Display panel and display device

Abstract

The present invention describes a display panel and a display device. The display panel provided by the present invention includes a first light-shielding layer, the first light-shielding layer includes at least one first opening; a device layer, the device layer includes multiple light-transmitting areas, the light-transmitting areas include at least one first light-transmitting area and at least one second light-transmitting area; the first light-transmitting area overlaps with at least one first opening, and the second light-transmitting area overlaps with a non-first opening; and an auxiliary light-shielding portion, the auxiliary light-shielding portion overlaps with the second light-transmitting area. The present invention also provides a display device including the above-mentioned display panel. Through the present invention, the auxiliary light-shielding portion blocks the second light-transmitting area, which can improve the accuracy of light sensing detection.

Description

Technical Field

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

[0002] As display device technology matures, more and more electronic devices, such as mobile phones and personal digital assistants, integrate display devices with light-sensing devices. This allows users to not only view images or text information on the display device, but also to further operate the electronic device through the information displayed on the display device.

[0003] For example, with the development of technology, a variety of display devices with fingerprint recognition functions have appeared on the market, such as mobile phones, tablets, and smart wearable devices. Before operating a display device with fingerprint recognition function, users only need to touch the display device with their finger to verify their permission, which simplifies the permission verification process. Moreover, as the application scenarios of fingerprint recognition function gradually increase, the fingerprint recognition area has gradually evolved from partial area to full-screen recognition.

[0004] In existing display devices based on optical fingerprint recognition technology, the light sensor is formed based on semiconductor devices, and fingerprint detection is achieved by utilizing the characteristic that semiconductor devices will generate leakage current when exposed to light. Specifically, the light generated by the fingerprint recognition light source is reflected by the surface touched by the finger and the display device, and the reflected light is irradiated to the light sensor. The light sensor detects the light intensity caused by the fingerprint valley peak fluctuations, thereby generating a fingerprint spectrum.

[0005] However, the accuracy of fingerprint recognition in the prior art needs to be further improved. Therefore, providing a display device to improve the accuracy of fingerprint recognition on a display panel is a problem to be solved in the art. Summary of the Invention

[0006] In view of this, the present invention provides a display panel and a display device.

[0007] The display panel provided by the present invention includes:

[0008] a first light-shielding layer, wherein the first light-shielding layer comprises at least one first opening;

[0009] a device layer, the device layer comprising a plurality of light-transmitting regions, the light-transmitting regions comprising at least one first light-transmitting region and at least one second light-transmitting region; the first light-transmitting region overlaps with at least one first opening, and the second light-transmitting region overlaps with a non-first opening;

[0010] An auxiliary light-shielding portion overlaps with the second light-transmitting area.

[0011] The present invention also provides a display device comprising the display panel.

[0012] According to the embodiment of the present application, the auxiliary light-shielding portion is used to block the second light-transmitting area, thereby improving the light detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of a display panel designed by the inventor during his research;

[0014] Figure 2 This is a partial top view of a display panel designed by the inventor during his research;

[0015] Figure 3 is a top view of a display panel provided by an embodiment of the present invention;

[0016] Figure 4 yes Figure 3 A partial enlarged view of the display panel;

[0017] Figure 5 It is along Figure 1 Local cross-section along the AA direction;

[0018] Figure 6 is a schematic structural diagram of an array layer provided by an embodiment of the present invention;

[0019] Figure 7 This is a partial schematic diagram of a display panel provided by an embodiment of the present invention;

[0020] Figure 8 It is along Figure 1 Another partial cross-section view in the AA direction;

[0021] Figure 9 It is along Figure 1 Another partial cross-section view in the AA direction;

[0022] Figure 10 It is along Figure 1 Another partial cross-section view in the AA direction;

[0023] Figure 11 yes Figure 3 Another partial enlarged view of the display panel;

[0024] Figure 12 It is along Figure 1 Another partial cross-section view in the AA direction;

[0025] Figure 13 yes Figure 3 Another partial enlarged view of the display panel;

[0026] Figure 14 yes Figure 3 Another partial enlarged view of the display panel;

[0027] Figure 15 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the following description sets forth specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art may make similar generalizations without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0031] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of the present invention are described from the perspectives shown in the accompanying drawings and should not be construed as limiting the embodiments of the present invention. Furthermore, in the context, it should be understood that when an element is referred to as being formed "on" or "under" another element, it can be formed not only directly "on" or "under" the other element, but also indirectly "on" or "under" the other element through an intermediate element.

[0032] Furthermore, the example embodiments can be implemented in a variety of forms and should not be construed as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and therefore their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all explained using the accompanying drawings as examples, but can be changed as needed, and all changes are included in the scope of protection of the present invention. The drawings of the present invention are only used to illustrate relative positional relationships, and the layer thicknesses of certain parts are exaggerated for ease of understanding. The layer thicknesses in the drawings do not represent the proportional relationship of the actual layer thicknesses. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other unless there is a conflict. The drawings of the embodiments in this application use the same reference numerals as the drawings. In addition, the similarities between the embodiments are not repeated.

[0033] To improve the accuracy of light-sensing detection, the inventors conducted a reverse investigation and research into the factors that affect the accuracy of light-sensing elements. The inventors discovered that light-sensing elements are affected by interfering light. For example, in light-sensing fingerprint recognition, this interfering light is often light that does not carry fingerprint information. Further research into the source of interfering light led to new discoveries.

[0034] Please refer to the following for details. Figure 1 and Figure 2 As shown, Figure 1 This is a cross-sectional view of a display panel designed by the inventor during his research. Figure 2 This is a partial top view of a display panel designed by the inventor during the research process.

