Light control device, system for adapting luminosity depending on ambient light, use of such a system, and computer programme

Abstract

The invention relates to a light control device for adapting luminosity depending on ambient light for a display device which has at least one pixel technology-based display panel for displaying changing motifs, said display panel having a plurality of separately actuatable display pixels. The invention also relates to a system for adapting luminosity depending on ambient light for a display device which has at least one pixel technology-based display panel for displaying changing motifs, said display panel having a plurality of separately actuatable display pixels. The invention also relates to the use of such a system and to a computer programme for a light control device.

Description

[0001] Light control device, system for ambient light-dependent luminosity adjustment, use of such a system and computer program

[0002] The invention relates to a light control device for ambient light-dependent luminance adjustment for a display device having at least one pixel-based display field for displaying changing motifs, which has a plurality of separately controllable display pixels. The invention also relates to a system for ambient light-dependent luminance adjustment for a display device having at least one pixel-based display field for displaying changing motifs, which has a plurality of separately controllable display pixels. The invention also relates to the use of such a system and a computer program for a light control device.

[0003] Specifically, the invention relates to a “non-LTE” light control device, a system for ambient light-dependent luminance adjustment, the use of such a system, and a “non-LTE” computer program.

[0004] From WO 2020 / 2106687 A1, the proposal is known to attach a pixel technology display field to a commercial vehicle body to display changing motifs, e.g. to display advertising information on the commercial vehicle.

[0005] The invention is based on the object of further optimizing the control of the light emission of such a pixel-based display panel and opening up additional advantageous areas of application. In particular, the objective is to control the display brightness of the display device in real time, i.e., simultaneously with the ambient brightness, depending on the mobility of the object on which the display device is installed.

[0006] This object is achieved by a light control device for ambient light-dependent luminosity adjustment for a display device, e.g. for displaying information in public spaces, which has at least one pixel-based display field for displaying changing motifs, which has a multiplicity of separately controllable display pixels, wherein the light control device is set up to evaluate at least one ambient light measured value from at least one ambient light sensor and to operate the display field at any time as a non-lighting device (non-LTE) in the sense of road traffic law depending on the at least one ambient light measured value by controlling the light emission of the display field.Such a lighting control device can reliably ensure that the display result of the pixel-based display panel, generated and produced by adjusting the luminance, gives the human observer the impression of "not illuminating" or at least "not clearly illuminating." In such a case, the pixel-based display panel, controlled by the lighting control device, can be used without special approval formalities, for example, on vehicles and in areas close to roads. The pixel-based display panel is then not considered a signal light. Accordingly, the lighting control device can also be referred to as a "non-LTE" lighting control device.

[0007] The lighting control device can be configured to evaluate at least several ambient light measurements per second from at least one ambient light sensor and, depending on the at least several ambient light measurements per second, to control the display by controlling the light emission of the display panel in the manner described above. This ensures particularly reliable results that the display result generated and produced by the luminance adjustment creates the impression "not illuminated" or at least "not clearly illuminated" in terms of visual perception for the human observer.

[0008] The pixel-based display field, e.g. in the form of an outdoor advertising display, with the explained luminance adjustment, provides a display technology that is easy to change motifs and is suitable for displaying basically any changing motifs and can generate, allow and / or ensure lettering-like motif changes and / or typographic displays.

[0009] The pixel-based display panel can be implemented, for example, as a display or as a display network with individual display pixels or cells. The display panel or the arrangement of the display pixels can, for example, have a rectangular shape. The display pixels can be arranged in a matrix distributed over the surface area of ​​the display panel.

[0010] The display field or the arrangement of the display pixels can, for example, have a rectangular shape. The display pixels can be arranged in a matrix distributed over the surface area of ​​the display field. Furthermore, the task is solved with at least one high-performance light sensor that measures the ambient light several times per second. This is particularly suitable for real-time, simultaneous luminance adjustment of the external display and ensures the "non-LTE" display result.

[0011] By combining a non-LTE light control unit and a high-performance light sensor with multiple ambient light measurements per second, a light control technology is achieved and made available for the first time that ensures real-time, traffic-safe ambient light-relative exterior display control.

[0012] The inventive step in WO 2020 / 2106687 A1 is the non-LTE as such. The non-LTE is a light-emitting technology that emits less than +0.5 cd / m 2 or maximum +0.5 cd / m 2 to the relative ambient light, displays changing motifs on display screens simultaneously in real time.

[0013] The light control device can be designed as a "non-LTE" light control device and can be configured to switch on the display device and / or the luminosity adjustment by means of a "non-LTE" computer program when a first daylight threshold is exceeded and to switch it off when a second daylight threshold is undershot.

[0014] Another relevant value is the daylight threshold, which can be 1,000 lux, for example.

[0015] The non-LTE light control device according to the invention can include both: the luminance limit of +0.5 cd / m 2and the daylight threshold of 1,000 lux; below 1,000 lux, the external display remains off (no display); above 1,000 lux, the external display is activated; with a maximum of +0.5 cd / m 2 compared to the ambient light, so that the display luminance in this example is at least 1,000.5 cd / m 2 Instead of the value of 1000 lux, another suitable daylight threshold can be used.

[0016] According to an advantageous embodiment of the invention, the light control device is designed to switch on the luminosity adjustment, i.e. the ambient light-dependent control of the light emission of the display panel, when a first daylight threshold value is exceeded and to switch it off when a second daylight threshold value is undershot. The first daylight threshold value can be, for example, 1,000 lux, but it can also be a lower value of 500 lux or 750 lux. The first daylight threshold value can in particular be in the range from 400 lux to 1,100 lux. The second daylight threshold value can be equal to the first daylight threshold value or, in order to implement hysteresis during switching, be smaller than the first daylight threshold value by a difference value. The difference value can be, for example, 10 lux, or in the range from 10 lux to 50 lux.

