Display for automotive

Abstract

Disclosed is a display for automotive applications, comprising a liquid crystal (LCD) display or a micro LED display or an OLED display and, at least one privacy cell. The privacy cell comprises two pairs of both a polarizer film and a retarding film and an LC layer arranged between said two pairs.

Description

[0001] Display for automotive

[0002] The present invention relates to a display for automotive comprising at least one privacy cell arrangement so that the display can be operated in a sharing mode for displaying in a rather wide viewing angle range and in a privacy mode for displaying in a viewing angle range which is narrower than in the sharing mode.

[0003] US-A-2019 / 0353943 discloses a liquid crystal private device comprising a light control film and at least one privacy cell comprising a LC layer sandwiched by two pairs of both a polarizer film and a retarding film. A certain disadvantage of this known design is that a light control film is required in addition to the privacy cell. This complicates the construction of the privacy cell.

[0004] It is an object of the present invention to provide a display for automotive having an improved privacy cell arrangement of high efficiency.

[0005] To this end, according to the invention, the efficiency of the privacy cell arrangement is improved through selective polarization effect by which the transmissivity is improved through using the optical efficiency of the system.

[0006] The major features of the invention are:

[0007] Increase in optical efficiency of the privacy cell arrangement for display application by using a polarization optimized state of the system, increase in privacy effect of the privacy cell arrangement for display application by using a polarization optimized state of the system, decrease color deviation between privacy mode and sharing mode by using a polarization optimized state of the system.

[0008] According to the invention, a display for automotive applications is provided comprising

[0009] According to a first aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer, and wherein the first and second privacy cells are designed so as to comprise two pairs of both a polarizer film and a retarding film with the respective LC layer arranged between said two pairs.

[0010] According to a second aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer, and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise two retarding films with the LC layer arranged there between and one polarizer film arranged at that side of the LC layer which side is facing away from the first privacy cell. According to a third aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise two polarizer films with the LC layer arranged therebetween.

[0011] According to a fourth aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise one polarizer film arranged at that side of the LC layer which side is facing away from the first privacy cell.

[0012] According to a preferred embodiment of the present invention, the second privacy cell is free of any retarding film.

[0013] According to a fifth aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise one pair of both a polarizer film and a retarding film at the one side of the LC layer and a polarizer film at the opposite other side of the LC layer.

[0014] According to a sixth aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise one retarding film arranged at one side of the LC layer or one pair of a polarizer film and a retarding film arranged at one side of the LC layer.

[0015] According to an advantageous embodiment of the present invention, at least one further privacy cell is arranged above and / or below the first and second privacy cells, wherein the at least one further privacy cell is designed substantially the same as the first privacy cell or the second privacy cell and may comprise one or two polarizer films and one or two retarding films or can be free of any retarding films and wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layers of at least two privacy cells are TN LC layers and the LC layer of the at least one further privacy cell is an ECB LC layer or the LC layers of at least two privacy cells are ECB LC layers and the LC layer of the at least one further privacy cell is a TN LC layer.

[0016] In another preferred embodiment of the present invention, still at least one additional privacy cell is provided with an LC layer comprising a known technology which is different from a TN LC layer and an ECB LC layer and, e.g., comprises an HAN LC layer or a VA LC layer.

[0017] In a still further embodiment of the present invention, in case that the display is designed as an LCD display, a direct-lit or edge-lit backlight unit is provided wherein the first and second privacy cells are arranged between the backlight unit and the LCD display.

[0018] In still a further preferred embodiment of the present invention, the LCD display comprises two polarizer films with an LC layer there between.

[0019] It could advantageous that one of the polarizer films of the LCD display and the privacy cell arranged closest to the LCD display and facing each other, is omitted.

[0020] According to another embodiment of the present invention, in case that the display is designed as a micro-LED display or an OLED display, the first and / or the second privacy cell is / are arranged at the front side of the display or within the display, e.g. underneath the circular polarizer of an OLED display.