[0035] It is understandable that the photosensitive device recognizes external information such as touch or fingerprint by reading light carrying information, so there needs to be a light channel corresponding to the photosensitive device in the display panel. For display panels with integrated photosensitive recognition functions, the light emitted by the light-emitting device can be used as a light source for optical sensing, but the light emitted by the light-emitting device cannot be directly projected onto the photosensitive device, otherwise it will interfere with the detection. Therefore, a shading layer with a light channel will be provided in the display panel, which can not only shield the interfering light, but also will not affect the normal information reading of the photosensitive device. However, in this case, the photosensitive device still has the problem of being affected by the interfering light. As the inventor's research deepened, the inventor found that within the recognition range of the photosensitive device, there are differences in brightness or light leakage in different areas. Taking the photosensitive recognition range corresponding to an optical channel as an example, such as Figure 1 and Figure 2 As shown, in the area covered by the light shielding layer 02, in addition to the film layer where the light shielding layer 02 is located, other film layers have different patterns. For example, there are other opaque film layers between the light shielding layer 02 and the substrate 01, such as other metal layers M1 / M2. The projection pattern formed by these film layers on the substrate 01 is not a complete pattern on the entire surface, but a pattern with openings or hollows, such as area A in the figure.

[0036] In other words, these film layers can block a certain amount of light, but they cannot block it uniformly. This causes light leakage in these film layers, and because the light leakage is not uniform in each area, it will also cause differences in the amount of light transmitted in different areas of the display panel. Due to some reasons (which will be explained in detail below), it is often difficult for the light-shielding layer 02 to achieve absolute opacity. Therefore, although the light-shielding layer 02 exists, the amount of light transmitted in area A can be less than the amount of light transmitted in area B (that is, the area corresponding to the light channel); however, area A will still have a certain amount of light transmittance relative to the area covered by M1 / M2. Therefore, the light leakage in area A will, on the one hand, propagate to other areas to form interfering light, and on the other hand, it will cause the amount of light in area A and its surrounding areas to be different from that in other areas, which will lead to misidentification of the photosensitive device and ultimately affect the detection accuracy.

[0037] In view of this, if Figure 3 、 Figure 4 As shown, Figure 3 A top view of a display panel provided by an embodiment of the present invention, Figure 4 for Figure 3 A partial enlarged view of the display panel.

[0038] Optionally, the display panel 100 is divided into a display area AA and a non-display area NA surrounding the display area AA. It can be understood that Figure 3 The midpoint line frame illustrates the boundary between the display area AA and the non-display area NA. The display area AA is the area of the display panel used to display images and typically includes multiple pixel units arranged in an array. Each pixel unit includes a corresponding light-emitting device (e.g., a diode) and a control element (e.g., a thin-film transistor that constitutes the pixel drive circuit). The non-display area NA surrounds the display area AA and typically includes peripheral drive elements, peripheral wiring, and a fan-out area.

[0039] The display panel 100 further includes:

[0040] The first light shielding layer 600 includes at least one first opening 610 ; the first opening 610 penetrates the first light shielding layer 600 .

[0041] A device layer 500 includes a plurality of light-transmitting regions 510 , each including a first light-transmitting region 511 and a second light-transmitting region 512 ; the first light-transmitting region 511 overlaps with at least one of the first openings 610 , and the second light-transmitting region 512 overlaps with a non-first opening;

[0042] The auxiliary light-shielding portion 700 overlaps with the second light-transmitting area 512 .

[0043] Through the embodiments of the present application, an auxiliary light-shielding portion is designed to block the second light-transmitting area, thereby avoiding light leakage problems that may cause misidentification of the photosensitive element or photosensitive device, thereby improving the accuracy of light sensing detection.

[0044] Optionally, the first opening 610 is an optical channel for transmitting light information. For example, light emitted by a light source for light sensing detection illuminates the touch surface, is reflected by the touch surface (or also includes the touch body), passes through the optical channel formed by the first opening 610, and is then received by the light sensing element on the side of the first opening facing away from the touch surface.

[0045] Optionally, the device layer 500 may include multiple sub-layers, each of which may include different devices. Optionally, these devices are made of opaque materials.

[0046] Optionally, the devices in the device layer 500 may include one or more combinations of capacitors, electrodes, traces, and circuit devices.

[0047] Optionally, the device layer 500 further includes a non-light-transmitting area 520. The non-light-transmitting area 520 can be formed by the opaque devices in each sub-layer of the device layer 500. The projections of these devices in a direction perpendicular to the plane where the display panel 100 is located (or the orthographic projections on the plane where the display panel 100 is located) together constitute the non-light-transmitting area 520. The area not blocked by the device forms the light-transmitting area 510.

[0048] Optionally, the light-transmitting area 510 includes at least one first light-transmitting area 511 and at least one second light-transmitting area 512. For ease of illustration, this embodiment uses one first light-transmitting area as an example, i.e., the first light-transmitting area 511 is surrounded by at least two adjacent second light-transmitting areas 512. Of course, in other optional embodiments of the present application, the light-transmitting area may include multiple first light-transmitting areas and multiple second light-transmitting areas.

[0049] Optionally, the first light-transmitting area 511 overlaps with at least one of the first openings 610, the second light-transmitting area 512 overlaps with a non-first opening, and the auxiliary light-shielding portion 700 overlaps with the second light-transmitting area 512. It should be noted that the above-mentioned "overlap" refers to the overlap of the orthographic projections of the two structures on the plane where the display panel 100 is located, and does not necessarily mean that they are in contact or overlapped in a contacting manner.

[0050] Optionally, the first light-transmitting area 511 overlaps with at least one of the first openings 610 , that is, the first light-transmitting area 511 also provides a transmission channel for light information that needs to be read by the light sensing element.

[0051] Optionally, the second light-transmitting area 512 overlaps with the area other than the first opening, that is, the second light-transmitting area 512 overlaps with the area other than the first opening, that is, the second light-transmitting area 512 does not overlap with the first opening 610. However, the second light-transmitting area 512 must overlap with the area where the first light-shielding layer 600 is physically located. In other words, the second light-transmitting area 512 overlaps with the area of the first light-shielding layer 600 where the first opening 610 is not provided.

[0052] Optionally, the display panel 100 includes a plurality of first openings 610 , and the plurality of first openings 610 are evenly distributed in the area where light sensing recognition is required. For example, the plurality of first openings 610 may be arranged in an array.

