CN114068667A - Display substrate and display device - Google Patents

Abstract

The present disclosure provides a display substrate having a plurality of light emitting regions, at least a portion of the light emitting regions including a first light emitting region and a second light emitting region; the display substrate comprises a substrate and a light-emitting device arranged on the substrate and positioned in a light-emitting area; the light emitted by the light-emitting device in the first light-emitting area is transmitted along a first direction, the light emitted by the light-emitting device in the second light-emitting area is transmitted at least along a second direction, the first direction is a direction from the substrate to the light-emitting device, and the second direction is a direction from the light-emitting device to the substrate; the display substrate further comprises a photosensitive device arranged on one side of the substrate, which is far away from the light-emitting device; the light emitted by the light emitting device in the second light emitting area along the second direction can irradiate the photosensitive device. The present disclosure also provides a display device.

Description

Display substrate and display device

Technical Field

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

Background

When a current flows through an Organic Light-Emitting diode (OLED), holes generated at an anode and electrons generated at a cathode are recombined at a Light-Emitting layer and emit Light, and photons with different energies can be emitted according to different excitation energies, so that Light with different colors can be emitted. The organic light-emitting display panel using the OLED device as a display material has the advantages of self-luminescence, wide viewing angle, high contrast and the like, is widely applied to products such as mobile phones, televisions, notebook computers and the like, and is a research focus of numerous scholars at home and abroad at present due to the characteristics of light weight, thin thickness and bending resistance.

Disclosure of Invention

The present disclosure is directed to at least one of the technical problems of the prior art, and provides a display substrate and a display device.

In order to achieve the above object, in a first aspect, the present disclosure provides a display substrate having a plurality of light emitting regions, at least some of the light emitting regions including a first light exiting region and a second light exiting region;

the display substrate includes: the substrate base plate is arranged on the substrate base plate and is positioned on the light-emitting device of the light-emitting area; the light emitted by the light-emitting device in the first light-emitting area propagates along a first direction, the light emitted by the light-emitting device in the second light-emitting area propagates at least along a second direction, the first direction is a direction from the substrate to the light-emitting device, and the second direction is a direction from the light-emitting device to the substrate;

the display substrate further includes: the photosensitive device is arranged on one side, away from the light-emitting device, of the substrate base plate; the light emitted by the light emitting device in the second light emitting area along the second direction can irradiate the photosensitive device.

In some embodiments, one of the light emitting regions corresponds to one sub-pixel; each of the sub-pixels includes a pixel circuit including at least a switching transistor, a driving transistor, and a storage capacitor, and the light emitting device.

In some embodiments, the light emitting device includes a cathode, a first anode, and an organic functional layer disposed between the cathode and the first anode; the first anode is electrically connected with the driving transistor;

for a sub-pixel comprising the first light-emitting area and the second light-emitting area, the orthographic projection of the driving transistor on the light-emitting side is positioned in the first light-emitting area.

In some embodiments, the light emitting device further comprises: and the second anode is arranged between the organic functional layer and the first anode, corresponds to the first light emergent region and is a reflective anode.

In some embodiments, the display substrate further comprises: an encapsulation layer and a shielding layer;

the packaging layer is positioned on one side of the cathode, which is far away from the substrate base plate;

the shielding layer is positioned on one side of the packaging layer, which is far away from the substrate base plate; the light emitted by the light-emitting device in the second light-emitting area also propagates along the first direction, and the shielding layer comprises a shielding part which is arranged corresponding to the second light-emitting area.

In some embodiments, the light emitting regions have a plurality of color types, all of the light emitting regions in at least one color type including the first light exit region and the second light exit region.

In some embodiments, an area of an orthographic projection of the second light exiting region on the substrate is smaller than an area of an orthographic projection of the first light exiting region on the substrate.

In some embodiments, the display substrate further comprises: a pixel defining layer; the pixel defining layer defines the light emitting area;

for a light emitting region including the first light exit region and the second light exit region, the pixel defining layer includes a first pixel defining portion; the first pixel limiting portion defines the first light emitting area, and the first pixel limiting portion and the second pixel limiting portion of the adjacent light emitting area define the second light emitting area together.

In some embodiments, the display substrate further comprises: a light-shielding layer;

the light shielding layer is positioned between the substrate and the light-emitting device;

the light-shielding layer includes: and the opening corresponds to the second light emergent area.

