Display panel and display device

Abstract

The present application discloses a display panel and a display device, which belong to the field of display technology. The display panel includes: a substrate, a first metal layer, a first insulating layer, a second metal layer, a dimming pattern and a second insulating layer. By making the reflective portion in the second metal layer contact with at least part of the dimming pattern and the second insulating layer at the same time, and the refractive index of the dimming pattern is different from that of the second insulating layer, the optical path of part of the light directed to the via hole can be adjusted by the dimming pattern, so that the first reflected light and the second reflected light reflected by the reflective portion in the second metal layer undergo destructive interference, so as to reduce the light intensity of the light reflected by the reflective portion in the second metal layer. In this way, during the preparation process of the display panel, the probability of overexposure of the photoresist on the conductive pattern including the transparent connecting line can be reduced, thereby effectively reducing the probability of undesirable phenomena such as the transparent connecting line having a small width or broken line, thereby improving the display effect of the display panel.

Description

Technical Field

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

[0002] Currently, with the development of display technology, in order to increase the screen-to-body ratio of the display device, the camera in the display device needs to be placed below the display panel, and it needs to be ensured that the area of ​​the display panel facing the camera can still display the image.

[0003] For example, the display panel may include: a first display portion, and a second display portion located outside the first display portion, wherein the resolution of the first display portion is lower than the resolution of the second display portion. The first display portion may include: a translucent display portion and a non-translucent transitional display portion, wherein only light-emitting devices are provided in the translucent display portion, and a pixel driving circuit electrically connected to the light-emitting devices in the translucent display portion may be provided in the transitional display portion. Since the resolution of the translucent display portion is relatively low and only light-emitting devices are provided in the translucent display portion, ambient light can pass through the translucent display portion and enter the light-receiving surface of the camera. In this way, the camera can be guaranteed to operate normally while ensuring a high screen-to-body ratio of the display device.

[0004] To further improve the transmittance of the translucent display portion, transparent connecting wires are required to connect the light-emitting devices in the translucent display portion with the pixel driving circuits in the transitional display portion. However, during the manufacturing process, these transparent connecting wires are prone to defects such as small width or broken wires, resulting in poor display quality in the translucent display portion. Summary of the Invention

[0005] The embodiments of the present application provide a display panel and a display device. The technical solution is as follows:

[0006] According to one aspect of the present application, a display panel is provided, comprising:

[0007] substrate;

[0008] a first metal layer, a first insulating layer, and a second metal layer stacked on the substrate, wherein the first insulating layer has a via hole, the second metal layer is electrically connected to the first metal layer through the via hole, and the second metal layer has a reflective portion in contact with a sidewall of the via hole;

[0009] a dimming pattern located on a side of the second metal layer away from the substrate, the dimming pattern being in contact with the reflective portion;

[0010] and a second insulating layer located on a side of the dimming pattern away from the substrate, wherein at least a portion of the second insulating layer is in contact with the reflective portion, and a refractive index of the second insulating layer is different from a refractive index of the dimming pattern;

[0011] In which, the dimming pattern is used to adjust the optical path of part of the light directed toward the via hole so that the first reflected light and the second reflected light interfere destructively. The first reflected light is the light reflected by the reflecting part after passing through the dimming pattern, and the second reflected light is the light reflected by the reflecting part after passing through the second insulating layer.

[0012] Optionally, the dimming pattern has a plurality of strip-shaped dimming parts, the plurality of dimming parts are arranged in parallel, and the distance between any two adjacent dimming parts is equal.

[0013] Optionally, the width of the dimming section is equal to the distance between any two adjacent dimming sections.

[0014] Optionally, a refractive index of the second insulating layer is smaller than a refractive index of the dimming pattern.

[0015] Optionally, the thickness d of the dimming pattern satisfies the following formula:

[0016]

[0017] Among them, n1 is the refractive index of the dimming pattern, n2 is the refractive index of the second insulating layer, λ is the wavelength of the light emitted to the via hole, k is an integer greater than or equal to zero, and α is the angle between the side of the via hole close to the first insulating layer and the substrate.

[0018] Optionally, the substrate has a first display area, and the first display area includes a light-transmitting area and a non-light-transmitting area;

[0019] The display panel further includes: a first light-emitting device located in the light-transmitting area, a first pixel driving circuit located in the non-light-transmitting area, and a transparent connecting wire located on a side of the second insulating layer away from the substrate, one end of the transparent connecting wire being electrically connected to the first light-emitting device, and the other end being electrically connected to the first pixel driving circuit;

[0020] The orthographic projection of the via hole on the substrate is located in the non-light-transmitting area and at least partially overlaps with the orthographic projection of the transparent connecting line on the substrate.

[0021] Optionally, the display panel further includes: a second light-emitting device and a second pixel driving circuit located in the non-light-transmitting area, and the second pixel driving circuit is electrically connected to the second light-emitting device.

