit 12 may be configured to receive control signals and/or data information from the radio unit 12 and/or from the one or more input devices 16 for controlling the performance of the at least one light source 1 13. The processing unit 12 may also be configured to receive or retrieve

measurements indicative of the actual performance of the light source 1 13. These measurements signals may originate from or be retrieved from, for example, the persistent memory unit 14, the time counter 15, the fan unit 1 14, the temperature sensor 1 15, the zero-cross detector 1 16, and/or the light source voltage monitoring unit 1 17. The processing unit 13 may be configured to modify the received control signals based on the received measurements indicative of the performance of the light source 1 13. The processing unit 13 may also be configured to send these modified control signals to a ballast or generator unit 1 1 1 .

It should be noted that the processing unit 12 may comprise logic for performing the functionality of the lighting unit 10. This functionality may be implemented by means of a software or computer program. The processing unit 12 may also comprise storage means or a memory unit 14 for storing the computer program and processing means, such as e.g. a microprocessor or microcontroller, for executing the computer program. The storage means may also be readable storage medium separated from, but connected to the processing unit 12. When, it is described herein that the processing unit 12 performs a certain action or function it is to be understood that the processing unit 12 may use its processing means to execute a certain part of the software or computer program which may be stored in its storage means 14. The processing unit 12 in the lighting unit 10 may be configured to perform the steps of the method as described with reference to Fig. 4.

According to one aspect, a computer program product may be provided for use in a processing unit 12 in a lighting unit 10 as described in any of the embodiments above, which comprises computer readable code means, which when run in the processing unit 12 in the transmitting node causes the processing unit 12 to perform any one of the steps described in any of the methods described above. The code means of the computer program product may be stored on any form of readable storage medium, such as, for example, in the persistent memory 14.

Fig. 4 shows a flowchart of an embodiment of the method for use in a lighting unit 10 comprising at least one light source 1 13 for providing continuous light.

In step S41 , the processing unit 13 may receive or retrieve measurements indicative of the performance of the light source 1 13. These measurements may originate from or be retrieved from, for example, the persistent memory unit 14, the time counter 15, the fan unit 1 14, the temperature sensor 1 15, the zero-cross detector 1 16, and/or the light source voltage monitoring unit 1 17.

In step S42, the processing unit 13 may send control signals to a ballast or generator unit 1 1 1 , wherein the control signals may be based on the received measurements indicative of the performance of the light source 1 13. The control signals may control the power supplied to the light source 1 13 by the ballast or generator unit 1 1 1 .

Fig. 5 illustrates a flowchart of another embodiment of the method for use in a lighting unit 10 comprising at least one light source 1 13 for providing continuous light.

In step S51 , the processing unit 13 may receive control signals for controlling the performance of the light source 1 13. The control signal may be wirelessly received from a remote control unit 1 1 or received manually through the input devices 18 on the lighting unit 10.

In step S52, the processing unit 13 may receive measurements indicative of the performance of the light source 1 13. These measurements may originate from or be retrieved from, for example, the persistent memory unit 14, the time counter 15, the fan unit 1 14, the temperature sensor 1 15, the zero-cross detector 1 16, and/or the light source voltage monitoring unit 1 17.

In step S53, the processing unit 13 may modify the received control signals based on the received measurements in the lighting unit 10 indicative of the performance of the light source 1 13.

In step S54, the processing unit 13 may send the modified control signals to a ballast or generator unit 1 1 1 . The control signals may control the power supplied to the light source 1 13 by the ballast or generator unit 1 1 1 . Fig. 6 shows a side view of an embodiment of a connector for the cable shown in Fig. 3.

The cable 1 10 may comprise a first communication path (1 10A in Fig. 3) being arranged to transmit control signals to a ballast or generator unit 1 1 1 and a second communication path (1 10B in Fig. 3) being arranged to transmit a power signal from the ballast or generator unit 1 1 1 to a lighting unit 10. The control signals are DMX control signals and DMX logical power signals following the DMX protocol.

