DE202016103849U1 - Signage - Google Patents

Abstract

Escape sign light (1), the at least two, alternately displayable, formed by light images with directional pictograms by a controller (12, 15) which is designed to control a segmented transmission switching element (11), due to a beam path of a first in one A light space (8) which is fed in through a light guide plate and can be transmitted through it produces at least one light source (9), wherein a coupling of the light into the light guide disc via a coupling side (13, 13a, 13b) of the light guide surface (14) is angled Light space (8) takes place, wherein the lighting means (9) is designed as a first light source for generating light of a first wavelength at a first time corresponding to a color valence of a base color of a color space or a color system, wherein by the controller (12, 15) the transmission switching element (11) an area-wise Durchschaltu ng and / or blocking the light exit surface (14) of the light space (8) at a second time is vornehmbar, whereby a surface influence of the emission of at least one light of a further wavelength during the second time is effected, the color valence of a second base color of the color space or of the color system to produce a visually-formed mixed color for producing at least a portion of the image, and wherein the color system or color space comprises as a base color white light or a color set having a white tone.

Description

The present invention relates to a escape sign luminaire which can produce at least two, in particular alternately displayable, light-formed images such as directional pictograms by a controller which is designed to control a transmission switching element.

In other words, the present invention deals with a escape sign lamp.

Technical area

Escape sign luminaires are luminaires intended to indicate the path, in particular an escape route, to people by means of illuminated or backlit escape signs, and are often to be installed in areas close to the door, in a clearly visible manner, in particular overhead.

Quality, color choice and brightness, as well as contrasts, including visibility, address a wide range of standards that escape sign luminaires have to meet if they are used in a certain territory, such B. the Federal Republic of Germany, should be built at all. Such a norm is the DIN EN 1838 - 2013 , This standard defines luminous intensities that have to comply with emergency lighting. Another notable standard is the DIN 4844-1: 2012-06 which defines inter alia luminance contrasts and color order systems for security colors. In addition, the DIN ISO 3864 (see esp. DIN ISO 3864-1 2012-06 respectively. DIN ISO 3864-2 2008 With DIN ISO 3864-2 Corrigendum 1 2011-09 such as DIN ISO 3764-3 2012-11 ), inter alia, the average luminance of the white contrast color in cd / m ² fixed. In addition, numerous other standards must be observed, which specify country-specific supplementary regulations in addition to the standards that apply across national borders. Exemplary is the BS 5266-1: 2011 for Great Britain, which calls for the applicability and observance of numerous other standards and, among other things, determines the illuminance in a ground-level area, which must ensure a safety light. For some states or in some territories, in turn, standards that are adopted from other jurisdictions such as the United States apply. That is, emergency sign luminaire manufacturers must not only pay special attention to visual and aesthetic requirements when designing a signage luminaire, but also in terms of meeting the numerous standards, depending on where the escape sign luminaire is ultimately to be mounted. While in some territories standards dictate that green areas must be present in an escape sign, in other territories luminaires lit in a red light area are preferred.

For some years now, there has been a tendency for more and more operators of large buildings to wish to describe the escape routes as needed. This means that if larger crowds of people have taken an escape route, a subsequent group of people may be directed by means of a different escape route.

Because a escape sign luminaire is a safety-relevant component that can only light up depending on the current, requirements are articulated to offer as economical as possible the lamps consuming the electric current.

An interested reader immediately recognizes that the demands on a escape sign light contradict sometimes diametrically. The luminaire should as far as possible not require power, but at the same time as long as possible and fulfill all applicable standards in their field of application, including u. a. including the fulfillment of minimum brightness.

State of the art

In the intellectual property literature can already find some documents that deal with the creation of escape sign lights, with which escape route guides should be possible.

The EP 2 902 995 A1 (Applicant: CEAG Notlichtsysteme GmbH, filing date: 23/01/2015) and also the related prioritization DE 10 2014 001 371 A1 (Filing date: 03.02.2014) describe a safety or escape sign light, which has a variable display area. A controllable optical shutter area is provided with the z. B. an arrowhead for the direction of the escape route can be switched visible in a first state, in an alternative control then another arrowhead can be switched visible. The switchable region formed in one embodiment as an LCD shutter region may consist of a liquid crystal surface, which is switched either transparent or opaque. Another possibility is to block only certain portions of the visible spectral range to transmit a light color. The closure region can be formed congruent to a part of the pictogram. To control the closure region or the closure regions, a luminaire electronics system that is present within the luminaire and that also serves to control a luminous means should be used. For switching times in the millisecond range should be maintained. Further details of the LCD shutter area will be described with reference to an embodiment. Accordingly, it should be to be an "LC glass" comprising a polymer liquid crystal film. By aligning the liquid crystal molecules when applying a voltage, the glass should become transparent. When the voltage is removed, the glass should become opaque again. Special consideration of the wave characteristics of the light does not seem to have been considered. For the realization of the lamp with variable display area no additional bulbs or power supplies should be required because the existing light sources, eg. B. LEDs at a light entrance edge of a Lichtverteilplatte should be sufficient.

The same applicant, the CEAG Notlichtsysteme GmbH, once seems to have pursued a slightly different concept, in which a permanently displayed information content of an escape route display can be overlaid with an additional display, such. B. in the EP 1 351 206 B1 (Filing date: 26.03.2003). The additional display should be directly controllable by means of a binary control input. As light elements light-emitting diodes or light guide elements are mentioned, which can also flash in an emergency to attract the attention of the beholder. The embodiment according to 1 of the EP 1 351 206 B1 explains that the additional display of X-shaped light elements is to be formed.

A similar concept as in the EP 1 351 206 B1 will also be in the EP 2 889 848 A1 (Applicant: CEAG Notlichtsysteme GmbH, filing date: 15.12.2014). In this case, LEDs are mentioned in RGB design, which should also be suitable for a color change. A part of the lighting means, which are referred to as the first lighting means and are intended to uniformly illuminate the pictogram, are to be arranged along a light entry edge of a light guide plate.

According to the EP 2 911 141 A1 (Applicant: CEAG Notlichtsysteme GmbH, filing date: 26.01.2015) should be placed in a lamp such as a escape sign a secondary symbol on a symbol plate, which can be superimposed on a light incident edge by turning on and off a secondary light source a primary symbol. The primary illuminant is usually white. As the light color for the secondary agent red is proposed. Various configurations of pictogram plate, symbol plate, light distribution plate on the one hand and bulbs on the other are mentioned. An at least partial or complete switching off of the primary illuminants would be so loud EP 2 911 141 A1 realizable.