[0022] Optionally, the substrate further has a second display area located outside the first display area;

[0023] The display panel further includes: a third light emitting device and a third pixel driving circuit located in the second display area, wherein the third pixel driving circuit is electrically connected to the third light emitting device;

[0024] The arrangement density of the third light-emitting devices in the second display area is greater than the arrangement density of the first light-emitting devices in the light-transmitting area.

[0025] Optionally, the first metal layer includes: a first power signal line, the first power signal line being electrically connected to at least one of the first pixel driving circuit, the second pixel driving circuit, and the third pixel driving circuit;

[0026] The second metal layer includes an auxiliary electrode electrically connected to the first power signal line.

[0027] According to another aspect of the present application, a display device is provided, comprising:

[0028] A power supply component, and the above-mentioned display panel, wherein the power supply component is used to supply power to the display panel.

[0029] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0030] A display panel is provided, comprising: a substrate, a first metal layer, a first insulating layer, a second metal layer, a dimming pattern, and a second insulating layer. By simultaneously contacting a reflective portion in the second metal layer with the dimming pattern and at least a portion of the second insulating layer, and by having different refractive indices between the dimming pattern and the second insulating layer, the dimming pattern can be used to adjust the optical path of a portion of light directed toward a via hole, so that the first reflected light and the second reflected light reflected by the reflective portion in the second metal layer undergo destructive interference, thereby reducing the intensity of the light reflected by the reflective portion in the second metal layer. In this way, during the preparation process of the display panel, the probability of overexposure of the photoresist on the conductive pattern including the transparent connecting line can be effectively reduced, thereby effectively reducing the probability of undesirable phenomena such as a small width or broken transparent connecting line, thereby effectively improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 This is a structural diagram of a common display panel.

[0033] Figure 2 yes Figure 1 A partial enlarged view of the first display portion in the display panel is shown;

[0034] Figure 3 It is manufactured Figure 1 A schematic diagram showing a manufacturing process of a display panel;

[0035] Figure 4 yes Figure 1 A diagram showing the relationship between the positions of the transparent connecting lines and the via holes in the display panel;

[0036] Figure 5 A display panel provided in an embodiment of the present application;

[0037] Figure 6 yes Figure 5 A partial top view of a display panel is shown;

[0038] Figure 7 This is a manufacturing method provided by the embodiment of the present application Figure 5 A schematic diagram showing a manufacturing process of a display panel;

[0039] Figure 8 is a structural diagram of another display panel provided in an embodiment of the present application;

[0040] Figure 9 yes Figure 8 Schematic diagram of pixel arrangement of a display panel shown;

[0041] Figure 10 This is a schematic diagram of a driving circuit of a display panel provided in an embodiment of the present application;

[0042] Figure 11 It is a structural schematic diagram of a display device provided in an embodiment of the present application.

[0043] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0045] Please refer to Figure 1 , Figure 1The display panel 10 includes a first display portion 11 and a second display portion 12 located outside the first display portion 11. The resolution of the first display portion 11 is lower than that of the second display portion 12.

[0046] The first display portion 11 may include: a light-transmitting display portion 111 and a non-light-transmitting transition display portion 112. Figure 2 As shown, Figure 2 yes Figure 1 FIG. 1 is a partial enlarged view of the first display portion in the display panel shown in FIG. 1 . Only the first light emitting device 1111 ( Figure 2 The block E shown in the figure represents a first light emitting device), and a first pixel driving circuit 1121 (electrically connected to the first light emitting device) may be provided in the transition display portion 112. Figure 2 The block D shown in the figure represents a first pixel driving circuit. Each first light-emitting device and the corresponding first pixel driving circuit electrically connected thereto can form a first pixel unit. The first display portion 11 includes not only a plurality of first pixel units but also a plurality of second pixel units 1122 located in the transition display portion 112 ( Figure 2 The box P shown represents a second pixel unit.) Since the resolution of the light-transmitting display portion 111 is relatively low and only the light-emitting device 1111 is provided in the light-transmitting display portion 111, ambient light can pass through the light-transmitting display portion and enter the light-receiving surface of the camera.

[0047] In order to further improve the transmittance of the light-transmitting display portion 111 , a transparent connecting line 13 is required to connect the first light-emitting device 1111 in the light-transmitting display portion 111 and the first pixel driving circuit 1121 in the transition display portion 112 .