[0021] In case that between two adjacent privacy cells two polarizer films are present, with one associated to each of the privacy cells, respectively, one of these two polarizer films is omitted as a further advantageous embodiment.

[0022] According to the present invention, the privacy cell arrangement comprises at least two privacy cells each having an LC layer according to the TN mode or ECB mode or a combination of both and at least one polarizer film and at least one retarding film. These two films can be arranged adjacent each other at one side of the LC layer or at both sides of the LC layer. Also in one of the privacy cells merely an LC layer and a polarizer film and / or a retarding film is arranged adjacent the LC layer.

[0023] Due to the use of TN LC layers or ECB LC layers or a combination of both for the privacy cells of the privacy cell arrangement according to the invention, the privacy mode can be realized without a light control film as part of the privacy cell arrangement or as part of the display according to the invention using the privacy cell arrangement according to the present invention. As being evident from the above, according to the invention, a plurality of different LC layers, polarizer films and / or retarding films are suggested as long as the LC layers are TN LC layers or ECB LC layers or a combination of both.

[0024] In addition to the at least two privacy cells described above, the privacy cell arrangement can also comprise further privacy cells having LC layers of a mode different from the TN mode and / or the ECB mode.

[0025] In a further aspect of the present invention, within the stack of the LCD display and the privacy cell arrangement, between adjacent privacy cells and / or between the LCD display (in case the information display is designed as an LCD display) and the adjacent privacy cell, two polarizer films can be present. Assuming that the polarizer direction of the light transmitted from the one privacy cell to the other adjacent privacy cell or from the privacy cell adjacent to the LCD display to the LCD display fits with the required polarizer direction of the light reaching the adjacent privacy cell or the LCD display, one of the polarizer films can be omitted.

[0026] As being evident from the above, the present invention provides an optical stack of layers for the display and layers and films for the privacy cells. Between adjacent privacy cells and between the display and the adjacent privacy cell gaps could be arranged or the individual components (privacy cells and display) are optically bonded to each other.

[0027] The present invention of the privacy cell arrangement can be used both in displays having back light units or can be used in displays of a technology not using back light units like e.g. micro-LED displays or OLED displays.

[0028] In another aspect of the present invention, a display for automotive applications is provided comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and

[0029] According to one aspect of the invention, the display in case that it is designed as an LC display, is provided with a direct-lit or an edge-lit backlight unit wherein the at least one privacy cell is arranged between the backlight unit and the LC display.

[0030] According to another aspect of the invention, the display in case that it is designed as a micro-LED display or an OLED display, the at least one privacy cell is arranged at the front side of the display.

[0031] Typically, in the display according to the invention an alignment film is associated to each of said pairs, respectively.

[0032] In case of several stacked privacy cells, at least one or all of them is / are designed according to example 1 or wherein at least one of the several stacked privacy cells is free of retarding films i.e. comprises the LC layer, the said two pairs and the two alignment films, if present.

[0033] In the following, specific embodiments of the invention are briefly described:

[0034] 1. Display for automotive applications, comprising an LC or micro-LED or OLED display, at least one privacy cell layer, and wherein the privacy cell layer comprises two alignment layers, two polarization films and a retarding layer associated to each pair of alignment layer and polarization film. Display according to example 1, wherein in case that the display is designed as an LC display, a direct-lit or edge-lit backlight unit is provided. Display according to example 1 or 2, wherein in case of several stacked privacy cells, i.e. two or three, at least one or all is / are designed so as to comprise the two pairs of both a polarizer film and a retarding film or wherein at least one of the several stacked privacy cells is free of the retarding films, i.e. comprises the LC layer and two polarization films and, if provided, two alignment films. Display for automotive applications, comprising a liquid crystal (LC) display or a micro-LED display or an OLED display and, at least one privacy cell, wherein the privacy cell comprises two pairs of both a polarizer film and a retarding film and an LC layer arranged between said two pairs. Display according to example 4, wherein in case that the display is designed as an LC display, a direct-lit or edge-lit backlight unit is provided wherein the at least one privacy cell is arranged between the backlight unit and the LC display. Display according to example 4, wherein in case that the display is designed as a micro-LED display or an OLED display, the at least one privacy cell is arranged at the front side of the display. Display according to any one of examples 4 to 6, wherein an alignment film is associated to each of said pairs, respectively. Display according to any one of examples 4 to 7, wherein in case of several, i.e. two or three, stacked privacy cells, at least one or all of them is / are designed so as to comprise the two pairs of both a polarizer film and a retarding film or wherein at least one of the several stacked privacy cells is free of the retarding films, i.e. comprises the LC layer and two polarization films and, if provided, two alignment films.

