CN111293158B - Display panel and display device - Google Patents

Abstract

The invention discloses a display panel and a display device. The display panel includes at least a first display area, the first display area including: the first substrate is a light-transmitting substrate; a plurality of first pixel units located on one side of the first substrate, the first pixel units including a first red sub-pixel, a first green sub-pixel and a first blue sub-pixel, the first red sub-pixel including a first anode, a first red light emitting layer and a first cathode which are laminated, the first green sub-pixel including a second anode, a first green light emitting layer and a second cathode which are laminated, the first blue sub-pixel including a third anode, a first blue light emitting layer and a third cathode which are laminated; wherein at least a part of the first anode is a transparent anode and/or a part of the first anode is a transparent anode, and the second anode and the third anode are both non-transparent anodes. The invention can ensure the consistency of the whole display effect of the display panel and can also improve the light transmittance of the transparent display area of the display panel.

Description

Display panel and display device

Technical Field

The embodiment of 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 display terminals, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the display terminal is concerned more and more in the industry. In the prior art, a transparent display area is designed, and elements such as a camera and a sensor are arranged in the transparent display area to realize a full-screen. However, the existing full-face screen design cannot simultaneously optimize the light transmittance of the transparent display area and the uniformity of the whole display effect.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a display panel and a display apparatus, so as to ensure uniformity of the overall display effect of the display panel and improve the light transmittance of the transparent display area of the display panel.

In order to realize the purpose, the invention adopts the following technical scheme:

in one aspect, an embodiment of the present invention provides a display panel, which at least includes a first display area, where the first display area includes:

the first substrate is a light-transmitting substrate;

a plurality of first pixel units on one side of the first substrate, the first pixel units including a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel, the first red sub-pixel including a first anode, a first red light emitting layer, and a first cathode that are stacked, the first green sub-pixel including a second anode, a first green light emitting layer, and a second cathode that are stacked, the first blue sub-pixel including a third anode, a first blue light emitting layer, and a third cathode that are stacked;

wherein at least a portion of the first anode is a transparent anode and/or a portion of the first anode is a transparent anode, and the second anode and the third anode are both non-transparent anodes.

Optionally, the material of the transparent anode comprises a metal oxide;

preferably, the material of the transparent anode includes at least one of indium tin oxide, indium zinc oxide, silver-doped indium tin oxide, and silver-doped indium zinc oxide.

Optionally, the first display region further includes a plurality of pixel driving circuits on the first substrate, the pixel driving circuits include a first pixel driving circuit, a second pixel driving circuit and a third pixel driving circuit, the first pixel driving circuit is electrically connected to the first anode, the second pixel driving circuit is electrically connected to the second anode, and the third pixel driving circuit is electrically connected to the third anode;

the first pixel driving circuit is overlapped with a non-transparent anode of the first anode along the thickness direction of the display panel;

preferably, in a thickness direction of the display panel, a non-transparent anode of the first anode completely covers the first pixel driving circuit;

preferably, in a thickness direction of the display panel, the second anode completely covers the second pixel driving circuit, and/or the third anode completely covers the third pixel driving circuit.

Optionally, at least two of the first anodes share one of the first pixel driving circuits.

Optionally, at least one of the at least two first anodes sharing one of the first pixel driving circuits is a transparent anode.

Optionally, the first display region further includes a scan line and a data line, the pixel driving circuit includes a thin film transistor, and the thin film transistor includes a gate, a source, and a drain;

the scanning line is electrically connected with the grid electrode, the data line is electrically connected with the source electrode or the drain electrode, and the scanning line and/or the data line are/is a transparent conductive line;

preferably, the scan line and the transparent anode are located on the same layer and have the same material, and/or the data line and the source electrode or the drain electrode are located on the same layer;

preferably, the material of the scan line and/or the data line is indium tin oxide.

Optionally, the transparent anodes of at least some of the first anodes have different structures, wherein the structure of the transparent anodes includes at least one of the size of the transparent anodes, the shape of the transparent anodes, and the position of the transparent anodes in the corresponding first anodes;

preferably, the transparent anodes of any two adjacent first anodes have different structures.

