CN113380197A

CN113380197A - Display panel and display device

Info

Publication number: CN113380197A
Application number: CN202110633623.2A
Authority: CN
Inventors: 张慧婕; 张鼎; 宋先保
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-09-10
Anticipated expiration: 2041-06-07
Also published as: CN113380197B

Abstract

In the correspondingly arranged light emitting device group and pixel circuit group, a first light emitting device is correspondingly and electrically connected with a first output end of a first pixel circuit, and a second light emitting device is correspondingly and electrically connected with a second output end of a second pixel circuit; the second light emitting device at least partially overlaps the corresponding second pixel circuit in a plane perpendicular to the thickness direction of the display panel, and the first light emitting device has a first displacement with respect to the corresponding first driving transistor

The first output terminal has a second displacement relative to the corresponding first drive transistor

The second output terminal has a third displacement relative to the second drive transistor

The fourth bit shift

First displacement

And the fourth shift

The included angle therebetween is less than 90 deg.. The embodiment of the application provides a display panel and a display device, which reduce the length of a connecting wire between a first output end and a first light-emitting device electrically connected with the first output end, and improve the light transmittance of the display panel and the display device.

Description

Display panel and display device

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

With the increase of consumer demand, full-screen display is becoming the mainstream display technology. The current full-face screen display sets up the printing opacity district in the display area usually, and printing opacity district position is used for setting up optical device, because printing opacity district does not set up in the non-display area, then the frame of display screen narrows, and then can realize full-face screen display.

Meanwhile, in order to enable consumers to obtain a better viewing experience, sub-pixels are generally arranged in the light-transmitting area and used for light-emitting display, and the existence of light-emitting devices, pixel circuits and the like included in the sub-pixels can affect the light transmittance of the light-transmitting area and further affect the optical performance of the optical device.

[ application contents ]

In view of the above, embodiments of the present application provide a display panel and a display device.

In a first aspect, an embodiment of the present application provides a display panel, which includes a plurality of light emitting device groups and a plurality of pixel circuit groups, where the light emitting device groups and the pixel circuit groups are arranged in a one-to-one correspondence; the light emitting device group comprises a plurality of light emitting devices including at least a first light emitting device and a second light emitting deviceTwo light emitting devices; the pixel circuit group comprises a plurality of pixel circuits, the pixel circuits at least comprise a first pixel circuit and a second pixel circuit, the first pixel circuit comprises a first driving transistor and a first output end, and the second pixel circuit comprises a second driving transistor and a second output end; in the correspondingly arranged light emitting device group and pixel circuit group, the first light emitting device is correspondingly and electrically connected with the first output end of the first pixel circuit, and the second light emitting device is correspondingly and electrically connected with the second output end of the second pixel circuit; the second light emitting device at least partially overlaps the corresponding second pixel circuit in a plane perpendicular to the thickness direction of the display panel, and the first light emitting device has a first displacement with respect to the corresponding first driving transistor

The fourth bit shift

First displacement

And the fourth shift

The included angle therebetween is less than 90 deg..

In one implementation manner of the first aspect, the plurality of pixel circuit groups are arranged along a first direction and a second direction, and the pixel circuits in the pixel circuit groups are arranged along the first direction, and the first direction is perpendicular to the second direction; the first pixel circuit is separated from the first light emitting device in a plane perpendicular to a thickness direction of the display panel.

In one implementation manner of the first aspect, the plurality of pixel circuits in the pixel circuit group includes a first pixel circuit, a second pixel circuit, and a third pixel circuit; the plurality of light emitting devices in the light emitting device group comprise a first light emitting device, a second light emitting device and a third light emitting device, and the third light emitting device is electrically connected with the third pixel circuit; in the same light emitting device group, the first light emitting device and the second light emitting device are arranged along a second direction, and along the second direction, the third light emitting device is positioned on one side of the first light emitting device and one side of the second light emitting device; in the correspondingly arranged pixel circuit group and the light emitting device group, the third light emitting device and the third pixel circuit at least partially overlap in a plane perpendicular to the thickness direction of the display panel.

In one implementation manner of the first aspect, the display panel includes a regular display area and a functional display area, and the light transmittance of the functional display area is greater than that of the regular display area; the light emitting device group and the pixel circuit group are arranged in the functional display area.

In one implementation manner of the first aspect, the light emitting device group further includes a first connection portion, and the first light emitting device includes a first electrode connected to the first connection portion and electrically connected to the first output terminal through the first connection portion; the first electrode includes a metal electrode and a transparent conductive electrode which are stacked in a thickness direction of the display panel, and the first connection portion includes the transparent conductive electrode and at least a partial region thereof does not include the metal electrode.

