CN213124489U

CN213124489U - Display panel and display device

Info

Publication number: CN213124489U
Application number: CN202022736985.8U
Authority: CN
Inventors: 王思琪
Original assignee: EverDisplay Optronics Shanghai Co Ltd
Current assignee: EverDisplay Optronics Shanghai Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-05-04
Anticipated expiration: 2030-11-23

Abstract

The application provides a display panel and a display device, wherein the display panel comprises a substrate; an organic light emitting layer on one side of the substrate, the organic light emitting layer including OLED pixels; the thin film packaging layer is positioned on one side of the organic light-emitting layer, which is far away from the substrate, and comprises a plurality of layers of organic thin films with light-transmitting parts and non-light-transmitting parts, wherein the non-light-transmitting parts are made of black opaque materials or filled with anti-reflection particles; the color filter layer is positioned on one side, away from the substrate, of the film packaging layer and comprises a color film arranged above the OLED pixels; the color film forms a first projection area based on the substrate, the OLED pixels form a second projection area based on the substrate, the non-light-transmitting part of the organic film in the film packaging layer forms a third projection area based on the substrate, an area in the first projection area, which is removed from the intersection area of the first projection area and the second projection area, forms a fourth projection area, and the third projection area covers the fourth projection area; the application reduces the reflectivity of the OLED device.

Description

Display panel and display device

Technical Field

The utility model relates to a show technical field, specifically speaking relates to a display panel and display device.

Background

Compared with a conventional LCD (Liquid Crystal Display) Display panel, an OLED (Organic Light-Emitting Diode) Display panel does not need a backlight source, can realize self-luminescence, has the advantages of simple structure, lightness, thinness, high brightness, good luminous efficiency, wide viewing angle, foldability and the like, and is widely applied to the fields of wearing, mobile phones, tablets, computers and the like.

The OLED device is composed of a thin organic material and a glass substrate, and the organic material is controlled to emit light by generating current through a driving circuit. The drive circuit of the OLED device is composed of various patterned metal wires, has strong reflection, and can influence the light emitting effect of the screen. In order to reduce the reflection of the OLED device in the prior art, a polarizer is generally attached. However, the polarizer has the disadvantages of poor transmittance and large power consumption, which can significantly increase the power consumption of the OLED device.

There is a prior art use of filters which can reduce the reflection of the OLED device and improve power consumption compared to the solution using polarizers. However, the color film in the filter has different opening sizes due to device precision, OLED pixel design or optical effect. When the opening size of the color film is larger than the size of the OLED pixels, the reflectivity of the metal wiring part in the driving circuit layer which is not covered by the black matrix is higher, so that the overall reflectivity of the OLED panel can be increased, the light emitting effect of the OLED panel is poor, and the display effect of the OLED panel is not facilitated.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a display panel and a display device to reduce the reflectivity of the OLED display device.

According to an aspect of the present invention, there is provided a display panel, including:

a substrate;

an organic light emitting layer on one side of the substrate, the organic light emitting layer including OLED pixels;

the thin film packaging layer is positioned on one side of the organic light-emitting layer, which is far away from the substrate, and comprises a plurality of layers of organic thin films with light-transmitting parts and non-light-transmitting parts, wherein the non-light-transmitting parts are made of black opaque materials or filled with anti-reflection particles; and

the color filter layer is positioned on one side, away from the substrate, of the film packaging layer and comprises a color film arranged above the OLED pixels; the color film forms a first projection area based on the substrate, the OLED pixels form a second projection area based on the substrate, a non-light-transmitting part of an organic film in the film packaging layer forms a third projection area based on the substrate, an area in the first projection area, where an intersection area of the first projection area and the second projection area is removed, forms a fourth projection area, and the fourth projection area is covered by the third projection area.

Optionally, the color filter layer further includes a black matrix disposed between adjacent color films, contact surfaces of the black matrix and the color films are inclined slope surfaces, and a first slope surface formed on an end surface of the black matrix is away from the color films as a distance between the black matrix and the substrate increases.