Optionally, the plurality of first pixel units include a first type of pixel unit and a second type of pixel unit which are adjacent to each other, a first anode in the first type of pixel unit is a transparent anode, a first anode in the second type of pixel unit is a non-transparent anode, and the first type of pixel unit and the second type of pixel unit are arranged along a first direction;

preferably, the first type pixel units and the second type pixel units are arranged along a second direction, and the second direction intersects with the first direction.

Optionally, the display panel further comprises two display regions, the second display region comprising:

a second substrate; a plurality of second pixel units located on one side of the second substrate, wherein each second pixel unit comprises a second red sub-pixel, a second green sub-pixel and a second blue sub-pixel, each second red sub-pixel comprises a fourth anode, a second red light-emitting layer and a fourth cathode which are laminated, each second green sub-pixel comprises a fifth anode, a second green light-emitting layer and a fifth cathode which are laminated, each second blue sub-pixel comprises a sixth anode, a second blue light-emitting layer and a sixth cathode which are laminated, and each fourth anode, each fifth anode and each sixth anode are non-transparent anodes;

preferably, the second red sub-pixel, the second green sub-pixel and the second blue sub-pixel emit light in an active driving manner;

preferably, the first anode, the second anode, the third anode, the fourth anode, the fifth anode and the sixth anode are all block-shaped electrodes, and the first cathode, the second cathode, the third cathode, the fourth cathode, the fifth cathode and the sixth cathode constitute a surface electrode;

preferably, the second display area completely or partially surrounds the first display area;

preferably, the second substrate and the first substrate are spliced, or the second substrate and the first substrate are of an integral structure;

preferably, the display panel further includes a polarizer at least located in the second display region, and the polarizer is located on a side of the second pixel unit away from the second substrate.

In another aspect, an embodiment of the present invention provides a display device, including:

the display panel provided by the embodiment of the invention comprises a photosensitive device and a display panel;

the photosensitive device is located below the first display area of the display panel and used for transmitting or collecting light through the first display area.

The beneficial effects of the invention are: the display panel provided by the invention has the advantages that the light transmission area of the first display area is increased by setting a part of the anode of at least part of the red sub-pixels of the first display area (namely, the transparent display area) as the transparent anode and/or setting the anode of part of the red sub-pixels of the first display area as the transparent anode, so that the light transmission rate of the first display area is increased, and the color coordinates of the red sub-pixels of the first display area are ensured to be basically the same as the color coordinates of the red sub-pixels of the main display area (the second display area) by setting at least part of the anode of the red sub-pixels as the transparent anode; meanwhile, the anode of the green sub-pixel and the anode of the blue sub-pixel of the first display area are set to be non-transparent anodes, so that the color coordinate of the green sub-pixel of the first display area is the same as that of the green sub-pixel of the main display area, and the color coordinate of the blue sub-pixel of the first display area is the same as that of the blue sub-pixel of the main display area, and the consistency of the display effects of the first display area and the main display area is guaranteed. Therefore, the embodiment of the invention can improve the light transmittance of the transparent display area of the display panel under the condition of ensuring the consistency of the whole display effect of the display panel.

Drawings

The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

fig. 1 is a schematic diagram of an anode structure of each sub-pixel in a first display area of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a display panel along the direction A1-A2 in FIG. 1;

FIG. 3 is a schematic diagram of an anode structure of each sub-pixel in a first display area of another display panel according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a display panel along the direction B1-B2 in FIG. 3;

FIG. 5 is a schematic cross-sectional view of another display panel along the direction A1-A2 in FIG. 1;

FIG. 6 is a schematic diagram of an anode structure of each sub-pixel in the first display area of another display panel according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the display panel along the direction C1-C2 in FIG. 6;

FIG. 8 is a schematic diagram illustrating an anode structure of each sub-pixel in the first display area of another display panel according to an embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating an anode structure of each sub-pixel in the first display area of another display panel according to an embodiment of the invention;

FIG. 10 is a schematic diagram illustrating an anode structure of each sub-pixel in the first display area of another display panel according to an embodiment of the invention;

FIG. 11 is a schematic diagram illustrating an anode structure of each sub-pixel in the first display area of another display panel according to an embodiment of the invention;

