WO2012016895A1

WO2012016895A1 - Luminous device

Info

Publication number: WO2012016895A1
Application number: PCT/EP2011/062891
Authority: WO
Inventors: Thomas Rossmanith
Original assignee: Osram Ag
Priority date: 2010-08-03
Filing date: 2011-07-27
Publication date: 2012-02-09
Also published as: DE102010038828A1

Abstract

Proposed is a luminous device (209), comprising at least two lamps (206, 207, 208), wherein each lamp (206, 207, 208) has a drive unit (203, 204, 205), wherein at least two dimming states of a lamp (206, 207, 208) are settable using at least one of the drive units (203, 204, 205), comprising a control unit (202), by way of which different brightness levels of the luminous device (209) are settable via the dimming states of the lamps (206, 207, 208). Furthermore indicated is a method for operating the luminous device.

Description

description

lighting device

The invention relates to a lighting device and a method for controlling a lighting device.

In the case of high-pressure gas discharge lamps (HID lamps), it is disadvantageous that they can only be dimmed within a small range due to the design, ie. their

Brightness can only be reduced to about 50% of full brightness.

The object of the invention is to avoid this disadvantage z and in particular to provide a solution to the brightness using

High pressure gas discharge lamps can be adjusted (dimmed) in a wide range.

This object is achieved according to the features of the independent claims. Further developments of the invention will become apparent from the dependent claims.

To solve the problem is a lighting device

proposed

comprising at least two lamps, each lamp having a drive unit,

- By at least one of

Actuators at least two dimming conditions of a lamp are adjustable,

- comprising a control unit, by means of which

different brightnesses of the Luminaire via the dimming conditions of the lamps are adjustable.

In particular, each lamp has its own drive unit, which is provided for adjusting the brightness of this lamp. In particular, the dimming state is a brightness of the lamp which results from the lamp having a certain electrical energy or power

is operated. The dimming state is

by way of example by a proportion of the electrical power with respect to a maximum or nominal electrical power with which the lamp can be controlled. For example, a dimming condition of 50% indicates that the lamp is driven at half the maximum power or half the predetermined (e.g., efficient) operating power.

This results in a brightness of the lamp which is reduced by 100% compared with the dimming state. This consideration applies to the lighting device comprising a plurality of lamps

corresponding.

It should be noted that the drive units

In particular, allow a dimming condition of 100% for the respective lamps. In addition, at least one drive unit, preferably several

Drive units, at least one other dimming state (e.g., 75%, 50%, etc., for example, based on the maximum power of the lamp). The control unit can thus individually by adjusting the multiple drive units for each lamp

Brightness depending on the available dimming conditions and thus the brightness of the lighting device in predetermined levels (stepwise or continuously) set.

Preferably, the drive units each provide a plurality of dimming states provided by the control unit

are adjustable. In addition, it should be noted that each lamp on the

Control unit or the control unit can also be turned off. A development is that the lighting device is a lamp or a lighting system.

In principle, the lighting device can be any kind of luminaire or any luminous system

act. For example, the lamps and

Control units to be integrated in a lighting device or lamp. Also, as a lighting device

Arrangement may be provided by lamps, e.g. for object, facade, exterior or interior lighting. Thus, several lamps may e.g. be arranged in a shop window, the drive units can be carried out locally separated or integrated with the associated lamp. It is also possible that several drive units integrated, e.g. in the form of an electronic control gear, are arranged.

Another development is that a dimming state corresponding to a control of the lamp in a range of 40% to 100% of the maximum power of the lamp.

In the case of high-pressure gas discharge lamps, it is advantageous if a predefined low dimming state (for example 40%) is not undershot, because otherwise the function of the lamp is no longer guaranteed. However, the proposed solution for the lighting device allows dimming conditions significantly less than 50% of the maximum

Luminous efficiency of the lighting device. By using multiple (same or different sized) lamps a flexible setting of the brightness of the lighting device is possible within a wide range.

In particular, it is a further development that the lamps have the same or different maximum powers

exhibit . In particular, differently strong lamps can be used in the lighting device.

Also it is a training that the lamps

Discharge lamps, in particular gas discharge lamps, or high-pressure gas discharge lamps include.

In particular, other lamps may be provided, e.g. Incandescent lamps, semiconductor light elements, LEDs, etc. Also, any combination of different lamps can be used. In particular, lamps can

different shapes, colors or with different optics used and possibly combined. Furthermore, it is a development that the drive unit has a bridge circuit or an inverter for controlling the connected lamp.

In particular, via the drive unit exactly one

Lamp, e.g. a high pressure gas discharge lamp, driven.

As part of an additional training, the

Control unit, the control units so that

as many lamps in an energetically favorable

Condition to be operated.

