CN113690385A

CN113690385A - Display panel

Info

Publication number: CN113690385A
Application number: CN202110916810.1A
Authority: CN
Inventors: 胡凯; 苏博宇
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2021-11-23
Anticipated expiration: 2041-08-11
Also published as: CN113690385B

Abstract

The application provides a display panel, including: a panel main body; the color film layer is arranged on one side of the panel main body; the cover plate is arranged on one side of the color film layer; and the light-transmitting blocking layer is arranged between the color film layer and the cover plate and is used for separating the cover plate from the color film layer. The light-transmitting barrier layer prevents the G metal complex pigment from generating coordination reaction with the silicate material in the cover plate under the irradiation of sunlight, so that the transmittance of the color film layer in purple light can be prevented from being reduced, and the brightness of the display panel under the irradiation of the sunlight cannot be influenced.

Description

Display panel

Technical Field

The application relates to the technical field of flexible display, in particular to a display panel.

Background

The flexible display panel has the advantages of wide visual angle, ultrahigh contrast, quick response and the like, but has higher power consumption and serious heating under a high-brightness picture. The main reason for high power consumption of the flexible display panel in a high brightness picture is the low transmittance of the Polarizer (POL). The problem can be solved by adopting a depolarizer (POL Less) technology, namely, the depolarizer is removed, and the transmittance is improved. However, after removing the polarizer, it was found that the luminance of the display panel was decreased under the irradiation of sunlight.

Therefore, the prior art has defects which need to be solved urgently.

Disclosure of Invention

The application provides a display panel, which can solve the technical problem that the brightness of a display device is reduced under the irradiation of sunlight.

In order to solve the above problems, the technical solution provided by the present application is as follows:

a display panel, comprising:

a panel main body;

the color film layer is arranged on one side of the panel main body and comprises a plurality of color resistance units, and the color resistance units at least comprise green color resistances;

the cover plate is arranged on one side of the color film layer, which is far away from the panel main body; and

the printing opacity barrier layer set up in color film layer with between the apron, the printing opacity barrier layer covers at least green colour hinders.

In some embodiments, the color resistance units further include a red color resistance and a blue color resistance, and the transparent blocking layer further covers the red color resistance and the blue color resistance.

In some embodiments, the light-transmitting barrier layer is a polymer film.

In some embodiments, the light-transmitting barrier layer is a single film layer formed by any one of polyimide, polysiloxane, polytetrafluoroethylene, polyethylene, and tetrafluoroethylene copolymer.

In some of the embodiments, the light-transmitting barrier layer is a multi-layer composite film formed by laminating at least two single-layer films.

In some embodiments, the green color resist is covered by a multilayer composite film, and the red color resist and the blue color resist are respectively covered by a single layer film.

In some embodiments, the color film layer does not include a black matrix, and two opposite ends of the green color resistor are partially covered by the red color resistor or the blue color resistor, respectively.

In some of these embodiments, the color film layer includes a black matrix layer, and opposite ends of the green color resistor are covered by the black matrix layer.

In some embodiments, the panel body includes an array substrate, a light emitting layer and a pixel defining layer, the pixel defining layer is disposed on a surface of the array substrate, the pixel defining layer includes a plurality of openings, the light emitting layer includes a plurality of light emitting units, and the light emitting units are formed in the openings.

In some embodiments, the liquid crystal display panel further includes an optical adhesive layer and a flat layer located on the surface of the color film layer, the cover plate is disposed on the flat layer through the optical adhesive layer, and the light-transmitting barrier layer is located between the optical adhesive layer and the flat layer.

The beneficial effect of this application does: the application provides a display panel be provided with the printing opacity barrier layer between various rete and the apron, the printing opacity barrier layer can make the green colour of various rete hinder the G metal complex pigment that includes and optics adhesive layer and the silicate material in the apron break away from the contact to prevent that the coordination reaction takes place for the silicate material in G metal complex pigment and the apron, thereby can prevent that various rete from descending at the transmissivity of purple light, thereby display panel's luminance can not receive the influence under the illumination of sunlight.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a display panel according to a second embodiment of the present application;

fig. 3 is a schematic structural diagram of a display panel according to a third embodiment of the present application;

fig. 4 is a schematic structural diagram of a display panel according to a fourth embodiment of the present application.

