A display panel and display device

Abstract

The embodiment of the present application discloses a display panel and a display device, the display panel comprises an optical identification area; a transistor located in the optical identification area and a light emitting element electrically connected with the transistor; a light adjusting structure located in the optical identification area, and along the thickness direction of the display panel, the light adjusting structure is located between the transistor and the light emitting element. By adopting the technical scheme provided by the embodiment, part of the light emitted by the light emitting element in the optical identification area can be shielded by setting the light adjusting structure between the transistor and the light emitting element, the light incident to the transistor is reduced, the working stability of the transistor is ensured, the display unevenness in the optical identification area is avoided, and thus the display effect of the whole display panel is ensured.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] With the development of display technology, full screen almost occupies a large proportion in consumer market, and becomes a hot topic of development direction. Taking mobile phone as an example, smart phones are used more and more widely, and the functions are more and more, which has become an indispensable electronic device in people's daily life.

[0003] Although full screen products have many benefits, with the increase of screen display area, it also brings many problems for mobile phone design, for example, the display effect of the optical recognition area of the full screen is poor, SUMMARY

[0004] Embodiments of the present application provide a display panel and a display device, by setting a light adjusting structure between the transistor and the light emitting element in the optical recognition area, avoiding the display imbalance in the optical recognition area, so as to ensure the display effect of the whole display panel.

[0005] In a first aspect, the present application provides a display panel, comprising an optical recognition area;

[0006] A transistor located in the optical recognition area and a light emitting element electrically connected with the transistor;

[0007] A light adjusting structure located in the optical recognition area, and along the thickness direction of the display panel, the light adjusting structure is located between the transistor and the light emitting element.

[0008] In a second aspect, the present application provides a display device comprising the display panel of the first aspect.

[0009] The display panel provided by the embodiments of the present application includes an optical recognition area, and in the optical recognition area, there is a light adjusting structure. Specifically, the light adjusting structure located in the optical recognition area, and along the thickness direction of the display panel, the light adjusting structure is located between the transistor and the light emitting element. By setting the light adjusting structure between the transistor and the light emitting element, part of the light emitted by the light emitting element in the optical recognition area can be shielded, the light incident to the transistor is reduced, the working stability of the transistor is ensured, the display imbalance in the optical recognition area is avoided, and the display effect of the whole display panel is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0010] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings introduced here only illustrate some of the embodiments to be described by the present invention, and are not exhaustive. A person skilled in the art can derive other drawings based on these drawings without inventive effort.

[0011] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0012] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure along the AA' direction;

[0013] Figure 3 1 is a schematic diagram of a circuit structure of a driving circuit provided by an embodiment of the present invention;

[0014] Figure 4 is a schematic structural diagram of a driving circuit provided by an embodiment of the present invention;

[0015] Figure 5 is a structural diagram of another driving circuit provided by an embodiment of the present invention;

[0016] Figure 6 is a structural diagram of another driving circuit provided by an embodiment of the present invention;

[0017] Figure 7 is a structural diagram of another driving circuit provided by an embodiment of the present invention;

[0018] Figure 8 yes Figure 2 An enlarged schematic diagram of area B in the middle;

[0019] Figure 9 yes Figure 2 Another enlarged schematic diagram of area B in the middle;

[0020] Figure 10 yes Figure 2 Another enlarged schematic diagram of area B in the middle;

[0021] Figure 11 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0022] Figure 12 yes Figure 1 A schematic diagram of a cross-sectional structure along the CC' direction;

[0023] Figure 13 is a structural diagram of another driving circuit provided by an embodiment of the present invention;

[0024] Figure 14 is a circuit structure schematic diagram of another driving circuit provided by an embodiment of the present application;

[0025] Figure 15 is a structure schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0027] It should be noted that the terms "first", "second", and the like in the description, claims, and drawings of the present application are used to distinguish like objects, but not necessarily describe a particular sequential or chronological order. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a system, product or device including a series of units does not necessarily limit to those steps or units clearly listed, but can include other units not clearly listed or inherent to these products or devices.

[0028] The existing display panel includes an optical identification area, a transistor located in the optical identification area, and a light emitting element electrically connected with the transistor. By setting the light emitting element and the transistor electrically connected therewith in the optical identification area, normal display of the optical identification area is realized, so that the overall display effect of the display panel is realized. However, when the optical identification area obtains light, part of the light emitted by the light emitting element located in the optical identification area will be transmitted to the transistor. The light incident on the transistor will affect the stability of the transistor, for example, the stability of the transfer characteristic curve, etc., resulting in uneven display of the optical identification area, and further affecting the overall display effect of the display panel.

[0029] To solve the above problems, an embodiment of the present application discloses a display panel and a display device. The display panel includes an optical identification area; a transistor located in the optical identification area and a light emitting element electrically connected with the transistor; a light adjusting structure located in the optical identification area, and along the thickness direction of the display panel, the light adjusting structure is located between the transistor and the light emitting element. By setting the light adjusting structure between the transistor and the light emitting element, part of the light reflected by the light emitting element in the optical identification area can be shielded, the light incident on the transistor is reduced, the working stability of the transistor is ensured, the uneven display in the optical identification area is avoided, and the overall display effect of the display panel is ensured.

[0030] The above is the core concept of the present invention. The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Figure 1 is a structural diagram of a display panel provided by an embodiment of the present invention, Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure along the AA' direction, Figure 3 is a schematic diagram of a circuit structure of a driving circuit provided by an embodiment of the present invention, Figure 4 This is a schematic diagram of a driving circuit provided by an embodiment of the present invention, with reference to Figures 1 to 4 As shown, an embodiment of the present invention provides a display panel 10, which includes an optical recognition area 100; a transistor 200 located in the optical recognition area 100 and a light-emitting element 300 electrically connected to the transistor 200; a light adjustment structure 400 located in the optical recognition area 100, and along the thickness direction of the display panel 10, the light adjustment structure 400 is located between the transistor 200 and the light-emitting element 300.