Another possibility for the realization of changeable signs is in the EP 1 865 484 A1 (Applicant: CEAG Notlichtsysteme GmbH, filing date: 08.06.2006) the use of OLEDs, whereby suitable control electronics should be able to combine the colors red, green and blue to other colors. It is also mentioned in this document that non-addressed surface elements are advantageously transparent. An arrangement of surface elements in different OLED layers would be considered. Also, a control by a control device in response to ambient and / or operating conditions is addressed. In addition, a combination of a backlight with an OLED layer and a lateral light coupling into a disk z. B. mentioned by LEDs for a marker light, but such an arrangement would require an increased design effort to achieve the most uniform illumination possible.

In the published patent application DE 195 45 700 A1 (Applicant: Dr.-Ing. Willing GmbH, filing date: 07.12.1995) describes an indicator lamp with variable content, in which different note elements, which are stacked on each other, are each assigned to different light guide plates. The reference elements on the various panels should be designed so that the elements in the foreground do not hinder the elements in the background in their light emission.

The finding that a lateral coupling of a luminous flux of a luminaire in a light space is advantageous, is also already in the patent DE 10 2009 060 607 B4 (Patent owner: RP-Technik GmbH, filing date: 23.12.2009).

From the aforementioned publications it can be seen that many have been working for a long time to create by means of an advantageous light guide the most efficient safety or escape sign light. It can also be seen that other publications are devoted to the subject of escape route guidance by the treatment of luminaires to be created for this purpose.

The aforementioned documents are incorporated with their designation as fully in the present invention description. This is to avoid that again and repeatedly well-known relationships between the requirements for escape sign lights and the influence of illuminant arrangements must be fully discussed, but by reference to the publications, these relationships should also be considered as defined for the present invention.

According to the patent application DE 196 31 700 A1 (Applicant: Peter Brandt, Klaus Heberle; Filing date: 06.08.1996), a display device, which is designed as an LCD screen, is used to create a warning message display. In an LCD screen, the LEDs are known (see the sole figure of DE 196 31 700 A1 ) in the background. A colored image should be composed of individual pixels. At least one light source should be provided for each primary color. It is proposed to design the light-emitting diodes as so-called multi-chip light-emitting diodes because this would enable each light-emitting diode to generate any desired color. A waiver of additional use of filters to represent the colors is considered advantageous. As a cost, alternative light sources neon tubes instead of LEDs are proposed.

The Utility Model DE 20 2007 011 542 U1 (Owner: Zumtobel Lighting GmbH, notice of registration: 05.02.2009) deals with the topic of a flexible, adapting to the subsequently amended escape route luminaire. Such a lamp should have a display as a display unit, the z. As an OLED screen, a TFT or LCD display can be. In addition, the lamp should be equipped with a memory device and a control unit. It is proposed that a corresponding indicator light should have an input device that can be manually selected between images. Via an interface, new image information should also be able to be stored in the memory unit after commissioning.

A display system with circadian effect on humans is in the utility model DE 20 2009 018 852 U1 (Owner: Fraunhofer-Gesellschaft for the Promotion of Applied Research eV; publication notice: 16.01.2014). It is assumed that the release of melatonin in humans is light-controlled. In particular, the presence of light of wavelengths in the range of 464 nm is considered as the starting point for further considerations. The perception of the "white color" of the display system should be changed as little as possible. By looking at the display system, a work rhythm should be positively influenced. Occurring fatigue should be such. B. be reduced. To this end, the authors want to take advantage of the fact that different light spectra, so-called metamers, can cause the same color impression in humans for a given type of light. A daytime-dependent change of spectra should thus be possible. According to one embodiment variant, the light of the light sources is passed through a diffuser element onto a matrix of an LC panel. This is followed by an RGB filter. On the exact operation of the diffuser element, an LC cell array, the RGB filter and a control unit will not be discussed, because this already be known components to use. The LEDs used for the generation of an RGB image signal to z. B. have an emission maximum at 420nm (Blue 1), 500nm (Blue 2), 560nm (Green) and 700nm (Red). The control unit was preceded by an image adjustment unit in order to make the desired adjustments of the RGB components of the image signal depending on the spectral composition of the emission spectra of the light sources. In one variant, no color filters are integrated and the image representation should be effected by a time-sequential representation of the corresponding color components of the image by a synchronized backlighting in the corresponding spectral colors. In this case, the control unit for the light sources is synchronized with the control unit of the LC panel.

task

It would be favorable to know a concept of a escape route light, through which exist for as many territories as possible, regardless of that exist in these divergent standards, eg. As in terms of brightness, in terms of color or in terms of pictogram design, the same escape sign light can be used. In addition, if the escape route luminaire also offers the option of making escape route guidance possible, a escape route luminaire would be known which covers a broad field of application, both in terms of its territorial scope and in terms of its application areas.

invention description

The object of the invention is achieved by a rescue sign light according to claim 1. Advantageous developments can be found in the dependent claims.

The invention uses, inter alia, the recognition that with a selected set of colors, for. B. Red, Green and Blue (RGB), almost the entire color spectrum can be covered. Another set of colors is cyan, magenta and yellow (CMY). In addition to color sets with three colors (or according to the three-color theory), color sets with four colors or more can also be selected (four, five or six selected single colors). By way of example, a color set CMYK is possible instead of the color set CMY. The colors of the color sets span a color space that can cover almost the entire color spectrum, ie the primary colors themselves and the shades in between. From a system of four primary colors, such. B. the color set CMYK, also a hexachromer color space can be made, by setting two more colors or shades as primary colors, e.g. B. the shades of green and orange. Another well-known color system is the PMS (Pantone Matching System), which is based on 18 basic colors. In other words, shades or the sets of colors are also called primary colors. The basic colors can be designated by their color valence. Color valency can be used to describe the sensory impression of a color in the human eye.

Advantageously, white or white light is added. As a result, white tones, so-called tinted white, can then be created, so that the display of the escape sign lamp emits light that is perceived as warm or that has been modeled on the natural sunlight.

Instead of using light sources that are tuned to a particular wave spectrum whose color is set according to standards, the present invention uses - after an interesting aspect - on the approach to produce using a basic color system, possibly by mixing, the standard color shade. Although the colors of the color system or the basic colors of the color space do not have to agree with the desired color nuances according to the relevant standards, the colors for the escape sign luminaire can be selected from the color space by being displayed as mixed colors by additive or subtractive mixing of the primary colors.

According to an interesting aspect of the invention, an escape sign lamp at least two light-formed images such. B. generate trend-setting pictograms. The images can in particular be displayed alternately. In this case, the at least two images are generated in this case by means of light from at least one light source by a controller, wherein the controller is designed to control a transmission switching element. The beam path is designed so that the light is first passed through a light space.

