CN110890026A

CN110890026A - Display panel and display device

Info

Publication number: CN110890026A
Application number: CN201911234351.8A
Authority: CN
Inventors: 许传志; 谢正芳; 常苗
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-03-17
Anticipated expiration: 2039-12-05
Also published as: CN110890026B

Abstract

The invention discloses a display panel and a display device. The display panel is provided with a first display area and a second display area, the first display area comprises a central area and an edge area adjacent to the central area, the light transmittance of the first display area is greater than that of the second display area, the display panel comprises first sub-pixels, and a plurality of first sub-pixels are located in the first display area; the first pixel circuit is positioned in the second display area, connected with the first sub-pixel of the edge area through the first routing, connected with the first sub-pixel of the central area through the second routing, and used for driving the first sub-pixel to display; the width of the first wire is smaller than that of the second wire. According to the display panel provided by the embodiment of the invention, the pixel density of the first display area can be improved, and the display effect is improved.

Description

Display panel and display device

Technical Field

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

Background

With the rapid development of electronic devices, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more in the industry.

Conventional electronic devices such as mobile phones, tablet computers, etc. need to integrate components such as front-facing cameras, earphones, infrared sensing elements, etc. In the prior art, a groove (Notch) or an opening may be formed in the display screen, and external light may enter the photosensitive element located below the screen through the groove or the opening. However, these electronic devices are not all full-screen in the true sense, and cannot display in each area of the whole screen, for example, the corresponding area of the front camera cannot display the picture.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, which can realize that at least part of the area of the display panel is light-permeable and can display, and are convenient for the under-screen integration of a photosensitive assembly.

In one aspect, an embodiment of the present invention provides a display panel, which has a first display area and a second display area, wherein the first display area includes a central area and an edge area adjacent to the central area, and a light transmittance of the first display area is greater than a light transmittance of the second display area, and the display panel includes:

the first sub-pixels are positioned in the first display area;

the first pixel circuit is positioned in the second display area, connected with the first sub-pixel of the edge area through the first routing, connected with the first sub-pixel of the central area through the second routing, and used for driving the first sub-pixel to display;

the width of the first wire is smaller than that of the second wire.

In a possible implementation manner of the first aspect, the first trace is a metal trace, and the second trace is a transparent trace;

preferably, the first wire is any one of a copper film wire, an aluminum film wire, a molybdenum film wire or a titanium aluminum titanium composite film wire;

preferably, the second wire includes any one of an indium tin oxide film wire and an indium zinc oxide film wire.

In a possible implementation manner of the first aspect, the width of the first trace is less than or equal to 4 μm.

In a possible implementation manner of the first aspect, the display panel further includes:

a substrate;

the device layer is positioned on the substrate and comprises a plurality of metal layers which are insulated from each other;

the first wire is located on the second metal layer of the device layer, and the second lead is located on the third metal layer of the device layer.

In a possible implementation manner of the first aspect, the first display area includes a plurality of repeating units, each repeating unit includes at least two pixels, each pixel includes at least three colors of first sub-pixels, and each first sub-pixel includes a first electrode, a light emitting structure, and a second electrode that are sequentially stacked;

the first electrodes of the adjacent first sub-pixels with the same color in the repeating unit are electrically connected through an interconnection structure to form a same-color pixel group;

the first pixel circuit is connected with the interconnection structure in the same-color pixel group through the first wire and the second wire, and the first wire is connected between the first pixel circuit and the interconnection structure in a shortest distance connection mode.

In a possible implementation manner of the first aspect, the pixel includes a first sub-pixel of three colors, and the corresponding same-color pixel group has a first same-color pixel group of the first color, a second same-color pixel group of the second color, and a third same-color pixel group of the third color, where orthographic projections of the interconnection structures of the first same-color pixel group and the interconnection structures of the second same-color pixel group in a direction perpendicular to the display panel do not intersect;

further, the interconnection structure of the third homochromatic pixel group intersects with the interconnection structure of the first homochromatic pixel group and/or the interconnection structure of the second homochromatic pixel group in the orthographic projection in the direction perpendicular to the display panel;

and the interconnection structure of the same-color pixel group with at least one color in the central area is a transparent conductive structure.

In a possible implementation manner of the first aspect, the central region, the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group are transparent conductive structures disposed below the first electrode, and the interconnection structure of the third homochromatic pixel group is different from the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group in different layers;

the interconnection structure of the third homochromatic pixel group is arranged with the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group in different layers;

furthermore, the material of the edge area, the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group is the same as that of the first electrode, or the interconnection structures are transparent conductive structures; and/or the presence of a gas in the gas,

the first same-color pixel group in the central area and the second wiring corresponding to the second same-color pixel group are transparent wirings which are arranged in the same layer with the interconnection structure of the first same-color pixel group and the interconnection structure of the second same-color pixel group in the central area.