In a second aspect, an embodiment of the present disclosure further provides a display device, including: a display substrate as claimed in any one of the preceding embodiments.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure;

fig. 2 is a schematic structural diagram of another display substrate provided in the embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another display substrate according to an embodiment of the disclosure;

fig. 4 is a schematic structural diagram of another display substrate according to an embodiment of the disclosure;

fig. 5 is a cross-sectional view of a driving transistor and a light emitting device provided by an embodiment of the present disclosure;

fig. 6 is a cross-sectional view of another driving transistor and light emitting device provided by an embodiment of the present disclosure;

fig. 7 is a cross-sectional view of still another driving transistor and light emitting device provided by an embodiment of the present disclosure.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present disclosure, the following describes the display substrate and the display device provided in the present disclosure in detail with reference to the accompanying drawings.

Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element, component, or module discussed below could be termed a second element, component, or module without departing from the teachings of the present disclosure.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the transistors used in the embodiments of the present disclosure may be thin film transistors or field effect transistors or other devices having the same and similar characteristics, and since the source and the drain of the transistors used are symmetrical, there is no difference between the source and the drain. In addition, the transistors can be divided into N-type and P-type according to the characteristics of the transistors, and in the following embodiments, the N-type transistors are used, when the N-type transistors are used, the source and drain are turned on when the gate of the N-type transistors inputs a high level, and the P-type transistors are opposite. It is contemplated that implementation with P-type transistors will be readily apparent to those skilled in the art without inventive effort and, thus, are within the scope of the disclosed embodiments.

It should be noted that, in the embodiments of the present disclosure, the light emitting device includes, but is not limited to, an organic electroluminescent diode OLED, and the following description takes the light emitting device as an OLED as an example. It should be noted that the organic electroluminescent diode OLED is divided into a top emission type and a bottom emission type according to the light emission direction; among them, the organic electroluminescent diode of the bottom emission type emits light through the substrate side, and the cathode of the organic electroluminescent diode of this structure generally uses a metal material as a reflective electrode. The light of the top emission type light emitting diode is emitted from the cathode, although the cathode of the organic electroluminescent diode with this structure may also be made of a metal material, a thin metal material needs to be deposited as the cathode so that the light can be emitted from the cathode, and accordingly, the anode of the organic electroluminescent diode with this structure may be a reflective anode, or a reflective layer may be provided on the side of the anode close to the substrate so that the light can be emitted through the cathode. The embodiments of the present disclosure are described taking an example in which the organic electroluminescent diode OLED in the display substrate is a top emission type. Moreover, the light emitting color of the organic electroluminescent diode OLED in the embodiments of the present disclosure may be green, and may also be any color such as red, white, blue, and the like.

The embodiment of the disclosure provides a display substrate, which is provided with a plurality of light emitting areas, wherein at least part of the light emitting areas comprise a first light emitting area and a second light emitting area.

The display substrate includes: the substrate base plate is arranged on the substrate base plate and is positioned on the light-emitting device of the light-emitting area; the light emitted by the light-emitting device in the first light-emitting area propagates along a first direction, and the light emitted by the light-emitting device in the second light-emitting area propagates at least along a second direction; the first direction is a direction from the substrate base plate to the light-emitting device, and the second direction is a direction from the light-emitting device to the substrate base plate.

The display substrate further includes: the photosensitive device is arranged on one side, away from the light-emitting device, of the substrate base plate; the light emitted by the light emitting device in the second light emitting area along the second direction can irradiate the photosensitive device. In some embodiments, the light sensing device is an external optical sensor.

In some embodiments, an area of an orthographic projection of the second light exiting region on the substrate is smaller than an area of an orthographic projection of the first light exiting region on the substrate.

Generally, an OLED display substrate includes an OLED light emitting device and a driving transistor for driving the OLED. The OLED may exhibit display non-uniformity after a long-term operation. This is for example due to the threshold voltage (V) of the drive transistor_th) Drift occurs, resulting in a change in current flowing through the OLED, thereby causing non-uniformity in display brightness, and possibly also display brightness due to aging of the OLED.

At present, the aging condition of the OLED is generally calculated by means of data accumulation and calculation, and then brightness compensation is performed, but the actual light intensity of the light emitting device cannot be directly sensed, so that the precision of the brightness compensation is low. The disclosure provides a display substrate, at least part of light emitting areas comprise a first light emitting area and a second light emitting area, the second light emitting area can emit light along the direction of a light emitting device pointing to a substrate and irradiate to a correspondingly arranged photosensitive device, so that the aging condition and the brightness change condition of an OLED (organic light emitting diode) can be accurately judged by actually sensing the light intensity and brightness information of the light emitting device, and brightness compensation is performed.

