Single-shaft peep-proof display device

Abstract

The utility model relates to the field of display devices, in particular to a single-axis peep-proof display device which comprises a displayer used for displaying images and a peep-proof layer arranged on the displayer and further comprises a first polarized light layer, the first polarized light layer is attached to the outer side face of the displayer, and a polarized light axis in the first axial direction is arranged on the first polarized light layer. The peep-proof layer comprises a first transparent plate, a second transparent plate, a liquid crystal layer, a first alignment layer and a second alignment layer; the liquid crystal layer is formed by nematic liquid crystals doped with dark or black dichroic dye; the first alignment layer and the second alignment layer have a vertical alignment effect on liquid crystal molecules of the liquid crystal layer, so that the liquid crystal molecules and dye molecules are vertically arranged; the first transparent plate and the second transparent plate are arranged on the outer side of the first alignment layer and the outer side of the second alignment layer respectively, the single-shaft peep-proof display device can also be used as an automobile co-driver position displayer, and a driver is prevented from being distracted to watch display content of a co-driver position.

Description

Technical Field

[0001] The utility model relates to the field of display devices, and more specifically, to a single-axis anti-peeping display device. Background Art

[0002] At present, some display devices on the market do not have a single-axis anti-peeping function, that is, when viewed from one axial viewing angle (referred to as the "left-right viewing angle" in this specification), it is difficult to see the displayed content clearly, while from the front viewing angle and the other axial viewing angle (referred to as the "up-down viewing angle" in this specification), the displayed content can be seen clearly. This single-axis anti-peeping display device can see the content clearly when viewed from the top and bottom viewing angles, thereby ensuring viewing comfort, while the left-right viewing angle plays an anti-peeping role. Therefore, it is necessary to propose a single-axis anti-peeping display device that solves the above problems. Utility Model Content

[0003] The utility model provides a single-axis anti-peeping display device to overcome at least one defect (deficiency) of the prior art.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows: a single-axis anti-peeping display device includes a display for displaying an image and an anti-peeping layer arranged on the display, and also includes

[0005] A first polarizing layer, wherein the first polarizing layer is attached to an outer side of the display, and the first polarizing layer is provided with a polarizing axis along a first axial direction;

[0006] The anti-peeping layer includes a first transparent plate, a second transparent plate, a liquid crystal layer, a first alignment layer, and a second alignment layer;

[0007] The liquid crystal layer is composed of nematic liquid crystal doped with dark or black dichroic dye;

[0008] The first alignment layer and the second alignment layer have a vertical alignment effect on the liquid crystal molecules in the liquid crystal layer, so that the liquid crystal molecules and the dye molecules are arranged vertically;

[0009] The first transparent plate and the second transparent plate are respectively arranged on the outside of the first alignment layer and the second alignment layer. Through such an arrangement, the single-axis anti-peeping display device can be used in public areas, such as as a display for high-speed railways and airplanes, to protect privacy and avoid mutual interference. It can also be used as a display for the co-pilot seat of a car to prevent the driver from being distracted by watching the display content on the co-pilot seat.

[0010] Furthermore, the thickness of the liquid crystal layer is not less than 5 μm, so that it can dissolve enough dyes to ensure the absorption function of the dyes.

[0011] Furthermore, the thickness of the liquid crystal layer is not greater than 10 μm, so that its optical path difference is small, which reduces the influence of the birefringence of the liquid crystal layer on the polarization state, thereby affecting its dye absorption function.

[0012] Furthermore, the weight ratio of the dark or black dichroic dye in the liquid crystal layer is not less than 2%, thereby ensuring the absorption function of the dye, while not requiring a liquid crystal layer of excessive thickness, reducing the effect of the birefringence of the liquid crystal layer on the polarization state.

[0013] Furthermore, the birefringence of the liquid crystal layer is not greater than 0.15, so that the effect on polarization is small, thereby ensuring its anti-peeping function.

[0014] Furthermore, the birefringence of the liquid crystal layer is not greater than 0.10, so that the effect on polarization is small, thereby ensuring its anti-peeping function.

[0015] Furthermore, the anti-peeping layer is fully bonded to the display through a transparent adhesive layer. Since the anti-peeping layer is fully bonded to the display through a transparent adhesive layer, there is no air layer between the display and the anti-peeping layer, and thus there is no air layer reflection, thereby avoiding affecting the display effect.

[0016] Furthermore, the first transparent plate and the second transparent plate are both glass substrates. Since the first transparent plate and the second transparent plate made of glass substrates have no birefringence, they will not affect polarization, thereby ensuring their anti-peeping function.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0018] The single-axis anti-peeping display device disclosed by the utility model can be used in public areas, such as as a display for high-speed trains and airplanes, to protect privacy and avoid mutual interference. It can also be used as a display for the co-pilot seat of a car to prevent the driver from being distracted by viewing the display content on the co-pilot seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the single-axis anti-peeping display device in the utility model.

[0020] Figure 2 It is a cross-section of the display device along the first axial direction of the utility model, and its anti-peeping principle diagram along the first axial viewing angle (left and right viewing angle), that is, the polarization direction of the left and right viewing angle light has a horizontal component with the dye molecules and can be absorbed, and the greater the viewing angle inclination, the greater the component.