[0053] Optionally, the display panel 100 includes a plurality of light-transmitting areas 510 arranged in an array, wherein some of the light-transmitting areas are first light-transmitting areas 511. The first light-transmitting areas 511 are evenly distributed in the array of light-transmitting areas 510 and have a certain period, so as to better match the arrangement of the first openings 610. For example, the first light-transmitting areas 511 are also adapted to the arrangement of the first openings 610 and are also arranged in an array.

[0054] Optionally, the first light-shielding layer is located on a side of the light-transmitting area facing the light-emitting surface or the touch surface.

[0055] Optionally, the display panel 100 may include a plurality of auxiliary light-shielding portions 700 , and the plurality of auxiliary light-shielding portions 700 may form a plurality of islands or block structures spaced apart from each other and arranged in a certain regular pattern.

[0056] Optionally, the auxiliary light-shielding portion 700 and the second light-transmitting area 512 may be in a one-to-one correspondence.

[0057] Optionally, the overlap between the auxiliary light shielding portion 700 and the second light-transmitting area 512 can be that the auxiliary light shielding portion 700 completely covers the second light-transmitting area 512. In other words, the orthographic projection of the second light-transmitting area 512 on the plane where the display panel 100 is located falls within the orthographic projection of the auxiliary light shielding portion 700 on the plane where the display panel 100 is located.

[0058] Optionally, the width of the second light-transmitting region 512 is greater than or equal to 5 μm. In other words, the dimension of the second light-transmitting region 512 in any direction parallel to the plane of the display panel 100 is greater than or equal to 5 μm; otherwise, the light-transmitting region does not belong to the second light-transmitting region. It should be noted that the light-transmitting region 510 of the device layer 500 may also include other light-transmitting regions in addition to the first light-transmitting region 511 and the second light-transmitting region 512; these other light-transmitting regions do not correspond to the first opening 610 and have a maximum width less than 5 μm.

[0059] In other words, at least a portion of the light-transmitting area with a width less than 5 μm does not overlap with the auxiliary light-shielding portion.

[0060] This is because the inventors have found that, on the one hand, the additional auxiliary light-shielding portion also requires a certain amount of internal space of the display panel, and the patterned auxiliary light-shielding portion also has process requirements. On the other hand, the inventors have found that only when the light leakage in the light-transmitting area reaches a certain level will it have a significant penetration effect on the first light-shielding layer and eventually be detected by the light-sensing device. The size of the light-transmitting area that can achieve this level of light leakage needs to be greater than or equal to 5um. Therefore, through this embodiment, some light-transmitting areas do not need to be overlapped with auxiliary light-shielding portions. This can improve the light-sensing detection effect while reducing the process difficulty and preventing the auxiliary light-shielding portions from occupying too much space.

[0061] In addition, from the above analysis, it can be seen that in some other optional embodiments of the present application, the size of the light-transmitting area exposed by the auxiliary light-shielding portion is less than 5 μm. The size of a certain structure mentioned above is the size of the structure in any direction parallel to the plane where the display panel 100 is located.

[0062] In some optional embodiments of the present application, the orthographic projection of the second light-transmitting area 512 on the plane where the display panel 100 is located optionally falls within the orthographic projection of the auxiliary light-shielding portion 700 on the plane where the display panel 100 is located; and the edge of the orthographic projection of the auxiliary light-shielding portion 700 on the plane where the display panel 100 is located exceeds the edge of the orthographic projection of the second light-transmitting area 512 on the plane where the display panel 100 by 1 μm to 2 μm; that is, the edge of the orthographic projection of the auxiliary light-shielding portion 700 on the plane where the display panel 100 is located to the edge of the orthographic projection of the second light-transmitting area 512 on the plane where the display panel 100 is located is between 1 μm and 2 μm. In this way, the light-shielding reliability of the auxiliary light-shielding portion can be improved; even if there is a misalignment, the second light-transmitting area can be effectively shielded.

[0063] In some optional embodiments of the present application, the first light-shielding layer 600 is a continuous insulating layer.

[0064] Optionally, the continuous structure mentioned here refers to the first light shielding layer 600 forming multiple first openings 610 in the light sensing recognition area being an integrally formed continuous structure. In other words, the multiple second light-transmitting areas correspond to the same first light shielding layer.

[0065] Optionally, the first light shielding layer 600 is continuous in the display area AA.

[0066] Through this implementation, an insulating layer is used to make a light-shielding layer. On the one hand, the insulating layer itself is an insulating material, and some film layers in the display panel can be reused (refer to the content below), which can reduce the process steps and reduce the film thickness; on the other hand, the main light-shielding layer used for light detection is expected to be as continuous and complete as possible to avoid light leakage. If the existing metal layer of the display panel is reused to save process steps to make the main light-shielding layer that plays the main light-shielding role, since the metal layer is a conductor film layer and is often originally used to make device structures such as wiring or electrodes that transmit signals, it is inevitable that it cannot continuously form an integrated structure, which will cause light leakage in the main light-shielding layer of the reused metal, and ultimately reduce the detection accuracy; on the other hand, compared with the metal layer, the insulating layer can minimize the problem of interference light caused by its own reflection affecting light detection.

[0067] In some optional embodiments of the present application, the light transmittance of the first light shielding layer 600 is 1% to 50%.

[0068] Through this embodiment, combined with the design of overlapping the auxiliary light-shielding portion and the second light-transmitting area, the light transmittance requirement of the first light-shielding layer is no longer strict, thereby reducing costs while improving the accuracy of light sensing detection.

[0069] Furthermore, in some optional embodiments of the present invention, due to the design of overlapping the auxiliary light-shielding portion and the second light-transmitting area, the thickness of the first light-shielding layer can also be reduced, eliminating the need to increase the thickness of the first light-shielding layer to improve the light-shielding effect. Therefore, the present invention also facilitates thinning of the display panel.

[0070] Preferably, the light transmittance of the first light shielding layer 600 is 5% to 10%.

