CN111812881A

CN111812881A - Polaroid, display panel and electronic equipment

Info

Publication number: CN111812881A
Application number: CN202010624925.9A
Authority: CN
Inventors: 海博
Original assignee: Huizhou China Star Optoelectronics Technology Co Ltd
Current assignee: Huizhou China Star Optoelectronics Technology Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2020-10-23

Abstract

The invention provides a polarizer, a display panel and an electronic device, wherein the polarizer comprises: a support layer; the polarizing layer is arranged on the first side of the supporting layer; and the three-quarter lambda plate is arranged on the first side of the polarizing layer, wherein the first side is the side close to the display panel. The polaroid, the display panel and the electronic equipment can improve the contrast.

Description

Polaroid, display panel and electronic equipment

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of display, in particular to a polarizer, a display panel and electronic equipment.

[ background of the invention ]

The display panel of va (vertical alignment) display mode adopts normally black mode, i.e., the upper and lower polarizers are vertically offset (absorption axis is vertical) without applying voltage. Therefore, the brightness is low in the dark state, high contrast can be achieved, and the pixel is in the dark state when damaged and is represented as a dark point, so that the influence on the picture display is small.

The polarizing plate produced by the existing polarizing plate manufacturing equipment is provided in a roll shape, and needs to be cut into a proper size according to the size of a panel screen when in use. The width of the polarizer coiled material produced at present is limited, and when the width of the panel screen exceeds that of the polarizer coiled material, the polarizer coiled material cannot be cut into polarizers with the same size and vertical absorption axes, so that the large-size liquid crystal panel exceeding the width of the polarizer cannot normally realize a normally black mode according to the existing framework, and the contrast of the display panel is reduced.

[ summary of the invention ]

The invention aims to provide a polarizer, a display panel and an electronic device, which can improve the contrast of the display panel.

In order to solve the above technical problem, the present invention provides a polarizer, including:

a support layer;

the polarizing layer is arranged on the first side of the supporting layer;

and the three-quarter lambda plate is arranged on the first side of the polarizing layer, wherein the first side is the side close to the display panel.

The invention provides a display module, comprising:

a first polarizer;

a second polarizer;

the display panel is arranged between the first polaroid and the second polaroid, and both the first polaroid and the second polaroid are the polaroids;

wherein the absorption axis of the first polarizer is parallel to the absorption axis of the second polarizer.

The invention also provides electronic equipment which comprises the display module.

The invention relates to a polaroid, a display panel and electronic equipment, which comprise a supporting layer; the polarizing layer is arranged on the first side of the supporting layer; the three-quarter lambda plate is arranged on the first side of the polarizing layer, wherein the first side is the side close to the display panel; because the three-quarter lambda wave plate is added into the polaroid, the situation that the screen of the panel exceeds the width of the polaroid coiled material and a normally black mode cannot be realized can be avoided, and the contrast of the display panel is improved.

[ description of the drawings ]

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a conventional display panel in a normally white mode.

Fig. 2 is a schematic structural diagram of a conventional display panel in a normally black mode.

Fig. 3 is a schematic structural diagram of a conventional display module.

Fig. 4 is a schematic structural diagram of a display module according to an embodiment of the invention.

Fig. 5 is a schematic structural diagram of a display module according to another embodiment of the invention.

Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the invention.

[ detailed description ] embodiments

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.

As shown in fig. 1 and 2, since the incident light 11 is not deflected by the liquid crystal of VA mode when no voltage is applied, the normally black mode or the normally white mode is determined by the vertical offset (absorption axis is vertical) or the parallel offset (absorption axis direction is parallel to the direction indicated by arrow 101) of the upper and lower polarizers when no voltage is applied. As shown in fig. 1, when the lower polarizer 12 and the upper polarizer 13 are offset in parallel (the absorption axes are parallel), the display panel is in a normally white mode: as shown in fig. 2, when the lower polarizer 12 and the upper polarizer 13 are vertically attached (the absorption axis is vertical), the display panel is in a normally black mode.

As shown in fig. 3, the conventional display module includes a display panel 20, an upper polarizer 13 and a lower polarizer 12, wherein the lower polarizer 12 includes a supporting layer 121, a polarizing layer 122, a compensation film 123 and an adhesive layer 124; the upper polarizer 13 also includes a support layer 131, a polarizing layer 132, a compensation film 133, and an adhesive layer 134. Wherein the upper polarizer 13 is located at the light emitting side, and the lower polarizer 12 is located at the light incident side. Wherein the slow axes of the compensation films of the upper and lower polarizers 12 are perpendicular to the absorption axis of the polarizing layer. In one embodiment, the slow axis of the compensation film is 0 degrees and the absorption axis of the polarizing layer is 90 degrees. In the normally black mode, the absorption axes of the lower polarizer 12 and the upper polarizer 13 are perpendicular, that is, the direction of the absorption axis of the lower polarizer 12 is parallel to the direction indicated by the arrow 101, and the direction of the absorption axis of the upper polarizer 13 is perpendicular to the direction indicated by the arrow 101; therefore, the polarizer cannot be cut into the same size.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a display module according to an embodiment of the invention.

