Display panel and display device

Abstract

The display panel and the display device provided by the embodiments of the present disclosure can reduce the light flux reflected by the touch signal line. The display panel comprises a substrate, a fingerprint identification device arranged on the substrate, a light-emitting functional layer arranged on a side of the fingerprint identification device away from the substrate, and a touch layer arranged on a side of the light-emitting functional layer away from the substrate. The light-emitting functional layer comprises a plurality of light-emitting devices, at least one of which is used to emit signal light. A first shielding layer is arranged between the plurality of light-emitting devices. The first shielding layer is provided with a first via hole for exposing the fingerprint identification device. The touch layer comprises a touch signal line. The orthographic projection of the touch signal line on the substrate does not coincide with the orthographic projection of a wiring avoidance area on the substrate. The orthographic projection of the wiring avoidance area on the substrate is located between the orthographic projection of the light-emitting device and the orthographic projection of the first via hole on the substrate.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of display technology, and particularly to a display panel and display device. Background Technology

[0002] Fingerprint recognition is an important user authentication method. With the development of fingerprint recognition technology, in-display fingerprint recognition solutions based on optical fingerprint recognition technology have emerged. This solution integrates the pixel circuitry and the photosensitive element used for fingerprint acquisition onto the same substrate, effectively reducing the thickness of the display screen with fingerprint recognition functionality and lowering manufacturing costs. This makes full-screen fingerprint recognition and foldable screen fingerprint recognition possible, featuring a short optical path and higher transmittance compared to under-display fingerprint recognition. However, improving fingerprint recognition accuracy remains a persistent challenge. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] The technical problem to be solved by the embodiments of this disclosure is to provide a display panel and display device that indirectly increases the valley-ridge ratio and improves fingerprint recognition by reducing the light flux reflected by TPM.

[0005] On one hand, embodiments of this disclosure provide a display panel, including:

[0006] A substrate, a fingerprint recognition device disposed on the substrate, a light-emitting functional layer disposed on the side of the fingerprint recognition device away from the substrate, and a touch layer disposed on the side of the light-emitting functional layer away from the substrate, wherein:

[0007] The light-emitting functional layer includes multiple light-emitting devices, at least one of which is used to emit signal light. A first shielding layer is disposed between the multiple light-emitting devices, and the first shielding layer has a first through hole for exposing the fingerprint recognition device.

[0008] The touch layer includes touch signal lines. The orthographic projection of the touch signal lines on the substrate does not coincide with the orthographic projection of the trace avoidance area on the substrate. The orthographic projection of the trace avoidance area on the substrate is located between the orthographic projection of the light-emitting device and the orthographic projection of the first via on the substrate.

[0009] On the other hand, embodiments of this disclosure also provide a display device, including the aforementioned display panel.

[0010] This disclosure provides an exemplary embodiment of a display panel, a manufacturing method, and a display device. By making the touch signal lines avoid the trace avoidance area, stray light reflected from the touch signal lines into the fingerprint recognition device can be reduced, thereby increasing the valley-ridge ratio and improving fingerprint recognition accuracy.

[0011] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings.

[0012] After reading and understanding the accompanying diagrams and detailed descriptions, other aspects can be understood. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this disclosure.

[0014] Figure 1 This is a schematic diagram showing the proportion of signals in valleys and ridges;

[0015] Figure 2 This is a schematic diagram of TPM reflection;

[0016] Figure 3 This is a schematic diagram of a display panel according to an embodiment of the present disclosure;

[0017] Figure 4A A top view of the green light-emitting device 406 and the first shielding layer 402;

[0018] Figure 4B This is a TPM reflection light path diagram;

[0019] Figure 5 A schematic diagram of a display panel provided in an embodiment of this disclosure;

[0020] Figure 6 This is a schematic diagram of a touch signal line;

[0021] Figure 7 This is a schematic diagram of TPM wiring provided in an embodiment of the present disclosure;

[0022] Figure 8A This is a ray tracing image obtained from the simulation of the display panel before optimization;