Specifically, the photosensitive device senses the light emitting change of the light emitting device and feeds the light emitting change back to the driving control end corresponding to the light emitting device through the external IC, so that the driving control end adjusts the driving voltage to adjust the display brightness.

In some embodiments, the light emitting regions have a plurality of color types, and all of the light emitting regions in at least one color type include a first light exit region and a second light exit region. Wherein, the color type corresponds to the light emitting device of the light emitting area, and the color type can comprise red, green, blue and white.

In some embodiments, one light emitting region corresponds to one sub-pixel. Specifically, the display substrate comprises a plurality of sub-pixels, and the plurality of sub-pixels arranged side by side along a third direction form a first pixel group; the display substrate may further include a plurality of signal lines, such as gate lines, control signal lines, data lines, and power lines, wherein the gate lines and the control signal lines extend in a third direction, the data lines and the power lines extend in a fourth direction, the third direction and the fourth direction intersect, that is, the gate lines and the data lines are arranged to intersect, and each of the first pixel groups includes a plurality of sub-pixels located at intersections of the gate lines and the data lines. Taking the third and fourth directions as the row and column directions, respectively, as an example, fig. 1 to 3 described below illustrate various arrangements of the first pixel group in some embodiments.

Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure. As shown in fig. 1, in the present embodiment, one first pixel group a includes three sub-pixels a, where the sub-pixels a include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, which respectively correspond to multiple color types of a light emitting region, i.e., red, green, and blue, and in some embodiments, the three sub-pixels a may also be arranged in a delta shape; in some embodiments, the first pixel group a is also referred to as a pixel unit, and each pixel unit may be arranged in an array or in a regular manner.

Fig. 2 is a schematic structural diagram of another display substrate according to an embodiment of the disclosure. As shown in fig. 2, a first pixel group a includes four sub-pixels a, where the sub-pixels a include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a white sub-pixel W, and the four sub-pixels a are arranged in a square (square) manner, that is, the first pixel group a includes two rows and two columns of four sub-pixels a; at this time, the four sub-pixels a share one gate line, and the four sub-pixels a are respectively connected with one data line.

Fig. 3 is a schematic structural diagram of another display substrate according to an embodiment of the disclosure. As shown in fig. 3, a first pixel group a includes four sub-pixels a, and the sub-pixels a include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a white sub-pixel W. It should be noted that the arrangement of the first pixel group is only an exemplary optional embodiment, which does not limit the protection scope of the present disclosure, and other directions are adopted for the third direction and the fourth direction, and other arrangements of the first pixel group are also applicable to the technical solution of the present disclosure.

Fig. 4 is a schematic structural diagram of another display substrate according to an embodiment of the disclosure. As shown in fig. 4, based on the arrangement of the first pixel groups shown in fig. 2, a layout of the second light-emitting areas corresponding to two adjacent first pixel groups is shown, and the layout is embodied in the form of a pixel layout. In (a), every two first pixel groups are used as a repeating unit, each of the red, green, blue and white sub-pixels corresponds to one second light-emitting area E (the corresponding rectangular opening position is selected by a circular frame in the drawing, that is, the second light-emitting area E is only the rectangular opening position), and is distributed at four corners of the two first pixel groups, and for the sub-pixels including the second light-emitting area E, the remaining light-emitting parts except the opening position corresponding to the second light-emitting area E are used as the first light-emitting areas F, so that the brightness compensation requirements corresponding to different colors can be sensed; in (b) and (c), which correspond to a case where all light emitting regions in at least one color type include the first light exiting region F and the second light exiting region E, in (b), only the red sub-pixel includes the first light exiting region F and the second light exiting region E, and in (c), the red sub-pixel and the blue sub-pixel include the first light exiting region F and the second light exiting region E; (b) and (c) exemplarily show two light exiting area setting manners under the pixel arrangement corresponding to fig. 2, based on (a), (b) and (c), it can be understood that, in any pixel arrangement manner, the second light exiting area E may be disposed only in the red sub-pixel or any other sub-pixel of the first pixel group, or may be disposed in a plurality of sub-pixels of the first pixel group, or may be disposed in each sub-pixel thereof.