[0032] The display panel 10 includes an optical recognition area 100, which can obtain external light and perform optical recognition based on the obtained light, such as fingerprint recognition or optical imaging, to ensure that the display module has an optical recognition function. Figure 2 As shown, the display panel 10 further includes a plurality of light-emitting elements 300, which are driven by a driving circuit (not specifically shown in the figure) to emit light, thereby achieving the display effect of the display panel 10. Furthermore, the light-emitting elements 300 and the driving circuit are also present in the optical recognition area 100, so that the display effect of the display panel 10 can also be achieved in the optical recognition area 100, achieving a full-screen display effect of the display panel.

[0033] Specifically, the driving circuit may include at least one transistor 200. The specific implementation of the driving circuit may be set by those skilled in the art according to actual conditions and is not limited here. For example, the driving circuit includes "7T1C", "2T1C", etc., where "T" represents a transistor and "C" represents a capacitor. For example, refer to Figure 3 and Figure 4 As shown, the transistor 200 includes a first light emission control transistor T1 , a data writing transistor T2 , a driving transistor T3 , a threshold compensation transistor T4 , an initialization transistor T5 , a second light emission control transistor T6 and a reset transistor T7 . Figure 3 and Figure 4In the example, a group of driving circuits are used as an example to illustrate that the first scanning signal line Scan1 controls the conduction or shutoff of the initialization transistor T5 of the driving circuit, and resets the gate potential of the driving transistor T3 when the initialization transistor T5 is turned on. The second scanning signal line Scan2 controls the conduction and shutoff of the data writing transistor T2 and the threshold compensation transistor T4 of the driving circuit, and when the data writing transistor T2 and the threshold compensation transistor T4 are turned on, the data signal on the data signal line Vdata is written to the gate of the driving transistor T3, and the threshold voltage of the driving transistor T3 is compensated. In some optional driving circuit designs, the scanning signal Scan 2 can also be multiplexed to control the conduction or shutoff of the reset transistor T7 of the driving circuit, and when the reset transistor T7 is turned on, the anode potential of the light-emitting element 300 is reset. In this case, there is no need to set a scanning signal line separately for the reset transistor T7. In other words, the first scan signal line Scan1 can be understood as a scan signal line connected to the control terminal of the initialization transistor T5 in the driver circuit, and the second scan signal line Scan2 can be understood as a scan signal line connected to the control terminal of the data write transistor T2, the control terminal of the threshold compensation transistor T4, and the control terminal of the reset transistor T7 in the driver circuit. Generally speaking, each row of the driver circuit used for the display is connected to at least a first scan signal line Scan1 and a second scan signal line Scan2. The power signal line PVDD is used to provide a power supply voltage to the driver transistor T3. The voltage on the power signal line PVDD can be a positive voltage. The voltage on the common power signal terminal PVEE can be a negative voltage. The reference signal line Vref is used to provide a reset voltage signal. The voltage on the reference signal line Vref can be a negative voltage. The reference signal lines Vref include a first reference signal line Vref1 and a second reference signal line Vref2 extending in the row direction and parallel to each other. The reference signal in the first reference signal line Vref1 is written into the initialization transistor T5 to initialize the driver transistor T3. The reference signal in the second reference signal line Vref2 is written into the reset transistor T7 to initialize the anode of the light-emitting element 300. The above embodiment is described by taking as an example that all transistors 200 in the driving circuit are P-type transistors. In other optional embodiments, all transistors 200 in the driving circuit may be N-type transistors, or some may be P-type transistors and some may be N-type transistors. Different enable levels may be provided for different types of transistors. The enable level is a level that enables the transistor to conduct. For example, for an N-type transistor, the enable level is a high level, and for a P-type transistor, the enable level is a low level.

[0034] Exemplary, reference Figure 2As shown, the figure takes the setting position of one of the transistors 200, namely the driving transistor T3, as an example, which is only used to show the relative position relationship of the various structures in the display panel 10, and not all transistors 200 in the driving circuit are shown one by one. In addition, the driving circuit includes multiple insulating layers, metal layers and metal traces of stacked design, such as a buffer layer 210, a gate insulating layer 220, an active layer 230, an intermetallic insulating layer 240, a gate layer 250, a capacitor plate layer 260, an interlayer insulating layer 270, a source and drain layer 280 and an insulating layer 290. Specifically, the specific implementation of the film layer in the display panel 10 can be set by those skilled in the art according to actual conditions, and is also not specifically limited.

[0035] Furthermore, the display panel 10 provided in the embodiment of the present invention further includes a light adjustment structure 400, which is disposed between the light-emitting element 300 and the transistor 200 in the optical recognition area 100 along the thickness direction of the display panel 10. The thickness direction of the display panel 10 can be understood as the direction from the light-emitting side of the display panel 10 to the non-light-emitting side of the display panel 10; or, the thickness direction of the display panel 10 can be understood as the thickness direction of the substrate in the display panel 10; or, the thickness direction of the display panel 10 can be understood as the vertical light-emitting direction of the incomplete display area in the display panel 10; or, the thickness direction of the display panel 10 can be understood as the vertical light-emitting direction of the largest display area in the display panel 10.

[0036] It should be noted that, in the embodiments of the present invention, the thickness direction of the display panel refers to the same direction, and the thickness direction of the display panel will not be further described later, and reference may be made to the description here.

