Display panel and manufacturing method thereof, and electronic device

Abstract

The present application provides a display panel and a preparation method thereof, and an electronic device. The display panel includes a display substrate and a touch electrode layer and a color film layer arranged on the light-emitting side of the display substrate. The touch electrode layer has a shading area and a light-transmitting area, wherein the touch electrode layer forms a touch electrode pattern in the shading area and forms a first opening in the light-transmitting area. The color film layer is arranged in the first opening, and in the second display area, a second opening is formed on the touch electrode pattern. The second opening can transmit ambient light to improve the light transmittance of the second display area, thereby solving the problem of poor light transmittance in the CUP area of ​​the existing display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a method for preparing the same, and an electronic device. Background Art

[0002] With the development of OLED technology, higher screen-to-body ratio and lower power consumption have become the research and development direction of many panel manufacturers. For this reason, technologies such as POL Less (depolarizer) technology and CUP (camera under panel) technology have emerged. Among them, POL Less technology uses color filters (Color Filter) to replace polarizers (POL) to improve the transmittance of the display panel and reduce power consumption. The color filter is composed of red (Red), green (Green), blue (Blue) color resistance and black matrix (Black Matrix, BM). The red, green and blue resistances are responsible for the light output of the R / G / B sub-pixel units of the corresponding light-emitting units, respectively, while BM is mainly responsible for shading to avoid light leakage from the display panel. CUP technology places the camera on the back of the display panel, so there is no need to dig holes in the display panel. The CUP area can both transmit light and form images, which can greatly increase the screen-to-body ratio of the display panel. However, the black matrix in the color filter prevents light leakage from the display panel while also blocking the light in the CUP area, affecting the light transmittance of the CUP area and making the photo-taking effect of the under-screen camera poor. Summary of the invention

[0003] The present application provides a display panel and a manufacturing method thereof, and an electronic device to alleviate the technical problem of poor light transmittance in a CUP area of ​​an existing display panel.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] An embodiment of the present application provides a display panel, comprising a first display area and a second display area arranged adjacent to each other, wherein the light transmittance of the first display area is less than the light transmittance of the second display area, and the display panel further comprises:

[0006] A display substrate, the display substrate having a light emitting side;

[0007] a touch electrode layer, disposed on the light-emitting side of the display substrate, the touch electrode layer having a light-shielding area and a light-transmitting area, wherein the touch electrode layer forms a touch electrode pattern in the light-shielding area and forms a first opening in the light-transmitting area; and

[0008] A color filter layer, arranged on the light-emitting side of the display substrate and located in the first opening;

[0009] Wherein, in the second display area, a second opening is formed on the touch electrode pattern, and the second opening is used to pass ambient light.

[0010] In the display panel provided in the embodiment of the present application, the touch electrode pattern includes cross-insulated first touch electrodes and second touch electrodes, and the second opening is arranged on the first touch electrode and / or the second touch electrode.

[0011] In the display panel provided in the embodiment of the present application, the orthographic projection of the second opening on the display substrate falls within the orthographic projection range of the first touch electrode or the second touch electrode on the display substrate.

[0012] In the display panel provided in the embodiment of the present application, the line width of the first touch electrode and the second touch electrode ranges from 4 microns to 5 microns.

[0013] In the display panel provided in the embodiment of the present application, the display panel further includes a bridging electrode located between the display substrate and the touch electrode layer, and one of the first touch electrode and the second touch electrode is electrically connected to the bridging electrode.

[0014] In the display panel provided in the embodiment of the present application, the orthographic projection of the second opening on the display substrate is separated from the orthographic projection of the bridging electrode on the display substrate.

[0015] In the display panel provided in the embodiment of the present application, the material of the touch electrode pattern includes at least one of a black conductive material and a conductive black paste.

