Patent ID: 12245451

DETAILED DESCRIPTION

In order to make the objects, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and specific embodiments. It should be understood that, the specific embodiments described herein are only for illustration of the present application, instead of limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details.

In electronic devices such as mobile phones and tablets, photosensitive components (e.g., front cameras, infrared light sensors, and proximity light sensors) are required to be integrated on the side where display panels are provided. In some embodiments, light-transmitting display regions may be provided on the above-described electronic devices, and the photosensitive components may be arranged on the back of the light-transmitting display regions, so that full-screen displaying by the electronic devices can be realized with the operation of the photosensitive components being ensured.

In order to ensure good displaying effect by the light-transmitting display regions, cathodes of sub-pixels in the light-transmitting display regions are required to meet predetermined light-transmitting performance. However, the light-transmitting performance of the cathodes of the sub-pixels in the light-transmitting display regions cannot be unlimitedly improved. Therefore, the light-transmitting performance of the light-transmitting display regions cannot meet the requirements of the integrated photosensitive components.

In order to solve the above problems, the embodiments of the present application provide a light-transmitting display panel and a method for manufacturing the same, and a display panel. Various embodiments of the light-transmitting display panel and the method for manufacturing the same, and the display panel will be described below with reference to the accompanying drawings.

The embodiments of the present application provide a light-transmitting display panel, which may be an organic light emitting diode (OLED) display panel.

The “light-transmitting display panel” used herein refers to a display panel with transmittance being greater than or equal to 15%. In order to ensure that transmittance of the light-transmitting display panel is greater than or equal to 15%, greater than 40%, or even more, transmittance of at least some of functional film layers of the light-transmitting display panel according to the embodiments of the present application is greater than 80% or even greater than 90%.

FIG.1is a schematic top view of a light-transmitting display panel according to a first embodiment of the present application.FIG.2is a schematic cross-sectional view along the A-A direction shown inFIG.1.FIG.3is a schematic cross-sectional view according to the B-B direction shown inFIG.1. The light-transmitting display panel100includes an array substrate110, first electrodes120, one or more first light-emitting structure130, and a second electrode layer group140.

The array substrate110includes a substrate111and a device layer112on the substrate111. The substrate111may be made of light-transmitting materials such as glass or polyimide (PI). The device layer112may include pixel circuits for driving displaying by respective sub-pixels.

The light-transmitting display panel100may further include a pixel defining layer150located on the device layer112. The pixel defining layer150may include pixel openings.

The first electrodes120are located on the array substrate110. Optionally, the first electrodes120may be arranged in an array. Each of the first light-emitting structures130is located on one of the first electrodes120. At least some of the pixel openings of the pixel defining layer150are configured to receive the first light-emitting structures130. The second electrode layer group140is located on the first light-emitting structures130. Each of the first electrodes120, its corresponding first light-emitting structure130, and its corresponding second electrode layer group140form a first sub-pixel SP1. The first electrode120may be connected to its corresponding pixel circuit in the device layer, so that the pixel circuit drives displaying by the first sub-pixel Sp1.

One of the first electrode120and the second electrode layer group140is an anode, and the other is a cathode. Here, for illustration, the first electrode120is taken as an anode and the second electrode layer group140is taken as a cathode.

Optionally, the first electrode120may be a light-transmitting electrode. The first electrode120may include an indium tin oxide (ITO) layer or an indium zinc oxide (IZO) layer. Optionally, the first electrode120may be a light-proof electrode, that is, the first electrode120may be a reflective electrode, so that the displaying effect by the formed first sub-pixel SP1can be improved. The reflective electrode may include a first light-transmitting conductive layer, a reflective layer on the first light-transmitting conductive layer, and a second light-transmitting conductive layer on the reflective layer. The first light-transmitting conductive layer and the second light-transmitting conductive layer may be made of ITO, IZO, etc., and the reflective layer may be a metal layer which for example is made of silver.

