Display panel, manufacturing method thereof, and display device

Abstract

The present disclosure provides a display panel and its manufacturing method, and a display device, which relate to the field of display technology. The display panel includes: a driving backplane, a light-emitting layer and a photoelectric sensing layer; the light-emitting device includes a first electrode layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer; the first electrode layer includes an exposed area and a covering area covered by the pixel definition layer, and the minimum width of the covering area included by the first type of light-emitting device is not less than the maximum width of the covering area included by the second type of light-emitting device, and the maximum width of the covering area included by the first type of light-emitting device is greater than the maximum width of the covering area included by the second type of light-emitting device. In the embodiment of the present disclosure, the covering area of ​​the first electrode layer included in the first type of light-emitting device is increased, thereby increasing the shielding area of ​​the first electrode layer included in the first type of light-emitting device against light leakage. In this way, the interference signal received by the photoelectric sensing layer is reduced, thereby improving the accuracy of fingerprint recognition.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] In-display fingerprint recognition is a new technology that uses a fingerprint sensor placed beneath the screen to identify and unlock the device based on light reflected from your finger. Compared to traditional fingerprint recognition, in-display fingerprint recognition eliminates the need for a separate fingerprint recognition window, significantly increasing the screen-to-body ratio and delivering stunning visuals and an exceptional user experience.

[0003] However, when using an under-display fingerprint sensor, some of the light emitted by the screen is not reflected by the finger, but is reflected by some of the screen's film layers and reaches the fingerprint sensor behind the screen. This light is called light leakage. Because this light does not receive fingerprint information, it is an interference signal for the fingerprint sensor, resulting in lower fingerprint sensor recognition accuracy.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a display panel and its manufacturing method, and a display device, which can improve the accuracy of under-screen fingerprint recognition.

[0006] According to a first aspect of the present disclosure, a display panel is provided, comprising a display area, wherein the display area includes a fingerprint recognition area, and the display panel includes:

[0007] Driver backplane;

[0008] a light-emitting layer located on one side of the driving backplane and having a light-emitting device formed thereon, the light-emitting device comprising a first electrode layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer sequentially distributed in a direction away from the driving backplane;

[0009] The pixel definition layer has an opening, the first electrode layer includes an exposed area exposed at the opening and a covered area covered by the pixel definition layer, the plurality of light-emitting devices located at least in the fingerprint recognition area include a first type of light-emitting device and a second type of light-emitting device, the minimum width of the covered area of ​​the first type of light-emitting device is not less than the maximum width of the covered area of ​​the second type of light-emitting device, and the maximum width of the covered area of ​​the first type of light-emitting device is greater than the maximum width of the covered area of ​​the second type of light-emitting device;

[0010] The photoelectric sensing layer is located on a side of the driving back plate away from the light-emitting layer, and is at least partially located in the fingerprint recognition area.

[0011] According to any display panel described in the present disclosure, the coverage area includes an annular area, and the width of the annular area of ​​the first type of light-emitting device is greater than the width of the annular area included in the second type of light-emitting device.

[0012] According to any display panel described in the present disclosure, the difference between the width of the annular region of the first type of light-emitting device and the width of the annular region included in the second type of light-emitting device is greater than or equal to 1 micron.

[0013] According to any display panel described in the present disclosure, the width of the annular area of ​​the first type of light-emitting device is greater than or equal to 3 micrometers and less than or equal to 5 micrometers.

[0014] According to any display panel of the present disclosure, the coverage area of ​​the first type of light-emitting device includes an annular area and a plurality of extended areas located on a side of the annular area away from the exposed area and spaced apart, and the coverage area of ​​the second type of light-emitting device includes the annular area;

[0015] The width of the annular region of the first type of light emitting device is greater than or equal to the width of the annular region included in the second type of light emitting device.

[0016] According to any display panel described in the present disclosure, the projection of the extension area on the driving backplane is a rectangle.

[0017] According to any display panel described in the present disclosure, the first type of light-emitting device includes a first electrode layer including a first conductive film layer, a second conductive film layer and a third conductive film layer sequentially distributed in a direction away from the driving backplane;

[0018] An outer contour of an orthographic projection of at least one of the first conductive film layer and the third conductive film layer on the driving backplane is located within an orthographic projection of the second conductive film layer on the driving backplane.