[0016] The present application also provides a method for preparing a display panel, which includes:

[0017] Providing a display substrate, wherein the display substrate is divided into a first display area and a second display area;

[0018] A touch electrode layer is prepared on the display substrate, wherein the touch electrode layer has a light shielding area and a light transmitting area, wherein the touch electrode layer is provided with a touch electrode pattern in the light shielding area and a first opening in the light transmitting area, and a second opening is formed on the touch electrode pattern in the second display area to allow ambient light to pass through;

[0019] A color filter layer is prepared on the display substrate so that the color filter layer is located in the first opening.

[0020] In the method for manufacturing a display panel provided in an embodiment of the present application, the step of preparing a touch electrode layer on the display substrate includes:

[0021] Preparing a black conductive film layer with a film thickness of 3000 angstroms to 4000 angstroms on the display substrate;

[0022] The black conductive film layer is exposed, developed, and etched to form the touch electrode layer.

[0023] An embodiment of the present application also provides an electronic device, which includes an under-screen camera and a display panel of one of the aforementioned embodiments, wherein the under-screen camera is away from the light-emitting side of the display panel and is arranged corresponding to the second display area of ​​the display panel.

[0024] The beneficial effects of the present application are as follows: in the display panel, preparation method thereof and electronic device provided by the present application, the display panel includes a display substrate and a touch electrode layer and a color film layer arranged on the light-emitting side of the display substrate, the touch electrode layer having a shading area and a light-transmitting area, wherein the touch electrode layer forms a touch electrode pattern in the shading area, and forms a first opening in the light-transmitting area, the color film layer is arranged in the first opening, and in the second display area, a second opening is formed on the touch electrode pattern, the second opening can transmit ambient light to improve the light transmittance of the second display area, thereby solving the problem of poor light transmittance in the CUP area of ​​the existing display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of a top view structure of a display panel provided in an embodiment of the present application.

[0027] Figure 2 A schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present application.

[0028] Figure 3 A schematic diagram of a cross-sectional structure of a display substrate provided in an embodiment of the present application.

[0029] Figure 4 A schematic diagram of a cross-sectional structure of a touch electrode pattern provided in an embodiment of the present application.

[0030] Figure 5 A schematic diagram of a top view structure of a touch electrode pattern provided in an embodiment of the present application.

[0031] Figure 6Another schematic diagram of a top view of the touch electrode pattern provided in an embodiment of the present application.

[0032] Figure 7 A schematic diagram of the process of a display panel manufacturing method provided in an embodiment of the present application.

[0033] Figure 8 A schematic diagram of the cross-sectional structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in the present application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and regions is exaggerated for clear understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

[0035] Please refer to Figures 1 to 5 , Figure 1 A schematic diagram of a top view of the structure of a display panel provided in an embodiment of the present application is shown in FIG. Figure 2 A schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present application, Figure 3 A schematic cross-sectional structure diagram of a display substrate provided in an embodiment of the present application, Figure 4 A schematic cross-sectional structure diagram of a touch electrode pattern provided in an embodiment of the present application, Figure 5 A schematic diagram of a top view structure of a touch electrode pattern provided in an embodiment of the present application The display panel 100 comprises a first display area AA1 and a second display area AA2 which are adjacent to each other, and the light transmittance of the first display area AA1 is less than the light transmittance of the second display area AA2.

[0036] For example, Figure 1 As shown, the first display area AA1 surrounds the second display area AA2, and the first display area AA1 is the main display area of ​​the display panel 100, which is used to display images. The second display area AA2 is a functional area of ​​the display panel 100, which can not only display images, but also enable the display panel 100 to implement some non-display functions. For example, the second display area AA2 can also be used as an under-screen camera area, a fingerprint recognition area, and other functional areas. This embodiment of the application takes the second display area AA2 as an under-screen camera area as an example for explanation.

