CN213071171U - Display panel and display device - Google Patents

Abstract

The disclosure relates to the technical field of display, and provides a display panel and a display device. The display panel may include a driving backplane, a pixel defining layer, a light emitting unit, and a reflective layer. The pixel definition layer is arranged on the driving backboard and provided with a plurality of openings for exposing the driving backboard. The number of the light-emitting units is multiple, and the light-emitting units are correspondingly arranged in the openings one by one. The reflecting layer is arranged on one side, away from the driving backboard, of the pixel definition layer, and is provided with a plurality of through holes which are in one-to-one correspondence with the openings. The present disclosure can improve the life of the display panel.

Description

Display panel and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

With the rapid development of display technology, the organic electroluminescent display panel has a wide application prospect due to the advantages of high response, high contrast, flexibility and the like.

At present, in order to further enrich the functions of the display panel, people set a mirror display glass on the display panel so that the display panel can act as a reflector when not emitting light. However, the display panel provided with the mirror display glass has a low lifetime.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a display panel and a display device, which can improve the life of the display panel.

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

driving the back plate;

the pixel definition layer is arranged on the driving backboard and provided with a plurality of openings for exposing the driving backboard;

the light-emitting units are arranged in the openings in a one-to-one correspondence manner;

the reflecting layer is arranged on one side, away from the driving back plate, of the pixel defining layer, and is provided with a plurality of through holes, and the through holes are in one-to-one correspondence with the openings.

Further, the lateral wall of through-hole is the heat conduction material, display panel still includes:

and the filling pieces are filled in the through holes in a one-to-one correspondence manner, and the filling pieces are made of transparent heat conduction materials.

Further, the reflective layer is made of a conductive material, and the display panel further includes:

and the filling pieces are filled in the through holes in a one-to-one correspondence manner, and the material of each filling piece is transparent conductive material.

Further, the light emitting unit includes:

the anode layer covers the area of the driving back plate exposed to the opening;

the light-emitting material layer is arranged on one side of the anode layer, which is far away from the driving back plate;

the cathode layer is arranged on one side, far away from the anode layer, of the light-emitting material layer;

the filling piece is positioned on one side of the cathode layer, which is far away from the light-emitting material layer, and the refractive index of the filling piece is greater than that of the cathode layer.

Further, the material of the reflecting layer is metal.

Further, the reflective layer includes:

the shell is provided with a cavity, the shell is made of metal, and the cavity is filled with polymer materials.

Further, the material of the filling member includes graphene.

Further, the side wall of the through hole is located at the outer side of the light emitting unit.

Further, the display panel further includes:

and the packaging layer is arranged on one side of the reflecting layer, which is far away from the pixel defining layer.

According to an aspect of the present disclosure, a display device is provided, which includes the display panel described above.

The display panel and the display device are in a display state when the light-emitting unit emits light, and in a mirror state when the light-emitting unit does not emit light. A plurality of openings on the pixel definition layer are located in a plurality of light-emitting units in the display panel in a one-to-one correspondence mode, a plurality of through holes in the reflection layer correspond to the openings in the one-to-one correspondence mode, light rays emitted by the light-emitting units can be prevented from being blocked by the reflection layer, the fact that the brightness of the display panel in a display state is reduced is avoided, the power consumption of the display panel is not required to be increased when the reflection layer is arranged, the problem that the service life of the display panel is shortened due to the fact that the power consumption of the display panel is increased is solved, and therefore the service life of the.

Drawings

Fig. 1 is a schematic plan view of a display panel of an embodiment of the present disclosure.

Fig. 2 is a cross-sectional view a-a of the structure shown in fig. 1.

Fig. 3 is a schematic diagram of a pixel defining layer and a reflective layer in a display panel according to an embodiment of the present disclosure.

Fig. 4 is a schematic view of the structure of fig. 2 with a filler element.

Fig. 5 is a schematic view of a reflective layer in the structure shown in fig. 2.