[0023] Figure 8B To adopt Figure 7 The ray tracing image obtained from the simulation of the display panel implemented by the scheme shown;

[0024] Figure 9A This is another TPM routing diagram provided in an embodiment of the present disclosure;

[0025] Figure 9B for Figure 8A A schematic diagram of the central touch unit;

[0026] Figure 10A This is a ray tracing image obtained from the simulation of the display panel before optimization;

[0027] Figure 10B To adopt Figure 9A The ray tracing image obtained from the simulation of the display panel implemented by the scheme shown;

[0028] Figure 11 This is a schematic diagram of another touch unit provided in an embodiment of the present disclosure. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this disclosure clearer, embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Note that the implementation methods can be carried out in many different forms. Those skilled in the art will readily understand that the methods and content can be varied in various forms without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be construed as limited to the content described in the following embodiments. Without conflict, the embodiments and features in the embodiments of this disclosure can be arbitrarily combined with each other.

[0030] The ordinal numbers “first,” “second,” and “third” used in this specification are used to avoid confusion among the constituent elements, not to limit their quantity.

[0031] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of each constituent element being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0032] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.

[0033] In this specification, "electrical connection" includes the situation where components are connected together by elements that have a certain electrical function. There are no particular limitations on what constitutes an "electrical function," as long as it allows for the transmission and reception of electrical signals between the connected components. Examples of "electrical functions" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with various functions.

[0034] In this specification, "parallel" refers to the state where the angle formed by two straight lines is greater than or equal to -10° and less than 10°, and therefore also includes the state where the angle is greater than or equal to -5° and less than 5°. Similarly, "perpendicular" refers to the state where the angle formed by two straight lines is greater than or equal to 80° and less than 100°, and therefore also includes the state where the angle is greater than or equal to 85° and less than 95°.

[0035] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer."

[0036] In this disclosure, “about” means a value that is not strictly limited and allows for process and measurement errors.

[0037] The structural features of fingerprints are alternating ridges and valleys. Ridges are the raised parts of the fingerprint texture, while valleys are the recessed parts. In-screen fingerprint recognition based on optical fingerprint technology can utilize display light reflection imaging. This involves collecting the light reflected from the ridges and valleys of the fingerprint when illuminated by the display light, creating an image of alternating light and dark fingerprint patterns, which is then used for fingerprint recognition.

[0038] However, current in-screen fingerprint recognition has a problem: the valley-ridge ratio R is too small. The valley-ridge ratio R is equal to the ratio of the valley-ridge signal difference to the total amount of light received by a single pixel sensor. When the effective fingerprint signal is low, it will lead to a decrease in fingerprint recognition accuracy. Figure 1 The figure shows Q as the total luminous flux (signal quantity) received by the fingerprint sensor during fingerprint recognition. The darker areas represent ridge signals, which are the actual characteristic signals carrying the fingerprint, but these ridge signals only account for a portion of Q. The sensor has a limited full-well capacity (analogous to a wooden bucket, with a limited volume of water it can hold). Increasing the light source intensity does not increase the proportion of ridges R because the total luminous flux received by the sensor consists of three parts: ridge luminous flux, other luminous flux (stray light), and stray luminous flux reflected from the touch panel metal (TPM) (such as...). Figure 2(As shown). Among them, other light flux (stray light) and stray light flux reflected by TPM account for more than 90% of the total light flux. Therefore, if this part of the light flux can be reduced in the design, the proportion of valleys and ridges can be indirectly increased.

[0039] Figure 3 This is a schematic diagram of a display panel, which includes: a substrate 100, a driving circuit layer 200 disposed on the substrate 100, a fingerprint recognition device 300 disposed on the substrate 100, a light-emitting functional layer 400 disposed on the side of the driving circuit layer 200 and the fingerprint recognition device 300 away from the substrate 100, the light-emitting functional layer being used to emit signal light, and a touch layer 500 disposed on the side of the light-emitting functional layer 400 away from the substrate 100. Wherein:

[0040] The driving circuit layer 200 includes pixel driving circuits for driving each color pixel and TFT driving circuits for thin-film transistors. The fingerprint recognition device 300 includes a PIN photodiode, and the driving circuit layer 200 may also include signal connection lines for driving the PIN photodiode.