[0071] The inventors have found that since the first light-shielding layer itself needs to be patterned to form the first opening, (of course, in some optional embodiments, if the first light-shielding layer reuses other film layers in the display panel, other patterns may need to be introduced on the first light-shielding layer), and patterning the first opening requires exposure and other steps, if the transmittance of the first light-shielding layer does not meet the requirements, it cannot be fully developed and exposed, which will eventually affect the formation of the first opening; however, if the first light-shielding layer is to be fully exposed and developed, a certain degree of light-shielding ability must be sacrificed, so that the impact of light leakage in the second light-transmitting area will be difficult to compensate for by the first light-shielding layer. Through the embodiments of the present application, the first light-shielding layer whose transmittance meets the patterning requirements is combined with the auxiliary light-shielding layer. It can meet the requirements of both the production of the first opening and the improvement of the accuracy of light detection.

[0072] In some optional embodiments of the present application, the auxiliary shading portion 700 includes a metal material. Since the metal is basically completely opaque, the light leakage ratio can be greatly reduced. Therefore, the metal material can better compensate for the brightness difference between the second transparent area and the non-transparent area of the device layer.

[0073] Optionally, the auxiliary light shielding portion 700 reuses other metal layers in the display panel, which can reduce process steps and reduce film thickness.

[0074] Optionally, the auxiliary light shielding portion 700 is located on a side of the first light shielding layer 600 that is away from the display surface of the display panel 100. In this way, the reflected light of the auxiliary light shielding portion can be shielded by the first light shielding layer, thereby improving the display effect.

[0075] Through the above-described embodiments, a non-metallic first light-shielding layer is combined with a metallic auxiliary light-shielding portion, drawing on the advantages of both metal and non-metallic materials. In light of the technical problems discovered by the inventors, the first light-shielding layer and the auxiliary light-shielding portion are specifically configured to be different materials, allowing them to complement each other. This not only meets the need to improve the accuracy of light-sensing detection, but also takes into account the display effect, while also considering reducing the difficulty of the process and the thickness of the film layer. Furthermore, because the first light-shielding layer and the auxiliary light-shielding portion are made of different materials, they can be arranged adjacent to each other. Even if they come into contact, this does not affect electrical performance and prevents interfering light from leaking through the gap between them, thereby further improving the light-shielding effect and the accuracy of light-sensing detection.

[0076] In some optional embodiments of the present application, the auxiliary light shielding portion 700 is made of metal and is connected to a fixed point or shields signals. This can prevent the auxiliary light shielding portion from generating coupled signals that affect signal transmission of other devices. The auxiliary light shielding portion can also form a structure that shields interfering signals, thereby assisting other devices.

[0077] Optionally, the auxiliary light-shielding portion 700 is made of the same layer and material as other metal layers in the display panel. In this way, the auxiliary light-shielding portion 700 can be spaced between some devices. Combined with the auxiliary light-shielding portion 700 being connected to a fixed point or shielding the signal, it can play a role in shielding signal crosstalk, and can also reduce process steps and reduce film thickness.

[0078] In some optional embodiments of the present application, the auxiliary light shielding portion 700 is located between the second light-transmitting area and the first light-shielding layer. This places the auxiliary light shielding portion closer to the first light-shielding layer relative to the components forming the second light-transmitting area. Even if light oscillates between components in the device layer and generates new light leakage, it can be intercepted by the auxiliary light shielding portion before reaching the first light-shielding layer, further improving the light leakage prevention effect.

[0079] It should be noted that the film layer where the second light-transmitting area is located in this embodiment can be understood as the film layer where the device or structure forming the second light-transmitting area is located.

[0080] In some optional embodiments of the present application, optionally, the first opening 610 is an imaging pinhole for pinhole imaging.

[0081] Specifically, the first opening 610 is configured according to the pinhole imaging principle to form an imaging pinhole that satisfies pinhole imaging on the photosensitive device. This is illustrated by taking the detection of a fingerprint of a finger touching a touch surface with a fingerprint detection function on a display panel as an example: multiple light-emitting devices in the display layer are reused as a fingerprint recognition light source. After the light generated by the light-emitting devices reaches the contact surface between the fingerprint and the touch surface, due to the different degrees of reflection of the fingerprint valleys and fingerprint ridges, the reflected light passes through the imaging pinhole (i.e., the first opening 610) and is incident on the photosensitive sensor layer (i.e., the film layer where the photosensitive element or photosensitive device is located). When the aperture of the first opening 610 is sufficiently small, the fingerprint image can be imaged onto the photosensitive sensor layer through the pinhole imaging principle, thereby achieving fingerprint recognition.

[0082] Optionally, the aperture of the first opening 610 is between 5 microns and 20 microns, ensuring that the light-transmitting pinhole is small enough to achieve pinhole imaging, while meeting the process accuracy requirements for manufacturing the imaging pinhole and reducing the process difficulty.

[0083] In some optional embodiments of the present application, the display panel further includes:

[0084] a substrate; an array layer located on one side of the substrate; the device layer is located on the array layer;

[0085] The device layer includes a circuit structure, and at least a portion of the circuit structure forms a non-light-transmitting area.

[0086] For details, please refer to Figures 3 to 5 As shown, Figure 5 For the Figure 1 A partial cross-sectional view along the AA direction, wherein the cross-section is perpendicular to the plane where the display panel is located.

[0087] The display panel 100 includes a substrate 110; wherein the substrate 110 (i.e., the substrate base) can be flexible and thus stretchable, foldable, bendable or rollable, so that the flexible display panel can be stretchable, foldable, bendable or rollable. The substrate 110 can be formed of any suitable insulating material with flexibility. The substrate 110 is used to block oxygen and moisture, prevent moisture or impurities from diffusing through the flexible substrate, and provide a flat surface on the upper surface of the flexible substrate. For example, it can be formed of a polymer material such as polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyarylate (PAR) or fiberglass reinforced plastic (FRP), and the substrate 110 can be transparent, translucent or opaque. Optionally, the display panel may further include a buffer layer on the substrate 110 , and the buffer layer may cover the entire upper surface of the substrate, or the substrate 110 may include multiple sub-layers to form an organic-inorganic-organic alternating structure.

[0088] An array layer 200 is located on the substrate 110; specifically, the array layer 200 is located on the side of the substrate 110 facing the display surface or touch surface of the display panel 100. The array layer 200 may include multiple thin film transistors (TFTs) 210 and pixel circuits formed by the TFTs, which are used for light-emitting components in the display layer.

