阅读说明：本技术 光学膜层及显示装置 (Optical film layer and display device ) 是由 窦虎 吴梓平 俞刚 于 2020-07-08 设计创作，主要内容包括：本发明提供了一种光学膜层及显示装置。所述光学膜层中包括第一电极层、第二电极层、第一液晶层、第二液晶层以及填充层。所述第一液晶层和所述第二液晶层均设于所述第一电极层朝向所述第二电极层的一面。以所述第一电极层朝向所述填充层的一面为基准面,所述第二液晶层的高度小于所述第一液晶层的高度。(The invention provides an optical film layer and a display device. The optical film layer comprises a first electrode layer, a second electrode layer, a first liquid crystal layer, a second liquid crystal layer and a filling layer. The first liquid crystal layer and the second liquid crystal layer are both arranged on one surface, facing the second electrode layer, of the first electrode layer. And taking one surface of the first electrode layer facing the filling layer as a reference surface, wherein the height of the second liquid crystal layer is smaller than that of the first liquid crystal layer.)

1. An optical film comprising

A first electrode layer and a second electrode layer;

the first liquid crystal layer and the second liquid crystal layer are arranged on one surface, facing the second electrode layer, of the first electrode layer;

a filling layer filled between the first electrode layer and the second electrode layer and used for packaging the first liquid crystal layer and the second liquid crystal layer;

and taking one surface of the first electrode layer facing the filling layer as a reference surface, wherein the height of the second liquid crystal layer is smaller than that of the first liquid crystal layer.

2. The optical film layer of claim 1 wherein the first liquid crystal layer and the second liquid crystal layer are filled with liquid crystal molecules; the liquid crystal molecules are rod-shaped liquid crystal molecules.

3. The optical film according to claim 2, wherein when the first electrode layer and the second electrode layer are free of voltage, the long axes of the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are parallel to a surface of the first electrode layer close to the liquid crystal layer.

4. The optical film according to claim 2, wherein when the voltage between the first electrode layer and the second electrode layer is 2 to 8 v, the liquid crystal molecules in the first liquid crystal layer are deflected, and the long axes of the liquid crystal molecules in the first liquid crystal layer are perpendicular to a surface of the first electrode layer facing the filling layer.

5. The optical film according to claim 2, wherein the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are deflected when the voltage between the first electrode layer and the second electrode layer is 10 to 20 v, and the long axes of the liquid crystal molecules are perpendicular to a surface of the first electrode layer facing the filling layer.

6. The optical film layer of claim 1 further comprising:

the first alignment layer is arranged on one surface, facing the first liquid crystal layer and the second liquid crystal layer, of the first electrode layer;

and the second orientation layer is coated on one surface of the first liquid crystal layer and the second liquid crystal layer, which is far away from the first electrode layer.

7. The optical film according to claim 1, wherein each of the first electrode layer and the second electrode layer has a conductive film and a transparent substrate, and the conductive film is disposed on a surface of the transparent substrate adjacent to the first liquid crystal layer and the second liquid crystal layer.

8. The optical film of claim 1 wherein the index of refraction of the fill layer is the same as the extraordinary refractive index of the liquid crystal molecules in the first and second liquid crystal layers.

9. A display device, comprising: the optical film layer of any of claims 1-8, and

and the display panel is provided with a display surface, and the display surface faces the optical film layer.

10. The display device according to claim 9, wherein the display panel comprises:

a backlight module having a light emitting surface;

the first polaroid is arranged on the light emitting surface of the backlight module;

the liquid crystal box is arranged on one surface of the first polaroid, which is far away from the backlight module;

the color filter is arranged on one surface of the liquid crystal box, which is far away from the first polaroid;

the second polaroid is arranged on one surface of the color filter, which is far away from the liquid crystal box;

the optical film layer is arranged on one surface of the second polarizer far away from the color filter.

Technical Field

The invention relates to the field of display equipment, in particular to an optical film layer and a display device.

Background

In recent years, with the progress of display technology, the viewer has increasingly demanded display quality (such as image resolution and color saturation) of the display. However, as the resolution of the display is improved, the finer the display screen, the smaller the pixel size, and the worse the brightness at large viewing angle, which is a technical problem to be solved urgently for the ultra-high definition display.

In the prior art, the light of a positive visual angle is modulated to a large visual angle by combining the optical film layer structure, so that the display brightness of the large visual angle is increased. Although this technique can improve the brightness of the display image when the bright display is viewed at a large viewing angle, it also has an effect on the display at a front viewing angle, which results in a loss of the brightness at the front viewing angle and a significant reduction in the contrast at the front viewing angle.

