CN111899648B

CN111899648B - Display panel and display device

Info

Publication number: CN111899648B
Application number: CN202010855411.4A
Authority: CN
Inventors: 陈伟伟; 刘如胜
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2022-09-20
Anticipated expiration: 2040-08-24
Also published as: CN111899648A

Abstract

The invention discloses a display panel and a display device, wherein the display panel is provided with a first display area which can transmit light, and the display panel comprises: a substrate; the first signal line is positioned on the substrate, at least part of the first signal line extends to the first display area, the first signal line comprises an auxiliary conducting layer and a transparent conducting layer which are arranged in a stacked mode and electrically connected with each other, the orthographic projection width of the transparent conducting layer on the substrate is not smaller than the orthographic projection width of the auxiliary conducting layer on the substrate, and the resistivity of the auxiliary conducting layer is smaller than that of the transparent conducting layer. The display panel provided by the invention can facilitate the under-screen integration of the photosensitive assembly, reduce the wiring load in the first display area and improve the display effect of the display panel.

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.

Traditional electronic equipment such as cell-phone, panel computer etc. need integrate functional component such as leading camera, earphone and infrared sensing element, can set up the printing opacity display area on electronic equipment, but if the printing opacity display area sets up unreasonablely, lead to the display effect of this part display area poor.

Disclosure of Invention

The invention provides a display panel and a display device, which are convenient for the under-screen integration of a photosensitive assembly, improve the screen occupation ratio and simultaneously improve the display effect of the display panel.

In one aspect, an embodiment of the present invention provides a display panel having a first display region capable of transmitting light, the display panel including: a substrate; the first signal line is positioned on the substrate, at least part of the first signal line extends to the first display area, the first signal line comprises an auxiliary conducting layer and a transparent conducting layer which are arranged in a stacked mode and electrically connected with each other, the orthographic projection width of the transparent conducting layer on the substrate is not smaller than the orthographic projection width of the auxiliary conducting layer on the substrate, and the resistivity of the auxiliary conducting layer is smaller than that of the transparent conducting layer.

According to an aspect of an embodiment of the invention, the transparent conductive layer is located on a side of the auxiliary conductive layer facing away from the substrate;

optionally, the thickness of the auxiliary conductive layer is greater than or equal to the orthographic projection width of the auxiliary conductive layer on the substrate;

optionally, the first signal line is at least one of a first scan line and a first data line.

According to an aspect of an embodiment of the present invention, the display panel further has a second display region having a light transmittance smaller than that of the first display region, and the display panel further includes: and the second signal line is positioned on the substrate, at least part of the second signal line extends to the second display area, wherein in the first signal line and the second signal line of the same signal type, the auxiliary conductive layer in the first signal line and the second signal line are arranged in the same layer and have the same material.

According to an aspect of an embodiment of the present invention, in the first signal line and the second signal line of the same signal type, a thickness of the auxiliary conductive layer in the first signal line is larger than a thickness of the second signal line.

According to an aspect of an embodiment of the present invention, the resistance of the first signal line is 0.8 to 1.3 times the resistance of the second signal line of the same signal type in a unit extension length.

According to an aspect of the embodiment of the present invention, the orthographic projection width of the transparent conductive layer on the substrate is 1-10 times of the orthographic projection width of the auxiliary conductive layer on the substrate.

According to one aspect of the embodiments of the present invention, the width of the orthographic projection of the auxiliary conductive layer on the substrate is less than or equal to 800 nanometers, and the thickness of the auxiliary conductive layer is greater than 50 nanometers;

optionally, the thickness of the auxiliary conductive layer is 500-800 nm.

According to one aspect of an embodiment of the present invention, the width of the orthographic projection of the transparent conductive layer on the substrate is greater than or equal to 2.5 microns.

According to an aspect of an embodiment of the present invention, the resistance of the auxiliary conductive layer is less than or equal to 1/1600 times the resistance of the transparent conductive layer per unit extension length;

optionally, the auxiliary conductive layer and the transparent conductive layer extend synchronously along a predetermined direction, or the transparent conductive layer extends along the predetermined direction, the auxiliary conductive layer includes a plurality of conductive blocks arranged at intervals along the predetermined direction, and each conductive block is electrically connected with the transparent conductive layer;

optionally, the auxiliary conductive layer comprises a metal, and the transparent conductive layer comprises at least one of indium tin oxide and indium zinc oxide;

optionally, the auxiliary conductive layer includes a first metal sublayer, a second metal sublayer and a third metal sublayer stacked in a direction away from the substrate, the first metal sublayer and the third metal sublayer are made of titanium, and the second metal sublayer is made of aluminum.

On the other hand, an embodiment of the present invention further provides a display device, including the display panel according to any one of the above embodiments.

