Display device having a flexible display film, use and method employing such a display device

Abstract

The invention relates to a display device (10) having a display film (14) which has a size of more than 5 m2 and a thickness of preferably less than 5 mm. The display film (14) can comprise a plurality of LED modules (22) each having at least one LED (24a-c). The display device (10) comprises, in particular, a holder (12) for holding a placard of the same size, said holder now holding the display film (14).

Description

[0001] Applicant:

[0002] LightnTec GmbH Windeckstrasse 15 76135 Karlsruhe Germany

[0003] Display device with a flexible display film, use and

[0004] Method with such a display device

[0005] Background of the invention

[0006] It is known to use display devices for placards and / or posters.

[0007] A disadvantage of the known display devices is that replacing the posters or placards must be done manually by replacing the printed ones. Replacing the known display devices with displays generally requires the time-consuming process of obtaining a building and / or modification permit. The object of the invention

[0008] It is therefore an object of the invention to provide a display device which can be flexibly controlled in a simpler manner.

[0009] This object is achieved by a display device according to claim 1, the use of a display device according to claim 20 and a method according to claim 21. The dependent claims represent preferred developments.

[0010] The object of the invention is thus achieved by a display device with a flexible display film and a holder for the display film, wherein the display film has a plurality of individually controllable pixels for the flexible display of different images and an area of ​​more than 5 m 2 has.

[0011] The display device according to the invention enables "retrofitting" or digitization of existing poster displays by simply replacing a poster of such an already installed poster display with an electronic digital display foil. Typically, no building and / or modification permit is required for such a "retrofitting." By using a wafer-thin foil, the display device according to the invention avoids the need to replace the existing, building-approved supporting structure. By digitizing it using a "foil display," the display device according to the invention avoids the manual replacement of posters. Rather, the content displayed by the display foil can be changed at the touch of a button.

[0012] The pixels of the display film can be reflective, meaning they do not emit light themselves. The display film can be based on e-wetting technology; for example, the display film can be designed in the form of an e-paper.

[0013] The display device preferably has an area of ​​more than 7 m 2 , particularly preferably more than 8 m 2 , on.

[0014] In a particularly preferred embodiment of the invention, the display film has a size of 356 cm x 252 cm. The maximum thickness, in particular the thickness of the predominant surface area, of the display film is preferably less than 7 mm, in particular less than 5 mm, more preferably less than 3 mm, and particularly preferably less than 1 mm.

[0015] The display foil can have multiple foil segments. The foil segments can have the same or different surfaces.

[0016] The pixels of the display film can be designed in the form of LED (light-emitting diode) modules, each with at least one LED.

[0017] The LED modules can be arranged in a matrix. In the simplest case, each LED module consists of a single LED. The LED modules can also include control electronics. The LED modules can include multiple LEDs, particularly LEDs of different colors. Preferably, the LED modules each include at least one red, one green, and one blue LED.

[0018] The LEDs can be in the form of OLEDs (organic LEDs).

[0019] In order to achieve sufficient resolution with the simplest possible design of the display film, the pixels can have a distance of between 0.3 mm and 16 mm to the next neighboring pixel.

[0020] In order to enable particularly energy-efficient operation of the pixels, the display film can have a micro-optic display film on several pixels.

[0021] The micro-optics can be designed to reduce the beam angles of the LED modules to typical sight and viewing axes.

[0022] In a further embodiment of the invention, different pixels can be configured for operation with different supply voltages. The power supply unit for providing the supply voltage can be spaced from the display foil by at least 50 cm, in particular at least 1 m, and particularly preferably more than 1.5 m. The spatial distance between the power supply unit and the display foil enables a particularly lightweight and space-saving design of the display foil, thus facilitating particularly easy retrofitting.

[0023] The power supply can be mounted on the floor or on a stand. The display device can have a fuse box with the power supply.

[0024] One part of the display device can be designed to operate with a supply voltage of 3 volts to 6 volts, while another part of the display device can be designed to operate with a supply voltage of 7 volts to 48 volts. This allows for further optimization of energy efficiency.

[0025] The display foil can be designed to be particularly compact if it has driver electronics integrated into the display foil.

[0026] The display device may have a data cable and / or an antenna for receiving the images to be displayed. Alternatively or additionally, the display device may have an interface for connecting to a content management system (CMS).

[0027] The thickness of a driver electronics of the display device on or in the display film is preferably less than 6 mm, in particular 4 mm, preferably 2 mm perpendicular to the plane of extension of the display film.