[0041] The light-emitting functional layer 400 includes a first electrode layer 401, a pixel defining layer 404, a light-emitting layer 406, and a second electrode layer 407. The first electrode layer 401 is disposed on the side of the driving circuit layer 200 away from the substrate 100. The first electrode layer 401 has a first shielding layer 402 with a first via 403 for exposing the underlying fingerprint recognition device 300. The pixel defining layer 404 is disposed on the surface of the first electrode 401 away from the driving circuit layer 200. The pixel defining layer 404 has a second via 405, and light-emitting layers 406 are disposed in the vias. The light-emitting layers emit different colors of light, including but not limited to red, green, and blue. The second electrode layer 407 covers the side of the pixel defining layer 402 away from the substrate 100 and the side of the light-emitting layers away from the substrate. The first electrode can be an anode, and the second electrode can be a cathode, or the first electrode can be a cathode, and the second electrode can be an anode. The first electrode, the second electrode, and the light-emitting layer therein constitute a light-emitting device, such as... Figure 3 As shown in the dashed box, a light-emitting device is used to emit light of a certain color.

[0042] An encapsulation layer 408 and a buffer layer 409 may also be provided on the light-emitting functional layer 400.

[0043] The touch layer 500 includes touch panel metal (TPM), which can be metal or indium tin oxide (ITO).

[0044] The display panel further includes a color filter layer 600 disposed on the side of the light-emitting functional layer 400 away from the substrate 100. The color filter layer 600 includes a second shielding layer 601 and a filter 602. The second shielding layer 601 has a third via 603. Different colored filters are disposed in different vias. The filters include, but are not limited to, red, green and blue filters. The different colored filters correspond to the color pixels in the light-emitting functional layer.

[0045] An organic insulating layer, an encapsulation layer (OCA), and a glass cover layer (UTG) may also be disposed on the color filter layer 600, which are indicated by 700 in the figure.

[0046] The light-emitting layer emits either green or blue light to identify the user's fingerprint. While the display panel's principle is based on mixing red, green, and blue light to achieve color display, for fingerprint recognition, it can choose to display only one color, not red. This is because ambient light transmitted through the user's finger is red light (above 600nm). Using red light for fingerprint recognition would affect accuracy. Therefore, green or blue light is chosen as the signal light for fingerprint identification, improving recognition performance.

[0047] This article uses the example of a green light emitted by the light-emitting layer to identify a user's fingerprint signal as an illustration. Fingerprint recognition devices exhibit more pronounced photosensitivity to green light. The same principle applies when the light emitted by the light-emitting layer is blue.

[0048] The following is combined with Figure 3 The working principle of the fingerprint recognition structure is explained below. During fingerprint recognition, the light-emitting device in the light-emitting functional layer responds to the fingerprint recognition command by outputting green or blue display light. This green display light is emitted through the third via 603 of the second shielding layer 601 to the user's finger, i.e., the interface between the finger and the protective glass. The light reflected and scattered back at the interface (including the signal light generated after being reflected by the user's finger) returns through various film layers and enters the fingerprint recognition device 300 through the third via 603 and the first via 403. The fingerprint recognition device 300 receives the optical signal and converts it into an electrical signal. Due to the different signals reflected by the ridges, fingerprint recognition is performed. The light reflected by the user's finger is shown as the solid line optical path in the figure.

[0049] When the touch layer is positioned between the light-emitting functional layer and the color filter layer, the touch signal line (hereinafter referred to as TPM) also reflects the light emitted by the light-emitting device, which is then incident on the fingerprint recognition device 300 through the first via 403, as shown by the dashed light path in the figure. Since the stray light flux reflected by the TPM in the touch layer 500 affects the valley-ridge ratio, reducing the light flux reflected by the TPM can indirectly increase the valley-ridge ratio.