[0019] According to any one of the display panels of the present disclosure, the plurality of light-emitting devices include a green light-emitting device, a red light-emitting device, and a blue light-emitting device;

[0020] The first type of light emitting devices includes green light emitting devices, and the second type of light emitting devices includes red light emitting devices and blue light emitting devices.

[0021] According to a second aspect of the present disclosure, a method for manufacturing a display panel is provided, comprising:

[0022] Acquire multiple design layouts, wherein the multiple design layouts include at least an active layer design layout, a gate metal layer design layout, a source / drain metal layer design layout, and a first electrode layer design layout;

[0023] Manufacturing a driving backplane according to the active layer design layout, the gate metal layer design layout, and the source / drain metal layer design layout;

[0024] According to the design layout of the first electrode layer, a plurality of first electrode layers distributed at intervals are formed on one side of the driving backplane through a mask;

[0025] A pixel definition layer, an organic light emitting layer, and a second electrode layer are sequentially formed on a side of the first electrode layer away from the driving backplane;

[0026] A photoelectric sensing layer is formed on a side of the driving backplane away from the first electrode layer;

[0027] In which, the pixel definition layer has an opening, the first electrode layer includes an exposed area exposed at the opening and a covering area surrounding the exposed area, the multiple first electrode layers include a first type of electrode layer and a second type of electrode layer, the minimum width of the covering area included in the first type of electrode layer is not less than the maximum width of the covering area included in the second type of electrode layer, and the maximum width of the covering area included in the first type of electrode layer is greater than the maximum width of the covering area included in the second type of electrode layer.

[0028] According to any method of the present disclosure, before designing a layout based on the first electrode layer and manufacturing a plurality of first electrode layers spaced apart on one side of the driving backplane using a mask, the method includes:

[0029] Acquiring structural parameters of the mask, wherein the mask has a plurality of mask openings corresponding to the first electrode layer one by one, and the structural parameters include opening sizes of the mask openings;

[0030] Determining a target mask opening corresponding to a target electrode layer, and determining an opening area of ​​the target mask opening according to an opening size of the target mask opening, wherein the target electrode layer refers to any first electrode layer included in the first type of electrode layer;

[0031] Determine a layout projection area on the plane where the mask is located after the active layer design layout, the gate metal layer design layout, the source and drain metal layer design layout and the first electrode layer design layout are superimposed;

[0032] Determine the projection area of ​​the layout projection area within the area where the target mask opening is located, and determine the light leakage ratio of the light-emitting device corresponding to the target electrode layer according to the opening area and the projection area according to the following formula;

[0033] R=(S 1 -S 2 ) / S1

[0034] Wherein, R refers to the light leakage ratio of the light-emitting device corresponding to the target electrode layer, S1 refers to the opening area, and S2 refers to the projected area;

[0035] When the light leakage ratio is greater than the light leakage ratio threshold, adjust the first electrode layer design layout and the opening size of the mask opening on the mask plate, and return to the above step to determine the opening area of ​​the target mask opening according to the opening size of the target mask opening until the light leakage ratio is less than or equal to the light leakage ratio threshold, and perform the above steps according to the first electrode layer design layout and mask plate after the last adjustment. According to the first electrode layer design layout, a plurality of spaced first electrode layers are produced on one side of the driving backplane through a mask plate.

[0036] According to a third aspect of the present disclosure, a display device is provided, comprising the display panel described in the first aspect.

[0037] The embodiments of the present disclosure include at least the following technical effects:

[0038] In the disclosed embodiment, the minimum width of the coverage area of ​​the first-type light-emitting device is not less than the maximum width of the coverage area of ​​the second-type light-emitting device, and the maximum width of the coverage area of ​​the first-type light-emitting device is greater than the maximum width of the coverage area of ​​the second-type light-emitting device. This increases the coverage area of ​​the first electrode layer of the first-type light-emitting device compared to the coverage area of ​​the first electrode layer of the second-type light-emitting device, thereby increasing the area of ​​light leakage blocked by the first electrode layer of the first-type light-emitting device. Thus, during the application of the display panel, the intensity of light leakage reaching the photoelectric sensing layer is reduced, which in turn reduces the interference signal received by the photoelectric sensing layer, thereby improving the accuracy of fingerprint recognition.

[0039] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0041] Figure 1 A schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present disclosure.

[0042] Figure 2 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure.