FIG. 12 is a schematic diagram illustrating an anode structure of each sub-pixel in the first display area of another display panel according to an embodiment of the invention;

fig. 13 is a schematic plan view illustrating a display panel according to an embodiment of the present invention;

fig. 14 is a schematic plan view of a display device according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As described in the background, the prior art full-screen design has a problem that the transmittance of the transparent display area and the uniformity of the overall display effect cannot be optimized simultaneously. The inventor finds that, in order to realize a full-screen, the display panel needs to be directly covered on a photosensitive device such as a camera, and this requires that the display panel located above the photosensitive device such as the camera has high light transmittance, i.e., the transparent display area has high light transmittance. Therefore, the anode of each sub-pixel located in the transparent display region is set to be a transparent anode to increase the light transmission area, thereby improving the light transmittance. However, in order to improve the display effect of the main display area, the anode of each sub-pixel located in the main display area is set as a non-transparent anode, and the transparent anode and the non-transparent anode may have different influences on the light emission spectra of the sub-pixels of different colors, so that there is a color gamut difference between the transparent display area and the main display area, thereby causing the display effect of the transparent display area and the main display area to be inconsistent. In addition, in order to improve the consistency of the display effect of the transparent display area and the main display area, the anode of each sub-pixel of the transparent display area is set to be a non-transparent anode with a small size, but the proposal sacrifices 10% to 20% of light transmittance.

In view of the above problems, the inventors have found that the color coordinates of the red sub-pixel having the transparent anode are substantially the same as the color coordinates of the red sub-pixel having the non-transparent anode, while the color coordinates of the green sub-pixel having the transparent anode are different from the color coordinates of the green sub-pixel having the non-transparent anode by a relatively large amount, and the color coordinates of the blue sub-pixel having the transparent anode are different from the color coordinates of the blue sub-pixel having the non-transparent anode by a relatively large amount. Accordingly, an embodiment of the present invention provides a display panel, which at least includes a first display area, where the first display area includes: the first substrate is a light-transmitting substrate; a plurality of first pixel units located on one side of the first substrate, the first pixel units including a first red sub-pixel, a first green sub-pixel and a first blue sub-pixel, the first red sub-pixel including a first anode, a first red light emitting layer and a first cathode which are laminated, the first green sub-pixel including a second anode, a first green light emitting layer and a second cathode which are laminated, the first blue sub-pixel including a third anode, a first blue light emitting layer and a third cathode which are laminated; wherein at least a part of the first anode is a transparent anode and/or a part of the first anode is a transparent anode, and the second anode and the third anode are both non-transparent anodes.

In the technical scheme, the first display area is a transparent display area, the display panel can only comprise the first display area, and the display panel can be used as an auxiliary screen and spliced with a main screen with a main display area to form a full-screen; the display panel may also include both the first display area and the main display area (second display area), i.e., the display panel itself may constitute a full-screen. This technical scheme is through setting up partly a part of at least part first positive pole into transparent positive pole, and/or partly first positive pole sets up to transparent positive pole to all set up second positive pole and third positive pole into non-transparent positive pole, can improve the luminousness in the transparent display area of display panel under the condition of guaranteeing the whole display effect uniformity of display panel.

Based on the above technical solutions, in an embodiment of the present invention, fig. 1 is a schematic diagram of an anode structure of each sub-pixel in a first display area of a display panel according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view of a display panel along a direction A1-A2 in fig. 1. As shown in fig. 1 and fig. 2, the display panel of the present embodiment at least includes a first display area 100, and the first display area 100 includes: a first substrate 1, wherein the first substrate 1 is a light-transmitting substrate; a plurality of first pixel units 2 on one side of the first substrate 1, the first pixel units 2 including a first red sub-pixel 10, a first green sub-pixel 20, and a first blue sub-pixel 30, the first red sub-pixel 10 including a first anode 11, a first red light emitting layer 12, and a first cathode 13 that are stacked, the first green sub-pixel 20 including a second anode 21, a first green light emitting layer 22, and a second cathode 23 that are stacked, the first blue sub-pixel 30 including a third anode 31, a first blue light emitting layer 32, and a third cathode 33 that are stacked; in this case, a part of part or all of the first anodes 11 is transparent anodes (fig. 1 exemplarily shows that a part of all of the first anodes 11 is transparent anodes), that is, the region Z1 of the first anodes 11 shown in fig. 1 is transparent anodes, the region Z2 is non-transparent anodes, and both the second anodes 21 and the third anodes 31 are non-transparent anodes.