Description of reference numerals: 1. driving the back plate; 101. a substrate; 102. a drive transistor; 103. a planarization layer; 2. a light emitting unit; 201. a cathode layer; 202. a light emitting material layer; 203. an anode layer; 3. a pixel defining layer; 301. an opening; 4. a reflective layer; 401. a through hole; 402. a housing; 403. a cavity; 5. a packaging layer; 6. a filling member; 7. a light emitting region; 8. a light reflecting region.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

In the related art, the mirror display product is realized by arranging mirror display glass outside the display panel, but the transmittance of the common mirror display glass is lower, which is about 15%, so that the brightness utilization rate of the display panel is greatly reduced, and the brightness of the display panel is required to be improved to meet the requirements of customers. The use of the display panel with high power consumption may cause the temperature inside the display panel to rise, accelerate the aging of elements, and reduce the service life of the display panel.

The disclosed embodiments provide a display panel. As shown in fig. 2 and 3, the display panel may include a driving backplane 1, a pixel defining layer 3, a light emitting unit 2, and a reflective layer 4, wherein:

the pixel definition layer 3 is disposed on the driving backplate 1, and the pixel definition layer 3 has a plurality of openings 301 exposing the driving backplate 1. The number of the light emitting units 2 is plural, and the plural light emitting units 2 are correspondingly disposed in the plural openings 301. The reflective layer 4 is disposed on a side of the pixel defining layer 3 away from the driving backplane 1, and the reflective layer 4 has a plurality of through holes 401, wherein the plurality of through holes 401 are in one-to-one correspondence with the plurality of openings 301.

In the display panel according to the embodiment of the present disclosure, the display panel is in a display state when the light emitting unit 2 emits light, and the display panel is in a mirror state when the light emitting unit 2 does not emit light. A plurality of openings 301 of pixel definition layer 3 are located to a plurality of luminescence unit 2 one-to-one in this display panel, and a plurality of through-holes 401 and a plurality of openings 301 one-to-one on the reflection stratum 4, can prevent that reflection stratum 4 from blockking the light that luminescence unit 2 sent, avoid display panel luminance under the display mode to take place to reduce, need not to increase display panel's consumption when setting up reflection stratum 4, the problem of the life-span reduction of display panel because display panel's consumption increase leads to has been solved, thereby display panel's life-span has been improved.

The following describes each part of the display panel according to the embodiment of the present disclosure in detail:

as shown in fig. 2, the driving backplane 1 may include a substrate 101 and a driving circuit layer. The substrate 101 may be a flexible substrate 101, such as a polyimide substrate, etc., but the embodiments of the present disclosure are not limited thereto. The driver circuit layer may be provided on the substrate 101. The driving circuit layer may include a driving transistor 102. The driving transistor 102 may be a thin film transistor. The thin film transistor may be a top gate thin film transistor, and of course, the thin film transistor may also be a bottom gate thin film transistor. Taking a thin film transistor as an example of a top gate type thin film transistor, the thin film transistor may include an active layer, a gate insulating layer, a gate electrode, an interlayer insulating layer, a source electrode, and a drain electrode. The active layer may be provided on the substrate 101. The active layer may include an undoped channel region, a source region, and a drain region. The gate insulating layer may be provided on the substrate 101 and cover the active layer. The gate electrode may be provided on a side of the gate insulating layer remote from the substrate 101. The interlayer insulating layer may be disposed on the gate insulating layer and cover the gate electrode. The source and drain electrodes may be disposed on the interlayer insulating layer and coupled to the source and drain regions of the active layer via vias passing through the interlayer insulating layer and the gate insulating layer. The driving backplate 1 may further comprise a planarization layer 103. The planarization layer 103 may be disposed on the interlayer insulating layer and cover the source and drain electrodes of the thin film transistor.

As shown in fig. 2 and 3, the pixel defining layer 3 is disposed on the driving backplane 1. Specifically, the pixel defining layer 3 may be disposed on a side of the planarization layer 103 away from the substrate 101. The pixel definition layer 3 may be provided with a plurality of openings 301 exposing the driving backplane 1, i.e. the planarization layer 103 is exposed through the openings 301 of the pixel definition layer 3.