Optionally, the organic light emitting layer further includes a pixel defining layer for defining an area where the OLED pixel is located, and a surface of the pixel defining layer facing away from the substrate is coated with a black opaque material.

Optionally, the pixel defining layer coated with black opaque material forms a fifth projection area based on the substrate, and the fourth projection area coincides with the fifth projection area.

Optionally, the organic light emitting layer further includes a pixel defining layer for defining an area where the OLED pixel is located, contact surfaces of the pixel defining layer and the OLED pixel are both inclined slopes, a second slope formed by an end surface of the pixel defining layer is away from the OLED pixel with an increase in distance between the pixel defining layer and the substrate, and the first slope is parallel to the second slope.

Optionally, the organic light emitting layer further includes a pixel defining layer for defining an area where the OLED pixel is located, and the pixel defining layer is made of a black opaque material.

Optionally, a plane where the first slope surface is located passes through a central point of an end surface of the OLED pixel close to one side of the substrate, and an included angle formed between the first slope surface and the thickness direction of the display panel is in a range of 0 ° to 80 °.

Optionally, the display panel further includes an antireflection film located on a side of the film encapsulation layer facing away from the substrate.

Optionally, the display panel further includes a package cover plate, the package cover plate is located at a side where the color filter layer deviates from the substrate, and the anti-reflection film is located between the color filter layer and the package cover plate or located at a side where the package cover plate deviates from the substrate.

Optionally, the display panel further includes a driving circuit layer between the substrate and the organic light emitting layer.

According to another aspect of the present invention, there is provided a display device including the display panel of any one of the above.

Compared with the prior art, the utility model beneficial effect lie in:

the utility model provides a display panel and display device adopts black opaque material or the non-printing opacity portion that has the anti-reflection granule through the organic thin layer setting in the film packaging layer, walks the reverberation realization that the line part sees through out to the metal in the drive circuit layer and cover, is favorable to reducing OLED device reflectivity, promotes OLED display panel's display effect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of a display panel in the prior art;

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

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

fig. 4 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

fig. 7 is a schematic flowchart illustrating a manufacturing method of a display panel according to an embodiment of the present invention;

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

Fig. 1 is a schematic structural diagram of a display panel in the prior art. As shown in fig. 1, the display panel in the prior art includes a driving circuit layer 101, an organic light emitting layer, a thin film encapsulation layer 104, a color filter layer, and an encapsulation cover plate 107, which are stacked in sequence. The organic light emitting layer includes an OLED pixel 102 and a pixel defining layer 103 for defining an area where the OLED pixel 102 is located. The color filter layer includes a color film 105 disposed over the OLED pixels 102 and a black matrix 106 disposed between adjacent color films 105. The color film 105 corresponds to the OLED pixel 102, and the color film 105 is used for transmitting light emitted by the OLED pixel 102. Since the light transmittance of the black matrix 106 is almost zero, the light emitted from the OLED pixels 102 can only transmit through the color film 105.

When the opening size of the color film 105 is larger than the opening size of the OLED pixel 102 (the rounded rectangular frame shown in fig. 1 is a portion where the opening is larger), for example, a large viewing angle brightness attenuation angle may be increased, and at this time, that is, the occupation ratio of the color film 105 on the whole display panel is increased, which correspondingly causes a reduction in the occupation ratio of the black matrix 106 on the whole display panel, and since the reflectivity of the color film 105 is larger than that of the black matrix 106, the reflectivity of the metal routing portion in the driving circuit layer which is not covered by the black matrix 106 is also higher, which causes a poor light emitting effect of the OLED panel, and is not favorable for the display effect of the OLED panel.

As shown in fig. 2, an embodiment of the present invention discloses a display panel. The display panel comprises a substrate 201, a driving circuit layer 202, an organic light emitting layer, a thin film encapsulation layer 301 and a color filter layer which are sequentially stacked. The organic light emitting layer is disposed on one side of the substrate 201, and includes an OLED pixel 203 and a pixel defining layer 204 for defining an area where the OLED pixel 203 is located. Specifically, the organic light emitting layer includes a pixel defining layer 204 and a pixel region defined by the pixel defining layer 204, and the OLED pixel 203 is disposed in the pixel region. The driving circuit layer 202 is located between the substrate 201 and the organic light emitting layer.