[0037] Specifically, refer to Figure 2 and Figure 4 As shown, at the position of the optical recognition area 100, the light adjustment structure 400 is arranged between the light-emitting element 300 and the transistor 200. The driving transistor T3 is used as an example for illustration. It should be noted that the light adjustment structure 400 can also be arranged between other transistors 200 and the light-emitting element 300, which will not be described one by one again. Among them, the light adjustment structure 400 can be made of an opaque material, which can change the transmission path of the light transmitted to the light adjustment structure 400, effectively preventing the light from the light-emitting element 300 from being transmitted to the transistor 200. Based on the fact that the transistor 200 may generate light leakage due to light exposure, the provision of the light adjustment structure 400 can ensure the stability of the transistor 200, thereby affecting the display balance of the optical recognition area 100.

[0038] It should be noted that the light transmitted to the light adjustment structure 400 can be downward-propagating light directly emitted by the light-emitting element 300, for example, when the anode of the light-emitting element 300 is a transparent electrode or a semi-transparent electrode; or it can be light that is upward-propagating light emitted by the light-emitting element 300 and reflected to the light adjustment structure 400 by other reflective structures, such as touch electrodes. The embodiment of the present invention does not limit the emission form of the light transmitted to the light adjustment structure 400. By providing the light adjustment structure 400 between the film layer where the light-emitting element is located and the film layer where the transistor is located, the propagation path of the light incident thereon is adjusted by the light adjustment structure 400, thereby reducing or eliminating the light irradiating the transistor 200, avoiding light leakage in the transistor, and ensuring the stability of the transistor 200 and the display balance of the optical recognition area 100.

[0039] In summary, the display panel provided by the embodiment of the present invention can block part of the light emitted by the light-emitting element in the optical recognition area by setting a light adjustment structure between the transistor and the light-emitting element, reduce the light incident on the transistor, ensure the working stability of the transistor, and avoid uneven display in the optical recognition area, thereby ensuring the overall display effect of the display panel.

[0040] Continue to refer Figure 2 and Figure 4 As shown, along the thickness direction of the display panel 10 , the light adjustment structure 400 and the transistor 200 at least partially overlap.

[0041] For further reference, Figure 2 and 4 As shown, the light adjustment structure 400 disposed in the optical recognition area 100 at least partially overlaps with the transistor 200 and does not extend to other locations in the optical recognition area 100. Specifically, by providing the light adjustment structure 400, while ensuring the stable operation of the transistor 200, it is also necessary to prevent the light adjustment structure 400 from blocking the light required by the optical recognition area 100 (e.g., fingerprint recognition light or imaging light), thereby ensuring the light transmittance of the optical recognition area 100. This ensures the stable display function of the optical recognition area 100 while also ensuring the stable acquisition of external light by the optical recognition area 100. For example, if the optical recognition area 100 is a fingerprint recognition area, the light adjustment structure 400 is provided to ensure the display effect of the fingerprint recognition area, thereby ensuring a balanced display of the entire display panel 10. At the same time, it is necessary to prevent the light adjustment structure 400 from blocking the fingerprint recognition light when it is acquired, thereby ensuring the fingerprint recognition effect of the fingerprint recognition area. It should be noted that the optical recognition area 100 is used as an example for the fingerprint recognition area herein, and the specific function of the optical recognition area 100 is not specifically limited in this embodiment of the present invention.

[0042] Figure 5 This is a schematic diagram of another driving circuit provided by an embodiment of the present invention, referring to Figure 3 and 5 As shown, the transistor 200 includes an initialization transistor T5 and a threshold compensation transistor T4 ; along the thickness direction of the display panel 10 , the light adjustment structure 400 at least partially overlaps with the channel of the initialization transistor T5 and / or the threshold compensation transistor T4 .

[0043] Among them, reference Figure 3 and Figure 5 As shown, the second electrode of the threshold compensation transistor T4 intersects with the second electrode of the initialization transistor T5 at the first node N1, and the first node N1 is electrically connected to the control end of the driving transistor T3. Furthermore, along the thickness direction of the display panel 10, the light adjustment structure 400 provided in the embodiment of the present invention at least partially overlaps with the channel of the initialization transistor T5 and / or the threshold compensation transistor T4, which can prevent the light emitted by the light-emitting element from being incident on the channel position of the initialization transistor T5 and / or the threshold compensation transistor T4, and prevent the initialization transistor T5 and / or the threshold compensation transistor T4 from generating light leakage, thereby ensuring that the first node N1 and the driving transistor T3 are not affected, thereby ensuring the light driving effect of the driving circuit on the light-emitting element 200, thereby achieving display balance of the display panel 10. For example, refer to Figure 5 As shown in the figure, two light adjustment structures 400 are used to block the channels of the initialization transistor T5 and the threshold compensation transistor T4 respectively, ensuring the stability of the initialization transistor T5 and the threshold compensation transistor T4. At the same time, the light adjustment structure 400 can also only block the channels of the initialization transistor T5 or the threshold compensation transistor T4. The embodiment of the present invention is not specifically limited to this. It should be noted that Figure 3 and Figure 5 The initialization transistor T5 and the threshold compensation transistor T4 mentioned in the specification are dual-gate transistors. Taking a dual-gate transistor as an example, the light adjustment structure can block the channels corresponding to both gates, or only block the channel corresponding to one gate. The embodiment of the present invention does not make any specific limitations on this.

[0044] Figure 6 This is a schematic diagram of another driving circuit provided by an embodiment of the present invention, referring to Figure 3 and Figure 6 As shown, the transistor 200 includes a driving transistor T3 and a threshold compensation transistor T4, and the gate of the driving transistor T3 is electrically connected to the first electrode of the threshold compensation transistor T4 through the first node N1; along the thickness direction of the display panel 10, the light adjustment structure 400 overlaps with at least one of the first node N1 and the light-emitting element 300.