The cable connector 1 10 may be arranged to receive control signals to a ballast or generator unit 1 1 1 and transmit a power signal from the ballast or generator unit 1 1 1 . The control signals are DMX control signals and DMX logical power signals. The cable connector 1 10 may comprise electrical pin connectors, wherein at least a first electrical pin connector may be arranged to receive control signals to a ballast or generator unit 1 1 1 and at least a second electrical pin connector may be arranged to transmitting a power signal from the ballast or generator unit 1 1 1 . The pin(s) of the at least second electrical pin connector may be longer than the pin(s) of the first pin electrical connector. This may be performed so as to ensure that the power supply to the light source 1 13 is stopped, before the control signals to the ballast or generator 1 1 1.

The cable connecter may advantageously be fitted to a ballast or generator unit 1 1 1 for providing a power signal to lighting unit 10.

Using only one cable for both DMX and the Power to the HMI lamp

One reason to have one cable with cords for both DMX control of the ballast or generator unit 1 1 1 , and the power from the ballast to the light source 1 13 (e.g. HMI bulb) is that it is simple and easier to use than when having multiple cables. DMX communication will come from the lighting unit 10 and not from an external DMX controlling device. Some effects of using of using one cable and one connector

• Impossible for user to connect DMX cable to wrong Ballast when using many ballasts and lamps,

• Physical control of what order the pins are connected. By using different length of the connector pins inside of the connector. This means that the DMX control signal always can be connected/disconnected first or last,

• Different keying possibilities of different female and mails connectors is

enabled.

Radio Radio unit that can relay data wirelessly to other Radio units, both directions receive/transmit.

Display

Display for showing information e q dimming percentage

Dimmer knob

Rotary knob for input of e q dimming percentage

Fan mode button

Button for input of e g Fan speed

On button

Temperature

Sensors giving input of actual temperature

Fan

Fan for cooling

Logical power

Sense of the presence of logical power

Bulb voltage

Sense of the voltage to the bulb

Zero cross detector

Sense of the voltage polarity-switching at the zero voltage point, of the bulb voltage Ignitor

Boosting the voltage to ignite the bulb

Bulb

Ballast

The ballast can regulate the power to the bulb

Remote control

Handheld unit that can through a radio unit can communicate with the HMI Lamp Computer program

Computer program that through a radio unit can communicate with the HMI Lamp The Microcontroller has a program that controls the Ballast power and the fan speed and the bulb ignitor. The control is dependent of the inputs to the microcontroller

• Fan mode button are used to set the fan speed (eliminate any sound from the lamp)

• Dimmer knob is used to change the power to the bulb from the ballast · The display is used to show the user the selected setting and the time counter of the lamp usage and radio channel and group. • Temperature inputs are used to protect the lamp from over heat by means of changing the fan speed and/or the power to the bulb

• The program has a software time counter that counts the hours of the usage of the lamp and stores this the persistent memory

• The microcontroller controls/changes the power to the bulb troue the DMX

protocol

• The zero cross detector and bulb voltage are used to determine the sate of the ballast

• The radio are used for wireless control of the lamp

• The logical power are used to determine the type of ballast, e g Profoto Ballast can have logical power and other brand ballast with adapter can not have logical power

According to one aspect of the invention, a lighting unit 10 comprising at least one light source 1 13 for providing continuous light is provided. The lighting unit 10 comprising a processing unit 13 configured to send control signals to a ballast or generator unit 1 1 1 for controlling the power supplied to the at least one light source 1 13 by the ballast or generator unit 1 1 1 .

According to one aspect of the lighting unit 10, the processing unit 13 is configured to send the control signals based on received measurements indicative of the

performance of the at least one light source 1 13.

According to another aspect of the lighting unit 10, the lighting unit 10 comprises a receiving unit configured to receive control signals for controlling the performance of the at least one light source 1 13, and wherein the processing unit 13 is configured to modify the received control signals based on received measurements in the lighting unit 10 indicative of the performance of the at least one light source 1 13.

According to a further aspect of the lighting unit 10, the processing unit 13 is arranged to receive measurements indicative of the performance of the at least one light source 1 13 from a temperature sensor 1 15 in the lighting unit 10.

According to yet another aspect of the lighting unit 10, the processing unit 13 is arranged to send control signals to a fan unit 1 14, said fan unit 1 14 being arranged to lower the temperature of the at least one light source 1 13, based on received measurements indicative of the performance of the at least one light source 1 13 and the control signals to the ballast or generator unit 1 1 1 . According to yet another aspect of the lighting unit 10, the processing unit 13 is arranged to receive measurements indicative of the performance of the at least one light source 1 13 from a zero-cross detector 1 16 and a light source voltage monitoring unit 1 17.