[0043] Figure 3 A schematic top view of the structure of a first electrode layer provided in an embodiment of the present disclosure.

[0044] Figure 4 A schematic top view of another first electrode layer provided in an embodiment of the present disclosure.

[0045] Figure 5 A schematic diagram of the cross-sectional structure of a first electrode layer provided in an embodiment of the present disclosure.

[0046] Figure 6 A schematic diagram of a rear front view of a display panel provided in an embodiment of the present disclosure.

[0047] Figure 7 A schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present disclosure is provided.

[0048] Figure 8 A schematic diagram of an active layer design layout provided in an embodiment of the present disclosure.

[0049] Figure 9 A schematic diagram of a gate metal layer design layout provided in an embodiment of the present disclosure.

[0050] Figure 10 A schematic diagram of a source-drain metal layer design layout provided in an embodiment of the present disclosure.

[0051] Figure 11 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present disclosure.

[0052] Reference numerals:

[0053] 1. Driving backplane; 2. Light-emitting layer; 3. Photoelectric sensing layer; 4. Encapsulation layer; 5. Polarizer; 6. Cover plate; 7. Adhesive;

[0054] 11. Substrate; 12. Active layer; 13. First gate insulating layer; 14. Gate metal layer; 15. Second gate insulating layer; 16. Source / drain metal layer; 17. Planarization layer;

[0055] 21. First electrode layer; 22. Pixel definition layer; 23. Organic light-emitting layer; 24. Second electrode layer; 25. First type of light-emitting device; 26. Second type of light-emitting device;

[0056] 211, exposed area; 212, covered area; 214, first conductive film layer; 215, second conductive film layer; 216, third conductive film layer;

[0057] 2121. Ring area; 2122. Extension area. DETAILED DESCRIPTION

[0058] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many 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 concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0059] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0060] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0061] The present disclosure provides a display panel having a display area, wherein the display area includes a fingerprint recognition area. Figure 1 As shown, the display panel includes: a driving backplane 1, a light-emitting layer 2 and a photoelectric sensing layer 3; the light-emitting layer 2 is located on one side of the driving backplane 1 and is formed with multiple light-emitting devices; the photoelectric sensing layer 3 is located on the side of the driving backplane 1 away from the light-emitting layer 2, and is at least partially located in the fingerprint recognition area.

[0062] like Figure 1As shown, the light-emitting device includes a first electrode layer 21, a pixel definition layer 22, an organic light-emitting layer 23 and a second electrode layer 24, which are sequentially distributed along a direction away from the driving backplane 1; the pixel definition layer 22 has an opening, and the first electrode layer 21 includes an exposed area 211 exposed at the opening and a covering area 212 covered by the pixel definition layer 22. At least a plurality of light-emitting devices located in the fingerprint recognition area include a first type of light-emitting device 25 and a second type of light-emitting device 26, and the minimum width of the covering area 212 included in the first type of light-emitting device 25 is not less than the maximum width of the covering area 212 included in the second type of light-emitting device 26, and the maximum width of the covering area 212 included in the first type of light-emitting device 25 is greater than the maximum width of the covering area 212 included in the second type of light-emitting device 26.

[0063] In the disclosed embodiment, the footprint 212 of the first electrode layer 21 of the first type light-emitting device 25 is increased compared to the footprint 212 of the first electrode layer 21 of the second type light-emitting device 26, thereby increasing the area of ​​light leakage blocked by the first electrode layer 21 of the first type light-emitting device 25. Thus, during the use of the display panel, the intensity of light leakage reaching the photoelectric sensing layer 4 is reduced, which in turn reduces the interference signal received by the photoelectric sensing layer 3, thereby improving the accuracy of fingerprint recognition.

[0064] Among them, Figure 2 As shown, the driving backplane 1 includes a substrate 11 and a driving layer located on one side of the substrate 11, the driving layer is formed with pixel circuits corresponding one to one to multiple light-emitting devices, the light-emitting layer 2 is located on the side of the driving layer away from the substrate 11, and the first electrode layer 21 of each light-emitting device is electrically connected to the corresponding pixel circuit.