[0045] Among them, reference Figure 3 and Figure 6 As shown, the gate of the driving transistor T3, i.e., the control terminal of the driving transistor T3, is electrically connected to the first electrode of the threshold compensation transistor T4 via the first node N1. Furthermore, along the thickness direction of the display panel 10, the light adjustment structure 400 provided in the embodiment of the present invention overlaps with at least one of the first node N1 and the light-emitting element 300. Because the potential of the light-emitting element 300 is different from that of the first node N1, the light adjustment structure 400 can serve as a shielding layer between the light-emitting element 300 and the first node N1, preventing the potential of the anode of the light-emitting element 300 from interfering with the potential of the first node N1. This, in turn, prevents fluctuations in the potential of the first node N1 from affecting the stability of the driving transistor T3, thereby ensuring display stability in the optical recognition area 100 and achieving overall display balance in the display panel 10.

[0046] Figure 7 This is a schematic diagram of another driving circuit provided by an embodiment of the present invention. Figure 3 、 Figure 4 and Figure 7 As shown, the transistor 200 includes a driving transistor T3; the display panel 10 also includes a storage capacitor Cst, and the first capacitor plate of the storage capacitor Cst is electrically connected to the gate of the driving transistor T3; along the thickness direction of the display panel 10, the light adjustment structure 400 and the storage capacitor Cst at least partially overlap.

[0047] Among them, reference Figure 3 、 Figure 4 and Figure 7 As shown, the first capacitor plate of the storage capacitor Cst in the transistor 200 is electrically connected to the gate of the driving transistor T3, or the gate of the driving transistor T3 can be reused as the first capacitor plate of the storage capacitor Cst. The embodiment of the present invention does not specifically limit this. Along the thickness direction of the display panel 10, the light adjustment structure 400 provided by the embodiment of the present invention at least partially overlaps with the storage capacitor Cst, which will not affect the transmittance of the optical recognition area 100, ensuring that the optical recognition area 100 obtains external light. At the same time, based on the large area of ​​the storage capacitor Cst, setting the light adjustment structure 400 and the storage capacitor Cst to at least partially overlap can ensure that the setting freedom of the light adjustment structure 400 is greater, reducing the alignment accuracy requirements of the light adjustment structure 400 and the storage capacitor Cst, that is, the setting area and formation are more flexible, and the process cost of preparing the light adjustment structure 400 is also lower.

[0048] For example, Figure 7The display panel 10 includes multiple light adjustment structures 400. Along the thickness direction of the display panel 10, there are light adjustment structures 400 that at least partially overlap with the channels of the initialization transistor T5 and the threshold compensation transistor T4, respectively. There are light adjustment structures 400 that overlap with the first node N1. There are light adjustment structures 400 that at least partially overlap with the storage capacitor Cst. Figure 7 The overlapping of multiple light adjustment structures 400 and transistors 200 is used as an example for description, but the specific relative position relationship between the light adjustment structures 400 and the transistors 200 is not described one by one.

[0049] It should be noted that the display panel provided by the embodiments of the present invention includes multiple light-emitting elements and multiple driving circuits. The light adjustment structures between different light-emitting elements and driving circuits can have the same or different corresponding relationships with the driving circuits. In other words, the light adjustment structures corresponding to different driving circuits, that is, the light adjustment structures disposed on the side of the different driving circuits away from the substrate, can have the same or different corresponding relationships with the driving circuits, or in other words, the projected overlap relationships. For example, the light adjustment structures corresponding to different driving circuits can be configured differently based on the luminous color of the light-emitting elements driven by the driving circuits. By using the differentiated configuration of the light adjustment structures, the luminous effects of the different light-emitting elements can be adjusted to ensure the display effect of the display panel. For another example, the light adjustment structures corresponding to different driving circuits can be configured differently based on the luminous area of ​​the light-emitting elements driven by the driving circuits. By using the differentiated configuration of the light adjustment structures, the luminous effects of the different light-emitting elements can be adjusted to ensure the display effect of the display panel. Alternatively, the light adjustment structures corresponding to different driving circuits can be configured differently based on other display requirements to ensure different display requirements are met, thereby ensuring that different display needs of the display panel are met.

[0050] Figure 8 yes Figure 2 An enlarged schematic diagram of area B in the middle, refer to Figure 2 and Figure 8 As shown, the display panel 10 also includes a first insulating layer 500 and a second insulating layer 520 located in the optical recognition area 100, the light adjustment structure 400 is located on the side of the first insulating layer 500 away from the substrate 510, and the light adjustment structure 400 is in contact with the first insulating layer 500, and the second insulating layer 520 is located on the side of the light adjustment structure 400 away from the substrate 510; the refractive index of the second insulating layer 520 is greater than the refractive index of the first insulating layer 500.

[0051] Among them, reference Figure 2 As shown, the display panel 10 further includes a substrate 510, and the optical recognition area 100, the transistor 200 and the light emitting element 300 are all located on one side of the substrate 510. Figure 2 and Figure 8 As shown, the display panel 10 also includes a first insulating layer 500 and a second insulating layer 520. In the optical recognition area 100, the light adjustment structure 400 is located on the side of the first insulating layer 500 away from the substrate 510, and the light adjustment structure 400 is in contact with the first insulating layer 500, while the second insulating layer 520 is located on the side of the light adjustment structure 400 away from the substrate 510, that is, the second insulating layer 520 is used to cover the light adjustment structure 400.