[0048] like Figure 3 As shown, Figure 3 It is manufactured Figure 1Schematic diagram of the manufacturing process of the display panel shown. During the manufacturing process of the display panel 10, it is necessary to sequentially form on a substrate 101 having multiple functional film layers (for example, a gate metal layer and a semiconductor layer): a first metal layer 102, a first insulating layer 103, a second metal layer 104 and a second insulating layer 105. Among them, the first metal layer 102 may include: a power signal line (for example, a VDD power signal line) electrically connected to the first pixel driving circuit. In order to ensure that the power signal transmitted by the power signal line in the first metal layer 102 has better uniformity, it is necessary to connect a plurality of auxiliary electrodes with smaller resistance in parallel to the power signal line. The plurality of auxiliary electrodes may belong to the second metal layer 104. In this way, the first insulating layer 103 has a via 1031, and the auxiliary electrode in the second metal layer 104 can be electrically connected to the power signal line in the first metal layer 102 through the via 1031.

[0049] like Figure 4 As shown, Figure 4 yes Figure 1 A diagram showing the relationship between the positions of transparent connecting lines and vias in a display panel is shown. The transparent connecting line 13 used to connect the first light-emitting device and the first pixel driving circuit in the display panel is typically located on the second insulating layer. The orthographic projection of at least part of the via 1031 located within the transitional display portion overlaps with the orthographic projection of the transparent connecting line 13 on the substrate.

[0050] In this way, Figure 3 As shown, since the angle β between the sidewall of the via hole 1031 in the first insulating layer 103 and the bottom surface of the first insulating layer 103 facing the substrate 101 is an acute angle, during the process of forming the transparent conductive film 131 on the second insulating layer 104 and patterning the transparent conductive film 131, the reflective portion of the second metal layer 104 on the sidewall of the via hole 1031 is very likely to reflect exposure light, resulting in the transparent connecting line formed by the transparent conductive film 131 being very likely to be narrow or broken.

[0051] For example, Figure 3 As shown, first, a layer of photoresist 14 can be coated on the transparent conductive film 131, and the photoresist 14 can be exposed through a mask 15, and the exposed photoresist pattern 14 can be developed to form a photoresist pattern, and then the transparent conductive film 131 can be etched using an etching solution, and the photoresist pattern can be peeled off to form a transparent connecting line.

[0052] However, during the exposure process of the photoresist 14, if the orthographic projection of the light-blocking portion 151 of the mask plate 15 above the via 1031 on the substrate 101 is within the orthographic projection of the via 1031 on the substrate 101, then when part of the exposure light is irradiated by the reflective portion of the second metal layer 104 on the sidewall of the via 1031, it will be reflected by the reflective portion, and the reflected exposure light may converge onto the photoresist 14 above the via 1031, resulting in overexposure of the photoresist 14 above the via 1031. In this way, the conductive pattern formed after etching the transparent conductive film 131 is significantly different from the designed pattern. For example, the area of ​​the conductive pattern formed after etching the transparent conductive film 131 is smaller than the area of ​​the designed pattern, resulting in the transparent connecting lines in the conductive pattern being easily narrowed or broken, resulting in poor display effect of the light-transmitting display portion.

[0053] The embodiments of the present application provide a display panel and a display device, which can solve the problems existing in the above-mentioned related technologies.

[0054] like Figure 5 As shown, Figure 5 The display panel 20 includes a substrate 21 , a first metal layer 22 , a first insulating layer 23 , a second metal layer 24 , a dimming pattern 25 and a second insulating layer 26 .

[0055] The first metal layer 22, the first insulating layer 23, and the second metal layer 24 are stacked in a direction perpendicular to the substrate 21. The first insulating layer 23 has a via 231, and the second metal layer 24 is electrically connected to the first metal layer 22 through the via 231. The second metal layer 24 has a reflective portion 241 that contacts the sidewall of the via 231. The reflective portion 241 can be used to reflect light irradiated to the reflective portion 241.

[0056] The dimming pattern 25 is located on a side of the second metal layer 24 away from the substrate 21 , and the dimming pattern 25 is in contact with the reflective portion 241 of the second metal layer 24 .

[0057] The second insulating layer 26 is located on a side of the dimming pattern 25 away from the substrate 21. At least a portion of the second insulating layer 26 contacts the reflective portion 241 of the second metal layer 24. Both the second insulating layer 26 and the dimming pattern 25 can be made of transparent materials. The refractive index of the second insulating layer 26 is different from that of the dimming pattern 25.

[0058] The dimming pattern 25 can be used to adjust the optical path of a portion of light directed toward the via 231 so as to cause destructive interference between the first reflected light s1 and the second reflected light s2. The first reflected light s1 is light reflected by the reflective portion 241 after passing through the dimming pattern 25, and the second reflected light s2 is light reflected by the reflective portion 241 after passing through the second insulating layer 26. In other words, the first reflected light s1 can be light emitted by a light source located on the side of the second insulating layer 26 away from the substrate 21, which passes through the second insulating layer 26 and the second dimming pattern 25 and is then reflected by the reflective portion 241. The second reflected light s2 can be light emitted by a light source located on the side of the second insulating layer 26 away from the substrate 21 and which passes through the second insulating layer 26 and is then reflected by the reflective portion 241.

