Display change in an electronic paper display without a recovery process

Abstract

The invention relates to an apparatus (14) for displaying variable information (I1, I2) on an electronic paper display (6) in a passenger cabin (2) of a vehicle (4) comprising the electronic paper display (6), the apparatus containing a control unit (16) that controls the paper display (6) during operation (B) and has a usage variable (V), wherein the usage variable (V) has at least one first usage value (N1) if the paper display (6) is potentially visible to passengers (12) in the passenger cabin (2), and has at least one second usage value (N2) if the paper display (6) is not visible to passengers (12) in the passenger cabin (2) and / or if it can be assumed that passengers (12) will not be disturbed by the performance of a recovery process (E) on the paper display (6), wherein the control unit (16) is designed, upon receiving a request (A) to change the information (I1, I2) displayed on the paper display (6) from a first information item (I1) to a second information item (I2), to determine which of the usage values (N1, N2) is currently present, and, if the first usage value (N1) is currently present, to control the paper display (6) to display the second information item (I2) immediately after the first information item (I1) without an intervening recovery process (E). In a method for operating the apparatus (14), upon receiving the request (A) to change the information (I1, I2) displayed on the paper display (6) from a first information item (I1) to a second information (I2), the control unit (16) checks which of the usage values (N1, N2) is currently present, and, if the first usage value (N1) is currently present, the control unit controls the paper display (6) to display the second information item (I2) immediately after the first information item (I1) without an intervening recovery process (E).

Description

[0001] RT / ND / dk

[0002] Display change on electronic paper without recovery process

[0003] The invention relates to changing the display of information on an electronic paper.

[0004] From US patent 11,620,959 B2, improved push-pull driver waveforms are known for driving an electrophoretic medium with four particles, including four different types of particles, for example, one set of scattering particles and three sets of subtractive particles. Methods for identifying a preferred waveform for a target color state when using a voltage driver with at least five different voltage levels are also known.

[0005] The object of the present invention is to propose improvements with regard to changing the display of an electronic paper.

[0006] The problem is solved by a device according to claim 1. Preferred or advantageous embodiments of the invention and of other invention categories will become apparent from the further claims, the following description and the accompanying figures.

[0007] The device is designed to display changeable information. The information is displayed on or reproduced by an electronic paper. This electronic paper is located in the passenger cabin of a vehicle. The vehicle is typically an aircraft, but could also be a bus, train, etc.

[0008] "Changeable" is to be understood as follows: At successive time intervals (lasting at least a few minutes or at least one hour), two different pieces of information are to be displayed on or reproduced from the paper. The information to be displayed in each time interval is, in particular, static image information, i.e., a still image, and therefore contains no image content that changes (during the time interval). Specifically, the information does not contain or is not moving images / animations / films / videos, etc.

[0009] The information is any image content or display content that can be represented on paper, and can include, for example, text and / or images and / or graphics, etc.

[0010] In other words, the electronic paper should display a constant sequence of information / image content / images / etc. Put another way, the displayed still image should change to a different, modified still image from time to time.

[0011] The facility includes electronic paper.

[0012] The device also includes a control unit. This unit is communicatively and control-technically connected to the paper in such a way that, during operation of the device, it controls the paper so that it displays the respective information.

[0013] The control unit has a usage variable; that is, such a variable exists within the control unit, or at least the control unit can access such an (external) variable or its values, for example via a suitable interface. In other words, the usage variable is available to the control unit.

[0014] In particular, the usage variable is determined within the control unit.

[0015] The usage variable has at least one initial use value. It currently has this value whenever the document is potentially visible to passengers in the passenger cabin.

[0016] The usage variable has at least one second use value if the paper is not potentially visible to passengers in the passenger cabin and / or if it can be assumed that passengers are not potentially bothered by the performance of a recreation process (see below) on the paper.

[0017] In particular, the usage variable has its second value when there are no passengers in the passenger cabin. "Potential" means that there is at least a possibility that passengers could view the electronic document or be disturbed by the recovery process.

[0018] The control unit is configured to respond to a request to change the information displayed on the paper from a first to a second piece of information as follows. The request means that the second piece of information should now be displayed instead of the first. It is therefore assumed that when the request arrives, the first piece of information is currently displayed on the paper, and a changed second piece of information should now be displayed. The second piece of information differs from the first, meaning it represents a different image to be displayed. In other words, the paper needs to be "reprogrammed" with regard to its otherwise static display.