[0065] The specific structure of the driver layer can refer to the relevant technology. For example, Figure 2 As shown, the driving layer includes an active layer 12, a first gate insulating layer 13, a gate metal layer 14, a second gate insulating layer 15, a source-drain metal layer 16, and a planar layer 17, which are sequentially distributed in a direction away from the substrate 11. The source-drain metal layer 16 includes a source electrode and a drain electrode, and the first electrode layer 21 of each light-emitting device is electrically connected to the source electrode or the drain electrode.

[0066] In combination with the above, the light-emitting device includes a first electrode layer 21, a pixel definition layer 22, an organic light-emitting layer 23, and a second electrode layer 24. The first electrode layer 21 can be an opaque anode layer, and the second electrode layer 24 can be a light-transmitting cathode layer. The first electrode layers 21 of multiple light-emitting devices are independent of each other, and the second electrode layers 24 of multiple light-emitting devices are connected together, forming a single, solid-surface structure. The organic light-emitting layer 23 can be a red, green, or blue organic light-emitting layer, and the organic light-emitting layers 23 of multiple light-emitting devices are not all identical. That is, the organic light-emitting layer 23 of some light-emitting devices is a red organic light-emitting layer, the organic light-emitting layer 23 of some light-emitting devices is a green organic light-emitting layer, and the organic light-emitting layer 23 of some light-emitting devices is a blue organic light-emitting layer.

[0067] The photoelectric sensing layer 3 can be formed of multiple film layers. For details, please refer to the relevant art. Of course, in addition to being formed on the side of the driver backplane 1 facing away from the light-emitting layer 2, the photoelectric sensing layer 3 can also be formed by the driver backplane 1. This embodiment of the present disclosure does not limit this. In addition, in some embodiments, the photoelectric sensing layer 3 can also be a fingerprint recognition sensor. This embodiment of the present disclosure does not limit this.

[0068] In the embodiment of the present disclosure, Figure 1 As shown, the display panel further includes an encapsulation layer 4 , a polarizer 5 and a cover plate 6 located on a side of the light-emitting layer 2 away from the driving backplane 1 and sequentially distributed along a direction away from the light-emitting layer 2 .

[0069] The specific structures of the encapsulation layer 4, the polarizer 5 and the cover plate 6 can refer to the relevant technologies, such as Figure 1 As shown, the polarizer 5 and the cover plate 6 are bonded together by an adhesive 7 (such as OCA). For example, the encapsulation layer 4 includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence.

[0070] In some embodiments, as Figure 3 As shown, the coverage area 212 includes an annular area 2121 , and the width of the annular area 2121 included in the first type of light emitting device 25 is greater than the width of the annular area 2121 included in the second type of light emitting device 26 .

[0071] The annular area 2121 has an inner annular surface and an outer annular surface, and the width of the annular area 2121 refers to the distance between the inner annular surface and the outer annular surface.

[0072] The difference between the width of the annular region 2121 included in the first type light-emitting device 25 and the width of the annular region 2121 included in the second type light-emitting device 26 is greater than or equal to 1 micron. Of course, the difference between the width of the annular region 2121 included in the first type light-emitting device 25 and the width of the annular region 2121 included in the second type light-emitting device 26 may also be slightly less than 1 micron, as long as the width of the annular region 2121 included in the first type light-emitting device 25 is greater than the width of the annular region 2121 included in the second type light-emitting device 26. This is not limited in the embodiments of the present disclosure.

[0073] For example, in the related art, the width of the annular area 2121 of the first electrode layer 21 included in each light-emitting device is 2 microns. Thus, in the embodiment of the present disclosure, the width of the annular area 2121 included in the first type of light-emitting device 25 is greater than or equal to 3 microns, and the width of the annular area 2121 included in the second type of light-emitting device 26 is 2 microns.

[0074] It should be noted that increasing the width of the annular region 2121 of the first-type light-emitting device 25, that is, increasing the area of ​​light leakage blocked by the first electrode layer 21 included in the first-type light-emitting device 25, will correspondingly reduce the transmittance of the display panel. Therefore, to avoid a low transmittance of the display panel, the width of the annular region 2121 included in the first-type light-emitting device 25 is less than or equal to the maximum distance threshold. For example, when the maximum distance threshold is 5 microns, the width of the annular region 2121 included in the first-type light-emitting device 25 is less than or equal to 5 microns.

