CN114122082B

CN114122082B - Display panel and display device

Info

Publication number: CN114122082B
Application number: CN202111314047.1A
Authority: CN
Inventors: 杨培学
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2023-07-25
Anticipated expiration: 2041-11-08
Also published as: CN114122082A

Abstract

The invention provides a display panel and a display device. The display panel includes a light emitting layer, a packaging layer, and a refraction unit. The light-emitting layer is provided with a plurality of light-emitting areas and non-light-emitting areas surrounding the light-emitting areas. The packaging layer is arranged on the light-emitting layer. The refraction unit is arranged in the packaging layer and corresponds to the non-light-emitting area of the light-emitting layer. The refraction unit emits deviated light from a direction perpendicular to the light emitting layer by changing the angle of the light obliquely emitted into the non-light emitting area, thereby improving the color cast problem of the display panel.

Description

Display panel and display device

Technical Field

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

Background

An OLED (Organic Light-Emitting Diode) is a self-luminous Organic display device, which is formed by injecting and recombining carriers, then making electrons in an excited state extremely unstable, and making the electrons transition to a ground state, and releasing energy in the form of Light during the transition, so as to emit Light of different colors.

The existing display panel is composed of a substrate, a light-emitting layer and a packaging layer, and the light of the display panel is formed by mixing sub-pixels with three primary colors of red, green and blue so as to achieve different colors. The light emitted by the sub-pixels is mixed with the light emitted by the adjacent sub-pixels in a staggered manner in the emitting process, so that the color of the display panel is colored, and the display effect is affected.

Disclosure of Invention

The invention aims to provide a display panel and a display device, which are used for solving the problem of color cast phenomenon caused by light staggered mixing of adjacent light emitting devices in the light emitting process in the prior art.

In order to achieve the above object, the present invention provides a display panel including a light emitting layer, an encapsulation layer, and a refraction unit. The light-emitting layer is provided with a plurality of light-emitting areas and non-light-emitting areas surrounding the light-emitting areas. The packaging layer is arranged on the light-emitting layer. The refraction unit is arranged in the packaging layer and corresponds to the non-light-emitting area of the light-emitting layer.

Further, the refraction unit is provided with at least one light scattering structure, and the light scattering structure is used for changing the emergent direction of the light.

Further, the light diffusing structure includes a first groove, and the first groove is disposed on a surface of the refraction unit facing the light emitting layer, and is an arc-shaped groove.

Further, the light diffusing structure includes a second groove, and the second groove is disposed on a surface of the refraction unit away from the light emitting layer, and is an arc-shaped groove.

Further, the encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer. The first inorganic layer is arranged on the light-emitting layer. The organic layer is arranged on the first inorganic layer. The second inorganic layer is arranged on the organic layer.

Further, the refraction unit is disposed in the organic layer.

Further, the light emitting layer includes a pixel defining layer and a light emitting device. And a plurality of openings are arranged in the pixel limiting layer, and the openings correspond to the light-emitting areas. The light emitting device is disposed in the opening.

Further, the light emitting device comprises a red light emitting device, a green light emitting device and a blue light emitting device, wherein the red light emitting device, the green light emitting device and the blue light emitting device are uniformly distributed in the light emitting layer, and the colors of light rays emitted by two adjacent light emitting devices are different.

Further, the display panel further comprises a substrate, and the substrate is arranged on a surface, far away from the packaging layer, of the light-emitting layer.

The invention also provides a display device comprising the display panel.

The invention has the advantages that: according to the display panel and the display device, the light emitting direction is changed through the refraction unit, the light obliquely emitted into the non-light-emitting area is emitted to the position right above the display panel, and the light is prevented from being mixed in the non-light-emitting area, so that the color cast problem of the display panel is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a layered structure of a display panel according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a light emitting layer according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a refractive unit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a layered structure of a display panel according to another embodiment of the invention;

fig. 5 is a schematic view of a layered structure of a display panel according to another embodiment of the invention.

The components in the figure are shown as follows:

a display panel 1; a substrate 10;

a light emitting layer 20; a light emitting region 20A;

a non-light emitting region 20B; a pixel defining layer 21;

an opening 22; a light emitting device 23;

an encapsulation layer 30; a first inorganic layer 31;

an organic layer 32; a second inorganic layer 33;

a refraction unit 40; a first groove 41;

a second recess 42.