The thin film encapsulation layer 301 is located on a side of the organic light emitting layer away from the substrate 201, and includes a plurality of organic thin films having a light-transmitting portion 205 and a non-light-transmitting portion 206. The non-light-transmitting portion 206 is made of a black opaque material or filled with anti-reflection particles. That is, the thin film encapsulation layer 301 is formed by alternately laminating an inorganic thin film 207 and an organic thin film, wherein the organic thin film has a light-transmitting portion 205 and a non-light-transmitting portion 206. The projection of the light-transmitting portion 205 on the substrate 201 coincides with the projection of the OLED pixel 203 on the substrate 201.

The opaque black material may be a photosensitive resin composition, and the photosensitive resin composition may include a binder resin, a photopolymerizable monomer, a photopolymerization initiator, a black colorant, a solvent, and the like. The anti-reflection particles can comprise carbon powder particles, and the anti-reflection particles can be made of titanium dioxide and the like.

The color filter layer is located on a side of the thin film encapsulation layer 301 away from the substrate 201, and the color filter layer includes color films 208 disposed above the OLED pixels 203, and a black matrix 209 disposed between adjacent color films 208. The color film 208 forms a first projection region on the substrate 201, the OLED pixel 203 forms a second projection region on the substrate 201, and the non-light-transmitting portion 206 of the organic film in the film encapsulation layer 301 forms a third projection region on the substrate 201. And a fourth projection area is formed in the first projection area except for the intersection area of the first projection area and the second projection area. The third projection area covers the fourth projection area. That is, the third projection region includes the fourth projection region described above.

In this embodiment, the organic thin film layer in the thin film encapsulation layer 301 is set to be made of black opaque material or the non-light-transmitting portion 206 filled with anti-reflection particles, so as to cover the reflected light transmitted out of the metal wire portion in the driving circuit layer 202, thereby reducing the reflectivity of the metal wire portion, facilitating the reduction of the reflectivity of the OLED device, and improving the display effect of the OLED display panel.

In another embodiment of the present application, as shown in fig. 3, in addition to any of the above embodiments, contact surfaces of the black matrix 209 and the color filter 208 in the color filter layer are both inclined slope surfaces, and a first slope surface formed on an end surface of the black matrix 209 is away from the color filter 208 as a distance between the black matrix 209 and the substrate 201 increases, and gradually approaches the color filter 208 as a distance between the black matrix 209 and the substrate 201 gradually decreases. The black matrix 209 is made of black opaque material.

In this embodiment, the black matrix 209 is used to shield the reflected light transmitted through the metal trace portion in the driving circuit layer 202, which is beneficial to reducing the reflectivity of the OLED device and improving the display effect of the OLED display panel.

Optionally, in another embodiment, on the basis of any of the above embodiments, a plane of the first slope surface passes through a central point of an end surface of the OLED pixel 203 on the side close to the substrate 201, and an included angle (α shown in fig. 3) formed between the first slope surface and the thickness direction of the display panel is in a range of 0 ° to 80 °.

Alpha in fig. 3 is also a large-viewing-angle brightness attenuation angle, so that the large-viewing-angle brightness attenuation angle is increased while the low reflectivity of the OLED panel is ensured by adopting an oblique patterning design for the contact end face of the black matrix 209 and the color film 208, the outdoor visual function of the OLED panel is enhanced, and the problem that the reflectivity of the OLED panel is increased due to the fact that the opening size of the color film 208 needs to be increased is solved.

It should be noted that the thin film encapsulation layer 301 in this embodiment may adopt the structural design in the above-mentioned embodiment, and may also adopt a conventional encapsulation structural design in the prior art, that is, the above-mentioned embodiment implemented by using a thin film encapsulation layer of a conventional structure is also within the protection scope of the present application.