[0019] The control unit is configured to react as follows: It is configured to check which of the usage values ​​is currently present. If the current check shows that the first usage value is currently present, the control unit is configured to immediately move the paper to display the second piece of information after the first piece of information has been displayed, without moving the paper to a recovery position between the two displays of the two pieces of information.

[0020] The recovery process is one that brings the paper into a defined state, namely to completely remove / delete / neutralize the previously displayed first image content / information, at least to the extent that the same image content is not needed for the second image content / information.

[0021] Such a recovery process is also called a "recovery process" and consists in particular of the arrangement of indicator particles in the paper in a predetermined / specific way.

[0022] In other words, the recovery process removes so-called burn-in effects / afterglow effects (e.g., the unwanted persistence of image information) and / or restores the paper's color representation to a specific target state. However, such a recovery process is often accompanied by the display of information that is undesirable for passengers (image changes / flickering / glow / patterns that are potentially perceived as visually unappealing / unsightly / disturbing) and / or lasts an undesirably long time (e.g., at least 5, 10, 20, or 30 seconds).

[0023] In other words, according to the invention, if passengers might potentially feel disturbed, a recovery process that could potentially cause such disturbance is omitted. A possible reduction in image quality when displaying the second piece of information immediately after the first (compared to the display after a recovery process) is accepted. This is because it is assumed that the reduced image quality might be perceived by passengers as potentially less disturbing than the recovery process itself.

[0024] The invention is transferable from vehicles, in particular, to electronic documents in other applications / locations, such as documents found in public, like electronic documents in interiors / shop windows / in public spaces (advertising boards, signs), etc. Passengers are then to be understood as passers-by / users / other persons.

[0025] The invention achieves the display of various pieces of information on the paper without exposing passengers to potentially disturbing appearances of the paper, either completely or only for a shorter period (compared to the recovery process).

[0026] In a preferred embodiment, the paper is capable of displaying at least three colors. This means the paper can display at least three different colors, and not just black and white. With such (color) papers, recovery processes are particularly visually unappealing / disturbing for viewers and / or take an uncomfortably long time.

[0027] In a preferred embodiment of this design, the paper contains a plurality of display elements. Each display element contains differently colored particles to represent the at least three colors mentioned. The (reproduced) color of the display element depends on the layering of the particles within the display element. In other words, the color appearance is changed by rearranging the particles, i.e., by changing their distance from the visible surface of the paper.

[0028] The recovery process involves multiple successive re-shifts, resulting in alternating displays of different colors and / or brightness levels, to arrange the particles into a predetermined layer within the display element. In other words, this involves multiple successive flickering / glows / pattern displays, which passengers might find unsightly or even disturbing.

[0029] Such recovery processes, in particular, should be avoided with regard to increasing the visual comfort of passengers in relation to the paper.

[0030] Such display elements are, in particular, the paper's display pixels. The paper is then designed in the form of a pixel or matrix display.

[0031] Different colored particles are, for example, four different types of particles in the colors "reflective white," "cyan," "magenta," and "yellow." With such a display element, the change in the displayed information takes a particularly long time, approximately 30 seconds. One such paper is the so-called "ACeP" (Advanced Color electronic Paper), see, for example, https: / / de.wikipedia.org / wiki / Elektronisches_Papier or the citation "14" there: "E INK ANNOUNCES ADVANCED COLOR EPAPER, A BREAKTHROUGH TECHNOLOGY FOR COLOR EPD APPLICATIONS", https: / / web.archive.org / web / 20160924134807 / http: / / www.einkgroup.com / news.php?recordld=595, accessed on September 17, 2024.

[0032] The invention is particularly effective with such paper because it significantly reduces the undesirably long switching times between the display of different information and avoids the recovery processes that are perceived as potentially unappealing from an optical perspective.

[0033] In a preferred embodiment, the control unit is also configured to respond to the request as follows:

[0034] If the current check (see above) shows that the second use value is currently present, the control unit is configured to first direct the paper to the recovery process after displaying the first information, and only then direct the paper to display the second information. In other words: If the second use value currently ensures that

[0035] - the document is not visible to passengers in the passenger cabin and / or

[0036] - It can be assumed that passengers will not be bothered by the carrying out of a recovery process on the paper.