According to the display panel and the display device provided by the embodiment of the invention, the display panel is provided with the first display area which can transmit light, 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, and 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 facilitated.

Furthermore, the display panel comprises a substrate and a first signal line which is located on the substrate and extends to the first display area, the first signal line comprises an auxiliary conducting layer and a transparent conducting layer which are arranged in a stacked mode and electrically connected with each other, the resistivity of the auxiliary conducting layer is smaller than that of the transparent conducting layer, when the first signal line transmits an electric signal, the electric signal can be transmitted in the transparent conducting layer and the auxiliary conducting layer in parallel, the resistance of the first signal line is effectively reduced, the blocking of the first signal line to light is reduced at the same time, the display effect of the display panel is effectively improved, meanwhile, the width of the orthographic projection of the transparent conducting layer on the substrate is larger than or equal to the orthographic projection width of the auxiliary conducting layer on the substrate, the light transmittance of the first display area is convenient to improve, and the use performance of the photosensitive assembly is convenient to improve.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings in which like or similar reference characters refer to like or similar parts and which are not necessarily drawn to scale.

FIG. 1 is a top view of a display panel according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at Q1 provided by one embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along the line C-C of FIG. 2;

FIG. 4 is a schematic cross-sectional view of a first display area provided by an embodiment of the invention;

FIG. 5 is a schematic cross-sectional view of a second display area provided in accordance with one embodiment of the present invention;

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

fig. 7 is a sectional view taken along the direction D-D in fig. 6.

In the figure:

100-a display panel; AA 1-first display area; AA2 second display area; NA-non-display area; x-a first direction; y-a second direction;

10-a substrate;

21-a first signal line; 211-a first scan line; 212-first data line; 213-auxiliary conductive layer; 2131-a first metal sublayer; 2132-a second metal sublayer; 2133-a third metal sublayer; 214-a transparent conductive layer; 22-a second signal line; 221-a second scan line; 222-a second data line; 23-a first pixel circuit; 231-an active layer; 232-gate layer; 233-source drain layer; 24-a second pixel circuit;

31-a first sub-pixel; 311-a first electrode; 312 — a second electrode; 313-a first light emitting structure; 32-a second sub-pixel; 321-a third electrode; 322-a fourth electrode; 323-a second light emitting structure;

40-pixel definition layer;

51-a first support column; 52-a second support column;

200-a photosensitive component;

1000-display device.

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.

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

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 effectively transmit electrical signals, a metal conductive material with a relatively low resistivity is usually used to fabricate signal lines on a display panel, and when a transparent display area is disposed on the display panel, in order to improve the light transmittance of the transparent display area, each signal line of the transparent display area is fabricated by using a transparent conductive material instead of a metal conductive material, for example, signal lines such as scan lines and data lines of the transparent display area are fabricated by using materials such as Indium Tin oxide (Indium Tin Oxides), but the resistivity of the transparent conductive material is relatively high, so that the load of each signal line is relatively large, the electrical property of each signal line is poor, and the display effect of the transparent display area is affected.

In order to solve the above problems, embodiments of the present invention provide a display panel 100 and a display device 1000. The display panel 100 and the display device 1000 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 3 together, fig. 1 is a top view of a display panel according to an embodiment of the present invention, fig. 2 is an enlarged schematic view of a position Q1 according to an embodiment of the present invention, and fig. 3 is a schematic cross-sectional view taken along a direction C-C in fig. 2. The embodiment of the invention provides a display panel 100, which has a first display area AA1 capable of transmitting light, optionally, the display panel 100 further has a second display area AA2 located at an outer peripheral side of at least a portion of the first display area AA1, and a non-display area NA located at an outer peripheral side of the first display area AA1 and the second display area AA2, and the display panel 100 includes a substrate 10 and a first signal line 21 located on the substrate 10.

The first signal line 21 is located on the substrate 10, and at least a portion of the first signal line 21 extends to the first display area AA1, wherein the first signal line 21 includes an auxiliary conductive layer 213 and a transparent conductive layer 214 that are stacked and electrically connected to each other, a width of an orthogonal projection of the transparent conductive layer 214 on the substrate 10 is greater than or equal to a width of an orthogonal projection of the auxiliary conductive layer 213 on the substrate 10, and a resistivity of the auxiliary conductive layer 213 is smaller than a resistivity of the transparent conductive layer 214. It is to be understood that the auxiliary conductive layer 213 and the transparent conductive layer 214 are stacked and disposed in order in the thickness direction of the display panel 100 and are in contact with each other. The orthographic projection of the auxiliary conductive layer 213 on the substrate 10 may be located in the middle of the orthographic projection of the transparent conductive layer 214 on the substrate 10, or the orthographic projection of the auxiliary conductive layer 213 on the substrate 10 is disposed close to the edge of the orthographic projection of the transparent conductive layer 214 on the substrate 10, and the invention is not limited thereto as long as the orthographic projection of the transparent conductive layer 214 on the substrate 10 covers the orthographic projection of the auxiliary conductive layer 213 on the substrate 10.