In the present embodiment, by setting a part of part or all of the first anode 11 as a transparent anode, the light transmission area of the first display region 100 is increased, thereby increasing the light transmittance of the first display region; meanwhile, since the color coordinate of the red sub-pixel with the transparent anode is substantially the same as the color coordinate of the red sub-pixel with the non-transparent anode, when the display panel of the embodiment is applied to a full-screen display with a transparent display area, the color coordinate of the first red sub-pixel can be substantially the same as the color coordinate of the red sub-pixel with the non-transparent anode of the main display area. In addition, since the color coordinate of the green sub-pixel with the transparent anode has a larger difference with the color coordinate of the green sub-pixel with the non-transparent anode, and the color coordinate of the blue sub-pixel with the transparent anode has a larger difference with the color coordinate of the blue sub-pixel with the non-transparent anode, in this embodiment, by setting both the second anode 21 and the third anode 31 as the non-transparent anodes, the color coordinate of the first green sub-pixel can be made the same as the color coordinate of the green sub-pixel with the non-transparent anode in the main display area, and the color coordinate of the first blue sub-pixel can be made the same as the color coordinate of the blue sub-pixel with the non-transparent anode in the main display area, so that the color gamut difference between the first display area and the main display area can be balanced, and the uniformity of the whole display effect can be ensured.

In another embodiment of the present invention, fig. 3 is a schematic diagram illustrating an anode structure of each sub-pixel in the first display area of another display panel provided in the embodiment of the present invention; fig. 4 is a schematic cross-sectional view of the display panel along the direction B1-B2 in fig. 3. As shown in fig. 3 and 4, the display panel of the present embodiment at least includes a first display area 100, and the first display area 100 includes: a first substrate 1, wherein the first substrate 1 is a light-transmitting substrate; a plurality of first pixel units 2 on one side of the first substrate 1, the first pixel units 2 including a first red sub-pixel 10, a first green sub-pixel 20, and a first blue sub-pixel 30, the first red sub-pixel 10 including a first anode 11, a first red light emitting layer 12, and a first cathode 13 that are stacked, the first green sub-pixel 20 including a second anode 21, a first green light emitting layer 22, and a second cathode 23 that are stacked, the first blue sub-pixel 30 including a third anode 31, a first blue light emitting layer 32, and a third cathode 33 that are stacked; wherein, part of the first anodes 11 are transparent anodes (fig. 1 exemplarily shows that 3 first anodes 11 are transparent anodes and 1 first anode 11 is a non-transparent anode), and both the second anode 21 and the third anode 31 are non-transparent anodes.

The present embodiment increases the light transmission area of the first display region 100 by setting a portion of the first anode 11 as a transparent anode, thereby increasing the light transmittance of the first display region; meanwhile, since the color coordinate of the red sub-pixel with the transparent anode is substantially the same as the color coordinate of the red sub-pixel with the non-transparent anode, when the display panel of the embodiment is applied to a full-screen display with a transparent display area, the color coordinate of the first red sub-pixel can be substantially the same as the color coordinate of the red sub-pixel with the non-transparent anode of the main display area. In addition, since the color coordinate of the green sub-pixel with the transparent anode has a larger difference with the color coordinate of the green sub-pixel with the non-transparent anode, and the color coordinate of the blue sub-pixel with the transparent anode has a larger difference with the color coordinate of the blue sub-pixel with the non-transparent anode, in this embodiment, by setting both the second anode 21 and the third anode 31 as the non-transparent anodes, the color coordinate of the first green sub-pixel can be made the same as the color coordinate of the green sub-pixel with the non-transparent anode in the main display area, and the color coordinate of the first blue sub-pixel can be made the same as the color coordinate of the blue sub-pixel with the non-transparent anode in the main display area, so that the color gamut difference between the first display area and the main display area can be balanced, and the uniformity of the whole display effect can be ensured.

In the embodiment of the invention, the first substrate 1 may provide buffering, protection, or support for the display device. The first substrate 1 may be a flexible substrate or a rigid substrate. The material of the flexible substrate may be Polyimide (PI), and the material of the rigid substrate may be glass.