For example, the energetically favorable state in high-pressure gas discharge lamps corresponds to a dimming state in the amount of 100%. This corresponds to a control of the lamp with essentially 100% of the maximum power or the specified operating power.

Thus, the control unit may set the drive units for the plurality of lamps so that as few lamps as possible are operated in a dimming state other than a dimming state of 100%. It should be noted that the "dimming state 100%" in this context Setting designated, which corresponds to an energetically favorable operation of the lamp. For example, this may be a dimming condition of approximately or nearly 100%.

If two lamps with a maximum power of 100W are provided, each providing a dimming condition of 50% (ie 50W each), then the

Lighting device (with the two lamps) in one

Dimming state of 50% (ie with 100W) can be operated by one of the lamps off and the other lamp is driven in the dimming state of 100%. This is more energy efficient than operating both lamps at 50W (in the dimming state of 50%) and thus providing the total power of 100W for the lighting device.

A next development is that the

Control unit is connectable to a bus system. In particular, the control unit can have an interface for the bus system. Thus, the

Lighting device can be controlled via the bus system,

For example, the brightness of the

Lighting device can be set or specified via the bus system.

One embodiment is that the control unit via a bus system with the AnSteuereinheiten the lamps

connected is.

Thus, the drive units may include an interface for the bus system and possibly be connected to the bus system together with the associated lamp. The

Control unit can e.g. as a control means of the

Bussystems the dimming conditions of the lamps over one

Corresponding addressing of the control units

to adjust . An alternative embodiment is that the bus system comprises a DALI bus system and / or a powerline bus system.

Another embodiment is that at least two lamps at least partially different maximum

Brightnesses and / or different maximum

Operating services.

Thus, two (or even more) of the lamps can have different maximum brightness levels

exhibit .

It is also an embodiment that the at least two lamps have at least partially different dimming states.

Accordingly, two of the several lamps can each

different dimming states (100%, 75%, 50%), e.g. also have different levels of dimming.

The above object is also achieved by a method for controlling a lighting device,

- Wherein the lighting device has at least two lamps, each lamp of a

Control unit is controlled,

- By at least one of

Actuators at least two dimming conditions of a lamp are adjustable,

- in which different brightnesses of

Lighting device can be adjusted via the dimming conditions of the lamps.

One embodiment is that the dimming conditions lamps are set or changed continuously or stepwise. In particular, the dimming conditions of the lamps and thus the brightness of the lighting device can be changed continuously or abruptly or abruptly.

Embodiments of the invention are illustrated and explained below with reference to the drawings.

Show it:

Fig.l diagrams, each a temporal course

a power, with which two lamps are operated, as well as an overall course of a performance of a lamp comprising these two lamps represent;

A schematic arrangement of a lamp with three

HID lamps, each of its own

Control unit can be set, the

Control units are set by a control unit;

Figure 3 diagrams, each a temporal course

a power, with which three lamps are operated, as well as an overall course of a performance of a lamp comprising these three lamps

group;

4 shows an exemplary block diagram with components for controlling a gas discharge lamp.

A lamp, in particular a high-pressure gas discharge lamp (also referred to here as HID lamp), is controlled by means of its own drive unit, comprising, for example, an inverter or a bridge circuit. Fig. Shows an exemplary block diagram with

Components for controlling a gas discharge lamp 407. A power grid is connected via a line filter 401 with a

Rectifier 402, which is connected via a unit for power factor correction (PFC) 403 with a buck 404 and further with an inverter 405. The inverter 405 is connected to the gas discharge lamp 407 via an ignition stage 406. The components 401 to 406 can

for example, be part of an electronic control gear.

Furthermore, the electronic control gear a

Interface 408 to a bus system (e.g., a DALI bus system) connected to a controller 409, wherein the controller 409, for example, the buck 404, the inverter 405 and / or the ignition stage 406 drives.

The line filter 401 increases the noise immunity and the

Overvoltage protection. The rectifier 402 converts the mains voltage into a (possibly pulsating) DC voltage. The power factor correction unit 403 decreases

line-bound emissions (Net zoberschwingungen) and pursues, for example, the goal of a substantially sinusoidal mains current consumption without phase angle. The buck converter 404 sets the through the unit to

Power factor correction 403 high voltage down to a level of lamp voltage and provides a stable

Lamp voltage ready. The inverter 405 makes out of the

DC an alternating current with a frequency suitable for the lamp (e.g., 160 Hz). The ignition stage 406 provides ignition pulses for the lamp 407 accordingly.