[0017] According to an advantageous embodiment of the invention, the light control device is configured to generate the control signals to be output to control the light emission of the display panel by continuously calculating, e.g. in real time, the ambient light measured values ​​from at least one ambient light sensor with a relative luminous threshold value, and thereby ensure that the entire display panel or one or more parts thereof appear non-luminous depending on the ambient light. In this way, the light control device can ensure that the display panel is not perceived as "luminous" in the human visual perception. The luminous threshold value can be stored in the light control device, for example, as a fixed or adjustable parameter. Multiple luminous threshold values ​​can also be stored, e.g. for different luminous intensity ranges or brightness ranges of the ambient light.

[0018] According to an advantageous embodiment of the invention, it is provided that the light control device is designed to limit the light emission of the display panel by means of the output control signals, so that the light emission of the display panel is less than or at most +0.5 cd / m 2 compared to the averaged relative ambient light. This limits the intensity of the light emission to a level that can be readily accepted in road traffic, particularly without special approval procedures. In particular, the display panel, although self-luminous, can be classified as a non-light-technical device, meaning that approval as a light-technical device is not required.

[0019] The luminance limit formula used for this in the light control device is "lim DMCM-LTE = d + 0.5 cd / m1". The formula components of the "non-LTE" luminance limit formula "lim DMCM-LTE" for the "non-LTE" light control device for "non-LTE" outdoor displays are a) >lim D< for the ambient light-relative luminance limit, b) >d< for the relative ambient luminance, and c) >ÜNon-LTE < for the ambient light-relative non-LTE luminance. According to an advantageous embodiment of the invention, at least one light sensor is present per side of a device equipped with a display panel, which, for example,is installed parallel to the main light emission axis of the display panel on the same side of the device so that the lighting control device can be supplied with the ambient light data relevant to the device system and can thus adapt the light emission of the display panel according to the ambient light relevant for the perception of the display panel.

[0020] According to an advantageous embodiment of the invention, the light control device is configured to convert the ambient light measured values ​​from the at least one ambient light sensor into the control signals to be output using a degressive or hyperbolic characteristic curve, with which the ambient light measured values ​​can be converted degressively or hyperbolically into absolute light emission values ​​of the display panel or into relative luminance values ​​of the display panel. Such a degressive or hyperbolic characteristic curve allows the light control characteristic to be particularly well adapted to human visual perception. For example, the degressive characteristic curve can be designed in such a way that a light emission value in cd or cd / m 2is determined as a function of an ambient light value measured in lux. For small input values, relatively large output values ​​of the characteristic curve are determined, while for larger input values, relatively smaller output values ​​are determined (degressive characteristic). The characteristic curve can be implemented, for example, as a conversion formula stored in the lighting control unit, or in the form of a table of several conversion values ​​that represent, so to speak, interpolation points of the characteristic curve. Linear or non-linear interpolation can be carried out between these interpolation points, e.g. using the spline method. For example, the lighting control unit can determine the respective relative luminous limit value from this degressive or hyperbolic characteristic curve.

[0021] The invention therefore makes it possible to provide a lighting display device which is considered “non-luminous” within the meaning of traffic guidelines. This is the case if the luminosity of the display device does not exceed 0.5 cd compared to the ambient light of, for example, 0.0 lux or 0.0 cd; in this example, therefore not more than 0.5 cd. The luminosity limit of 0.5 cd is the luminosity limit at absolutely dark night, usually measured in a light laboratory. During the day, a luminosity limit at 10,000 lux ambient light could then apply to a linearly scaled luminosity limit of 10,000.5 cd. However, this has proven to be too bright in practice, so the inventor conducted his own parameter determination in the sense of basic research in order to determine suitable luminosity limit values ​​for various ambient light situations during daylight and twilight, so that the visual perception of “not luminous” is maintained.The determined luminous limit values ​​during the day and at dusk are not linear and, in terms of light measurement, are significantly below the applicable limit of +0.5 cd.

[0022] According to an advantageous embodiment of the invention, it is provided that the light control device is configured to convert the ambient light measurement values ​​from at least one ambient light sensor into the control signals to be output by means of one, several or all of the following assignments: the luminous threshold value is approximately 10.5 cd / m at 100 lux ambient light 2 , the luminous limit is approximately 14.2 cd / m at 120 lux ambient light 2 , the luminous intensity limit is approximately 45.9 cd / m at 320 lux ambient light 2 , the luminous intensity limit is approximately 169.6 cd / m at 500 lux ambient light 2 , the luminous limit is approximately 175.2 cd / m at 550 lux ambient light 2 , the luminous limit value is approximately 238.0 cd / m at 1000 lux ambient light2 , the luminous limit is approximately 400.0 cd / m at 2000 lux ambient light 2 , the luminous limit value is approximately 1238.0 cd / m at 3000 lux ambient light 2 , the luminous limit is approximately 1400.0 cd / m at 5000 lux ambient light 2 , the luminous limit value is approximately 2238.0 cd / m at 10000 lux ambient light 2 , the luminous limit value is approximately 2400.0 cd / m at 20000 lux ambient light 2 , the luminous intensity limit is approximately 3238.0 cd / m at 30000 lux ambient light 2 , the luminous limit is approximately 4250.0 cd / m at 38381 lux ambient light 2 , the luminous limit is approximately 4400.0 cd / m at 41000 lux ambient light 2 , the luminous intensity limit is approximately 5500.0 cd / m at 50000 lux ambient light 2 , the luminous limit is approximately 8500.0 cd / m at 75000 lux ambient light 2 , the luminous limit value is approximately 10500.0 cd / m at 90000 lux ambient light 2, the luminous intensity limit is approximately 11500.0 cd / m at 100000 lux ambient light 2 The luminous limit value is approximately 12500.0 cd / m at 110000 lux ambient light 2 .