As shown in fig. 4, the display module 100 of the present embodiment includes a first polarizer 30', a second polarizer 30 and a display panel 20;

the absorption axis of the first polarizer 30' and the absorption axis of the second polarizer 30 are parallel.

In one embodiment, the first polarizer 30' is an upper polarizer, and the second polarizer 30 is a lower polarizer; or, the first polarizer 30' is a lower polarizer, and the second polarizer 30 is an upper polarizer; the upper polarizer is located on the light emitting side of the display panel 20, and the lower polarizer is located on the light incident side of the display panel 20.

The display panel 20 is disposed between the first polarizer 30' and the second polarizer 30. The display panel 20 may be a liquid crystal display panel, and includes an array substrate, a color filter substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate.

The structure of the polarizer is specifically described below:

the first polarizing plate 30' and the second polarizing plate 30 each include: a support layer 31, a polarizing layer 32, a three-quarter lambda plate 33 and an adhesive layer 34.

The material of the supporting layer 31 may be TAC/PET/PMMA, which is used to protect the polarizing layer, has the function of isolating water vapor, and can support the whole polarizer.

The polarizing layer 32 is arranged on a first side of the supporting layer 31; wherein the first side is a side close to the display panel. In one embodiment, in order to further improve the contrast ratio, the angle of the absorption axis of the polarizing layer 32 is 0 degree or 90 degrees.

A three-quarter lambda plate 33 is provided on a first side of the polarizing layer 32. Preferably, in order to further improve the contrast, the optical axis of the three-quarter λ -plate 33 has an angular range of one of 44 degrees to 46 degrees and 134 degrees to 136 degrees. To further improve the contrast, the thickness of the three-quarter lambda plate 33 ranges from 30 μm to 40 μm.

The Adhesive layer 34 includes, but is not limited to, Pressure Sensitive Adhesive (PSA), polypropylene Adhesive, and the like, and the Adhesive layer 34 is used for attaching the polarizer to the display panel. In other embodiments, the polarizer may not include the adhesive layer 34, and the display panel is attached to the first polarizer 30' and the second polarizer 30 through glue.

In one embodiment, in order to further improve the contrast ratio, the angle of the optical axis of the three-quarter λ -plate 33 in the first polarizer 30' is equal to the angle of the optical axis of the three-quarter λ -plate 33 in the second polarizer 30.

Wherein the angle of the absorption axis of the polarizing layer 32 in the first polarizer 30' is equal to the angle of the absorption axis of the polarizing layer 32 in the second polarizer 30, that is, the angles of the absorption axes of the polarizing layers 32 of the upper and lower polarizers are equal.

Since the three-quarter lambda plate is added to both the upper and lower polarizers of this embodiment, the incident light is converted into linearly polarized light perpendicular to the absorption axis of the lower polarizer through the lower polarizer. After passing through the three-quarter lambda plate on the inner side of the lower polarizer, incident light is changed into circularly polarized light, and after passing through the three-quarter lambda plate on the inner side of the upper polarizer, the circularly polarized light is changed into linearly polarized light, the polarization direction of the linearly polarized light is parallel to the absorption axis of the upper polarizer, and finally when the linearly polarized light passes through the upper polarizer, the incident light is parallel to the absorption axis of the upper polarizer, light is absorbed, and finally, the panel is in a normally black mode when no voltage is applied; the normally black mode can be realized by adopting parallel offset sticking of the upper and lower polaroids, so that the condition that the screen of the panel exceeds the width of the polaroid coiled material and the normally black mode cannot be realized is avoided, and the contrast of the display panel is further improved.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a display module according to another embodiment of the invention.

As shown in fig. 5, the display module 100 of the present embodiment is different from the previous display module in that: the polarizer of the present embodiment has a structure different from that of the polarizer of the previous embodiment. The polarizer of this embodiment further includes a compensation film 35, the compensation film 35 is disposed between the polarizing layer 32 and the three-quarter λ -plate 33, and a slow axis of the compensation film 35 is perpendicular to an absorption axis of the polarizing layer 32.