In one possible implementation manner of the first aspect, the second display area includes a first sub-display area and a second sub-display area adjacent to the first sub-display area and the first display area, and the first pixel circuit is disposed in the second sub-display area;

a plurality of second sub-pixels located in the second sub-display regions;

a plurality of third sub-pixels located in the first sub-display region;

preferably, the circuit structure of the first pixel circuit is any one of a 1T circuit, a 2T1C circuit, a 3T1C circuit, a 6T1C circuit, a 6T2C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit;

preferably, the size of the second sub-pixel is the same as the size of a third sub-pixel of the same color;

preferably, the size of the first sub-pixel is smaller than the size of the third sub-pixel of the same color.

In one possible implementation manner of the first aspect, the first sub-pixel includes a first electrode, a light emitting structure, and a second electrode that are sequentially stacked;

preferably, the projection of the light-emitting structure in the direction perpendicular to the display panel is composed of one first graphic unit or is composed of more than two first graphic units in a splicing manner, and the first graphic unit comprises at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd and a rectangle;

preferably, the projection of the first electrode in the direction perpendicular to the display panel is composed of one second graphic unit or is composed of more than two second graphic units in a splicing manner, and the second graphic unit comprises at least one selected from the group consisting of a circle, an ellipse, a dumbbell shape, a gourd shape and a rectangle;

preferably, the first electrode of the first display region is a light-transmitting electrode;

preferably, the first electrode of the first display region is a reflective electrode;

preferably, the first electrode of the first display region includes an indium tin oxide layer or an indium zinc oxide layer;

preferably, the second electrode of the first display region includes a magnesium silver alloy layer.

In another aspect, an embodiment of the present invention provides a display device, which includes the display panel of any one of the foregoing embodiments.

According to the display panel provided by the embodiment of the invention, the light transmittance of the first display area is greater than that of the second display area, so that the display panel can integrate the photosensitive assembly on the back surface of the first display area, the screen-under integration of the photosensitive assembly such as a camera is realized, meanwhile, the first display area can display pictures, the display area of the display panel is increased, and the comprehensive screen design of the display device is realized.

According to the display panel provided by the embodiment of the invention, the first pixel circuit for driving the first sub-pixel to display is positioned in the second display area, so that the wiring structure in the first display area is reduced, and the light transmittance of the first display area is improved. The width of the first routing line of the first sub-pixel connected with the edge area is smaller than the width of the second routing line of the first sub-pixel connected with the central area, more routing lines can be arranged in the limited space of the first display area, and then more first sub-Pixels can be arranged in the first display area, so that the pixel density (Pixels Per Inch, PPI) of the first display area is improved, and the display effect is improved.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

FIG. 1 illustrates a schematic top view of a display panel provided in accordance with an embodiment of the invention;

FIG. 2 shows an enlarged partial view of the area Q of FIG. 1, provided by way of example;

FIG. 3 shows a cross-sectional view taken along line A-A of FIG. 2 according to a first exemplary embodiment;

FIG. 4 shows a cross-sectional view taken along line B-B of FIG. 2 according to a first exemplary embodiment;

FIG. 5 illustrates a schematic top view of a display device provided in accordance with an embodiment of the invention;

fig. 6 shows an exemplary cross-sectional view in the direction C-C of fig. 5.

Description of reference numerals:

AA 1-first display area; AA 11-central region; AA 12-edge area;

AA 2-second display area; AA 21-first sub-display; AA 22-second sub-display area;

NA-non-display area;

10-a repeat unit; 110-pixels;

01-first group of monochromatic pixels; 02-a second same-color pixel group; 03-a third same-color pixel group;

101. 102, 103-first sub-pixel;

201. 202, 203-interconnect structures;

120-a first pixel circuit; 121-a drain electrode; 122-source; 123-grid electrode; 421-a semiconductor layer;

l1 — first trace; l2 — second trace;

111-a light emitting structure; 112-a first electrode; 113-a second electrode;

30-a substrate; 40-a device layer; 41-a buffer layer; 42-a first insulating layer; 43-a second insulating layer; 44-interlayer dielectric layer; 45-a planarization layer;

50-pixel definition layer.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

On electronic devices such as mobile phones and tablet computers, it is necessary to integrate a photosensitive component such as a front camera, an infrared light sensor, a proximity light sensor, and the like on the side where the display panel is provided. In some embodiments, a transparent display area may be disposed on the electronic device, and the photosensitive component is disposed on the back of the transparent display area, so that full-screen display of the electronic device is achieved under the condition that the photosensitive component is ensured to work normally.