[0037] Reference Figure 2The display panel 100 further includes a display substrate 10 and a touch electrode layer 20 and a color filter layer 30 disposed on the display substrate 10. The display substrate 10 has a light-emitting side, and the light-emitting side of the display substrate 10 is also the side of the display panel 100 displaying the picture. The touch electrode layer 20 is disposed on the light-emitting side of the display substrate 10, and the touch electrode layer 20 has a light-shielding area SA and a light-transmitting area TA. The touch electrode layer 20 forms a touch electrode pattern 21 in the light-shielding area SA, and forms a first opening 22 in the light-transmitting area TA. The color filter layer 30 is disposed on the light-emitting side of the display substrate 10, and is located in the first opening 22.

[0038] In the second display area AA2, a second opening 23 is formed on the touch electrode pattern 21, and the second opening 23 is used to transmit ambient light. In this way, the present embodiment realizes the light shielding function by using the touch electrode pattern 21, so that there is no need to set a black matrix light shielding. At the same time, by setting the second opening 23 on the touch electrode pattern 21, the light transmittance of the second display area AA2 is improved, thereby solving the problem of poor light transmittance of the CUP area due to the light shielding of the black matrix in the existing display panel.

[0039] The structure of the display panel 100 of the present application will be described below through specific implementations:

[0040] Reference Figure 2 and Figure 3 The display substrate 10 includes a substrate 11 and a driving circuit layer 12 , a light-emitting functional layer 13 , and a packaging layer 14 stacked on the substrate 11 .

[0041] Optionally, the material of the substrate 11 includes flexible materials such as polyimide (PI). A flexible display panel can be manufactured by using a flexible material as the substrate 11 to achieve special properties of the display panel 100 such as bending and curling.

[0042] Optionally, a buffer layer 111 may be disposed between the substrate 11 and the driving circuit layer 12. The material of the buffer layer 111 may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiON) and other inorganic materials, the buffer layer 111 can prevent unwanted impurities or contaminants (such as moisture, oxygen, etc.) from diffusing from the substrate 11 to the device that may be damaged by these impurities or contaminants, while also providing a flat top surface.

[0043] The driving circuit layer 12 includes an active layer 121, a gate insulating layer 122, a gate 123, an interlayer insulating layer 124, a source-drain layer 125, and a planarization layer 126, which are sequentially stacked on the buffer layer 111. The active layer 121 includes a channel region 1211 and a source doping region 1212 and a drain doping region 1213 located on both sides of the channel region 1211. The gate insulating layer 122 covers the active layer 121 and the buffer layer 111, and the gate 123 is disposed on the gate insulating layer 122, and the gate 123 is disposed corresponding to the channel region 1211 of the active layer 121.

[0044] The interlayer insulating layer 124 covers the gate 123 and the gate insulating layer 122, and the source-drain electrode layer 125 is disposed on the interlayer insulating layer 124. The source-drain electrode layer 125 includes a source electrode 1251 and a drain electrode 1252, and the source electrode 1251 and the drain electrode 1252 are respectively connected to the source doping region 1212 and the drain doping region 1213 of the active layer 121 through via holes of the interlayer insulating layer 124. The planarizing layer 126 is disposed on the source-drain electrode layer 125 to provide a flat surface for the driving circuit layer 12.

[0045] The driving circuit layer 12 is used to provide a driving voltage to the light-emitting functional layer 13 so that the light-emitting devices of the light-emitting functional layer 13 emit light. Optionally, the light-emitting devices of the light-emitting functional layer 13 include a red light-emitting device R, a green light-emitting device G, and a blue light-emitting device B, and light-emitting devices of different colors emit light of different colors to achieve color display of the display panel 100. Each light-emitting device is a sub-pixel, and the structure of the light-emitting functional layer 13 is specifically described below by taking the red light-emitting device R as an example:

[0046] The light-emitting functional layer 13 includes a first electrode 131, a pixel definition layer 132, a red light-emitting device R, and a second electrode 133. The first electrode 131 is disposed on the surface of the planarization layer 126 and is connected to the source electrode 1251 or the drain electrode 1252 through a via hole in the planarization layer 126. Figure 3 As shown, the first electrode 131 is connected to the drain electrode 1252. The pixel definition layer 132 is disposed on the first electrode 131 and the planarization layer 126, and the pixel definition layer 132 is patterned to form a pixel opening, and the pixel opening exposes a portion of the first electrode 131 to define a setting area of ​​the red light emitting device R.