The material of the transparent anode comprises a metal oxide, optionally at least one of Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), aluminum Zinc Oxide (AZO), silver-doped indium tin oxide, and silver-doped indium zinc oxide; the material of the non-transparent anode may be a metal, such as silver or copper; the material of the first cathode 13, the second cathode 23 and the third cathode 33 may be indium tin oxide or magnesium silver alloy; the first red light-emitting layer 12, the first green light-emitting layer 22, and the first blue light-emitting layer 32 may be organic light-emitting layers, wherein the organic light-emitting layers may include only a single-layer structure, for example, only an organic light-emitting material layer; the organic light emitting layer may further include a multilayer structure, for example, the organic light emitting layer may include functional film layers such as a hole injection layer, a hole transport layer, an organic light emitting material layer, an electron transport layer, and an electron injection layer, which are sequentially stacked, and a specific structure of the organic light emitting layer is set according to an actual application, and is not specifically limited herein. In addition, the first red sub-pixel 10, the first green sub-pixel 20, and the first blue sub-pixel 30 in the embodiment of the present invention may emit light in a passive driving manner or in an active driving manner.

The inventors experimentally verified that when the material of the selected transparent anode is a metal oxide such as indium tin oxide, and the material of the non-transparent anode is a metal such as silver or copper, the color coordinates of the red subpixel having the non-transparent anode are (0.673, 0.324), the color coordinates of the red subpixel having the transparent anode are (0.680, 0.314), the color coordinates of the green subpixel having the non-transparent anode are (0.221, 0.730), the color coordinates of the green subpixel having the transparent anode are (0.371, 0.598), the color coordinates of the blue subpixel having the non-transparent anode are (0.139, 0.051), and the color coordinates of the green subpixel having the transparent anode are (0.144, 0.148). It was thus verified that the color coordinates of the red sub-pixel with the transparent anode and the color coordinates of the red sub-pixel with the non-transparent anode are substantially the same, whereas the color coordinates of the green sub-pixel with the transparent anode and the green sub-pixel with the non-transparent anode differ greatly, and the color coordinates of the blue sub-pixel with the transparent anode and the blue sub-pixel with the non-transparent anode differ greatly. Therefore, the technical scheme of the implementation of the invention can effectively ensure the consistency of the whole display effect.

It should be noted that fig. 1 and fig. 3 only show exemplary anode structures (such as size, shape, number, and arrangement of the anode) that can be implemented, and do not limit the anode structure of the present invention.

In another embodiment of the present invention, the first red sub-pixel, the first green sub-pixel and the first blue sub-pixel in the embodiment of the present invention emit light in an active driving manner. Optionally, the first display region further includes a plurality of pixel driving circuits on the first substrate, the pixel driving circuits include a first pixel driving circuit, a second pixel driving circuit and a third pixel driving circuit, the first pixel driving circuit is electrically connected to the first anode, the second pixel driving circuit is electrically connected to the second anode, and the third pixel driving circuit is electrically connected to the third anode; the first pixel driving circuit overlaps a non-transparent anode of the first anode in a thickness direction of the display panel.

Specifically, as shown in fig. 1 and fig. 5, the first display area 100 further includes a plurality of pixel driving circuits on the first substrate 1, that is, the first substrate 1 is an array substrate, the pixel driving circuits include a first pixel driving circuit 41, a second pixel driving circuit 42 and a third pixel driving circuit 43, the first pixel driving circuit 41 is electrically connected to the first anode 11 of the first red sub-pixel 10 to drive the first red sub-pixel 10 to emit light, the second pixel driving circuit 42 is electrically connected to the second anode 21 of the first green sub-pixel 20 to drive the first green sub-pixel 20 to emit light, and the third pixel driving circuit 43 is electrically connected to the third anode 31 of the first blue sub-pixel 30 to drive the first blue sub-pixel 30 to emit light; the first pixel driving circuit 41 overlaps the non-transparent anode of the first anode 11 along the thickness direction of the display panel, so that at least a portion of the first pixel driving circuit 41 can be shielded by the non-transparent anode of the first anode 11, thereby reducing the area of the light-transmitting region occupied by the first pixel driving circuit 41, and the first pixel driving circuit 41 generally includes a film layer such as a metal layer for reducing light transmittance, and then the light transmittance of the first display region 100 can be increased or the light transmittance of the first display region 100 can be prevented from being reduced by overlapping the first pixel driving circuit 41 and the non-transparent anode of the first anode 11.

