WO2016087492A1

WO2016087492A1 - Flashing alarm light for an alarm system comprising a thin film component consisting of organic semiconducting materials and producing planar illumination (oled)

Info

Publication number: WO2016087492A1
Application number: PCT/EP2015/078308
Authority: WO
Inventors: Harald Ebner; Hilmar Konrad
Original assignee: Siemens Schweiz Ag
Priority date: 2014-12-02
Filing date: 2015-12-02
Publication date: 2016-06-09
Also published as: EP3227872B1; EP3227872A1

Abstract

The invention relates to a flashing alarm light (1) for an alarm system (10), said flashing alarm light comprising: a flashing light source (2) for an optical warning in the event of a hazard; an energy store (3) for storing electrical energy (E); a switching element (4); and a control unit (5) for releasing the stored electrical energy via the switching element to the flashing light source. The flashing alarm light further comprises a housing (9) which has a fastening surface (BF) on the housing side for direct wall or ceiling mounting or for fastening to a base (SO) for indirect wall or ceiling mounting. According to the invention, the flashing light source is a thin film component consisting of organic semiconducting materials and producing planar illumination (OLED). In particular, the thin film component is attached to the housing. The thin film component has an inner surface (IF) facing the housing and a lighting surface (LF) that is directed away from the housing and outwardly arched. The lighting surface comprises e.g. a portion of the surface of a sphere, cylinder or ellipsoid. By means of appropriate shaping of the curvature, it is possible to adapt the radiation characteristics of the thin film component producing planar illumination to the European Standard EN 54-23 or the North American Standard UL 1971 v3.

Description

description

Alarm flashing light for a hazard alarm system with a surface-illuminating thin-film component made of organic semiconducting materials (OLED)

The invention relates to an alarm flashing light for a danger ^¬ renmeldeanlage. The alarm flash has a flash ^¬ source for visual alarm in case of danger, an energy storage device for storing electrical energy, a switching element and a control unit for releasing the stored electrical energy from the energy storage via the switching element to the flash light source. It also comprises a housing with a housing-side, preferably flat mounting surface for direct wall or ceiling mounting or preferably releasable attachment to a base for indirect wall or ceiling mounting. The light emitted from the flash light source light is visible to the human eye ^¬ Liche.

Furthermore, the invention relates to a (first) hazard detection ^¬ system comprising a hazard warning center, a is connected thereto ^¬ detector line and a plurality of at Melderli ^¬ never attached such Flashing alarms. It also relates to a (second) alarm system with egg ^¬ ner radio-assisted security control panel and with a ^Mehr¬ number via radio at the security panel announced such alarm beacon lights. Alarm flashlights of the type described are often used in combination with an acoustic alarm, wherein such combined acoustic / optical alarms as "Sounder beacon", or in German "Blitzsummer" are called. Such alarm flashing lights or acoustic / optical alarms are preferably mounted on the wall or on the ceiling. Furthermore, combinations of a smoke detector or gas detector with an alarm strobe are known. Known alarm strobe lights typically include a xenon flash tube. The pulse duration of the xenon flash is in a range of 0.5 to 1 ms. The short flash is well perceived by hearing impaired persons who do not or hardly hear the parallel emitted audible alarm signal.

As an alternative, LED alarm flashers are now offered. The light-emitting diodes (LED) used for generating light comprise a semiconductor crystal with semiconducting light-emitting materials. Although the typical

Pulse durations (about 100 ms) in the normalized frame (up to 200 ms), the generated LED flash is significantly less noticeable compared to the xenon flash. This is especially the case when the LED flash arrives at the eye of a person through reflections on walls or ceilings and thus as indirect light, ie viewed from the person's side or from behind.

In order to achieve the same quality of visual perception as in egg ^¬ nem xenon flash, the pulse duration of an LED flash should be maximum in the range of 10 to 20 ms. However, a much higher light intensity of the LED flash is required to produce the same light energy per flash. The corresponding required elec ^¬ tric peak power is 100 W and more!

This is currently difficult to achieve with a single high performance or power LED, aside from the high cost of the special high power LED and the high current driving electronics required. It is therefore usually several LEDs arranged in series or in an array. The ge ^¬ entire optically active surface of all LEDs is in the range of about 1 to 5 cm ² . It is erfor ^¬ sary also a special appearance as to achieve, for example, with lenses or mirrors, optimized to the respective national standard or to a respective regional standard light emission. Such a standard is, for example, the North American standard UL 1971 v3 or Europeanized ^¬ Standard EN 54-23. Based on the above-mentioned prior art, it is an object of the invention to provide an improved alarm strobe light. These objects are achieved by the subject-matter of the independent claims. Advantageous embodiments of the invention are described in the dependent claims.

According to the invention, the flash light source is a surface-illuminating thin-film component made of organic semiconductive materials (OLED for Organic Light Emitting Diode).

Such a surface-illuminating thin-film component he ^¬ leaves due to its manufacturing principle, a largely free shaping. Thereby an adjustment of the light emission to a required radiation characteristic is advantageously possible, typically based on a standard or Stan ^¬ standards. The free shaping is achieved by applying semiconductive organic light-emitting luminous color substances on a transparent flexible carrier layer, such as on a plastic film. The luminescent dyes may alternatively or additionally be applied to a preformed transparent (flexurally) stiff and not necessarily planar support layer, such as on a transparent semi-hollow spherical mold made of plastic or glass. The pre-formed ^¬ carrier layer may in principle have any geometry ^¬ surfaces, such as curved, spherical, cylindrical and the like. The arealuminous thin-film component is then preferably snapped on the housing, framed or glued.