For example, in one embodiment, the angle of the absorption axis of the polarizing layer 32 is 0 degree or 90 degrees, and the slow axis of the compensation film 35 is 90 degrees or 0 degrees.

Preferably, in order to further improve the contrast ratio, the angle of the slow axis of the compensation film in the first polarizer 30' is equal to the angle of the slow axis of the compensation film in the second polarizer 30, that is, the angles of the slow axes of the compensation films of the upper and lower polarizers are equal.

With reference to fig. 4 and fig. 5, the embodiment of the present invention further provides a polarizer 30 or 30 ', that is, the polarizer of the present embodiment may be used as the first polarizer 30 and the second polarizer 30', and the polarizer of the present embodiment includes: a support layer 31, a polarizing layer 32, a three-quarter lambda plate 33 and an adhesive layer 34.

The Adhesive layer 34 includes, but is not limited to, Pressure Sensitive Adhesive (PSA), polypropylene Adhesive, and the like, and the Adhesive layer 34 is used for attaching the polarizer to the display panel. In other embodiments, the polarizer may not include the adhesive layer 34, and the display panel is attached to the first polarizer 30 and the second polarizer 30' through glue.

Wherein the angle of the optical axis of the three-quarter lambda plate 33 in the first polarizer 30' and the angle of the optical axis of the three-quarter lambda plate 33 in the second polarizer 30 are equal.

In another embodiment, the polarizer further comprises a compensation film 35, the compensation film 35 is disposed between the polarizing layer 32 and the three-quarter λ plate 33, and a slow axis of the compensation film 35 is perpendicular to an absorption axis of the polarizing layer 32.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 200 may include a display module 100, a control circuit 60, and a housing 50. It should be noted that the electronic device 200 shown in fig. 6 is not limited to the above, and may further include other devices, such as a camera, an antenna structure, a thread unlocking module, and the like.

The display module 100 is disposed on the housing 50.

In some embodiments, the display module 100 may be fixed to the housing 50, and the display module 100 and the housing 50 form a closed space to accommodate the control circuit 60 and other devices.

In some embodiments, the housing 50 may be made of a flexible material, such as a plastic housing or a silicone housing.

The control circuit 60 is installed in the housing 50, the control circuit 60 may be a motherboard of the electronic device 200, and one, two or more functional components of a battery, an antenna structure, a microphone, a speaker, an earphone interface, a universal serial bus interface, a camera, a distance sensor, an ambient light sensor, a receiver, a processor, and the like may be integrated on the control circuit 60.

The display module 100 is mounted in the housing 50, and the display module 100 is electrically connected to the control circuit 60 to form a display surface of the electronic device 200. The display module 100 may include a display area and a non-display area. The display area may be used to display a screen of the electronic device 200 or provide a user with touch control. The non-display area may be used to set various functional components.

The electronic device includes, but is not limited to, a mobile phone, a tablet computer, a computer monitor, a game machine, a television, a display screen, a wearable device, and other life appliances or household appliances with display functions.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. A polarizer, comprising

A support layer;

the polarizing layer is arranged on the first side of the supporting layer;

2. The polarizer of claim 1, wherein the optical axis of the three-quarter λ -plate has an angular range of one of 44 degrees to 46 degrees and 134 degrees to 136 degrees.

3. The polarizer of claim 1, further comprising:

and the compensation film is arranged between the polarizing layer and the three-quarter lambda plate, and the slow axis of the compensation film is vertical to the absorption axis of the polarizing layer.

4. The polarizer of claim 3,

the angle of the absorption axis of the polarizing layer is 0 degree or 90 degrees.

5. The polarizer of claim 1, further comprising an adhesive layer disposed on a first side of the three-quarter λ -plate.

6. The polarizer of claim 1,

the material of the polarizing layer is polyvinyl alcohol.

7. A display module, comprising:

a first polarizer;

a second polarizer;

a display panel arranged between the first polarizer and the second polarizer, wherein the first polarizer and the second polarizer are both the polarizer of any one of claims 1 to 6;

8. The display module of claim 7, wherein the angle of the optical axis of the three-quarter λ -plate in the first polarizer is equal to the angle of the optical axis of the three-quarter λ -plate in the second polarizer.

9. The display module according to claim 7, wherein the angle of the absorption axis of the polarizing layer in the first polarizer is equal to the angle of the absorption axis of the polarizing layer in the second polarizer; and/or the angle of the slow axis of the compensation film in the first polarizer is equal to the angle of the slow axis of the compensation film in the second polarizer.

10. An electronic device, comprising the display module according to any one of claims 7 to 9.