Disclosure of Invention

The invention aims to provide an optical film layer and a display device, which solve the problems that the brightness and the contrast at a front viewing angle are reduced when the viewing angle is increased in the optical film layer in the prior art.

In order to achieve the above object, the present invention provides an optical film layer, which includes a first electrode layer, a second electrode layer, a first liquid crystal layer, a second liquid crystal layer, and a filling layer. The first liquid crystal layer and the second liquid crystal layer are both arranged on one surface, facing the second electrode layer, of the first electrode layer. The filling layer is filled between the first electrode layer and the second electrode layer and used for packaging the first liquid crystal layer and the second liquid crystal layer.

And taking one surface of the first electrode layer facing the filling layer as a reference surface, wherein the height of the second liquid crystal layer is smaller than that of the first liquid crystal layer.

Further, the first liquid crystal layer and the second liquid crystal layer are filled with liquid crystal molecules. The liquid crystal molecules are rod-shaped liquid crystal molecules.

Further, when no voltage exists between the first electrode layer and the second electrode layer, the long axes of the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are parallel to one surface, close to the liquid crystal layer, of the first electrode layer.

Further, when the voltage between the first electrode layer and the second electrode layer is 2-8 volts, the liquid crystal molecules in the first liquid crystal layer are deflected, and the long axes of the liquid crystal molecules in the first liquid crystal layer are perpendicular to one surface of the first electrode layer facing the filling layer.

Further, when the voltage between the first electrode layer and the second electrode layer is 10-20 volts, liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are deflected, and long axes of the liquid crystal molecules are perpendicular to one surface of the first electrode layer facing the filling layer.

Furthermore, the optical film layer further comprises a second electrode layer, the first electrode layer and the second electrode layer are respectively provided with a conductive film and a transparent substrate, and the conductive film is arranged on one surface of the transparent substrate, which is close to the first liquid crystal layer and the second liquid crystal layer.

Further, the optical film layer further includes a first alignment layer and a second alignment layer. The first orientation layer is arranged on one surface of the first electrode layer facing the first liquid crystal layer and the second liquid crystal layer. The second orientation layer covers the first liquid crystal layer and the second liquid crystal layer on one surface far away from the first electrode layer.

Further, the refractive index of the filling layer is the same as the extraordinary refractive index of the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer.

The invention also provides a display device, which comprises the optical film layer and a display panel arranged on the optical film layer, wherein the display panel is provided with a display surface facing the optical film layer.

Furthermore, the display panel comprises a backlight module, a first polarizer, a liquid crystal box, a color filter and a second polarizer. The backlight module is provided with a light emitting surface. The first polaroid is arranged on the light emitting surface of the backlight module. The liquid crystal box is arranged on one surface of the first polaroid, which is far away from the backlight module. The color filter is arranged on one surface of the liquid crystal box far away from the first polaroid. The second polaroid is arranged on one surface of the color filter, which is far away from the liquid crystal box. The optical film layer is arranged on one surface of the second polarizer far away from the color filter.

The invention has the advantages that: according to the optical film layer and the display device, the optical film layer realizes sectional control of liquid crystal molecule deflection by designing the two liquid crystal layers with different thicknesses, so that the display device has at least three use modes suitable for different scenes, and the visual angle of the display device can be switched according to different users. Meanwhile, the optical film layer in the invention can also eliminate interference fringes of wide view cornea in the prior art, and improve the quality of display pictures.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a layered structure of a display device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a layered structure of an optical film layer according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a layered structure of an optical film layer according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a layered structure of an optical film layer according to an embodiment of the invention.

The components in the figures are represented as follows:

a display device 1;

a display panel 10; a backlight module 11;

a first polarizing plate 12; a liquid crystal cell 13;

a color filter 14; a second polarizing plate 15;

an optical film layer 20; a first electrode layer 21;

a first liquid crystal layer 22; a second liquid crystal layer 23;

a filler layer 24; a first alignment layer 25;

a second alignment layer 26; a second electrode layer 27;

conductive films 21A, 27A; transparent substrates 21B, 27B;

liquid crystal molecules 30.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the invention provides a display device 1, and the display device 1 is a liquid crystal display device. As shown in fig. 1, the display device 1 includes a display panel 10 and an optical film 20. The display panel 10 has a display panel 10 for providing a display screen. The optical film layer 20 is disposed on the display surface of the display panel 10, and the optical film layer 20 is used for modulating light emitted from the display surface of the display panel 10, reducing interference fringes with a large viewing angle, and improving display picture quality. The display device 1 may be any product or component with a display function, such as a mobile phone, a tablet computer, a notebook computer, a television, and the like.