[0059] In the present application, since the reflective portion 241 in the second metal layer 24 is in contact with at least a portion of the dimming pattern 25 and the second insulating layer 26, and the refractive index of the dimming pattern 25 and the second insulating layer 26 are different, the dimming pattern 25 can adjust the optical path of a portion of the light directed toward the via hole, causing the first reflected light s1 and the second reflected light s2 reflected by the reflective portion 241 in the second metal layer 24 to undergo destructive interference, thereby reducing the intensity of the light reflected by the reflective portion 241 in the second metal layer 24. In this way, in the subsequent process of forming a conductive pattern on the second insulating layer 26, the intensity of the exposure light reflected by the reflective portion 241 in the second metal layer 24 is low, thereby effectively reducing the probability of overexposure of the photoresist on the conductive pattern, so that the conductive pattern formed on the second insulating layer 26 is less different from the designed pattern. When the conductive pattern includes a transparent connecting line, the probability of the transparent connecting line having a small width or a broken line, etc., can be effectively reduced, effectively improving the display effect of the display panel.

[0060] In summary, an embodiment of the present application provides a display panel, comprising: a substrate, a first metal layer, a first insulating layer, a second metal layer, a dimming pattern, and a second insulating layer. By making the reflective portion in the second metal layer contact with the dimming pattern and at least a portion of the second insulating layer at the same time, and the dimming pattern and the second insulating layer have different refractive indices, the dimming pattern can be used to adjust the optical path of part of the light directed to the via hole, so that the first reflected light and the second reflected light reflected by the reflective portion in the second metal layer undergo destructive interference, so as to reduce the intensity of the light reflected by the reflective portion in the second metal layer. In this way, during the preparation process of the display panel, the probability of overexposure of the photoresist on the conductive pattern including the transparent connecting line can be effectively reduced, thereby effectively reducing the probability of undesirable phenomena such as the transparent connecting line having a small width or broken line, thereby effectively improving the display effect of the display panel.

[0061] Alternatively, as Figure 6 As shown, Figure 6 yes Figure 5 A partial top view of a display panel is shown. The dimming pattern 25 can have multiple strip-shaped dimming sections 251. The multiple dimming sections 251 can be arranged in parallel, and the distance H between any two adjacent dimming sections 251 is equal. In this way, at least a portion of the second insulating layer can be in contact with the reflective section of the second metal layer, that is, a portion of the light reflected by the reflective section of the second metal layer passes through the second insulating layer and the dimming section 251 and is reflected by the reflective section of the second metal layer, while the other portion passes through the second insulating layer and is reflected by the reflective section of the second metal layer.

[0062] like Figure 5 As shown, the dimension of the via hole 231 in a direction parallel to the substrate 21 may increase in a direction away from the substrate 21. The via hole 231 may have sidewalls and a bottom surface, the reflective portion 241 of the second metal layer 24 may contact the sidewalls of the via hole 231, and the plurality of strip-shaped dimming portions 251 of the dimming pattern 25 may contact the reflective portion 241 of the second metal layer 24.

[0063] like Figure 6 As shown, a plurality of strip-shaped dimming parts 251 may extend along a side of the reflective part 24 away from the substrate 21 , and may be arranged in parallel along a direction in which the reflective part 241 is away from the substrate 21 .

[0064] Optionally, the cross-section of the plurality of strip-shaped dimming parts 251 of the dimming pattern 25 may be rectangular.

[0065] It should be noted that the multiple strip-shaped dimming portions 251 of the dimming pattern 25 in the embodiment of the present application can be arranged in other ways. For example, the multiple strip-shaped dimming portions 251 of the dimming pattern 25 can also form a grid pattern extending along the side of the reflective portion away from the substrate. This is not limited by the embodiment of the present application. The cross-sectional shape of the multiple strip-shaped dimming portions 251 of the dimming pattern 25 can also be other shapes. For example, the cross-sectional shape of the multiple strip-shaped dimming portions 251 of the dimming pattern 25 is a triangle or an arc. This is not limited by the embodiment of the present application.

[0066] Optionally, the distance H between any two adjacent dimming parts 251 may be in the range of 0.1 micrometer to 10 micrometers. Further, the distance H between any two adjacent dimming parts 251 may be in the range of 0.1 micrometer to 0.3 micrometers.