[0047] The second electrode 133 covers the red light emitting device R, and the red light emitting device R emits light under the joint action of the first electrode 131 and the second electrode 133. Optionally, the first electrode 131 is an anode, and the second electrode 133 is a cathode, but the present application is not limited thereto. For example, the first electrode 131 of the present application may also be a cathode, and correspondingly, the second electrode 133 is an anode.

[0048] Optionally, the light-emitting functional layer 13 may also include a hole injection layer (HIL) and a hole transport layer (HTL) arranged between the red light-emitting device R and the first electrode 131; and an electron injection layer (EIL) and an electron transport layer (ETL) arranged between the red light-emitting device R and the second electrode 133.

[0049] The encapsulation layer 14 is coated on the light-emitting functional layer 13 to protect the light-emitting device of the light-emitting functional layer 13 and prevent the light-emitting device from failing due to water and oxygen intrusion. Optionally, the encapsulation layer 14 is a thin film encapsulation, for example, the encapsulation layer 14 can be a laminated structure formed by sequentially stacking three thin films of a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, or a laminated structure formed by more layers.

[0050] The touch electrode layer 20 is disposed on the packaging layer 14 to adopt a DOT (Direct On Cell Touch) touch solution, thereby eliminating the need for an external touch panel, reducing the thickness of the display panel 100 and improving the integration of the display panel 100 .

[0051] In some embodiments, a first insulating layer 40 may be further disposed on the encapsulation layer 14, and the touch electrode layer 20 is disposed on the first insulating layer 40. The first insulating layer 40 can protect the encapsulation layer 14, and prevent the encapsulation layer 14 from being damaged when preparing the touch electrode layer 20, thereby preventing the encapsulation layer 14 from failing. At the same time, the first insulating layer 40 can also provide a flat surface, which is conducive to the preparation of the touch electrode layer 20.

[0052] In one embodiment, in conjunction with reference Figure 2 and Figure 4 The touch electrode layer 20 has a light shielding area SA and a light transmitting area TA. The touch electrode layer 20 forms a touch electrode pattern 21 in the light shielding area SA, that is, the setting area of ​​the touch electrode pattern 21 is the light shielding area SA. The touch electrode pattern 21 is used to realize the touch function of the display panel 100. At the same time, the touch electrode pattern 21 also has a light shielding function to prevent the display panel 100 from leaking light and reduce the reflectivity of the display panel 100.

[0053] Optionally, the material of the touch electrode pattern 21 includes at least one of a black conductive material and a conductive black paste. For example, the touch electrode pattern 21 is a black conductive film layer formed by a black conductive material, and the black conductive film layer includes a composite film layer formed by a metal and a black metal oxide. When the touch electrode pattern 21 is formed by the black conductive film layer, the thickness of the touch electrode pattern 21 ranges from 3000 angstroms to 4000 angstroms.

[0054] Alternatively, the touch electrode pattern 21 is formed by a conductive black paste, and the conductive black paste includes a black carbon paste, a black silver paste, etc. When the touch electrode pattern 21 is formed by the conductive black paste, the thickness of the touch electrode pattern 21 is in a range of 1 micrometer to 1.5 micrometers. Of course, the material of the touch electrode pattern 21 is not limited thereto, and the material of the touch electrode pattern 21 can be conductive, black, light-shielding, and have a diffuse reflection function on the surface.