In particular, an operating device (electronic

Ballast) may be provided, the more

Having drive units and thus can be used to control multiple HID lamps. It is proposed that each drive unit be separately set for each HID lamp, so that a brightness (or a dimming state) of each of the plurality of HID lamps results due to this driving. Also, individual or all HID lamps can be switched off. Thus, it is possible that several HID lamps are set separately from each other and to a

Total brightness of a lighting device, e.g. one

Light or a lighting system, contribute. Thus, the brightness of the lighting device by means of several HID lamps, for example, in stages or continuously adjustable; Thus, by the use of HID lamps, which are not individually operable, for example, not less than 50% of their maximum power, for the lighting device

Brightness states (dimming conditions) can be set below 50% of the total output of the lighting device.

In particular, it is possible for the individual lamps to have different numbers of dimming states (in steps or steplessly) and / or for the individual HID lamps

have different maximum powers.

Thus, HID lamps can be used in additional applications. Furthermore, a power-saving

Operation is possible if only a (small) part of the maximum brightness of the lighting device comprising the multiple HID lamps is needed.

Fig.l shows several diagrams, comprising

a time course 101 of a power with which a first lamp is operated,

a time course 102 of a power with which a second lamp is operated,

- An overall time course 103 of a power of a lamp comprising the two lamps, said overall course 103 illustrates the emitted brightness of the lamp. Both lamps are part of the lamp and are each powered by its own drive unit with electrical energy. The drive units for the lamps can be adjusted by means of a control unit, for example, depending on a brightness request of a user.

Due to the courses 101, 102 of the power to the lamps gives the overall course 103 of the power of the lamp.

At a time TO, both lamps are connected to one

Power of 100W operated, the light consumes 200W and emits corresponding to light with maximum

Brightness.

From a time T1 to a time T2, the first lamp (see trace 101) is dimmed to 50% of its power, i. from the time T2, the first lamp only needs a power of 50W. Accordingly, in the overall process 103, the power of the luminaire decreases from 200W to 150W. It follows that the light with

reduced brightness is operated.

From a time T3 to a time T4, the second lamp (see curve 102) is reduced (dimmed) to 50% of its power, wherein the second lamp is switched off at the time T4 and the first lamp is switched off to 100% of its power (see courses 101 , 102).

Thus, the power of the lamp is reduced in total from 150W to 100W, from the time T4 the lamp emits a 100W corresponding (compared to the previous one

Time T3) dimmed light.

From a time T5 to a time T6, the first lamp is dimmed to 50% of its power, from

Time T6 thus results for the overall course 103, a power of the lamp in the amount of 50W. Thus, it is possible that two different brightness or dimming conditions (corresponding to the power levels 25%, 50%, 75%, and...) For the luminaire are provided by means of two lamps, which here each have a single dimming state (50% of the maximum power) 100%). Accordingly, more than two dimming states per lamp can be realized and / or more than two separately controlled lamps can be provided.

As stated above, at time T4, the second lamp is turned off to achieve better efficiency. Accordingly, it is also possible to turn off the first lamp and set the second lamp to 100W power.

2 shows an exemplary arrangement of a lamp 209 comprising three HID lamps 206 to 208, which are each driven by a separate drive unit 203 to 205. The drive units 203 to 205 can also be combined in one operating device. Furthermore, the drive units 203 to 205 are set by a control unit 202, preferably as a function of one

predetermined dimming 201. The dimming 201, so the

Adjustment of a (full or reduced) brightness of the luminaire 209 may e.g. from a user over

Input means or else automatically e.g. depending on a time or ambient brightness. Furthermore, the dimming via a bus system

transmitted or provided.

In FIG. 2, three HID lamps 206 to 208 are shown by way of example. Accordingly, at least two lamps

be provided, of which at least one lamp has at least two dimming conditions. In particular, the lamps can have different maximum brightnesses

so that when combining several lamps for the Overall, a variety of different graded brightness settings (Dimmzustände or dimming levels) are possible. In addition to the above, it should be noted that the control unit 302 and / or the HID lamp with

Drive unit can be coupled to a bus system. For example, this may be a DALI bus (Digital Addressable Lighting Interface) or a bus system of a power supply (Powerline). Thus, it is possible that a variety of lamps with

associated control unit and possibly (integrated)

Bus interface to be connected to the bus system. The control unit can be a variety of such

Control lamp components and in the composite brightness for a plurality of such lamp components of a

Specify lighting system.

Correspondingly, a luminaire according to the representation of FIG. 2 can also be connected to the bus system via the control unit 202, wherein the control unit 202 can communicate with a control entity of the bus system as a whole. Thus, it is possible for the luminaire of Fig. 2 to respond to a brightness control signal communicated from the bus system of the control unit 202 (in this case, the dimming 201 corresponds, for example, to such a control signal from the bus system).