Conventional LEDs contrast, have a brittle, brittle semiconductor crystal on with semiconducting inorganic lichtemit ^¬ animal materials. Manufacturing technology, they come from a flat wafer, which typically has hundreds of such LEDs. They are therefore also plan. The core of the invention is further in the knowledge that the previously unsatisfactory solved problem in the aging of such "OLEDs" here in the present invention is irrelevant, since such an OLED as an alarm flash only in very rare alarming traps and thus for a short operating time is operated.

By contrast, OLEDs are subject during operation as dauerhaf ^¬ tes lighting means or as a display for televisions, computers or monitors tablet computers known to be a permanent aging with a significant decrease in brightness over time.

Another advantage is that the well-known of power LEDs ago "efficiency droop" in an inventive sur fa ^¬ chigleuchtenden thin film device due to its in Ver ^¬ very large light ^¬ surface is significantly reduced equal to the luminous area of the power LEDs. It is therefore not required driven in un ^¬ economic threshold electric operating advertising to in order to generate sufficient light output. with "efficiency droop" the technical effect is called, in which the light output as well as the lifetime decrease with increasing operating current. In other words, an LED is more economical the less light it emits. A manufacturer-specified maximum operating current is therefore a compromise between a required service life and a resulting minimum luminous flux of a

Led . Another advantage lies in the possible realization of alarm flashing lights with a particularly low overall height. As a result, an optically inconspicuous integration in the ceiling or wall area or even behind semi-transparent mirrors is possible. The entire control and monitoring electronics can, for example, "disappear" in-wall, making it possible to realize "invisible" integrated and moisture-proof solutions, especially in wet areas in hotel rooms. Another advantage is that the comparatively large luminous area of such a surface-illuminating thin-film component only leads to low glare compared to a power LED with its extremely high luminance in the main emission direction with several 100,000 cd / m 2. Alarm flashlights with power LEDs having such high local luminance levels may fall into a laser protection class, such as class 2M or 3R, which prohibits operation of such alarm flashers. Correspondingly complicated approval procedures are disadvantageously necessary in such a case. The laser protection classes are specified for Europe in the European standard EN 60825-1.

According to the invention, the arealuminous thin-film component made of organic semiconducting materials has, in particular, no inorganic light-emitting materials. Preferably, the arealuminous Dünnschichtbau ^¬ element has a luminous surface with an area in the range of 10 cm ² to 200 cm ² , in particular from 50 cm ² to 150 cm ² .

According to a preferred embodiment, the arealuminous thin-film component is attached to the housing. It comprises an inner surface opposite the housing and a luminous surface directed away from the housing and protruding outwards.

In particular, the outwardly projecting luminous surface is a curved luminous surface. It preferably is part of the Oberflä ^¬ surface of a sphere, a cylinder, a cone, a soids ellipsoid, a paraboloid or a hyperboloid.

As a result, an advantageously improved emission in the lateral direction is possible in comparison with a planar area radiator, ie, a so-called Lambertian radiator, as is the case with a conventional LED without upstream optics (see FIG. 6, characteristic curve LAM) (see FIG. 6, curves ELL, SEMI). An upstream optical lens or mirror is not required. The outwardly arched luminous surface creates a cavity which can be advantageously used to accommodate components of the inventive alarm flash, such as the energy storage and / or circuit substrate.

Includes, in particular arched or Leuchtflä ^¬ surface describes part of the surface of a sphere, a cylinder, a cone, a biaxial or triaxial particular ellipsoid, a paraboloid or a hyperboloid. In the aforementioned FIG 6 refer to the Abstrahlkennlinien of a flat luminous thin film component with halbkugeli ^¬ ger luminous surface are (characteristic SEMI) and a surface ^¬ luminous thin film device having a light emitting surface comprising the surface of a biaxial half-ellipsoid (characteristic ELL) is illustrated. It can be seen that the lateral emission area of the respective luminous thin film component, that is more significantly improved parallel to the plane of the alarm day Mon ^¬ strobe light out opposite a flat antenna in directions.

Above all, the arealuminous thin-film component has a uniform luminance on the luminous surface. The curvature of the surface-emitting thin-film component is such that the organic light-emitting diode conforms to the European standard EN 54-23 or one to the North American

Standard UL 1971 v3 has approximate emission characteristics.

By "approximated radiation characteristic" it is meant here that the shaping of the curvature can be determined in such a way that substantially a radiation according to the UL standard or the EN standard can be achieved without further optics optical simulation carried out. by "substantially" is meant that the deviation a thus determined characteristic for the exhaust emission characteristic of the surface luminous thin film component of a required normalized Abstrahlkennlinie, such as preferential ^¬ example according to the UL 1971 v3, a maximum of 20 percent, a maximum of 10 Percent, is (see FIG 6), in addition the specific characteristic satisfies the respective standard requirements. For this purpose, the areas under the respective two characteristic curves are determined and compared with each other. According to an alternative to the preceding embodiments embodiment, the surface luminous Dünnschichtbau ^¬ element is a flat planar luminous, ie bright ansteu ^¬ erbares component. Such a device can be produced in a particularly simple manner.

In the simplest case, a planar transparent plastic ^¬ foil or plastic plate is provided with the semiconducting organic luminescent dyes, at least form such as by means of an inkjet printing method or offset printing, said light-emitting dyes a part of an emitter layer for light emission. Typically, the plastic film or the plastic plate is previously ver ^¬ see with a transparent anode layer and then followed Lochleitungsschicht. After applying the luminescent dyes, a cathode layer is finally applied.

A product prepared in this manner and controllable luminous thin film device can be subsequently incorporated as planes Bauele ^¬ ment on the housing of the alarm flashing light.