[0055] Specifically, refer to Figure 4 and Figure 5 The touch electrode pattern 21 includes a first touch electrode 211 and a second touch electrode 212 that are cross-insulated. The first touch electrode 211 and the second touch electrode 212 are arranged in the same layer to achieve same-layer mutual capacitance touch. To avoid short circuits between the first touch electrode 211 and the second touch electrode 212 at the intersection, the display panel 100 also includes a bridge electrode 50 located between the display substrate 10 and the touch electrode layer 20. One of the first touch electrode 211 and the second touch electrode 212 is electrically connected to the bridge electrode 50. This embodiment takes the electrical connection between the first touch electrode 211 and the bridge electrode 50 as an example for explanation.

[0056] Specifically, in order to realize the cross-insulation setting of the first touch electrode 211 and the second touch electrode 212 in the same layer, the first touch electrode 211 is cut off by the second touch electrode 212, and the cut off first touch electrode 211 is electrically connected through the bridge electrode 50. The bridge electrode 50 is arranged on the first insulating layer 40, and a second insulating layer 60 is further arranged between the bridge electrode 50 and the first touch electrode 211, and the first touch electrode 211 is electrically connected to the bridge electrode 50 through a via hole on the second insulating layer 60. Optionally, the first touch electrode 211 is a driving electrode, and the second touch electrode 212 is a sensing electrode. Of course, the present application is not limited thereto.

[0057] In other embodiments, the first touch electrodes 211 and the second touch electrodes 212 may be arranged in different layers to implement double-layer mutual capacitive touch, which will not be described in detail herein.

[0058] Further, the touch electrode layer 20 is formed with a first opening 22 in the light-transmitting area TA, that is, the area where the first opening 22 is set is the light-transmitting area TA. In other words, the area surrounded by the first touch electrode 211 and the second touch electrode 212 is the area where the first opening 22 is set, and the range of the light-transmitting area TA is limited by the range of the first opening 22. The first opening 22 is used to allow the light emitted by the light-emitting device to pass through. Each first opening 22 corresponds to one of the light-emitting devices, for example, the red light-emitting device R corresponds to one of the first openings 22, the green light-emitting device G corresponds to one of the first openings 22, and the blue light-emitting device B corresponds to one of the first openings 22. There is a gap between adjacent light-emitting devices, and the touch electrode pattern 21 is set corresponding to the gap between the light-emitting devices.

[0059] The color filter layer 30 is arranged in the first opening 22 to filter the light emitted by the light emitting device. The color filter layer 30 includes a red color filter 31, a green color filter 32 and a blue color filter 33. The color filters of different colors are located in different first openings 22, and each color filter is located in one first opening 22. For example, the red color filter 31 is located in one first opening 22, the green color filter 32 is located in one first opening 22, and the blue color filter 33 is located in one first opening 22.

[0060] Correspondingly, the red color filter 31 is arranged corresponding to the red light emitting device R, the green color filter 32 is arranged corresponding to the green light emitting device G, and the blue color filter 33 is arranged corresponding to the blue light emitting device B. Color filters of different colors allow light of the corresponding color to pass through, while blocking light of other colors from passing through. For example, the red color filter 31 allows the red light emitted by the red light emitting device R arranged corresponding to it to pass through, while blocking light of other colors from passing through.

[0061] The color film layer 30 is located in the first opening 22, so that the color film layer 30 is separated by the touch electrode pattern 21. The touch electrode pattern 21 has a shading function while realizing the touch function, which can prevent the display panel 100 from leaking light and reduce the reflectivity of the display panel 100. There is no need to set a black matrix shading, which saves the process of preparing the black matrix and saves costs.

[0062] In addition, it is understandable that, since the touch electrode pattern 21 has a light shielding function, it can prevent the display panel 100 from leaking light, but for the second display area AA2, the light shielding function of the touch electrode pattern 21 affects the light transmittance of the second display area AA2, so that the under-screen camera function of the second display area AA2 is affected. To this end, the display panel 100 of the present application has a second opening 23 formed on the touch electrode pattern 21 in the second display area AA2, and the second opening 23 is used to transmit ambient light. Ambient light can enter the display panel 100 through the second opening 23, thereby improving the light transmittance of the second display area AA2, so that the second display area AA2 can achieve compatibility between the touch function and the under-screen camera function.