The luminous means can emit light of a first wavelength which corresponds to a color valence of a primary color of a color space or of a color system. Furthermore, light of at least one further wavelength can be generated in the luminaire. In one embodiment, the light of the further wavelength comes from the same light source as the first wavelength. In other words, a light source can emit light having a plurality of wavelengths depending on a drive, in particular a (first) wavelength at a (first) time and another (second) wavelength at a second time. However, it is also possible to emit the further wavelength from another light source. The further wavelength corresponds to a color valence of a second base color of the color space or of the color system.

The light of the first wavelength and the further wavelength is fed into the light space. The light space forms a light distribution body. He can z. B. are formed of a material in which the injected light of the bulbs distributed as evenly as possible. As a material z. B. a transmissive, light-scattering material can be used. The light space can be formed for example by a light guide. The light space has a light exit surface, which contributes to the production of the images.

By the control of the transmission switching element, a surface-by-through connection and / or surface blocking of individual sections of the light exit surface of the light originating from the light space can be undertaken. The controller can control individual transmission switching elements. This will either allow or block light at selected locations. The transmission switching element can cover the entire light exit surface or only a part thereof. By surface switching through and / or blocking the light exit surface, a surface-wise influencing of the exit of at least the light of the further wavelength is effected in order to produce a visually to be formed mixed color for generating at least a portion of the image. In this case, the exit of the light of the first wavelength can remain unaffected or can also be influenced by area or area. The escape sign luminaire operates, inter alia, with the aspect of superposing the light of the first and further wavelengths. By influencing the beam path of the light, the image forming is also influenced. The mixed color results from an interaction of influencing the beam path and the temporary emission of light of a first wavelength and a further wavelength. In this case, the reaction of the eye of the observer is included. The color valency forms due to the inertia of the viewer's eye. Depending on the transmitted or blocked portion of the affected light, the mixed color may take on a wide range of color nuances. Also, the entire color space can be exploited, which is made possible by the primary colors. If, in addition to the light of the first and the further, ie, for example, the second wavelength, light of a third, fourth or even another wavelength is fed into the light space, and the exit of this light can be influenced area by area or remain unaffected. The extra light in turn can contribute to the color scheme of the mixed color.

The surface influencing refers to a surface part of the light exit surface, wherein one or more surface parts together make the display of the image. By controlling the transmission switching element, the switching and / or the blocking of the light exit surface for the exit of a light from the light space can be regulated differently for different surface parts. For the viewer of the escape sign lamp results from the surface part or the parts with the visually formed mixed color and possibly surface parts with light of a primary color of the color space, the desired image or icon. The visual formation of the mixed color is based on the subjective perception of a color by a viewer of the escape sign light, so the Farbvalenz, as it is detected by the viewer.

It is a considerable advantage in a escape sign luminaire that the image on the escape sign lamp can be easily changed and adapted to current circumstances by means of the control of the transmission switching element in a very short time. This makes an immediate escape route possible without delays in the display on the escape sign lamp. Furthermore, only a few energy-consuming components are necessary for the escape sign light, since by means of the visually occurring color mixing a sufficient color spectrum can be made available to meet the requirements of the lamp.

In the following, advantageous embodiments and developments are set forth, which in themselves, both individually and in combination, can also disclose inventive aspects.

In an advantageous embodiment of the escape sign luminaire, there are at least two luminous means with at least two different wavelengths, which are preferably distributed within the escape sign luminaire. This results in a uniform coupling of light into the light space, a more uniform illumination of the light space and a uniform light emission via the light exit surface. As lighting can z. As conventional LED light sources or OLEDs are used. Advantageously, a light source for emitting light from a set of different shades of different wavelengths designed, in particular from a set of three to six different shades, preferably the set includes all primary colors of the color system. The bulbs can then provide a color system, as previously described, such as an RGB color set or a CMY color set. The color set includes, for example, wavelengths in the range of 660 nm to 430 nm. Advantageously, the set of different shades also contains a white, so that even color areas with tinted white tones can be covered in the image of the escape sign.

The lighting means are aligned for coupling the light via a coupling-in side of the light space. Preferably, the coupling-in side is angled away from the light exit surface. That is, the coupling-in side does not coincide with the light-emitting surface and does not run parallel to it. This can ensure that the coupled light is distributed widely in the light space before it hits the light exit surface.

Furthermore, it is advantageous if the luminous means or the luminous means sends or sends no light in the direction of the transmission switching element. It can be achieved by a uniform, wide illumination of the transmission switching element.

The transmission switching element is formed, for example, areally and preferably runs parallel to the light exit surface. Preferably, the transmission switching element is arranged on the light exit surface. The transmission switching element is the light emerging from the light space, seen from the viewer of the escape sign light, upstream. The light of the light source exits from the light exit surface of the light space and, as a function of the control of the transmission switching element, can be influenced and faded in and out in regions by the surface parts of the light exit surface. This results in the viewer surface parts with a mixed color and possibly surface parts with a basic color. In principle, the light of the entire region of the light exit surface can also be influenced by the transmission switching element. In an alternative embodiment, more than three transmission switching elements are combined to form a (total) transmission switching element. In this case, the controller may be designed so that the escape sign lamp occupies at least two operating states. Preferably, the operating conditions differ by a state of at least one means for light distribution. Such a light distribution means may, for. B. by a means such as a driver to generate a driving pattern of the bulbs are formed. Also, the light distribution means may be given by a means such as a regulator for the transmission switching element, which determines one switching state or switching states of the transmission switching element. The activation of an operating state can z. B. via a potential-free Contact, such as with a smoke detector or BMA (fire alarm system).

In a likewise advantageous refinement of the escape sign luminaire, the control for an areawise transmission adjustment of the transmission switching element, such as switching through, partial switching on or blocking of the light emerging from the light space, is designed on the basis of at least one parameter of a lightwave front of the light. The transmission switching element is z. B. controlled as a function of a wave spectrum or polarization of a light wave or light wavefront. For example, a predefined wavelength range is filtered out, ie blocked, at a predetermined surface area of the transmission switching element, and another predefined wavelength range is transmitted, ie switched through. It is also possible for an areal transmission setting to stipulate that only horizontally or only vertically polarized light waves are transmitted through a surface area of the transmission switching element, ie are switched through, and the respectively differently polarized light waves are blocked. The controller thus determines the areawise transmission setting of the transmission switching element and thereby in turn the color valence. The color valency results from the light that emerges pictorially on a surface of the escape sign luminaire.

The at least one light-emitting means is advantageously designed such that it emits light with a plurality of intensity maxima, each intensity maximum corresponding to a wave spectrum. The plurality of intensity maxima complement each other to form light of a hue of the image, in particular a white hue. An area-wise modification of the hue by means of the transmission switching element can then produce different color surface parts of the image, although only one light source is used.