Alternatively, this device may be shaped after its manufacture, such as e.g. by bending to a cylindrical shape, or by thermoplastic deformation to an ellipsoidal, spherical, conical, paraboloidal or hyperboloidal shape, as described above.

In the case of a flat surface-illuminating Dünnschichtbauele ^¬ ment is the pre-circuit of an optical lens for scattering and / or the spatial Aufweis the emitted light required to meet the standards.

Irrespective of this, ie even with a curved illuminated surface, the surface-illuminating thin-film component can be opti- see lens, such as a Fresnel lens, or a mirror upstream to direct emitted light in more lateral directions. According to another embodiment, the areal illuminating thin-film component is designed to emit flash light having a substantially uniform luminance in the range from 10,000 cd / m ² to 200,000 cd / m ² , in particular from 25,000 cd / m ² to 100,000 cd / m ² .

The flat luminous thin film component typically has ^¬, on a carrier, anode, hole conduction, the emitter and Ka ^¬ Thode layer. The emitter layer has a concentra ^¬ on of fluorescent dyes that emit at least when electrically energized light in the optically visible range. By a suitable choice of mono-, di- or multicolor organic fluorescent dyes, a desired color can then be emitted upon electrical excitation. The colors can be eg "white" red, green, yellow, blue or. For white light is typically a mixture of red, green and blue fluorescent dyes ^¬ glowing required.

Preferably, on either the electrically conductive cathode ^¬ layer or the electrically conductive anode layer, a mirror-terrain, preferably metallic layer, so that the light emitted from the emitter layer to their light is reflected towards the anode or cathode layer. The anode ^¬ or cathode layer, however, is transparent to light extraction. It has, for example, a transparent plastic layer with a transparent, electrically conductive layer, for example, of indium tin oxide.

In accordance with a further embodiment, the emitter layer has a concentration of fluorescent dyes which is dependent on the position on the luminous area and thus a local luminance dependent thereon. As a result, positions, such as on a hemispherical luminous surface shape of the surface-illuminating thin-film component, can be raised or lowered in a luminous manner in accordance with the desired emission direction. The corresponding local electrical power is advantageously proportional to the desired local luminance, since the local electrical power is approximately proportional to the local current flowing there for the light excitation. The local-dependent concentration can be considered for example in the printing process of the support layer by a lo ^¬ cal place for example once, twice or is printed multiple times or by more or less local bodies remain unprinted. The local luminance is approximately proportional to the local concentration of one or more luminescent dyes. At the same time, the local luminance is also approximately proportional to the current flowing locally there between the anode and cathode for the local excitation of light fluorescent dyes. The emitter layer preferably has another one

Embodiment such a dependent on the position local luminance, that the surface-illuminating Dünnschichtbau ^¬ element has a to European Standard EN 54-23 or to the North American standard UL 1971 v3 approximated radiation characteristic.

The according to standard requirement usually in many radiation directions too high and therefore unnecessary Lichtabstrahlleistungen and thus the unnecessary electrical power are advantageously avoided.

According to an advantageous embodiment, the cathode layer of the thin-film component has two to four partial cathodes arranged electrically from one another and in particular adjacent to one another. Alternatively, the anode layer two to four electrically from each other and in particular adjacently arrange ^¬ th partial anodes. The partial cathodes or the partial anodes are for electrical excitation via an associated switching element connected to the control unit, so that upon activation of a switching element, a respective associated emitter ^¬ partial layer emits light as a partial light area. In terms of area, the sum of the partial cathode areas or the sum of the partial anode areas corresponds at least almost to the total area of the cathode layer or anode layer. In other words, the cathode layer or the anode layer is divided into two to four partial cathodes or partial anodes. Preferably, the two to four emitter sublayers then emit the same colored light, such as white or red light upon electrical excitation.

As a result, advantageously different partial areas of the luminous area can be activated. Optionally, unnecessary for a particular application, part ^¬ luminous surfaces in alarm case remain dark by these are at least indirectly electrically excited via the control unit of the alarm strobe light.

According to one embodiment, the respective emitter partial layers have different concentrations of red, green or blue illuminating fluorescent dyes for the emission of colored or white light. As a result, different luminous colors can be set, eg red, white, yellow or green. The color "white" or "red" can be set, for example for the op ^¬ tables alarm. The color "yellow" or "green" example to the purposes for signaling the end of a reported risk of "clearance" can be set. The color "white" can be used for emergency purposes is ^¬ provides. The selective adjustment preferably takes place at least indirectly via the control unit of the alarm flash lamp. According to one embodiment, the alarm flash lamp on a directed away from the housing, outwardly projecting, in particular outwardly curved luminous surface. The emitter sublayers are spatially distributed on the illuminated area in this way. assigns that when electrical control of the respective Emitterteilschicht a directed light emission in preference ^¬ wise different directions can be achieved. As a result, direction-dependent light radiation is advantageously possible. For example, an outwardly curved luminous surface of the alarm flash lamp (see example of FIG. 2 and FIG. 3) can be designed in two parts (see FIG. 13). This can be advantageous in ceiling mounting such

Alarm flashlight both illuminated surfaces are triggered for light emission. In contrast, only the lower light-emitting surface for light emission can be angesteu ^¬ ert ^¬ advantageous way with a wall mounting. This reduces the power consumption in the case of wall mounting, as the upper illuminated area is not needed for the optical alarm. The corresponding dently ^¬ tion for the respective mounting is preferably carried out at ^¬ least indirectly via the control unit the alarm flashing light. According to a particularly advantageous embodiment, the alarm flashing light on a receiving unit for receiving an ers ^¬ th control signal or control command for the control unit. The control unit is configured to ^actuate the flat-emitting thin-film component 2 with a brightness, flash duration, repetition frequency and / or light color determined by the first control signal or by a first control command.