The first light-emitting structure130may include an emitting layer (EML). Depending on different colors of light emitted by the EMLs, the formed first sub-pixels SP1may be categorized into multiple types. The first sub-pixels SP1may include first sub-pixels emitting red light, first sub-pixels emitting green light, and first sub-pixels emitting blue light, but of course, other examples are not limited thereto. Depending on the design requirements of the first light-emitting structure130, the first light-emitting structure130may further include at least one of a hole inject layer (HIL), a hole transport layer (HTL), and an electron inject layer (EIL), or an electron transport layer (ETL).

In this embodiment, the second electrode layer group140includes a first sub-electrode layer141and a second sub-electrode layer142that are stacked. The first sub-electrode layer141includes electrode blocks141sspaced from each other. An orthographic projection of each of the electrode blocks141son the array substrate110overlaps an orthographic projection of at least one first electrode120on the array substrate110. The second sub-electrode layer142connects at least a part of adjacent electrode blocks141s. Light-transmitting performance of the second sub-electrode layer142is greater than light-transmitting performance of the electrode blocks141s. The second sub-electrode layer142can directly or indirectly electrically interconnect the electrode blocks141s, so that the second electrode layer group140is a common electrode of the light-transmitting display panel100.

In this embodiment, for illustration, the orthographic projection of each electrode block141son the array substrate110is exemplified as covering an orthographic projection of one first electrode120on the array substrate110, that is, a position of each electrode block141sis corresponding to a position of one first electrode120. In some other embodiments, the orthographic projection of each electrode block141son the array substrate110may cover orthographic projections of 2, 4, or other numbers of first electrodes120on the array substrate110.

In the light-transmitting display panel100according to this embodiment of the present application, the orthographic projection of the electrode block141son the array substrate110covers the orthographic projection of at least one first electrode120on the array substrate110, which ensures that the formed first sub-pixel SP1has high color accuracy. The second sub-electrode layer142connects at least a part of the adjacent electrode blocks141s, and the light-transmitting performance of the second sub-electrode layer142is greater than that of the electrode blocks141s, thereby improving the light-transmitting performance of the non-luminous regions around the first sub-pixels SP1while ensuring the normal displaying by the first sub-pixels SP1, which further improves average light-transmitting performance of the light-transmitting display panel100. Photosensitive components can be integrated on the back of the light-transmitting display panel100to realize that the photosensitive components such as a camera are integrated under the screen and the light-transmitting display panel100can display images at the same time, thereby realizing a full-screen design where the light-transmitting display panel100is in a display device.

Optionally, the first sub-electrode layer141may include a ytterbium layer or a magnesium-silver alloy layer, so that the first sub-electrode layer141, the first electrode120and the layer structure therebetween can create a suitable microcavity effect. The displaying effect by the formed first sub-pixel SP1can be improved, and the likelihood of occurrence of color shift can be reduced.

Optionally, the second sub-electrode layer142may include an indium tin oxide layer or an indium zinc oxide layer. In some other embodiments, the second sub-electrode layer142may have other transparent conductive layer structures, thereby improving light-transmitting performance of regions between the adjacent electrode blocks141sof the first sub-electrode layer141.

Optionally, an orthographic projection of each first light-emitting structure130on the array substrate110may be composed of one first shape unit or composed of two or more first shape units joined together. The first shape unit may include at least one shape selected from a group consisting of a circle, an oval, a dumbbell, a gourd, and a rectangle, which can reduce diffraction in the light-transmitting display panel.

Optionally, the orthographic projection of each first electrode120on the array substrate110may be composed of one second shape unit or composed of two or more second shape units joined together. The second shape unit may include at least one shape selected from a group consisting of a circle, an oval, a dumbbell, a gourd, and a rectangle, which can reduce diffraction in the light-transmitting display panel.

In this embodiment, the second sub-electrode layer142is a continuous and complete plane structure, and an orthographic projection of the second sub-electrode layer142on the array substrate110covers orthographic projections of all electrode blocks141son the array substrate110. The second sub-electrode layer142may cover the entire display region of the light-transmitting display panel100, thereby interconnecting all the electrode blocks141s.