[0028] The display film preferably has driver electronics that do not have a test image generator and / or image content data memory. As a result, image generation and image processing (where is the pixel? Does it need to be corrected?) are shifted away from the display film. The display film cannot therefore generate images independently. Particularly preferably, the driver electronics can only perform digital-to-analog conversion. In contrast to the driver electronics, control electronics of the display device are preferably not arranged on the display film or integrated into the display film, but rather arranged at a distance from the display film. The control electronics are preferably more than 50 cm, in particular more than 1 m, particularly preferably more than 1.5 m, from the display film.

[0029] The spatial distance between the control electronics and the display foil enables the display foil to be designed particularly light and space-saving, thus making retrofitting particularly easy.

[0030] The display device may comprise a carrier sheet stretched over the display film.

[0031] Alternatively or additionally, the display device may have a self-tensioning mounting frame to stabilize the display film.

[0032] The display film may have a puzzle structure for arranging film segments.

[0033] The display foil can be fixed in the display device by a Velcro strip and / or a spring.

[0034] For permanent outdoor installation of the display device, the display device can be protected against the ingress of splash water from all sides and against the ingress of solid foreign bodies with a diameter of more than 1 mm.

[0035] Alternatively or additionally, the display device can be protected against vandalism and theft.

[0036] In a further preferred embodiment of the display device, it can have a closable opening designed for exchanging posters and / or placards, wherein the display film can be exchanged via the closable opening. The display device can be designed to display videos whose individual images cannot be distinguished by the human eye. Alternatively, the display film can be designed only to display image changes at intervals of more than 1 second.

[0037] The display foil can only be designed to display image changes at intervals of more than 2 seconds, preferably more than 10 seconds. This can prevent distraction for road users.

[0038] Alternatively or additionally, the display device can have a sensor configured to detect stationary traffic, with control electronics of the display device configured to initiate an image change only when stationary traffic is detected. This can reliably prevent distractions for road users. For example, an image change can only be initiated when all road users are waiting at a red light. The control electronics can be AI-based.

[0039] The display film can comprise a light-absorbing base film. The base film can comprise an extremely matte black, light-absorbing and contrast-enhancing overcoat layer, particularly in the form of a deep black flock, and / or a light-absorbing micro-optic layer to increase the contrast and energy efficiency of the display film.

[0040] The display device can be designed for wall mounting. Alternatively or additionally, the display device can have a first base for freestanding installation of the display device. The display device can have a second base.

[0041] The display film preferably has a total weight of less than 100 kg and can therefore be installed without a crane. It is particularly preferred that the display film has a maximum weight of less than 7 kg / m 2 , especially 5 kg / m 2 , more preferably 3 kg / m 2 .

[0042] The display device preferably has only one driver electronics, one control electronics and / or one power supply.

[0043] The object of the invention is further achieved by the use of a display device for presenting a paper poster and / or a paper poster for presenting a flexible display film, wherein the display film has a plurality of individually controllable pixels for displaying different images and has an area of ​​more than 5 m 2 has.

[0044] The display device and the display film can be designed as described above and below.

[0045] The object of the invention is further achieved by a method for operating a display device described here with the method steps:

[0046] A) image generation and / or image processing in a control electronics arranged at a distance from the display foil;

[0047] B) Transmission of the image information from the control electronics to a driver electronics arranged on or in the display film;

[0048] C) Digital-to-analog conversion of the image information in the driver electronics;

[0049] D) Control of the pixels by the driver electronics.

[0050] In the method according to the invention, the image generation and essential image processing are shifted away from the display film, so that the display film can be designed to be particularly space- and weight-saving, which significantly facilitates retrofitting.

[0051] Further advantages of the invention will become apparent from the description and the drawings. Likewise, the above-mentioned and further-described features can be used individually or in combination in any desired manner. The embodiments shown and described are not intended to be exhaustive, but rather are exemplary in nature for describing the invention.

[0052] Detailed description of the invention and drawing

[0053] Figure 1 shows a side view of a display device according to the invention.

[0054] Figure 1 shows a display device 10 with a holder 12 in which a display film 14 is arranged. In this case, the holder 12 is designed in the form of a housing, particularly a weatherproof one. The holder 12 stands on a base 16.

[0055] The display film 14 has several film segments 18a, b, c. The display film 14 has driver electronics 20 integrated into the display film 14.

[0056] The display film 14 has several LED modules, of which only one LED module 22 is provided with a reference symbol in Figure 1 for reasons of clarity. The LED modules 22 represent pixels of the display film 14.