[0067] Alternatively, as Figure 6As shown, the width L of the dimming section 251 is equal to the distance H between any two adjacent dimming sections 251. That is, the width L of the dimming section 251 can range from 0.1 microns to 10 microns. Further, the width L of the dimming section 251 can range from 0.1 microns to 0.3 microns. In this way, the first reflected light s1 reflected by the reflective section 241 after passing through the second insulating layer 26 and the dimming pattern 25 and the second reflected light s2 reflected by the reflective section 241 after passing through the second insulating layer 26 can be destructively interfered with each other, so as to avoid the reflective section 241 of the second metal layer 24 reflecting the light beam to the photoresist blocked by the light-blocking portion of the mask plate during the manufacturing process of the display panel, thereby avoiding the undesirable phenomenon of the transparent connecting line above the via 231 being too small or broken.

[0068] Alternatively, as Figure 5 As shown, the refractive index of the second insulating layer 26 is smaller than the refractive index of the dimming pattern 25. In this way, on the one hand, the optical path of the first reflected light s1 reflected by the reflective portion 241 after passing through the second insulating layer 26 and the dimming pattern 25 can be changed, so that the optical path of the first reflected light s1 and the optical path of the second reflected light s2 reflected by the reflective portion 241 after passing through the second insulating layer 26 are different, thereby causing the first reflected light s1 and the second reflected light s2 to interfere with each other. On the other hand, the refractive index of the second insulating layer 26 is smaller than the refractive index of the dimming pattern 25, which can avoid total reflection of the light that passes through the second insulating layer 26 and is irradiated to the surface of the dimming pattern 25. Total internal reflection is an optical phenomenon. When light enters a medium with a higher refractive index from a medium with a lower refractive index, if the incident angle is greater than a certain critical angle (the light is far away from the normal), the refracted light will disappear, and all the incident light will be reflected without entering the medium with a low refractive index.

[0069] In an optional embodiment, the refractive index of the second insulating layer 26 can be greater than the refractive index of the dimming pattern 25. At this time, the angle between the light beam irradiated to the dimming pattern 25 through the second insulating layer 26 and the normal of the light receiving surface of the dimming pattern 25 can be smaller than the critical angle to avoid total reflection of the light irradiated to the surface of the dimming pattern 25 through the second insulating layer 26.

[0070] Optionally, the thickness d of the dimming pattern 25 satisfies the following formula:

[0071]

[0072] Where n1 is the refractive index of the dimming pattern 25, n2 is the refractive index of the second insulating layer 26, λ is the wavelength of light emitted toward the via 231, k is an integer greater than or equal to zero (for example, k = 0…1…2…), and α is the angle between the sidewall of the via 231 in the first insulating layer 23 and the bottom surface of the first insulating layer 23 facing the substrate 21. This angle α can be an acute angle. The thickness d of the dimming pattern 25 can be the dimension of the dimming portion 251 of the dimming pattern 25 in a direction perpendicular to the reflective portion 241 of the second metal layer 24.

[0073] For example, Figure 7 As shown, Figure 7 This is a manufacturing method provided by the embodiment of the present application Figure 5 Schematic diagram of the manufacturing process of the display panel shown. During the manufacturing process of the display panel 20, first, a first metal layer 22, a first insulating layer 23, a second metal layer 24, and a second insulating layer 26 can be formed in sequence on a substrate 21 having multiple functional film layers (for example, a gate metal layer and a semiconductor layer). Secondly, a graphic dimming pattern 25 can be prepared on the side of the reflective portion 241 of the second metal layer 24 away from the substrate 21 using a mask exposure method. The material of the dimming pattern 25 can be silicon nitride (SiNx). Then, a second insulating layer 26 and a first transparent conductive film 27 are formed on the side of the dimming pattern 25 away from the substrate. The transparent conductive film 27 can be used to form a transparent connecting line after the patterning process. The display panel can have multiple transparent connecting lines, which can be located in the same layer or in different layers.

[0074] In the embodiment of the present application, when forming the transparent connecting line, a transparent conductive film 27 can be formed first. Then, a layer of photoresist 28 can be coated on the transparent conductive film 27. The photoresist 28 is exposed through a mask 29. The exposed photoresist pattern 28 is developed to form a photoresist pattern. Then, the transparent conductive film 27 is etched using an etching solution, and the photoresist pattern is stripped to form the transparent connecting line. The exposure light can be UV light, and the wavelength of the UV light can be 300 nanometers. At this wavelength of exposure light, the refractive index n1 of the dimming pattern 25 is 2.1, the refractive index n2 of the second insulating layer 26 is 1.85, and the angle α between the sidewall of the via 231 and the bottom surface of the first insulating layer 23 facing the substrate 21 is 45°. When the thickness d of the dimming pattern 25 satisfies the above formula, that is, when the optical path difference between the first reflected light s1 and the second reflected light s2 reaches an odd integer multiple of half the wavelength of the exposure light, destructive interference between the first reflected light s1 and the second reflected light s2 can be achieved, thereby eliminating the reflection of the exposure light by the reflective portion 241 of the second metal layer 24. For example, assuming k = 0, the calculation yields d = 212 nanometers, or approximately 0.2 microns.