In the above-mentioned first embodiment, the second sub-electrode layer142is located on the first light-emitting structure130, and the first sub-electrode layer141is located on the second sub-electrode layer142. In some other embodiments, the first sub-electrode layer141and the second sub-electrode layer142may be stacked in other manners.

FIG.4is a schematic top view of a light-transmitting display panel according to a second embodiment of the present application.FIG.5is a schematic cross-sectional view along the C-C direction shown inFIG.4.FIG.6is a schematic cross-sectional view along the D-D direction shown inFIG.4. A part of the structure of the light-transmitting display panel100according to the second embodiment is the same as that of the light-transmitting display panel100according to the first embodiment. Differences between the structure of the light-transmitting display panel100according to the second embodiment and the light-transmitting display panel100according to the first embodiment will be described below, and the similarities will not be described in detail.

In contrast to the first embodiment, in the second embodiment, the first sub-electrode layer141is located on the first light-emitting structure130, and the second sub-electrode layer142is located on the first sub-electrode layer141. The second sub-electrode layer142may be a continuous and complete plane structure, and the second sub-electrode layer142may be arranged to cover all electrode blocks141sof the first sub-electrode layer141.

In the above embodiments, the second sub-electrode layer142has a continuous and complete surface structure, and the orthographic projection of the second sub-electrode layer142on the array substrate110covers the orthographic projections of all electrode blocks141son the array substrate110. In some other embodiments, the second sub-electrode layer142may not be limited to the above arrangement.

FIG.7is a schematic top view of a light-transmitting display panel according to a third embodiment of the present application.FIG.8is a schematic cross-sectional view along the E-E direction shown inFIG.7.FIG.9is a schematic cross-sectional view along the F-F direction shown inFIG.7. A part of the structure of the light-transmitting display panel100according to the third embodiment is the same as that of the light-transmitting display panel100according to the first embodiment. Differences between the structure of the light-transmitting display panel100according to the third embodiment and the light-transmitting display panel100according to the first embodiment will be described below, and the similarities will not be described in detail.

In this embodiment, the electrode blocks141sare arranged in multiple columns. The multiple columns of electrode blocks141sare arranged along a first direction X. Each column of the multiple columns of electrode blocks141sincludes multiple electrode blocks141sarranged at intervals along a second direction Y. The second direction Y is perpendicular to the first direction X.

The second sub-electrode layer142includes multiple connecting units142uarranged along the first direction X, and each connecting unit142uinterconnects electrode blocks141sin a corresponding columns of the multiple columns of electrode blocks141s. In this embodiment, each connecting unit142uis in a shape of a strip extending along the second direction Y. Adjacent connecting units142uare spaced from each other along the first direction X. An orthographic projection of each connecting unit142uon the array substrate110covers orthographic projections of all electrode blocks141sin the corresponding column on the array substrate110. The multiple connecting units142umay be electrically interconnected via an electrical connecting structure143, so that the electrode blocks141sof the light-transmitting display panel100are connected as a common electrode of the light-transmitting display panel100via the connecting units142uand the electrical connecting structure143. The electrical connecting structure143may be located at a same end along the extension direction of the connecting units142u. The electrical connecting structure143is made of a conductive material, and may be formed simultaneously with the connecting units142uor in a separate step.

According to the light-transmitting display panel100according to the above embodiments, adjacent columns of electrode blocks141sin the multiple columns of electrode blocks141sare spaced from each other, and adjacent connecting units142uare spaced from each other along the first direction X, so that the light-transmitting performance between adjacent columns of electrode blocks141sof the light-transmitting display panel100is further improved, which improves the average light-transmitting performance of the light-transmitting display panel100, thereby achieving higher photosensitive performance of photosensitive components when the photosensitive components are integrated on the back of the display panel.

FIG.10is a schematic top view of a light-transmitting display panel according to a fourth embodiment of the present application.FIG.11is a schematic cross-sectional view along the G-G direction shown inFIG.10.FIG.12is a schematic cross-sectional view along the H-H direction shown inFIG.10. A part of the structure of the light-transmitting display panel100according to the fourth embodiment is the same as that of the light-transmitting display panel100according to the first embodiment. Differences between the structure of the light-transmitting display panel100according to the fourth embodiment and the light-transmitting display panel100according to the first embodiment will be described below, and the similarities will not be described in detail.