[0075] In other embodiments, Figure 4 As shown, the footprint 212 of the first-type light-emitting device 25 includes an annular region 2121 and a plurality of extended regions 2122 spaced apart and located on a side of the annular region 2121 facing away from the exposed region 211. The footprint 212 of the second-type light-emitting device 26 also includes the annular region 2121. The width of the annular region 2121 of the first-type light-emitting device 25 is greater than or equal to the width of the annular region 2121 of the second-type light-emitting device 26. Thus, the provision of the extended regions 2122 increases the light-shielding area of ​​the first electrode layer 21 of the first-type light-emitting device 25. For example, the width of the annular region 2121 of the first-type light-emitting device 25 is equal to the width of the annular region 2121 of the second-type light-emitting device 26.

[0076] The shapes of the orthographic projections of each extension area 2122 on the driver backplane 1 may be the same or different. Figure 4As shown, the orthographic projections of the multiple extension areas 2122 on the driving back plate 1 are all rectangular structures, or the orthographic projections of the multiple extension areas 2122 on the driving back plate 1 are all trapezoidal structures; of course, it is also possible that the orthographic projections of some of the multiple extension areas 2122 on the driving back plate 1 are rectangular structures, and the orthographic projections of the remaining extension areas 2122 on the driving back plate 1 are trapezoidal structures.

[0077] In the embodiment of the present disclosure, Figure 5 As shown, the first electrode layer 21 of the first type light emitting device 25 includes a first conductive film layer 214 , a second conductive film layer 215 and a third conductive film layer 216 sequentially distributed in a direction away from the driving backplane 1 .

[0078] The second conductive film layer 215 not only has a conductive function but also has a light-reflecting function to achieve a light-shielding effect.

[0079] In some embodiments, the first conductive film layer 214 and the third conductive film layer 216 can be transparent conductive film layers. For example, the first conductive film layer 214 and the third conductive film layer 216 are both ITO film layers; the second conductive film layer 215 is an opaque metal film layer. For example, the second conductive film layer 215 is a silver film layer.

[0080] Since the second conductive film layer 215 has a light-shielding effect, when increasing the width of the coverage area 212 of the first electrode layer 21 included in the first type light-emitting device 25, this can be achieved by increasing the area of ​​the second conductive film layer 215, that is, the outer contours of the orthographic projections of the first conductive film layer 214 and the third conductive film layer 216 on the driver backplane 1 are both located within the orthographic projection of the second conductive film layer 215 on the driver backplane 1. Of course, this can also be achieved by increasing the area of ​​the second conductive film layer 215 and the area of ​​one of the first conductive film layer 214 and the third conductive film layer 216, that is, the outer contour of the orthographic projection of one of the first conductive film layer 214 and the third conductive film layer 216 on the driver backplane 1 is located within the orthographic projection of the second conductive film layer 215 on the driver backplane 1, and the embodiments of the present disclosure are not limited to this.

[0081] In the embodiment of the present disclosure, the multiple light-emitting devices formed by the light-emitting layer 2 include red light-emitting devices, green light-emitting devices and blue light-emitting devices. For these three light-emitting devices, the greater the light leakage intensity during the light-emitting process, the greater the interference signal received by the fingerprint recognition sensor during the application of the display panel. In this way, each light-emitting device can be classified according to the light leakage intensity.

[0082] like Figure 6 As shown in FIG, a schematic diagram of light leakage of a display panel in the related art is illustrated. Figure 6It can be seen that the light leakage intensity of the green light-emitting device is greater than that of the red light-emitting device, and the light leakage intensity of the red light leakage unit is greater than that of the blue light-emitting device. Thus, according to the embodiment of the present disclosure, the green light-emitting device among the multiple light-emitting devices can be classified as the first type of light-emitting device 25, and the red and blue light-emitting devices among the multiple light-emitting devices can be classified as the second type of light-emitting device 26. Of course, the green and red light-emitting devices among the multiple light-emitting devices can also be classified as the first type of light-emitting device 25, and the blue light-emitting device among the multiple light-emitting devices can be classified as the second type of light-emitting device 26. The embodiment of the present disclosure does not limit this.

[0083] Taking the classification of the green light-emitting device among multiple light-emitting devices as the first type of light-emitting device 25 as an example, combined with the embodiment of the present disclosure, when the width of the coverage area 212 of the first electrode layer 21 included in the green light-emitting device (the distance between the inner ring surface and the outer ring surface of the annular area 2121) is increased by 1 micron, the corresponding leakage ratio of the green light-emitting device decreases from 25.85% to 21.95%, which is approximately reduced by 4 percentage points. In this way, when the leakage ratio decreases, the leakage intensity of the green light-emitting device also decreases successively, thereby reducing the luminous flux of the leakage light.