The display frame includes a backlight module 11, a first polarizer 12, a liquid crystal cell 13, a color filter 14, a second polarizer 15, and an optical film 20. The backlight module 11 has a light emitting surface, and the backlight module 11 is configured to provide a display light source for the display panel 10, where the light source is emitted from the light emitting surface of the backlight module 11. The first polarizer 12 is disposed on the light emitting surface of the backlight module 11, and the first polarizer 12 is used for filtering and converting light emitted by the backlight module 11 into polarized light. The liquid crystal box 13 is disposed on a surface of the first polarizer 12 away from the backlight module 11, and the liquid crystal box 13 is configured to modulate polarized light filtered by the first polarizer 12 to form a display image. The color filter 14 is disposed on a surface of the liquid crystal cell 13 away from the first polarizer 12, and the color filter 14 is configured to filter light modulated by the liquid crystal cell 13, and filter single white light or blue light into color light, so as to form a color display image. The second polarizer 15 is disposed on a surface of the color polarizer, which is away from the liquid crystal cell 13, and the second polarizer 15 is configured to filter and convert the light filtered by the color filter 14 into light that can be seen by human eyes, so that the display panel 10 is developed to display a picture.

The optical film layer 20 is disposed on a surface of the second polarizer 15 of the display panel 10 away from the color filter 14. As shown in fig. 2, the optical film 20 includes a first electrode layer 21, a second electrode layer 27, a plurality of first liquid crystal layers 22, a plurality of second liquid crystal layers 23, a first alignment layer 25, a second alignment layer 26, and a filling layer 24.

The first electrode layer 21 is made of ITO conductive glass, and has a transparent substrate 21B and a conductive film 21A. The conductive film 21A is disposed on a surface of the transparent substrate 21B. The transparent substrate 21B may be a glass substrate, and the conductive film 21A may be an indium tin oxide material.

The first liquid crystal layer 22 and the second liquid crystal layer 23 are both disposed on a surface of the first electrode layer 21, and are both disposed on a surface of the conductive film 21A away from the transparent substrate 21B. Taking a surface of the first electrode layer 21 close to the first liquid crystal layer 22 and the second liquid crystal layer 23 as a reference, that is, a surface of the conductive film 21A far from the transparent substrate 21B as a reference, the height of the first liquid crystal layer 22 is higher than that of the second liquid crystal layer 23. Rod-shaped liquid crystal molecules 30 are filled in both the first liquid crystal layer 22 and the second liquid crystal layer 23.

Wherein, the top width of a single first liquid crystal layer 22 is 3-5um, the bottom width is 13-18um, and the thickness is 14-18 um. The top width of a single second liquid crystal layer 23 is 1-3um, the bottom width is 4-8um, and the thickness is 5-10 um. And a gap is arranged between the adjacent liquid crystal layers, and the width of the gap is 1-3 um.

The filling layer 24 is disposed on the first liquid crystal layer 22 and the second liquid crystal layer 23 on the side away from the first electrode layer 21. As shown in fig. 2, the filling layer 24 fills the gap between the adjacent liquid crystal layers and planarizes a surface of the first liquid crystal layer 22 and the second liquid crystal layer 23 away from the electrode layers. The refractive index of the filling material in the filling layer 24 is the same as the extraordinary refractive index (ne value) of the liquid crystal molecules 30 filled in the first liquid crystal layer 22 and the second liquid crystal layer 23. The filling layer 24 is used to planarize the surfaces of the first liquid crystal layer 22 and the second liquid crystal layer 23, and encapsulate the structure protecting the first liquid crystal layer 22 and the second liquid crystal layer 23, so as to improve the pressure resistance of the optical film layer 20.

The second electrode layer 27 is disposed on a surface of the filling layer 24 away from the first liquid crystal layer 22 and the second liquid crystal layer 23. The second electrode layer 27 and the first electrode layer 21 have the same structural film layer, and the conductive layer in the second electrode layer 27 is disposed on the filling layer 24, and the transparent substrates 21B and 27B in the second electrode layer 27 are disposed on a surface of the conductive layer away from the filling layer 24.

The first alignment layer 25 is located between the first electrode layer 21 and the first and second liquid crystal layers 22 and 23, and is provided on one surface of the conductive films 21A and 27A of the first electrode layer 21 facing the first and second liquid crystal layers 22 and 23. The second alignment layer 26 is disposed between the filling layer 24 and the first and second liquid crystal layers 22 and 23, and covers a surface of the first and second liquid crystal layers 22 and 23 facing the filling layer 24. The first alignment layer 25 and the second alignment layer 26 are used to control the direction of deflection in the first liquid crystal layer 22 and the second liquid crystal layer 23.