Description of the reference numerals

1-basal layer, 2-panel body, 3-pixel definition layer, and 20-array substrate

4-luminous layer, 5-packaging layer and 6-touch functional layer

7-color film layer, 8-flat layer, 9-light-transmitting barrier layer and 10-optical adhesive layer

11-cover plate, 71-first color resistance unit, 72-second color resistance unit, 73-third color resistance unit

40-light emitting unit, 41-first light emitting unit, 42-second light emitting unit

43-third light emitting unit, 60-touch pattern, 74-black matrix

91. 92, 93-monolayer films

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 "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered 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.

The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

The display panel of the present application is described in detail with reference to specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel 100 according to a first embodiment of the present application. The display panel 100 includes: a panel main body 2; the color film layer 7 is arranged on one side of the panel main body 2; the cover plate 11 is arranged on one side of the color film layer 7; and a light-transmitting barrier layer 9 arranged between the color film layer 7 and the cover plate 11 and used for separating the cover plate 11 from the color film layer 7.

The application provides a display panel 100 be provided with printing opacity barrier layer 9 between various rete 7 and the apron 11, so can make the green colour of various rete 7 hinder the G metal complex pigment that includes and the silicate material in the apron 11 breaks away from the contact, thereby under the illumination of sunlight, can prevent that the coordination reaction takes place for the G metal complex pigment and the silicate material in optics adhesive layer 10 and the apron 11, thereby can prevent that various rete 7 from declining at the transmissivity of purple light, thereby display panel 100's luminance can not receive the influence under the illumination of sunlight.

The display panel 100 of the present solution is preferably a flexible OLED display panel. The present embodiment is illustrated by taking a flexible OLED display panel as an example.

In this embodiment, the panel main body 2 at least includes an array substrate 20, a light emitting layer 4, a pixel defining layer 3 and a touch control function layer 6, the pixel defining layer 3 is located on the surface of the array substrate 20, the pixel defining layer includes a plurality of openings, the light emitting layer 4 includes a plurality of light emitting units 40, and the light emitting units 40 are formed in the openings.

Specifically, the display panel 100 sequentially includes, along the light emitting direction: the liquid crystal display panel comprises a base layer 1, an array substrate 20, a pixel definition layer 3, a light emitting layer 4, an encapsulation layer 5, a touch control functional layer 6, a color film layer 7, a flat layer 8, a light transmitting blocking layer 9, an optical adhesive layer 10 and a cover plate 11.

The base layer 1 is a base of the array substrate 20 and is used for protecting the array substrate 20. The material of the base layer 1 may be polyimide.

The substrate of the array substrate 20 is made of one of the following materials: transparent materials such as poly terephthalic acid plastic, polycarbonate PC, polymethyl methacrylate PMMA, glass and the like.

The pixel definition layer 3 can be made of a transparent material or a non-transparent material, and if the pixel definition layer 3 is made of the non-transparent material, the pixel definition layer 3 can be multiplexed into a black matrix, so that the black matrix does not need to be made on the display substrate through a special composition process, and the structure and the making process of the display substrate can be simplified. In this embodiment, the pixel defining layer 3 is made of a light-proof material.

The light emitting layer 4 is formed on the array substrate 20 by a plating process. In this embodiment, the first light emitting unit 41, the second light emitting unit and the third light emitting unit are designed in the light emitting layer 4. The first light emitting unit 41, the second light emitting unit 42, and the third light emitting unit 43 are one or more of red, green, and blue to satisfy the requirement of the display satisfying the design. In this embodiment, a pixel definition layer 3 is formed on a panel main body 2, a groove is formed on the pixel definition layer 3 by photolithography, and a pixel material is filled in the groove to form the light emitting layer 4.

The encapsulation layer 5 is located on the surface of the light-emitting layer 4. In this embodiment, after the light-emitting layer 4 is formed, the light-emitting layer 4 is encapsulated by a thin film encapsulation technique TFE. In one embodiment, the electroluminescent layer 4 may be encapsulated with an inorganic material or an organic material alone to form a thin film encapsulation layer 5 on the surface of the electroluminescent layer 4. In another embodiment, the light-emitting layer 4 may be encapsulated in such a manner that inorganic material layers and organic material layers are crossed.