[0050] In this embodiment of the present disclosure, in order to reduce stray light reflected by the TPM and prevent stray light reflected by the TPM from reaching the fingerprint recognition device, it can be calculated in advance that the reflected light will enter the TPM area of ​​the fingerprint recognition device through the first via 403. This part of the area is used as the TPM routing avoidance area. When designing the TPM routing, the stray light reflected by the TPM can be reduced by avoiding this routing avoidance area.

[0051] Figure 4A This is a top view of the light-emitting device 406 and the first shielding layer 402. The light-emitting device includes a light-emitting element that emits signal light for identifying a user's fingerprint. Figure 4B The diagram shows the optical path of the TPM reflection. As shown, the length of the first shielding layer 402 in the second direction Y is l, with a value ranging from approximately 25-30 μm (micrometers), and the length in the first direction X is w, with a value ranging from approximately 12-22 μm. The fingerprint recognition device 300 is shrunk inward on one side by approximately 2.5 μm relative to the first shielding layer 402, meaning the length of the fingerprint recognition device in the second direction Y ranges from approximately 22.5-27.5 μm, and the length in the first direction X ranges from approximately 9.5-19.5 μm. The size of the first via 403 on the first shielding layer 402 is d, and the shape of the first via 403 can be circular or square, with a value ranging from approximately 3-12 μm.

[0052] Figure 4A The first via 403 is illustrated as a square. This first via 403 is located off-center from the center of the first shielding layer 402. For example... Figure 4A As shown, in the X direction, the distance between the center of the first via 403 and the nearest boundary of the first shielding layer is b. The value of b ranges from approximately 4.5 to 14.5 μm. The value of b can be used to adjust the position of the first via 403 in the Y direction of the first shielding layer.

[0053] Taking the first shielding layer located between the two light-emitting devices 406 as an example, such as Figure 4BAs shown, in the Y direction, one side of the first via 403 is the first green light-emitting device G1 (hereinafter referred to as pixel G1), and the other side is the second green light-emitting device G2 (hereinafter referred to as pixel G2). The distance between pixel G1 and the first via 403 is less than the distance between pixel G2 and the first via 403, that is, the first via 403 is closer to pixel G1 than pixel G2. The distance from the center of the first via 403 to the center of pixel G1 is a1, and the value of a1 is approximately 25-32μm. The distance from the center of the first via 403 to the center of pixel G2 is a2, and the value of a2 is approximately 35-45μm. a1 < a2.

[0054] like Figure 4B As shown, the size of the light-emitting device 406 (in this example, the size of the pixel boundary layer opening of the G pixel, i.e., the size of the second via) is D, and the value of D ranges from approximately 18 to 25 μm. In the depth direction Z perpendicular to the substrate, the distance of TPM from the first via 403 is h, and the value of h ranges from approximately 12 to 20 μm.

[0055] Figure 4B The diagram illustrates four optical paths from the boundary of pixel G1 to the boundary of the first via 403, and four optical paths from the boundary of pixel G2 to the boundary of the first via 403. According to this optical path diagram, the portion (x1+x1'+L1) (hereinafter referred to as area A) represents the TPM location that reflects the light emitted by pixel G1, and the portion (x2+x2'+L2) (hereinafter referred to as area B) represents the TPM location that reflects the light emitted by pixel G2. That is, when the TPM is located in area A, the light emitted by G1 will be reflected by the TPM located in area A, passing through the first via 403 to reach the fingerprint recognition device 300. When the TPM is located in area B, the light emitted by G2 will be reflected by the TPM located in area B, passing through the first via 403 to reach the fingerprint recognition device 300. The TPM traces in other areas will not reflect the light emitted by G1 and G2 to the fingerprint recognition device 300.