In order to improve the light transmittance of the light-transmitting display area, the pixel driving circuit corresponding to the sub-pixels of the light-transmitting display area is often disposed in the main display area, and the pixel driving circuit is connected to the sub-pixels of the light-transmitting display area by transparent wires. However, under the influence of the current process, the thin transparent traces cannot be fabricated, so that the transparent display area has insufficient space for disposing more sub-pixels and more traces.

In order to solve the above problems, embodiments of the present invention provide a display panel and a display device, and the following describes embodiments of the display panel and the display device with reference to the accompanying drawings.

Embodiments of the present invention provide a display panel, which may be an Organic Light Emitting Diode (OLED) display panel.

Fig. 1 illustrates a schematic top view of a display panel provided according to an embodiment of the present invention, and fig. 2 illustrates an exemplary enlarged view of a portion of a Q region in fig. 1.

As shown in fig. 1, the display panel 100 has a first display area AA1, a second display area AA2, and a non-display area NA surrounding the first display area AA1 and the second display area AA2, and the light transmittance of the first display area AA1 is greater than that of the second display area AA 2.

Herein, it is preferable that the light transmittance of the first display area AA1 is 15% or more. In order to ensure that the light transmittance of the first display area AA1 is greater than 15%, even greater than 40%, or even higher, the light transmittance of each functional film layer of the display panel 100 in this embodiment is greater than 80%, and even at least some of the functional film layers are greater than 90%.

According to the display panel 100 of the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate a photosensitive component on the back of the first display area AA1, and realize the under-screen integration of the photosensitive component such as a camera, and meanwhile, the first display area AA1 can display a picture, so that the display area of the display panel 100 is increased, and the full-screen design of the display device is realized.

The first display area AA1 includes a central area AA11 and an edge area AA12 adjacent to the central area AA 11. The light transmittance of the central area AA11 of the rear integrated photosensitive member of the first display area AA1 is required to be higher than that of the edge area AA 12. The particular location, shape and size of the central area AA11 may be set according to the particular location of the photosensitive assembly.

As shown in fig. 2, the display panel 100 includes first sub-pixels 101, 102, 103 and a first pixel circuit 120. The plurality of first sub-pixels 101, 102, 103 are located in the first display area AA1, and the plurality of first pixel circuits 120 are located in the second display area AA 2. The first pixel circuit 120 is connected to the

first sub-pixels

101, 102, and 103 of the edge area AA12 through the first routing line L1, the first pixel circuit 120 is connected to the

first sub-pixels

101, 102, and 103 of the central area AA11 through the second routing line L2, and the first pixel circuit 120 is configured to drive the

first sub-pixels

101, 102, and 103 to emit light for display. The width of the first track L1 is smaller than the width of the second track L2.

According to the display panel 100 of the embodiment of the invention, the first pixel circuit 120 for driving the

first sub-pixels

101, 102, and 103 to display is located in the second display area AA2, so that the wiring structure in the first display area AA1 is reduced, and the light transmittance of the first display area AA1 is improved. The width of the first wire L1 connecting the

first sub-pixels

101, 102, 103 of the edge area AA12 is smaller than the width of the second wire connecting the

first sub-pixels

101, 102, 103 of the central area AA11, so that more wires can be disposed in the limited space of the first display area AA1, and further more

first sub-pixels

101, 102, 103 can be disposed in the first display area AA1, thereby improving the PPI of the first display area AA1 and improving the display effect. In addition, under the condition that the PPI of the first display area AA1 is kept unchanged, the area of the first display area AA1 can be set to be larger, so that the wide-angle camera is integrated on the back of the first display area AA1, and the requirement of the wide-angle camera for a transparent area with a larger area is met.

In some embodiments, the first trace L1 is a metal trace, and the second trace L2 is a transparent trace. Generally, the requirement on the light transmittance of the central area AA11 is higher than that of the edge area AA12, the edge area AA12 adopts non-transparent but thinner metal wires, and the central area AA11 adopts transparent wires, so that the process difficulty can be reduced without affecting the light transmittance of the first display area AA 1.

In some embodiments, the first trace L1 includes any one of a copper film trace, an aluminum film trace, a molybdenum film trace, or a titanium aluminum titanium composite film trace.

In some embodiments, the second trace L2 includes any one of an indium tin oxide (ito) film trace and an indium zinc oxide (izo) film trace.

In some embodiments, the width of the first trace L1 is less than or equal to 4 μm. Therefore, more routing wires can be further arranged in the limited space of the first display area AA1, and then more

first sub-pixels

101, 102 and 103 can be arranged in the first display area AA1, so that the PPI of the first display area AA1 is further improved, and the display effect is improved. In addition, under the condition that the PPI of the first display area AA1 is kept unchanged, the area of the first display area AA1 can be further set to be larger, so that the wide-angle camera is integrated on the back of the first display area AA1, and the requirement of the wide-angle camera for a transparent area with a larger area is met.