[0075] In an alternative example, Figure 7 As shown, when the dimming pattern 25 is made of silicon dioxide (SiO2), the refractive index n1 of the dimming pattern 25 is 1.51, the refractive index n2 of the second insulating layer 26 is 1.85, and the angle α between the sidewall of the via 231 and the bottom surface of the first insulating layer 23 facing the substrate 21 is 45°. When the thickness d of the dimming pattern 25 satisfies the above formula, that is, when the optical path difference between the first reflected light s1 and the second reflected light s2 reaches an odd integer multiple of half the wavelength of the exposure light, destructive interference between the first reflected light s1 and the second reflected light s2 can be achieved, thereby eliminating the reflection of the exposure light by the reflective portion 241 of the second metal layer 24. For example, assuming k = 0, it can be calculated that d = 156 nanometers, approximately 0.16 microns.

[0076] Alternatively, refer to Figure 8 and Figure 9 , Figure 8 This is a schematic structural diagram of another display panel provided in an embodiment of the present application. Figure 9 yes Figure 8 The pixel arrangement diagram of the display panel is shown in FIG. The substrate 21 may have a first display area 211, which includes a light-transmitting area 2111 and a non-light-transmitting area 2112. An optical sensor may be provided at the location of the light-transmitting area 2111, for example, the optical sensor may be a camera.

[0077] The display panel 20 further includes a first light emitting device 201 (eg, Figure 9 The block E shown in FIG. 1 represents a first light emitting device), the first pixel driving circuit 202 (eg, Figure 9 The block D shown represents a first pixel driving circuit, and a transparent connecting line 203 is located on the side of the second insulating layer away from the substrate. One end of the transparent connecting line 203 is electrically connected to the first light-emitting device 201, and the other end is electrically connected to the first pixel driving circuit 202. In this way, each first light-emitting device 201 can be electrically connected to a first pixel driving circuit 202 via a transparent connecting line 203. Each first light-emitting device 201 and the first pixel driving circuit 202 connected thereto can constitute a first pixel unit.

[0078] For example, the portion of each transparent connecting line 203 located in the light-transmitting area 2111 can be made of a transparent conductive material. This can further improve the light transmittance of the light-transmitting area 2111. This allows the camera corresponding to the light-transmitting area 2111 to receive light from outside the display panel. To simplify the manufacturing process of the transparent connecting line 203, the transparent connecting line 203 can be made entirely of a transparent conductive material. The transparent conductive material can be ITO. For example, the first light-emitting device 201 can include a light-emitting device for emitting red light, a light-emitting device for emitting green light, and a light-emitting device for emitting blue light.

[0079] The orthographic projection of the via hole on the substrate 21 is located within the non-light-transmitting area 2112 and at least partially overlaps with the orthographic projection of the transparent connecting line 207 on the substrate 21. The dimming pattern on the side of the via hole away from the substrate 21 can be used to adjust the optical path of a portion of light directed toward the via hole so that the first reflected light and the second reflected light destructively interfere with each other, thereby preventing the via hole from affecting the transparent connecting line above during the display panel manufacturing process.

[0080] Optionally, the display panel 20 further includes: a second light emitting device and a second pixel driving circuit located in the non-light-transmitting area 2112, the second pixel driving circuit being electrically connected to the second light emitting device. The second light emitting device and the second pixel driving circuit located in the non-light-transmitting area 2112 can form a plurality of second pixel units 204 arranged in an array (e.g., Figure 9 The block P1 shown represents a second pixel unit. For example, the second light-emitting device may include a light-emitting device for emitting red light, a light-emitting device for emitting green light, and a light-emitting device for emitting blue light. The second pixel driving circuit may be connected to the second light-emitting device through a via or a metal connection line.

[0081] Optionally, the substrate 21 further includes a second display area 212 located outside the first display area 211. The display panel 20 further includes: a third light-emitting device and a third pixel driving circuit located in the second display area 212, the third pixel driving circuit being electrically connected to the third light-emitting device. The third light-emitting device and the third pixel driving circuit located in the second display area 212 can form a plurality of third pixel units 205 arranged in an array (e.g., Figure 9 The block P2 shown represents a second pixel unit. For example, the third light-emitting device may include a light-emitting device for emitting red light, a light-emitting device for emitting green light, and a light-emitting device for emitting blue light. The third pixel driving circuit may be connected to the third light-emitting device through a via or a metal connection line.

[0082] The arrangement density of the third light emitting devices in the second display area 212 is greater than the arrangement density of the first light emitting devices in the light-transmitting area 2111. In this way, the display effect of the second display area 212 can be better.