[0037] The display change is then carried out in such a way that, after the first piece of information is displayed, a recovery process is performed to remove any burn-in effects, color defects, etc. from the paper. Only then is the second piece of information displayed again in full quality.

[0038] Thus, if passengers are not disturbed, a high-quality display change from the first to the second piece of information can take place.

[0039] In a preferred embodiment, the control unit is further configured to proceed as follows:

[0040] The control unit checks whether at least two different pieces of information have been displayed without an intervening recovery process. If so, the control unit is configured to initiate a recovery process for the paper at a later time.

[0041] In other words, the control unit "remembers" that at least two different pieces of information were displayed without an intervening recovery process, which could mean that burn-in effects, unwanted residual representations of previous image content, color deviations, etc., have since appeared on the paper. In this case, the control unit registers a "pre-booking" for a later recovery process in order to return the paper to its neutral initial state / display state.

[0042] In particular, the later timing can be chosen so that passengers are disturbed as little as possible – depending, for example, on the probability / potential degree of display errors. In other words, the criterion for the later timing can be, for example, a trade-off between potential display errors and the passengers' tolerance of the recovery process. The later timing can also be chosen based on a specific number of screen refreshes, for example, by ensuring that the recovery process takes place no later than the third, fifth, or tenth screen refresh.

[0043] In other words, a criterion is chosen where the interest

[0044] - to subject the paper to a recovery process,

[0045] - the interest in exposing passengers to the potentially unsightly and / or lengthy recovery process outweighs the other considerations.

[0046] In a preferred embodiment, the later point in time is one at which the second use value is present. In other words, the control unit waits until no passengers can view the paper and only then performs the recovery process. This ensures that if, later still—after the recovery process—passengers who could potentially view the paper re-enter the passenger cabin, it has already undergone a recovery process and been reset to its initial state, thus enabling a high-quality display of information.

[0047] In a preferred embodiment, the utility value is determined based on the vehicle's current operating phase. Such an operating phase includes, for example, the "vehicle empty" phase (no passengers), "vehicle idle / maintenance work (e.g., cleaning the passenger cabin)," or "vehicle in regular operation" (passengers in the passenger cabin). From such operating phases, it can be inferred whether passengers might potentially view the paper and be disturbed by a recreational activity (then the first utility value applies) or not (then the second utility value applies). Thus, the utility value can be determined particularly easily.

[0048] If the invention were transferred away from vehicles, a first use value would be present, for example, during the opening hours of a shop, such as during the day, or when a comparatively large number of pedestrians are potentially present in a pedestrian zone or road users on a street and could potentially view the advertisements in the shops, shop windows, pedestrian zones, or billboards / traffic signs. In a preferred embodiment, the vehicle is an aircraft. Especially in aircraft, passengers should ideally not be exposed to the effects of the invention due to the expected comfort, so the invention can be used particularly effectively here.

[0049] In conjunction with determining the usage value based on the current operating phase, these operating phases are referred to as flight phases. For example, the first usage state is selected during the flight phases "flight phase," possibly also "take-off / landing." The second usage state is selected, for example, during the flight phases "boarding / deboarding," or alternatively, "take-off / landing," and "downtime." During "downtime," for instance, cleaning of the passenger cabin is carried out by cleaning staff without passengers present. This is a particularly advantageous time for relaxation. During boarding / deboarding, passengers are generally not paying attention to displays on certain documents / indicators, so relaxation is also possible during this time.

[0050] In a preferred embodiment, the control unit is at least part of a cabin management system or is the cabin management system for the passenger cabin. In an aircraft, such a cabin management system is also called a "CMS" (cabin management system) and is responsible, for example, for controlling climate, lighting, displays (signs), etc. Such a cabin management system can be particularly easily adapted to take over the functionality of the control unit in order to implement the invention.

[0051] The problem of the invention is also solved by a method according to claim 10.

[0052] This serves to operate the device according to the invention. In the method, the control unit, upon request to change the information displayed on the paper from a first to a second piece of information, performs the following:

[0053] The control unit checks which of the usage values ​​is currently present. If the first usage value is currently present, the control unit immediately moves the paper to display the second piece of information after the first, without moving the paper for an intermediate recovery process between the display of the two pieces of information. The method and at least some of its possible embodiments, as well as their respective advantages, have already been explained in substance in connection with the device according to the invention. In particular, the preferred embodiments mentioned above in connection with the device also constitute preferred embodiments of the method.