[0084] After increasing the width of the coverage area 212 of the first electrode layer 21 included in the green light-emitting device, the transmittance of the display panel dropped from 3.2% to 2.9%. Although the transmittance has dropped, it can still meet the usage requirements, that is, it can ensure that the fingerprint recognition sensor receives the fingerprint reflected light.

[0085] In the disclosed embodiments, multiple light-emitting devices are arranged in an array to form multiple light-emitting units, and two adjacent light-emitting units share some of the light-emitting devices. For example, a light-emitting unit includes two green light-emitting devices, one red light-emitting device, and one blue light-emitting device. The two green light-emitting devices are arranged along the rows of the array, while the red and green light-emitting devices are arranged along the columns of the array. In the row direction, the red and green light-emitting devices are each located between the two green light-emitting devices.

[0086] The present disclosure also provides a method for manufacturing a display panel, which is used to manufacture the display panel described in the above embodiment. Figure 7 As shown, the method includes the following steps S110 to S150.

[0087] Step S110 , obtaining a plurality of design layouts, wherein the plurality of design layouts at least include an active layer design layout, a gate metal layer design layout, a source / drain metal layer design layout, and a first electrode layer design layout.

[0088] Among them, the active layer design layout is as follows Figure 8 As shown, the gate metal layer design layout is as follows Figure 9 As shown, the source and drain metal layer design layout is as follows Figure 10 shown.

[0089] Step S120 , manufacturing a driving backplane according to the active layer design layout, the gate metal layer design layout, and the source / drain metal layer design layout.

[0090] Step S130 : According to the design layout of the first electrode layer, a plurality of first electrode layers distributed at intervals are manufactured on one side of the driving backplane through a mask.

[0091] Step S140 : forming a pixel definition layer, an organic light emitting layer, and a second electrode layer in sequence on a side of the first electrode layer facing away from the driving backplane.

[0092] Step S150 , forming a photoelectric sensing layer on a side of the driving backplane away from the first electrode layer.

[0093] In which, the pixel definition layer has an opening, the first electrode layer includes an exposed area exposed at the opening and a covering area surrounding the exposed area, the multiple first electrode layers include a first type of electrode layer and a second type of electrode layer, the minimum width of the covering area included in the first type of electrode layer is not less than the maximum width of the covering area included in the second type of electrode layer, and the maximum width of the covering area included in the first type of electrode layer is greater than the maximum width of the covering area included in the second type of electrode layer.

[0094] The manufacturing processes involved in each step from step S110 to step S150 may refer to related technologies, and the embodiments of the present disclosure do not limit this.

[0095] In the disclosed embodiment, the width of the coverage area of ​​the first-type electrode layer is increased compared to the coverage area of ​​the second-type electrode layer, thereby increasing the area blocked from light leakage. As a result, during the use of the display panel, the intensity of light leakage reaching the photoelectric sensing layer is reduced, which in turn reduces the interference signal received by the photoelectric sensing layer, thereby improving the accuracy of fingerprint recognition.

[0096] In the embodiment of the present disclosure, in order to ensure that the first type of electrode layer produced has sufficient shielding area for light leakage, so as to avoid a large interference signal received by the photoelectric sensing layer when the display panel is subsequently used, the light leakage ratio of each light-emitting device can be calculated in advance before executing the above-mentioned step S130 to determine whether the design layout of the first electrode layer is appropriate based on the calculation results.

[0097] In the related art, the theoretical light leakage ratio of each light-emitting device is determined based on the area corresponding to the opening in the pixel definition layer. However, through actual analysis and verification, the applicant found that the theoretical light leakage ratio of each light-emitting device determined by the calculation method provided by the related art differed significantly from the actual measured light leakage ratio of each light-emitting device after the display panel was manufactured. In particular, the measured light leakage ratio of the green light-emitting device was approximately three times the theoretical light leakage ratio. For example, the theoretical light leakage ratio, the measured light leakage ratio, and the ratio of the measured light leakage ratio to the theoretical light leakage ratio of each light-emitting device in the related art are shown in Table 1 below.