In the optical film layer 20, when the first electrode layer 21 and the second electrode layer 27 are energized, an electric field is generated, and the electric field causes liquid crystal molecules 30 in the first liquid crystal layer 22 and the second liquid crystal layer 23 to deflect, so that light emitted by the display panel 10 is scattered, the visual angle of the display panel 10 is further increased, and the display device 1 can be viewed from different angles.

In the embodiment of the present invention, the liquid crystal molecules 30 in the first liquid crystal layer 22 and the second liquid crystal layer 23 can be deflected in batches according to the magnitude of the driving voltages of the first electrode layer 21 and the second electrode layer 27, so as to switch between a plurality of large viewing angle modes, thereby enabling the display device 1 to adapt to different use scenes.

Specifically, when the first electrode layer 21 and the second electrode layer 27 have no voltage, as shown in fig. 2, the long axes of the rod-shaped liquid crystal molecules 30 in the first liquid crystal layer 22 and the second liquid crystal layer 23 are parallel to the surface of the first electrode layer 21 close to the first alignment layer 25, the optical film layer 20 does not produce a viewing angle modulation effect on the display panel 10, and the brightness and the contrast of the front viewing angle of the display panel 10 are not reduced, so that the display device 1 is suitable for a single person to use at the front viewing angle.

When the driving voltage between the first electrode layer 21 and the second electrode layer 27 is 2 to 8 v, as shown in fig. 3, the first liquid crystal layer 22 has a relatively large thickness and a relatively weak surface anchoring energy, so that the filled rod-shaped liquid crystal molecules 30 are deflected by the electric field, and the long axes of the liquid crystal molecules 30 are perpendicular to the surface of the first electrode layer 21 close to the first alignment layer 25. The second liquid crystal layer 23 has a small thickness and a strong surface anchoring energy, so that the filled rod-shaped liquid crystal molecules 30 are not deflected by the electric field, and the long axes of the liquid crystal molecules 30 are still parallel to the first electrode layer 21 and close to the first alignment layer 25. At this time, the liquid crystal molecules 30 in the first liquid crystal layer 22 have a light scattering effect and can excessively disperse the display light emitted from the display panel 10, while the liquid crystal molecules 30 in the second liquid crystal layer 23 have no light scattering effect and cannot disperse the display light. Therefore, only the first liquid crystal layer 22 generates the viewing angle modulation effect, but the second liquid crystal layer 23 does not generate the modulation effect, the brightness and the contrast at the front viewing angle of the display panel 10 are slightly reduced due to the viewing angle modulation effect generated by the first liquid crystal layer 22, but the viewing angle of the display panel 10 is slightly increased relative to the single-person use mode, and the display device 1 is suitable for 2-3 persons to use at multiple viewing angles.

When the driving voltage between the first electrode layer 21 and the second electrode layer 27 is 10 to 20 volts, as shown in fig. 4, the rod-shaped liquid crystal molecules 30 filled in the first liquid crystal layer 22 and the second liquid crystal layer 23 are deflected by the electric field, so the long axes of the liquid crystal molecules 30 in the first liquid crystal layer 22 and the second liquid crystal layer 23 are perpendicular to the surface of the first electrode layer 21 close to the first alignment layer 25. At this time, the liquid crystal molecules 30 in the first liquid crystal layer 22 and the second liquid crystal layer 23 have a light scattering effect, and can scatter the display light emitted from the display panel 10. Therefore, both the first liquid crystal layer 22 and the second liquid crystal layer 23 can generate a viewing angle modulation effect, and the brightness and the contrast at the front viewing angle of the display panel 10 are greatly reduced due to the viewing angle modulation effect generated by both the first liquid crystal layer 22 and the second liquid crystal layer 23, but the viewing angle of the display panel 10 is large relative to the viewing angle when the driving voltage of the first electrode layer 21 and the second electrode layer 27 is 0 volt or 2-8 volts, and the viewing angle diffusion effect is the best, and the display device 1 at this time is suitable for more than 3 people to use at multiple viewing angles.

According to the optical film layer 20 and the display device 1 provided by the embodiment of the invention, the optical film layer 20 realizes sectional control of liquid crystal molecule deflection by designing two liquid crystal layers with different thicknesses, so that the optical film layer 20 can realize different visual angle modulation effects, the display device 1 has at least three use modes suitable for different scenes, and the visual angle size of the display device 1 can be switched according to different number of users. Meanwhile, the optical film layer in the embodiment of the invention can eliminate interference fringes of wide viewing angle film in the prior art and improve the quality of display picture.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.