[0054] The invention is based on the following findings, observations, and considerations and further comprises the following preferred embodiments. These embodiments are sometimes referred to simply as "the invention." The embodiments may also include parts or combinations of the embodiments mentioned above, correspond to them, and / or may include previously unmentioned embodiments.

[0055] According to the invention, a subsequent recovery process for EPD displays (electronic paper displays) is particularly effective. Specifically, to shorten the switching time between two images (display of two pieces of information) shown on an EPD display, the recovery process is performed at a later time.

[0056] The invention is based on the practical observation that an image change on an EPD (electronic paper display) takes approximately 30 seconds in full color, during which the respective primary colors are displayed sequentially. This switching process is perceived as a colorful flicker and is neither pleasant nor aesthetically pleasing. The idea of ​​the invention is therefore to make this image change faster and more visually appealing, without causing image burn-in.

[0057] It is also known from practical experience that, to prevent burn-in on an EPD display, all pigments (particles in the display elements) are individually moved to a "neutral layer" during an image change (switching from one piece of information to another, i.e., after the first piece of information has been displayed) in order to then build up a new image (second piece of information) from this position. This switching process takes approximately 30 seconds for a full-color display and changes color several times to reach the new state. The invention is based on the following consideration: When passengers are exposed to the EPD display (potentially viewing it), for example, during boarding, takeoff / landing, or the flight phase, the next image is built up as directly as possible during the image change (without an intermediate recovery process).The pigments are no longer placed in the neutral layer as before, but are directly lifted to their new position for each individual pixel. This process disregards burn-in effects in order to improve visual appeal, speed up image transitions, and allow for the display of more images (in the same amount of time).

[0058] If the aircraft is on the ground (downtime) and being cleaned, a recovery process is run to reduce or prevent burn-in effects. During this process, all pigments in the respective pixels are simultaneously moved to the neutral layer. This process is carried out when there are no passengers on board.

[0059] This results in a smoother, more pleasing image transition, a more pleasant viewing experience. Passengers can remain facing the display even during the image change. More images can be shown. Recovery still occurs (albeit later).

[0060] According to the invention, the recovery process does not occur after every image change (between the display of two different pieces of information), but only during a specific phase of the overall operation of the display. This rescheduling of the process enables faster and smoother switching times.

[0061] According to the invention, the following procedure is particularly advantageous: The cabin management system (CMS) controls various systems in the cabin. In an aircraft, this CMS also controls an EPD display or similar indicators. This control system "knows" which phase the aircraft is currently in, i.e., whether it is being boarded or cleaned. This information forms the basis for the subsequent recovery process. The downstream recovery application described here takes this information, for example, that boarding / deboarding is currently taking place, and offloads the recovery process. The downstream recovery process can be executed when the aircraft is being cleaned or is in the takeoff and landing phase. The invention is particularly useful for cabin design in aircraft cabins. It can also be used for displays in trains, buses, or public spaces.

[0062] Further features, effects, and advantages of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. These figures are shown in a schematic diagram:

[0063] Figure 1 shows a section of a passenger cabin of an aircraft with a fitting,

[0064] Figure 2 shows a temporal sequence of advertisements on the paper from Figure 1.

[0065] Figure 3 shows an alternative temporal sequence of the displays corresponding to Figure 2.

[0066] Figure 4 shows another alternative temporal sequence of such advertisements.

[0067] Figure 1 shows a highly symbolic section of a passenger cabin 2 of a vehicle 4, here a passenger aircraft. Inside the passenger cabin 2 is an electronic paper 6, here in the form of a pixel-based screen or matrix display, which is mounted on a partition 8 in the passenger cabin 2.

[0068] The paper is pixel-oriented and therefore contains a large number of display elements 24, which are only symbolically indicated here. These represent cells of the paper 6 or the display based on it.

[0069] Paper 6 is a so-called "four-color" paper, which contains "white reflective" as well as "cyan", "magenta" and "yellow" colored particles as four basic colors and can therefore represent the corresponding basic colors as well as mixed colors.

[0070] Each of the display elements 24 is filled, in a manner not shown, with a multitude of particles of the four types / colors described above. The color of the respective display element, as perceived visually by a viewer, e.g., passenger 12, is the display element 24, depends on the layering of the particles within the display element 24. A recovery process E can be performed on the paper 6. The recovery process E is one in which the particles are arranged in a predefined layering within the display element 24 by repeatedly and successively activating the paper 6 or the display elements 24, thereby displaying different information.