[0063] Specifically, the second opening 23 is disposed on the first touch electrode 211 and / or the second touch electrode 212. Figure 5 As shown, this embodiment takes the second opening 23 being arranged on the second touch electrode 212 as an example, and each of the second touch electrodes 212 is provided with a plurality of second openings 23, and each of the second openings 23 is located near the intersection of the first touch electrode 211 and the second touch electrode 212, so that the second openings 23 are away from the light emitting area of ​​the light-emitting device, so as to reduce the influence of the second openings 23 on the shading function of the touch electrode pattern 21.

[0064] It is understandable that a bridging electrode 50 is disposed at the intersection of the first touch electrode 211 and the second touch electrode 212. In order to prevent the bridging electrode 50 from blocking the second opening 23, the second opening 23 is also disposed away from the bridging electrode 50. For example, the orthographic projection of the second opening 23 on the display substrate 10 is separated from the orthographic projection of the bridging electrode 50 on the display substrate 10, that is, the orthographic projection of the second opening 23 on the display substrate 10 and the orthographic projection of the bridging electrode 50 on the display substrate 10 have no overlapping part.

[0065] Optionally, the orthographic projection of the second opening 23 on the display substrate 10 falls within the orthographic projection range of the second touch electrode 212 on the display substrate 10, so that the size of the second opening 23 is smaller than the line width of the second touch electrode 212 to avoid disconnection of the second touch electrode 212. The size of the second opening 23 is related to the shape of the second opening 23. For example, if the second opening 23 is a circular hole, the diameter of the second opening 23 is smaller than the line width of the second touch electrode 212, and the line width of the second touch electrode 212 ranges from 4 microns to 5 microns. Of course, the shape of the second opening 23 also includes square, elliptical or other irregular shapes.

[0066] In one embodiment, referring to Figures 1 to 6 , Figure 6 Another schematic diagram of a top view of a touch electrode pattern provided in an embodiment of the present application. Different from the above embodiment, the second opening 23 is also provided on the first touch electrode 211. Similarly, in order to avoid disconnecting the first touch electrode 211 due to the provision of the second opening 23, the size of the second opening 23 is smaller than the line width of the first touch electrode 211, so that the orthographic projection of the second opening 23 on the display substrate 10 falls within the orthographic projection range of the first touch electrode 211 on the display substrate 10, and the line width range of the first touch electrode 211 is 4 microns to 5 microns.

[0067] Furthermore, since the first touch electrode 211 is bridged by the bridging electrode 50, in order to avoid the influence of the bridging electrode 50 on the second opening 23, the second opening 23 on the first touch electrode 211 is located away from the bridging electrode 50, so that the orthographic projection of the second opening 23 on the display substrate 10 is separated from the orthographic projection of the bridging electrode 50 on the display substrate 10, that is, the orthographic projection of the second opening 23 on the display substrate 10 and the orthographic projection of the bridging electrode 50 on the display substrate 10 have no overlapping part. For other descriptions, please refer to the above embodiment, which will not be repeated here.

[0068] In some other embodiments, the second opening 23 may also be disposed on the first touch electrode 211 but not on the second touch electrode 212 , which can also improve the light transmittance of the second display area AA2 .

[0069] In one embodiment, see Figures 1 to 7 , Figure 7 The present invention provides a flow chart of a method for manufacturing a display panel according to an embodiment of the present invention. The method for manufacturing a display panel comprises the following steps:

[0070] S301: providing a display substrate 10, wherein the display substrate 10 is divided into a first display area AA1 and a second display area AA2;

[0071] Specifically, refer to Figure 2 The display substrate 10 includes a substrate 11 and a driving circuit layer 12, a light-emitting functional layer 13, and a packaging layer 14 stacked on the substrate 11. The display substrate 10 is divided into a first display area AA1 and a second display area AA2, and the transmittance of the first display area AA1 is less than the transmittance of the second display area AA2.