In this embodiment, the electrode blocks141sare arranged in multiple columns, the multiple columns of electrode blocks141sare arranged along the first direction X, and each column of the multiple columns of electrode blocks141sincludes a plurality of electrode blocks141sarranged at intervals in the second direction Y perpendicular to the first direction X. The second sub-electrode layer142includes a plurality of connecting units142uarranged along the first direction X, and each connecting unit142uinterconnects the electrode blocks141sof the corresponding columns in the plurality of columns of electrode blocks141s.

In this embodiment, adjacent connecting units142uare spaced apart from each other in the first direction X, each connecting unit142uincludes a plurality of connecting blocks142sarranged at intervals in the second direction Y, and each connecting block142sis connected to the second adjacent electrode blocks141sin the direction Y. The plurality of connecting units142umay be electrically interconnected through the electrical connecting structure143, so that each electrode block141sof the light-transmitting display panel100is connected as a common electrode of the light-transmitting display panel100through the connecting unit142uand the electrical connecting structure143. The electrical connecting structure143may be located at the same end of the extension direction of the connecting units142u. For example, in this embodiment, the electrical connecting structure143interconnects connecting blocks142sof the connecting units142uat a same end of the extension direction. The electrical connecting structure143is made of a conductive material, and may be formed simultaneously with the connecting blocks142sof the connecting units142uor in a separate step.

Optionally, a shape and a size of an orthographic projection of each connecting block142son the array substrate are the same as a shape and a size of the orthographic projection of each electrode block141son the array substrate110. A spacing between electrode blocks adjacent in the second direction Y is smaller than a length of an electrode block141sin the second direction Y.

In the light-transmitting display panel100according to the above embodiments, the orthographic projection of the connecting block142on the array substrate and the orthographic projection of the electrode block141on the array substrate110are the same in shape and size, so that the connecting block142and the electrode block141can be formed by patterning using a same mask plate which saves production costs and improves the production efficiency of the light-transmitting display panel100. The second electrode layer group140of the light-transmitting display panel100according to the above embodiments may for example be formed by the following method.

Vapor deposition is performed using a mask plate to form one of the electrode blocks141sand the connecting blocks142son the first emitting structure130. The mask plate includes multiple columns of openings arranged along a first direction X, each column of the multiple columns of openings includes multiple openings arranged at intervals along a second direction Y. The second direction Y is perpendicular to the first direction X. A spacing between openings adjacent in the second direction Y is smaller than a length of an opening in the second direction Y. For example, in this step, the electrode blocks141sare formed on the first light-emitting structure130.

Then the mask plate is translated along the second direction Y by a preset distance. The vapor deposition is performed using the mask plate to form the other one of the electrode blocks141sand the connecting blocks142s. The preset distance is greater than the spacing between the openings adjacent in the second direction Y and is less than the length of the opening in the second direction Y. For example, in this step, the connecting block142is formed, and the connecting blocks142connects the adjacent electrode blocks141sin the second direction Y. In some implementations, while connecting the adjacent electrode blocks141s, the orthographic projection of the connecting block142son the array substrate110covers the orthographic projection of at least one first electrode120on the array substrate110, so that a film layer of the second electrode layer group140in the region corresponding to the light-emitting structure130is thick, which improves the displaying effect.

In addition, an electrical connecting structure143connecting the connecting blocks142sadjacent in the first direction X is formed. The electrical connecting structure143may also be formed by performing vapor deposition on a conductive material.

This embodiment of the present application further provides a display panel, which may be an OLED display panel.

FIG.13is a schematic top view of a display panel according to a fifth embodiment of the present application.FIG.14is a schematic enlarged partial view of the region I shown inFIG.13.FIG.15is a schematic cross-sectional view along the J-J direction shown inFIG.14.FIG.16is a schematic cross-sectional view along the K-K direction shown inFIG.14. The display panel1000has a first display region AA1and a second display region AA2adjoining each other. Transmittance of the first display region AA1is greater than transmittance of the second display region AA2. The first display region AA1of the display panel1000is configured as the light-transmitting display panel100according to any one of the above embodiments.