In one implementation manner of the first aspect, in a thickness direction of the display panel, the first pixel circuits of the first light emitting device include an insulating layer therebetween, and the insulating layer includes a first via hole; the first connecting portion includes a first via portion, the first via portion is disposed in the first via, and one end of the first via portion is connected to the first pixel circuit.

In one implementation of the first aspect, the first via portion is free from overlapping with the metal electrode in a thickness direction of the display panel.

In one implementation form of the first aspect, the first connection portion further includes a first connection line located between the first via portion and the first electrode; the first connecting line and the metal electrode are not overlapped along the thickness direction of the display panel.

In one implementation manner of the first aspect, the light emitting device group further includes a second connection portion, and the second light emitting device is electrically connected to the second output end through the second connection portion; the insulating layer further comprises a second through hole, and the second connecting portion is located in the second through hole.

In a second aspect, an embodiment of the present application provides a display device, including the display panel provided in the first aspect.

In one implementation form of the second aspect, the display panel further comprises an optical function element; the display panel comprises a conventional display area and a functional display area, the light transmittance of the functional display area is greater than that of the conventional display area, and the light-emitting device group and the pixel circuit group are arranged in the light-transmitting display area; the optical functional element is arranged at the position of the display device corresponding to the functional display area, and the optical functional element is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera and a flashlight.

In the display panel and the display device provided by the embodiment of the application, the position of the first output end is moved to the direction of the first light-emitting device electrically connected with the first output end, so that the length of a connecting line between the first output end and the first light-emitting device electrically connected with the first output end can be reduced, the shading area of the display panel and the display device can be reduced, and the light transmittance of the display panel and the display device is improved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a display panel and a display device according to an embodiment of the present disclosure;

FIG. 2 is a partial view of FIG. 1;

fig. 3 is a partial schematic view of a pixel circuit board of a display panel according to an embodiment of the present disclosure;

fig. 4 is an equivalent circuit diagram of a pixel circuit according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a display panel according to an embodiment of the present application;

FIG. 6 is a schematic diagram of another display panel according to an embodiment of the present disclosure;

fig. 7 is a partial cross-sectional view of a display panel according to an embodiment of the present application;

fig. 8 is a partial cross-sectional view of another display panel provided in the embodiments of the present application;

fig. 9 is a partial cross-sectional view of another display panel provided in the embodiment of the present application;

fig. 10 is a schematic diagram of a display device according to an embodiment of the present application.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should 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.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application 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 be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.

It should be understood that although the terms first, second, third, etc. may be used to describe the via hole, the pixel circuit, the light emitting device, etc. in the embodiments of the present application, these via hole, pixel circuit, light emitting device, etc. should not be limited to these terms. These terms are only used to distinguish vias, pixel circuits, light emitting devices, and the like from one another. For example, the first light emitting device may also be referred to as a second light emitting device, and similarly, the second light emitting device may also be referred to as a first light emitting device, without departing from the scope of the embodiments of the present application.

The applicant provides a solution to the problems of the prior art through intensive research.

Fig. 1 is a display panel and a display device according to an embodiment of the present application, and fig. 2 is a partial schematic view of fig. 1.

Referring to fig. 1, the display panel includes a plurality of light emitting device groups 01 and a plurality of pixel circuit groups 02. The light emitting device group 01 and the pixel circuit group 02 are arranged in one-to-one correspondence.

The light emitting device group 01 includes a plurality of light emitting devices 11 therein, and the plurality of light emitting devices 11 included in one light emitting device group 01 includes at least a first light emitting device 111 and a second light emitting device 112. The light emitting device 11 may be specifically a self-light emitting device, such as an organic light emitting diode or a micro diode.

The pixel circuit group 02 includes a plurality of pixel circuits 20, and the plurality of pixel circuits 20 included in one pixel circuit group 01 includes at least a first pixel circuit 21 and a second pixel circuit 22.

Fig. 3 is a partial schematic view of a pixel circuit board in a display panel according to an embodiment of the present disclosure.

Referring to fig. 2 and fig. 3, the first pixel circuit 21 includes a first driving transistor T01 and a first output end 210, and in the correspondingly disposed light emitting device group 01 and the pixel circuit group 02, the first light emitting device 111 is electrically connected to the first output end 210 included in the first pixel circuit 21.

Referring to fig. 2 and fig. 3, the second pixel circuit 22 includes a second driving transistor T02 and a second output terminal 220, and in the correspondingly disposed light emitting device group 01 and pixel circuit group 02, the second light emitting device 112 is electrically connected to the second output terminal 220 included in the second pixel circuit 22.