[0023] In this way, a specific degressive characteristic curve of the type described above can be realized with individual support points. As mentioned, interpolation can be performed if ambient light values ​​occur between the support points.

[0024] According to an advantageous embodiment of the invention, the light control device is configured to limit the change in the control signals for controlling the light emission of the display panel to a first transition gradient during a transition of the ambient light from light to dark, by means of which the light emission of the display panel is gradually reduced to a value corresponding to the darker ambient light. The first transition gradient ensures that even during a very rapid transition of the ambient light from light to dark, e.g., when a vehicle enters a tunnel, a gradual reduction in the light emission of the display panel is carried out. In particular, a transition that is pleasant for human perception can be realized.

[0025] According to an advantageous embodiment of the invention, the light control device is configured to limit the change in the control signals for controlling the light emission of the display panel to a second transition gradient when the ambient light transitions from dark to light, by means of which the light emission of the display panel is gradually increased to a value corresponding to the brighter ambient light. This makes it possible to achieve a gradual increase in the light emission of the display panel even when the ambient light transitions relatively quickly from dark to light, e.g. when driving out of a tunnel. This makes it possible, in particular, to take into account the fact that the human eye also becomes accustomed to such brightness transitions with a temporal gradient.

[0026] It is also advantageous if the light control device is set up to adapt the change in the control signals for controlling the light emission in the sense of a luminosity adjustment of the display field more slowly overall and / or more slowly depending on the speed to the relative ambient light-dependent luminous limit value than simultaneously in real time, so that the human observer who is still in the darker area as a following road user does not suddenly or flashily see something bright displayed on the vehicle's external display.

[0027] The first transition gradient and / or the second transition gradient can be a linear or non-linear gradient over time, in the sense of a continuous transition function. The first and / or the second transition gradient merely limits the speed at which the luminosity of the display panel changes. If the actual transition of the ambient light from light to dark or dark to light is already slower than the corresponding transition gradient, no limitation occurs.

[0028] In general, it is advantageous if the luminosity adjustment is linear, uniform and / or step-wise. According to an advantageous embodiment of the invention, the first transition gradient is greater than the second transition gradient. This has the advantage that a particularly efficient adaptation of the light emission control to the properties of human perception can be realized. Because the first transition gradient is greater than the second transition gradient, the light emission is reduced relatively quickly during the first transition of the ambient light. During the second transition, the light emission is increased only relatively slowly. For example, the first transition gradient can be at least twice as large as the second transition gradient, or at least three times as large or at least five times as large.

[0029] According to an advantageous embodiment of the invention, the light control device has a computer, wherein the light control device is configured to execute a computer program on the computer and thereby control the light emission of the display panel. This has the advantage that the previously explained control functions of the light emission can be implemented by appropriate programming of the computer program. In particular, this also allows flexible adaptation of the control functions by simply changing the computer program. The hardware of the light control device does not usually have to be changed for this purpose. Alternatively, the light control device can also incorporate the described control functions of the light emission by implementation using hardware components, e.g., by implementing the control functions on an FPGA (Field Programmable Gate Array).

[0030] According to an advantageous embodiment of the invention, it is provided that the computer program and / or the data used by the computer program can only be changed after authorization and / or not by remote access. This ensures a high level of security for the functions of the lighting control device against unauthorized manipulation. In particular, the lighting control device with the functionality of controlling the light emission, e.g. by means of the computer program or an app, can only be accessible to authorized persons. In particular, remote access via wireless data connections is thereby prevented. For example, the lighting control device can be designed such that changes to the computer program and / or the data are only possible by means of a wireless short-range transmission, e.g. Bluetooth, NFC or similar, or by connecting a cable connection. Password protection can be implemented for authorization, for example.

[0031] According to an advantageous embodiment of the invention, the light control device is protected against unauthorized access by at least one sealing element. In this way, the light control device can be even better protected against unauthorized modifications. The sealing element can, for example, provide a mechanical seal for the light control device, e.g., in the form of a lead seal. A lock can also be present as the sealing element. Furthermore, it is advantageous if the light control device has a mechanically stable housing, e.g., a metal housing.

[0032] The object mentioned at the outset is also achieved by a system for ambient light-dependent luminosity adjustment for a display device which has at least one pixel-based display field for displaying changing motifs, which has a plurality of separately controllable display pixels, wherein the system has at least one light control device of the type explained above, at least one ambient light sensor connected to the light control device and the at least one pixel-based display field, e.g. for displaying outdoor advertising or other public information.

[0033] This also allows the previously explained advantages to be realized.

[0034] According to an advantageous embodiment of the invention, the display technology of the display panel is light-emitting or non-light-emitting, or backlit or illuminated. In particular, the display panel can have reflective display pixels.

[0035] According to an advantageous embodiment of the invention, the ambient light sensor and the light control device are a single unit in terms of information technology and / or are designed as a single module in terms of device technology. This allows the system to be provided in a manner that is easy to handle for the user and also tamper-proof. The light control device and the ambient light sensor can, for example, be housed entirely in one housing.

[0036] According to an advantageous embodiment of the invention, the ambient light sensor and / or the light control device form a structural unit with the at least one pixel-based display panel. This provides an overall system that is easy to use for the user and already includes the pixel-based display panel. The pixel-based display panel can be controlled by the light control device directly or indirectly via a pixel controller (item 3).

[0037] In an advantageous embodiment of the invention, the system has at least one ambient light sensor with a diffuse lens and at least one ambient light sensor with a clear lens. To generate optimal luminance for the display panel, the ambient light values ​​of the at least one ambient light sensor with a diffuse lens and the ambient light values ​​of the at least one ambient light sensor with a clear lens are calculated to produce a resulting ambient light value, for example, by the light control device. This resulting ambient light value is then used to control the light emission of the display panel. The respective light sensor surface of the at least one ambient light sensor with a clear lens and / or the at least one ambient light sensor with a diffuse lens can be positioned parallel to the display surface of the display panel or differently.