[0035] Both an LC display which could be used in the invention and the privacy cell or cells according to the invention comprise an LC layer. However, the LC layer of the display is "segmented" in that it comprises a plurality of pixels which could be individually controlled and independently from each other by known electrode structures and associated controllers, while the LC layer of the privacy cell according to the invention need not have this structure and in a certain sense could be regarded as one (large) pixel with associated controller but according to a certain aspect of the invention could also be segmented if desired so as to provide for privacy mode and sharing mode independently from each other at the same time for different areas of the display surface.

[0036] The present invention will be described in more detail referring to the drawing in which

[0037] Fig. 1 shows TN cell asymmetric transmission properties under crossed polarizers i.e. natural asymmetric properties due to birefringence properties of the TN aligned mode (wherein an ISO Image of on and off TN cell is also shown),

[0038] Fig. 2 shows an ECB cell transmission under crossed polarizers. Two minima along the horizontal axis,

[0039] Fig. 3 shows the wavelength dependency of an LC Mode under crossed polarizer for privacy application,

[0040] Fig. 4 shows the wavelength dependency of an LC Mode under crossed polarizer and double retarder for privacy cell according to the invention and

[0041] Fig. 5 shows stacked structures for privacy application using the double retarder compensation system according to the invention in a single cell or in at least one cell of a plurality of privacy cells , wherein embodiments are shown having at least two privacy cells with cell 1 and cell 2 can be any of TN LC mode or ECB LC mode or a combination of TN and ECB LC mode and wherein the basis display intended for displaying information in the privacy mode or in the sharing mode as an example refers to an active matrix display or a back light display with its own standard single retarder film.

[0042] Today state of the art switchable privacy technology which includes a sharing and a privacy mode on demand is based on liquid crystal (LC) technology and includes two or more LC cells stacked one over the other. A combination of twisted nematic (TN), electrically controlled birefringence (ECB) or vertically aligned (VA), Hybrid aligned Nematic (HAN) have been reported. Here, the technology fundamentally take an advantage of the natural asymmetric or asymmetric transmission of a monochrome cell mode which work with a single on-off switching. The TN cell under crossed polarizers can show then an asymmetric transmission profile under an electrical field. Fig. 1 relates to TN cell asymmetric transmission properties under crossed polarizers and shows natural asymmetric properties due to birefringence properties of the TN aligned mode (additional ISO Image of on and off TN cell so shown).

[0043] The right diagram of Fig. 1 at its top portion shows the maximum light intensity and at its bottom portion shows the minimum light intensity.

[0044] On the other hand, the ECB cell shows a symmetric retardation, with max transmission on the center and less transmission at specific positions (see Fig. 2 which shows an ECB cell transmission under crossed polarizers. Two minima are observed along the horizontal axis).

[0045] By stacking at least two LC mode displays as the privacy cells (TN-TN, TN-ECB, ECB-ECB for instance), the two transmission characteristic overlaps giving an effective transmission curve which leads to an asymmetric transmission curve as reported in the prior art literature. Here, the asymmetric mode occurs under voltage in the two cells (Privacy Mode) while the sharing mode appears when no voltage is applied to the cells. In general it is also possible to design the cells so that asymmetric mode occurs when no voltage is applied to the cells (Privacy Mode) while the sharing mode appears under voltage in the two cells. The main inconvenience in these known approaches is the use of several polarizers which cuts the light transmission rate of the cell dramatically. Here, the liquid crystal mode and its transmission distribution profile over several viewing angles intrinsically depends on the wavelength due to the wavelength dependency of the polarizers and liquid crystal material. A polarization analysis based on polarization Poincare sphere shows that under crossed polarizer and for a specific retardation of the LC mode, the final linear polarization rotation is not identical for two different wavelengths (e.g. for red and blue as shown as examples ).