In some embodiments, each sub-pixel includes a pixel circuit and a light emitting device, the pixel circuit including at least a switching transistor, a driving transistor, and a storage capacitor.

The switching transistor and the driving transistor may be oxide thin film transistors, polysilicon thin film transistors, or amorphous silicon thin film transistors, and the transistors in the embodiments of the present disclosure are described as oxide transistors in the following description. The switching transistor and the driving transistor may be both top-gate transistors and bottom-gate transistors, and the transistors in the embodiments of the present disclosure will be described as top-gate transistors in the following description. Since the switching transistor and the driving transistor each include a semiconductor active layer, a gate electrode, and a source electrode and a drain electrode disposed on the same layer, each layer on the display substrate will be described below by way of example based on each layer structure of the driving transistor and the light emitting device.

Fig. 5 is a cross-sectional view of a driving transistor and a light emitting device provided in an embodiment of the present disclosure. As shown in fig. 5, it exemplarily shows a case where the light emitting region includes a first light exit region CC and a second light exit region DD. The display substrate includes: a base substrate 10 on which the light emitting device 4 is disposed in the light emitting region is provided; the light emitted by the light emitting device 4 in the first light emitting area CC propagates along the first direction, and the light emitted by the light emitting device 4 in the second light emitting area DD propagates at least along the second direction; wherein the first direction is a direction pointing from the substrate base 10 to the light emitting device 4, and the second direction is a direction pointing from the light emitting device 4 to the substrate base 10. The display substrate further includes: a light sensing device 101 disposed on a side of the substrate base plate 10 facing away from the light emitting device; the light emitted from the light emitting device 4 in the second light exiting region DD along the second direction can be irradiated to the photosensitive device 101, and it should be understood that the photosensitive device 101 is illustrated in fig. 5 in the form of a layer, but may be embodied as a single device disposed only in the second light exiting region DD.

The driving transistor is a top gate oxide thin film transistor, and includes a semiconductor active layer 51, a gate insulating layer 302, a gate electrode 52, an interlayer insulating layer 303, a source electrode 53, and a drain electrode 54, which are sequentially stacked. Wherein the source electrode 53 and the drain electrode 54 are respectively located at opposite sides of the gate electrode 52, and the source electrode 53 and the drain electrode 54 are respectively in contact with source contact regions and drain contact regions located at opposite sides of the semiconductor active layer 51 through vias (e.g., metal vias). It should be understood that in some embodiments, this drive transistor may also be of the bottom-gate type.

In some embodiments, for a sub-pixel comprising a first light exit region and a second light exit region, the orthographic projection of its drive transistor on the light exit side is located within its first light exit region; corresponding to fig. 4, the orthographic projection of the driving transistor on the light emitting side (corresponding to the first direction) is located in the first light emitting region CC. Therefore, the whole area occupation can be reduced, and the problem that the area of a non-display area of the display substrate is increased due to the increase of the second light-emitting area is avoided.

In some embodiments, as shown in fig. 5, a light emitting device includes a cathode 403, a first anode 401, and an organic functional layer 402 disposed between the cathode 403 and the first anode 401; the first anode 401 is electrically connected to the driving transistor, specifically, the first anode 401 is electrically connected to the source 53/drain 54 of the driving transistor, in this embodiment, the first anode 401 is electrically connected to the source 53 of the driving transistor.

In some embodiments, as shown in fig. 5, a planarization layer 304 is provided on the side of the drive transistor facing away from the substrate 10. The planarization layer 304 is usually made of organic materials, such as: photoresist, acrylic-based polymers, silicon-based polymers, and the like. The first anode 401 is formed on the planarization layer 304.

In some embodiments, as shown in FIG. 5, a pixel defining layer 306 is also formed on the planarization layer 304. From the perspective of all the light emitting areas and the sub-pixels, the pixel defining layer 306 defines each light emitting area; for the light emitting region, the pixel defining layer 306 includes a first pixel defining portion 3061, which defines a first light emitting region CC and defines a second light emitting region DD together with a second pixel defining portion 3062 of the adjacent light emitting region.