[0072] S302: preparing a touch electrode layer 20 on the display substrate 10, wherein the touch electrode layer 20 has a light shielding area SA and a light transmission area TA, wherein the touch electrode layer 20 forms a touch electrode pattern 21 in the light shielding area SA, and forms a first opening 22 in the light transmission area TA, and at the same time, in the second display area AA2, a second opening 23 is formed on the touch electrode pattern 21 to allow ambient light to pass through;

[0073] Specifically, the step of preparing the touch electrode layer 20 on the display substrate 10 includes preparing a black conductive film layer with a film thickness of 3000 angstroms to 4000 angstroms on the display substrate 10 , and exposing, developing, and etching the black conductive film layer to form the touch electrode layer 20 .

[0074] Specifically, referring to Figure 2 and Figure 4 , preparing a first insulating layer 40 on the encapsulation layer 14 on the display substrate 10 , preparing a first metal film on the first insulating layer 40 , and patterning the first metal film to form a bridging electrode 50 .

[0075] A second insulating layer 60 is formed on the bridge electrode 50 and the first insulating layer 40, and a black conductive film layer is formed on the second insulating layer 60. The black conductive film layer includes a composite film layer of metal and black metal oxide, etc. The thickness of the black conductive film layer ranges from 3000 angstroms to 4000 angstroms.

[0076] Reference Figure 5 , then the black conductive film layer is exposed, developed, and etched to form a first opening 22, a second opening 23, and a touch electrode pattern 21 as the touch electrode layer 20. Specifically, the touch electrode layer 20 has a light shielding area SA and a light transmission area TA, wherein the touch electrode layer 20 is formed with a touch electrode pattern 21 in the light shielding area SA, and a first opening 22 is formed in the light transmission area TA, and at the same time, in the second display area AA2, a second opening 23 is formed on the touch electrode pattern 21 to allow ambient light to pass through.

[0077] The touch electrode pattern 21 includes first touch electrodes 211 extending in a first direction and second touch electrodes 212 extending in a second direction, the first touch electrodes 211 and the second touch electrodes 212 are cross-insulated and arranged, and the line width of the first touch electrodes 211 and the second touch electrodes 212 are both in the range of 4 micrometers to 5 micrometers.

[0078] In another embodiment, the touch electrode layer 20 may be prepared by coating a conductive black paste on the second insulating layer 60 to form a conductive film with a thickness of 1 micrometer to 1.5 micrometers, wherein the conductive black paste includes a black carbon paste, a black silver paste, etc. Then, the conductive film is exposed and developed to form the touch electrode layer 20.

[0079] S303 : preparing a color filter layer 30 on the display substrate 10 , so that the color filter layer 30 is located in the first opening 22 .

[0080] Specifically, the step of preparing the color filter layer 30 on the display substrate 10 includes: preparing a red color resist on the display substrate 10, exposing and developing the red color resist to form a red color filter 31, and the red color filter 31 is located in the first opening 22; preparing a green color resist on the display substrate 10, exposing and developing the green color resist to form a green color filter 32, and the green color filter 32 is located in the first opening 22; preparing a blue color resist on the display substrate 10, exposing and developing the blue color resist to form a blue color filter 33, and the blue color filter 33 is located in the first opening 22. The red color filter 31, the green color filter 32, and the blue color filter 33 are respectively located in different first openings 22, such as Figure 2 shown.

[0081] The color film layer 30 is located in the first opening 22, so that the color film layer 30 is separated by the touch electrode pattern 21. The touch electrode pattern 21 has a shading function while realizing the touch function, which can prevent the display panel 100 from leaking light and reduce the reflectivity of the display panel 100. There is no need to set a black matrix shading, which saves the process of preparing the black matrix and saves costs.