[0038] The object stated at the outset is also achieved by the use of a system of the type explained above for displaying advertising information and / or other information in public areas, in particular on vehicles on generally accessible traffic routes, in parking lots and / or near roads, and / or on fixed devices. This also makes it possible to achieve the advantages explained above. In particular, the system can also be used near roads, i.e. not directly on traffic routes. The system can, for example, be used near roads in an area of ​​up to 10 m beyond a traffic route or up to 20 m beyond a traffic route. For example, the area near the road can be at a distance of at least 2 m or at least 5 m from the traffic route.

[0039] The system can be used, for example, with the display direction "outwards" on or in all types of vehicles for the transport of goods and heavy loads, but also on or in vehicles for the transport of people - such as trucks, buses, trams, trailers, bicycles, rickshaws, scooters, local and / or long-distance trains, delivery vans, mobile homes, sports trailers, animal transport trailers, or load carriers attached to these vehicles, such as roof racks, bicycle racks and the like.

[0040] The system can, for example, be deployed or used in road traffic and areas adjacent to road traffic, such as parking bays and lanes, car parks and vehicle parking areas of companies, petrol stations or rest areas, as well as green spaces and other areas near intersections with and without traffic lights, sidewalks and pedestrian zones, as well as areas where, in addition to pedestrians, bicycles, skateboards and electric motor-powered means of transport are and / or may be used. The system can, for example, be used on scaffolding, displays, pylons and cranes of all kinds, as these can also be used near roads and pedestrian areas, as they can also be used near roads, pedestrian areas and other traffic areas such as car parks of supermarket centers.

[0041] The aforementioned object is also achieved by a computer program for a lighting control device of the type described above, wherein the computer program is configured to at least control the brightness of the light emission of the display panel when the computer program is executed on a computer of the lighting control device. This also allows the previously explained advantages to be realized. The computer program can execute one, several, or all of the previously explained lighting control functions of the lighting control device. The computer program can be implemented, for example, as software or an app. In particular, the computer program can be implemented as a "non-LTE" computer program.

[0042] The display panel can be configured as a black-and-white or grayscale display panel. In this case, the individual display pixels can be monochrome and thus only controlled between the light / dark states.

[0043] According to an advantageous embodiment of the invention, the display panel is designed as a color display panel for displaying colored motifs. In this way, the display panel can be used much more universally than with a pure black and white or grayscale display. In particular, all possible motifs can be represented better. To display colored motifs, the display panel can, for example, have display pixels in different colors, e.g., according to the RGB color scheme or color system, or preferably the CMY or CMYK color scheme or color system. In particular, the display panel can be designed as a color display panel with CMY or CMYK electrowetting technology.

[0044] According to an advantageous embodiment of the invention, the display panel is designed as a light-emitting display panel. The display panel is then designed to be self-luminous. This has the advantage that the motifs on the display panel can be displayed much more clearly and with improved contrast, even in daylight. In particular, with a color display, the brilliance of the display can be significantly improved. Furthermore, the light-emitting display panel could also be used in the dark, if necessary. According to an advantageous embodiment of the invention, the display panel has a backlight to increase the contrast of the display pixels and / or self-luminous display pixels. Different technologies can be used to implement the display pixels, preferably electro-wetting technology (also called e-wetting for short).The individual display pixels can, for example, be designed as LEDs or SMDs if they are designed as self-luminous display pixels.

[0045] According to an advantageous embodiment of the invention, the pixels of the display panel are translucent. This has the advantage that the display panel thus complies with the reprographic standards of the 20th and 21st centuries, particularly in digital printing, offset printing, and inkjet printing, thus achieving and ensuring maximum color brilliance with the least possible print-graphic effect of so-called "muted" colors. Muted colors are colors mixed or blended with black; this creates the impression of darkened color or colored dirtiness.

[0046] According to an advantageous embodiment of the invention, the pixel pitch of the display pixels of the display field is at least 1 mm, or at least 2.5 mm, or at least 4 mm. The pixel pitch of the display pixels is thus selected to be comparatively large, which has the advantage for the display of motifs outdoors that these can be perceived as pleasant by viewers from the desired distance, e.g. from a viewing distance of approximately 2.5 m or approximately 5 m. In addition, this prevents viewers from wanting to view the displayed motif from a shorter viewing distance. Due to the pixel pitch, meaningful perception of the motif is no longer possible at shorter viewing distances.

[0047] According to an advantageous embodiment of the invention, the display panel is preferably used for static, non-dynamic motifs or typographic images. Furthermore, the advantageous embodiment also includes the fact that the alternating sequence itself does not generate any dynamic image effects, so that neither following traffic or following road users nor other road users can be distracted from traffic by dynamic display content or effects.

[0048] According to an advantageous embodiment of the invention, it is provided that the display panel has a surface area of ​​at least 0.25 m 2 , 0.5 m 2 or 1 m 2 Accordingly, the display pixels of the display panel occupy at least the mentioned area of ​​at least 0.25 m 2 , 0.5 m 2 or 1 m 2. The present invention thus relates to the field of a non-lighting device (non-LTE) for displaying changing motifs. The invention also relates to a special control device, namely the aforementioned light control device, for a non-lighting device for displaying changing motifs. The invention is particularly suitable, among other things, for a commercial vehicle body with an integrated display comprising at least one such device, as well as for a load carrier body for buses of all types. Furthermore, the invention relates to light-emitting display displays of all types and backlit display surfaces that are used in road traffic and areas adjacent to road traffic, such asin parking bays and lanes, parking lots and vehicle parking areas of companies, gas stations, or rest areas, as well as green spaces and other areas near intersections with and without traffic lights, sidewalks, and pedestrian zones, as well as areas where, in addition to pedestrians, bicycles, skateboards, and electric motor-powered vehicles are and / or may be used. Furthermore, the invention relates to scaffolding, erectors, and cranes of all kinds, as these can also be used near roads and in pedestrian areas.