In the display panel1000according to the fifth embodiment, for illustration, the first display region AA1of the display panel1000is exemplified as being configured as the light-transmitting display panel100according to the above first embodiment.

Here, preferably, the transmittance of the first display region AA1is greater than or equal to 15%. In order to ensure that the transmittance of the first display region AA1is greater than 15%, greater than 40%, or even more, transmittance of at least some of functional film layers of the display panel1000according to this embodiment of the present application in the first display region AA1is greater than 80% or even greater than 90%.

The light-transmitting display panel100includes an array substrate110, first electrodes120, one or more first light-emitting structures130, and a second electrode layer group140. The first electrodes120are located on the array substrate110. Optionally, the first electrodes120are arranged in an array. Each of the first light-emitting structures130is located on one of the first electrodes120. The second electrode layer group140is located on the first light-emitting structures130. Each first electrode120, its corresponding first light-emitting structure130, and its corresponding second electrode layer group140form a first sub-pixel SP1.

The second electrode layer group140includes a first sub-electrode layer141and a second sub-electrode layer142that are stacked. The first sub-electrode layer141includes electrode blocks141sspaced from one another. An orthographic projection of each of the electrode blocks141son the array substrate110covers an orthographic projection of at least one first electrode120on the array substrate110. The second sub-electrode layer142connects at least a part of adjacent electrode blocks141s. Light-transmitting performance of the second sub-electrode layer142is greater than light-transmitting performance of the electrode block141s. The second sub-electrode layer142can directly or indirectly electrically interconnect the electrode blocks141s, so that the second electrode layer group140is a common electrode of the first display region AA1.

In the display panel1000according to the embodiment of the present application, the transmittance of the first display region AA1is greater than the transmittance of the second display region AA2, so that photosensitive components can be integrated on the back of the first display region AA1of the display panel1000, to realize that, for example, photosensitive components such as a camera are integrated under the screen and the first display region AA1can display images at the same time, which increases the display area of the display panel1000and realizes the full-screen design of the display device.

In addition, the second electrode layer group140of the first display region AA1includes first sub-electrode layer141and a second sub-electrode layer142that are stacked. Orthographic projections of the electrode blocks141sincluded in the first sub-electrode layer141on the array substrate110cover the orthographic projection of at least one first electrode120on the array substrate110, which ensures that the formed first sub-pixel SP1has high color accuracy. The second sub-electrode layer142connects at least a part of adjacent electrode blocks141s. Light-transmitting performance of the second sub-electrode layer142is greater than that of the electrode blocks141s, thereby improving the light-transmitting performance of the non-luminous regions around the first sub-pixels SP1while ensuring the normal displaying by the first sub-pixels SP1, which further improves average light-transmitting performance of the first display region AA1. When the photosensitive components are integrated on the back of the first display region AA1, the photosensitive component can have higher photosensitive performance.

Optionally, the display panel1000may further include third electrodes210, one or more second light-emitting structures220, and fourth electrodes230. The third electrodes210, the second light-emitting structures220, and the fourth electrodes230are located in the second display region AA2.

The third electrode210is located on the array substrate110. Optionally, the third electrodes210are arranged in an array. The second light-emitting structures220are located on the third electrodes210. Optionally, the pixel defining layer150includes first pixel openings located in the first display region AA1and second pixel openings located in the second display region AA2. The first pixel openings are configured to receive the first light-emitting structure130s, and the second pixel openings are configured to receive the second light-emitting structures220. Each of the fourth electrodes230is located on one of the second light-emitting structures220.

One of the third electrode210and the fourth electrode230is an anode, and the other is a cathode. Here, for illustration, the third electrode210is exemplified as an anode and the fourth electrode230is exemplified as a cathode. Each third electrode210, its corresponding second light-emitting structure220, and its corresponding fourth electrode230form a second sub-pixel SP2. The third electrode210may be connected to a corresponding pixel circuit in the device layer, so that the pixel circuit drives the displaying by the second sub-pixel SP2.