In the pixel circuit group 02 and the light emitting device group 01 which are provided correspondingly, the pixel circuit 20 supplies a driving voltage or a driving current necessary for light emission to the light emitting devices which are electrically connected correspondingly.

Fig. 4 is an equivalent circuit diagram of a pixel circuit provided in the present application. It should be noted that the configurations of the pixel circuits included in the pixel circuit group 02 in the display panel provided in the embodiment of the present application may be the same. The following describes the configuration and operation of the pixel circuit with reference to fig. 3 and 4.

The pixel circuit 20 may include a driving transistor T0, reset transistors T1 and T1', a power voltage writing transistor T2, a data voltage writing transistor T3, a threshold grasping transistor T4, and a light emission control transistor T5. In the following description, the driving transistor T0, the reset transistors T1 and T1', the power supply voltage writing transistor T2, the data voltage writing transistor T3, the threshold grasping transistor T4, and the light emission control transistor T5 are all P-type transistors, by way of example. In other alternative embodiments, the driving transistor T0, the reset transistors T1 and T1', the power voltage writing transistor T2, the data voltage writing transistor T3, the threshold grasping transistor T4, and the light emission controlling transistor T5 may be all N-type transistors, or may be P-type transistors and N-type transistors.

The source V1 of the reset transistor T1 is electrically connected to the reset signal line VL2, and the drain of the reset transistor T1 is electrically connected to the gate of the driving transistor T0. The source V1 ' of the reset transistor T1 ' is electrically connected to the reset signal line VL2, and the drain of the reset transistor T1 ' is electrically connected to the output terminal 200 of the pixel circuit 20 (i.e., to one terminal of the light emitting device 11); a source V2 of the power supply voltage writing transistor T2 is electrically connected to a power supply voltage line VL1, and a drain of the power supply voltage writing transistor T2 is electrically connected to a source of the driving transistor T0; a source V3 of the data voltage writing transistor T3 is electrically connected to the data signal line DL1, and a drain of the data voltage writing transistor T3 is electrically connected to the source of the driving transistor Td; the source of the threshold grabbing transistor T4 is electrically connected with the drain of the driving transistor T0, and the drain of the threshold grabbing transistor T4 is electrically connected with the gate of the driving transistor T0; the source of the light emission controlling transistor T5 is electrically connected to the drain of the driving transistor Td, and the drain of the light emission controlling transistor T5 is electrically connected to the light emitting device 11.

The operation of the pixel circuit shown in fig. 3 and 4 is described below, and the operation of the pixel circuit may include a reset phase, a data voltage writing phase, and a light emitting phase.

In the reset phase, the reset transistor T1 is turned on under the control of the scan line S1 to which its gate is connected transmitting a signal, and the reset signal line VL2 transmits a reset signal, then the reset signal is written to the gate of the driving transistor T0, and the gate of the driving transistor T0 is reset and can store the reset signal with the aid of the storage capacitor.

In the data voltage writing phase, the power voltage writing transistor T2 and the light emitting control transistor T5 are turned off, the data voltage writing transistor T3 is turned on under the control of a transmission signal of the scan line S3 whose gate is electrically connected and the threshold grasping transistor T4 is turned on under the control of a transmission signal of the scan line S4 whose gate is electrically connected, and a data voltage is transmitted on the data signal line DL1, since the potential of the data voltage is higher than that of the reset signal, the driving transistor T0 is turned on and the data voltage is written into the gate of the driving transistor T0.

In the light emitting stage, the data voltage writing transistor T3 and the threshold grabbing transistor T4 are turned off, the power voltage writing transistor T2 is turned on under the control of the transmission signal of the scan line S2 electrically connected to the gate thereof and the light emitting control transistor T5 is turned on under the control of the transmission signal of the scan line S5 electrically connected to the gate thereof, the power voltage line VL1 transmits the power voltage, the power voltage is transmitted to the source of the driving transistor T0, the potential of the power voltage is greater than that of the data voltage, and the light emitting driving transistor Td generates the light emitting driving current and transmits the light emitting driving current to the electrically connected light emitting device 11 through the output terminal 200 of the pixel circuit 20.

It should be noted that the plurality of pixel circuits 20 in the pixel circuit group 02 of the present application may have the same circuit structure, for example, the first pixel circuit 21 and the second pixel circuit 22 may have the same circuit structure. In addition, as shown in fig. 3 and 4, the driving transistor T0 in the pixel circuit 20 is specifically a first driving transistor T01 in the first pixel circuit 21, a second driving transistor T02 in the second pixel circuit 22, and the output terminal 200 in the pixel circuit 20 is specifically a first output terminal 210 in the first pixel circuit 21 and a second output terminal 220 in the second pixel circuit 22.