[0049] The present invention is intended to help prevent accidents in road and pedestrian traffic by helping to avoid the intrusive, distracting visual perception effect of advertising and other display motifs for viewers and road users of all kinds through the unobtrusive display type of the non-LTE.

[0050] According to an advantageous embodiment of the invention, a non-LTE is defined as a light-emitting or non-light-emitting display device with a luminous value of less than +0.5 cd / m 2 (candelas per square meter) compared to the cumulative relative ambient light. In particular, a non-LTE device ensures that the visual perception of "illumination" does not occur. A non-LTE device can have a high-performance ambient light sensor with an attached light control unit that generates non-LTE output data by calculating the photometric input data from at least one ambient light sensor. This ensures visual display values ​​on the display that resemble or are equivalent to the visual impression of a high-quality digital print on paper, film, tarpaulin, or mesh fabric.

[0051] In one advantageous embodiment, the present invention generally relates to display devices for changing motifs for vehicles, such as trucks, as well as trailers, semi-trailers, load carrier bodies for buses, and in particular to vehicle bodies and attachments with communication technology-based side, roof, and rear end devices. In one advantageous embodiment, the present invention particularly relates to vehicles used for the transport of goods and heavy loads, but also for the transport of people, including trains, taxis, and shuttles of all kinds.

[0052] As far as the application of the non-LTE (non-lighting device of vehicles) with the "non-LTE" light control device in vehicles is concerned, the invention represents the further development of the invention described in the PCT application WO 2020 / 2106687 A1 by Andreas Weihmann, e.g. with regard to software or apps for the luminosity adjustment of the pixels of the display field as well as for the color contrast adjustment of the pixels of the display field as well as for the color adjustment of the pixels of the display field, which can be implemented as a software of the "non-LTE" light control device.

[0053] As already listed in the introduction, the areas of application of the system within the scope of the present invention include, among others, all truck or trailer bodies such as commercial vehicle bodies, trailer bodies and all other bodies which are usually provided at the rear with a tarpaulin, a rolling door, a flap, a platform or a two- or multi-leaf door, as well as commercial vehicles of all kinds for the transport of persons.

[0054] A commercial vehicle body is generally referred to as a body for commercial vehicles, e.g., a body in the cargo area or loading area. Depending on the type of commercial vehicle, the body can include side, roof, and / or rear walls and / or flexible tarpaulins. Commercial vehicles include, for example, trucks (lorries) and their trailers or semi-trailers, as well as other vehicle trailers of all kinds, buses of all kinds, and trams of all kinds. The present invention also relates to load carrier bodies for buses of all kinds that are structurally integrated or retrofitted to designated load carrier eyelets at the rear of buses.

[0055] The ambient light sensor or high-performance measuring sensor measures the ambient light at least once per second, but preferably ten times or more per second, so that real-time simultaneity in measurement and control technology is achieved or guaranteed.

[0056] The "non-LTE" light control unit can be operated with special software or an app. This software calculates the ambient light measurement data from the ambient light measurement sensors with the luminous threshold data from the luminous threshold values ​​determined in our own basic research, for example, for a light-emitting SMD display technology, and individually controls the connected display panel with the corresponding display data (output). The SMD display panel used in the aforementioned basic research to determine the luminous threshold values ​​during daytime and at dusk had a pitch of 2.5 mm.

[0057] The ambient light sensor and the light control unit can represent a single unit in terms of information processing technology and / or form an assembly. Furthermore, the light control unit may be integrated into the housing of the ambient light sensor through miniaturization, thus eliminating the need for a housing for the light control unit.

[0058] According to an advantageous embodiment of the invention, the pixel-based display panel is equipped with or connected to a computer. The computer can control the individual pixels of the display panel, i.e., the representation of a motif on the display panel and a change between different motifs. If the computer is not part of the display panel, it can, for example, be attached to the component of the commercial vehicle body or be integrated into it. The computer can also be arranged separately on the commercial vehicle. The computer can be connected to a remote data transmission device via which the computer can remotely receive control commands and / or signaling data containing the motifs to be displayed on the display panel. The control commands can, for example, be used to remotely control the change of motifs. For this purpose,It is provided that remote data transmission tunnels that are secure against unauthorized access are used, operator-active and / or device-active, between the data-controlling and data-sending operator and the data-receiving computer. The computer can be designed as a commercially available personal computer (PC), e.g. a mini-PC. Advantageously, the on-board computer can be switched on and / or off independently of personnel or automatically, thus preventing the vehicle battery from having insufficient power to start the vehicle and / or transport-relevant units such as refrigeration units from having insufficient power. The computer can also be described as a signage computer. Advantageously, the signage unit is separated from the computer's operating system to ensure that only signage data is shown on the display panel.For this purpose, the computer advantageously has an integrated or connected signage player and / or an integrated or connected router with an integrated or connected SIM card reader or interface including a SIM card, with or without an active SIM card communication contract, or an alternative location-independent, non-hardware-connected communication option between the data or signage-managing operator and the computer. For the most secure and trouble-free signage operation possible, functional aggregate modules for the computer, player, and router are preferably provided; routers with an integrated SIM card slot have established themselves on the market independently of signage applications.

[0059] In order to generate suitable data that regulates the pixel luminosity, according to an advantageous embodiment of the invention, a special software or app ensures the luminosity adjustment of the pixels of the display panel so that the pixels with less than 0.5 cd / m 2 Light emission can be controlled relative to the ambient light.