The first control signal may be, for example, an analog signal. It can be a frequency signal, which spectrally has several adjacent individual frequencies. The presence ^¬ his single or multiple individual frequencies can then encode the desired brightness, flash duration, repetition frequency and / or the light color.

The first command may, for example, a bit sequence represents my ^¬ reindeer, wherein a respective group of bits different values for the brightness, for the flash duration, for the Wiederholfre ^¬ frequency and coded for the light color.

According to a further embodiment, the surface-illuminating thin-film component is a white-luminescent or white-light-triggering thin-film component. The receiving ^¬ unit is set up to receive a second control signal or control command. The control unit is to be directed ^¬ to drive at a reception of a second control signal or control command, the surface luminous thin film device with a continuous light having a reduced luminance of at most 4,000 cd / m ^2, in particular of a maximum of 2000 cd / m ^2, for an emergency lighting. The brightness of the emergency lighting can be done by providing a reduced compared to lightning emergency ^¬ current. This is in comparison to the maximum current during flashing in Alarmierungsfall only ei ^¬ nen fraction thereof. Alternatively, can be extremely briefly controlled with maximum flash current and even with ei ^¬ ner repetition rate of more than 24 Hz to reduce the bright- ness of the surface luminous thin film component of this. The ratio of flash duration to flash duration and flash break then determines the resulting and flicker-free perceived brightness.

The object of the invention is also achieved with a (first) alarm system having a hazard alarm center, ei ^¬ ne connected thereto detector line and a plurality of connected to the detector line according to the invention alarm flashing lights. The alarm flash lights each have a receiving unit for receiving electrical energy and / or control commands from the detector line. Such a plant is by the inventive USAGE ^¬ dung of a surface luminous thin film component or from ^¬ ganischen semiconducting materials, with its many advantages over power LEDs as the optical Richtwir- kung, the creative freedom in the design and the elimination of optical means such as lenses and mirrors flexible use. The connection unit is set up to receive control signals or control commands for the control unit. Alternatively or additionally, it is set up to receive electrical energy for the energy store from the detector line. The connection unit is preferably set up to connect a two-wire line. Such two-wire lines are typically used as detector lines in hazard detection systems. The connection unit usually has a connection terminal. The object of the invention is also with a

(second) alarm system solved, which has a radio-supported security control panel and a plurality of notified by radio at the hazard warning center according to the invention alarm flash lights. The alarm flashing lights each have a battery and / or accumulator for supplying electrical energy to the alarm flashing light and a radio receiving unit for receiving control commands from the radio-supported security control panel. In this embodiment, the alarm strobe has a radio interface as a receiving unit. The radio interface ^¬ is set up for at least indirect radio reception of control signals or control commands for the control unit of the danger warning center. By "at least indirectly" is meant that the control signals or the control commands not only directly but also indirectly via other funkge ^¬ supported participants of the danger detection system in terms of a meshed network or a multihop network from a radio-supported security panel to the addressed

Alarm flasher be transmitted. The other funkge ^¬ assisted participants can be eg conventional alarm flashing lights or inventive alarm flashing lights. The invention and advantageous embodiments of the present invention can be seen by the example of the following figures. In the drawings FIG 1 is a hazard detection system having a control center and three on a common detector line is castle ^¬ NEN inventive alarm flashing lights,

2 shows a first embodiment of the inventive

Alarm flash lamp in ceiling mount with a sur fa ^¬ chigleuchtenden thin film device of organic ^¬ rule semiconductive materials having an outwardly curved hemispherical light emitting surface, FIG 3 shows a second embodiment in ceiling mount with a flat luminous thin film device with the surface of a biaxial half-ellipsoid soids broad luminous surface, FIG 4 a third embodiment in ceiling mounting with a thin-film component having a Oberflä ^¬ surface of a truncated cone comprising luminous surface,

5 shows a fourth embodiment in wall mounting with a surface-illuminating thin-film component with a light surface comprising a part of the surface of a pointed cone,

Characteristic curves for the emission characteristic of an alarm flashing light according to the standard UL 1971 v3 in comparison with that of a Lambertian radiator and with those of the areal illuminating thin-film components according to FIG. 2 and FIG.

7 shows a fifth embodiment of the alarm flash lamp in ceiling mounting with a flat surface planar thin-film component, a sixth embodiment in ceiling mounting with a surface-illuminating flat thin-film component and with an upstream diffusing screen, a seventh embodiment in wall mounting with ei ^¬ nem planar illuminating flat thin film device and with an upstream diffusing lens, the layer structure of a surface-illuminating thin-film device with curved luminous surface with example two separately controllable emitter ^¬ partial layers to emit white light in different directions, the layer structure of a flat luminous thin film component with curved light emitting surface having for example two drivable separately emitter ^¬ partial layers to emit red or white light in different directions, the example of Figure 3 with a for Umlaufwin- kel to the symmetry axis is the same, but dependent on the vertical angle, the concentration of fluorescent dyes in an emitter layer according to the invention, an eighth Embodiment in wall mounting, with egg nem surface luminous thin film device with a part of the surface of a biaxial ellipsoid broad luminous surface and a dependent vertical and horizontal angle about the Symmet ^¬ rieachse concentration of fluorescent dyes in the emitter layer, a ninth embodiment of the inventive alarm strobe light in wall mounting and with a egg ^¬ nen part of the lateral surface of a cylinder ^¬ include the luminous surface. 1 shows a hazard alarm system 10 with a central 11 and with three connected via a common detector line ML s ^¬ senen alarm beacons 1. In the left and middle part of FIG 1, two inventive alarm flashlights 1 are shown, which are configured for example only visual alerting , You can additionally have an acoustic alarm unit for ge ^¬ common alarm in case of danger. In the right part of an inventive alarm beacon 1 is seen, which is also still designed as a smoke detector 7 and has a detector unit 8 for smoke detection. All ge ^¬ showed alarming units 1 are supplied via the detector line ML with electrical energy E, so electric current which is provided by the center 11 and the case of power failure of the power supply network by Net ^¬ zersatz such as will ensure by emergency power batteries.