[0071] Facing the partition 8 is a large number of passenger seats 10 (only three shown), on which passengers 12 can sit (and are currently seated).

[0072] Passenger cabin 2, or vehicle 4, contains a device 14 (indicated by a dashed outline). The paper 6 is part of the device 14. The device 14 also contains a control unit 16, here in the form of a cabin management system (CMS). The control unit 16 contains a usage variable V. The usage variable V can have a first usage value N1. This applies whenever there is a potential possibility that passengers 12 could view the paper 6. The usage variable V can also assume a second usage value N2. This occurs whenever the paper 6 is not visible to passengers in passenger cabin 2, or when it can be assumed that the passengers will not be disturbed by the recovery process E on the paper 6 and will tolerate it.

[0073] In the example, the control unit 16 is designed as cabin management system CMS 26 of passenger cabin 2 or vehicle 4.

[0074] The use value N1,2 is determined here based on a current operating phase B of vehicle 4. In the example in Figure 1, operating phase B is the flight phase, i.e., the aircraft is in regular flight, transporting passengers 12 in passenger cabin 2. In the example below, operating state B is "downtime," i.e., the passengers 12 have left the aircraft, and only cleaning personnel (not shown) are present. These personnel are not disturbed by either the duration of the recovery process E or by the changing display (see Figure 3) that occurs during this process.

[0075] Initially, a first piece of information 11 is displayed on paper 6. The control unit 16 is configured for the following procedure: The device 14 now contains (shown here only symbolically) a request A to change the information 11 displayed on paper 6: Instead of this, the information I2 should henceforth be displayed on paper 6.

[0076] Figure 2 shows the change from the display of information 11 to information I2 on paper 6 as a temporal progression from top to bottom.

[0077] Upon receiving request A, control unit 16 checks which of the usage values ​​N1,2 is currently available. Currently, the first usage value, N1, is available. Control unit 16 therefore controls paper 6 such that it switches directly from displaying information 11 to displaying information I2, without the paper being used to execute the recovery process E between the display of these two pieces of information 11,2.

[0078] This results in a rapid switch from the display of information 11 to the display of information I2. Information 11 displays symbol 18, here an airplane, in black on an orange background 20 in the lower left corner of the image. Only a single intermediate image 22 is required to switch the electronic paper 6 between information 11 and 2: Symbol 18 is briefly displayed twice in white on the orange background 20 for a duration of less than 5 seconds.

[0079] In information I2, the symbol 18 is displayed further to the right in the image, now again black on an orange background 20.

[0080] For the passengers 12, who are looking at the paper 6 during the switchover, it is evident that only the intermediate image 22 is briefly visible between the display of the two pieces of information 11,2, which is generally not perceived as disturbing by them.

[0081] The control unit 16 is also configured to perform the following procedure. If it receives a request A as described above and – in deviation from the above – the second usage value N2 is currently present: Then the control unit 16 first directs the paper 6 to the recovery process E after the display of information 11. Only then does it direct the paper 6 to display information I2. Figure 2 thus shows a procedure for operating the device 14. In this procedure, the request A to change the display from the first information 11 to the second information I2 on the paper 6 is initially received. The control unit 16 then checks which of the usage values ​​N1, N2 is currently present. If the first usage value N1 is currently present, which is the case here, the control unit 16 directs the paper 6 to display the second information I2 immediately after the first information 11, without an intermediate recovery process E, i.e.,without in the meantime switching to paper 6 to execute recovery process E.

[0082] Figure 3 again shows the temporal progression of the display on paper 6 from top to bottom. First, information 11 is displayed. Then the recovery process E begins. This proceeds as follows:

[0083] In a first step E1, the symbol 18 is displayed in white on the still orange background 20. In a step E2, the background 20 is switched to cyan, in a step E3 to yellow, and in a step E4 to white. Now a neutral plane is reached in the paper 6, meaning that all the differently colored particles in the display elements 24 are arranged in a predefined layering within the display element 24, and each of the display elements 24 now appears reflective white.

[0084] Only now does the control unit 16 control the paper 6 to display the information I2, which is why in an intermediate step 22 the symbol 18 is first displayed in black on a white background and only then is the background 20 colored orange.