[0056] according to Figure 4B From the optical path diagram, the relationship between various parameters in region A and region B can be calculated:

[0057] x1=2h*tan(θ2-θ1) (1)

[0058] x1'+ L1 = D / 2 (2)

[0059] L1=(h / 2h)*(a1-D / 2+d / 2)=(1 / 2)*(a1-D / 2+d / 2) (3)

[0060] x2 = 2h*tan(θ4-θ3) (4)

[0061] x2'+ L2 = D / 2 (5)

[0062] L2=(h / 2h)*(a2-D / 2+d / 2)= (1 / 2)*(a2-D / 2+d / 2) (6)

[0063] Where D is the length of the light-emitting device along the Y direction, d is the length of the first via along the X direction (when the first via is square, d is also the length of the first via along the Y direction; when the first via is circular, d is the diameter of the first via), h is the vertical distance between the first via and the touch signal line, a1 is the distance from the center of the first via 403 to the center of the first light-emitting device, a2 is the distance from the center of the first via 403 to the center of the second light-emitting device, θ1 is the angle between the first boundary light and the plane perpendicular to the substrate, the first boundary light refers to the light emitted from the side of the first light-emitting device away from the first via 403 and reflected by the plane where the touch layer is located to the boundary of the first via 403 away from the first light-emitting device; θ2 is the second boundary light. The angle between the light and the plane perpendicular to the substrate is defined as follows: θ3 is the angle between the light and the plane perpendicular to the substrate; θ4 is the angle between the light and the plane perpendicular to the substrate; θ5 is the angle between the light and the plane perpendicular to the substrate; θ6 is the angle between the light and the plane perpendicular to the substrate; θ7 is the angle between the light and the plane perpendicular to the substrate; θ8 is the angle between the light and the plane perpendicular to the substrate; θ9 is the angle between the light and the plane perpendicular to the substrate; θ1 is the angle between the light and the plane perpendicular to the substrate; θ2 is the angle between the light and the plane perpendicular to the substrate; θ3 is the angle between the light and the plane perpendicular to the substrate; θ4 is the angle between the light and the plane perpendicular to the substrate; θ5 is the angle between the light and the plane perpendicular to the substrate; θ6 is the angle between the light and the plane perpendicular to the substrate; θ7 is the angle between the light and the plane perpendicular to the substrate.

[0064] Considering that in practice, the TPM will not obstruct the emission of G1 and G2 pixels, meaning the TPM routing design will avoid the areas (x1+x1') and (x2+x2'), the size of the (x1+x1') and (x2+x2') areas does not need to be limited. Therefore, in Figure 4B In the process, when there is no TPM in the L1 area, the TPM will not reflect the light of the G1 pixel through the first via and enter the fingerprint recognition device. When there is no TPM in the L2 area, the TPM will not reflect the light of the G2 pixel through the first via and enter the fingerprint recognition device.

[0065] Therefore, the routing avoidance area of ​​TPM (hereinafter referred to as the avoidance area) can be determined as follows: Figure 4AThe area outlined in bold solid lines includes a first clearance area A' with an area of ​​L1*d and a second clearance area B' with an area of ​​L2*d. Optionally, the center of the first clearance area A' and the center of the second clearance area B' in the orthographic projection of the substrate are aligned with the center of the first via 403 in the orthographic projection of the substrate on a straight line extending along a second direction. In an exemplary embodiment, if the first via 403 is circular, then d is the diameter of the circular via.

[0066] Depend on Figure 4A and 4B As can be seen, the orthographic projection of the first avoidance area A' lies between the orthographic projection of pixel G1 and the orthographic projection of the first via, and the orthographic projection of the second avoidance area B' lies between the orthographic projection of pixel G2 and the orthographic projection of the first via. Unless otherwise specified, the orthographic projection referred to herein refers to the orthographic projection on the substrate. The ranges of the first avoidance area A' and the second avoidance area B' obtained based on the above calculations are relatively accurate avoidance area locations.

[0067] After calculating the avoidance zone, the TPM routing can be designed to avoid the first avoidance zone A' and / or the second avoidance zone B', thereby reducing the luminous flux reflected by the TPM and indirectly increasing the valley-ridge ratio. In some embodiments, the TPM routing can be... Figure 4A The portion between the left edge of the first via 403 (near the edge of G1) and the G1 pixel is set as the first clearance area, and the portion between the right edge of the first via 403 (near the edge of G2) and the G2 pixel is set as the second clearance area. The shape and position of the TPM of the touch layer are designed to minimize the area of ​​the TPM in the first clearance area and / or the second clearance area, thereby reducing the reflected light flux.