The alarm flash lamps shown have 1 according to the inventions dung surface luminous thin film device of organic ^¬ rule semiconducting materials OLED as a flash light source 2 for visual alarm in case of danger on. The alarm flash ^¬ light 1 also includes an energy storage 3 for storing electrical energy E, a switching element 4 and a control unit 5 for releasing the stored electric ^¬ 's energy E from the energy storage device 3 via the switching element

4 to the surface-emitting thin-film component 2.

Furthermore, the alarm strobes 1 have been additionally a wired connection unit 6 which E is set for the alarm lamp flash for 1 Auskopp ^¬ development of electrical energy E of the detector line ML and supplying the electric power. The connection unit 6, such as a bus module, is also set up for the

Alarm flashlight 1 certain, control commands IN, NOT forward to the control unit 5 or from the control unit

5 output alarm message AL to the detector line ML ^¬ . The reception of the control commands IN, NOT takes preferably addressed to the respective alarm flash light 1, as well as the output of an alarm message AL from a smoke detector 7 to the center 11. Such an alarm message AL can then be further processed by the center 11 further. At the same time the FIG 1, the alarm message is generated by the smoke alarms ^¬ 7 and the output AL also used for the control of the surface luminous thin film component 2 to the optical alarm in the example.

The control unit 5 is preferably a microcontroller on which a suitable computer program is executed. Alterna tively ^¬ the connection unit 6 can be a radio interface, for example be on WLAN or Bluetooth-based communication with a radio-based hazard warning center. 11

The energy store 3 is preferably a capacitor which is suitable for ^providing high peak currents for the very short flash times. In the event that the alarm strobe is radio-supported 1 and is not supplied via the alarm line ML continuously with energy E, this egg ^¬ ne battery or an accumulator can have. The switching element 4 is preferably a power switching transistor such as an FET. In the simplest case, the switching element 4 is in Alarmierungsfall by the control unit 5 with a repayment ^¬ frequency in the range of 1 Hz to 2 Hz and for a period of time in the range of 0.5 ms to 20 ms for switching through the energy stored in the energy storage 4 E. activated to the arealuminous thin-film component 2. Depending on the technical design of the alarm flash lamp 1, the respective control unit 5 can be set up to control the thin-film component 2 with a brightness, flash duration, repetition frequency and / or light color determined by a first control command IN. In the simplest case, the first control signal or the first Steuerbe ^¬ lack IN represents an alarm message on the basis of which the castle be ^¬ NEN Flashing alarms 1 drive the flat luminous thin film device 2 flashing. The control unit 5 may further be set based on a second control command NOT to drive the flächigleuch ^¬ tend thin film device 2 with continuous light for a notbe ^¬ illumination with a reduced luminance compared to the luminance in the flash operation, such as by maxi ^¬ times 4000 cd / m ² , in particular of at most 1000 cd / m. Preference ^¬ wise, the thin-film component 2 then turns white or this is driven white light. In the latter case, the surface-illuminating thin-film component 2 can be technically designed to emit at least one additional color, such as red, in addition to light of the color white.

FIG. 2 shows a first embodiment of the inventive alarm flash lamp 1 in ceiling mounting with a surface-illuminating thin-film component 2 of organic semiconducting materials with an outwardly curved hemispherical luminous surface LF.

For this FIG 2 as well as for the following figures FIG 3 to FIG 5, a luminous area LF is assumed with a uniformly equal luminance.

In the example of FIG 2, the viewer from the registered line of sight BR would show a circular area. Reference number 9 designates a housing of the alarm flash lamp 1 and IF denotes an inner surface of the surface-illuminating thin-film component 2 which is designed as an open hollow body and faces the luminous surface IF. The latter is attached in the vorlie ^¬ ing example on the housing 9, such as snapped or glued. The inner surface IF itself is typi ^¬ cally designed to be non-luminous. The housing 9 also includes a flat mounting surface BF for mounting the alarm strobe light 1 on the ceiling as a mounting surface MF. According to the invention the flash light source 2 is a flächigleuch ^¬ tendes thin film device of organic semiconducting materials. In particular, such a device has a preferably uniform device thickness in the range of 0.5 up to 3 mm. The shown curved convex luminous surface LF, which is directed away from the housing 9, here describes the upper surface of a hemisphere ^¬ . The cavity HR surrounded by the hemisphere can be used to accommodate the components of the alarm flashing light 1.

In the present example, the thin-film component 2 is surrounded by a transparent protective cover 20 for protection against external mechanical influences and against contamination. The protective cover 20 is preferably made of transparent plastic. The arealuminous thin-film component 2 and the protective cover 20 may already be prefabricated as a structural unit 21. Alternatively, the protective cover 20 may already be a transparent carrier layer of a thin-film component 2 itself, wherein an anode or cathode layer and the emitter layer with the luminescent dyes are then applied to the carrier layer, as described above.

FIG. 3 shows a second embodiment in ceiling mounting with a surface-illuminating thin-film component 2 with a luminous surface LF comprising the surface of a biaxial half-ellipsoid. Hl, H2 and H3 designate the three orthogonal half-axes of the half-ellipsoid.