In some embodiments, the first trace L1 and/or the second trace L2 are curved, so that the diffraction phenomenon in the first display area AA1 can be reduced, and the display effect can be improved.

In some embodiments, as shown in FIG. 3, display panel 100 includes substrate 30 and device layer 40. A device layer 40 is located over the substrate 30. Illustratively, the device layer 40 includes a buffer layer 41, a first insulating layer 42, a second insulating layer 43, an interlayer dielectric layer 44, and a planarization layer 45, which are sequentially stacked. Device layer 40 may include multiple metal layers disposed in isolation from one another. For example, a first metal layer may be disposed between the buffer layer 41 and the first insulating layer 42, a second metal layer may be disposed between the first insulating layer 42 and the second insulating layer 43, and a third metal layer may be disposed between the interlayer dielectric layer 44 and the planarization layer 45.

As shown in fig. 3, taking the first pixel circuit 120 as a 1T circuit as an example, the first pixel circuit 120 includes a transistor including a drain electrode 121, a source electrode 122, and a gate electrode 123, the gate electrode 123 is located between the first insulating layer 42 and the second insulating layer 43, and the source electrode 122 and the drain electrode 121 are located on the interlayer dielectric layer 44 and are in contact with the semiconductor layer 421 through the via holes on the first insulating layer 42, the second insulating layer 43, and the interlayer dielectric layer 44.

The

first sub-pixels

101, 102, 103 are located above the planarization layer 45. Each of the

first sub-pixels

101, 102, and 103 includes a first electrode 112, a light-emitting structure 111, and a second electrode 113, which are sequentially stacked. The first trace L1 is located in the second metal layer of the device layer 40 and electrically connected to the first electrodes 112 of the

first sub-pixels

101, 102, 103 of the edge area AA12 through vias. The second trace L2 is located in the third metal layer of the device layer 40 and electrically connected to the first electrode 112 of the

first sub-pixel

101, 102, 103 in the central area AA11 through a via.

According to the embodiment of the invention, an interlayer dielectric layer 44 is arranged between the second metal layer and the third metal layer, so that the second metal layer is insulated from the third metal layer. The first wire L1 is located on the second metal layer of the device layer 40, and the second wire L2 is located on the third metal layer of the device layer 40, so that the first wire L1 and the second wire L2 are insulated without additionally preparing an insulating layer, thereby reducing the process difficulty and the process cost, and avoiding the problem that a via hole with a larger area needs to be prepared when the first wire L1 and the second wire L2 are connected with the first pixel circuit 120. Further, the first trace L1 may be directly under the first electrode 112 without bypassing the first electrode 112.

In some embodiments, with continued reference to fig. 2, the first display area AA1 includes a plurality of repeating units 10, each repeating unit 10 includes at least two pixels 110, each pixel 110 includes at least three colors of first sub-pixels 101, 102, 103, and each

first sub-pixel

101, 102, 103 includes a first electrode 112, a light emitting structure 111, and a second electrode 113 sequentially stacked. The first electrodes 112 of adjacent

first sub-pixels

101, 102, 103 of the same color in the repeating unit 10 are electrically connected by

interconnect structures

201, 202, 203 to form same

color pixel groups

01, 02, 03. In this way, the plurality of first sub-pixels interconnected by the first electrode 112 form a pixel merging structure, and the plurality of first sub-pixels included in the same-color pixel group of one color can be electrically connected to the same first pixel circuit, so that the display of the plurality of interconnected first sub-pixels is controlled by one first pixel circuit, the actual PPI of the first display area AA1 is further reduced, the number of driving wires in the first display area AA1 is reduced, and the light transmittance is improved.

In some embodiments, the first pixel circuit 120 is connected to the interconnection structures in the same-

color pixel groups

01, 02, 03 through the first routing line L1 and the second routing line L2, and the first routing line L1 is connected between the first pixel circuit 120 and the

interconnection structures

201, 202, 203 in the shortest connection manner. That is, the first trace L1 is connected to the

interconnection structures

201, 202, 203 at the position closest to the first pixel circuit 120, so that the length of the first trace L1 can be further reduced, and the influence of the first trace L1 on the light transmittance can be reduced.