Fig. 3 and 4 only illustrate one equivalent circuit diagram of the pixel circuit 20, and the specific circuit structure of the pixel circuit 20 in the present application may be in other forms.

Referring to fig. 1-3, in a plane perpendicular to the thickness direction of the display panel, the second light emitting device 112 at least partially overlaps the corresponding second pixel circuit 22, and the first light emitting device 112 has a first displacement relative to the corresponding first driving transistor T01

For example, as illustrated in fig. 2, there is a first displacement between the center of the first light emitting device 112 and the center of the corresponding electrically connected first driving transistor T01

In addition, the first output terminal 210 of the first pixel circuit 21 has a second displacement with respect to the corresponding first driving transistor T01 in a plane perpendicular to the thickness direction of the display panel

Second output 220 of second pixel circuit 21 with respect to the second driveThe transistor T02 has a third displacement

For example, as illustrated in fig. 2, in the first pixel circuit 21, the displacement from the midpoint of the first driving transistor T01 to the midpoint of the first output terminal 210 is the second displacement

In the same second pixel circuit 22, the displacement from the midpoint of the second driving transistor T02 to the midpoint of the second output terminal 220 is a third displacement

In the embodiment of the present application, the first displacement

Second displacement

And a third displacement

Are represented with the driving transistor T0 in the corresponding pixel circuit 20 as a starting point, and it should be noted that this is based on the coordinate coincidence in the vertical direction of the driving transistors T0 in the pixel circuits 20 of the same row, and the coordinate coincidence in the horizontal direction of the driving transistors T0 in the pixel circuits 20 of the same column. As can be appreciated, the first displacement

Second displacement

And a third displacement

It can also be represented with other reference points in the corresponding pixel circuit as starting points, but with different pixels in the same row electricallyThe coordinates of the reference point in the way 20 in the vertical direction should also coincide, and the coordinates of the reference point in the different pixel circuits 20 in the same column in the horizontal direction should also coincide.

Wherein the fourth bit shift

First displacement

And the fourth shift

The included angle therebetween is less than 90 deg.. That is, the second displacement

Relative to the third displacement

Toward the first displacement

Is moved. That is, in the first pixel circuit 21 and the second pixel circuit 22, the position of the first output terminal 210 in the first pixel circuit 21 with respect to the first driving transistor T01 and the position of the first output terminal 220 in the second pixel circuit 22 with respect to the second driving transistor T02 are changed, and the changes are shifted in the direction in which the corresponding electrically connected first light emitting device 111 is located.

In the embodiment of the present application, the position of the first output end 210 is moved to the direction of the first light emitting device 111 electrically connected to the first output end, so that the length of the connection line between the first output end 210 and the first light emitting device 111 electrically connected to the first output end can be reduced, the light shielding area in the display panel can be reduced, and the light transmittance of the display panel can be improved.

For example, as illustrated in fig. 1, when the position of the first output terminal 210 in the first pixel circuit coincides with the positions of the output terminals of the other pixel circuits in the other pixel circuits, the connection line between the first output terminal 210 and the first light emitting device 111 to which it is electrically connected is a connection line 121 b'; when the first output end 210 is close to the first light emitting device 111 electrically connected thereto, the connection line between the first output end 210 and the first light emitting device 111 electrically connected thereto is the first connection line 121 b. It can be obviously seen that the length of the first connection line 121b is obviously reduced relative to the length of the connection line 121 b', so that the shielding area of the connection line between the first output end 210 and the first light emitting device 111 electrically connected thereto for light is reduced, and further, the light transmittance of the display panel can be improved.

In addition, since the first light emitting device 111 is apart from the corresponding electrically connected first pixel circuit 21, the first light emitting device 111 needs to be electrically connected to the output terminal 210 of the first pixel circuit 21 through the first connection line 121 b. Referring to fig. 3, when the output end 210 of the first pixel circuit 21 moves in the direction of the first light emitting device 111 electrically connected thereto, the light-transmitting area of the light-transmitting region Q is significantly increased, and in the prior art, the light-transmitting region Q is shielded by the first connecting line 121b to have a larger area, which affects the light transmittance. Therefore, the light transmittance of the display panel can be significantly improved by reducing the light-shielding area of the light-transmitting region Q according to the embodiment of the present disclosure.

FIG. 5 is a schematic diagram of a display panel according to an embodiment of the present application; fig. 6 is a schematic view of another display panel provided in an embodiment of the present application.

In one embodiment of the present application, as shown in fig. 5 and 6, the display panel includes a regular display area AA and a functional display area BB, and the light transmittance of the functional display area BB is greater than that of the regular display area AA. The light emitting device group 01 and the pixel circuit group 02 are disposed in the functional display area BB.