In the present example, the two semiaxes H1 and H3-since they are biaxial-have the same length, so that the observer would see from the registered viewing direction BR a circular area as the projected surface of the half-ellipsoid. Further ^¬ the ratio of the semi-axis Hl to the semi-axis H2 of the semi-ellipsoid here 2: 1. This results in a Ab ^¬ beam characteristic (see FIG 6) of the illuminated area LF, which advantageously meets the requirements of the aforementioned standard UL 1971 v3. 4 shows a third embodiment in ceiling mounting with a thin-film component 2 with a luminous surface LF comprising the surface of a truncated cone. In this example, the viewer would again show a circular area from the registered viewing direction BR.

In addition, the alarm flashing light 1 shown is set up for indirect wall mounting, in that it is preferably detachably fastened to a base SO with its fastening surface BF on the housing side. The base SO in turn is then already mounted with its base mounting surface SF on the wall as a mounting surface MF.

5 shows a fourth embodiment in wall mounting with a surface-illuminating thin-film component 2 with a part of the surface of a pointed cone comprising

Luminous area LF. Here, the viewer would see a circular sector as a luminous area LF. FIG. 6 shows characteristic curves for the emission characteristic of a

Alarm flashing light 1 according to the standard UL 1971 v3 (curves C, WH, WV) in comparison with that of a Lambert 'see radiator (characteristic LAM) as well as those of the arealuminous thin-film devices 2 according to FIG 2 and FIG 3 (characteristic SEMI, ELL).

With I a normalized to a maximum intensity value of 100% light intensity as a function of a respective Ab ^¬ beam angle α _Η , Θ _Η , θ _{ν is} plotted. Here, _H denotes a horizontal angle egg nen for an alarm flash lamp 1 in De ^¬ ckenmontage. Θ _Η and θ _ν denote horizontal and vertical radiation angles for an alarm flashing light 1 for wall mounting.

For all three illuminated areas LF a uniform luminance was assumed. All listed characteristics are set to the maximum intensity value of 100% at a radiation angle _α Η From ^¬, _Θ Η, _{ν θ} of 0 ° normalized. With C is a UL characteristic for the radiation characteristic of an alarm flashing light 1 is shown in ceiling mounting, which is the same for both positive and negative radiation angle a _H. In comparison with the punctured radiation characteristic LAM of a Lambertian (flat surface radiator), it can be seen that such a radiator can not provide enough light in lateral emission angles a _H with absolute angle values of at least 85 °. By contrast, the standard requirement for lateral emission is met by a flat-emitting thin-film component with a hemispherical and biaxial semi-ellipsoid light surface LF. The associated emission characteristics are designated SEMI and ELL. The ab ^¬ radiant characteristic ELL of the semi-ellipsoid according to FIG 3, ie, at a ratio of semi-major axis for Hl semi-axis H2 from 2: 1) there but not quite the standard requirements fulfilled in the angular range of 25 to 30 °. This could be remedied eg by a changed ratio of 2.5: 1. Alternatively or additionally, the essentially identical luminance of the thin-film component can be increased in such a way that the emission characteristic ELL according to FIG. 6 includes the UL characteristic C, so that the requirement according to the standard UL 1971 v3 is met.

WH and WV show the two UL characteristics for the emission characteristics of an alarm flashing light 1 for wall mounting for horizontal and vertical radiation angles Θ _Η , θ _ν . Again in comparison with the dotted emission LAM a Lambert see 'radiator (flat surface emitter) shows that such a radiator quietly light can not genü- deploy in lateral beam angle _Θ Η with absolute Win ^¬ kelwerten of at least 75 °. By contrast, the entire standard requirement is met by a surface-illuminating thin-film component with a hemispherical and biaxial semi-ellipsoid luminous surface LF.

The FIG 7 shows a fifth embodiment of the alarm strobe light 1 in ceiling mount with a flat luminous ebe ^¬ NEN thin film device 2. latter is a transparent Protective cover 20 upstream of the mechanical protection. The arealuminous thin-film component 2 is preferably circular. FIG. 8 shows a sixth embodiment in ceiling mounting with a surface-illuminating flat thin-film component 2 and with an upstream diffusing lens LI. The diverging lens LI is preferably a Fresnel lens which has such optical properties that the light emitted by the light surface LF is deflected more in the direction of the side with respect to the ceiling as a mounting surface. Alternatively it can be preceded by a mirror or semitransparent mirror as an optical means, the reflective properties such ^¬ has that a portion of the light emitted from the thin film component 2 light, preferably in the range of 5 to 15 ~ 6, is deflected in lateral directions. As a result, the requirements of the standard UL 1971 v3 or the European standard EN 60825-1 can be met. FIG. 9 shows a seventh embodiment in wall mounting with a planar illuminating flat thin-film component 2 and with an upstream Fresnel scattering lens LI.

10 shows the layer structure of a flat luminous thin-film device 2 with a curved light emitting area LF at ^¬ way of example two drivable separately emitter sublayers SEI, SE2 for emitting white light WHITE in different directions. With Tl and T2, the two differently directed partial luminous surfaces are designated.

The thin-film component 2 has from bottom to top a carrier, anode, hole line, emitter and cathode layer ST, SA, SL, SE, SK. The transparent, preferably clear carrier layer ST is in particular made of a plastic. The backing layer simultaneously ST can also be a transparent protective cover for the mechanical protection of the surface luminous thin film component 2 with a corresponding layer ^¬ thick. The conductive cathode layer SK is a reflecting metallic layer, so that the light emitted from the emitter ^¬ layer SE light is reflected by the cathode layer SK in the direction of the transparent support layer ST. To emit light, the emitter layer SE has a concentration of red, green and blue luminous dyes R, G, B, which emit additively white light WHITE when electrically excited.