In some embodiments, the pixel 110 includes first sub-pixels 101, 102, and 103 of three colors, and the corresponding same-color pixel group has a first same-color pixel group 01 of the first color, a second same-color pixel group 02 of the second color, and a third same-color pixel group 03 of the third color, wherein an orthogonal projection of an interconnection structure of the first same-color pixel group 01 and an interconnection structure of the second same-color pixel group 02 do not intersect in a direction perpendicular to the display panel. Further, the interconnection structure of the third same-color pixel group 03 intersects with the interconnection structure of the first same-color pixel group 01 and/or the interconnection structure of the second same-color pixel group 02 in an orthographic projection perpendicular to the display panel. The interconnect structure of the same-color pixel group of at least one color in the central area AA11 is a transparent conductive structure.

For example, fig. 2 shows that the first homochromatic pixel group 01 includes four first sub-pixels 101 of a first color and three interconnection structures 201, the second homochromatic pixel group 02 includes four first sub-pixels 102 of a second color and three interconnection structures 202, and the third homochromatic pixel group 03 includes four first sub-pixels 103 of a third color and three interconnection structures 203. The interconnection structure of the same-color pixel group of at least one color in the central area AA11 is a transparent conductive structure, which can further improve the light transmittance of the central area AA 11.

In some embodiments, the transparent conductive structure may be made of ITO.

In some embodiments, the pixel density of the first display area AA1 is relatively large, the spacing between the first sub-pixels may be relatively small, and thus there is not enough space for routing. The interconnection structure of the central area AA11 and the edge area AA12 may be set in the following manner.

Fig. 4 shows a cross-sectional view along B-B in fig. 2 provided by the first example. For clarity of illustration of the interconnection structure of the central area AA11 and the edge area AA12, the second lead line L2 is hidden in fig. 4. As shown in fig. 4, in the central area AA11, the interconnection structure of the first homocolor pixel group 01 and the interconnection structure of the second homocolor pixel group 02 are transparent conductive structures disposed under the first electrode 112, and the interconnection structure of the third homocolor pixel group 03 is different from the interconnection structure of the first homocolor pixel group 01 and the interconnection structure of the second homocolor pixel group 02. Illustratively, the interconnection structure 201 of the first homocolor pixel group 01 and the interconnection structure 202 of the second homocolor pixel group 02 are the same layer or different layers disposed below the first electrode 112.

In the edge area AA12, the interconnection structure of the first homochromatic pixel group 01 and the interconnection structure of the second homochromatic pixel group 02 are disposed at the same layer as the first electrode 112, and the interconnection structure of the third homochromatic pixel group 03 is disposed at a different layer from the interconnection structure of the first homochromatic pixel group 01 and the interconnection structure of the second homochromatic pixel group 02.

Further, in the edge area AA12, the interconnection structure of the first homochromatic pixel group 01 and the interconnection structure of the second homochromatic pixel group 02 are made of the same material as the first electrode 112, or are transparent conductive structures; and/or the second trace L2 corresponding to the first homocolor pixel group 01 and the second homocolor pixel group 02 in the central area AA11 is a transparent trace arranged in the same layer as the interconnection structure of the first homocolor pixel group 01 and the interconnection structure of the second homocolor pixel group 02 in the central area AA 11.

The interconnection structures of the same-color pixel groups of two colors in the three colors are arranged to be not intersected in the orthographic projection on the substrate, so that the interconnection structures of the same-color pixel groups of the two colors can be arranged to be in the same layer, and the interconnection structures can be formed in the same process step, thereby reducing the complexity of the preparation process. Furthermore, the interconnection structures with intersecting orthographic projections on the substrate can be arranged in different layers, so that the influence on the normal work of the same-color pixel group when the interconnection structures with intersecting orthographic projections on the substrate are arranged in the same layer can be avoided.

According to the embodiment of the present invention, the central area AA11 and the edge area AA12 are disposed in different manners, and the

interconnection structures

201 and 202 of the edge area AA12 are disposed in the same layer as the first electrode 112, so that a sufficient space can be left below the first electrode 112 of the edge area AA12 for disposing the second trace L2, and when the second trace L2 is disposed in the edge area AA12, the second trace can be directly below the first electrode 112 of the edge area AA12 without bypassing the first electrode 112.

In some embodiments, the interconnection structure 201 of the first homochromatic pixel group 01 and the interconnection structure 202 of the second homochromatic pixel group 02 in the edge area AA12 are both made of the same material as the first electrode 112, and the

interconnection structures

201 and 202 of the edge area AA12 and the first electrode 112 can be formed in the same process step, so that the complexity of the manufacturing process can be reduced.

In some embodiments, as shown in fig. 4, the display panel includes a substrate 30, a device layer 40, and a pixel defining layer 50. A device layer 40 is located on the substrate 30 and a pixel definition layer 50 is located on the device layer 40. The device layer 40 includes a planarization layer 45 and at least one metal layer 46, the metal layer 46 being located between the planarization layer 45 and the substrate 30.