In another embodiment of the present application, based on any of the above embodiments, the pixel defining layer 204 is made of the black opaque material. Therefore, the pixel defining layer 204 made of black opaque material is used for shielding the reflected light transmitted by the metal wiring part in the driving circuit layer 202, so that the reflectivity of the metal wiring part can be reduced, the reflectivity of the OLED device can be reduced, and the display effect of the OLED display panel can be improved.

In another embodiment, as shown in fig. 4, on the basis of any of the above embodiments, a surface of the pixel defining layer 204 facing away from the substrate 201 is coated with a black opaque material to form a black pixel defining layer 401. Therefore, on the premise of shielding the reflected light transmitted by the metal wiring part in the driving circuit layer 202, the surface of one side of the pixel defining layer 204 is made of black opaque material, which is beneficial to saving the process, and reducing the manufacturing cost and the manufacturing time of the panel.

Alternatively, in another embodiment, as shown in fig. 5, the pixel defining layer 204 coated with black opaque material forms a fifth projection area on the substrate 201, and the fourth projection area coincides with the fifth projection area. That is, the black opaque material is only partially coated on one side surface of the pixel defining layer 204, and the black pixel defining layer 401 only covers a partial surface of the pixel defining layer. Therefore, on the premise of shielding the reflected light transmitted by the metal wiring part in the driving circuit layer 202, the whole side surface is not required to be coated with black opaque materials, so that the manufacturing process of the display panel can be saved, and the manufacturing cost and the manufacturing time of the panel are further reduced.

The black opaque material may be a photosensitive resin composition, including a binder resin, a photopolymerizable monomer, a photopolymerization initiator, a black colorant, a solvent, and the like.

Optionally, in another embodiment, referring to fig. 3, the contact surfaces of the pixel defining layer 204 and the OLED pixel 203 are both inclined slopes, and a second slope formed by the end surface of the pixel defining layer 204 is away from the OLED pixel 203 as the distance between the pixel defining layer 204 and the substrate 201 increases. In this embodiment, the first slope surface is parallel to the second slope surface, which is beneficial to increasing the brightness attenuation angle with a large viewing angle and enhancing the outdoor visual function of the OLED panel.

In another embodiment of the present application, based on any of the above embodiments, as shown in fig. 6, the display panel further includes an anti-reflection film 601 and a sealing cover 602. The package cover 602 is located on a side of the color filter layer away from the substrate 201. In this embodiment, the anti-reflection film 601 is located between the color filter layer and the cover 602. In other embodiments, the antireflection film 601 may also be located on a side of the package cover 602 away from the substrate 201, on a side of the film package layer 301 away from the substrate 201, or between the film package layer 301 and the color filter layer. The anti-reflection film 601 can weaken reflected light transmitted by the metal wiring part in the driving circuit layer 202, so that the reflectivity of the OLED device can be reduced, and the display effect of the OLED display panel can be improved.

The antireflection film 601 may be formed by alternately stacking two or more layers including a metal material film (Cr, Mo, Ti, etc.) and a dielectric material film (SiO 2, etc.). The external light is absorbed or emitted by the metal material film, and the dielectric material film can adjust or compensate the phase difference of the light, so that the light generates destructive interference, the reflection is reduced, and the contrast is improved. The transmittance of the antireflective film 601 is greater than 44%. The anti-reflection film 601 can be realized by using the prior art, and the description of this embodiment is omitted.

The anti-reflection film 601 may be an anti-reflection film, and the anti-reflection film includes an optical anti-reflection film, wherein the thickness of the optical anti-reflection film is 1/4 of the wavelength of visible light.

It should be noted that all the above embodiments in the present application can be combined arbitrarily, and the combined embodiments are within the scope of protection of the present application.

As shown in fig. 7, an embodiment of the present application further discloses a manufacturing method of a display panel, which is used for manufacturing the display panel disclosed in the foregoing embodiment, and the manufacturing method includes the following steps:

s10, providing a substrate.

And S20, forming an organic light emitting layer on the substrate. The organic light emitting layer includes an OLED pixel.