The area where the functional display area 02 is located is used for setting optical functional elements, the conventional display area AA can perform light emitting display, and the functional display area BB can realize the light emitting display function together with the conventional display area AA, and can also realize an optical signal transmission function, such as at least one of functions of photographing, biometric feature recognition, illumination, and the like.

The functional display area BB may have a rectangular shape as shown in fig. 5 and 6, or may have other shapes such as an oval shape and a circular shape, and the present application is not limited thereto.

In addition, the functional display area BB may be completely surrounded by the normal display area AA as shown in fig. 5, or may be half-surrounded by the normal display area AA as shown in fig. 6.

In the pixel circuit group, the first output end 210 of the first pixel circuit 21 is shifted toward the direction of the electrically connected first light emitting device 111, so that the length of the connecting line between the first output end 210 and the electrically connected first light emitting device 111 can be reduced, the light shielding area of the functional display area BB can be reduced, the light transmittance of the functional display area BB can be improved, and the reliability of the optical function element in the area where the functional display area BB is located can be ensured.

Further, the density and/or size of the sub-pixels in the functional display area BB may be smaller than the density and/or size of the sub-pixels in the conventional display area AA, so as to further ensure that the light transmittance of the functional display area BB is greater than that of the conventional display area AA.

In one embodiment of the present application, as shown in fig. 1, a plurality of pixel circuit groups 02 are arranged along a first direction X and a second direction Y, and the pixel circuits 20 in the pixel circuit groups 02 are arranged along the first direction X, which is perpendicular to the second direction Y; the pixel circuits 20 in the display panel are arranged in a first direction X and a second direction Y.

The first pixel circuit 21 is separated from the first light emitting device 112 in a plane perpendicular to the thickness direction of the display panel, and the light emitting device group 01 further includes a first connection portion 121, the first light emitting device 111 is connected to the first connection portion 121 and electrically connected to the first output end 21 through the first connection portion 121, that is, the first light emitting device 111 is electrically connected to the corresponding first output end 210 with the first connection portion 121 therebetween.

The light transmittance of at least a region of the display panel is improved by changing the position of the output end 200 in a part of the pixel circuit 20, shortening the distance between the electrically connected light-emitting device 11 and the pixel circuit 20 which are separated in a plane perpendicular to the thickness direction of the display panel.

Further, referring to fig. 1 and fig. 2, the pixel circuits 20 in the pixel circuit group 02 include a first pixel circuit 21, a second pixel circuit 22 and a third pixel circuit 23; the plurality of light emitting devices 11 in the light emitting device group 01 include a first light emitting device 111, a second light emitting device 112, and a third light emitting device 113, and the first light emitting device 111 is electrically connected to the first pixel circuit 21, the second light emitting device 112 is electrically connected to the second pixel circuit 22, and the third light emitting device 113 is electrically connected to the third pixel circuit 23.

As shown in fig. 1 and fig. 2, in the same light emitting device group 01, the first light emitting device 111 and the second light emitting device 112 are arranged along the second direction Y, and along the second direction Y, the third light emitting device 113 is located at one side of the first light emitting device (111) and the second light emitting device 112. That is, as shown in fig. 2, in the pixel circuit group 02 and the light emitting device group 01 which are correspondingly arranged, the first pixel circuit 21, the second pixel circuit 22 and the third pixel circuit 23 are linearly arranged, and the first light emitting device 111, the second light emitting device 112 and the third light emitting device 113 are arranged in a shape of a Chinese character pin, so that rendering is facilitated and resolution is improved.

Also, as shown in fig. 2, in the pixel circuit group 02 and the light emitting device group 01 which are provided correspondingly, the first light emitting device 111 is separated from the first pixel circuit 21, the second light emitting device 112 is at least partially overlapped with the second pixel circuit 22, and the third light emitting device 113 is at least partially overlapped with the third pixel circuit 23 in a plane perpendicular to the thickness direction of the display panel. The output terminal 200 of the third pixel circuit 23 may not be specially designed with respect to the output terminal 200 of the second pixel circuit 22, that is, the coordinates of the output terminal 200 of the third pixel circuit 23 located in the same row in the column direction substantially coincide with the coordinates of the output terminal 200 of the second pixel circuit 22 in the column direction, and the coordinates of the output terminal of the third pixel circuit 23 located in the same column in the row direction substantially coincide with the coordinates of the output terminal of the second pixel circuit 22 in the row direction.

Note that one of the first light emitting device 111, the second light emitting device 112, and the third light emitting device 113 may emit red light, one may emit green light, and the other may emit blue light.