In some embodiments, the interconnection structures 203 of the third same-color pixel group 03 in the central area AA11 and the edge area AA12 are located on any one of the at least one metal layer 46. The interconnection structure 203 of the third same-color pixel group 03 is electrically connected to the corresponding first electrode 112 through a via. The metal layer 46 where the interconnection structure 203 is located may be an upper electrode plate of a capacitor, and only a via structure needs to be formed in the preparation process to connect the corresponding first electrode and the upper electrode plate of the capacitor, so that the interconnection structure 203 of the third same-color pixel group 03 is formed, and the preparation process is simplified.

In some embodiments, the

interconnection structures

201 and 202 of the edge area AA12 may be located above the planarization layer 45 when disposed on the same layer as the first electrode 112. The

interconnect structures

201 and 202 of the central area AA11 may be located below the planarization layer 45 when located below the first electrode 112. The

interconnect structures

201 and 202 are electrically connected to the corresponding first electrodes 112 through vias when they are located below the first electrodes 112.

In some embodiments, the second display area AA2 includes a first sub-display area AA21 and a second sub-display area AA22 adjacent to the first sub-display area AA21 and the first display area AA1, and the first pixel circuits 120 corresponding to the first sub-pixels of the first display area AA1 are disposed in the second sub-display area AA 22. It is understood that the number of the first pixel circuits 120 corresponding to the first sub-pixels of the first display area AA1 may be multiple, and the first pixel circuits are electrically connected to the corresponding same-color pixel groups, respectively.

In some embodiments, the circuit structure of the first pixel circuit is any one of a 1T circuit, a 2T1C circuit, a 3T1C circuit, a 6T1C circuit, a 6T2C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit. Herein, the "2T 1C circuit" refers to a pixel circuit including 2 thin film transistors (T) and 1 capacitor (C) in the pixel circuit, and the other "7T 1C circuit", "7T 2C circuit", "9T 1C circuit", and the like are analogized.

According to the display panel 100 of the embodiment of the invention, the first pixel circuit 120 for driving each first sub-pixel of the same-color pixel group to display is located in the second sub-display area AA22, so that the wiring structure in the first display area AA1 is reduced, and the light transmittance of the first display area AA1 is further improved.

In some embodiments, the display panel 100 further includes a second sub-pixel and a third sub-pixel (not shown). A plurality of second sub-pixels are located in the second sub-display area AA 22; a plurality of third sub-pixels are located at the first sub-display area AA 21.

In some embodiments, the size of the second sub-pixel is the same as that of the third sub-pixel of the same color, so that the display difference between the second sub-display area AA22 and the first sub-display area AA21 is reduced, and the display uniformity is improved.

In some embodiments, the size of the first sub-pixel is smaller than that of the third sub-pixel of the same color, so that the area of the non-light emitting region in the first display region AA1 is larger, which facilitates further improving the light transmittance of the first display region AA 1.

In some embodiments, at least two pixels 110 included in the repeating unit 10 are alternately distributed in the first direction D1, each sub-pixel of any two adjacent pixels 110 is arranged along the second direction D2 and is shifted in the first direction D1, and the first direction D1 intersects with the second direction D2. Preferably, the first direction D1 is perpendicular to the second direction D2, the first direction D1 may be a row direction or a column direction, and the corresponding second direction D2 may be a column direction or a row direction.

In some embodiments, the color order of the sub-pixels of any two adjacent pixels 110 arranged along the second direction D2 is different. Illustratively, as shown in fig. 2, the repeating unit 10 includes four pixels 110, and each pixel 110 includes three color sub-pixels. Taking one repeating unit 10 as an example, the color sequence of the sub-pixels of the left first pixel 110 arranged along the second direction D2 may be a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The color sequence of the sub-pixels of the second left pixel 110 arranged along the second direction D2 may be a blue sub-pixel, a red sub-pixel, and a green sub-pixel. The color order of the sub-pixels of the right first pixel 110 arranged in the second direction D2 is the same as the order of the left second pixel 110, and the color order of the sub-pixels of the right second pixel 110 arranged in the second direction D2 is the same as the order of the left first pixel 110.

By such arrangement, colors of sub-pixels adjacently arranged in the second direction in the first display area AA1 are different, distribution of sub-pixels with the same color is more uniform, the problem that color distribution is uneven when the first display area AA1 is displayed due to the fact that a plurality of sub-pixels with the same color are adjacent in a certain area of the first display area AA1 can be avoided, and then a bright strip with a single color is generated in the area can be solved, and the display effect of the first display area AA1 can be improved.