[0098] Table 1

[0099]

[0100] In this regard, the present disclosure provides a method for determining the theoretical light leakage ratio of a light emitting device. Figure 11 As shown, the determination method includes steps S210 to S250.

[0101] Step S210 , obtaining structural parameters of a mask, wherein the mask has a plurality of mask openings corresponding to the first electrode layer one by one, and the structural parameters include opening sizes of the mask openings.

[0102] Each mask opening on the mask is used to produce a corresponding first electrode layer, so each mask opening corresponds one-to-one to the first electrode layers of multiple light-emitting devices. In addition, to ensure the production of the first electrode layer, the opening size of the mask opening is larger than the size of the first electrode layer.

[0103] Step S220 , determining a target mask opening corresponding to a target electrode layer, and determining an opening area of ​​the target mask opening according to an opening size of the target mask opening, wherein the target electrode layer refers to any first electrode layer included in the first type of electrode layer.

[0104] Step S230 , determining a layout projection area on the plane where the mask is located after the active layer design layout, the gate metal layer design layout, the source / drain metal layer design layout and the first electrode layer design layout are superimposed.

[0105] Step S240: determine the projection area of ​​the target mask opening in the layout projection area, and determine the light leakage ratio of the light-emitting device corresponding to the target electrode layer according to the opening area and the projection area according to the following formula.

[0106] R=(S1-S2) / S1

[0107] Wherein, R refers to the light leakage ratio of the light-emitting device corresponding to the target electrode layer, S1 refers to the opening area, and S2 refers to the projected area.

[0108] For example, through the above steps S210 to S240, the theoretical light leakage ratio of each light emitting device, the measured light leakage ratio of each light emitting device, and the ratio of the measured light leakage ratio to the theoretical light leakage ratio are shown in Table 2 below.

[0109] Table 2

[0110]

[0111] As can be seen from Table 2 above, the theoretical light leakage ratio of each light-emitting device is not much different from the measured light leakage ratio. Therefore, the light leakage ratio of each light-emitting device in the display panel can be determined by the above method, and then the suitability of the first electrode layer design layout can be determined based on the determined light leakage ratio. This is specifically achieved by the following step S250.

[0112] Step S250: When the light leakage ratio is greater than the light leakage ratio threshold, adjust the opening size of the mask opening on the first electrode layer design layout and the mask plate, and return to the above step to determine the opening area of ​​the target mask opening according to the opening size of the target mask opening until the light leakage ratio is less than or equal to the light leakage ratio threshold, and perform the above steps according to the first electrode layer design layout and the mask plate after the last adjustment. According to the first electrode layer design layout, a plurality of spaced first electrode layers are produced on one side of the driving backplane through a mask plate.

[0113] Among them, when the light leakage ratio is less than or equal to the light leakage ratio threshold, it indicates that during the use of the display panel obtained according to the adjusted first electrode layer design layout and the mask plate, the photoelectric sensing layer receives less interference signals, thereby improving the accuracy of fingerprint recognition.

[0114] It should be noted that although the steps of the method for manufacturing a display panel in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in this specific order, or that all steps must be performed to achieve the desired results. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0115] The present disclosure also provides a display device, which includes the display panel described in the above embodiment.

[0116] In the embodiment of the present disclosure, the display device uses the display panel described in the above embodiment, which can reduce the interference signal received by the photoelectric sensing layer, thereby improving the accuracy of fingerprint recognition.

[0117] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A display panel having a display area, wherein the display area includes a fingerprint recognition area, characterized in that: The display panel includes: Driver backplane; a light-emitting layer located on one side of the driving backplane and having a light-emitting device formed thereon, the light-emitting device comprising a first electrode layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer sequentially distributed in a direction away from the driving backplane; The pixel definition layer has an opening, the first electrode layer includes an exposed area exposed at the opening and a covered area covered by the pixel definition layer, the plurality of light-emitting devices located at least in the fingerprint recognition area include a first type of light-emitting device and a second type of light-emitting device, the minimum width of the covered area of ​​the first type of light-emitting device is not less than the maximum width of the covered area of ​​the second type of light-emitting device, and the maximum width of the covered area of ​​the first type of light-emitting device is greater than the maximum width of the covered area of ​​the second type of light-emitting device; a photoelectric sensing layer, located on a side of the driving back plate away from the light-emitting layer, and at least partially located in the fingerprint recognition area; The coverage area of ​​the first type of light-emitting device includes an annular area and a plurality of extended areas located on the side of the annular area away from the exposed area and distributed at intervals. The coverage area of ​​the second type of light-emitting device includes an annular area; the width of the annular area of ​​the first type of light-emitting device is equal to the width of the annular area included in the second type of light-emitting device.