[0068] Therefore, embodiments of this disclosure provide a display panel, such as Figure 5 As shown, it includes: a substrate 100, a fingerprint recognition device 300 disposed on the substrate, a light-emitting functional layer 400 disposed on the side of the fingerprint recognition device 300 away from the substrate, and a touch layer 500 disposed on the side of the light-emitting functional layer 400 away from the substrate, wherein:

[0069] The light-emitting functional layer 400 includes a plurality of light-emitting devices (411 and 412 in the figure), wherein at least one light-emitting device is used to emit signal light, and a first shielding layer 402 is disposed between the plurality of light-emitting devices. The first shielding layer 402 has a first through hole 403 for exposing the fingerprint recognition device 300.

[0070] The touch layer 500 includes touch signal lines. The orthographic projection of the touch signal lines on the substrate does not coincide with the orthographic projection of the trace avoidance area 800 on the substrate. The orthographic projection of the trace avoidance area 800 on the substrate is located between the orthographic projection of the light-emitting device and the orthographic projection of the first via on the substrate.

[0071] By using the display panel described in this embodiment, and by setting the orthographic projection of the touch signal line on the substrate to not coincide with the orthographic projection of the trace avoidance area on the substrate, the touch signal line can avoid the trace avoidance area, thereby reducing stray light reflected from the touch signal line into the fingerprint recognition device, thus increasing the valley-ridge ratio and improving the fingerprint recognition accuracy.

[0072] In an exemplary embodiment, such as Figure 5 As shown, the trace avoidance area includes a first avoidance area 801. On a plane parallel to the substrate, the orthographic projection of the first avoidance area 801 onto the substrate 100 lies between the orthographic projection of the first light-emitting device 411 and the orthographic projection of the first via 403 onto the substrate 100, and is close to the edge of the first light-emitting device 411. The width of the orthographic projection area of ​​the first avoidance area 801 onto the substrate 100 is the same as the width of the orthographic projection area of ​​the first via 403 onto the substrate 100. The width refers to the length on a plane parallel to the substrate 100, in the direction perpendicular to the extension line direction (second direction Y) of the first light-emitting device 411 and the second light-emitting device 412, i.e. Figure 4A The length in the X direction. The first direction X is perpendicular to the second direction Y. When the first via 403 is circular, the width of the first via is the diameter of the circle. By setting the width of the avoidance area to be the same as the width of the first via, that is, by setting the size of the avoidance area according to the size of the first via and in combination with the characteristics of the optical path, it is possible to more accurately prevent light reflected from the touch signal line from entering the fingerprint recognition device.

[0073] In an exemplary embodiment, the line connecting the center of the first clearance area projected onto the substrate and the center of the first via projected onto the substrate extends along a second direction, i.e., the area where the first clearance area extends in the Y direction from the first via. By precisely setting the range of the first clearance area, light reflected from the touch signal line can be more accurately prevented from entering the fingerprint recognition device.

[0074] In an exemplary embodiment, the maximum length of the first clearance area can be: the distance between the boundary of the light-emitting device near the first via and the boundary of the first via near the light-emitting device, for example... Figure 4AThe length L1' between G1 and the first via 403 is shown in the figure. The length of the avoidance area refers to the length of the avoidance area in the direction of the extension line of the first light-emitting device 411 and the second light-emitting device 412 on a plane parallel to the substrate 100. By setting the length to L1', the process of calculating L1 can be omitted. However, in order to set the trace avoidance area more accurately and provide more trace space, the length L1 of the first avoidance area can be determined according to the length D of the first light-emitting device and the length d of the first via in the second direction, as well as the distance a1 between the center of the first light-emitting device and the center of the first via. Optionally, the length L1 of the first avoidance area A' (801) can be calculated using the aforementioned formula (3).