Detailed Description

The following description of the preferred embodiments of the present invention, which will be described in sufficient detail to enable those skilled in the art to practice the invention, is provided with a further understanding of the invention, and is made clear to a person skilled in the art by reference to the accompanying drawings. The present invention may be embodied in many different forms of embodiments of the invention, the scope of which is not limited to only the embodiments described herein.

In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. The dimensions and thicknesses of each component shown in the drawings are arbitrarily shown, and the present invention is not limited to the dimensions and thicknesses of each component. The thickness of the components is exaggerated in some places in the drawings for clarity of illustration.

Furthermore, the following description of various inventive embodiments is provided with reference to the accompanying drawings, which illustrate specific inventive embodiments in which the invention may be practiced. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present invention are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present invention, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

When some element is described as being "on" another element, the element may be directly on the other element; there may also be an intermediate member that is placed on the intermediate member and the intermediate member is placed on another member. When an element is referred to as being "mounted to" or "connected to" another element, it can be directly "mounted to" or "connected to" the other element or be indirectly "mounted to" or "connected to" the other element via an intervening element.

In an embodiment of the present invention, a display device, which may be an OLED (organic light emitting diode) display device, includes a display panel 1, where the display panel 1 includes a substrate 10, a light emitting layer 20, and the like. The display device can be any display device with a display function, such as a mobile phone, a notebook computer, a tablet computer and the like.

As shown in fig. 1, the display panel 1 includes a substrate 10, a light emitting layer 20, an encapsulation layer 30, and a refraction unit 40.

The substrate 10 is an array substrate, and is provided with a plurality of thin film transistors, and the thin film transistors are used for controlling the on or off of the light emitting devices 23 in the light emitting layer 20.

The light emitting layer 20 is disposed on the substrate 10 and has a light emitting surface, and the light emitting surface is a surface of the light emitting layer 20 away from the substrate 10. The light-emitting layer 20 further has a plurality of light-emitting regions 20A and a non-light-emitting region 20B surrounding the light-emitting regions 20A, and light is emitted from the light-emitting regions 20A of the light-emitting layer 20, and devices in the non-light-emitting regions 20B cannot emit light.

As shown in fig. 1 and 2, the light emitting layer 20 includes a pixel defining layer 21 and a plurality of light emitting devices 23 therein. The pixel defining layer 21 is disposed on the substrate 10, corresponds to the non-light emitting region 20B, and is made of a light shielding material. A plurality of openings 22 are arranged in the pixel defining layer 21, and the openings 22 are located in the light emitting region 20A and penetrate through the pixel defining layer 21 to expose a part of the surface of the substrate 10. The light emitting device 23 is disposed in the opening 22 and electrically connected to the thin film transistor in the substrate 10, so as to convert the electrical energy transmitted by the thin film transistor into light energy, and emit light from the light emitting surface of the light emitting layer 20, thereby realizing light emitting display.

Specifically, the light emitting device 23 includes a red light emitting device, a green light emitting device, and a blue light emitting device for emitting red light, green light, and blue light, respectively. The light emitting devices 23 of different colors are uniformly distributed in the light emitting layer 20, and the light emitted between two adjacent light emitting devices 23 is different. The display panel 1 controls the light emission of each light emitting device 23 according to the display signal, and obtains more colors of light by mixing the light of the three primary colors of red, green and blue, thereby realizing color display.

As shown in fig. 1, the encapsulation layer 30 covers the light-emitting surface of the light-emitting layer 20, and is prepared by using a thin film encapsulation (Thin Film Encapsulation, TFE) technology. Specifically, the encapsulation layer 30 includes a first inorganic layer 31, an organic layer 32, and a second inorganic layer 33. The first inorganic layer 31 is disposed on a surface of the light emitting layer 20 away from the substrate 10, the organic layer 32 is disposed on a surface of the first inorganic layer 31 away from the light emitting layer 20, and the second inorganic layer 33 is disposed on a surface of the organic layer 32 away from the first inorganic layer 31. Wherein the first inorganic layer 31 and the second inorganic layer 33 are used for blocking water and oxygen, and the organic layer 32 is used for increasing flexibility of the encapsulation layer 30.