In one solution, the positional relationship between the light emitting device 11 emitting green light and the electrically connected pixel circuit 20 is such that the light emitting device 11 emitting green light is closer to the output terminal 200 of the pixel circuit 20 to which it is electrically connected, relative to the positional relationship between the light emitting device 11 emitting blue light and the electrically connected pixel circuit 20; the position relationship between the light emitting device 11 emitting red light and the electrically connected pixel circuit 20 may be adaptively adjusted with respect to the position relationship between the light emitting device 11 emitting blue light and the electrically connected pixel circuit 20, and the position of the light emitting device 11 emitting red light and the output terminal 200 of the electrically connected pixel circuit 20 may be adaptively adjusted.

In addition, the first light emitting device 111 may emit green light, the second light emitting device 112 may emit red light, and the third light emitting device 113 may emit blue light.

Fig. 7 is a partial cross-sectional view of a display panel according to an embodiment of the present disclosure, and fig. 8 is a partial cross-sectional view of another display panel according to an embodiment of the present disclosure.

As shown in fig. 7 and 8, the first light emitting device 111 includes a first electrode 1111, a second electrode 1112, and a light emitting layer 1113 between the first electrode 1111 and the second electrode 1112, wherein the light emitting layer 1113 may be specifically an organic light emitting layer.

In an embodiment of the present application, please refer to fig. 1, fig. 7 and fig. 8, when the first light emitting device 111 is electrically connected to the first output end 210 of the corresponding first pixel circuit 21 through the first connection portion 121, specifically, the first electrode 1111 of the first light emitting device 111 is connected to the first connection portion 121 and is electrically connected to the first output end 21 through the first connection portion 121.

Referring to fig. 7 and 8, the first electrode 1111 includes a metal electrode 012 and a transparent conductive electrode 011 stacked along a thickness direction of the display panel. For example, as shown in fig. 7 and 8, the first electrode includes two layers of transparent conductive electrodes 011 and a metal electrode 012, and the metal electrode 012 is located between the two layers of transparent conductive electrodes 011.

Referring to fig. 7 and 8, the first connection portion 121 includes a transparent conductive electrode 021 and at least a partial region thereof does not include a metal electrode. In the electrically connected first connection portion 121 and the first electrode 1111, the transparent conductive electrode 021 in the first connection portion 121 and the transparent conductive electrode in the first electrode 111 may be an integrated structure. That is, the portion of the same transparent conductive electrode in the region of the first connection portion 121 is the transparent conductive electrode 021, and the portion of the same transparent conductive electrode in the region of the first electrode 1111 is the transparent conductive electrode 011. For example, as shown in fig. 7 and 8, the first connection portion 121 is formed only by the transparent conductive electrode 021, and does not include a metal electrode.

In the present embodiment, by not providing a metal electrode in the first connection portion 121, the light transmittance of the first connection portion 121 is increased, and the light transmittance of the connection region between the first light emitting device 111 and the corresponding electrically connected first pixel circuit 21 is further improved.

In the embodiment of the present application, as shown in fig. 7 and 8 in combination, the insulating layer 003 is included between the film layer where the light emitting device 11 is located and the film layer where the pixel circuit 20 is located. That is, in the thickness direction of the display panel, the insulating layer 003 is included between the first light emitting device 111 and the first pixel circuit 21, the insulating layer 003 is included between the second light emitting device 112 and the second pixel circuit 22, and the insulating layer 003 is included between the third light emitting device 113 and the third pixel circuit 23.

Also, the insulating layer 003 includes via holes, and the light emitting devices 11 are electrically connected to the corresponding pixel circuits 20 through the via holes. That is, the insulating layer 003 includes a first via hole and the first light emitting device 111 is electrically connected to the corresponding first pixel circuit 21 through the first via hole, the insulating layer 003 includes a second via hole and the second light emitting device 112 is electrically connected to the corresponding second pixel circuit 22 through the second via hole, the insulating layer includes a third via hole and the third light emitting device 113 is electrically connected to the corresponding third pixel circuit 23 through the third via hole.

Further, the first connection portion 121 includes a first via portion 121a, the first via portion 121a is disposed in the first via, and one end of the first via portion 121a is connected to the first pixel circuit 111.

In addition, the light emitting device group 01 may further include a second connection portion 122 and a third connection portion 123.

Referring to fig. 1, since the second light emitting device 112 and the corresponding second pixel circuit 22 are at least partially overlapped, the second light emitting device 112 can be directly electrically connected to the second pixel circuit 22 through the second via portion 122 located in the second via, and one end of the second via portion 122 is connected to the second light emitting device 112 and the other end is connected to the second pixel circuit 22.