[0089] The array layer 200 may further include a passivation layer. Optionally, the passivation layer may be formed of an inorganic material such as silicon oxide or silicon nitride, or may be formed of an organic material.

[0090] The array layer 200 may further include a planarization layer 230. Optionally, the planarization layer 230 is located on the passivation layer. The planarization layer 230 includes an organic material such as acrylic, polyimide (PI), or benzocyclobutene (BCB), and has a planarization function.

[0091] Optionally, the device layer 500 is located in the array layer 200;

[0092] The device layer includes a circuit structure, and at least a portion of the circuit structure forms a non-light-transmitting area.

[0093] For ease of understanding, this application is exemplified by Figure 6 The formation of the light-transmitting area and the non-light-transmitting area of the device layer is described as an example. Figure 6 The schematic diagram of the structure of the array layer provided in the embodiment of the present invention. It should be noted that the circuit structure of the array layer of the present application is not limited to Figure 6 shown.

[0094] The array layer 200 is provided with a plurality of gate lines (Gate) extending along the rows and a plurality of data lines (Data) extending along the columns. The intersection of the gate lines (Gate) and the data lines (Data) defines a plurality of pixel regions 220. Each pixel region 220 includes a circuit structure 221, i.e., a pixel circuit. The pixel circuits are arranged in a matrix.

[0095] The array layer 200 is also provided with a plurality of light-emitting control signal lines Emit extending along the row direction and insulated and overlapping with the data lines Data, and a plurality of power signal lines PVDD extending along the column direction and insulated and overlapping with the gate lines; the light-emitting control signal lines Emit and the power signal lines PVDD define the sub-pixel area 220 into a first light-transmitting area 211, a second light-transmitting area 512 and a non-light-transmitting area 520; wherein the area where the circuit structure 221 is located is located in the non-light-transmitting area 520.

[0096] It should be noted that in this embodiment, some areas that are not blocked by circuit structures but have a width of less than 5 μm are regarded as non-light-transmitting areas.

[0097] Optionally, the first opening 610 is an imaging pinhole for pinhole imaging.

[0098] Because the imaging aperture occupies a relatively small area, it minimizes the space it occupies on the display panel and allows it to more easily avoid other structures within the display panel. Furthermore, the principle of pinhole imaging shows that the path of light reflected from the touch surface of the pinhole imaging is not an orthographic projection perpendicular to the substrate plane. Therefore, the area of the touch surface corresponding to the light information read by the pinhole is larger than the area occupied by the pinhole itself.

[0099] Optional, such as Figure 7 As shown, Figure 7 A partial schematic diagram of a display panel provided for an embodiment of the present invention. The density of the imaging pinholes (i.e., the first openings 610) is less than the density of the pixels, and the period P1 of the first openings 610 is greater than the period P2 of the pixels (or the circuit structure or the light-emitting device 350). In other words, the period of the first opening 610 is greater than the period of the light-transmitting area 510, which results in some light-transmitting areas that are not the light-transmitting areas corresponding to the first openings. Not only can they not serve as imaging channels to provide assistance for pinhole imaging, but they also introduce light leakage problems. Through this embodiment, such light-transmitting areas are classified as second light-transmitting areas, and the above-mentioned problems can be improved by shielding the second light-transmitting areas with an auxiliary light-shielding portion.

[0100] Please refer to Figure 3 、 Figure 4 and Figure 8 As shown, Figure 8 For the Figure 1 Another partial cross-sectional view along the AA direction, wherein the cross-sectional view is perpendicular to the plane where the display panel is located.

[0101] In some optional embodiments of the present application, the display panel 100 optionally further includes an anode 310 located on a side of the array layer 200 facing away from the substrate 110 ;

[0102] The auxiliary light shielding portion 700 and the anode 310 are made of the same layer and material.

[0103] Specifically, the display panel 100 further includes a display layer 300 located on a side of the array layer 200 facing away from the substrate 110. The display layer 300 includes a light-emitting device.

[0104] Optionally, the display layer 300 is located on the planarization layer 230. The display layer 300 includes an anode 310, an organic light-emitting material 320, and a cathode 330 sequentially arranged in a direction away from the substrate 110. The anode 310, the organic light-emitting material 320, and the cathode 330 together form a light-emitting device.

[0105] The design of this embodiment can further improve the accuracy of light detection.

[0106] Because, on the one hand, in order to achieve the display effect, the transmittance of the film layer on the upper side of the light-emitting device (that is, the side facing the display panel to display the light surface) is generally higher. Therefore, it is not appropriate to set an auxiliary shading part in the film layer on the upper side of the light-emitting device, and it is difficult to find a suitable film layer that can be reused as an auxiliary shading part.

[0107] On the other hand, the anode is the film layer on the side of the organic light-emitting layer of the light-emitting device that is away from the light-emitting surface of the display panel. In order to improve the light output rate, a high reflectivity material is generally used. In this way, the transmittance of the anode material itself will be relatively low, making it very suitable as an auxiliary shading layer.

[0108] On the other hand, the more the auxiliary light-shielding portion can cover the film structure that may produce the second light-transmitting area, the better the effect of assisting the first light-shielding layer in improving the difference in light transmittance between the first light-transmitting area and the non-light-transmitting area; that is, the closer the auxiliary light-shielding portion is to the touch surface, the more film structures that may cause light transmittance difference problems (that is, film structures that produce the second light-transmitting area, such as the circuit structure in the array layer in the above embodiment); and the anode is the film layer closest to the light-emitting device. That is to say, in order to be closer to the touch surface without blocking the displayed light, the position of the anode in the film layer is the optimal position to achieve the above requirements.

[0109] Therefore, through the design of this embodiment, the auxiliary functional layer can be reused with a better film material, and the utility of the auxiliary functional layer can be maximized, the reliability is also stronger, and the accuracy of light sensing detection can be further improved.

[0110] Optionally, the auxiliary light shielding portion 700 is made of the same layer and material as the anode 310 but is spaced apart from the anode.