The touch functional layer 6 is located on the surface of the packaging layer 5. The touch function layer 6 includes a plurality of touch patterns 60, and the touch function layer 6 may be formed as such. Specifically, firstly, depositing a metal layer on the encapsulation layer 5, coating a photoresist on the metal layer, and exposing the photoresist by using a mask plate to form a photoresist unreserved region and a photoresist reserved region, wherein the photoresist reserved region corresponds to the region where the touch pattern 60 is located, and the photoresist unreserved region corresponds to a region other than the pattern; developing, completely removing the photoresist in the photoresist unreserved region, and keeping the thickness of the photoresist in the photoresist reserved region unchanged; and completely etching away the metal layer in the region where the photoresist is not reserved by an etching process, and stripping the residual photoresist to form the touch control pattern 60. Of course, the touch pattern 60 may include a plurality of layers, and the touch pattern 60 of each layer may be formed in the above manner. Or a package On-cell Touch (DOT) technology may be adopted to form a Touch metal layer On the package layer 5, where the Touch metal layer may be a self-contained single-layer metal layer or a mutual-contained single-layer metal layer.

In this scheme, the color film layer 7 is located on the surface of the touch functional layer 6. The color film layer 7 includes a plurality of color-resisting units and a black matrix 74 formed between adjacent color-resisting units. The color resistance units include a first color resistance unit 71, a second color resistance unit 72, and a third color resistance unit 73. The first color resistance unit 71, the second color resistance unit 72 and the third color resistance unit 73 are respectively one of a red color resistance, a green color resistance and a blue color resistance. More preferably, opposite ends of the green color resistor are covered by the black matrix layer. Therefore, the distance between the green color resistor and the cover plate is increased, and the possibility that the silicate material contained in the cover plate and the metal complex pigment existing in the green color resistor G material of the color film layer react under the irradiation of sunlight and the action of moisture is further reduced.

In this embodiment, the projection of the color-resisting unit 70 corresponding to each light-emitting unit 40 on the panel body 2 is larger than the projection of the light-emitting unit 40 opposite to the color-resisting unit on the panel body 2, so that light leakage can be prevented.

In the scheme, the Color film layer 7(Color Filter, CF) is used for replacing a polarizer (POL-less technology), so that the thickness of the functional layer can be reduced from 100 mu m to 5 mu m, and the light extraction rate can be improved from 42% to 60%. Moreover, the color film layer 7 only comprises three colors, a black matrix is not needed, and the manufacturing process can be simplified.

The flat layer 8 is located on the surface of the color film layer 7. The material of the planarization layer 8 may be an insulating material, and the material of the planarization layer 8 may include one or more of SiO2, SiNx, and Al2O 3. The planarization layer 8 can also be made of OC (over coat) material, but is not limited thereto.

The light-transmitting barrier layer 9 is formed on the surface of the planarization layer 8. The light-transmitting barrier layer 9 is a polymer film formed of a polymer material. The light-transmitting barrier layer 9 may be a single film layer formed of any one of polyimide, polysiloxane, polytetrafluoroethylene, polyethylene, and tetrafluoroethylene copolymer. The light-transmitting barrier layer 9 can prevent moisture from contacting the color film layer 7, has flexibility, and can be bent.

The light transmission blocking layer 9 can make the G metal complex pigment that the green color of the color film layer 7 includes break away from the contact with the silicate material in the optical adhesive layer 10 and the cover plate 11, even if there is light irradiation, because of the existence of the light transmission blocking layer 9, it can prevent the G metal complex pigment that the green color of the color film layer 7 includes from taking place coordination reaction with the silicate material in the optical adhesive layer 10 and the cover plate 11, thereby can prevent the color film layer 7 from reducing in the transmittance of violet light, thereby the luminance of the display panel 100 can not be influenced under the irradiation of sunlight.

The apron 11 passes through optics adhesive layer 10 set up in on the planarization layer 8, the printing opacity barrier layer 9 is located optics adhesive layer 10 with between the planarization layer 8. The cover plate 11 plays a role in isolating water and oxygen, and prevents water vapor and oxygen in the environment from corroding the display panel 100, so that the service life of the display panel 100 is prolonged.