The refraction unit 40 is provided in the organic layer 32 and also corresponds to the pixel defining layer 21 in the light emitting layer 20. The refraction unit 40 is configured to change the light emitting angle, as shown by the arrow in fig. 1, change the angle of the light obliquely incident into the non-light emitting area 20B, and emit the light with the deviated emitting angle from the direction perpendicular to the light emitting surface, so as to avoid the light mixing in the non-light emitting area 20B, further solve the color shift problem of the display panel 1, improve the color saturation of the display screen, and improve the display effect.

Specifically, as shown in fig. 1 and 3, the refraction unit 40 has at least one light scattering structure including a first groove 41 and a second groove 42 opposite to each other. The first groove 41 and the second groove 42 are arc-shaped grooves, and the organic layer 32 fills the first groove 41 and the second groove 42. The first groove 41 is disposed on a surface of the refraction unit 40 facing the light emitting layer 20, and an arc groove bottom of the first groove faces the first inorganic layer 31. The second groove 42 is disposed on a surface of the refraction unit 40 away from the light emitting layer 20, and an arc groove bottom thereof faces the second inorganic layer 33. The first groove 41 and the second groove 42 enable the refraction unit 40 to form a biconcave lens structure, and may be a symmetrical biconcave lens structure or an asymmetrical biconcave lens structure, so that the concave lens has a light scattering function, and therefore, light collected in the non-light-emitting area 20B is scattered, light of different colors is prevented from being mixed, and color cast is improved.

According to the display panel provided by the embodiment of the invention, the refraction unit is arranged to change the emitting direction of the light, so that the light in the deviated direction is emitted to the position right above the display panel, and the light is prevented from being mixed in a non-luminous area, so that the color cast problem of the display panel is improved, the color saturation of a display picture is improved, and the display effect of the display device is further improved.

In other embodiments of the present invention, the refraction unit 40 may include only the first groove 41 or only the second groove 42, so that the refraction unit 40 forms a plano-concave lens unit with grooves on only one side as shown in fig. 4 and 5, and further provides a display panel and a display device including the plano-concave lens unit, which have a layered structure similar to that of the biconcave lens unit in the embodiments of the present invention, and therefore will not be described in detail herein. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

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 the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims

1. A display panel, comprising:

a light emitting layer having a number of light emitting regions and a non-light emitting region surrounding the light emitting regions;

the packaging layer is arranged on the light-emitting layer;

the refraction unit is arranged in the packaging layer and corresponds to the non-light-emitting area of the light-emitting layer;

the refraction unit is provided with at least one light scattering structure, the light scattering structure is used for enabling light rays with deviated emission angles to be emitted perpendicular to the direction of the display panel, the light scattering structure comprises a second groove arranged on one surface, far away from the light emitting layer, of the refraction unit, and the second groove is an arc-shaped groove.

2. The display panel of claim 1, wherein the light diffusing structure comprises:

the first groove is arranged on one surface of the refraction unit facing the light-emitting layer;

the first groove is an arc-shaped groove.

3. The display panel of claim 1, wherein the encapsulation layer comprises:

a first inorganic layer disposed on the light emitting layer;

an organic layer disposed on the first inorganic layer;

and the second inorganic layer is arranged on the organic layer.

4. The display panel of claim 3, wherein the refractive unit is disposed in the organic layer.

5. The display panel of claim 1, wherein the light emitting layer comprises:

a pixel defining layer provided with a number of openings, the openings being located in the light emitting region;

and a light emitting device disposed in the opening.

6. The display panel according to claim 5, wherein the light emitting device includes a red light emitting device, a green light emitting device, and a blue light emitting device, the red light emitting device, the green light emitting device, and the blue light emitting device are uniformly distributed in the light emitting layer, and colors of light emitted from adjacent two light emitting devices are different.

7. The display panel of claim 1, further comprising:

the substrate is arranged on one surface of the light-emitting layer, which is far away from the packaging layer.

8. A display device comprising a display panel as claimed in any one of claims 1-7.