[0046] To increase the transmission rate of the cell in privacy mode, a new privacy cell design is proposed which allows to increase the transmission ratio for specific wavelengths hence increasing the transmission spectrum in the visible range 400-800 nm.

[0047] In active matrix liquid crystals (AMLCD), i.e. in AMLCDs in which each LCD pixel can be controlled by a corresponding thin film transistor of a matrix of thin film transistors, the use of retardation films allows to reduce light leakage over viewing angle as well as to increase or modulate the transmission rate over specific viewing angle positions. Usually, the retardation of those films can be and is calculated and designed to a specific retardation in nm. It is well known that a retarder placed on the bottom and on the top of the LC and under the polarizes brings an improvement in terms of light leakage and color performance over viewing angle in active matrix displays. The present invention takes advantage of this effect but now for the privacy cell in order to improve the privacy effect over the large viewing angles (TN or other mode is applicable).

[0048] In addition, another important effect is that the double retarder system will also compensate in the perpendicular angular position for more wavelengths according to the polarization Poincare sphere since the new system acts symmetrically on the total retardation of the system (see Fig. 4). Hence, a retardation combination of retarder 1 (Anl), LC retardation (AnLC defined by LC birefringence and cell gap), and retarder 2 (An2) as shown e.g. in Fig. 4 is going to give an effective transmission on the visible range 400-800 nm. With an optimized balance design Anl + AnLC + An2, the transmission spectrum in the normal viewing direction can be improved.

[0049] Having in sum three independent tunable parameters (Anl + AnLC + An2) by using two retardation films it is possible to find a parameter set which has higher transmission for three primary wavelengths which correspond to the primary colors RGB of an LC display. This higher transmission can be explained by the movement on the Poincare sphere because also this movement can become better tuned by having independent tunable parameters instead of two independent tunable parameters which is state of the art.

[0050] This invention is not limited to the visible light spectrum, it can also become adapted to the IR or UV wavelength range.

[0051] The privacy cells can also become segmented so that different areas of the display surface can be in sharing mode and privacy mode independently from each other and at the same time (see WO-A-2023 / 232969).

[0052] Using the segmented approach which is matched in IR region this could be used for medical investigation.

[0053] Based on these features and focused on privacy applications in displays as examples, the stacked structures of Fig. 5 according to designs 1 to 5 comprising double retarder systems (for at least one of the privacy cells) are proposed which will improve privacy for e.g. the co-driver (less light leakage) over the viewing angle limited, as desired, in the privacy mode, and increase transmission on the normal direction towards the co-driver. As can be seen e.g. in designs 2 and 3, one of the privacy cells is free of any retarding film. According to design 4 of Fig. 5, one of the privacy cells only comprises one polarizer film with the polarizer film facing the polarizer film of the adjacent privacy cell being omitted. This privacy cell also is free of a retarding film. In the design 5 of Fig. 5, one of the privacy cells comprises only one retarding film above or below the LC layer and no polarizer films meaning that the polarization direction of the light coming from the other privacy cell is already suitable for passing the privacy cell 1 and light coming from privacy cell 1 and reaching the LCD display also has the polarization orientation suitable for the LCD display. It is even possible that for all designs of Fig. 5 the lower polarizer of the LCD display could be omitted as long as the polarization direction of the light reaching the LCD display is suitable and fits to what is required by the LCD display.