With continued reference to fig. 1, since the third light emitting device 113 and the corresponding third pixel circuit 23 at least partially overlap, the third light emitting device 113 may be electrically connected to the third pixel circuit 23 directly through the third via portion 123 located in the third via, and one end of the third via portion 123 is connected to the third light emitting device 113 and the other end is connected to the third pixel circuit 23.

In one implementation of the present embodiment, as shown in fig. 8, the first connection portion 121 includes only the first through hole portion 123. That is, according to the inventive concept of the present application, the distance between the adjacent first light emitting devices 111 and the corresponding electrically connected first output terminals 210 is set to be the minimum within a level that the process can reach, thereby reducing the influence of shielding the first connection parts 121 from light as much as possible.

In another implementation manner of the present embodiment, as shown in fig. 7, the first connection portion 121a further includes a first connection line 121b, and the first connection line 121b is located between the first through hole portion 121a and the first electrode 1111. In the present implementation, the first connection lines 121b do not overlap the metal electrodes 012 in the thickness direction of the display panel.

Referring to fig. 1, the position shown by 121a ' is a position of the first through hole portion when the inventive concept of the present application is not applied, and the position shown by 121b ' is a design of the first connection line when the inventive concept of the present application is not applied, as is apparent from fig. 1, when the display panel in the present application moves the position of the first output end 210 toward the direction of the light emitting device 111 electrically connected thereto, the length of the first connection line 121b ' is significantly reduced when the position of the first output end 210 is unchanged (i.e., the position of the first through hole portion is not changed), and thus the light-shielding area of the first connection line 121b for light is reduced, and further the light transmittance of the display panel can be improved. In addition, the position of the first connecting line 121b is located in a region just outside the pixel circuit 20, that is, a main light-transmitting region of the display panel, and by reducing the light-shielding area at the position, the light transmittance of the display panel can be significantly improved.

In both of the above implementations, the first via part 121a may not overlap the metal electrode 012 in the thickness direction of the display panel.

Fig. 9 is a partial cross-sectional view of another display panel according to an embodiment of the present application.

As shown in fig. 9, the insulating layer 003 between the film layer where the light emitting device 11 is located and the film layer where the pixel circuit 20 is located includes the first sub-insulating layer 31 and the second sub-insulating layer 32, and the first sub-insulating layer 31 is closer to the light emitting device 11 than the second sub-insulating layer 32. The first and second sub-insulation layers 31 and 32 each include a via therein, wherein the via in the first sub-insulation layer 31 may include a first via, a second via, and a third via.

In addition, when the first and second sub-insulating layers 31 and 32 are included, a connection electrode 004 may be further included between the first and second sub-insulating layers 31 and 32. The first via part 121 in the first connection part 121 may be located in a via hole in the first sub-insulating layer 31, and one end of the connection electrode 004 located between the first light emitting device 111 and the first pixel circuit 21 is connected to the first connection part 121, and the other end is electrically connected to the corresponding first pixel circuit 21 through a via hole of the second sub-insulating layer 32.

Correspondingly, one end of the connection electrode 004 between the second light emitting device 112 and the second pixel circuit 22 is connected to the second connection portion 122, and the other end is electrically connected to the corresponding second pixel circuit 22 through the via hole of the second sub-insulating layer 32; one end of the connection electrode 004 between the third light emitting device 113 and the third pixel circuit 23 is connected to the third connection part 123, and the other end is electrically connected to the corresponding third pixel circuit 23 through the via hole of the second sub-insulating layer 32.

At this time, when the projections of the via hole in the first sub-insulating layer 31 and the via hole in the second sub-insulating layer 32 in the plane perpendicular to the thickness direction of the display panel are misaligned between the corresponding electrically connected light emitting device 11 and the pixel circuit 20, the portion of the connection electrode 004 connected to the first connection portion 121 is used as the first output end 210 of the first pixel circuit 21. Correspondingly, the portion of the connection electrode 004 connected to the second connection portion 122 serves as the second output terminal 220 of the second pixel circuit 22, and the portion of the connection electrode 004 connected to the third connection portion 123 serves as the output terminal of the third pixel circuit 23.

As shown in fig. 10, a display device includes the display panel 0001 provided in any one of the above embodiments. The display device provided by the embodiment of the application can be a mobile phone, and in addition, the display device provided by the embodiment of the application can also be a computer, a television and other display devices.

As shown in fig. 10, the display panel provided in the embodiment of the present application further includes an optical functional element 0002, the display panel includes a regular display area AA and a functional display area BB, and a light transmittance of the functional display area BB is greater than a light transmittance of the regular display area AA; the light emitting device group 01 and the pixel circuit group 02 are arranged in the light-transmitting display area BB; and the optical functional element 0002 is disposed at a position of the display device corresponding to the functional region display region BB of the display panel 0001. Wherein, the optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera and a flashlight.