[0085] Figure 2 shows an alternative embodiment (dashed lines). Here, after the display of information I2, further information 13, 4, 5, ... is displayed immediately without any intermediate recovery processes E. The device 14 is then configured to access the paper 6 for recovery process E at a later time ts, here when the aircraft has landed and all passengers 12 have left the passenger cabin 2. The now alternating display of the recovery steps E1 to E4 and their total duration of 30 seconds from Fig.

[0086] 3 can no longer disturb passengers 12. The later time ts is therefore chosen as the one at which the utility value N2 exists. Figure 4 shows a recovery process E starting from the display of information 12 on paper 6, after the two different pieces of information 11, 2 were displayed on paper 6 immediately one after the other (without recovery process E). Steps E1 to E4 correspond analogously to those in Figure 3, except that finally, in step E5, a completely black image is displayed, and in step E6, another completely white image is displayed, after step E4 has also reached the neutral plane.

[0087] Reference symbol list

[0088] 2 passenger cabins

[0089] 4 vehicles

[0090] 6 sheets of paper

[0091] 8 Partition wall

[0092] 10 passenger seats

[0093] 12 passengers

[0094] 14. Establishment

[0095] 16 Control unit

[0096] 18 Symbol

[0097] 20 Background

[0098] 22 Intermediate image

[0099] 24 Display element

[0100] 26 CMS usage variables

[0101] N1 ,2 Use value

[0102] 11.2 Information

[0103] A requirement

[0104] E Recovery process ts Time (later)

[0105] B Operation

[0106] P Operational phase

Claims

PATENT CLAIMS 1. Device (14) for displaying changeable information (11,2) on an electronic paper (6) in a passenger cabin (2) of a vehicle (4), - with electronic paper (6), - with a control unit (16) that controls the paper (6) in the operation (B) and has a usage variable (V), - wherein the usage variable (V) has at least one first usage value (N1) if the paper (6) is potentially visible to passengers (12) in the passenger cabin (2), and - the usage variable (V) has at least one second usage value (N2) if the paper (6) is not visible to passengers (12) in the passenger cabin (2) and / or if it can be assumed that passengers (12) will not be disturbed by the performance of a recreation process (E) on the paper (6), - wherein the control unit (16) is configured to, - in response to a request (A) to change the information displayed on the paper (6) (11 ,2) from a first (11) to a second piece of information (I2): - to check which of the usage values ​​(N1 ,2) is currently available, and: - if the first use value (N1) is currently available: - to move the paper (6) to display the second information (I2) immediately after the first information (11) without an intermediate recovery process (E).

2. Device (14) according to claim 1 , characterized in that the paper (6) is a paper capable of at least three colors.

3. Device (14) according to claim 2, characterized in that the paper (6) contains a plurality of display elements (24), each containing particles of different colors, wherein the color of the display element (24) depends on the layering of the particles, wherein the recovery process (E) is one in which the particles are subjected to multiple successive re-layerings and thus The accompanying changing display of different colors and / or brightnesses is arranged according to a predetermined layering in the display element (24).

4. Device (14) according to one of the preceding claims, characterized in that the control unit (16) is configured to: - in response to requirement (A): - if the second use value (N2) is currently available: - to first move the paper (6) to the recovery process (E), - and only then to access the paper (6) to display the second piece of information (I2).

5. Device (14) according to one of the preceding claims, characterized in that the control unit (16) is configured to: - to check whether at least two different pieces of information (11,2) have been displayed up to the current time without an intervening recovery process (E), - in this case, to target the paper (6) at a later time (ts) for a recovery process (E).

6. Device (14) according to claim 5, characterized in that the later time (ts) is one at which the second use value (N2) is present.

7. Device (14) according to one of the preceding claims, characterized in that the utility value (N1 ,2) is determined on the basis of a current operating phase (P) of the vehicle (4).

8. Device (14) according to one of the preceding claims, characterized in that the vehicle (4) is an aircraft.

9. Device (14) according to one of the preceding claims, characterized in that - 19 - the control unit (16) is at least part of a cabin management system (26) for the passenger cabin (2).

10. Method for operating the device (14) according to any one of the preceding claims, wherein: - in response to the request (A) to change the information (11 ,2) displayed on the paper (6) from a first (11) to a second information (I2): - the control unit (16) checks which of the usage values ​​(N1 ,2) is currently available, and: - if the first use value (N1) is currently available: - the paper (6) is targeted to display the second information (12) immediately after the first information (11) without an intermediate recovery process (E).

Images