[0052] Specifically, when light is transmitted to the light adjustment structure 400, the light will be reflected (for example Figure 8 The light a1) will not be transmitted to the bottom of the light adjustment structure 400. When the light is transmitted to the first insulating layer 500 and the second insulating layer 520, due to the difference between the refractive index of the first insulating layer 500 and the refractive index of the second insulating layer 520, that is, the refractive index of the second insulating layer 520 is greater than the refractive index of the first insulating layer 500, the light originally passes through the second insulating layer 520 to the first insulating layer 500, but due to total internal reflection, it will not pass through the first insulating layer 500 to affect the transistor 200, which is equivalent to the total internal reflection of the light when it is transmitted from the optically dense medium to the optically sparse medium (for example, Figure 8 The second insulating layer 520 and the first insulating layer 500 are illustratively adjusted based on the material and other factors, and the embodiment of the present invention does not specifically limit the refractive index values.

[0053] Figure 9 yes Figure 2 Another enlarged schematic diagram of area B in the middle, Figure 10 yes Figure 2 Another enlarged schematic diagram of area B, see Figure 2 、 Figures 8 to 10 As shown, the light emitting element 300 includes an anode 310 and a cathode 330 located on a side of the anode 310 away from the substrate 510; along the thickness direction of the display panel 10, the positive projection of the cathode 330 on the substrate 510 at least partially overlaps with the positive projection of the light adjustment structure 400 on the substrate 510; along the first direction X, the length of the light adjustment structure 400 meets a preset threshold, and the first direction X is perpendicular to the thickness direction of the display panel 10; and at least part of the light is reflected on the surface of the light adjustment structure 400 and the surface of the cathode 330; and / or, at least part of the light is reflected on the surface of the light adjustment structure 400 and the surface of the anode 310. Specifically, refer to Figure 2 、 Figure 9 and Figure 10As shown, the light-emitting element 300 includes an anode 310, a light-emitting layer 320, and a cathode 330. The light-emitting layer 320 may include a hole injection layer, a hole transport layer, a light-emitting layer, and an electron transport layer. The embodiment of the present invention does not limit the specific film layers of the light-emitting layer 320. In addition, the light-emitting layer 320 is further away from the substrate 510 than the anode 310.

[0054] Furthermore, the orthographic projection of the cathode 330 on the substrate 510 at least partially overlaps with the orthographic projection of the light adjustment structure 400 on the substrate 510. Figure 9 and Figure 10 As shown. The length of the light adjustment structure 400 along the first direction X satisfies a preset threshold value. That is, the length of the light adjustment structure 400 is sufficient to adjust the light, thereby ensuring that the light is not transmitted to the transistor, ensuring the stable operation of the transistor. The embodiment of the present invention does not specifically limit the preset threshold value of the length of the light adjustment structure 400.

[0055] For further reference, Figure 9 As shown, when the orthographic projection of the light adjustment structure 400 on the substrate 510 partially overlaps with the orthographic projection of the anode 310 on the substrate 510, light can be reflected multiple times between the light adjustment structure 400 and the cathode 330 and between the light adjustment structure 400 and the anode 310, thereby preventing light from being transmitted to the transistor. Figure 10 As shown, the orthographic projection of the light adjustment structure 400 on the substrate 510 only overlaps with the orthographic projection of the cathode 330 on the substrate 510 , and light can be reflected multiple times between the light adjustment structure 400 and the cathode 330 , thereby preventing light from being transmitted to the transistor.

[0056] Generally speaking, by adjusting the positional relationship between the light-adjusting structure 400 and the cathode 330 and anode 310 along the thickness direction of the display panel 10, light can be transmitted multiple times between the cathode 330 and the light-adjusting structure 400, similar to forming a microcavity. This ensures display stability in the optical recognition area 100 and achieves overall display balance in the display panel 10. Furthermore, the light that is continuously totally reflected between the light-adjusting structure 400 and the cathode 330 and / or anode 310, after seven or more reflections, is nearly attenuated and dissipated. This further ensures that the light does not affect the transistor 200 and ensures a balanced display effect on the display panel 10.

[0057] Continue to refer Figures 2 to 7 As shown, the light adjustment structure 400 is electrically connected to the preset potential signal terminal.

[0058] Specifically, the light adjustment structure 400 may be electrically connected to a preset potential signal terminal to ensure that a fixed potential is transmitted in the light adjustment structure 400 and to prevent the light adjustment structure 400 from floating and interfering with other structures.

[0059] Furthermore, in order to avoid inducing other signals and affecting the normal transmission of other signals when the light adjustment structure 400 is in a floating setting, the light adjustment structure 400 can be subjected to potential adjustment. For example, the light adjustment structure 400 is electrically connected to a preset potential end. In this way, on the one hand, a preset potential signal is transmitted on the light adjustment structure 400, and the potential will not be affected by other signals and will not interfere with other signals. On the other hand, when the light adjustment structure 400 is electrically connected to the preset potential end, the resistance loss in the signal transmission process in the preset signal end wiring can also be reduced, thereby improving the overall signal transmission effect of the display panel 10.

[0060] It should be noted that the embodiment of the present invention does not specifically limit the location of the preset potential terminal. For example, the preset potential terminal may be a positive voltage signal or a negative voltage signal.

[0061] Furthermore, the light-emitting element 300 includes a first color light-emitting element, a second color light-emitting element and a third color light-emitting element; the transistor 200 includes a first transistor connected to the first color light-emitting element, a second transistor connected to the second color light-emitting element and a third transistor connected to the third color light-emitting element; the light adjustment structure 400 includes a first light adjustment structure arranged between the first color light-emitting element and the first transistor along the thickness direction of the display panel 10, a second light adjustment structure arranged between the second color light-emitting element and the second transistor, and a third light adjustment structure arranged between the third color light-emitting element and the third transistor; wherein the relative position relationship between the first light adjustment structure and the first transistor, the relative position relationship between the second light adjustment structure and the two transistors, and the relative position relationship between the third light adjustment structure and the three transistors are the same.