Preferably, the non-transparent anode of the first anode 11 completely covers the first pixel driving circuit 41 in the thickness direction of the display panel. Thereby, the light transmittance of the first display region 100 may be further increased.

Preferably, the second anode 21 completely covers the second pixel driving circuit 42 and/or the third anode 31 completely covers the third pixel driving circuit 43 in the thickness direction of the display panel. Thereby, the light transmittance of the first display region 100 may be further increased.

Based on the above embodiments, in yet another embodiment of the present invention, at least two first anodes share one first pixel driving circuit. On one hand, the number of the first pixel driving circuits can be reduced, the process cost can be reduced, and the circuit design space can be increased, and on the other hand, more non-transparent anodes of the first anodes can be set as transparent anodes, so that the light transmission area can be further increased, and the light transmittance of the first display area 100 can be improved.

In a preferred embodiment of the present invention, at least one of the at least two first anodes sharing one first pixel driving circuit is a transparent anode. Illustratively, as shown in fig. 6 and 7, a part of one of the first anodes 11 is a non-transparent anode, and the other first anode 11 is a transparent anode; the two first anodes 11 share a first pixel driving circuit 41, and referring to fig. 7, a first pixel driving circuit 41 is disposed under the non-transparent anode of one first anode 11, and the first pixel driving circuit 41 is not disposed under the other first anode 11, and the first anode 11 is electrically connected to the first pixel driving circuit 41 under the previous first anode 11 (not shown, the first pixel driving circuit 41 can be electrically connected to the other first anode 11 through a conductive line and a via). Therefore, the number of the first pixel driving circuits is reduced, the process cost is reduced, the circuit design space is increased, more non-transparent anodes of the first anodes can be set as transparent anodes, the light transmission area is further increased, and the light transmittance of the first display area 100 is improved.

Optionally, the first display region further includes a scan line and a data line, the pixel driving circuit includes a thin film transistor, and the thin film transistor includes a gate, a source, and a drain; the scanning line is electrically connected with the grid electrode, the data line is electrically connected with the source electrode or the drain electrode, and the scanning line and/or the data line are/is transparent conductive lines. Therefore, the blocking of the scanning lines and/or the data lines to light can be avoided, and the light transmittance of the first display area is further improved.

Preferably, the scan line and the transparent anode are located at the same layer and have the same material, and/or the data line and the source electrode or the drain electrode are located at the same layer.

Illustratively, the material of the scan line and/or the data line may be indium tin oxide. Considering that if the scan line and the gate of the tft are located in the same layer, since the gate is made of metal, and the scan line in this embodiment is made of transparent conductive material, it is necessary to use two masks to form the gate and the scan line respectively, and the scan line and the transparent anode are located in the same layer and made of the same material, and the via hole connecting the scan line and the gate can be formed in the etching process of the via hole connecting the first anode and the first driving pixel circuit. In addition, the data line and the source electrode or the drain electrode are positioned on the same layer, so that an etching and punching process can be avoided, the process procedure is further saved, and the process cost is reduced.

Optionally, based on the above technical solution, in another embodiment of the present invention, the transparent anodes of at least some of the first anodes have different structures, where the structure of the transparent anode includes at least one of the size of the transparent anode, the shape of the transparent anode, and the position of the transparent anode in the corresponding first anode. Therefore, for at least a part of the first anode being a transparent anode, the present embodiment destroys the periodic arrangement of the sub-pixels (or anodes) in the first display area by setting at least one of the size of the transparent anode, the shape of the transparent anode, and the position of the transparent anode in the corresponding first anode to be different, thereby reducing the diffraction effect of the first display area, improving the photosensitive effect of the photosensitive device, such as improving the imaging quality of the camera.

Illustratively, as shown in fig. 8, the transparent anodes (illustrated as regions Z1) of the respective first anodes 11 are different in size; alternatively, as shown in fig. 9, the transparent anodes (shown as regions Z1) of the first anodes 11 are different in shape; alternatively, as shown in fig. 10, the transparent anode (illustrated region Z1) of each first anode 11 is different in position in the corresponding first anode 11. Therefore, the ratio of the energy of the 1 st order diffraction spot to the energy of the 0 th order diffraction spot can be reduced from 0.3 to 0.001, so that the energy is more concentrated on the geometric image point, and the diffraction effect is reduced.