As shown in fig. 1, the display panel may include a plurality of light emitting regions 7 arranged at intervals and a light reflecting region 8 surrounding the light emitting regions 7. The plurality of light reflecting regions 8 may form a mirror when the light emitting region 7 does not emit light. As shown in fig. 2 and 3, the number of the light emitting units 2 is plural, and the plural light emitting units 2 are correspondingly disposed in the plural openings 301 one by one to form plural pixels, thereby forming the plural light emitting regions 7. The light emitting unit 2 may include a red light emitting unit, a green light emitting unit, and a blue light emitting unit. The light emitting unit 2 disposed in the opening 301 of the pixel defining layer 3 can be electrically connected to the source or the drain of the thin film transistor through the via hole on the planarization layer 103. Each light emitting cell 2 may include an anode layer 203, a light emitting material layer 202, and a cathode layer 201. The anode layer 203 may cover the area of the driving backplate 1 exposed to the opening 301, i.e. the anode layer 203 may be disposed on the planarization layer 103 and electrically connected to the source or drain of the thin film transistor via the via hole penetrating through the planarization layer 103. The luminescent material layer 202 may be disposed on a side of the anode layer 203 away from the driving backplane 1. The cathode layer 201 may be provided on a side of the layer 202 of light emitting material remote from the anode layer 203. Wherein a plurality of light emitting cells 2 may share one cathode layer 201. In addition, a hole injection layer and a hole transport layer may be provided between the anode layer 203 and the light emitting material layer 202. A hole blocking layer and an electron transport layer may also be provided between the cathode layer 201 and the light emitting material layer 202. The anode layer 203 is a transparent anode layer 203, and the material of the anode layer 203 may be ITO-Ag-ITO or the like. The cathode layer 201 is a transparent cathode layer 201, and the material of the cathode layer 201 may be magnesium-silver alloy or the like.

As shown in fig. 2 and 3, the reflective layer 4 is disposed on a side of the pixel defining layer 3 away from the driving backplane 1. The reflective layer 4 is capable of emitting light to act as a mirror, thereby forming the reflective region 8 described above. The reflective layer 4 is provided with a plurality of through holes 401. The plurality of through holes 401 are in one-to-one correspondence with the plurality of openings 301, that is, the plurality of through holes 401 are in one-to-one correspondence with the plurality of light emitting units 2 disposed in the plurality of openings 301, that is, each light emitting unit 2 is exposed through the corresponding through hole 401, so that light emitted by the light emitting unit 2 can pass through the through hole 401, and the light emitted by the light emitting unit 2 is prevented from being blocked by the reflective layer 4. Wherein the sidewall of each through hole 401 is located outside the corresponding light emitting unit 2, that is, the orthographic projection of the sidewall of the through hole 401 on the driving back plate 1 surrounds the orthographic projection of the light emitting unit 2 on the driving back plate 1. The display panel of the embodiment of the present disclosure may further include an encapsulation layer 5. The encapsulation layer 5 may be arranged on a side of the reflective layer 4 remote from the pixel defining layer 3, so that the reflective layer 4 is integrated in the display panel. The encapsulation layer 5 may be a thin film encapsulation layer, but the embodiment of the present disclosure is not limited thereto.

As shown in fig. 2 to 4, the display panel may further include a plurality of filling members 6. The plurality of filling members 6 are transparent filling members 6. The plurality of filling members 6 are filled in the plurality of through holes 401 in a one-to-one correspondence. The filling members 6 may be located on a side of the cathode layer 201 away from the light emitting material layer 202, and the refractive index of each filling member 6 is greater than the refractive index of the corresponding cathode layer 201 of the light emitting unit 2, so as to reduce total reflection, and enable more photons to exit, thereby obtaining a higher light-exiting rate. The refractive index of the filling member 6 may be 2.0-2.3, such as 2.0, 2.1, 2.2, 2.3, etc. In an embodiment of the present disclosure, the sidewall of the through hole 401 is made of a heat conductive material, and the filling member 6 is made of a transparent heat conductive material, so that the heat conductive performance of the display panel can be improved. In another embodiment of the present disclosure, the reflective layer 4 is made of a conductive material, and the filler 6 is made of a transparent conductive material, so as to reduce the thickness of the cathode layer 201, enhance the light transmittance of the cathode layer 201, and reduce the surface resistance of the cathode layer 201, thereby reducing the power supply voltage drop (IR-drop), and effectively improving the display brightness of the display panel. Wherein, the light transmittance of the filling member 6 may be 70-80%.