[0111] Of course, in some optional embodiments of the present application, such as Figure 9 As shown, Figure 9 For the Figure 1 Another partial cross-sectional view along the AA direction, wherein the cross-sectional view is perpendicular to the plane where the display panel is located.

[0112] Optionally, the auxiliary light shielding portion 700 is integrally formed with the anode 310, that is, the auxiliary light shielding portion 700 is obtained by extending the anode 310. By reusing the auxiliary light shielding portion with the anode, the additional extended pattern of the anode has a relatively small effect on the electrical properties of the pixel, and the risk of causing uneven display is relatively small; at the same time, the area of the pattern to be etched can be indirectly increased by connecting the auxiliary light shielding portion and the anode, thereby reducing the difficulty of production; in addition, the area of the auxiliary light shielding portion can be increased to reduce the possibility of light leakage through the gap. Therefore, the embodiment of the present application can reduce the difficulty of the process while not affecting the display and further improving the accuracy of light detection.

[0113] In some optional embodiments of this application, please refer to Figure 3 、 Figure 4 and Figure 10 As shown, Figure 10 For the Figure 1 Another partial cross-sectional view along the AA direction, wherein the cross-sectional view is perpendicular to the plane where the display panel is located.

[0114] The display panel further includes a pixel definition layer located on a side of the array layer facing away from the substrate; therefore, the first light shielding layer reuses the pixel definition layer.

[0115] Specifically, the display layer 300 further includes a pixel definition layer 340 located on a side of the anode 310 away from the array layer 200 .

[0116] Alternatively, the pixel definition layer 340 may be formed of an organic material such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin, or phenolic resin, or an inorganic material such as SiNx.

[0117] Optionally, the anode 310 located on the side of the array layer 200 facing away from the substrate 110 includes a plurality of anode patterns corresponding one to one with the pixels, and the anode 310 is electrically connected to the circuit structure 221 in the array layer 200. The pixel definition layer 340 includes a plurality of openings exposing the anode layer 310, and the pixel definition layer 340 covers the edges of the anode 310 patterns. The organic light-emitting material 320 at least partially fills the openings in the pixel definition layer 340 and contacts the anode 310.

[0118] Optionally, the anode 310, organic light-emitting material 320 and cathode 330 defined by the opening of each pixel definition layer 340 constitute a light-emitting device 350. Each light-emitting device 350 can emit light of different colors according to different organic light-emitting materials 320. Each light-emitting device 350 constitutes a pixel (or, each light-emitting device and the pixel circuit that controls the light-emitting device together constitute a pixel), and multiple pixels together display the picture.

[0119] Alternatively, the organic light-emitting material 320 may be formed within the openings of the pixel definition layer 340 using methods such as inkjet printing, nozzle printing, or evaporation. The cathode 330 may be formed on the film layer containing the organic light-emitting material 320 by evaporation. Alternatively, the cathode 330 may entirely cover the organic light-emitting material 320 and the pixel definition layer 340.

[0120] Optionally, the first light shielding layer 600 reuses the pixel definition layer 340 . The first light shielding layer 600 further includes a second opening, which is the opening of the pixel definition layer 340 .

[0121] Through this embodiment, on the one hand, as analyzed above, for the purpose of display effect, the transmittance of the film layer on the upper side of the light-emitting device (i.e., the side facing the display panel to display the light) is generally higher. Therefore, it is not advisable to set a film layer with a light-shielding function on the entire surface or a large area in the film layer on the upper side of the light-emitting device. The pixel definition layer is the film layer closest to the light-emitting device, or even on the same layer as the light-emitting device. Therefore, while not blocking the light, it can provide more material options for the auxiliary light-shielding portion to reuse the internal film layer of the display panel as much as possible. It can also be set as close to the touch surface as possible to improve the light detection effect. In addition, for the light detection of the pinhole imaging mode, it can be more suitable for the object distance and distance required by the pinhole imaging principle, reducing the thickness of the pinhole imaging model.

[0122] On the other hand, the pixel definition layer needs to have a certain thickness to form an opening in the pixel definition layer to accommodate the light-emitting device. And because the pixel definition layer, which is also used as an auxiliary light shielding portion, needs to be patterned with a first opening and a second opening, it needs to have a certain light transmittance to achieve precise etching. By combining the auxiliary light shielding portion, the pixel definition layer can achieve both sufficient light shielding capabilities and patterning requirements.

[0123] On the other hand, the pixel definition layer is the film layer closest to the light-emitting device, or even on the same layer as the light-emitting device. Therefore, it can block the reflected light from the film layer under the light-emitting device without blocking the light, thereby improving the display effect.

[0124] Continue to refer Figure 8 As shown, optionally, the first light-shielding layer reuses the pixel definition layer; and the auxiliary light-shielding portion 700 and the anode 310 are made of the same layer and material.

[0125] The anode is a film layer that constitutes the light-emitting device and whose organic light-emitting layer is away from the light-emitting surface of the display panel. In order to improve the light output rate, a high-reflectivity material is generally selected. For the embodiment in which the auxiliary shading part and the anode are on the same layer and the pixel definition layer is reused as the first shading layer, in addition to taking into account the technical effects of the above-mentioned embodiments, it can also meet the material requirements of the two to improve the effects of both; and the first shading layer can be made to block the reflected light of the auxiliary shading part; in addition, in such a design, the auxiliary shading part and the first shading layer can be arranged adjacent to each other; the use of the two can also reduce the leakage of interference light from the gap between the auxiliary shading part and the first shading layer through material complementarity.

[0126] Optionally, the display panel 100 further includes an encapsulation layer 400 located on the display layer 300 and completely covering the display layer 300 to seal the display layer 300. It will be understood that the "on" mentioned in this embodiment can be understood as being located "on the side away from the substrate". Optionally, the encapsulation layer 400 is a thin film encapsulation layer located on the cathode 330, including a first inorganic encapsulation layer, a first organic encapsulation layer and a second inorganic encapsulation layer sequentially arranged in a direction away from the substrate 110. Of course, in other optional embodiments of the present invention, the encapsulation layer may include any number of stacked organic materials and inorganic materials as needed, but may include at least one layer of organic material and at least one layer of inorganic material alternately deposited, and the bottom layer and the top layer may be composed of inorganic materials.