[0082] Based on the same inventive concept, the present application embodiment also provides an electronic device, referring to Figures 1 to 8 , Figure 8 The cross-sectional structure diagram of the electronic device provided in the embodiment of the present application. The electronic device 1000 includes an under-screen camera 200 and a display panel 100 of one of the aforementioned embodiments, wherein the under-screen camera 200 is away from the light-emitting side of the display panel 100 and is disposed corresponding to the second display area AA2 of the display panel 100. The electronic device 1000 includes electronic devices such as mobile phones, tablets, and televisions.

[0083] According to the above embodiments, it can be seen that:

[0084] In the display panel, preparation method thereof and electronic device provided by the present application, the display panel includes a display substrate and a touch electrode layer and a color film layer arranged on the light-emitting side of the display substrate, the touch electrode layer having a shading area and a light-transmitting area, wherein the touch electrode layer forms a touch electrode pattern in the shading area and forms a first opening in the light-transmitting area, the color film layer is arranged in the first opening, and in the second display area, a second opening is formed on the touch electrode pattern, the second opening can transmit ambient light to improve the light transmittance of the second display area, thereby solving the problem of poor light transmittance in the CUP area of ​​the existing display panel.

[0085] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises a first display area and a second display area which are adjacent to each other, wherein the light transmittance of the first display area is less than the light transmittance of the second display area, and the display panel further comprises: A display substrate, the display substrate having a light emitting side; a touch electrode layer, disposed on the light-emitting side of the display substrate, the touch electrode layer having a light-shielding area and a light-transmitting area, wherein the touch electrode layer forms a touch electrode pattern in the light-shielding area and forms a first opening in the light-transmitting area; and A color filter layer, arranged on the light-emitting side of the display substrate and located in the first opening; Wherein, in the second display area, a second opening is formed on the touch electrode pattern, and the second opening is used to transmit ambient light; the material of the touch electrode pattern includes at least one of a black conductive material and a conductive black paste.

2. The display panel according to claim 1, characterized in that: The touch electrode pattern includes first touch electrodes and second touch electrodes that are cross-insulated, and the second opening is arranged on the first touch electrodes and / or the second touch electrodes.

3. The display panel according to claim 2, characterized in that: The orthographic projection of the second opening on the display substrate falls within the orthographic projection range of the first touch electrode or the second touch electrode on the display substrate.

4. The display panel according to claim 2, characterized in that: The line width of the first touch electrode and the second touch electrode ranges from 4 micrometers to 5 micrometers.

5. The display panel according to claim 2, characterized in that: The display panel further includes a bridging electrode located between the display substrate and the touch electrode layer, and one of the first touch electrode and the second touch electrode is electrically connected to the bridging electrode.

6. The display panel according to claim 5, characterized in that: An orthographic projection of the second opening on the display substrate is separated from an orthographic projection of the bridging electrode on the display substrate.

7. A method for preparing a display panel, characterized in that: For preparing a display panel according to any one of claims 1 to 6, the preparation method comprising: Providing a display substrate, wherein the display substrate is divided into a first display area and a second display area; A touch electrode layer is prepared on the display substrate, wherein the touch electrode layer has a light shielding area and a light transmitting area, wherein the touch electrode layer is provided with a touch electrode pattern in the light shielding area and a first opening in the light transmitting area, and a second opening is formed on the touch electrode pattern in the second display area to allow ambient light to pass through; A color filter layer is prepared on the display substrate so that the color filter layer is located in the first opening.

8. The method for preparing a display panel according to claim 7, characterized in that: The step of preparing a touch electrode layer on the display substrate comprises: Preparing a black conductive film layer with a film thickness of 3000 angstroms to 4000 angstroms on the display substrate; The black conductive film layer is exposed, developed, and etched to form the touch electrode layer.

9. An electronic device, characterized in that: It comprises an under-screen camera and a display panel as described in any one of claims 1 to 6, wherein the under-screen camera is away from the light-emitting side of the display panel and is arranged corresponding to the second display area of ​​the display panel.

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