Herein, it is preferable that the light transmittance of the first display area AA1 is greater than or equal to 15%. 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%.

In the embodiment of the invention, the first display area AA1 capable of transmitting light is arranged, so that the display panel 100 can integrate the photosensitive component 200 on the back of the first display area AA1, and the photosensitive component 200 such as a camera can be 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 overall screen design of the display device 1000 is realized.

Meanwhile, the first signal line 21 of the display panel 100 according to the embodiment of the present invention includes the auxiliary conductive layer 213 and the transparent conductive layer 214 that are stacked and electrically connected to each other, so that an electrical signal can be transmitted in parallel between the transparent conductive layer 214 and the auxiliary conductive layer 213, so as to effectively reduce the resistance of the first signal line 21 and reduce the shielding of the first signal line 21 from light, and improve the light transmittance of the first display area AA1 and the display effect of the display panel 100.

When the width of the transparent conductive layer 214 is small, the transparent conductive layer 214 is easily disconnected in the manufacturing process, so that an insulating film layer manufactured after the transparent conductive layer 214 is filled between the disconnected transparent conductive layers 214, and thus, an electrical signal is easily not transmitted in the transparent conductive layer 214.

Optionally, the thickness of the auxiliary conductive layer 213 is greater than or equal to the orthographic projection width of the auxiliary conductive layer 213 on the substrate 10, so that the sectional area of the auxiliary conductive layer 213 can be increased, the routing load of the auxiliary conductive layer 213 can be effectively reduced, and the display effect of the display panel 100 can be effectively improved.

In order to enable the first display area AA1 to display a picture, in some embodiments, the display panel 100 further includes a first sub-pixel 31 located in the first display area AA1 and a first pixel circuit 23 for driving the first sub-pixel 31 to emit light, and further, the display panel 100 further includes a wiring structure electrically connected to the first pixel circuit 23, such as a scan line and a data line, for controlling the corresponding sub-pixel to emit light for display. In order to reduce the influence of each wiring structure on the light transmittance of the first display area AA1, in some embodiments, the first signal line 21 is at least one of the first scan line 211 and the first data line 212.

In a specific implementation, the first signal line 21 may be a first scan line 211 or a first data line 212, that is, the first scan line 211 or the first data line 212 includes an auxiliary conductive layer 213 and a transparent conductive layer 214 that are stacked in a direction away from the substrate 10 and electrically connected to each other, and compared with the case that the first scan line 211 or the first data line 212 is made as a single transparent conductive line, the first signal line 21 according to the embodiment of the present invention can effectively reduce the routing load of the first scan line 211 or the first data line 212. Optionally, the first signal line 21 may be a first scan line 211 and a first data line 212, that is, the first scan line 211 and the first data line 212 are both provided as a stacked auxiliary conductive layer 213 and a stacked transparent conductive layer 214, so as to effectively reduce the wiring load of the first scan line 211 and the first data line 212, and improve the uniformity of light emission of a plurality of sub-pixels electrically connected to the first scan line 211 and the first data line 212. Optionally, the first signal line 21 may also be an anode power supply line, a cathode power supply line, a light emitting signal control line, or the like, and a user may manufacture the wiring structure in the first display area AA1 into a composite structure in which the transparent conductive layer 214 and the auxiliary conductive layer 213 are stacked according to the embodiment of the present invention, so as to reduce the wiring load in the first display area AA1 while ensuring the light transmittance of the first display area AA 1.

In some embodiments, the display panel 100 further has a second display area AA2, and the light transmittance of the second display area AA2 is less than that of the first display area AA1, and optionally, the pixel density (Pixels Per Inch, PPI) of the second display area AA2 may be greater than that of the first display area AA1, or the size of the front projection of the sub-Pixels of the second display area AA2 on the substrate 10 is greater than that of the front projection of the sub-Pixels of the first display area AA1 on the substrate 10, so as to increase the light transmittance of the first display area AA1 and facilitate the under-screen integration of the photosensitive assembly 200.