The first anode 401 of the light emitting device may be electrically connected to the source 53 of the driving transistor through a via penetrating through the planarization layer 304, and the first anode 401 may be made of Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), or other materials; the pixel defining layer 306 may cover the planarization layer 304, and the pixel defining layer 306 may be made of an organic material, such as: an organic material such as photoresist, and the pixel defining layer 306 may have a receiving portion exposing the anode 401, i.e., corresponding to the position of the opening defined by the first pixel defining portion 3061 in fig. 4; an organic functional layer 402 is positioned in the receiving portion and formed on the first anode 401, the organic functional layer 402 may include a small molecule organic material or a polymer molecule organic material, may be a fluorescent light emitting material or a phosphorescent light emitting material, may emit red light, green light, blue light, or may emit white light, etc.; also, in some embodiments, the organic functional layer 402 may include an electron injection layer, an electron transport layer, a hole blocking layer, a light emitting layer, an electron blocking layer, a hole transport layer, and a hole injection layer; the cathode 403 is covered with the functional layer 402, and the cathode 403 may be made of metal material such as lithium (Li), aluminum (Al), magnesium (Mg), and silver (Ag).

It should be noted that the first anode 401, the organic functional layer 402 and the cathode 403 form an organic light emitting diode, wherein the display substrate includes organic light emitting diodes arranged in an array. In addition, the first anodes 401 of the organic light emitting diodes are independent of each other, and the cathodes 403 of the organic light emitting diodes may be connected over the entire surface; that is, the cathode 403 is a whole surface structure disposed on the display substrate and is a common electrode of the plurality of organic light emitting diodes.

In some embodiments, as shown in fig. 5, the display substrate further includes: a light-shielding layer 311; the light shielding layer 311 is located between the base substrate 10 and the light emitting device 4; the light-shielding layer includes: and an opening 3111 disposed corresponding to the second light-exiting region DD. Specifically, in order to prevent the electron mobility of the semiconductor active layer 51 from being affected by light, a light-shielding layer 311 and a buffer layer 301 are sequentially formed on the substrate 10 before the transistor is formed; in order to ensure that the light emitted from the second light-emitting region can propagate to the photosensitive device 101 in the second direction, the light-shielding layer 311 is correspondingly provided with an opening 3111.

In some embodiments, the material of the gate electrode 52 and the light shielding layer 311 may include a metal material or an alloy material, such as molybdenum, aluminum, titanium, and the like. The source electrode 53 and the drain electrode 54 may include a metal material or an alloy material, such as a metal single layer or a multi-layer structure formed of molybdenum, aluminum, titanium, and the like, for example, a multi-metal layer stack, such as a titanium, aluminum, titanium three-layer metal stack (Al/Ti/Al), and the like. The material of the semiconductor active layer 51 may include an oxide semiconductor material, such as indium gallium zinc oxide, indium gallium tin oxide, or the like.

Of course, in some embodiments, an encapsulation layer and the like may be further included on the light emitting device, where the encapsulation layer includes a first encapsulation layer, a second encapsulation layer and a third encapsulation layer, which are sequentially stacked. The first packaging layer and the third packaging layer are used for preventing water and oxygen from entering the light-emitting device; the first packaging layer and the third packaging layer can be made of inorganic materials such as silicon nitride, silicon oxide and the like. The second packaging layer is used for realizing the planarization effect so as to facilitate the manufacturing of the third packaging film layer, and the second packaging layer can be made of acrylic-based polymers, silicon-based polymers and other materials.

Fig. 6 is a cross-sectional view of another driving transistor and light emitting device provided in an embodiment of the present disclosure. As shown in fig. 6, this configuration is an embodiment alternative to the configuration shown in fig. 5. The light emitting device 4 further includes: and a second anode 404 disposed between the organic functional layer 402 and the first anode 401, the second anode 404 being disposed corresponding to the first light-exiting region, the second anode 404 being a reflective anode.

In some embodiments, as shown in fig. 6, the display substrate further includes: an encapsulation layer 61 and a shielding layer 62; the encapsulation layer 61 is positioned on the side of the cathode 403 facing away from the substrate base plate 10; the shielding layer 62 is located on a side of the encapsulation layer 61 facing away from the substrate base plate 10.

In some embodiments, as shown in fig. 6, the display substrate further includes: the filter layer 71 may be a red filter layer, a green filter layer, a blue filter layer, a white filter layer, or the like.