Optionally, an area of the first electrode120of the first sub-pixel SP1is smaller than an area of the third electrode210of the second sub-pixel SP2of a same color.

Optionally, the third electrode210may be configured to have a same material and a same layer structure as the first electrode120. For example, the third electrode210is a reflective electrode.

The second light-emitting structure220may be configured to be of a same type as the first light-emitting structure130. The second light-emitting structure220and the first light-emitting structure130of a same type have a same material and a same layer structure.

Optionally, the second sub-electrode layer142of the second electrode layer group140is electrically connected to the fourth electrode230. That is, the second electrode layer group140and the fourth electrode230are interconnected as a common electrode of the display panel1000.

The connection manner of the second sub-electrode layer142and the fourth electrode230may be adjusted according to design requirements. For example, as shown inFIG.17, which is a schematic exploded perspective view of the second electrode layer group and the fourth electrode in the region I shown inFIG.13, in this embodiment, the second sub-electrode layer142is a continuous and complete plane structure. The orthographic projection of the second sub-electrode layer142on the array substrate110covers the orthographic projections of all electrode blocks141son the array substrate110and an orthographic projection of the fourth electrode230on the array substrate110.

In a formation process of the second electrode layer group and the fourth electrode of the above display panel1000, the second sub-electrode layer142may be formed first, and the second sub-electrode layer142may cover the first display region AA1and the second display region AA2. Then, multiple patterned electrode blocks141sare formed on the second sub-electrode layer142of the first display region AA1, and the fourth electrodes230are formed on the second sub-electrode layer142of the second display region AA2.

FIG.18is a schematic top view of a display panel according to a sixth embodiment of the present application.FIG.19is a schematic enlarged partial view of the L region shown inFIG.18.FIG.20is a schematic cross-sectional view along the M-M direction shown inFIG.19.FIG.21is a schematic cross-sectional view along the N-N direction shown inFIG.19. The display panel1000according to the sixth embodiment has a first display region AA1and a second display region AA2adjoining each other. Transmittance of the first display region AA1is greater than transmittance of the second display region AA2. For illustration, the first display region AA1of the display panel1000according to the sixth embodiment is exemplified as being configured as the light-transmitting display panel100according to the above fourth embodiment.

Hereinafter, differences between the display panel1000according to the sixth embodiment and the display panel1000according to the fifth embodiment will be described, and the similarities will not be described in detail.

In this embodiment, in the first display region AA1, the electrode blocks141sare arranged in multiple columns. The multiple columns of electrode blocks141sare arranged along the first direction X. Each column of the multiple columns of electrode blocks141sincludes multiple electrode blocks141sarranged at intervals along the second direction Y. The second direction Y is perpendicular to the first direction X. The second sub-electrode layer142includes multiple connecting units142uarranged along the first direction X. Each connecting unit142uinterconnects electrode blocks141sin a corresponding columns of the multiple columns of electrode blocks141s.

Adjacent connecting units142uare spaced from each other in the first direction X. Each connecting unit142uincludes multiple connecting blocks142sarranged at intervals along the second direction Y. Each connecting block142sconnects electrode blocks141sadjacent in the second direction Y.

The multiple connecting units142umay be electrically interconnected via the electrical connecting structure143, so that the electrode blocks141sof the first display region AA1are connected as a common electrode of the first display region AA1via the connecting units142uand the electrical connecting structure143. The electrical connecting structure143is further connected to the fourth electrodes230, so that the second electrode layer group140and the fourth electrodes230are interconnected as a common electrode of the display panel1000.

The electrical connecting structure143may be located at a same end of the extension direction of the connecting units142u. For example, in this embodiment, the electrical connecting structure143electrically interconnects connecting blocks142sin respective connecting units142uthat are at a same end of the extension direction. The electrical connecting structure143is made of a conductive material, and may be formed simultaneously with the connecting blocks142sof the connecting units142uor in a separate step.