[0075] In an exemplary embodiment, such as Figure 5 As shown, the trace avoidance area further includes a second avoidance area 802. On a plane parallel to the substrate, the orthographic projection of the second avoidance area 802 onto the substrate 100 is located between the orthographic projection of the second light-emitting device 412 (used to emit signal light for recognizing user fingerprints) and the orthographic projection of the first via 403 onto the substrate 100, and is close to the edge of the light-emitting device. The centers of the first and second avoidance areas on the substrate's orthographic projection, and the center of the first via on the substrate's orthographic projection, are on a straight line extending along a second direction. The width of the orthographic projection area of ​​the second avoidance area 802 onto the substrate 100 is the same as the width of the orthographic projection area of ​​the first via 403 onto the substrate 100. Similarly, in this embodiment, the width refers to the length on a plane parallel to the substrate 100, in a direction perpendicular to the extension line direction (second direction Y) of the first and second light-emitting devices 411 and 412, i.e. Figure 4A The length in the X direction. By setting the width of the avoidance area to be the same as the width of the first via, that is, by setting the size of the avoidance area based on the size of the first via and the characteristics of the optical path, it is possible to more accurately prevent light reflected from the touch signal line from entering the fingerprint recognition device.

[0076] In an exemplary embodiment, the line connecting the center of the second clearance area projected onto the substrate and the center of the first via projected onto the substrate extends in the opposite direction to the second direction, i.e., the area where the second clearance area extends in the opposite direction to the Y direction of the first via. By precisely setting the range of the second clearance area, light reflected from the touch signal line can be more accurately prevented from entering the fingerprint recognition device.

[0077] In an exemplary embodiment, the maximum length of the second clearance area can be: the distance between the boundary of the light-emitting device near the first via and the boundary of the first via near the light-emitting device, for example... Figure 4AThe length L2' between G2 and the first via 403 is shown. By setting the length to L2', the process of calculating L2 can be omitted. However, in order to set the routing avoidance area more accurately and provide more routing space, the length L2 of the second avoidance area can be determined according to the length D of the second light-emitting device in the second direction, the length d of the first via, and the distance a2 between the center of the second light-emitting device and the center of the first via. Optionally, the length L2 of the second avoidance area B' (802) can be calculated using the aforementioned formula (6).

[0078] Figure 6 This is a schematic diagram of a touch signal line. (Example) Figure 6 As shown, the touch layer 500 includes multiple touch units, each of which includes four intersecting touch signal lines (hereinafter referred to as signal lines). The linewidth w1 of the signal lines ranges from approximately 2.5 to 4.5 μm. A touch unit includes a first signal line 501, a second signal line 502, a third signal line 503, and a fourth signal line 504. The first signal line 501 and the third signal line 503 extend in the same direction, both along a direction forming an acute angle with the second direction Y (the third direction). The second signal line 502 and the fourth signal line 504 extend in the same direction, both along a direction forming an acute angle with the first direction X (the fourth direction). The third and fourth directions can be perpendicular or not. Multiple touch units are connected together to form an array-arranged grid structure. The shape and size of the grid can be the same or different. Isolation of the grid patterns of adjacent touch electrodes can be achieved by setting cuts on the grid. Touch action recognition can be achieved by detecting the capacitance (or voltage) of the touch electrodes using an integrated circuit (IC).

[0079] exist Figure 6 In the middle, the orthographic projection of the second signal line 502 and the orthographic projection of the second avoidance area B' overlap, which will cause the second signal line 502 in the overlapping area to reflect the light emitted by the G2 pixel, thereby reducing the proportion of valley ridge.