[0083] like Figure 10 As shown, Figure 10 Schematic diagram of a driving circuit for a display panel provided in an embodiment of the present application. The driving circuit may include a first thin-film transistor T1, a second thin-film transistor T2, a third thin-film transistor T3, a fourth thin-film transistor T4, a fifth thin-film transistor T5, a sixth thin-film transistor T6, a seventh thin-film transistor T7, and a capacitor structure Cst1.

[0084] Among them, the first thin film transistor T1 can be a first initial thin film transistor, the second thin film transistor T2 can be a compensation thin film transistor, the third thin film transistor T3 can be a driving thin film transistor, the fourth thin film transistor T4 can be a data writing transistor, the fifth thin film transistor T5 can be an operation control thin film transistor, the sixth thin film transistor T6 can be an emission control thin film transistor, and the seventh thin film transistor T7 can be a second initial thin film transistor. It should be noted that T1 to T7 may include low-temperature polysilicon thin film transistors and / or oxide thin film transistors. T1 to T7 may also be other types of thin film transistors, and the embodiments of the present application are not limited thereto.

[0085] A gate electrode of the third thin film transistor T3 is connected to the first node N1 , a source electrode of the third thin film transistor T3 is connected to the second node N2 , and a drain electrode of the third thin film transistor T3 is connected to the third node N3 .

[0086] A gate of the fourth thin film transistor T4 is connected to the gate line (Gate) 111 , a source of the fourth thin film transistor T4 is connected to the data signal line (Data) 112 , and a drain of the fourth thin film transistor T4 is connected to the second node N2 .

[0087] A gate electrode of the second thin film transistor T2 is connected to the gate line 111 , a source electrode of the second thin film transistor T2 is connected to the third node N3 , and a drain electrode of the second thin film transistor T2 is connected to the first node N1 .

[0088] A gate of the first thin film transistor T1 is connected to a reset signal line (Reset) 113 , a drain of the first thin film transistor T1 is connected to a first reference signal line (Vinit) 114 - 1 , and a source of the first thin film transistor T1 is connected to a first node N1 .

[0089] The gate of the fifth thin film transistor T5 and the gate of the sixth thin film transistor T6 are connected to the light-emitting signal line (EM) 115, the source of the fifth thin film transistor T5 is connected to the constant high potential (VDD) 116, the drain of the fifth thin film transistor T5 is connected to the second node N2, the source of the sixth thin film transistor T6 is connected to the third node N3, the drain of the sixth thin film transistor T6 is connected to the anode of the light-emitting device (OLED) 117, and the cathode of the light-emitting device 117 is connected to the low potential (VSS) 118.

[0090] A gate of the seventh thin film transistor T7 is connected to the gate line 111 , a drain of the seventh thin film transistor T7 is connected to the second reference signal line 114 - 2 , and a source of the seventh thin film transistor T7 is connected to the anode of the light emitting device 117 .

[0091] One end of the capacitor structure Cst1 may be connected to the first node N1 , and the other end of the capacitor structure Cst1 may be connected to the constant voltage high potential 116 .

[0092] It should be noted that, as described in this specification, the functions of "source" and "drain" may be interchanged when using transistors with opposite polarities or when the current direction changes during circuit operation. Therefore, in this specification, "source" and "drain" may be interchanged. This is not a limitation in the embodiments of the present application.

[0093] The compensation thin film transistor T2 can be electrically connected to the gate driving terminal, the first node N1, and the third node N3, respectively. The compensation thin film transistor T2 can be used to adjust the potentials of the first node N1 and the third node N3 in response to the gate driving signal. The gate driving terminal is used to provide the gate driving signal.

[0094] The first node N1 can be connected to the gate of the third thin-film transistor T3, the drain of the second thin-film transistor T2, the drain of the first thin-film transistor T1, and one end of the storage capacitor C1. Therefore, the potential at the first node N1 is easily affected by other structures in the driving circuit, resulting in poor stability of the potential of the first node N1.

[0095] Optionally, the first metal layer includes: a first power signal line, the first power signal line is electrically connected to at least one of the first pixel driving circuit, the second pixel driving circuit and the third pixel driving circuit. The second metal layer includes: an auxiliary electrode electrically connected to the first power signal line. Since the connecting line connected to the N1 node is more likely to form a coupling capacitance with structures such as the pixel electrode above the connecting line, the thin film transistor connected to the N1 node will be affected by the coupling capacitance. The auxiliary electrode can be located on the side of the connecting line between the first power signal line and the N1 node away from the substrate. On the one hand, it can be used to reduce the coupling capacitance between the connecting line connected to the N1 node and the pixel electrode. On the other hand, the resistance of the first power signal line can be reduced.