Optionally, a shape and a size of the orthographic projection of each connecting block142son the array substrate110are the same as a shape and a size of the orthographic projection of each electrode block141son the array substrate110. A spacing between the electrode blocks141sadjacent in the second direction Y is smaller than a length of an electrode block141sin the second direction Y.

The second electrode layer group140and the fourth electrodes230of the display panel1000according to the above embodiments may for example be formed by the following method.

The fourth electrodes230are formed on the second light-emitting structures220of the second display region AA2. The fourth electrodes230may be arranged to cover the second display region AA2.

Vapor deposition is performed using a mask plate to form the electrode blocks141son the first emitting structure130. The mask plate includes multiple columns of openings arranged along a first direction X, and each column of the multiple columns of openings includes multiple openings arranged at intervals along a second direction Y. The second direction Y is perpendicular to the first direction X. A spacing between openings adjacent in the second direction Y is smaller than a length of an opening in the second direction Y.

Then the mask plate is translated closer to the second display region AA2along the second direction Y by a preset distance. The vapor deposition is performed using the mask plate to form the connecting blocks142s. The preset distance is greater than the spacing between the openings adjacent in the second direction Y and is less than the length of the opening in the second direction Y. Optionally, while connecting the adjacent electrode blocks141s, the orthographic projection of the connecting block142son the array substrate110covers the orthographic projection of at least one first electrode120on the array substrate110, so that a film layer of the second electrode layer group140in the region corresponding to the light-emitting structure130is thick, which improves the displaying effect.

In addition, an electrical connecting structure143connecting the connecting blocks142sadjacent in the first direction X is formed. The electrical connecting structure143may also be formed by performing vapor deposition on a conductive material. The electrical connecting structure143connects connecting blocks142sadjacent in the first direction X, and connects the fourth electrodes230.

The embodiments of the present application further provide a method for manufacturing a light-transmitting display panel, according to which the light-transmitting display panel100according to the above embodiments can be manufactured.

FIG.22is a flowchart of a method for manufacturing a light-transmitting display panel according to an embodiment of the present application. The method for manufacturing the light-transmitting display panel includes steps S110to S140.

At step S110, an array substrate is provided. Providing the array substrate may include providing a substrate and forming a device layer on the substrate.

At step S120, first electrodes are formed on the array substrate. The first electrode may be, for example, an anode of an OLED device. The first electrode may be formed by patterning, thereby obtaining multiple first electrodes arranged in an array. Optionally, the first electrode is a light-transmitting electrode, and its material may be, for example, a transparent conductive material such as ITO or IZO. Optionally, the first electrode is a reflective electrode, which may include, for example, a first light-transmitting conductive layer, a reflective layer on the first light-transmitting conductive layer, and a second light-transmitting conductive layer on the reflective layer. The first light-transmitting conductive layer and the second light-transmitting conductive layer can be ITO, IZO, etc., and the reflective layer may be a metal layer which for example, may be made of silver.

At step S130, one or more first light-emitting structures are formed on the first electrodes. Optionally, after the above first electrodes are formed, a pixel defining layer may be formed on the array substrate. The pixel defining layer may be patterned so that the pixel defining layer includes multiple pixel openings corresponding to positions of the first electrodes. Forming the first light-emitting structures may include forming the first light-emitting structures on the first electrodes in the pixel openings. The first light-emitting structure may include a light emitting layer. Depending on the design requirements of the first light-emitting structure, the first light-emitting structure may further include at least one of a hole injection layer, a hole transport layer, an electron injection layer, or an electron transport layer.

At step S140, a first sub-electrode layer and a second sub-electrode layer are formed on the first light-emitting structures to form a second electrode layer group. The first sub-electrode layer and the second sub-electrode layer are stacked. The second electrode layer group may be, for example, a cathode of the OLED device. Each first electrode, its corresponding first light-emitting structure, and its corresponding second electrode layer group form a first sub-pixel.