Accordingly, the display panel 100 further includes a second signal line 22 disposed on the substrate 10, and at least a portion of the second signal line 22 extends to the second display area AA2, wherein, in the first signal line 21 and the second signal line 22 of the same signal type, the auxiliary conductive layer 213 in the first signal line 21 is disposed at the same layer and has the same material as the second signal line 22. The same signal type means that the same type of signal is transmitted through the first signal line 21 and the second signal line 22, and for example, when a Scan signal (Scan), a Data signal (Data), or an emission signal (EM) is transmitted through both the first signal line 21 and the second signal line 22, the first signal line 21 and the second signal line 22 are the same signal type. By arranging the first signal line 21 and the second signal line 22 of the same signal type, and arranging the auxiliary conductive layer 213 in the first signal line 21 and the second signal line 22 in the same layer and with the same material, the manufacturing of the first signal line 21 and the second signal line 22 of the same signal type is facilitated, and the routing load of the first signal line 21 and the second signal line 22 is facilitated to be close, so that the uniformity of the display effect of the first display area AA1 and the second display area AA2 is improved.

In a specific implementation, the second signal line 22 includes a second scan line 221 and a second data line 222, wherein the second scan line 221 and the first scan line 211 are signal lines of the same signal type, and the second data line 222 and the first data line 212 are signal lines of the same signal type, at this time, the auxiliary conductive layer 213 in the first scan line 211 and the second scan line 221 may be disposed on the same layer and have the same material, the auxiliary conductive layer 213 in the first data line 212 and the second data line 222 may be disposed on the same layer and have the same material, and the routing load of the first signal line 21 and the second signal line 22 may be easily approached.

In some embodiments, in the first signal line 21 and the second signal line 22 of the same signal type, the thickness of the auxiliary conductive layer 213 in the first signal line 21 is greater than that of the second signal line 22. Alternatively, in the first signal line 21 and the second signal line 22 of the same signal type, the width of the orthogonal projection of the auxiliary conductive layer 213 in the first signal line 21 on the substrate 10 is smaller than the width of the orthogonal projection of the second signal line 22 on the substrate 10. With the above arrangement, when the width of the orthogonal projection of the auxiliary conductive layer 213 on the substrate 10 in the first signal line 21 is small, the cross-sectional area of the auxiliary conductive layer 213 can be increased by increasing the thickness of the auxiliary conductive layer 213, and as can be seen from the formula of calculating the conductor resistance R, where ρ is the resistivity of the conductor, L is the length of the conductor, and S is the cross-sectional area of the conductor, the resistance of the auxiliary conductive layer 213 can be reduced by increasing the cross-sectional area of the auxiliary conductive layer 213, thereby effectively reducing the resistance of the first signal line 21.

When the first signal line 21 extends to the first display area AA1 and the second signal line 22 extends to the second display area AA2, in order to approximate the signal transmission effect of the first display area AA1 and the second display area AA2 and approximate the display effect of the first display area AA1 and the second display area AA2, in some embodiments, the resistance of the first signal line 21 is 0.8 to 1.3 times that of the second signal line 22 of the same signal type within a unit extension length.

Since the width of the orthographic projection of the transparent conductive layer 214 on the substrate 10 is greater than the width of the orthographic projection of the auxiliary conductive layer 213 on the substrate 10, in order to reasonably set the width of the transparent conductive layer 214 and the width of the auxiliary conductive layer 213 to ensure the light transmittance of the first display area AA1 and reduce the load of the first signal line 21, in some embodiments, the width of the orthographic projection of the transparent conductive layer 214 on the substrate 10 is 1 to 10 times the width of the orthographic projection of the auxiliary conductive layer 213 on the substrate 10, and optionally, the width of the orthographic projection of the transparent conductive layer 214 on the substrate 10 is 2 to 10 times the width of the orthographic projection of the auxiliary conductive layer 213 on the substrate 10. In specific implementation, the widths of the transparent conductive layer 214 and the auxiliary conductive layer 213 may be set according to user requirements, for example, the width of the orthographic projection of the transparent conductive layer 214 on the substrate 10 is greater than or equal to 3 times, or 6.5 times, or 10 times the width of the orthographic projection of the auxiliary conductive layer 213 on the substrate 10. The width of the orthographic projection of the transparent conducting layer 214 on the substrate 10 is reasonably set to avoid overlarge routing resistance of the transparent conducting layer 214, and meanwhile, the orthographic projection of the transparent conducting layer 214 on the substrate 10 can completely cover the orthographic projection of the auxiliary conducting layer 213 on the substrate 10 and is electrically connected with the auxiliary conducting layer 213, so that the situation that the routing is disconnected in the manufacturing process and electric signals cannot be transmitted due to the fact that the width of the auxiliary conducting layer 213 is too small is prevented.