According to yet another aspect of the lighting unit 10, the processing unit 13 is arranged to send control signals to a ballast or generator unit 1 1 1 based on received measurements indicative of the performance of the at least one light source 1 13 from the zero-cross detector 1 16 and/or the light source voltage monitoring unit 1 17, in order to control an ignitor unit 1 18 in the lighting unit 10, said ignitor unit 1 18 being arranged to ignite the light source 1 13 in the lighting unit 10.

According to yet another aspect of the lighting unit 10, the light source 1 13 is a Metal Hallide Discharge (HMI) lamp or a standard halogen lamp.

According to yet another aspect of the lighting unit 10, the processing unit 13 is arranged to display information on a display unit 17 on the continuous lighting unit 10 indicative of the performance of the at least one light source 1 13.

According to yet another aspect of the lighting unit 10, the receiving unit is a radio unit 12 configured to wirelessly receive the control signals from a remote control unit 1 1 .

According to yet another aspect of the lighting unit 10, the receiving unit is at least one input device 18 configured to receive the control signals manually on the continuous lighting unit 10.

According to yet another aspect of the lighting unit 10, the lighting unit 10 further comprises a connecting unit 19 for connecting to a cable device 1 10, the connecting unit 19 being arranged to send control signals to the ballast or generator unit 1 1 1 through the cable device 1 10 and receiving a power signal from the ballast or generator unit 1 1 1 through the same cable device 1 10 in response to the control signals sent to the ballast or generator unit 1 1 1 .

According to another aspect of the invention, a method for use in a lighting unit 1 comprising at least one light source 1 13 for providing continuous light is provided. The method comprising the step of: sending control signals to a ballast or generator unit 1 1 1 for controlling the power supplied to the at least one light source 1 13 by the ballast or generator unit 1 1 1 .

According to one aspect of the method, the control signals based on received measurements indicative of the performance of the at least one light source 1 13. According to another aspect of the method, the method further comprises the steps of: receiving control signals for controlling the performance of the at least one light source 1 13; received measurements indicative of the performance of the at least one light source 1 13; and modifying the received control signals based on the received measurements in the lighting unit 10 indicative of the performance of the at least one light source 1 13.

According to a further aspect of the method, the method further comprises the step of: sending the modified control signals to a ballast or generator unit 1 1 1.

According to yet another aspect of the method, the method further comprises the step of: receiving measurements indicative of the performance of the at least one light source 1 13 from a temperature sensor 1 15 in the lighting unit 10.

According to yet another aspect of the method, the method further comprises the step of: sending control signals to a fan unit 1 14 in the lighting unit 10 based on received measurements indicative of the performance of the at least one light source 1 13 and the sent modified control signals to a ballast or generator unit 1 1 1.

According to yet another aspect of the method, the method further comprises the step of: receiving measurements indicative of the performance of the at least one light source 1 13 from a zero-cross detector 1 16 and a light source voltage monitoring unit 1 17.

According to yet another aspect of the method, the method further comprises the step of: sending modified control signals to a ballast or generator unit 1 1 1 based on received measurements indicative of the performance of the at least one light source 1 13 from the zero-cross detector 1 16 and/or the light source voltage monitoring unit 1 17, in order to control an ignitor unit 1 18 in the lighting unit 10.

According to yet another aspect of the method, the method further comprises the step of: displaying information on a display unit 17 in the continuous lighting unit 10 indicative of the performance of the at least one light source 1 13.

According to yet another aspect of the method, the method further comprises further comprising the step of: wirelessly receiving the control signals from a remote control unit 1 1 .

According to yet another aspect of the method, the method further comprises the step of: receiving the control signals manually on the continuous lighting unit 10. According to yet another aspect of the method, the method further comprises the step of: send control signals to the ballast or generator unit 1 1 1 through a cable device 1 10 and receiving a power signal from the ballast or generator unit 1 1 1 through the same cable device 1 10 in response to the control signals sent to the ballast or generator unit 1 1 1 .