In some embodiments, the substrate 30 may be made of a light-transmitting material such as glass, Polyimide (PI), and the like. The device layer 40 of the second display area AA2 may include pixel circuits for driving the display of the respective sub-pixels. The pixel defining layer 50 includes a first pixel opening K1 located at the first display area AA 1. In some embodiments, the pixel defining layer 50 includes a second pixel opening located in the second display area AA 2.

In some embodiments, each of the

first sub-pixels

101, 102, 103 includes a light emitting structure 111, a first electrode 112, and a second electrode 113. The light emitting structure 111 of the first display area AA1 is located in the first pixel opening K1, the first electrode 112 is located on a side of the light emitting structure 111 facing the substrate 30, and the second electrode 113 is located on a side of the light emitting structure 111 facing away from the substrate 30.

One of the first electrode 112 and the second electrode 113 is an anode, and the other is a cathode. In this embodiment, the first electrode 112 is an anode and the second electrode 113 is a cathode.

The light emitting structure 111 may include an OLED light emitting layer, and may further include at least one of a hole injection layer, a hole transport layer, an electron injection layer, or an electron transport layer according to design requirements of the light emitting structure 111.

In some embodiments, the first electrode 112 is a light transmissive electrode. In some embodiments, the first electrode 112 includes an Indium Tin Oxide (ITO) layer or an Indium zinc Oxide (izo) layer. In some embodiments, the first electrode 112 is a reflective electrode, and includes a first light-transmissive conductive layer, a reflective layer on the first light-transmissive conductive layer, and a second light-transmissive conductive layer on the reflective layer. The first and second transparent conductive layers may be ITO, indium zinc oxide, etc., and the reflective layer may be a metal layer, such as made of silver.

In some embodiments, the second electrode 113 comprises a magnesium silver alloy layer. In some embodiments, the second electrodes 113 may be interconnected as a common electrode.

In some embodiments, the projection of each light emitting structure 111 of the first display area AA1 in the direction perpendicular to the display panel 100 is composed of one first graphic element or is composed of two or more first graphic elements in a mosaic manner, and the first graphic element includes at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd, and a rectangle.

In some embodiments, a projection of each first electrode 112 of the first display area AA1 in a direction perpendicular to the display panel 100 is composed of one second graphic element or is composed of two or more second graphic elements in a mosaic manner, and the second graphic elements include at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd, and a rectangle.

The periodic structure generated by diffraction can be changed by the shape, namely, the distribution of a diffraction field is changed, so that the diffraction effect generated when external incident light passes through the first display area AA1 is weakened, and the image photographed by a camera arranged below the first display area AA1 is ensured to have higher definition.

For example, the display panel 100 may further include an encapsulation layer, and a polarizer and a cover plate located above the encapsulation layer, or the cover plate may be directly disposed above the encapsulation layer, without disposing a polarizer, or at least the cover plate may be directly disposed above the encapsulation layer of the first display area AA1, without disposing a polarizer, so as to avoid the polarizer from affecting the light collection amount of the photosensitive element disposed below the first display area AA1, and of course, the polarizer may also be disposed above the encapsulation layer of the first display area AA 1.

An embodiment of the present invention further provides a display device, which may include the display panel 100 of any of the above embodiments. The following description will be given taking as an example a display device of an embodiment including the display panel 100 of the above-described embodiment.

Fig. 5 is a schematic top view of a display device according to an embodiment of the present invention, and fig. 6 is a cross-sectional view taken along line C-C of fig. 5 according to an embodiment of the present invention. In the display device of the present embodiment, the display panel 100 may be the display panel 100 of one of the above embodiments, the display panel 100 has a first display area AA1 and a second display area AA2, and the light transmittance of the first display area AA1 is greater than that of the second display area AA 2.

The display panel 100 includes a first surface S1 and a second surface S2 opposite to each other, wherein the first surface S1 is a display surface. The display device further includes a photosensitive element 200, wherein the photosensitive element 200 is located on the second surface S2 side of the display panel 100, and the photosensitive element 200 corresponds to the first display area AA 1.

The photosensitive assembly 200 may be an image capturing device for capturing external image information. In this embodiment, the photosensitive assembly 200 is a Complementary Metal Oxide Semiconductor (CMOS) image capture device, and in some other embodiments, the photosensitive assembly 200 may also be a Charge-coupled device (CCD) image capture device or other types of image capture devices. It is understood that the photosensitive assembly 200 may not be limited to an image capture device, for example, in some embodiments, the photosensitive assembly 200 may also be an infrared sensor, a proximity sensor, an infrared lens, a flood sensing element, an ambient light sensor, a dot matrix projector, and the like. In addition, the display device may further integrate other components, such as a handset, a speaker, etc., on the second surface S2 of the display panel 100.