Preferably, the transparent anodes of any two adjacent first anodes have different structures. Therefore, the periodic arrangement of the sub-pixels (or the anodes) in the first display area can be completely destroyed, and the diffraction effect of the first display area is effectively reduced.

Optionally, the plurality of first pixel units include a first type of pixel unit and a second type of pixel unit that are adjacent to each other, a first anode in the first type of pixel unit is a transparent anode, a first anode in the second type of pixel unit is a non-transparent anode, and the first type of pixel unit and the second type of pixel unit are arranged along the first direction. Therefore, for the case that part of the first anodes are transparent anodes, in the present embodiment, by disposing two adjacent first pixel units, the first anode of one first pixel unit is a transparent anode, and the first anode of the other first pixel unit is a non-transparent anode, the periodic arrangement of the sub-pixels (or anodes) in the first display region is destroyed, so as to reduce the diffraction effect of the first display region.

Illustratively, as shown in fig. 11, the plurality of first pixel units include a first type pixel unit 211 and a second type pixel unit 212 which are adjacent to each other, the first anode 11 in the first type pixel unit 211 is a transparent anode, the first anode 11 in the second type pixel unit 212 is a non-transparent anode, and the first type pixel unit 211 and the second type pixel unit 212 are arranged along the first direction Y.

Preferably, as shown in fig. 12, the first-type pixel units 211 and the second-type pixel units 212 are simultaneously arranged along a second direction X, which intersects the first direction Y. Therefore, the periodic arrangement of the sub-pixels (or the anodes) in the first display area can be further destroyed, and the diffraction effect of the first display area is effectively reduced.

Optionally, in another embodiment of the present invention, fig. 13 is a schematic plan view of a display panel provided in an embodiment of the present invention. As shown in fig. 13, the display panel further includes two display regions 200, and the second display region 200 includes:

a second substrate; the second pixel units are positioned on one side of the second substrate and comprise a second red sub-pixel, a second green sub-pixel and a second blue sub-pixel, the second red sub-pixel comprises a fourth anode, a second red light-emitting layer and a fourth cathode which are laminated, the second green sub-pixel comprises a fifth anode, a second green light-emitting layer and a fifth cathode which are laminated, the second blue sub-pixel comprises a sixth anode, a second blue light-emitting layer and a sixth cathode which are laminated, and the fourth anode, the fifth anode and the sixth anode are non-transparent anodes.

Optionally, the second red sub-pixel, the second green sub-pixel and the second blue sub-pixel emit light in an active driving manner.

Optionally, the first anode, the second anode, the third anode, the fourth anode, the fifth anode and the sixth anode are all block-shaped electrodes, and the first cathode, the second cathode, the third cathode, the fourth cathode, the fifth cathode and the sixth cathode constitute a surface electrode.

Optionally, the second display area completely or partially surrounds the first display area. The first display area may be rectangular, or may be in a shape of a drop, a circle, a trapezoid, a bar, or a shape and a size corresponding to the status bar when the display panel displays, and the invention is not limited herein. The display panel provided by the embodiment can realize full-screen display.

Optionally, the second substrate and the first substrate are spliced together, or the second substrate and the first substrate are an integral structure. In this embodiment, the second substrate may be a flexible substrate, a rigid substrate, a transparent substrate, or a non-transparent substrate. In addition, the second substrate and the first substrate may be an integrated structure, and the second display region 200 and the first display region 100 are formed on the second substrate and the first substrate, respectively, or may be different substrate structures, and when the whole display panel structure is formed, the second substrate and the first substrate are spliced.

Optionally, the light transmittance of the first display region is greater than 70%.

Optionally, the display panel further includes a polarizer at least in the second display region, and the polarizer is located on a side of the second pixel unit away from the second substrate.