[0062] To ensure a color display effect of the display panel 10, the light-emitting element 300 includes a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element, where the different colors can be red, green, and blue. Furthermore, the transistor 200 connected to the light-emitting element 300 also has a corresponding transistor 200. For example, the transistor 200 connected to the first color light-emitting element is a first transistor, the transistor 200 connected to the second color light-emitting element is a second transistor, and the transistor 200 connected to the third color light-emitting element is a third transistor.

[0063] Furthermore, a light adjustment structure 400 is provided between the light emitting element 300 and the transistor 200. The light adjustment structure 400 provided can ensure that the transistor 200 will not be exposed to light and cause light leakage, thereby ensuring the stability of the transistor 200, thereby affecting the display balance of the optical recognition area 100. Furthermore, the relative positional relationship between the second color light emitting element, the second transistor, and the second light adjustment structure is also consistent with the relative positional relationship between the first color light emitting element, the first transistor, and the first light adjustment structure. The relative positional relationship between the third color light emitting element, the third transistor, and the third light adjustment structure is also consistent with the relative positional relationship between the first color light emitting element, the first transistor, and the first light adjustment structure. In the optical recognition area 100, the positional relationship between the transistor 200, the light emitting element 300, and the light adjustment structure 400 is the same and is not affected by the light emitting elements 200 of different colors, thereby ensuring that white light can be displayed normally in the optical recognition area 100 and ensuring the overall display effect of the display panel 10.

[0064] Figure 11 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Figure 12 yes Figure 1 A schematic diagram of a cross-sectional structure along the CC' direction, Figure 13 This is a schematic diagram of another driving circuit provided by an embodiment of the present invention, referring to Figures 11 to 13 As shown, the display panel 10 also includes multiple data lines Vdata, multiple connecting lines 110 and multiple fan-out lines 120, and there is a transistor 200 electrically connected to at least one data line Vdata; the connecting line 120 is connected in series between the data line Vdata and the fan-out line 120; the data line Vdata and the connecting line 110 are located in the display area 100A, and the fan-out line 120 is located in the non-display area 100B; the light adjustment structure 400 is arranged on the same layer as at least part of the connecting line 110.

[0065] Among them, reference Figure 11 As shown, the display panel 10 includes a plurality of data lines Vdata and connecting lines 120 located in the display area 100A, and a plurality of fan-out lines 120 located in the non-display area 100B. The data lines Vdata are electrically connected to the transistor 200, specifically the data lines Vdata and the data writing transistor T2. Furthermore, each driving circuit in the display panel 10 can be connected to two data lines Vdata, and this is not specifically limited in the embodiments of the present invention. Figure 11Only some of the wirings are shown in the figure. The embodiment of the present invention does not specifically limit the number of data lines Vdata, connecting wirings 120, and fan-out wirings 120. Among them, the data lines Vdata and the fan-out wirings 120 are electrically connected through the connecting wirings 120, thereby ensuring the normal transmission of data signals. Furthermore, by providing the connecting wirings 120, the area of ​​the non-display area 100B of the display panel 10 can be reduced, that is, the proportion of the display area 100A in the display panel 10 is increased, and the connecting wirings 120 are provided in the display area 100A, effectively ensuring the narrow frame effect of the display panel 10.

[0066] For further reference, Figure 12 and Figure 13 As shown, the light adjustment structure 400 can be arranged on the same layer as at least part of the connecting wires 110, reducing the space occupied by the light adjustment structure 400, which is conducive to achieving a thinner display panel 10. Furthermore, the connecting wires 110 extending from the display area 100A to the non-display area 100B and the connecting wires 110 perpendicular to the display area 100A and pointing to the non-display area 100B can be arranged on different layers or on the same layer. The light adjustment structure 400 can be arranged on the same layer as any of them, and the embodiments of the present invention are not limited to this. It should be noted that Figure 12 Only the relative position relationship between the light adjustment structure 400 and the connecting line 110 is shown. Figure 13 As shown, the connection trace 110 extending from the display area 100A to the non-display area 100B is disposed on the same layer as the light adjustment structure 400 .

[0067] Continue to refer Figure 11 As shown, the display panel 10 also includes a virtual routing line 111, which is arranged on the same layer as the connecting routing line 110 and is insulated from each other; the connecting routing line 110 includes a first routing section 110A and a second routing section 110B whose extension directions intersect, and the first routing section 110A and the second routing section 110B are electrically connected; the virtual routing line 111 includes a first virtual section 111A and a second virtual section 111B whose extension directions intersect, and the first virtual section 111A and the second virtual section 111B are electrically connected; the first routing section 110A and the first virtual section 111A have the same extension direction, and the second routing section 110B and the second virtual section 111B have the same extension direction.

[0068] Among them, reference Figure 11 As shown, the display panel 10 further includes a dummy trace 111, which is provided on the same layer as the connection trace 110 and is insulated from each other. Figure 11 As shown, based on the relationship that the virtual trace 111 and the connecting trace 110 are on the same layer and insulated from each other, there is a gap where the virtual trace 111 and the connecting trace 110 are relatively close to each other. Figure 11 As shown in the D area, the dummy line 111 does not affect the normal signal transmission in the display panel 10. By setting the dummy line 111, the resistance difference existing in the transmission process of the connection line 110 can be balanced, ensuring the stability of the signal transmission of the display panel 10.