Based on this, in some embodiments, the width of the orthographic projection of the auxiliary conductive layer 213 on the substrate 10 is less than or equal to 800 nm, and by the above arrangement, the process can be facilitated while the influence of the auxiliary conductive layer 213 on the transmitted light can be reduced. Optionally, the thickness of the auxiliary conductive layer 213 is greater than 50 nanometers, in a specific embodiment, the thickness of the auxiliary conductive layer 213 may be 500 nanometers to 800 nanometers, or the thickness of the auxiliary conductive layer 213 may also be greater than 800 nanometers, and by reasonably setting the thickness of the auxiliary conductive layer 213, not only the process manufacturing can be facilitated, but also the cross-sectional area of the auxiliary conductive layer 213 can be effectively increased, and the routing resistance of the auxiliary conductive layer 213 is reduced, so that the routing resistance of the first signal line 21 is reduced, and the display performance of the display panel 100 is improved.

Alternatively, the width of the orthographic projection of the transparent conductive layer 214 on the substrate 10 may be greater than or equal to 2.5 microns. With the above arrangement, the orthographic projection of the transparent conductive layer 214 on the substrate 10 completely covers the orthographic projection of the auxiliary conductive layer 213 on the substrate 10, so that the stability of the electrical signal transmission of the first signal line 21 is ensured, and at the same time, the light transmittance of the first display area AA1 can be improved.

In order to reduce the trace load of the first signal line 21 in the first display area AA1, in some embodiments, the resistance of the auxiliary conductive layer 213 is equal to or greater than 1/1600 times the resistance of the transparent conductive layer 214 within a unit extension length, and by reasonably setting the ratio between the resistance of the auxiliary conductive layer 213 and the resistance of the transparent conductive layer 214, the resistance of the auxiliary conductive layer 213 and the resistance of the transparent conductive layer 214 after being connected in parallel can be effectively reduced, so that the load of the first signal line 21 is reduced, the electrical signal transmission performance of the first signal line 21 is improved, the wiring power consumption of the display panel 100 is reduced, and the service life of the display panel 100 is prolonged.

Alternatively, the auxiliary conductive layer 213 and the transparent conductive layer 214 extend in synchronization with each other in a predetermined direction, or the transparent conductive layer 214 extends in a predetermined direction, and the auxiliary conductive layer 213 includes a plurality of conductive blocks arranged at intervals in the predetermined direction, each of which is electrically connected to the transparent conductive layer 214. Through the above arrangement, the composite first signal line 21 composed of the auxiliary conductive layer 213 and the transparent conductive layer 214 can reduce the trace load while having a low influence on the transmittance of the first display area AA 1.

In an embodiment, referring to fig. 2, when the first signal line 21 is a first data line 212 and a first scan line 211, the first scan line 211 extends along a first direction X and is arranged along a second direction Y, and the first data line 212 extends along the second direction Y and is arranged along the first direction X, wherein the first direction X intersects the second direction Y. Alternatively, the first direction X may be a row direction of the display panel 100, and the second direction Y may be a column direction of the display panel 100. The first scanning line 211 includes a first auxiliary conductive structure and a first transparent conductive structure that are stacked and disposed in a direction away from the substrate 10 and electrically connected to each other, the first auxiliary conductive structure and the first transparent conductive structure both extend in the same length in synchronization along the first direction X, or the first transparent conductive structure extends along the first direction X, the first auxiliary conductive structure includes a plurality of first auxiliary conductive blocks disposed at intervals along the first direction X, and each first auxiliary conductive block is electrically connected to the first transparent conductive structure. Optionally, the first data line 212 includes a second auxiliary conductive structure and a second transparent conductive structure that are stacked and electrically connected to each other in a direction away from the substrate 10. The second auxiliary conductive structure and the second transparent conductive structure extend synchronously along the second direction Y, or the second transparent conductive structure extends along the second direction Y, the second auxiliary conductive structure comprises a plurality of second auxiliary conductive blocks arranged at intervals along the second direction Y, and each second auxiliary conductive block is electrically connected with the second transparent conductive structure.

In some embodiments, the first scan line 211 and the second scan line 221 corresponding to the position along the second direction Y are electrically connected to each other, that is, the first scan line 211 and the second scan line 221 located in the same row are electrically connected to each other. The first data line 212 and the second data line 222 corresponding to the position along the first direction X are electrically connected to each other, that is, the first data line 212 and the second data line 222 located in the same column are electrically connected to each other, so as to facilitate the wiring arrangement of the display panel 100 and improve the display effect of the first display area AA1 and the second display area AA 2.

In order to reduce the trace load of the first signal line 21, optionally, the composition material of the auxiliary conductive layer 213 includes a metal, and the composition material of the transparent conductive layer 214 includes at least one of indium tin oxide and indium zinc oxide. Optionally, the auxiliary conductive layer 213 includes a first metal sublayer 2131, a second metal sublayer 2132, and a third metal sublayer 2133 stacked in a direction away from the substrate 10, where the first metal sublayer 2131 and the third metal sublayer 2133 are both made of titanium (Ti), the second metal sublayer 2132 is made of aluminum (Al), and at this time, the auxiliary conductive layer 213 may be a stacked structure of Ti — Al — Ti. With the above arrangement, the resistivity of the auxiliary conductive layer 213 is made small, and signal transmission is facilitated.