2. The display panel according to claim 1, wherein The projection of the extension area on the driving backplane is a rectangle.

3. The display panel according to any one of claims 1 to 2, wherein: The first electrode layer of the first type of light emitting device includes a first conductive film layer, a second conductive film layer and a third conductive film layer sequentially distributed in a direction away from the driving backplane; An outer contour of an orthographic projection of at least one of the first conductive film layer and the third conductive film layer on the driving backplane is located within an orthographic projection of the second conductive film layer on the driving backplane.

4. The display panel according to any one of claims 1 to 2, wherein: The plurality of light emitting devices include a green light emitting device, a red light emitting device, and a blue light emitting device; The first type of light emitting devices includes green light emitting devices, and the second type of light emitting devices includes red light emitting devices and blue light emitting devices.

5. A method for manufacturing a display panel, characterized in that: include: Acquire multiple design layouts, wherein the multiple design layouts include at least an active layer design layout, a gate metal layer design layout, a source / drain metal layer design layout, and a first electrode layer design layout; Manufacturing a driving backplane according to the active layer design layout, the gate metal layer design layout, and the source / drain metal layer design layout; According to the design layout of the first electrode layer, a plurality of first electrode layers distributed at intervals are formed on one side of the driving backplane through a mask; A pixel definition layer, an organic light emitting layer, and a second electrode layer are sequentially formed on a side of the first electrode layer away from the driving backplane; A photoelectric sensing layer is formed on a side of the driving backplane away from the first electrode layer; The pixel definition layer has an opening, the first electrode layer includes an exposed area exposed at the opening and a covered area surrounding the exposed area, the plurality of first electrode layers include a first type of electrode layer and a second type of electrode layer, the minimum width of the covered area included in the first type of electrode layer is not less than the maximum width of the covered area included in the second type of electrode layer, and the maximum width of the covered area included in the first type of electrode layer is greater than the maximum width of the covered area included in the second type of electrode layer; The coverage area of ​​the first type of electrode layer includes an annular area and multiple extended areas located on the side of the annular area away from the exposed area and distributed at intervals. The coverage area of ​​the second type of electrode layer includes an annular area; the width of the annular area of ​​the first type of electrode layer is equal to the width of the annular area included in the second type of electrode layer.

6. The method according to claim 5, wherein Before manufacturing a plurality of first electrode layers distributed at intervals on one side of the driving backplane through a mask according to the layout design of the first electrode layer, the method includes: Acquiring structural parameters of the mask, wherein the mask has a plurality of mask openings corresponding to the first electrode layer one by one, and the structural parameters include opening sizes of the mask openings; Determining a target mask opening corresponding to a target electrode layer, and determining an opening area of ​​the target mask opening according to an opening size of the target mask opening, wherein the target electrode layer refers to any first electrode layer included in the first type of electrode layer; Determine a layout projection area on the plane where the mask is located after the active layer design layout, the gate metal layer design layout, the source and drain metal layer design layout and the first electrode layer design layout are superimposed; Determine the projection area of ​​the layout projection area within the area where the target mask opening is located, and determine the light leakage ratio of the light-emitting device corresponding to the target electrode layer according to the following formula based on the opening area and the projection area; R=(S1-S2) / S1 Wherein, R refers to the light leakage ratio of the light-emitting device corresponding to the target electrode layer, S1 refers to the opening area, and S2 refers to the projected area; When the light leakage ratio is greater than the light leakage ratio threshold, adjust the first electrode layer design layout and the opening size of the mask opening on the mask plate, and return to the above step to determine the opening area of ​​the target mask opening according to the opening size of the target mask opening until the light leakage ratio is less than or equal to the light leakage ratio threshold, and perform the above steps according to the first electrode layer design layout and mask plate after the last adjustment. According to the first electrode layer design layout, a plurality of spaced first electrode layers are produced on one side of the driving backplane through a mask plate.

7. A display device, characterized in that: The display panel comprises any one of claims 1 to 4.

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