As a lighting means z. B. a light strip can be used, which advantageously comprises a plurality of LEDs, z. B. forms an LED strip. The light strip can be easily arranged along a coupling-in side of the light space. The multiple LEDs can emit different colors, such as the primary colors from the color sets described above. LED light sources are energy-saving and enable a long-lasting use of the escape sign light.

In one embodiment of the escape sign light, an image area or pictogram area spanning the image is subdivided into a plurality of image display parts, wherein these display parts jointly display an image and display different images or pictograms with different illumination of individual display parts. The image display parts can be compared, so to speak, with puzzle pieces whose shape and area remain the same for different images, but which can change or change their color scheme. The image area corresponds at least approximately to the light exit surface. At least one display part corresponds to at least one surface part region of the surface of the transmission switching element, which, viewed from the viewer, is arranged upstream of the light exit surface. The transmission switching element can be divided into segments for this purpose. With the transmission switching element, selected display parts and thus selected areas of the image can change their visual color to be formed. They thus generate a changeable image of the escape sign light in the viewer. In summary, one of the light-formed escape sign images may be defined by a predetermined selection of image display parts. A predetermined drive or setting of each of the image display parts is done by means of control. By a different drive or setting, a plurality of images can be displayed on the escape sign light, as will be explained in more detail below, without changing the components of the lamp.

In an embodiment, the transmission switching element may be made by a liquid crystal surface. Advantageously, the liquid crystal surface can then be divided into a plurality of surface subareas corresponding to the image display parts. The area subregions may be brought into different transmission settings by the controller, i. that is, they can switch back and forth between a through connection, partial connection and blocking, so that the light exit surface of the light space is subjected to a surface switching or blocking.

In an advantageous embodiment, the transmission switching element may comprise at least two polarizing filters overlapping each other. Polarizing filters can be realized like a foil. Such films can cover at least a partial area of the light exit surface. This corresponds to at least a partial area z. An image display parts as previously described. At least one of the polarizing filters is switchable. By an electrical control z. B. a polarization direction, z. B. a 90 ° offset or rotated, are hidden. By switching or switching on at least one of the polarization filters, the transmission setting of the transmission switching element between switching and blocking can be changed, so that in turn the viewer is a changed Farbvalenz caused. In an advantageous variant, with a first polarizing filter vertical component of a light and with a second polarizing filter a horizontal component of a light absorbed or filtered. For clarity, the vertical and horizontal components of the light may be on different frequency bands. Depending on the setting of the first and second polarizing filter, a different hue of the color space is created in the context of visual reception.

In one embodiment of the escape sign lamp, the controller is an electronic controller. The controller may be composed of several components or components which are arranged distributed in the escape sign lamp. In this case, it is advantageous for a part of the control unit to be remote from the transmission switching element or remote. By such a division of the control, a flat and compact design of the escape sign lamp can be realized. As a result, in particular over the entire surface of the escape sign light, a similar route for the coupled light until its exit.

As already stated, the transmission switching element is preferably a liquid crystal surface, which allows a rapid change between the transmission settings of the transmission switching element, in particular the image display parts of the transmission switching element, by means of the electronic control. The controller may include a memory in which at least two and preferably more than two images are stored. The images are defined in the memory by data for driving or adjusting the transmission switching element and the operating state of at least one of the lighting means. Advantageously, the data z. B. define the control or adjustment of the individual image display parts of the transmission switching element. The stored image data can be retrieved directly by the controller and produce a quick change of the image on the escape sign lamp. The fast changing of the images allows an effective escape route guidance if necessary.

In a memory of the escape sign light, a plurality of image data can be stored, which are each designed for different requirements for the escape sign light. If the escape sign light to allow escape route guidance in one case to the right and in another case to the left, corresponding image data from the memory for both images are alternately provided. For example, a first record for the requirements of a first country and a second record for the requirements of a second country may be kept to meet the standards of each country. Furthermore, the memory can be updated in a simple manner by exchanging or supplementing the memory data, if the requirements for the escape sign light change. Thus, the components of the escape sign light or even the escape sign lamp itself need not be replaced, but it is sufficient to perform an update of the memory with respect to the image data.

In a preferred variant of the control, this comprises a control algorithm, according to which a light with an intensity maximum of a hue is emitted in a light phase. A sequence of light phases of different hues is provided. Preferably, in the light phases, a light is emitted with an intensity maximum of a primary color of the color system, as provided by the lighting means or the lighting means. This can be z. B. by the sequential control of the different LEDs of a bulb. For example, a predetermined order of red, green and blue light phases of an RGB color system may be generated. Only a first wavelength is emitted at a first time. At a second time, a second wavelength is emitted. This happens in such short time intervals that the impression of a mixed color arises in a viewer, although both wavelengths are emitted at different times. The sequence of light phases causes the viewer of the escape sign light a sensory impression that helps him find an escape route and directs his attention to an indication of the escape route direction.

Advantageously, the light phase sequence takes place at a speed which, due to the inertia of the human eye during the visual processing of individual light phases, can not be perceived (consciously) separated by the viewer. It forms in the perception of the viewer a mixed color. Depending on which basic colors follow one another and how long the duration of light phases of a particular primary color is selected, the viewer can create visually formed mixed colors from the entire color space, as made possible by the primary colors. For this purpose, the control algorithm provides, for example, a sequence of more than 20 light phases per second. Preferably, a duration of a light phase is less than 10 msec, more preferably less than 6 msec. At a duration of less than 6 msec, a visual mixture of the individual colors can be achieved, which corresponds to an intensive color quality. In the sequence of light phases, a dark phase is preferably present between two light phases. Through the dark phases, the successive light phases be separated from each other, whereby the visual mixed perception of the hues is supported.

As previously described, the image area may be divided into a plurality of image display parts that collectively display the image required by the escape sign lamp. In order to allow a certain color valence of the individual display parts, the control algorithm assigns at least one light in a predetermined intensity maximum to a predetermined image display part. In principle, it is possible that all image display parts are supplied with a predetermined intensity maximum of the same hue. In this case, the image area has a uniform color, so that no contoured pictogram on the escape sign lamp is formed. In order to display an image, the control algorithm can in each case assign a predetermined intensity maximum of a different hue to the various image display parts. The individual image display parts thus have a different color valence and, taken together, form the image or pictogram to be displayed by the escape sign light. In an advantageous embodiment of the escape sign luminaire, each image display part is supplied by the control algorithm with a sequence of light phases of different hues, in particular with a predetermined intensity maximum of the primary colors, as described above. The individual image display parts can thus appear in visually to be formed mixed colors, so that a variety of different images can be displayed on the escape sign light. The control algorithm is there to drive different, predetermined image display parts by means of a pulse width modulation (PWM).