When the first signal line 21 is formed, the auxiliary conductive layer 213 may be formed on one side of the substrate 10, and the three-dimensional auxiliary conductive layer 213 with a narrow line width and a high thickness may be formed by a plating process, a photolithography process, an etching process, a photoresist removing process, or the like. Then, on the side of the auxiliary conductive layer 213 facing away from the substrate 10, a transparent conductive layer 214 is formed by evaporation using a transparent conductive material, such as an indium tin oxide material, wherein the transparent conductive layer 214 covers the auxiliary conductive layer 213.

When the auxiliary conductive layer 213 of the embodiment of the present invention is a Ti-Al-Ti stacked structure and the transparent conductive layer 214 is made of Indium Tin Oxide (ITO), a sheet resistance of the transparent conductive layer 214 is 80 ohms, the sheet resistance of the auxiliary conductive layer 213 is 0.05 ohms, and a ratio between a width of the auxiliary conductive layer 213 on the substrate 10 and a width of the transparent conductive layer 214 on the substrate 10 satisfies 1-10, it can be calculated that an overall trace resistance of the auxiliary conductive layer 213 and the transparent conductive layer 214 connected in parallel according to the embodiment of the present invention can be reduced by 99.8% compared with a resistance of a single-layer ITO conductive layer, so that the trace load of the first signal line 21 of the embodiment of the present invention can be reduced by more than 99.8% compared with the single-layer ITO conductive layer.

Referring to fig. 4 and 5, fig. 4 is a schematic cross-sectional view of a first display area according to an embodiment of the invention, and fig. 5 is a schematic cross-sectional view of a second display area according to an embodiment of the invention. In some embodiments, the display panel 100 further includes a first sub-pixel 31 located in the first display area AA1 and a first pixel circuit 23 for driving the first sub-pixel 31 to emit light, and a second sub-pixel 32 located in the second display area AA2 and a second pixel circuit 24 for driving the second sub-pixel 32 to emit light for display. In order to improve the light transmittance of the first display area AA1, the pixel density of the first display area AA1 may be less than that of the second display area AA2, for example, the distance between two adjacent first sub-pixels 31 along the first direction X (row direction) may be 2 times the distance between two adjacent second sub-pixels 32 along the first direction X, and the distance between two adjacent first sub-pixels 31 along the second direction Y (column direction) may be 2 times the distance between two adjacent second sub-pixels 32 along the second direction Y. Alternatively, the distance between two adjacent first sub-pixels 31 may be set equal to the distance between two adjacent second sub-pixels 32, and in this case, the size of the orthographic projection of the first sub-pixels 31 on the substrate 10 may be set to be small.

In some embodiments, the first sub-pixel 31 and the second sub-pixel 32 have different colors. The first subpixel 31 may include a red first subpixel 31, a green first subpixel 31, and a blue first subpixel 31. Similarly, the second sub-pixel 32 of the display panel 100 in the second display area AA2 may include a red second sub-pixel 32, a green second sub-pixel 32, and a blue second sub-pixel 32.

It should be noted that the number and the color type of each first sub-pixel 31 or each second sub-pixel may be adjusted according to the design requirement of the display panel 100, and thus are not limited to the examples of the above embodiments. In addition, the arrangement between each of the first sub-pixels 31 and the second sub-pixels 32 is not limited to the example of the above embodiment.

Referring to fig. 4 and 5, in some embodiments, the display panel 100 further includes a pixel defining layer 40 located on a side of the first signal line 21 away from the substrate 10, the pixel defining layer 40 includes a first pixel opening, and the first sub-pixel 31 includes a first light emitting structure 313, a first electrode 311, and a second electrode 312. The first light emitting structure 313 is located in the first pixel opening, the first electrode 311 is located on a side of the first light emitting structure 313 facing the substrate 10, and the second electrode 312 is located on a side of the first light emitting structure 313 facing away from the substrate 10, which is not limited in the present invention. One of the first electrode 311 and the second electrode 312 is an anode, and the other is a cathode.

The second sub-pixel 32 has a similar structure to the first sub-pixel 31, for example, the pixel defining layer 40 further includes a second pixel opening, the second sub-pixel 32 includes a second light emitting structure 323 and a third electrode 321 and a fourth electrode 322, the second light emitting structure 323 is disposed in the second sub-pixel 32 opening, the third electrode 321 is located on a side of the second light emitting structure 323 facing the substrate 10, and the fourth electrode 322 is located on a side of the second light emitting structure 323 facing away from the substrate 10. One of the third electrode 321 and the fourth electrode 322 is an anode, and the other is a cathode.