[0060] In order to generate suitable data that regulates the pixel color contrasts, according to an advantageous embodiment of the invention, it is provided that a further special software or app ensures the color contrast adjustment of the pixels of the display panel, so that the pixels generate colors according to the relative ambient light conditions in such a way that the pixels, on the one hand, have less than 0.5 cd / m 2 compared to the ambient light, and on the other hand, colors are generated that neither achieve a signaling effect nor unavoidably distract from traffic.

[0061] Likewise, in order to generate suitable data regulating the pixel colours, according to an advantageous embodiment of the invention, it is provided that a further special software or app ensures the colour adaptation of the pixels of the display panel, that the pixels generate colours according to the relative ambient light conditions in such a way that the pixels, on the one hand, have a brightness of less than 0.5 cd / m 2 compared to the ambient light, and on the other hand, colors are generated that neither achieve a signaling effect nor unavoidably distract from traffic.

[0062] Regarding the software or apps for adjusting the brightness of the pixels of the display panel as well as for adjusting the color contrast of the pixels of the display panel as well as for adjusting the color of the pixels of the display panel, it is advantageous to use only one software or app or fewer than three software or apps.

[0063] The invention makes it possible to provide a commercial vehicle body whose rear door can be opened as fully as possible even in confined spaces, and which results in lower costs during production, particularly for the labeling and changing of the labeling on the rear door, but also on the side walls - regardless of whether they are tarpaulins, boxes, or other bodies - at least cumulatively over the entire service life of the truck and / or trailer or their bodies. In the context of this application, the term "display" refers to any communication technology display surface and / or technology that is not analogue but digital in terms of labeling; e.g., LED, electrowetting, and other, particularly future, visualization technologies that structurally tend to be pixel-based in nature.

[0064] The recipient's impression should be as similar as possible to that of conventional signage using analog lettering, especially with regard to luminous intensity. Digital commercial vehicle body lettering using a display is intended to replace the usual lettering on the rear, roof, and / or side walls as far as possible and should under no circumstances generate a signaling effect in the sense of vehicle lighting and / or marking.

[0065] The commercial vehicle body display, for example, integrated on the rear, roof or side walls should therefore ensure contrasts depending on the ambient light, which, in terms of the superficial recipient impression, is confusingly similar to or comes close to the impression of conventional analogue lettering, for example.

[0066] For the purposes of this patent list, "display" refers to any communication technology display surface and / or technology that is not implemented in an analog manner in terms of labeling, but rather, for example, a digital LED, e-wetting, and / or other, including future, visualization technology that is structurally and / or tends to be pixel-based in nature. Such a pixel-based display network or display serves to generate graphic and / or typographic information and can feature a modular system architecture—such displays can therefore be single-part and / or multi-part.

[0067] The invention will be explained in more detail using exemplary embodiments and drawings.

[0068] Figure 1 shows the components of a system for ambient light-dependent luminosity adjustment,

[0069] Figure 2 shows the data flow in the system according to Figure 1 ,

[0070] Figure 3 Traffic zones for the use of a system according to Figure 1 ,

[0071] Figure 4 Possible uses of the system according to Figure 1 in the individual traffic zones. The system shown in Figure 1 for ambient light-dependent luminance adjustment includes, as components that together form a non-LTE, for example at least one ambient light sensor (item 2), a light control device (item 1), a pixel controller (item 3), and a pixel-based display field (item 4). The components mentioned can each be designed as structurally separate components or can be fully or partially structurally integrated with one another. For example, the ambient light sensor (item 2) and the light control device (item 1) can form a single structural unit. In addition, the pixel controller (item 3) and the pixel-based display field (item 4) can form a single structural unit. The components mentioned can also form a common structural unit (item 8).

[0072] The pixel controller (item 3) can form a display device with the pixel-based display panel (item 4). The pixel controller (item 3) is used to control the individual display pixels of the display panel (item 4), both in terms of brightness and any color display that may be present. The system shown in Figure 1 can be connected to a motif player, which is not shown in Figure 1. Using the motif player (item 5), the motifs to be shown on the pixel-based display panel (item 4), i.e., images and / or text, can be provided in a defined format and transferred to the pixel controller (item 3).

[0073] Figure 2 shows the corresponding data flows in the system according to Figure 1. Ambient light data is generated by at least one ambient light sensor (item 2) depending on the detected ambient light and transmitted to the light control unit (item 1). In the light control unit (item 1), the ambient light data is calculated using one or more relative luminous threshold values ​​(item 33). Data for controlling the light emission of the display panel (item 4) is then transmitted from the light control unit (item 1) to the pixel controller (item 3), e.g., in the form of non-LTE brightness data (item 40). The brightness data (item 40) can be measured in units such as candelas (cd) or candelas per square meter (cd / m 2 ) or in digital RGB data, e.g. scaled as bit values.

[0074] From the previously mentioned motif player (item 5), data for the motif to be displayed is transmitted to the pixel controller (item 3), e.g. in the form of motif data (item 50). For example, the motif data (item 50) can contain corresponding brightness and color values, e.g. in the form of RGB values ​​for each display pixel of the display field (item 4). The pixel controller (item 3) then manages the display pixels of the display field (item 4) in accordance with the brightness data (item 40) and the motif data (item 50). For example, the motif display is managed and / or the brightness of the display pixels (item 55) is controlled. The pixel controller (item 3) then transmits data (item 60) for controlling the display pixels of the display field (item 4), e.g. brightness data and / or color data (RGB).