[0054] According to the invention, the optical stack of the privacy cell arrangement can comprise one layer of an LC based privacy cell or two or three or even more layers. The optical stack according to all of these variants can be used in combination with an LC display and a backlight unit (BLU) designed as director edge-lit, wherein the optical stack is a arranged underneeth the LC display, i.e. between the BLU and the LC display, or in combination with an actively light emitting display comprising e.g. micro LEDs or OLEDs in which the optical stack is arranged above the display. The optical stack proposed as the privacy cell arrangement according to the invention can include different LC modes (TN and all the derivates of TN, ECB and all derivates of ECB) and can include in addition other LC modes meaning further privacy cells with LC modes different from TN and all derivates of TN or ECB and all derivates of ECB. In the optical stack, all the cells can be of the same LC mode or of different LC modes or mixtures of the same and different LC modes.

Claims

CLAIMS1. Display for automotive applications, comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer, and wherein the first and second privacy cells are designed so as to comprise two pairs of both a polarizer film and a retarding film with the respective LC layer arranged between said two pairs.

2. Display for automotive applications comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer, and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise two retarding films with the LC layer arranged there between and one polarizer film arranged at that side of the LC layer which side is facing away from the first privacy cell.

3. Display for automotive applications comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise two polarizer films with the LC layer arranged therebetween.

4. Display for automotive applications comprising, a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise one polarizer film arranged at that side of the LC layer which side is facing away from the first privacy cell.

5. Display according to claim 3 or 4 wherein the second privacy cell is free of any retarding film.

6. Display for automotive applications comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer and wherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise one pair of both a polarizer film and a retarding film at the one side of the LC layer and a polarizer film at the opposite other side of the LC layer.

7. Display for automotive applications comprising a liquid crystal (LCD) display or a micro-LED display or an OLED display and, a first privacy cell and a second privacy cell stacked on top of each other and each comprising a liquid crystal (LC) layer, wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layer of one of the privacy cells is a TN LC layer and the LC layer of the other privacy cell is an ECB LC layer andwherein the first privacy cell is designed so as to comprise two pairs of both a polarizer film and a retarding film with the LC layer arranged between said two pairs and wherein the second privacy cell is designed so as to comprise one retarding film arranged at one side of the LC layer or one pair of a polarizer film and a retarding film arranged at one side of the LC layer.

8. Display according to any one of claims 1 to 7, wherein at least one further privacy cell is arranged above and / or below the first and second privacy cells, wherein the at least one further privacy cell is designed substantially the same as the first privacy cell or the second privacy cell and may comprise one or two polarizer films and one or two retarding films or can be free of any retarding films and wherein the LC layer of each privacy cell is a TN LC layer or the LC layer of each privacy cell is an ECB LC layer or the LC layers of at least two privacy cells are TN LC layers and the LC layer of the at least one further privacy cell is an ECB LC layer or the LC layers of at least two privacy cells are ECB LC layers and the LC layer of the at least one further privacy cell is a TN LC layer.

9. Display according to any one of claims 1 to 8, wherein still at least one additional privacy cell is provided with an LC layer comprising a known technology which is different from a TN LC layer and an ECB LC layer and, e.g., comprises an HAN LC layer or a VA LC layer.

10. Display according to any one of claims 1 to 9, wherein in case that the display is designed as an LCD display, a direct-lit or edge-lit backlight unit is provided wherein the first and second privacy cells are arranged between the backlight unit and the LCD display.

11. Display according to claim 9, wherein the LCD display comprises two polarizer films with an LC layer there between.

12. Display according to claim 10, wherein one of the polarizer films of the LCD display and the privacy cell arranged closest to the LCD display and facing each other, is omitted.

13. Display according to any one of claims 1 to 7, wherein in case that the display is designed as a micro-LED display or an OLED display, the first and / or the second privacy cell is / are arranged at the front side of the display or within the display.

14. Display according to any one of claims 1 to 13, wherein in case that between two adjacent privacy cells two polarizer films are present, with one associated to each of the privacy cells, respectively, one of these two polarizer films is omitted.

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