In this embodiment, the first electrode 311 and the third electrode 321 are anodes, the second electrode 312 and the fourth electrode 322 are cathodes.

In some embodiments, in order to improve the light transmittance of the first display region AA1, the first electrode 311 is a light-transmissive electrode, and optionally, the first electrode 311 includes an Indium Tin Oxide (ITO) layer or an Indium zinc Oxide (ITO) layer.

In some embodiments, the first electrode 311 is a reflective electrode and an area of an orthographic projection of the first electrode 311 on the substrate 10 is smaller than an area of an orthographic projection of the third electrode 321 on the substrate 10, and the first electrode 311 may include 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 constituent material of the second electrode 312 includes magnesium, silver, or a magnesium-silver alloy. The fourth electrode 322 may be formed of the same material as the second electrode 312. In some embodiments, the second and

fourth electrodes

312, 322 may be interconnected as a common electrode.

In some embodiments, the orthographic projection of each first light emitting structure 313 on the substrate 10 is composed of one first pattern unit or is composed of a concatenation of more than two first pattern units, the first pattern units comprising at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd, a rectangle.

In some embodiments, the orthographic projection of each first electrode 311 on the substrate 10 is composed of one second pattern unit or is composed of a concatenation of two or more second pattern units, the second pattern unit including at least one selected from the group consisting of a circle, an ellipse, a dumbbell, a gourd, and a rectangle. With the above arrangement, diffraction of the first display area AA1 can be effectively reduced.

In some embodiments, the display panel 100 further includes a first supporting column 51 and a second supporting column 52 located on a side of the pixel defining layer 40 facing away from the substrate 10, the first supporting column 51 is distributed in the first display area AA1, and the second supporting column 52 is distributed in the second display area AA 2. By arranging the first support column 51 in the first display area AA1 and the second support column 52 in the second display area AA2, on one hand, the first support column 51 and the second support column 52 can prevent the optical mask from scratching the finished films in the display panel 100 when the optical mask is used for evaporation of other structures of the display panel 100. For example, the first and

second support pillars

51 and 52 can prevent the light emitting structure of the sub-pixel from being damaged by a mask when the light emitting structure is prepared. On the other hand, the first support columns 51 and the second support columns 52 can support the display panel 100, and the strength of the display panel 100 can be improved.

In some embodiments, the first pixel circuit 23 may include an active layer 231 on the substrate 10, a gate layer 232 on a side of the active layer 231 facing away from the substrate 10, and a source-drain layer 233 on a side of the gate layer 232 facing away from the substrate 10. Optionally, the first pixel circuit 23 may further include a storage capacitor or the like to better drive the first sub-pixel 31 to display. It is understood that the first pixel circuit 23 and the second pixel circuit 24 have similar structures and are not described in detail.

In summary, according to the display panel 100 of the embodiment of the invention, the display panel 100 has the first display area AA1 capable of transmitting light, so that the photosensitive element 200 can be integrated on the back surface of the first display area AA1 of the display panel 100, and the under-screen integration of the photosensitive element 200 such as a camera is realized, and meanwhile, the first display area AA1 can display a picture, thereby increasing the display area of the display panel 100 and facilitating the realization of the full-screen design of the display device 1000.

Further, the display panel 100 includes a substrate 10 and a first signal line 21 located on the substrate 10 and extending to the first display area AA1, the first signal line 21 includes an auxiliary conductive layer 213 and a transparent conductive layer 214 disposed in a stacked manner and electrically connected to each other, and the resistivity of the auxiliary conductive layer 213 is smaller than that of the transparent conductive layer 214, so that when the first signal line 21 transmits an electric signal, the electrical signal may be transmitted in parallel in the transparent conductive layer 214 and the auxiliary conductive layer 213, so as to effectively reduce the resistance of the first signal line 21 and simultaneously reduce the light blockage of the first signal line 21, effectively improve the display effect of the display panel 100, meanwhile, the width of the orthographic projection of the transparent conductive layer 214 on the substrate 10 is greater than or equal to the width of the orthographic projection of the auxiliary conductive layer 213 on the substrate 10, so that the light transmittance of the first display area AA1 is improved, and the usability of the photosensitive assembly 200 is improved.

Referring to fig. 6 and 7 together, fig. 6 is a schematic structural diagram of a display device according to an embodiment of the invention, and fig. 7 is a cross-sectional view taken along a direction D-D in fig. 6. An embodiment of the present invention further provides a display device 1000, including the display panel 100 according to any of the above embodiments.