In the present example, the cathode layer SK has two partial cathodes SKI, SK2 which are next to each other and electrically separate from each other. The latter are for electrical excitation via a respective switching element 41, 42 ver ^¬ connected with the control unit 5, so that a respectively associated opposite emitter sublayer SEI, SE2 emits the white light WHITE with fresh excitement.

FIG 11 shows the layer structure of a flat luminous thin ^¬ layer component 2 with a curved light emitting area with, for example ^¬ way of two controllable separately emitter sublayers SEI, SE2 for emission of red light or white light RED WHITE in different directions. Compared to the previous embodiment, the left part of the emitter layer SE2 only red-emitting fluorescent dyes R and the right ^¬ emitter sublayer SE2 red, green and blue luminous Leuchtfarb- substances R, G, B on. Consequently, in the case of electrical excitation, the left emitter sublayer SE emits red light RED and the right emitter sublayer SEI emits white light WHITE, and this also in different directions because of the curvature or curvature of the luminous surface LF.

Figures 12 and 13 show the example of Figure 3 with a φ for revolution angle equal to the symmetry axis, but dependent on the verti ^¬ kalen angle a _v concentration K (a _v) of fluorescent dyes R, G, B in an emitter layer SE according to the invention ,

FIG 13 shows a plan view of the alarm flash lamp 1 ent ^¬ speaking of the illustrated in FIG 12 viewing direction XIII. The same concentration values thus form circular lines, as shown in FIG. Where M has the geometric mean ^¬ point is in each case entered for the biaxial shown semi-ellipsoid, with only the lower half is used as a luminous surface of the LF flächig- luminous thin film component. 2 General ^¬ my considered, the emitter layer SE as luminous area LF is dependent on the position on the luminous area LF concentration of fluorescent dyes R, G, B, and thus one of them dependent local luminance.

In particular, the emitter layer SE to such a position dependent on the local luminance, so that the sur fa ^¬ chigleuchtende thin film device 2 has a European of the ^¬ Standard EN 54-23 or to the North American Standard UL 1971 v3 approximate radiation pattern. With regard to the UL characteristic C for ceiling mounting and to the radiation characteristic of the biaxial half-ellipsoid ELL in FIG. 6, the luminance for absolute angle values between 5 ° and 20 °, between 35 ° and 40 °, and between 50 ° and 85 ° are lowered, since in this range the characteristic ELL clearly exceeds the standard requirement. In other words, these emission directions is unnecessary amount of light abgege ^¬ ben. Secondly, the luminance for absolute angle could be increased ^¬ values between 25 ° and 30 ° since reaching the characteristic ELL in this loading the standard requirement - although scarce - not met.

In the example of FIG 13, the surface luminous thin ^¬ layer component 2, two juxtaposed sublayers emitter SEI, SE2, both of which together form the emitter layer SE and emit light. Both are each controlled via a not shown in this illustration switching ^¬ element for a selective direction-dependent Lichtabstrah- treatment. Thus, for example, the alarm flash 1 shown in the case of wall mounting be adjusted so that the "upper" Emitterteilschicht SEI for the optical alarm is not energized or only with reduced luminance. FIG 14 to FIG 16 show an eighth embodiment in wall ^¬ assembly with a surface luminous thin film device 2 with a full biaxial quarter ellipsoid light ^¬ area LF and a θ for vertical and horizontal angle _ν, _Θ Η-dependent around the symmetry axis concentration Κ ( θ _ν , Θ _Η ) of fluorescent dyes in the emitter layer of the thin-film ^¬ component 2. The vertical angle θ _ν can be seen in FIG 16 in particular in FIG 14 and the horizontal angle Θ _Η . FIG. 14 shows a side view of the alarm flashing light 1, FIG. 15 shows a front view, and FIG. 16 shows a view from "above" of the alarm flashing light 1.

FIG. 17 and FIG. 18 show a ninth embodiment of the inventive alarm flash lamp 1 in wall mounting and with a luminous surface LF comprising a part of the lateral surface of a cylinder. FIG. 17 shows a side view and FIG. 18 shows a front view.

Reference sign list

1 flashing light, danger detector

2 organic light emitting diode, OLED

3 energy storage, capacitor, accumulator,

battery

4, 41, 42 switching element, transistor, FET

5 control unit, microcontroller

6 Communication interface, bus connection 7 Smoke detectors, flue gas detectors, gas detectors

8 detector unit

9 housing

10 danger alarm system

11 Security Control Center

20 protective screen

21 assembly, OLED module

AL alarm message, warning message

B blue color phosphor

BF mounting surface

BR viewing direction

C Characteristic according to UL standard for ceiling mounting

E electrical energy

ELL characteristic of an ellipsoid radiator

G green color phosphor

Hi, H2 half axis

HR cavity

I light intensity

IF inside surface, inside

IN first control command

K (a _H ), concentration of fluorescent dyes

Κ (Θ _Η , θ _ν )

LAM characteristic of a Lambert 'see spotlight

LF illuminated area, outside

LI dispersion lens, Fresnel lens

M center point

MF mounting surface, wall, ceiling

ML detector line, detector bus NOT second control command

R red color phosphor

RED red light

SA anode layer

SE emitter layer

SE1-SE4 emitter partial layer

SF base mounting surface

SK cathode layer

SKI, SK2 partial cathode layer

SL hole line layer

SO socket

ST carrier layer

T1, T2 partial illuminated area

SEMI characteristic of a hemispherical radiator

WH Horizontal angle curve according to UL standard for wall mounting

WV characteristic for vertical angles according to UL standard for

wall mounting

WHITE white light

Θ _Η Horizontal angle

θ _v Vertical angle

a _v vertical angle

φ orbital angle

Claims

claims

1. alarm flash lamp for a security alarm system, which has a flash light source (2) for the optical alarm in the event of danger, an energy storage (3) for storing electrical energy (E), a switching element (4) and a control unit (5) for releasing the stored elec ^¬ cal energy (E) from the energy storage device (3) via the switching element (4) to the flash light source (2), and a housing (9) with a housing-side mounting surface (BF) for direct wall or ceiling mounting or attachment to a Socket (SO) for indirect wall or ceiling mounting,

characterized in that the flash light source (2) is a surface-illuminating thin-film component (2) made of organic semiconducting materials (OLED).