According to a further aspect of the invention, a cable 1 10 is provided. The cable 1 10 comprising a first communication path 1 10A being arranged to transmit control signals to a ballast or generator unit 1 1 1 and a second communication path 1 10B being arranged to transmit a power signal from the ballast or generator unit 1 1 1 to a lighting unit 10.

According to one aspect of the cable, the control signals are DMX control signals and DMX logical power signals.

According to yet another aspect of the invention, a cable connector 1 10 is provided. The cable connector 1 10 is arranged to receive control signals to a ballast or generator unit 1 1 1 and transmit a power signal from the ballast or generator unit 1 1 1 .

According to one aspect of the cable connector 1 10, the control signals are DMX control signals and DMX logical power signals.

According to another aspect of the cable connector 1 10, the cable connector 1 10 comprises electrical pin connectors, wherein at least a first electrical pin connector is arranged to receive control signals to a ballast or generator unit 1 1 1 and at least a second electrical pin connector is arranged to transmitting a power signal from the ballast or generator unit 1 1 1 , the pin(s) of the at least second electrical pin connector being longer than the pin(s) of the first pin electrical connector.

According to yet another aspect of the invention, a ballast or generator 1 1 1 for providing a power signal to lighting unit 10 is provided. The ballast or generator 1 1 1 comprising a cable connector 1 10 as described above.

It should be noted that in addition to the exemplary embodiments of the invention shown in the accompanying drawings, the invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

Claims

1 . A reflector (6) for use in a lighting head (1 ) arranged to be detachably connected to the lighting head (1 ).

2. A reflector (6) according to claim 1 , comprising:

an aperture (9) for receiving a light source (7); and

fastening means (6B) arranged to be detachably connected to the lighting head (1 ) such that the light source (7) extends through the aperture (9) and at least a portion of the light from the light source (7) is reflected of a reflective surface (6A) of the reflector (6).

3. A reflector (6) according to claim 2, wherein the fastening means (6B) is arranged to be detachably mounted and secured by at least one fastening fixture (5) comprised in the lighting head (1 ).

4. A reflector (6) according to claim 3, wherein the fastening means comprise at least one protrusion or extension (6B) of the reflector (6) extending away from the opening of the reflector (6) located opposite the aperture (9), the at least one protrusion or extension (6B) of the reflector (6) being arranged to be received by a reception cavity (5B) of the at least one fastening fixture (5) comprised in the lighting head (1 ).

5. A fastening fixture (5) for a lighting head (1 ) arranged to detachably connect a reflector (6) to the lighting head (1 ).

6. A fastening fixture (5) according to claim 5, wherein the lighting head (1 ) comprises a reflector body (2) having a first reflector (4) with a first reflective surface (4A) and a first aperture (8) for receiving a light source (7), the fastening fixture (5) comprising a first receiving means (5A) for detachably connecting a lens (10) to the lighting head (1 ) in front of the light source (7), and wherein the fastening fixture (5) further comprising at least a second receiving means (5B) for detachably connecting a second reflector (6) to the lighting head (1 ).

7. A fastening fixture (4) according to claim 6, wherein the second receiving means (5B) is arranged such that the light source (7) extends through a second aperture (9) of the second reflector (6) for receiving the light source (7) and such that at least a portion of the light from the light source (7) is reflected of the reflective surface (6A) of the second reflector (6).

8. A fastening fixture (4) according to claim 6 or 7, wherein the first receiving means is a first reception cavity (5A) and the second receiving means is at least one second reception cavity (5B) for detachably connecting a second reflector (6) to the lighting head (1 ).

9. A fastening fixture (4) according to any one of the claims 5-8, comprising two or more second reception cavities (5B) for detachably connecting a reflector (6) to the lighting head (1 ).

10. A lighting head (1 ) being arranged to detachably connect a reflector (6) to the lighting head (1 ).

1 1 . A lighting head (1 ) according to claim 10, comprising a fastening fixture (4) for detachably connecting the reflector (6) to the lighting head (1 ).

12. A lighting head (1 ) according to claim 10 or 1 1 , comprising a reflector body (2) having a first reflector (4) with a first reflective surface (4A) and a first aperture (8) for receiving a light source (7) being arranged to detachably connect a second reflector (6) to the lighting head (1 ).