[0075] Figure 3 is used to explain traffic zones in which the system according to Figure 1 can be used advantageously. The system can be used particularly advantageously in the area of ​​carriageways or roads, which are referred to as Zone 1 (Item 91). The system can also be used advantageously in the area close to roads, which is referred to here as Zone 2 (Item 92). Zone 2 can, for example, begin at a distance of 0 to 5 m from the edge of the roadway, i.e. from the edge of Zone 1, and end at a distance of 5 to 20 m from the edge of the roadway. In addition, the system according to the invention can also be used advantageously in an area further away from the road, which is referred to here as Zone 3 (Item 93).

[0076] Zone 3 can, for example, extend over an area of ​​20 to 200 m from the edge of the road.

[0077] Figure 4 shows various possible uses of the system according to the invention, which are designated here with items 10 to 23, by way of example. The possible uses items 10, 11 and 12 are particularly suitable for zone 1 and zone 2. The possible uses items 10 and 12 are also suitable for zone 3. The possible uses items 13, 14 and 15 are suitable for zone 2 and zone 3. The possible uses items 16 and 17 are suitable, for example, for zone 1 and zone 2, although they can also be used in an overlapping manner in these zones. With the possible use item 16, use in all three zones 1 to 3 is also possible, even overlapping. The possible uses items 18 and 21 are suitable for zones 1 and 2, although they can also be used in an overlapping manner in these zones. The possible use of Pos.21 can be used in Zone 1 and Zone 2, even overlapping, or in Zone 3. The system shown in Figure 1 can be attached to one of the devices shown in items 10 to 23 or to a device installed there. List of reference symbols:

[0078] Pos. 1 Non-LTE - Light control unit (control unit);

[0079] Pos. 2 Ambient light sensor (sensor);

[0080] Pos. 3 pixel controller (controller);

[0081] Pos. 4 pixel technology display field (display);

[0082] Pos. 5 motif-technical playback device (player);

[0083] Item 8 Non-LTE - Display device / system / device (non-LTE);

[0084] Pos. 10 Vehicles of all types

[0085] (e.g. automobiles, mobile homes, trucks, buses, rickshaws; trailers; two-wheelers, three-wheelers, quads, caddies, funmobiles, excavators);

[0086] Pos. 11 E-mobiles of all kinds

[0087] (e.g. e-scooters, e-boards, e-bikes, e-bicycles, e-wheelchairs);

[0088] Pos. 12 Railways of all kinds (e.g. trams, subways, trams, tourist trains);

[0089] Item 13 Cranes of all kinds (e.g. construction cranes, harbour cranes, scraper cranes; boom cranes);

[0090] Item 14 Scaffolding structures of all kinds (e.g. scaffolding, platforms, lifts);

[0091] Pos. 15 Displays of all kinds (e.g. pylons, fences, lanterns, construction site displays, signage displays, event displays);

[0092] Pos. 16 Bridges of all types (e.g. traffic bridges, gangways, pedestrian bridges);

[0093] Pos. 17 Guying of all kinds (e.g. garlands, tensioned posters or banners);

[0094] Pos. 18 Fences of all kinds

[0095] (e.g. construction fences, event barriers, property fences, railings);

[0096] Pos. 21 Vehicle parking areas and parking spaces of all kinds (e.g. rest areas, petrol stations, hotels, events, companies, markets, multi-storey car parks, parking lots);

[0097] Pos. 22 Intersection areas with or without traffic lights;

[0098] Pos. 23 stops of all kinds

[0099] (e.g. bus, tram, streetcar, taxi, subway, train stops);

[0100] Pos. 30 Ambient light data;

[0101] Pos. 33 Calculation of the “ambient light data” with the “relative luminous limit values”;

[0102] Pos. 40 Non-LTE - Brightness data (cd; cd / m 2 );

[0103] Pos. 50 motif data (RGB; CMY; CMYK);

[0104] Pos. 55 Management of the “Display field pixels”:

[0105] - Management of motif display;

[0106] - Brightness control (non-LTE);

[0107] Pos. 60 Control of display field pixels:

[0108] - brightness data;

[0109] - Colour data; Item 91 Traffic zone 1 (roads, traffic routes, carriageways);

[0110] Item 92 Traffic zone 2 (stops; parking bays, parking strips and spaces; sidewalks);

[0111] Item 93 Traffic zone 3 (pedestrian zones; rest areas; areas relatively close to the road).

Claims

Patent claims 1. Light control unit (Pos. 1) for ambient light-dependent luminance adjustment for a display device (Pos. 20) which has at least one pixel-technological display field (Pos. 4) for displaying changing motifs, which has a plurality of separately controllable display pixels, characterized in that the light control unit (Pos. 1) is configured to evaluate at least one ambient light measurement value from at least one ambient light sensor (Pos. 2) and, depending on the at least one ambient light measurement value, to operate the display field (Pos. 4) at any time as a non-lighting device (non-LTE) in the sense of road traffic law by controlling the light emission of the display field (Pos. 4).

2. Light control device according to claim 1, characterized in that the light control device (Pos. 1) is configured to generate the control signals to be output for controlling the light emission of the display field (Pos. 4) by continuously calculating (Pos. 33) the ambient light measured values ​​from the at least one ambient light sensor (Pos. 2) with a relative luminous limit value and thereby to ensure that, depending on the ambient light, the entire display field (Pos. 4) or one or more parts thereof appear as non-luminous.

3. Light control unit according to one of the preceding claims, characterized in that the light control unit (Pos. 1) is configured to limit the light emission of the display field (Pos. 4) by means of the output control signals, so that the light emission of the display field (Pos. 4) is less than +0.5 cd / m² 2 compared to the average relative ambient light (Pos. 30).