2. alarm flash lamp according to claim 1, wherein the arealuminous thin film component (2) on the housing (9) is mounted and a housing (9) opposite the inner surface (IF) and a away from the housing (9) directed outwardly projecting luminous surface (LF) having.

3. alarm flash lamp according to claim 2, wherein the outwardly projecting luminous surface is a curved luminous surface (LF) and comprises a part of the surface of a sphere, a cylinder, a cone, an ellipsoid, a paraboloid or a hyper ^¬ boloids.

4. alarm flash lamp according to claim 1, wherein the thin-film component (2) is a flat arealuminous component.

5. alarm flash lamp according to one of the preceding claims, wherein the arealuminous thin-film component (2) has a substantially uniform luminance on the luminous surface (LF).

6. alarm flash lamp according to one of claims 1 to 3, wherein the curvature of the surface-emitting thin-film component (2) is such that this one to the European standard

EN 54-23 or has a similar to the North American standard UL 1971 v3 emission characteristics.

7. alarm flash lamp according to one of the preceding claims, wherein the arealuminous thin-film component (2) is adapted to flashlight with a uniform luminous density in the range of 10,000 cd / m ² to 200,000 cd / m ² , in particular ^¬ special of 25,000 cd / m ² to 100,000 cd / m ² , to be sent out.

8. alarm flash light according to one of the preceding claims, wherein the arealuminous thin-film component (2) has a luminous area (LF) with an area in the range of 10 cm ² to 200 cm ² , in particular from 50 cm ² to 150 cm ² .

9. alarm flash lamp according to one of the preceding claims, wherein the arealuminous thin film component (2) has a carrier, anode, Lochleitungs-, emitter and cathode layer (ST, SA, SL, SE, SK), and wherein the emitter layer (SE) a concentration of fluorescent dyes (R, G, B), which emit at least light in the optically visible region upon electrical excitation.

10. alarm flash lamp according to claim 9, wherein the emitter ^¬ layer (SE) has a dependent on the position on the luminous surface (LF) concentration of luminous dyes (R, G, B) and thus a dependent thereon local luminance.

11. Alarm flash lamp according to claim 10, wherein the flat ^¬ luminous thin-film component (2) directed away from the housing (9), outwardly curved luminous surface (LF) and wherein the emitter layer (SE) dependent on the position on the local luminance has the fact that the ^arealuminous thin-film component (2) has an emission characteristic which approximates to the European standard EN 54-23 or to the North American standard UL 1971 v3.

12. Alarm flash lamp according to one of the preceding claims, with an arealuminating thin-film component (2) upstream optical lens (LI) for scattering and / or spatial expansion of the emitted light.

13. alarm flash lamp according to claim 9, wherein

- wherein the cathode layer (SK) has two to four electrically separated from each other, adjacently arranged partial cathodes (SKI, SK2) or wherein the anode layer (SA) has two to four electrically separated partial anodes, and

- Wherein the partial cathodes (SKI, SK2) or the partial anodes are each connected via an associated electrical switching element (41, 42) to the control unit (5), so that when driving a switching element (41, 42) a respective associated Emitterteilschicht (SEI, SE2 ) as Partleuchtflä ^¬ che (Tl, T2) emitted light.

14. Alarm flash lamp according to claim 13, wherein the alarm flash light directed away from the housing (9) outwardly ra ^¬ ing, in particular outwardly curved luminous surface (LF) and wherein the Emitterteilschichten (Sl, S2) on the luminous surface ( LF) are spatially distributed, that when electrical control of the respective Emitterteil- layer (Sl, S2) a directed light emission in different directions ^¬ nen can be achieved.

15. Alarm flash lamp according to one of the preceding claims, with a receiving unit (6) for receiving a first control ersignals or control command (IN) for the control unit (5), wherein the control unit (5) is adapted to the arealuminous thin film component (2). with a control by the first control signal or by the first STEU ^¬ command (IN) specified brightness, flash duration and / or repetition frequency to control.

16. Alarm flash lamp according to claim 15, wherein the flat ^¬ illuminating thin-film component (2) is a white-luminescent or white luminous controllable thin-film component, wherein the receiving unit (6) for receiving a second control ersignals or control command (NOT) is set up and wherein the control unit (5 ) adapted for receipt of a second control signal or control command (NOT) the sur fa ^¬ chigleuchtende thin film device (2) with continuous light having a reduced luminance of at most 4,000 cd / m ^2, in particular of a maximum of 2000 cd / m ^2, for a control to emergency lighting ^¬.

17. Danger alarm system with a hazard warning center (11), with a detector line connected to it (ML) and with a plurality of connected to the detector line (ML)

Alarm flashing lights (1) according to claim 15 or 16, wherein the alarm flashing lights (1) each have a receiving unit (6) for receiving electrical energy (E) and / or control commands (IN, NOT) from the detector line (ML).

18. Security alarm system with a radio-supported alarm center ^¬ decentralized and with a plurality of radio at the hazard report center notified radio-controlled alarm strobe lights (1) according to claim 15 or 16, wherein the alarm strobe lights (1) each have a battery and / or accumulator for electrical energy supply of the alarm strobe light (1) and a radio receiving unit (6) for receiving control commands (IN, NOT) from the radio-supported security panel.