In this embodiment of the application, by moving the position of the first output end 210 to the direction of the first light emitting device 111 electrically connected to the first output end, the length of the connection line between the first output end 210 and the first light emitting device 111 electrically connected to the first output end can be reduced, so that the light shielding area in the display device can be reduced, and the light transmittance of the display device can be improved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, comprising:

a plurality of light emitting device groups including a plurality of light emitting devices therein; the plurality of light emitting devices includes at least a first light emitting device and a second light emitting device;

the pixel circuit groups comprise a plurality of pixel circuits, and the light emitting device groups and the pixel circuit groups are arranged in a one-to-one correspondence manner; the plurality of pixel circuits at least comprise a first pixel circuit and a second pixel circuit, the first pixel circuit comprises a first driving transistor and a first output end, and the second pixel circuit comprises a second driving transistor and a second output end;

wherein, in the correspondingly arranged light emitting device group and the pixel circuit group, the first light emitting device is correspondingly and electrically connected with the first output end of the first pixel circuit, and the second light emitting device is correspondingly and electrically connected with the second output end of the second pixel circuit;

the second light emitting devices at least partially overlap the corresponding second pixel circuits in a plane perpendicular to the thickness direction of the display panel, and the first light emitting devices have a first displacement with respect to the corresponding first driving transistors

The first output end has a second displacement relative to the corresponding first drive transistor

The second output end has a third displacement relative to the second drive transistor

The fourth bit shift

First displacement

And the fourth shift

The included angle therebetween is less than 90 deg..

2. The display panel according to claim 1, wherein the plurality of pixel circuit groups are arranged in a first direction and a second direction, and the pixel circuits in the pixel circuit groups are arranged in the first direction, the first direction being perpendicular to the second direction;

the first pixel circuit is separated from the first light emitting device in a plane perpendicular to a thickness direction of the display panel.

3. The display panel according to claim 2, wherein the plurality of pixel circuits in the pixel circuit group includes a first pixel circuit, a second pixel circuit, and a third pixel circuit;

the plurality of light emitting devices in the light emitting device group include a first light emitting device, a second light emitting device, and a third light emitting device electrically connected to the third pixel circuit;

in the same light emitting device group, the first light emitting device and the second light emitting device are arranged along a second direction, and the third light emitting device is positioned on one side of the first light emitting device and the second light emitting device along the second direction;

the third light emitting device and the third pixel circuit at least partially overlap in a plane perpendicular to a thickness direction of the display panel in the pixel circuit group and the light emitting device group which are disposed correspondingly.

4. The display panel according to claim 1, wherein the display panel comprises a normal display region and a functional display region, and a light transmittance of the functional display region is greater than a light transmittance of the normal display region;

wherein the light emitting device group and the pixel circuit group are disposed in the functional display area.

5. The display panel according to claim 1, wherein the light-emitting device group further includes a first connection portion, and the first light-emitting device includes a first electrode connected to the first connection portion and electrically connected to the first output terminal through the first connection portion;

the first electrode includes a metal electrode and a transparent conductive electrode which are stacked in a thickness direction of the display panel, and the first connection portion includes the transparent conductive electrode and at least a partial region thereof does not include the metal electrode.

6. The display panel according to claim 5, wherein an insulating layer is included between the first light emitting device and the first pixel circuit in a thickness direction of the display panel, the insulating layer including a first via hole;

the first connecting portion includes a first via portion, the first via portion is disposed in the first via, and one end of the first via portion is connected to the first pixel circuit.

7. The display panel according to claim 6, wherein the first via portion has no overlap with the metal electrode in a thickness direction of the display panel.

8. The display panel according to claim 6, wherein the first connection portion further comprises a first connection line between the first via portion and the first electrode;

the first connecting line and the metal electrode are not overlapped along the thickness direction of the display panel.

9. The display panel according to claim 5, wherein the light emitting device group further includes a second connection portion through which the second light emitting device is electrically connected to the second output terminal;

the insulating layer further comprises a second through hole, and the second connecting portion is located in the second through hole.

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

11. The display device according to claim 10, wherein the display panel further comprises an optical function element;

the display panel comprises a conventional display area and a functional display area, and the light transmittance of the functional display area is greater than that of the conventional display area; the light-emitting device group and the pixel circuit group are arranged in the light-transmitting display area;

the optical functional element is arranged at a position of the display device corresponding to the functional display area, and the optical functional element is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera and a flashlight.