And S30, manufacturing a film packaging layer on the side of the organic light-emitting layer, which is far away from the substrate. The film encapsulation layer includes a plurality of organic films having a light-transmitting portion and a non-light-transmitting portion. The non-light-transmitting part is made of black opaque materials or filled with anti-reflection particles.

And S40, manufacturing a color filter layer on the side of the film packaging layer, which is far away from the substrate. The color filter layer comprises a color film arranged above the OLED pixels. The color film forms a first projection area based on the substrate, the OLED pixels form a second projection area based on the substrate, a non-light-transmitting part of an organic film in the film packaging layer forms a third projection area based on the substrate, and an area of the first projection area excluding an intersection area of the first projection area and the second projection area forms a fourth projection area. The third projection area covers the fourth projection area.

An embodiment of the utility model also discloses a display device, including the display panel that any above-mentioned embodiment is disclosed. For detailed structural features and advantages of the display panel, reference may be made to the description of the above embodiments, which are not repeated herein. In specific implementation, the display device provided in the embodiments of the present disclosure may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a media player, a watch device, a pendant device, an earphone or a headphone device, a navigation device, a wearable or miniature device, an embedded device of a system in which an electronic device having a display is installed in a self-service terminal or an automobile, and the like.

In summary, the display panel and the display device disclosed in the present application have at least the following advantages:

the application discloses display panel and display device sets up through the organic thin layer in the film encapsulation layer and adopts black opaque material or fill the non-printing opacity portion that has the anti-reflection granule, and/or adopts slope patterning design at the contact terminal surface of black matrix and various membrane, and/or adopts black material to pixel definition layer, realizes hiding the reverberation that the metal in the drive circuit layer was walked the partial transmission of line, is favorable to reducing OLED device reflectivity, promotes OLED display panel's display effect.

On the other hand, the oblique patterning design is adopted for the contact end face of the black matrix and the color film, the large-visual-angle brightness attenuation angle is increased while the low reflectivity of the OLED panel is ensured, the outdoor visual function of the OLED panel is enhanced, and the problem that the reflectivity of the OLED panel is increased due to the fact that the opening size of the color film needs to be increased is solved.

In the description of the present invention, it is to be understood that the terms "bottom", "longitudinal", "lateral", "up", "down", "front", "back", "vertical", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the structures or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more and "several" means one or more unless otherwise specified.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A display panel, comprising:

a substrate;

the thin film packaging layer is positioned on one side of the organic light-emitting layer, which is far away from the substrate, and comprises a plurality of layers of organic thin films with light-transmitting parts and non-light-transmitting parts; and

2. The display panel according to claim 1, wherein the color filter layer further includes a black matrix disposed between adjacent color films, contact surfaces of the black matrix and the color films are inclined slope surfaces, and a first slope surface formed by an end surface of the black matrix is away from the color films as a distance between the black matrix and the substrate increases.

3. The display panel of claim 2, wherein the organic light emitting layer further comprises a pixel defining layer for defining an area where the OLED pixel is located, contact surfaces of the pixel defining layer and the OLED pixel are both inclined slopes, a second slope formed by an end surface of the pixel defining layer is away from the OLED pixel as a distance between the pixel defining layer and the substrate increases, and the first slope is parallel to the second slope.

4. The display panel of claim 2, wherein a plane of the first slope surface passes through a central point of an end surface of the OLED pixel on a side close to the substrate, and an included angle formed between the first slope surface and a thickness direction of the display panel is in a range of 0 ° to 80 °.

5. The display panel of claim 1, further comprising an antireflective film on a side of the film encapsulation layer facing away from the substrate.

6. The display panel of claim 5, wherein the display panel further comprises an encapsulation cover plate, wherein the encapsulation cover plate is located on a side of the color filter layer facing away from the substrate, and wherein the anti-reflection film is located between the color filter layer and the encapsulation cover plate or on a side of the encapsulation cover plate facing away from the substrate.

7. The display panel according to claim 1, further comprising a driving circuit layer between the substrate and the organic light emitting layer.

8. A display device comprising the display panel according to any one of claims 1 to 7.