The embodiment of the invention also provides a display device which can be a mobile phone, a computer, an intelligent watch, an intelligent bracelet and other equipment. Fig. 14 is a schematic plan view of a display device according to an embodiment of the present invention, and as shown in fig. 14, the display device includes:

the photosensitive device 300 and the display panel provided by the embodiment of the present invention;

the light sensing device 300 is located below the first display area 100 of the display panel, and is used for emitting or collecting light through the first display area 100. Alternatively, the photosensitive device 300 may include: a camera and/or a light sensor; the light sensor includes: one or a combination of an iris recognition sensor and a fingerprint recognition sensor.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. A display panel comprising at least a first display region, the first display region comprising:

the first substrate is a light-transmitting substrate;

a plurality of first pixel units on one side of the first substrate, the first pixel units including a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel, the first red sub-pixel including a first anode, a first red light emitting layer, and a first cathode that are stacked, the first green sub-pixel including a second anode, a first green light emitting layer, and a second cathode that are stacked, the first blue sub-pixel including a third anode, a first blue light emitting layer, and a third cathode that are stacked;

wherein at least a portion of the first anode is a transparent anode and/or a portion of the first anode is a transparent anode, and the second anode and the third anode are both non-transparent anodes;

the first display region further comprises a plurality of pixel driving circuits on the first substrate, the pixel driving circuits comprise a first pixel driving circuit, a second pixel driving circuit and a third pixel driving circuit, the first pixel driving circuit is electrically connected with the first anode, the second pixel driving circuit is electrically connected with the second anode, and the third pixel driving circuit is electrically connected with the third anode;

the first pixel driving circuit overlaps a non-transparent anode of the first anode in a thickness direction of the display panel.

2. The display panel according to claim 1, wherein a material of the transparent anode comprises a metal oxide.

3. The display panel according to claim 2, wherein a material of the transparent anode comprises at least one of indium tin oxide, indium zinc oxide, silver-doped indium tin oxide, and silver-doped indium zinc oxide.

4. The display panel according to claim 1, wherein a non-transparent anode of the first anode completely covers the first pixel driving circuit in a thickness direction of the display panel;

the second anode completely covers the second pixel driving circuit and/or the third anode completely covers the third pixel driving circuit in a thickness direction of the display panel.

5. The display panel according to claim 1, wherein at least two of the first anodes share one of the first pixel driving circuits.

6. The display panel according to claim 5, wherein at least one of the at least two first anodes that share one of the first pixel driving circuits is a transparent anode.

7. The display panel according to claim 1, wherein the first display region further includes scan lines and data lines, the pixel driving circuit includes thin film transistors including a gate electrode, a source electrode, and a drain electrode;

the scanning line is electrically connected with the grid electrode, the data line is electrically connected with the source electrode or the drain electrode, and the scanning line and/or the data line are/is a transparent conductive line.

8. The display panel according to claim 7, wherein the scan lines and the transparent anode are in the same layer and are made of the same material, and/or the data lines and the source electrode or the drain electrode are in the same layer.

9. The display panel according to claim 8, wherein a material of the scan line and/or the data line is indium tin oxide.

10. The display panel of claim 1, wherein the transparent anodes of at least some of the first anodes have different structures, wherein the structure of the transparent anodes comprises at least one of the size of the transparent anodes, the shape of the transparent anodes, and the position of the transparent anodes in the corresponding first anodes.

11. The display panel according to claim 10, wherein the transparent anode of any two adjacent first anodes has a different structure.

12. The display panel according to claim 1, wherein the plurality of first pixel units comprise a first type of pixel unit and a second type of pixel unit which are adjacent to each other, the first anode in the first type of pixel unit is a transparent anode, the first anode in the second type of pixel unit is a non-transparent anode, and the first type of pixel unit and the second type of pixel unit are arranged along a first direction.

13. The display panel according to claim 12, wherein the first type of pixel unit and the second type of pixel unit are arranged along a second direction, and the second direction intersects with the first direction.

14. The display panel according to claim 1, wherein the display panel further comprises a second display region, the second display region comprising:

a second substrate; the second pixel units are positioned on one side of the second substrate and comprise a second red sub-pixel, a second green sub-pixel and a second blue sub-pixel, the second red sub-pixel comprises a fourth anode, a second red light-emitting layer and a fourth cathode which are laminated, the second green sub-pixel comprises a fifth anode, a second green light-emitting layer and a fifth cathode which are laminated, the second blue sub-pixel comprises a sixth anode, a second blue light-emitting layer and a sixth cathode which are laminated, and the fourth anode, the fifth anode and the sixth anode are non-transparent anodes.

15. A display device, comprising: a light sensing device and a display panel as claimed in any one of claims 1-14;

the photosensitive device is located below a first display area of the display panel and used for transmitting or collecting light through the first display area.

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