In an advantageous embodiment, the control algorithm is designed such that a current control of the lighting means takes place. By the current control of the lighting means, light of a predetermined hue can be emitted at a first intensity maximum, in particular at a first instant, and light with a second intensity maximum, in particular at a second instant, can be emitted. By means of the current control of the luminous means, differences in brightness and intensity in the case of different shades of this luminous means can be compensated for or intensified as required. Such differences in the luminous intensity of hues are z. B. known by LEDs. Next can be achieved with the power control in a simple and energy-saving manner, a light phase sequence at the light exit of the light exit surface and / or the transmission switching element, whereby the viewer creates the desired image.

In an advantageous embodiment, the control algorithm is designed to adjust a contrast of a white tone and / or a hue. On the one hand, the contrast adaptation can take place in connection with a passage through an image display part, in particular through at least two image display parts. The contrast adjustment of an image display part supports the visual color mixing in the viewer when he looks at the escape sign light. In particular, a contrast adjustment of two image display parts is provided, which are used to produce a single image representation in a mutually comparable state. The two image display parts can thus be matched to one another. On the other hand or in addition, the contrast adjustment between a representation of the image of the escape sign lamp and an illumination of an environment of the escape sign lamp can be done. The image of the escape sign light can thus better settle from the environment, so that the viewer is more easily aware of it. At the same time, a white balance can be made to give a warm light impression.

The previously described combinations and configurations can also be considered in numerous other connections and combinations.

For example, in accordance with the present teachings, a escape sign light can be provided that maintains records for more than one territory. Through a form of adjustment or programming the escape sign is matched to their target territory. If the standard requirements for the escape sign luminaire change, it is possible to switch to a different dataset, whereby the electronic components of the escape sign luminaire are kept unchanged and the escape sign luminaire exclusively continues to work with light sources which belong to a color set.

Brief Description

The present invention may be better understood by reference to the accompanying figures, which set forth by way of example particularly advantageous design possibilities without restricting the present invention thereto, the figures being as follows:

1 a plan view of a escape sign light according to the invention from the front,

2 a side view of the escape sign light,

3 a sectional view through the escape sign light,

4 a schematic representation of the component arrangement of an image display unit of the escape sign light,

5 a diagram of a screen layout in a escape sign luminaire according to the invention,

6 a diagram of a timing sequence for operating a escape route luminaire according to the invention,

7 a first example of a control unit for a escape sign lamp according to the invention,

8th a second example of a control unit for a escape sign lamp according to the invention and

9 a third example of a control unit for a escape sign lamp according to the invention.

figure description

In 1 is a front view of an embodiment of a escape sign light 1 according to the invention and in 2 a side view of this escape sign light 1 shown. The escape sign light 1 has a housing 2 on, in which the individual components of the lamp are housed. At the front, the housing points 2 a frame 3 around a recess, wherein the recess is an image display surface 4 Are defined. In the example shown, the recess is square-shaped, in particular rectangular-transverse, but it could also have a different shape, such as with rounded corners or with triangular, lateral boundaries. In 2 is a housing box 5 can be seen, the removable on a rear side of the case 6 is appropriate. The housing box 5 serves to accommodate components of the escape sign light 1 , The housing box 5 is useful for mounting the light. The case back 6 turn is at the frame 3 appropriate.

In 3 is a sectional view through the escape sign light 1 of the 1 and 2 shown. Between the case back 6 and the frame 3 is an image display unit 7 whose front side covers the entire image display area 4 the escape sign light 1 covered. On a back of the image display unit 7 are several components of the escape sign light 1 in the housing box 5 accommodated. In particular, in the housing box 5 Components of a control for escape sign light 1 housed, such. B. several boards 15 and 15 ' , Other components of the controller can also outside the housing box 5 be housed.

In 4 is a schematic representation of the inner assembly of the image display unit 7 represented, which also in 3 , but there in the installed state, can be seen. The image display unit 7 has a light room 8th in the form of a light guide, a first light source 9 , a second light source 10 , a transmission switching element 11 and a controller on. The controller includes a controller 12 , the side of the transmission switching element 11 is arranged.

The first and second bulbs 9 and 10 are the escape sign in this embodiment 1 formed as LED strips, each comprising a light-emitting diode (LED) for the colors red, green and blue. The light sources can therefore produce light of a first wavelength, here red, of a second wavelength, here green, and a third wavelength, here blue. The three wavelengths each correspond to a color valence of a base color of a three-color color system of the escape sign luminaire 1 for displaying images on the image display area 4 , Advantageously, the light of the bulbs 9 and 10 So several intensity maxima corresponding to the three primary colors, which are caused by a wave spectrum. Further, multiple intensity maxima may complement one another to form light of a hue of the image. By means of the bulbs 9 and 10 can thus be spanned a color space that can cover at least approximately the entire color spectrum and is available for image design.

Basically, the bulbs could 9 and 10 also provide other colors, such as cyan, magenta and yellow, thus providing a different color system. Furthermore, the bulbs could also provide more than three colors and thus provide a color system with more than three primary colors. Next could be the first light source 9 and the second light source 10 cover different colors.

The light room 8th is in this embodiment, the escape sign light 1 plate-like and square formed. He has a Einkopplungsseite 13 (more precisely two Einkoppelseiten 13a . 13b ), by the light of the bulbs 9 and 10 is coupled into the light space, and a light exit surface 14 through the light from the light room 8th exit, up. The light exit surface 14 is in the direction of the frame 3 aligned and covers the image display area 4 the escape sign light 1 , It will be advantageous a narrow side of the light space 8th as a coupling page 13 chosen, the angled to the light exit surface 14 is. In this embodiment of the light space 8th is the input side 13 at right angles to the light exit surface 14 intended. That of the bulbs 9 and 10 emitted light is not directly in the direction of the light exit surface 14 sent out, but spread in the light room 8th , as it is known from light guide disks. The first light source 9 is on a first docking page 13a and the second light source 10 on a second coupling page 13b arranged in this embodiment of the first coupling side 13a opposite.