As shown in fig. 2 and 4, in an embodiment of the present disclosure, the material of the reflective layer 4 may be a metal, such as silver, aluminum, titanium, zinc, indium, gallium, and the like. Of course, the material of the reflective layer 4 may also be an alloy. The reflective layer 4 may be formed by stacking a plurality of metal sublayers, but the embodiment of the present disclosure is not limited thereto. The reflective layer 4 is made of metal, so that the sidewall of the through hole 401 has a certain heat conduction performance, and the reflective layer 4 has a certain electric conduction performance. As shown in fig. 4 and 5, in another embodiment of the present disclosure, the reflective layer 4 may include a housing 402. The material of the housing 402 may be a metal, such as silver, aluminum, titanium, zinc, indium, gallium, and the like. Of course, the material of the housing 402 may also be an alloy. The housing 402 may have a cavity 403. The cavity 403 may be filled with a polymer material. The polymer material may be polyimide, but may be resin or the like. The polymer material is filled in the shell 402 made of the metal material, so that the reflective layer 4 can be ensured to have certain electric conductivity and heat conductivity, and the weight of the reflective layer 4 can be reduced, thereby reducing the weight of the display panel.

As shown in fig. 2 and 4, the material of the filling member 6 may include graphene, so that the filling member 6 is both a transparent heat conducting material and a transparent electric conducting material. Further, the filler 6 may include multiple layers of graphene. The multi-layer graphene may be distributed along a direction perpendicular to the substrate 101. The multilayer graphene has poor heat conductivity in the direction perpendicular to the substrate 101 and high heat conductivity in the direction parallel to the substrate 101, so that the filling member 6 can rapidly disperse heat in the direction parallel to the substrate 101 to improve the heat dissipation performance of the display panel. Wherein the reflective layer 4 can spread heat in a direction perpendicular to the substrate 101 after the filler 6 conducts the heat to the sidewall of the through-hole 401 described above. The filler 6 may be a sheet of graphene material. The graphene material sheet may be parallel to the substrate 101. In addition, the graphene may be doped with zinc oxide (ZnO), that is, the material of the filler 6 may include a ZnO/graphene composite material, so as to improve the ultraviolet resistance of the display panel.

The embodiment of the disclosure also provides a display device. The display device may include the display panel described in any of the above embodiments. The display device may be a mobile phone, a computer, a television, a camera, a wearable display, a navigator, a vehicle-mounted display, and the like, but the embodiment of the disclosure is not particularly limited thereto. Since the display panel in the display device of the embodiment of the present disclosure is the same as the display panel in the embodiment of the display panel, the display device has the same beneficial effects, and the description thereof is omitted.

Although the present disclosure has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure.

Claims (10)

1. A display panel, comprising:

driving the back plate;

the pixel definition layer is arranged on the driving backboard and provided with a plurality of openings for exposing the driving backboard;

the light-emitting units are arranged in the openings in a one-to-one correspondence manner;

the reflecting layer is arranged on one side, away from the driving back plate, of the pixel defining layer, and is provided with a plurality of through holes, and the through holes are in one-to-one correspondence with the openings.

2. The display panel of claim 1, wherein the sidewalls of the through-holes are thermally conductive, the display panel further comprising:

and the filling pieces are filled in the through holes in a one-to-one correspondence manner, and the filling pieces are made of transparent heat conduction materials.

3. The display panel of claim 1, wherein the reflective layer is a conductive material, the display panel further comprising:

and the filling pieces are filled in the through holes in a one-to-one correspondence manner, and the material of each filling piece is transparent conductive material.

4. The display panel according to claim 2 or 3, wherein the light-emitting unit comprises:

the anode layer covers the area of the driving back plate exposed to the opening;

the light-emitting material layer is arranged on one side of the anode layer, which is far away from the driving back plate;

the cathode layer is arranged on one side, far away from the anode layer, of the light-emitting material layer;

the filling piece is positioned on one side of the cathode layer, which is far away from the light-emitting material layer, and the refractive index of the filling piece is greater than that of the cathode layer.

5. The display panel according to claim 2 or 3, wherein the material of the reflective layer is a metal.

6. The display panel according to claim 2 or 3, wherein the reflective layer comprises:

the shell is provided with a cavity, the shell is made of metal, and the cavity is filled with polymer materials.

7. The display panel according to claim 2 or 3, wherein a material of the filler includes graphene.

8. The display panel according to claim 1, wherein a sidewall of the through hole is located outside the light emitting unit.

9. The display panel according to claim 1, characterized in that the display panel further comprises:

and the packaging layer is arranged on one side of the reflecting layer, which is far away from the pixel defining layer.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.

Images