[0069] Furthermore, by setting up a virtual line 111, the length of the connecting line 110 can be further compensated, that is, by setting up a virtual line 111, the wiring of the connecting line 110 setting area is balanced as a whole, ensuring that the density of the line setting in different areas is balanced, thereby avoiding the different light reflectivity in different areas of the display panel 10 due to the uneven line setting, and avoiding the uneven display effect of the display panel 10.

[0070] Furthermore, the connecting routing 110 includes a first routing section 110A and a second routing section 110B, and the extension directions of the first routing section 110A and the second routing section 110B intersect and are electrically connected to each other. The signal transmitted between the fan-out routing 120 and the data line Vdata passes through the first routing section 110A and the second routing section 110B in sequence. At the same time, the virtual routing 111 includes a first virtual section 111A and a second virtual section 111B, and the extension directions of the first virtual section 111A and the second virtual section 111B intersect and are electrically connected to each other. In order to ensure the regular design of the connecting routing 110 and the virtual routing 111 and avoid affecting the display imbalance of the display panel 10, the extension directions of the first routing section 110A and the first virtual section 111A are the same, and the extension directions of the second routing section 110B and the second virtual section 111B are the same. For example, refer to Figure 11 As shown, the extension direction of the first routing division 110A and the first virtual division 111A can be the direction from the display area 100A to the non-display area 100B in the display panel 10, and the extension direction of the second routing division 110B and the second virtual division 111B can be perpendicular to the extension direction of the first routing division 110A. The embodiment of the present invention does not specifically limit the extension direction of the routing.

[0071] Furthermore, the virtual wiring 111 is electrically connected to the preset potential signal terminal.

[0072] Specifically, the virtual line 111 may be electrically connected to a preset potential signal terminal to ensure that a fixed potential signal is transmitted in the virtual line 111 , thereby preventing the floating potential of the virtual line 111 from interfering with other structures.

[0073] Furthermore, in order to avoid induction of other signals and affecting the normal transmission of other signals when the virtual wiring 111 is set to float, the potential of the virtual wiring 111 can be adjusted. For example, the virtual wiring 111 is electrically connected to the preset potential end. In this way, on the one hand, a preset potential signal is transmitted on the virtual wiring 111, and the potential will not be affected by other signals and will not interfere with other signals; on the other hand, when the virtual wiring 111 is electrically connected to the preset potential end, the resistance loss in the signal transmission process in the wiring providing the preset signal end can also be reduced, thereby improving the overall signal transmission effect of the display panel 10.

[0074] Figure 14 is a schematic diagram of the circuit structure of another driving circuit provided by an embodiment of the present invention, with reference to Figure 14 As shown, the preset potential signal terminal includes at least one of a positive power signal terminal PVDD, a negative power signal terminal PVEE, an initialization signal terminal Vref, and a reverse bias signal terminal DVH.

[0075] Specifically, the types of the preset potential signal terminals electrically connected to the light adjustment structure 400 or the virtual wiring 111 are diverse. Figure 14As shown, the preset potential signal end can include a positive power signal end PVDD or a negative power signal end PVEE; the preset potential signal end can also include an initialization signal end Vref, i.e., a first reference signal line Vref1 and a second reference signal line Vref2; and the preset potential signal end can also be a reverse bias signal end DVH. The reverse bias signal can be a fixed signal, or can correspond to different fixed signals at different stages in a driving cycle of the pixel circuit, for example, the reverse bias signal end DVH can be two different fixed signals in a data writing stage and a holding stage in a driving cycle. The embodiment of the present application does not limit the specific setting mode of the reverse bias signal. The eighth transistor T8 is turned on in the reverse bias stage of the display panel, and transmits the signal of the reverse bias signal end DVH to the source or drain of the driving transistor T1, thereby improving the influence of transistor hysteresis. Optionally, the reverse bias signal end DVH can be electrically connected to multiple pixel circuits, thereby reducing the number of wirings and saving wiring space. By setting the preset potential signal end to include at least one of the positive power signal end PVDD, the negative power signal end PVEE, the initialization signal end Vref, and the reverse bias signal end DVH, on the one hand, it is ensured that the fixed potential signal is transmitted in the virtual wiring 111, thereby avoiding the interference of the virtual wiring 111 potential floating on other structures, and on the other hand, the setting mode of the preset potential signal matches the potential signal in the display panel 10, without the need to add other preset signals, thereby ensuring that the selection mode of the preset potential signal is simple. Optionally, the multiple light adjusting structures 400 of the display panel can be electrically connected to each other through a connection line (not shown in the figure), and the connection line can include at least a portion in the same layer as the light adjusting structure 400. In this way, when the light adjusting structure 400 is electrically connected to the preset potential signal end, the resistance of the signal line electrically connected to the preset potential signal end can also be reduced, thereby improving the voltage drop problem and further improving the display effect of the display panel.

[0076] Reference Figures 4 to 7 As shown, the shape of the light adjusting structure 400 includes a polygon, and the shapes of at least two light adjusting structures 400 are different.

[0077] Specifically, reference Figures 4 to 7 As shown, the shapes of the light adjusting structures 400 that shield the channels of different transistors 200 can be different. The light adjusting structures 400 are arranged at different positions, and the areas and shapes of the shielding regions are different, so the shapes of the light adjusting structures 400 are differentially arranged, thereby ensuring the stable operation of the transistors 200, and also ensuring the high light transmittance of the optical recognition area 100, and ensuring the light recognition effect of the optical recognition area 100. Exemplarily, reference Figure 7As shown, the shapes and sizes of the light adjustment structure 400 that blocks the storage capacitor Csr, the initialization transistor T5, the threshold compensation transistor T4, and the first node N1 vary. Therefore, the shape and size of the light adjustment structure 400 can be adaptively adjusted based on the shape and size to be blocked, and this is not specifically limited in this embodiment of the present invention.