On the light exit surface 14 of the light room 8th is the transmission switching element 11 in this embodiment of the escape sign lamp 1 is formed as a liquid crystal surface. The transmission switching element 11 is from a viewer of the escape sign light 1 seen from the light exit surface 14 upstream. The transmission switching element 11 covered in this variant, the entire image display area 4 but not the entire light exit surface 14 , In principle, it would also be possible that the transmission switching element 11 only certain parts of the image display area 4 covers. It is also conceivable that the transmission switching element 11 composed of several juxtaposed sub-elements. The transmission switching element 11 , So the liquid crystal surface can take different operating conditions by means of the controller. This happens z. B. by applying different electrical voltages to the liquid crystal surface, so that it changes the direction of polarization of light passing through the liquid crystal surface passing light. By means of the control can the escape sign light 1 occupy at least two operating states, which differ by the switching state of the transmission switching element. It is also possible - alternatively or in addition to the liquid crystal surface - to provide another light distribution means, such as the driver for generating a driving pattern of the lighting means 9 and 10 , The controller may advantageously be adjacent to the transmission switching element 11 be provided and with the transmission switching element 11 an assembly unit for the escape sign light 1 form. Likewise, the lens can be used as a light space 8th with the attached bulbs 9 and 10 an assembly unit for the escape sign light 1 form. Together, these two assembly units form the image display unit 7 ,

The escape sign lamp according to the invention 1 can by means of the light space 8th transmitted light and by the control of the transmission switching element 11 generate with the controller at least two images formed by light as directional pictograms. The pictures can z. B. be defined by image data and stored in a memory. To generate the individual images takes the control of the transmission switching element 11 an area by circuit and / or blocking the light exit surface 14 of the light room 8th before, by the transmission switching element 11 is switched to different operating states. As a result, a surface influence on the output of at least the light of one of the wavelengths of the lighting means 9 and 10 from the image display area 4 causes. Of course it is with the transmission switching element 11 also possible to influence other wavelengths of the light of the bulbs area by area. Due to the surface influence of the light emission from the escape sign light 1 For example, a mixed color can be formed visually on the affected area and the generation of at least one area of an image can be produced. For another picture z. B. additional exit area parts can be influenced. Also influencing the previously influenced surface parts by changing the transmission setting of the transmission switching element 11 and / or the control of the lighting means 9 and or 10 be made.

To display an image or pictogram on the escape sign light 1 is the image display area 4 advantageously segmented into several image display parts, as in 5 is illustrated. For a first icon z. B. the image display parts 20 . 21 and 22 a running person, the image display parts 30 . 31 and 32 a crossbeam of an arrow and the image display parts 40 . 41 and 42 represent an arrowhead to the left. These image display parts are displayed in a visually formed signal color by means of the control by switching on and / or blocking the light emerging from the light space for the viewer. The remaining image display parts z. B. are hidden, are displayed in an alternative embodiment in a background color, from which the signal color stands out clearly visible. The image design thus results from the surface influence of the light from the light space. The first icon indicates an escape route to the left. Another pictogram will have the image display parts 40 . 41 , and 42 dark and the image display parts 50 . 51 and 52 are displayed in the signal color. The displayed picture elements like the picture display parts 50 . 51 and 52 thus stand out from the background. The resulting second icon indicates an escape route to the right.

The individual image display parts, which together form the pictogram, are advantageously formed by dividing the liquid crystal surface into a plurality of surface segments as display subregions. Since the liquid crystal surface as a transmission switching element 11 a beam path of the light from the bulbs 9 and 10 at the exit from the light exit surface 14 of the light room 8th is arranged upstream, the individual display portions of the liquid crystal surface define the image display portions of the icon. In summary, those are due to the light of the bulbs 9 and 10 formed pictograms defines a predetermined selection of image display parts and a predetermined drive or setting of each of the image display parts by the controller.

In a preferred embodiment of the escape sign lamp 1 become the bulbs like the bulbs 9 . 10 (see. 4 ) are activated sequentially, that is, the individual color LEDs are activated in sequence as shown in FIG 6 is to be illustrated schematically. In 6 are the temporal patterns of a Rotansteuerung 60 a red LED, a green control 70 a green LED and a blue control 80 a blue LED for the bulbs 9 and 10 shown. Next is the time pattern of a white driver 90 an optional white light bulb shown. The lower diagram axis in 6 corresponds to a time axis. That from the controls 60 . 70 and 80 resulting luminous pattern has a sequence of intensity maxima of red light phases 61 . 62 . 63 , green light phases 71 . 72 and blue light phases 81 . 82 on, which are each interrupted by dark phases. This is followed sequentially by a red light phase 61 , a green light phase 71 and a blue light phase 81 before this sequence starts over. In the example shown, the individual light phases do not overlap in time. But between two successive light phases lies a dark phase, as can be seen by the distance of the light phases to the dashed auxiliary lines. The duration of the individual light phases and their temporal repetition takes place in a speed such that the human eye can not distinguish the individual light phases and delimit each other, but for the viewer, the visual impression of a color mixture arises. The hue of the color mixture can be adjusted by the duration of the red, green and blue light phases, the duration of the dark phases and the frequency of the sequence of the light and dark phases. It is possible to produce colors from the entire color space, the color spectrum determined by the color system of the luminous means. A duration of the light phases, and preferably also of the dark phases, is determined to be less than 10 msec, in particular less than 6 msec. The escape sign light can work with such control of the bulbs energy-saving and provide a wide color spectrum to meet different requirements for the escape sign.

Optionally, the light pattern with the white control 90 of the white light bulb, which are a succession of white light phases 91 . 92 . 93 causes. The white light phases 91 . 92 . 93 meet in the schematically shown control sequence with the red light phases 61 . 62 . 63 together. However, they could also coincide with other color phases or dark phases, or be overlapping. By supporting or integrating the white in the color design, a contrast compensation under the colors of the lamps and with the environment can be done.

For this purpose, the controller comprises a control algorithm, according to which in a light phase, a light having an intensity maximum of a first hue, z. B. green, is emitted and further a sequence of several light phases of different shades, z. B. red or blue, is provided. Between the light phases, dark phases are preferably provided by the control algorithm. The temporal sequence of the light and dark phases is advantageously carried out at such a speed that the human eye can no longer distinguish the phases and visually creates a mixed color for the viewer. The controller controls this z. Example, the driver for generating a drive pattern for driving the lighting means according to the control algorithm for a predetermined image. Thus, the control algorithm may assign at least one visually formed light at a predetermined intensity maximum to a predetermined image display portion of an image. The control algorithm can, for. B. by a current control of the bulb 9 be realized, whereby light of the first hue is emitted at a first time. Light with the second hue is emitted at a second time.

In 7 is an example of a first (schematic) block diagram for control of the escape sign light 1 (please refer 1 ). Blocks of the controller can be implemented both in terms of hardware and software. The controller includes a control signal notification device 100 , a display control interface 102 , a scheme 104 for the transmission switching element 11 (please refer 4 ), a regulation 106 as a driver for the bulbs (such as the bulbs 9 . 10 to 4 ) and a lighting ballast 108 , Influence is on the liquid crystal display 110 taken. About the control signal reporting device 100 a predefined data record for the display of an image is received or transmitted. The bulb ballast 108 drives the electricity that is needed for the bulbs. The display control interface 102 determines if a bulb is to be controlled. The data set defines an image by a predetermined selection of image display parts, a predetermined drive or setting of each of the image display parts, and the operating state of the lighting means. The display control interface 102 Controls the control according to this predefined data set 104 for the transmission switching element 11 , ie for the liquid crystal surface (acc 4 ), and the scheme 106 for the bulbs 8th and 10 at. The regulation 104 for the transmission switching element 11 turn the Display areas of the transmission switching element 11 according to the predefined image display parts in an operating state for switching or blocking. According to the switched operating states of the transmission switching element 11 and the control of the bulbs 8th . 10 will appear on the liquid crystal display 110 , and thus on the image display area 4 , a predefined image variation is displayed (similar to, for example, a negative image or a solid color image). Several image variations form the overall picture.