In the display device 1000 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 capable of transmitting light, optionally, the display panel 100 may further have a second display area AA2 located at least a portion of an outer peripheral side of the first display area AA1, and a light transmittance of the first display area AA1 is greater than a light transmittance of the second display area AA 2.

The display panel 100 includes a first surface and a second surface opposite to each other, wherein the first surface is a display surface. The display device 1000 further includes a photosensitive assembly 200, the photosensitive assembly 200 is located on the second surface side of the display panel 100, and the photosensitive assembly 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 component 200 is a Complementary Metal Oxide Semiconductor (CMOS) image capture Device, and in some other embodiments, the photosensitive component 200200 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 1000 may further integrate other components, such as an earpiece, a speaker, etc., on the second surface of the display panel 100.

According to the display device 1000 of the embodiment of the invention, the first display area AA1 capable of transmitting light is arranged, so that the display panel 100 can integrate the photosensitive assembly 200 on the back side of the first display area AA1, and the under-screen integration of the photosensitive assembly 200 such as a camera is realized, 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 1000 is realized.

Further, the first signal line 21 of the display panel 100 in the embodiment of the present invention includes the auxiliary conductive layer 213 and the transparent conductive layer 214 that are stacked in a direction away from the substrate 10 and electrically connected to each other, so that electrical signals can be transmitted in parallel in the transparent conductive layer 214 and the auxiliary conductive layer 213, so as to effectively reduce the resistance of the first signal line 21 and reduce the blocking of the first signal line 21 to light, improve the light transmittance of the first display area AA1 and effectively improve the display effect of the display panel 100, and facilitate popularization and application.

For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual value between endpoints of a range is encompassed within the range. In accordance with the above 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 region capable of transmitting light, the display panel comprising:

a substrate;

the first signal line comprises an auxiliary conducting layer and a transparent conducting layer which are arranged in a stacked mode and electrically connected with each other, the transparent conducting layer extends along a preset direction, the auxiliary conducting layer comprises a plurality of conducting blocks arranged at intervals along the preset direction, each conducting block is electrically connected with the transparent conducting layer, the width of the orthographic projection of the transparent conducting layer on the substrate is larger than or equal to the width of the orthographic projection of the auxiliary conducting layer on the substrate, and the resistivity of the auxiliary conducting layer is smaller than the resistivity of the transparent conducting layer.

2. The display panel according to claim 1, wherein the transparent conductive layer is located on a side of the auxiliary conductive layer facing away from the substrate.

3. The display panel according to claim 2, wherein a thickness of the auxiliary conductive layer is greater than or equal to an orthogonal projection width of the auxiliary conductive layer on the substrate.

4. The display panel according to claim 2, wherein the first signal line is at least one of a first scan line and a first data line.

5. The display panel according to claim 1, wherein the display panel further has a second display region having a light transmittance smaller than that of the first display region, the display panel further comprising:

a second signal line on the substrate, at least a portion of the second signal line extending in the second display region,

in the first signal line and the second signal line of the same signal type, the auxiliary conductive layer in the first signal line and the second signal line are arranged in the same layer and have the same material.

6. The display panel according to claim 5, wherein, in the first signal line and the second signal line of the same signal type, a thickness of the auxiliary conductive layer in the first signal line is larger than a thickness of the second signal line.

7. The display panel according to claim 5, wherein the resistance of the first signal line is 0.8 to 1.3 times the resistance of the second signal line of the same signal type per unit extension length.

8. The display panel according to claim 1, wherein a width of an orthogonal projection of the transparent conductive layer on the substrate is 1 to 10 times a width of an orthogonal projection of the auxiliary conductive layer on the substrate.

9. The display panel according to claim 8, wherein a width of an orthogonal projection of the auxiliary conductive layer on the substrate is less than or equal to 800 nm, and a thickness of the auxiliary conductive layer is greater than 50 nm.

10. The display panel according to claim 8, wherein the auxiliary conductive layer has a thickness of 500 nm to 800 nm.

11. The display panel of claim 8, wherein an orthographic width of the transparent conductive layer on the substrate is greater than or equal to 2.5 microns.

12. The display panel according to any one of claims 1 to 11, wherein the resistance of the auxiliary conductive layer is less than or equal to 1/1600 times the resistance of the transparent conductive layer per unit extended length.

13. The display panel according to claim 12, wherein a constituent material of the auxiliary conductive layer comprises a metal, and a constituent material of the transparent conductive layer comprises at least one of indium tin oxide and indium zinc oxide.

14. The display panel according to claim 12, wherein the auxiliary conductive layer comprises a first metal sub-layer, a second metal sub-layer and a third metal sub-layer which are stacked in a direction away from the substrate, the first metal sub-layer and the third metal sub-layer are made of titanium, and the second metal sub-layer is made of aluminum.

15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.