[0127] In addition, for any embodiment of the present application, optionally, the display panel 100 further includes a fingerprint recognition device 800, which includes the above-mentioned light-sensing element, that is, the light-sensing sensor layer.

[0128] The display panel in the present invention can be an organic light-emitting display panel, and the light-emitting element can be reused as the light source of the fingerprint recognition device (photosensitive sensor layer), ensuring that the display panel does not need to set a separate light source for the fingerprint recognition device, ensuring that the display panel structure is simple, the film layer relationship is simple, and it is easy to achieve a light and thin design of the display panel. Alternatively, the display panel provided by the embodiment of the present invention may also include a fingerprint recognition light source (not shown in the figure), which provides a light source for the photosensitive sensor layer separately through the fingerprint recognition light source, ensuring that the fingerprint recognition device can have multiple functions. For example, the fingerprint recognition light source can be an infrared light source, ensuring that the fingerprint recognition device can not only recognize fingerprints, but also recognize the blood flow status of the human body and monitor human health.

[0129] In some optional embodiments of the present application, the auxiliary light shielding portion 700 includes a first auxiliary light shielding portion 710 and a second auxiliary light shielding portion 720;

[0130] The distance between the first auxiliary light-shielding portion 710 and the adjacent first light-transmitting area 511 is smaller than the distance between the second auxiliary light-shielding portion 720 and the adjacent first light-transmitting area 511;

[0131] An area of the first auxiliary light-shielding portion is larger than an area of the second auxiliary light-shielding portion.

[0132] Optionally, the first light-transmitting areas 511 are arranged in a periodic manner, with a second light-transmitting area 512 separating the two closest first light-transmitting areas 511. Using the period of the first light-transmitting areas 511 as a limiting range, multiple cyclic units arranged in an array can be defined, with the light-transmitting areas 510 in the same cyclic unit including multiple second light-transmitting areas 212, each of which corresponds one-to-one to an auxiliary light-shielding portion 700. Therefore, the auxiliary light-shielding portion 700 corresponding to the second light-transmitting area 512 that is closer to the first light-transmitting area 511 is the first auxiliary light-shielding portion 710; the auxiliary light-shielding portion 700 corresponding to the second light-transmitting area 512 that is farther from the first light-transmitting area 511 is the second auxiliary light-shielding portion 720.

[0133] Optionally, the area of the first auxiliary light-shielding portion 710 is greater than the area of the second auxiliary light-shielding portion 720, which means that the area of the orthographic projection of the first auxiliary light-shielding portion 710 on the plane where the display panel 100 is located is greater than the area of the orthographic projection of the second auxiliary light-shielding portion 720 on the plane where the display panel 100 is located.

[0134] Through this embodiment, the area of the auxiliary shading portion corresponding to the second light-transmitting area with higher risk is increased, and the area of the auxiliary shading portion can be set more specifically, while saving space, ensuring the shading effect of the first shading portion, and maximizing the effectiveness of the auxiliary shading portion.

[0135] In some optional embodiments of this application, please continue to refer to Figure 11 The auxiliary light shielding portion 700 includes a first auxiliary light shielding portion 710 and a second auxiliary light shielding portion 720;

[0136] The distance between the first auxiliary light-shielding portion 710 and the adjacent first light-transmitting area 511 is greater than the distance between the second auxiliary light-shielding portion 720 and the adjacent first light-transmitting area 511;

[0137] The dimension of the first auxiliary light-shielding portion 710 extending beyond the corresponding second light-transmitting area 512 is smaller than the dimension of the second auxiliary light-shielding portion 720 extending beyond the corresponding second light-transmitting area 512 .

[0138] Specifically, the orthographic projection of the second light-transmitting area 512 on the plane where the display panel 100 is located falls within the orthographic projection of the auxiliary light-shielding portion 700 on the plane where the display panel 100 is located; and the edge of the orthographic projection of the auxiliary light-shielding portion 700 on the plane where the display panel 100 is located exceeds the edge of the orthographic projection of the second light-transmitting area 512 on the plane where the display panel 100 is located.

[0139] Furthermore, the distance between the edge of the orthographic projection of the first auxiliary light-shielding portion 710 on the plane where the display panel 100 is located and the edge of the orthographic projection of the second light-transmitting area 512 covered by it on the plane where the display panel 100 is located is D1; the distance between the edge of the orthographic projection of the second auxiliary light-shielding portion 720 on the plane where the display panel 100 is located and the edge of the orthographic projection of the second light-transmitting area 512 covered by it on the plane where the display panel 100 is located is D2; wherein, D1 <D2。

[0140] It should be noted that, due to pinhole imaging, the edges of the image formed by the imaging pinhole will be blurred. In other words, the image formed in areas farther from the first opening will be more blurred because the light has to travel a longer distance to reach the first opening, resulting in greater light loss. Through this embodiment, by setting different shielding levels for the second light-transmitting areas in different regions, increasing the shielding level for the second light-transmitting areas farther from the first opening, the brightness of the edge areas of the circulation unit can be darker, with less interfering light, and the image of the edge areas read by the light sensor can be clearer.

[0141] In some optional embodiments of the present application, such as Figure 12 As shown, Figure 12 For the Figure 1 Another partial cross-sectional view along the AA direction, wherein the cross-sectional view is perpendicular to the plane where the display panel is located.

[0142] The auxiliary light shielding portion 700 includes a first auxiliary light shielding portion 710 and a second auxiliary light shielding portion 720;

[0143] The first auxiliary light-shielding portion 710 and the second auxiliary light-shielding portion 720 are located in different layers.

[0144] Optionally, the first auxiliary light shielding portion 710 and the second auxiliary light shielding portion 720 reuse different metal layers in the display panel.

[0145] Through this embodiment, it is possible to prevent the first auxiliary light shielding portion 710 and the second auxiliary light shielding portion 720 from occupying too much area on the same metal layer and affecting the arrangement of other devices.