3 shows several diagrams comprising

a time course 301 of a power with which a first lamp is operated,

a time course 302 of a power with which a second lamp is operated,

a time course 303 of a power with which a third lamp is operated,

- An overall time course 304 of a power of a lamp comprising the three lamps, wherein this overall course 304 illustrates the emitted brightness of the luminaire.

By way of example, the first lamp has three dimming states 100%, 75% and 50% of the maximum power of 100W. The second lamp also has three dimming states 100%, 75% and 50% at a maximum power of 50W. The third lamp has two dimming states 100% and 50% and has a maximum power of 25W.

Furthermore, all lamps can be switched off individually (the

turned off state of the lamp is not referred to here as a dimming state). From a time TO to a time Tl, all three lamps are operated at maximum brightness (100%), the lamp consumes 175W and illuminates with maximum brightness. From a time Tl to a time T2, the power of the first lamp is reduced from 100W to 50W, and from time T2 to time T3, the power of the second lamp is reduced from 50W to 25W.

Accordingly, the luminaire is operated from the time T3 with 100W and lit with reduced brightness. It should be noted that at the time T3 for

Increasing the efficiency of the first lamp switched to 75% and the second lamp is turned off. This takes into account the fact that it is energetically beneficial

operate as few lamps in a dimming condition less than 100%.

From a time T4 to a time T5, the first lamp is set from 75W to 50W, from the time T5 to a time T6, the third lamp is controlled from 25W to 12, 5W, so it results for the lamp between the times T4 to T6 a power reduction from 100W to 62, 5W. With this reduced power or brightness, the lamp is operated until a time T7. From time T7 to time T8, the second lamp is set from 50W to 37.5W (75% dimming). When the time T8 is reached, the third lamp is switched off and at the same time the second lamp is set to 50W again. This ensures that at the time T8 only the second lamp is active and the lamp up to a time T9 with 50W and a corresponding

Brightness is operated.

From time T9 to time T10, the second lamp is set from 50W to 25W (50% dimming). When the time T10 reaches the second lamp

switched off and the third lamp is operated with the maximum power of 25W. Thus, the light emits light with 25W and a corresponding brightness from the time T10.

Thus, the three lamps as part of the luminaire allow the luminaire to have different dimming conditions. Some dim states are shown by way of example in FIG. 3 and explained above. Other combinations of

Dimming conditions of the lamps are correspondingly through

Setting the control units assigned to the lamps adjustable. Thus, it is advantageous that the lamp comprising the plurality of lamps can also be operated with a power well below 50% of the total power and accordingly also low brightnesses are adjustable.

Claims

claims

Lighting device (209)

- comprising at least two lamps (206, 207, 208), each lamp (206, 207, 208) having a

Drive unit (203, 204, 205),

- By at least one of

Drive units (203, 204, 205) at least two dimming states of a lamp (206, 207, 208)

are adjustable,

- comprising a control unit (202), based on which different brightness levels of the lighting device (209) on the dimming conditions of the lamps (206, 207, 208) are adjustable.

Lighting device according to claim 1, wherein the

Lighting device is a lamp or a lighting system.

Lighting device according to one of the preceding

Claims in which a dimming state corresponds to driving the lamp in a range of 40% to 100% of the maximum power of the lamp.

Lighting device according to one of the preceding

Claims in which the lamps are the same or

have different maximum powers.

Lighting device according to one of the preceding

Claims in which the lamps discharge lamps, in particular gas discharge lamps, or

High pressure gas discharge lamps include.

Lighting device according to one of the preceding

Claims in which the drive unit a

Bridge circuit or an inverter (405) to control the connected lamp.

7. Lighting device according to one of the preceding

Claims in which the control unit is the

Control units are set so that as many lamps in an energetically favorable state

operate.

Lighting device according to one of the preceding

Claims, in which the control unit with a

Bus system is connectable.

Lighting device according to one of claims 1 to 7, wherein the control unit is connected via a bus system with the drive units of the lamps.

10. Lighting device according to one of claims 8 or 9, wherein the bus system comprises a DALI bus system and / or a powerline bus system.

Lighting device according to one of the preceding

Claims in which at least two lamps have at least partially different maximum brightnesses and / or different maximum operating powers.

Lighting device according to one of the preceding

Claims in which the at least two lamps

have at least partially different Dimmzustände.

Method for controlling a lighting device,

- wherein the lighting device comprises at least two lamps, each lamp of a

Control unit is controlled,

- By at least one of

Actuators at least two dimming conditions of a lamp are adjustable, - in which different brightnesses of

Lighting device can be adjusted via the dimming conditions of the lamps.

A method according to claim 13, wherein the dimming states of the lamps are adjusted or varied steplessly or stepwise.