Fig. 7 is a cross-sectional view of still another driving transistor and light emitting device provided by an embodiment of the present disclosure. As shown in fig. 7, which is an embodiment alternative based on the structure shown in fig. 6. The shielding layer 62 includes a shielding portion 621 disposed corresponding to the second light exiting region. Specifically, the light emitted from the light emitting device 4 in the second light emitting region DD also propagates along the first direction, and corresponding to the scheme shown in fig. 6, the shielding layer 62 is not provided with the shielding portion 621, so that the display light efficiency can be improved, and the utilization rate of the light emitting device 4 can be improved; in contrast to the solution shown in fig. 7, the shielding layer 62 is provided with a shielding portion 621, which can prevent the external ambient light from affecting the sensing precision of the light sensing device 101, and improve the accuracy of the measured brightness information.

The embodiment of the present disclosure also provides a display device, including: a display substrate as claimed in any one of the preceding embodiments.

In some embodiments, the display device further comprises: the device comprises an acquisition module and a brightness compensation module.

The acquisition module is used for acquiring brightness information corresponding to each second light-emitting area through the photosensitive device; the brightness compensation module is used for determining a light emitting region to be compensated according to the brightness information acquired by the acquisition module and preset reference brightness information, and performing brightness compensation on the light emitting region to be compensated.

Correspondingly, the embodiment of the disclosure also provides a brightness compensation method, which is applied to the display device; the method comprises the following steps: acquiring brightness information corresponding to each second light-emitting area through a photosensitive device; and determining a luminous zone to be compensated according to the acquired brightness information and preset reference brightness information, and performing brightness compensation on the luminous zone to be compensated.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless expressly stated otherwise, as would be apparent to one skilled in the art. Accordingly, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the disclosure as set forth in the appended claims.

Claims (10)

1. A display substrate is provided with a plurality of light emitting areas, wherein at least part of the light emitting areas comprise a first light emitting area and a second light emitting area;

the display substrate includes: the substrate base plate is arranged on the substrate base plate and is positioned on the light-emitting device of the light-emitting area; the light emitted by the light-emitting device in the first light-emitting area propagates along a first direction, the light emitted by the light-emitting device in the second light-emitting area propagates at least along a second direction, the first direction is a direction from the substrate to the light-emitting device, and the second direction is a direction from the light-emitting device to the substrate;

the display substrate further includes: the photosensitive device is arranged on one side, away from the light-emitting device, of the substrate base plate; the light emitted by the light emitting device in the second light emitting area along the second direction can irradiate the photosensitive device.

2. The display substrate according to claim 1, wherein one of the light emitting regions corresponds to one of the sub-pixels; each of the sub-pixels includes a pixel circuit including at least a switching transistor, a driving transistor, and a storage capacitor, and the light emitting device.

3. The display substrate of claim 2, wherein the light emitting device comprises a cathode, a first anode, and an organic functional layer disposed between the cathode and the first anode; the first anode is electrically connected with the driving transistor;

for a sub-pixel comprising the first light-emitting area and the second light-emitting area, the orthographic projection of the driving transistor on the light-emitting side is positioned in the first light-emitting area.

4. The display substrate of claim 2, wherein the light emitting device further comprises: and the second anode is arranged between the organic functional layer and the first anode, corresponds to the first light emergent region and is a reflective anode.

5. The display substrate of claim 4, further comprising: an encapsulation layer and a shielding layer;

the packaging layer is positioned on one side of the cathode, which is far away from the substrate base plate;

the shielding layer is positioned on one side of the packaging layer, which is far away from the substrate base plate; the light emitted by the light-emitting device in the second light-emitting area also propagates along the first direction, and the shielding layer comprises a shielding part which is arranged corresponding to the second light-emitting area.

6. The display substrate of claim 1, wherein the light emitting regions have a plurality of color types, all of the light emitting regions in at least one color type comprising the first light exit region and the second light exit region.

7. The display substrate of claim 1, wherein an area of an orthographic projection of the second light exiting region on the substrate is smaller than an area of an orthographic projection of the first light exiting region on the substrate.

8. The display substrate of claim 7, further comprising: a pixel defining layer; the pixel defining layer defines the light emitting area;

for a light emitting region including the first light exit region and the second light exit region, the pixel defining layer includes a first pixel defining portion; the first pixel limiting portion defines the first light emitting area, and the first pixel limiting portion and the second pixel limiting portion of the adjacent light emitting area define the second light emitting area together.

9. The display substrate of claim 1, further comprising: a light-shielding layer;

the light shielding layer is positioned between the substrate and the light-emitting device;

the light-shielding layer includes: and the opening corresponds to the second light emergent area.

10. A display device, comprising: a display substrate according to any one of claims 1 to 9.

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