4. Light control unit according to one of the preceding claims, characterized in that the light control unit (Pos. 1) is configured to perform the conversion of the ambient light measured values ​​from the at least one ambient light sensor (Pos. 2) into the control signals to be output by means of a degressive or hyperbolic characteristic curve, with which the ambient light measured values ​​can be converted degressively or hyperbolically into absolute light emission values ​​of the display field (Pos. 4) or into relative luminance values ​​of the display field (Pos. 4). Light control unit according to one of the preceding claims, characterized in that the light control unit (Pos. 1) is configured to perform the conversion of the ambient light measured values ​​from the at least one ambient light sensor (Pos. 2) into the control signals to be output by means of one, several or all of the following assignments: the luminous threshold is approximately 10.5 cd / m² at 100 lux ambient light. 2The luminous efficacy limit is approximately 14.2 cd / m² at 120 lux ambient light. 2 The luminous efficacy limit is approximately 45.9 cd / m² at 320 lux ambient light. 2 The luminous efficacy limit is approximately 169.6 cd / m² at 500 lux ambient light. 2 The luminous efficacy limit is approximately 175.2 cd / m² at 550 lux ambient light. 2 The luminous efficacy limit is approximately 238.0 cd / m² at 1000 lux ambient light. 2 The luminous efficacy limit is approximately 400.0 cd / m² at 2000 lux ambient light. 2 The luminous efficacy limit is approximately 1238.0 cd / m² at 3000 lux ambient light. 2 The luminous efficacy limit is approximately 1400.0 cd / m² at 5000 lux ambient light. 2 The luminous efficacy limit is approximately 2238.0 cd / m² at 10000 lux ambient light. 2 The luminous efficacy limit is approximately 2400.0 cd / m² at 20,000 lux ambient light. 2 The luminous efficacy limit is approximately 3238.0 cd / m² at 30,000 lux ambient light. 2The luminous efficacy limit is approximately 3900.0 cd / m² at an ambient light level of 38380 lux. 2 The luminous efficacy limit is approximately 4400.0 cd / m² at 41000 lux ambient light. 2 The luminous efficacy limit is approximately 5500.0 cd / m² at 50000 lux ambient light. 2 The luminous efficacy limit is approximately 8500.0 cd / m² at 75000 lux ambient light. 2 The luminous efficacy limit is approximately 10,500 cd / m² at 90,000 lux ambient light. 2 The luminous efficacy limit is approximately 11,500 cd / m² at 100,000 lux ambient light. 2 The luminous efficacy limit is approximately 12,500 cd / m² at an ambient light level of 110,000 lux. 2A light control device according to one of the preceding claims, characterized in that the light control device (Pos. 1) is configured to limit, during a transition of the ambient light (Pos. 30) from light to dark, the change in the control signals for controlling the light emission of the display field (Pos. 4) to a first transition gradient, by which the light emission of the display field (Pos. 4) is gradually reduced to a value corresponding to the darker ambient light (Pos. 30). A light control device according to one of the preceding claims, characterized in that the light control device (Pos. 1) is configured, during a transition of the ambient light (Pos. 30) from dark to light, to limit, by a second transition gradient, the change in the control signals for controlling the light emission of the display field (Pos. 4). the light emission of the display field (item 4) is gradually increased to a value corresponding to the brighter ambient light (item 30). Light control device according to claim 7, characterized in that the first transition gradient is greater than the second transition gradient. Light control device according to any of the preceding claims, characterized in that the light control device is configured to switch on the luminance adjustment, i.e., the ambient light-dependent control of the light emission of the display field, when a first daylight threshold is exceeded and to switch it off when a second daylight threshold is undershot. Light control device according to any of the preceding claims, characterized in that the light control device (item 1) has a computer, wherein the light control device (item 1) is configured to execute a computer program on the computer and thereby control the light emission of the display field (item 4).Light control device according to claim 10, characterized in that the computer program and / or the data used by the computer program can only be modified after authorization and / or not by remote access. Light control device according to any of the preceding claims, characterized in that the light control device (item 1) is protected against unauthorized access by at least one sealing element. System for ambient light-dependent luminance adjustment for a display device (item 20) comprising at least one pixel-based display field (item 4) for displaying changing motifs, which has a plurality of separately controllable display pixels, characterized in that the system comprises at least one light control device (item 1) according to any of the preceding claims, at least one ambient light sensor (item 2) connected to the light control device (item 1), and the at least one pixel-based display field (item 4).System according to claim 13, characterized in that the display technology of the display field (Pos. 4) is light-emitting or non-light-emitting or backlit or illuminated. System according to one of claims 13 or 14, characterized in that the ambient light sensor (Pos. 2) and the light control unit (Pos. 1) are a single unit from an information technology perspective and / or are designed as a single assembly from a device technology perspective. System according to one of claims 13 to 15, characterized in that the ambient light sensor (Pos. 2) and / or the light control unit (Pos. 1) form a structural unit with the at least one pixel-based display field (Pos. 4), wherein the pixel-based display field is controlled by the light control unit directly or indirectly via a pixel controller (Pos. 3). System according to one of claims 13 to 16, characterized in that an optimal luminance of the display field (Pos.4) is generated by calculating the ambient light values ​​of at least one ambient light sensor with a diffusing lens and the ambient light values ​​of at least one ambient light sensor with a clear lens and a light sensor surface positioned parallel to the display area of ​​the display field or otherwise. Use of a system according to one of claims 13 to 17 for displaying advertising information and / or other information in public areas, in particular on vehicles on generally accessible roads, parking lots and / or in the roadside area, and / or on stationary devices. Computer program for a light control device according to one of claims 1 to 12, characterized in that the computer program is configured to perform at least the control of the brightness of the light emission of the display field (item 4) when the computer program is executed on a computer of the light control device (item 1).Computer program according to claims 3 and 5, characterized in that it allows a maximum directional reflectance of +25% relative to the ambient light and controls the display field (pos. 4) accordingly. Ambient light sensor for a light control unit according to any one of claims 1 to 11, characterized in that the ambient light sensor has a diffusing lens or a clear lens.

Images