[0021] Figure 3It is a cross-section of the display device perpendicular to the first axis in the utility model and a principle diagram of no privacy protection at the viewing angles perpendicular to the first axis (upper and lower viewing angles), that is, the polarization direction of the light at the upper and lower viewing angles is perpendicular to the dye molecules and there is no horizontal component.

[0022] Figure 4 It is a schematic diagram of the lateral anti-peeping effect of the display device in the utility model, wherein the left and right viewing angles become darker, while the front and up and down viewing angles remain unchanged.

[0023] In the figure, 1 is a display, 2 is an anti-peep layer, 3 is a first polarizing layer, 4 is a polarizing axis, 5 is a first transparent plate, 6 is a second transparent plate, 7 is a liquid crystal layer, 8 is a first alignment layer, 9 is a second alignment layer, 10 is a liquid crystal molecule, 11 is a dye molecule, and 12 is a transparent adhesive layer. DETAILED DESCRIPTION

[0024] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, which can be said to be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1-4As shown, a single-axis anti-peeping display device includes a display 1 for displaying images and an anti-peeping layer 2 arranged on the display, and also includes a first polarizing layer 3, the first polarizing layer is attached to the outer side of the display, and a polarizing axis 4 along the first axial direction is provided on the first polarizing layer; the anti-peeping layer includes a first transparent plate 5, a second transparent plate 6, a liquid crystal layer 7, a first alignment layer 8, and a second alignment layer 9; the liquid crystal layer is composed of nematic liquid crystal doped with dark or black dichroic dyes; the first alignment layer and the second alignment layer have a vertical alignment effect on the liquid crystal molecules 10 of the liquid crystal layer, so that the liquid crystal molecules and the dye molecules 11 are arranged vertically; the first transparent plate and the second transparent plate are respectively arranged on the outer sides of the first alignment layer and the second alignment layer. Through such an arrangement, the single-axis anti-peeping display device can be used in public areas, such as as a display of a high-speed train or an airplane, to protect privacy and avoid mutual interference, and can also be used as a display for the co-pilot seat of a car to prevent the driver from being distracted to watch the display content of the co-pilot seat.

[0027] In the utility model, the thickness of the liquid crystal layer is not less than 5 μm, so that it can dissolve enough dyes to ensure the dye absorption function. In addition, the thickness of the liquid crystal layer can also be no more than 10 μm, so that its optical path difference is small, reducing the influence of the birefringence of the liquid crystal layer on the polarization state, thereby affecting its dye absorption function. Among them, the weight ratio of the dark or black dichroic dye added to the liquid crystal layer is not less than 2%, so that it can ensure the dye absorption function. At the same time, there is no need to use a liquid crystal layer with too large thickness, reducing the influence of the birefringence of the liquid crystal layer on the polarization state.

[0028] Among them, the birefringence of the liquid crystal layer is not greater than 0.15, so its effect on polarization is small, thereby ensuring its anti-peeping function. In addition, the birefringence of the liquid crystal layer can also be no greater than 0.10, so its effect on polarization is small, thereby ensuring its anti-peeping function.

[0029] In the utility model, the anti-peeping layer is fully bonded to the display through the transparent adhesive layer 12. Since the anti-peeping layer is fully bonded to the display through the transparent adhesive layer, there is no air layer between the display and the anti-peeping layer, and thus there is no air layer reflection, thereby avoiding affecting the display effect. Among them, the first transparent plate and the second transparent plate are both glass substrates. The first transparent plate and the second transparent plate made of glass substrates have no birefringence and therefore will not affect the polarization, thereby ensuring their anti-peeping function.

[0030] In the figure, the description of the positional relationship is only for illustrative purposes and cannot be understood as a limitation of this patent; obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limitations on the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A single-axis anti-peeping display device, comprising a display for displaying an image and an anti-peeping layer arranged on the display, characterized in that: Also includes A first polarizing layer, wherein the first polarizing layer is attached to an outer side of the display, and the first polarizing layer is provided with a polarizing axis along a first axial direction; The anti-peeping layer includes a first transparent plate, a second transparent plate, a liquid crystal layer, a first alignment layer, and a second alignment layer; The liquid crystal layer is composed of nematic liquid crystal doped with dark or black dichroic dye; The first alignment layer and the second alignment layer have a vertical alignment effect on the liquid crystal molecules in the liquid crystal layer, so that the liquid crystal molecules and the dye molecules are arranged vertically; The first transparent plate and the second transparent plate are respectively disposed outside the first alignment layer and the second alignment layer.

2. The single-axis anti-peeping display device according to claim 1, characterized in that: The thickness of the liquid crystal layer is not less than 5 μm.

3. The single-axis anti-peeping display device according to claim 1, characterized in that: The thickness of the liquid crystal layer is no more than 10 μm.

4. The single-axis anti-peeping display device according to claim 1, characterized in that: The weight ratio of the dark or black dichroic dye in the liquid crystal layer is not less than 2%.

5. The single-axis anti-peeping display device according to claim 1, characterized in that: The birefringence of the liquid crystal layer is not greater than 0.

15.

6. The single-axis anti-peeping display device according to claim 1, characterized in that: The birefringence of the liquid crystal layer is not greater than 0.

10.

7. The single-axis anti-peeping display device according to claim 1, characterized in that: The anti-peeping layer is completely attached to the display through a transparent adhesive layer.

8. The single-axis anti-peeping display device according to claim 1, characterized in that: The first transparent plate and the second transparent plate are both glass substrates.

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