In this embodiment, forming the first sub-electrode layer includes forming electrode blocks spaced from each other. A position of each electrode block is corresponding to a position of at least one first electrode. Forming the second sub-electrode layer includes forming the second sub-electrode layer that can connect at least a part of adjacent electrode blocks. The light-transmitting performance of the second sub-electrode layer is greater than the 1 light-transmitting performance of the electrode blocks.

The order of forming the first sub-electrode layer and forming the second sub-electrode layer may be adjusted depending on process requirements. Optionally, the first sub-electrode layer may be formed before the second sub-electrode layer. In other embodiments, the second sub-electrode layer may be formed before the first sub-electrode layer.

Optionally, the first sub-electrode layer may be an ytterbium layer or a magnesium-silver alloy layer, so that the first sub-electrode layer, the first electrode and the layer structure therebetween can create a suitable microcavity effect. The displaying effect by the formed first sub-pixel can be improved, and the likelihood of occurrence of color shift can be reduced.

Optionally, the second sub-electrode layer may be an indium tin oxide layer or an indium zinc oxide layer, thereby improving the light-transmitting performance of the intervening regions between adjacent electrode blocks of the first sub-electrode layer.

Optionally, forming the second sub-electrode layer includes forming the second sub-electrode layer by electron beam vapor deposition, sputtering deposition, or thermal deposition.

In the method for manufacturing the light-transmitting display panel according to this embodiment of the present application, forming the first sub-electrode layer includes forming electrode blocks spaced from each other. The orthographic projection of each of the electrode blocks on the array substrate covers an orthographic projection of at least one first electrode on the array substrate, which ensures that the formed first sub-pixel has high color accuracy. The second sub-electrode layer connects at least a part of adjacent electrode blocks, and the light-transmitting performance of the second sub-electrode layer is greater than that of the electrode blocks, which improves light-transmitting performance of the non-luminous region around the sub-pixels while ensuring the normal displaying by the sub-pixels, thereby improving the average light-transmitting performance of the light-transmitting display panel.

Optionally, the second sub-electrode layer includes connecting blocks, and forming the second electrode layer group on the first light-emitting structure includes the following steps.

Vapor deposition is performed using a mask plate to form either of the electrode blocks or the connecting blocks on the first light-emitting structure. The mask plate includes multiple columns of openings arranged along a first direction. Each column of the multiple columns of openings includes multiple openings arranged at intervals along a second direction. The second direction is perpendicular to the first direction. A spacing between openings adjacent in the second direction is smaller than a length of an opening in the second direction.

For example, in this step, electrode blocks are formed on the first light-emitting structure. At this time, the electrode blocks are arranged in multiple columns, the multiple columns of electrode blocks are arranged along the first direction, and each column of the multiple columns of electrode blocks includes multiple electrode blocks arranged at intervals in the second direction.

Then, the mask plate is translated along the second direction by a preset distance, and vapor deposition is performed using the mask plate to form the other of the electrode blocks and the connecting blocks on the first light-emitting structure. The preset distance is greater than the spacing between the openings adjacent in the second direction and is less than the length of the opening in the second direction.

For example, in this step, the connecting block is formed. The connecting block connects electrode blocks adjacent in the second direction. A shape and a size of the orthographic projection of each connecting block on the array substrate are the same as a shape and a size of the orthographic projection of each electrode block on the array substrate.

Then, an electrical connecting structure143that connects connecting blocks142sadjacent in the first direction X can be formed. The electrical connecting structure143may also be formed by performing vapor deposition on a conductive material.

In the method for manufacturing the light-transmitting display panel according to the above embodiments, the first sub-electrode layer and the second sub-electrode layer can be formed by patterning using a same mask plate, which saves production costs and improves the manufacturing efficiency of the light-transmitting display panel.

The above-described embodiments of the present application do not exhaust all the details, and the present application are not limited to the specific embodiments described. It is apparent that, many modifications and changes can be made according to the above description. The selected and specifically described embodiments in the description are for better explanation of the principles and practical use of the present application, so that those skilled in the art can make good use of this application and make modifications on the basis of this application. The present application is only limited by the claims and their full scope and equivalents.