[0078] Alternatively, considering the manufacturing process of the light adjustment structure 400 , the shape of the light adjustment structure may be set to include a hexagon, such as a regular hexagon, to match the shape of the via hole in the display panel, thereby ensuring a simple manufacturing process of the light adjustment structure.

[0079] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Figure 15 is a structural diagram of a display device provided by an embodiment of the present invention, such as Figure 15 As shown, the display device 1 includes the display panel 10 described in any of the above embodiments. Therefore, the display device 1 provided by the embodiment of the present invention has the corresponding beneficial effects of the above embodiments, which will not be repeated here. For example, the display device 1 can be an electronic device such as a mobile phone, a computer, a smart wearable device (such as a smart watch), and an in-vehicle display device, which is not limited in the embodiment of the present invention.

[0080] Optionally, the display device 1 further includes an optical recognition chip 20 ; the optical recognition chip 20 is disposed corresponding to the optical recognition area 100 .

[0081] The optical recognition chip 20 may be a sensor for fingerprint recognition. By arranging the optical recognition chip 20 in correspondence with the optical recognition area 100 , the optical recognition area 100 serves as a fingerprint recognition area, thereby realizing the fingerprint recognition function of the display panel 10 .

[0082] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: including an optical recognition area; a transistor located in the optical recognition area and a light-emitting element electrically connected to the transistor; a light adjustment structure located in the optical recognition area and located between the transistor and the light emitting element along the thickness direction of the display panel; The display panel further includes a first insulating layer and a second insulating layer located in the optical recognition area, the light adjustment structure being located on a side of the first insulating layer away from the substrate and in contact with the first insulating layer, and the second insulating layer being located on a side of the light adjustment structure away from the substrate; the refractive index of the second insulating layer being greater than the refractive index of the first insulating layer; The light emitting element comprises an anode and a cathode located on a side of the anode away from the substrate; Along the thickness direction of the display panel, the orthographic projection of the cathode on the substrate and the orthographic projection of the light adjustment structure on the substrate at least partially overlap; Along a first direction, the length of the light adjustment structure meets a preset threshold, and the first direction is perpendicular to the thickness direction of the display panel; and at least part of the light is reflected from the surface of the light adjustment structure and the surface of the cathode; And / or, at least part of the light is reflected from the surface of the light adjustment structure and the surface of the anode.

2. The display panel according to claim 1, wherein: Along a thickness direction of the display panel, the light adjustment structure and the transistor at least partially overlap.

3. The display panel according to claim 2, wherein: The transistors include an initialization transistor and a threshold compensation transistor; Along the thickness direction of the display panel, the light adjustment structure at least partially overlaps with the channel of the initialization transistor and / or the channel of the threshold compensation transistor.

4. The display panel according to claim 2, wherein: The transistor includes a driving transistor and a threshold compensation transistor, wherein the gate of the driving transistor is electrically connected to the first electrode of the threshold compensation transistor via a first node; Along a thickness direction of the display panel, the light adjustment structure overlaps with at least one of the first node and the light emitting element.

5. The display panel according to claim 1, wherein: The transistor includes a driving transistor; The display panel further comprises a storage capacitor, wherein a first capacitor plate of the storage capacitor is electrically connected to the gate of the driving transistor; Along a thickness direction of the display panel, the light adjustment structure and the storage capacitor at least partially overlap.

6. The display panel according to claim 1, wherein: The light adjustment structure is electrically connected to the preset potential signal terminal.

7. The display panel according to claim 1, wherein: The light-emitting elements include a first color light-emitting element, a second color light-emitting element and a third color light-emitting element; The transistors include a first transistor connected to the first color light emitting element, a second transistor connected to the second color light emitting element, and a third transistor connected to the third color light emitting element; The light adjustment structure includes a first light adjustment structure disposed between the first color light emitting element and the first transistor along the thickness direction of the display panel, a second light adjustment structure disposed between the second color light emitting element and the second transistor, and a third light adjustment structure disposed between the third color light emitting element and the third transistor; The relative position relationship between the first light adjustment structure and the first transistor, the relative position relationship between the second light adjustment structure and the second transistor, and the relative position relationship between the third light adjustment structure and the third transistor are the same.

8. The display panel according to claim 1, wherein: The display panel further comprises a plurality of data lines, a plurality of connection lines and a plurality of fan-out lines, and the transistor is electrically connected to at least one of the data lines; The connecting line is connected in series between the data line and the fan-out line; the data line and the connecting line are located in the display area, and the fan-out line is located in the non-display area; The light adjustment structure is arranged on the same layer as at least part of the connecting wires.

9. The display panel according to claim 8, wherein: The display panel further includes a dummy wiring, wherein the dummy wiring and the connection wiring are provided on the same layer and are insulated from each other; The connecting line includes a first line section and a second line section whose extension directions intersect, and the first line section and the second line section are electrically connected; the virtual line includes a first virtual section and a second virtual section whose extension directions intersect, and the first virtual section and the second virtual section are electrically connected; The first routing section and the first virtual section extend in the same direction, and the second routing section and the second virtual section extend in the same direction.

10. The display panel according to claim 9, wherein: The virtual wiring is electrically connected to the preset potential signal terminal.

11. The display panel according to claim 6 or 10, characterized in that: The preset potential signal terminal includes at least one of a positive power signal terminal, a negative power signal terminal, an initialization signal terminal, and a reverse bias signal terminal.

12. The display panel according to claim 1, wherein The shape of the light adjustment structure includes a polygon, and there are at least two light adjustment structures with different shapes.

13. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 12.

14. The display device according to claim 13, wherein: The display device further includes an optical recognition chip; The optical recognition chip is arranged corresponding to the optical recognition area.

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