According to the display device provided by the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate the photosensitive assembly 200 on the back of the first display area AA1, for example, the photosensitive assembly 200 of an image acquisition device is integrated under a screen, and meanwhile, the first display area AA1 can display pictures, so that the display area of the display panel 100 is increased, and the full-screen design of the display device is realized.

According to the display device of the embodiment of the invention, the first pixel circuit 120 for driving the

first sub-pixels

101, 102, 103 to display is located in the second display area AA2, so that the wiring structure in the first display area AA1 is reduced, and the light transmittance of the first display area AA1 is improved. The width of the first wire L1 connecting the

first sub-pixels

101, 102, 103 can be disposed in the first display area AA1, thereby improving the PPI of the first display area AA1 and improving the display effect. Alternatively, under the condition that the PPI of the first display area AA1 is kept unchanged, the area of the first display area AA1 can be set to be larger, so that the wide-angle camera is integrated on the back of the first display area AA1, and the requirement of the wide-angle camera for a transparent area with a larger area is met.

In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel having a first display area and a second display area, the first display area including a central area and an edge area adjacent to the central area, a light transmittance of the first display area being greater than a light transmittance of the second display area, the display panel comprising:

a plurality of first sub-pixels located in the first display region;

the first pixel circuits are located in the second display area, connected with the first sub-pixels in the edge area through first wires, connected with the first sub-pixels in the central area through second wires, and used for driving the first sub-pixels to display;

wherein the width of the first trace is smaller than the width of the second trace.

2. The display panel according to claim 1, wherein the first traces are metal traces and the second traces are transparent traces;

preferably, the first wire includes any one of a copper film wire, an aluminum film wire, a molybdenum film wire or a titanium aluminum titanium composite film wire;

preferably, the second wire includes any one of an indium tin oxide film wire and an indium zinc oxide film wire;

preferably, the first trace and/or the second trace are/is a curved line.

3. The display panel according to claim 1, wherein the width of the first trace is less than or equal to 4 μm.

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

a substrate;

5. The display panel according to claim 1, wherein the first display region comprises a plurality of repeating units, each repeating unit comprises at least two pixels, each pixel comprises at least three colors of the first sub-pixels, and each first sub-pixel comprises a first electrode, a light emitting structure, and a second electrode sequentially stacked;

6. The display panel according to claim 5,

the pixels comprise the first sub-pixels of three colors, and the corresponding homocolor pixel groups comprise a first homocolor pixel group of a first color, a second homocolor pixel group of a second color and a third homocolor pixel group of a third color, wherein orthographic projections of the interconnection structures of the first homocolor pixel group and the interconnection structures of the second homocolor pixel group in the direction vertical to the display panel are not intersected;

further, the interconnection structure of the third homochromatic pixel group intersects with the interconnection structure of the first homochromatic pixel group and/or the interconnection structure of the second homochromatic pixel group in an orthographic projection in the direction perpendicular to the display panel;

wherein, in the central area, the interconnection structure of the same-color pixel group of at least one color is a transparent conductive structure.

7. The display panel according to claim 6,

the interconnection structure of the third homochromatic pixel group is different from the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group in layers;

the interconnection structure of the third homochromatic pixel group, the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group are arranged in the same layer with the first electrode;

furthermore, the material of the interconnection structure of the first homochromatic pixel group and the interconnection structure of the second homochromatic pixel group in the edge area is the same as that of the first electrode, or the interconnection structures are transparent conductive structures; and/or the presence of a gas in the gas,

the first same-color pixel group and the second same-color pixel group in the central area correspond to second wires which are transparent wires arranged in the same layer with the interconnection structure of the first same-color pixel group and the interconnection structure of the second same-color pixel group in the central area.

8. The display panel according to claim 1, wherein the second display region includes a first sub-display region and a second sub-display region adjoining the first sub-display region and the first display region, and the first pixel circuit is disposed in the second sub-display region;

a plurality of second sub-pixels located in the second sub-display regions;

a plurality of third sub-pixels located in the first sub-display region;

preferably, the size of the second sub-pixel is the same as the size of the third sub-pixel of the same color;

9. The display panel according to claim 1, wherein the first sub-pixel comprises a first electrode, a light emitting structure, and a second electrode sequentially stacked;

preferably, the projection of the light-emitting structure in the direction perpendicular to the display panel is composed of one first graphic unit or is composed of more than two first graphic units in a spliced manner, and the first graphic unit comprises at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd and a rectangle;

preferably, the projection of the first electrode in the direction perpendicular to the display panel is composed of one second graphic unit or is composed of more than two second graphic units which are spliced, and the second graphic unit comprises at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd and a rectangle;

preferably, the first electrode of the first display area is a light-transmitting electrode;

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