In 8th is an example of a schematic representation of a section of the electronics of the escape sign light 1 (see. 1 ), which is an addition to the first scheme, the block diagram according to 7 forms. The control comprises the elements 7 , wherein other elements of the lamp ballast 108 are switched on. It is an AC / DC converter 112 and an emergency light monitoring unit 114 to the bulb ballast 108 connected to the ballast 108 depending on a monitoring state of the emergency lighting monitoring unit 114 drive. Optionally, an emergency lighting system interface 116 and a display controller interface 118 be connected. This allows a direct exchange of information with an emergency lighting system to which the escape sign lamp belongs. Further, in self-contained lights optionally an error display unit 120 , a DC / DC converter 122 and a battery 124 be provided. All these components are advantageously arranged distributed in the escape sign lamp to ensure a flat design can.

In 9 By way of example, a third scheme is shown. The scheme is part of a control of the escape sign lamp 1 , The scheme can be integrated as a supplement to the first and possibly also to the second scheme in the escape route light. The control comprises the elements 7 and optional off 8th , where further elements of the display control interface 102 are switched on. It is a DC / DC converter 126 , an interface 128 for transmission switching element control 104 , an analogue control input 130 , a digital control interface 132 and a background scheme 134 to the display control interface 102 connected. Information about the backlighting of the escape sign luminaire can be processed with this control. A control signal can be calculated via the display control interface 102 for controlling the escape sign light 1 be made available to the bulbs. With the calculated control signal can thus influence the transmission switching element control 104 be taken that brightness and contrast of one using the liquid crystal display 110 generated image is adapted to the ambient brightness.

It can also be said that a escape route light 1 at least two, in particular alternately displayable, formed by light images such as directional pictograms by a controller 12 can generate, which is used to control a transmission switching element 11 is designed. The transmission switching element 11 is in front of a light room 8th arranged, by the light from at least one light source 9 is directed. The light source 9 is designed to produce a light of a first wavelength corresponding to a color valence of a base color of a color space or a color system. Through the controller 12 of the transmission switching element 11 can be a surface switching and / or blocking a light exit surface 14 of the light room 8th be made. As a result, the emission of at least one light of a further wavelength, which corresponds to a color valence of a second primary color of the color space or of the color system, occurs in order to produce a visually formed mixed color for producing at least one region of the image.

The records for the individual predetermined images may be from the control signal reporting means 100 z. B. be retrieved from a memory. In the memory, a plurality of records for predetermined images may be deposited, each of which should meet certain requirements for the escape route light. It can z. For example, several records may be combined into record packages that include multiple images. Ideally, the pictures correspond to at least one particular national standard. When providing the escape sign lamp for a specific country, the data set packet corresponding to that country can then be activated. Further data record packages for pictures according to other national standards may remain blocked. The datasets for the predetermined images may be updated in a conventional manner by computer assistance.

The emergency sign luminaire according to the invention has been illustrated in greater detail by means of an exemplary embodiment by means of the figures. Of course, it is also possible to further supplement this embodiment. For example, a light source can be used that can emit white light in addition to the primary colors. It is also possible that an additional light source with white light is used. By including white light, the hue of the visually formed light can be further influenced, for example, warmer hues can be produced. There may be a contrast adjustment between image display parts between each other and the environment of the escape sign light done.

As explained above, it is in one embodiment of a escape sign lamp according to the invention z. B. possible to equip the transmission switching element instead of the liquid crystal surface with two crossed polarizing filters. Likewise, it is possible to stack polarizing filters on a film base in addition to the liquid crystal surface. By different adjustment of the polarizing filter to each other, in turn, the light emerging from the light exit surface can be influenced in areas, as already described above.

The escape sign luminaire according to the present invention can be used for multiple mission territories, irrespective of the fact that they have different brightness, color tone or pictogram design requirements. Furthermore, the escape sign luminaire offers the possibility that it can be used to make escape route guidance simple and fast, since the display of mission statements can be changed in the shortest possible time.

LIST OF REFERENCE NUMBERS

1

 Signage

2

 casing

3

 frame

4

 Image display area

5

 housing case

6

 Case back

7

 Image display unit

8th

 clearance

9

 first light source

10

 second light source

11

 Transmission switching element

12

 controller

13, 13a, 13b

 Einkopplungsseite

14

 Light-emitting surface

15, 15 '

 boards

20, 21, 22

 Image display parts for current person

30, 31, 32

 Image display parts for arrow bars

40, 41, 42

 Image display parts for left arrow

50, 51, 52

 Image display parts for right arrow

60

 Rotansteuerung

61, 62, 63

 red light phases

70

 green control

71, 72

 green light phases

80

 blue control

81, 82

 blue light phases

90

 White control

91, 92, 93

 white light phases

100

 Control signal reporting device

102

 Display Control Interface

104

 Regulation for transmission switching element

106

 Regulation for bulbs

108

 Lamp ballast

110

 liquid-crystal display

112

 AC / DC converter

114

 Emergency Monitoring Unit

116

 Emergency lighting interface

118

 Display controller interface

120

 Error display unit

122

 DC / DC converter

124

 battery

126

 DC / DC converter

128

 Interface to the transmission switching element control

130

 analogue control input

132

 digital control interface

134

 Background control

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2902995 A1 [0009]
• DE 102014001371 A1 [0009]
• EP 1351206 B1 [0010, 0010, 0011]
• EP 2889848 A1 [0011]
• EP 2911141 A1 [0012, 0012]
• EP 1865484A1 [0013]
• DE 19545700 Al [0014]
• DE 102009060607 B4 [0015]
• DE 19631700 A1 [0018, 0018]
• DE 202007011542 U1 [0019]
• DE 202009018852 U1 [0020]

Cited non-patent literature

• DIN EN 1838 - 2013 [0004]
• DIN 4844-1: 2012-06 [0004]
• DIN ISO 3864 [0004]
• DIN ISO 3864-1 2012-06 [0004]
• DIN ISO 3864-2 2008 [0004]
• DIN ISO 3864-2 Corrigendum 1 2011-09 [0004]
• DIN ISO 3764-3 2012-11 [0004]
• BS 5266-1: 2011 [0004]

Claims (23)