[0057] From the enlarged view in Figure 1 it can be seen that the LED modules 22 each have several LEDs 24a, b, c and a control electronics 26.

[0058] The display foil 14 shown in Figure 1 was previously replaced with a conventional poster. This made it possible to easily digitize or retrofit the display device 10.

[0059] Taking a summary of the drawing, the invention relates to a display device 10 with a more than 5 m 2 large and preferably less than 5 mm thick display film 14. The display film 14 can have several LED modules 22, each with at least one LED 24a-c. The display device 10 has, in particular, a holder 12 for holding a poster of the same size, which now holds the display film 14.

[0060] List of reference symbols

[0061] 10 Display device

[0062] 12 Bracket

[0063] 14 Display foil 16 Stand

[0064] 18a-c film segments

[0065] 20 Driver electronics

[0066] 22 LED modules

[0067] 24a-c LEDs 26 Control electronics

Claims

Patent claims 1. Display device (10) with a flexible display film (14), wherein the display film (14) has a plurality of individually controllable pixels for displaying different images and wherein the display film (14) has an area of ​​more than 5m 2 wherein the display device (10) has a holder (12) for the display film (14).

2. Display device according to claim 1, wherein pixels are designed in the form of LED modules (22) each having at least one LED (24a-c).

3. Display device according to claim 1 or 2, wherein the pixels have a distance of between 0.3 mm and 16 mm to the next adjacent pixel.

4. Display device according to one of the preceding claims, wherein the display film (14) has a micro-optics of the display film (14) on a plurality of pixels in order to enable energy-efficient operation of the pixels.

5. Display device according to one of the preceding claims, in which different pixels are designed to operate with different supply voltages.

6. Display device according to one of the preceding claims, in which a power supply of the display device (10) for providing the supply voltage is spaced at least 50 cm, in particular at least 1 m, particularly preferably more than 1.5 m.

7. Display device according to one of the preceding claims, wherein the display film (14) has driver electronics (20) integrated into the display film (14).

8. Display device according to one of the preceding claims, in which the display device (10) has a driver electronics (20) whose thickness perpendicular to the extension of the display film (14) does not exceed 6 mm.

9. Display device according to one of the preceding claims, wherein the display device (10) has a driver electronics (20) which does not have a test image generator and / or an image content data memory.

10. Display device according to one of the preceding claims, in which a control electronics (26) of the display device (10) is arranged at a distance from the display film (14).

11. Display device according to one of the preceding claims, wherein the display device (10) has a carrier sheet which is stretched over the display film (14).

12. Display device according to one of the preceding claims, wherein the display device (10) has a self-tensioning mounting frame for stabilizing the display film (14).

13. Display device according to one of the preceding claims, wherein the display device (10) has a Velcro strip and / or a spring for fixing the display film (14).

14. Display device according to one of the preceding claims, in which the display device (10) is protected against the penetration of splash water from all sides and against the penetration of solid foreign bodies with a diameter of more than 1 mm.

15. Display device according to one of the preceding claims, wherein the display device (10) has a closable opening which is designed for the exchange of posters and / or placards, wherein the display film (14) is exchangeable via the closable opening.

16. Display device according to one of the preceding claims, in which the display film (14) is designed exclusively for displaying image changes at a time interval of more than 1 second.

17. Display device according to one of the preceding claims, in which the display device (10) has a sensor which is designed to determine stationary road traffic, wherein control electronics (26) of the display device (10) are designed to initiate an image change only when stationary road traffic is detected.

18. Display device according to one of the preceding claims, wherein the display film (14) has a light-absorbing base film.

19. Display device according to one of the preceding claims, in which the display film (14) has a total weight of 100 kg and / or a maximum weight of 7 kg / m 2 falls below.

20. Use of a display device (10) for presenting a paper poster and / or a paper poster for presenting a flexible display film (14), wherein the display film (14) has a plurality of individually controllable pixels for displaying different images and has an area of ​​more than 5m 2 has.

21. A method for displaying an image on a display device (10) according to one of claims 1 to 19, wherein the display device (10) has control electronics (26) and driver electronics (20), with the method steps: A) image generation and / or image processing in control electronics (26) which is arranged at a distance from the display film (14); B) Transmission of the image information from the control electronics (26) to a driver electronics (20) arranged on or in the display film (14); C) Digital-to-analog conversion of the image information in the driver electronics (20); D) Control of the pixels by the driver electronics (20).

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