Referring to fig. 2, fig. 2 is a display panel 200 according to a second embodiment of the present disclosure, the structure of the display panel 200 according to the second embodiment is substantially the same as that of the display panel 100 according to the first embodiment, and the difference therebetween is: in this scheme, the color film layer 7 does not include a black matrix layer, and two opposite ends of the green color resistor are respectively covered by a red color resistor or a blue color resistor.

In this embodiment, the first color resistance unit 71 may be formed on the surface of the package layer 5, the second color resistance unit 72 may be formed on the surface of the package layer 5, a gap may be formed between the first color resistance unit 71 and the second color resistance unit 72, and the third color resistance unit 73 may be formed in the gap. At least one of the first color resistance unit 71 and the second color resistance unit 72 is a green color resistance. The cross-sectional shape of the third color resist unit 73 is a T-shape. That is, the third color resist unit 73 includes a vertical portion 730 and a horizontal portion 732 connected to the vertical portion 730, two ends of the horizontal portion 732 respectively cover the first color resist unit 71 and the second color resist unit 72 adjacent thereto, and the covered positions are light blocking portions and can increase the distance between the green color resist and the cover plate.

Referring to fig. 3, fig. 3 is a display panel 300 according to a third embodiment of the present application, the structure of the display panel 300 according to the third embodiment is substantially the same as that of the display panel 200 according to the second embodiment, and the difference therebetween is: the light-transmitting barrier layer 9 is a multilayer composite film formed by laminating at least two single-layer films 91, 92 and 93 made of different materials. In this embodiment, a multilayer composite film is illustrated, which is prepared by performing multilayer coextrusion on single film layers respectively formed by three different materials through high polymer processing equipment, and has better water resistance. Of course, in other embodiments, the light-transmitting barrier layer 9 may also be formed by co-extrusion of single-layer films 91, 92, 93 of the same material.

Referring to fig. 4, fig. 4 is a display panel 400 according to a fourth embodiment of the present disclosure, the structure of the display panel 400 according to the fourth embodiment is substantially the same as that of the display panel 200 according to the second embodiment, but the difference is: the second color resistance unit 72 is defined as a green color resistance, the green color resistance is isolated from the cover plate 11 by the transparent barrier layer 9 formed by the multilayer composite film, and the red color resistance and the blue color resistance are isolated by the single layer film 92 respectively.

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

Claims

1. A display panel, comprising:

a panel main body;

the printing opacity barrier layer set up in color film layer with between the apron, the printing opacity barrier layer at least be used for isolated apron with green look hinders.

2. The display panel of claim 1, wherein the color-resisting units further comprise a red color-resisting layer and a blue color-resisting layer, and the transparent blocking layer is further used for isolating the cover plate from the red color-resisting layer and the blue color-resisting layer.

3. The display panel of claim 2, wherein the light-transmissive barrier layer is a polymer film.

4. The display panel according to claim 3, wherein the light-transmitting barrier layer is a single film layer formed of any one of polyimide, polysiloxane, polytetrafluoroethylene, polyethylene, and tetrafluoroethylene copolymer.

5. The display panel according to claim 4, wherein the light-transmitting barrier layer is a multi-layer composite film formed by laminating at least two single-film layers.

6. The display panel according to claim 5, wherein the green color resists are isolated from the cover plate by a multi-layer composite film, and the red color resists and the blue color resists are isolated from the cover plate by single-layer films respectively.

7. The display panel according to any one of claims 1 to 6, wherein the color film layer does not include a black matrix layer, and opposite ends of the green color resistor are partially covered by a red color resistor or a blue color resistor, respectively.

8. The display panel according to any one of claims 1 to 6, wherein the color film layer comprises a black matrix layer, and opposite ends of the green color resistor are covered by the black matrix layer.

9. The display panel according to claim 1, wherein the panel body comprises an array substrate, a light emitting layer and a pixel defining layer, the pixel defining layer is disposed on a surface of the array substrate, the pixel defining layer comprises a plurality of openings, the light emitting layer comprises a plurality of light emitting units, and the light emitting units are formed in the openings.

10. The display panel according to claim 1, further comprising an optical adhesive layer and a flat layer located on the surface of the color film layer, wherein the cover plate is disposed on the flat layer through the optical adhesive layer, and the light-transmitting barrier layer is located between the optical adhesive layer and the flat layer.