Escape sign light ( 1 ), the at least two, alternately displayable, formed by light images with directional pictograms by a controller ( 12 . 15 ) used to control a segmented transmission switching element ( 11 ) is designed, on the basis of a beam path of a light space initially formed by a light guide ( 8th ) fed and passed through this light from at least one light source ( 9 ), wherein a coupling of the light into the light guide plate via a to a light exit surface ( 14 ) Angled Einkoppelungsseite ( 13 . 13a . 13b ) of the light space ( 8th ), wherein the lighting means ( 9 ) is designed as a first light source for generating light of a first wavelength at a first time, which corresponds to a color valence of a primary color of a color space or a color system, wherein the controller ( 12 . 15 ) of the transmission switching element ( 11 ) a surface switching through and / or blocking the light exit surface ( 14 ) of the light space ( 8th ) is effected at a second time, whereby a surface influence of the emission of at least one light of a further wavelength during the second time point is effected, which corresponds to a color valence of a second primary color of the color space or the color system, to a visually formed mixed color for producing at least one Region of the image, and wherein the color system or the color space comprises as a base color white light or a color set with a white tone. Escape sign light ( 1 ) according to claim 1, wherein furthermore at least two light sources ( 9 . 10 ), preferably within the escape sign lamp ( 1 ) are present, which, preferably with at least two different wavelengths, for coupling a light on the coupling side ( 13 . 13a . 13b ) of the light space ( 8th ) are aligned, wherein on the light exit surface ( 14 ) preferably the transmission switching element ( 11 ) is arranged. Escape sign light ( 1 ) according to claim 2, further comprising the controller ( 12 . 15 ) for taking at least two operating states of the escape sign lamp ( 1 ), the operating states being characterized by a state of at least one light distribution means, such as a driver ( 12 ) for generating a driving pattern of the lighting means ( 9 . 10 ) or as in a switching state of the transmission switching element ( 11 ) differ. Escape sign light ( 1 ) according to any one of the preceding claims, further comprising the controller ( 12 . 15 ) for an area-wise transmission setting, such as switching-through or blocking, of the transmission switching element ( 11 ) is designed on the basis of at least one parameter of a lightwave front, such as a wave spectrum or a polarization of the light wavefront. Escape sign light ( 1 ) according to one of the preceding claims, wherein furthermore the at least one lighting means ( 9 ) is designed such that a plurality of intensity maxima, wherein each intensity maximum is caused by a wave spectrum, complement each other to form light of a hue of the image, in particular a white hue. Escape sign light ( 1 ) according to one of the preceding claims, wherein furthermore the at least one lighting means ( 9 ) is designed to emit light from a set of different shades, in particular from a set of three to six different shades, wherein preferably the set comprises all primary colors of the color system. Escape sign light ( 1 ) according to claim 6, wherein furthermore the set of different hues comprises a white hue. Escape sign light ( 1 ) according to one of the preceding claims, wherein furthermore a light source ( 9 ; 10 ) is provided by a light strip, in particular of a plurality of LEDs, such as an LED strip, which along a Einkopplungsseite ( 13 . 13a . 13b ) is arranged. Escape sign light ( 1 ) according to one of the preceding claims, wherein furthermore at least one image display part ( 20 . 21 . 22 ; 30 . 31 . 32 ; 40 . 41 . 42 ; 50 . 51 . 52 ), which preferably has a partial region of the transmission switching element ( 11 ), a beam path of a light from the light source ( 9 . 10 ) is arranged upstream. Escape sign light ( 1 ) according to claim 9, wherein furthermore the transmission switching element ( 11 ) is formed by a liquid crystal surface, preferably in a plurality of image display parts ( 20 . 21 . 22 ; 30 . 31 . 32 ; 40 . 41 . 42 ; 50 . 51 . 52 ) is divided. Escape sign light ( 1 ) according to one of the preceding claims, wherein furthermore the transmission switching element ( 11 ) comprises at least two polarizing filters overlapping one another, at least one of which is switchable, and which preferably has at least one surface or surface section of the light exit surface ( 14 cover). Escape sign light ( 1 ) according to claim 11, further comprising a vertical component of a light with a first polarizing filter and a horizontal component of a light with a second polarizing filter is absorbable or filterable. Escape sign light ( 1 ) according to any one of the preceding claims, further comprising the controller ( 12 . 15 ) is an electronic control, which in particular distributed in the escape sign lamp ( 1 ) arranged with a part of the transmission switching element ( 11 ), wherein preferably the transmission switching element ( 11 ) is a liquid crystal surface. Escape sign light ( 1 ) according to any one of claims 9 to 13, wherein further one of the images formed by light is defined by a predetermined selection of image display parts and a predetermined drive or setting of each of the image display parts by the controller ( 12 . 15 ). Emergency exit luminaire according to one of claims 9 to 14, wherein furthermore to the control ( 12 . 15 ) a memory in which at least two, preferably more than two, images are stored, which are provided by data for controlling or setting the transmission switching element ( 11 ), in particular the image display parts of the transmission switching element ( 11 ), and the operating state of at least one of the lighting means ( 9 ; 10 ) are defined. Emergency exit luminaire according to one of the preceding claims, wherein the control system ( 12 . 15 ) comprises a control algorithm, according to which in a light phase ( 61 ; 71 ; 81 ) a light having an intensity maximum of a hue, in particular a base color, is emitted and a sequence of light phases of different shades, in particular of the primary colors, is provided. Emergency exit luminaire according to claim 16, further comprising between two light phases ( 61 . 62 ; 61 . 71 ) is a dark phase. An escape sign lamp according to claim 16 or 17, further comprising a duration of a light phase ( 61 ; 71 ; 81 ) is less than 10 msec, in particular less than 6 msec. Emergency exit luminaire according to one of claims 9 to 18, wherein furthermore the control ( 12 . 15 ) comprises a control algorithm, according to which a predetermined image display part is assigned at least one light in a predetermined intensity maximum. Escape lamp according to claim 19, where continues the control algorithm is designed for a control of different, predetermined image display parts by a modulation, in particular by means of a pulse width modulation (PWM). Emergency exit luminaire according to one of claims 2 to 20, wherein furthermore the control ( 12 . 15 ) comprises a control algorithm, according to which a current control of the luminous means ( 9 ) takes place, whereby light of a predetermined hue is emitted at a first intensity maximum, in particular at a first time, and light is emitted at a second intensity maximum, in particular at a second time. Escape lamp according to one of claims 9 to 21, where continues the controller comprises a control algorithm for adjusting a contrast of a white tone and / or a color tone in connection with a passage through an image display part, in particular by at least two image display parts, in particular of two image display parts, which are for generating a single photoimage representation in a mutually comparable state. Escape lamp according to one of the preceding claims, where continues the controller comprises a control algorithm for adjusting a contrast of a white tone and / or a hue between a representation of the picture of the escape sign lamp and an illumination of an ambulance luminaire environment.

Images