[0096] In summary, an embodiment of the present application provides a display panel, comprising: a substrate, a first metal layer, a first insulating layer, a second metal layer, a dimming pattern, and a second insulating layer. By making the reflective portion in the second metal layer contact with the dimming pattern and at least a portion of the second insulating layer at the same time, and the dimming pattern and the second insulating layer have different refractive indices, the dimming pattern can be used to adjust the optical path of part of the light directed to the via hole, so that the first reflected light and the second reflected light reflected by the reflective portion in the second metal layer undergo destructive interference, so as to reduce the intensity of the light reflected by the reflective portion in the second metal layer. In this way, during the preparation process of the display panel, the probability of overexposure of the photoresist on the conductive pattern including the transparent connecting line can be effectively reduced, thereby effectively reducing the probability of undesirable phenomena such as the transparent connecting line having a small width or broken line, thereby effectively improving the display effect of the display panel.

[0097] According to another aspect of the present application, a display device is provided, comprising: a power supply component and a display panel, wherein the power supply component is configured to supply power to the display panel. The display panel may be any of the display panels described above. Figure 11 Schematic diagram of a display device provided in an embodiment of the present application. Figure 11 As shown, the display device 30 may include: a power supply component 31, and Figure 3 and Figure 6 The display panel 20 is shown.

[0098] The power supply component 31 may be electrically connected to the display panel 20 , and the power supply component 30 may be used to supply power to the display panel 20 .

[0099] Optionally, the display device may be any product or component with a display function, such as an AMOLED display device, a liquid crystal display device, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, or a digital photo frame.

[0100] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0101] In this application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0102] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel includes: A substrate having a first display area, wherein the first display area includes a light-transmitting area and a non-light-transmitting area; A first metal layer, a first insulating layer, and a second metal layer are stacked on the substrate, the first insulating layer having a via hole, the second metal layer being electrically connected to the first metal layer through the via hole, and the second metal layer having a reflective portion contacting a sidewall of the via hole; the first metal layer including: a first power signal line; a dimming pattern located on a side of the second metal layer away from the substrate, the dimming pattern contacting the reflective portion; the second metal layer comprising: an auxiliary electrode electrically connected to the first power signal line; the dimming pattern comprising a plurality of strip-shaped dimming portions, the width of each dimming portion being equal to the distance between any two adjacent dimming portions, and the plurality of strip-shaped dimming portions forming a grid-like pattern extending along a side of the reflective portion away from the substrate; a second insulating layer located on a side of the dimming pattern away from the substrate, at least a portion of the second insulating layer being in contact with the reflective portion, and a refractive index of the second insulating layer being different from a refractive index of the dimming pattern; and, a transparent connecting line located on a side of the second insulating layer away from the substrate, the orthographic projection of the via hole on the substrate being located within the non-light-transmitting area and at least partially overlapping with the orthographic projection of the transparent connecting line on the substrate; In which, the dimming pattern is used to adjust the optical path of part of the light directed toward the via hole so that the first reflected light and the second reflected light interfere destructively. The first reflected light is the light reflected by the reflecting part after passing through the dimming pattern, and the second reflected light is the light reflected by the reflecting part after passing through the second insulating layer.

2. The display panel according to claim 1, wherein: The plurality of dimming parts are arranged in parallel, and the distance between any two adjacent dimming parts is equal.

3. The display panel according to claim 1, wherein: The refractive index of the second insulating layer is smaller than the refractive index of the dimming pattern.

4. The display panel according to any one of claims 1 to 3, characterized in that: The thickness d of the dimming pattern satisfies the following formula: Among them, n1 is the refractive index of the dimming pattern, n2 is the refractive index of the second insulating layer, λ is the wavelength of the light emitted to the via hole, k is an integer greater than or equal to zero, and α is the angle between the side of the via hole close to the first insulating layer and the substrate.

5. The display panel according to any one of claims 1 to 3, characterized in that: The display panel also includes: a first light-emitting device located in the light-transmitting area, a first pixel driving circuit located in the non-light-transmitting area, one end of the transparent connecting line is electrically connected to the first light-emitting device, and the other end is electrically connected to the first pixel driving circuit.

6. The display panel according to claim 5, wherein: The display panel further includes: a second light emitting device and a second pixel driving circuit located in the non-light-transmitting area, wherein the second pixel driving circuit is electrically connected to the second light emitting device.

7. The display panel according to claim 6, wherein: The substrate further has a second display area located outside the first display area; The display panel further includes: a third light emitting device and a third pixel driving circuit located in the second display area, wherein the third pixel driving circuit is electrically connected to the third light emitting device; The arrangement density of the third light-emitting devices in the second display area is greater than the arrangement density of the first light-emitting devices in the light-transmitting area.

8. The display panel according to claim 7, wherein: The first power signal line is electrically connected to at least one of the first pixel driving circuit, the second pixel driving circuit, and the third pixel driving circuit.

9. A display device, characterized in that: include: A power supply component, and a display panel according to any one of claims 1 to 8, wherein the power supply component is used to supply power to the display panel.

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