[0146] In some optional embodiments of the present application, such as Figure 13 As shown, Figure 13 for Figure 3Another partial enlarged view of the display panel. The similarities between this embodiment and the above embodiment are not repeated here.

[0147] Optionally, the auxiliary light shielding portion 700 is multiplexed as a signal line.

[0148] Optionally, a plurality of auxiliary light-shielding portions corresponding to different second light-transmitting areas are connected to each other, so that the auxiliary light-shielding portions can form wiring.

[0149] Optionally, the auxiliary light-shielding portion and the anode are in the same layer. Since the anode has an island-shaped structure, a path can be provided for connecting the auxiliary light-shielding portions to each other.

[0150] Optionally, the auxiliary light shielding portion reuses a reset line, ie, a Vref line.

[0151] Through this embodiment, the space used by the auxiliary light shielding portion can be reduced, and conversely, the auxiliary light shielding portion can also reduce the resistance of the wiring.

[0152] Optionally, the width of the trace reused as the auxiliary light-shielding portion is greater at a position away from the first opening than at a position close to the first opening. The trace close to the first opening is equivalent to the first auxiliary light-shielding portion, and its extension beyond the corresponding second light-transmitting area is smaller; the trace away from the first opening is equivalent to the second auxiliary light-shielding portion, and its extension beyond the corresponding second light-transmitting area is larger.

[0153] In some optional embodiments of the present application, such as Figure 14 As shown, Figure 14 for Figure 3 Another partial enlarged view of the display panel. The similarities between this embodiment and the above embodiment are not repeated here.

[0154] The display panel 100 further includes light emitting devices 350 arranged in an array.

[0155] The light emitting devices 350 are arranged in the same period in the first direction a and the second direction b; that is, the openings of the pixel definition layer are also arranged in the array in the above manner.

[0156] The first direction a intersects with the second direction b, and both the first direction a and the second direction b are parallel to the direction of the plane where the display panel is located.

[0157] Optionally, the first direction a is perpendicular to the second direction b.

[0158] Through this embodiment, the pixel arrangement is similar to a windmill arrangement, and the periodicity in the first direction and the second direction are consistent, so that the array placement of the first openings (ie, imaging holes) is more flexible.

[0159] Optionally, the period of the first opening is an integer multiple of the pixel period. Since the pixels are arranged in the same period in the first direction and the second direction, the first openings can be arranged in the same manner in the first direction and the second direction, making the light sensing detection more uniform.

[0160] The present invention also provides a display device, including the display panel provided by the present invention. Figure 15 As shown, Figure 15 FIG1 is a schematic diagram of a display device according to an embodiment of the present invention. The display device 1000 includes a display panel 100 according to any one of the above embodiments of the present invention. Figure 15 The embodiment only uses a mobile phone as an example to illustrate the display device 1000. It is understood that the display device provided in the embodiment of the present invention can be a computer, a television, an in-vehicle display device, or other display device with a display function, and the present invention does not specifically limit this. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention. For details, please refer to the detailed description of the display panel in the above embodiments, and this embodiment will not be repeated here.

[0161] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: a first light-shielding layer, wherein the first light-shielding layer comprises at least one first opening; a device layer, the device layer comprising a plurality of light-transmitting regions, the light-transmitting regions comprising a first light-transmitting region and a second light-transmitting region; the first light-transmitting region overlaps with at least one of the first openings, and the second light-transmitting region overlaps with a non-first opening; An auxiliary light-shielding portion, the auxiliary light-shielding portion overlaps with the second light-transmitting area, and the auxiliary light-shielding portion includes a first auxiliary light-shielding portion and a second auxiliary light-shielding portion; the distance from the first auxiliary light-shielding portion to its adjacent first light-transmitting area is smaller than the distance from the second auxiliary light-shielding portion to the adjacent first light-transmitting area; the area of the first auxiliary light-shielding portion is larger than the area of the second auxiliary light-shielding portion.

2. The display panel according to claim 1, wherein The width of the second light-transmitting area is greater than 5 μm.

3. The display panel according to claim 1, wherein The first light-shielding layer is a continuous insulating layer.

4. The display panel according to claim 1, wherein: The light transmittance of the first light-shielding layer is 1% to 50%.

5. The display panel according to claim 1, wherein The auxiliary light shielding portion includes a metal material.

6. The display panel according to claim 1, wherein: The auxiliary light-shielding portion is located between the second light-transmitting area and the first light-shielding layer.

7. The display panel according to claim 1, wherein: The display panel further includes: substrate; an array layer located on one side of the substrate; The device layer is located in the array layer; The device layer includes a circuit structure, and at least a portion of the circuit structure forms a non-light-transmitting area.

8. The display panel according to claim 1, wherein: The display panel further includes: substrate; an array layer located on one side of the substrate; a pixel definition layer located on a side of the array layer facing away from the substrate; Therefore, the first light shielding layer reuses the pixel definition layer.

9. The display panel according to any one of claims 1, 5 or 6, wherein: The display panel further includes: substrate; an array layer located on one side of the substrate; an anode located on a side of the array layer facing away from the substrate; The auxiliary light shielding portion and the anode are made of the same layer and material.

10. The display panel according to claim 1, wherein The auxiliary light shielding portion is multiplexed as a signal line.

11. The display panel according to claim 1, wherein: The auxiliary shading portion is connected to a fixed point or shielding signal.

12. The display panel according to claim 1, wherein The dimension of the first auxiliary light-shielding portion extending beyond the corresponding second light-transmitting area is smaller than the dimension of the second auxiliary light-shielding portion extending beyond the corresponding second light-transmitting area.

13. The display panel according to claim 1, wherein The first auxiliary light-shielding portion and the second auxiliary light-shielding portion are located in different layers.

14. The display panel according to claim 1, wherein: The display panel further includes light emitting devices arranged in an array; The light emitting devices are arranged at the same period in the first direction and the second direction; The first direction intersects the second direction.

15. The display panel according to claim 1, wherein The first opening is an imaging pinhole for pinhole imaging.

16. A display device, characterized in that: include: The display panel according to any one of claims 1 to 15.

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