[0080] Figure 7This embodiment of the present disclosure provides a TPM routing optimization design scheme. For ease of illustration, R pixels and B pixels are not shown. In this example, the touch unit includes a first signal line 501, a second signal line 502, a third signal line 503, and a fourth signal line 504. One end of the first signal line 501, one end of the third signal line 503, and one end of the fourth signal line 504 intersect. The other end of the first signal line 501 extends in a third direction, the other end of the fourth signal line 504 extends in a fourth direction, and the other end of the third signal line 503 extends in the opposite direction to the third direction. The second signal line 502... 2 includes a first sub-segment 5021 and a second sub-segment 5022 that are interconnected. One end of the first sub-segment 5021 is connected to the first signal line 501. The other end of the first sub-segment 5021 extends in the opposite direction to the second direction and connects to one end of the second sub-segment 5022. The other end of the second sub-segment 5022 extends in the opposite direction to the fourth direction. The fourth direction intersects the third direction, and the angle between the fourth direction and the first direction is smaller than the angle between the second direction and the first direction, smaller than the angle between the third direction and the first direction, and smaller than the angle between the opposite direction of the first direction and the first direction. Figure 6 In contrast, by changing the direction of some traces of the second signal line 502, the traces in the area with a width of d between G1 and G2 are reduced as much as possible, thereby reducing the light reflected into the fingerprint recognition device by the TPM and increasing the valley ridge ratio.

[0081] In an exemplary embodiment, in a first direction, the distance between the orthographic projection of the first segment 5021 near the boundary of the first via 403 and the orthographic projection of the first center line C of the touch unit ( Figure 7 k1), is greater than or equal to the distance between the orthographic projection of the first boundary of the first via 403 near the first sub-segment 5021 and the orthographic projection of the first center line C of the touch unit. Figure 7 In the second direction, k1≥k2≥0; the orthographic projection of the first center line C of the touch unit is not within the orthographic projection range of the first via, wherein the first center line of the touch unit is the center line extending along the second direction of the touch unit. Wherein, the orthographic projection of the first center line C of the touch unit is not within the orthographic projection range of the first via means that the center line C can coincide with the boundary of the first via or be located outside the orthographic projection range of the first via. By setting the position range of the touch unit in the first direction, excessive entry of the touch unit traces into the avoidance area can be avoided as much as possible, thus achieving a better effect of preventing TPM trace reflection light from entering the fingerprint recognition sensor.

[0082] In an exemplary embodiment, the region formed by the extension line of the first boundary of the first via (the boundary of the first via 403 near the first sub-segment 5021) and the extension line of the second boundary of the first via (the boundary opposite to the first boundary) is defined as the extension region, that is, the region between G1 and G2 with a width of d. Figure 7 In this context, the first boundary and the second boundary are the two boundaries of the first via in the first direction. The extension area extends along the second direction. Within the extension area, the distance between the boundary of the touch unit in the second direction and the light-emitting device near the boundary is greater than a preset clearance length. Within the extension area, the boundary of the touch unit in the second direction includes: the first boundary of the touch unit in the second direction within the extension area and the second boundary of the touch unit in the second direction, such as... Figure 7 As shown, within a region of width d between G1 and G2, the first signal line 501 has an upper boundary (i.e., the first boundary of the aforementioned touch unit) and a lower boundary (i.e., the second boundary of the aforementioned touch unit). The distance between the upper boundary and the light-emitting device G1 is greater than a preset first avoidance length, i.e., L1, and the distance between the lower boundary and the light-emitting device G2 is greater than a preset second avoidance length, i.e., L2. Depending on the routing, either the first avoidance area or the second avoidance area can be avoided. By setting the position range of the touch unit in the second direction, excessive entry of the touch unit routing into the avoidance area can be avoided as much as possible, thus achieving a better effect of preventing the TPM routing reflected light from entering the fingerprint recognition sensor.

[0083] In an exemplary embodiment, the first touch signal line, the second sub-segment of the second touch signal line, the third touch signal line, and the fourth touch signal line may be configured to have a first width w1, and the first sub-segment of the second touch signal line may have a second width w2. The length s2 and width w2 of the first sub-segment satisfy the following requirement: w2*s2 = w1*s1, where s1 is the distance from the connection point of the first sub-segment and the second sub-segment to the intersection point of the first touch signal line, the third touch signal line, and the fourth touch signal line. This ensures that the resistance value of the optimized touch unit remains unchanged. For example, this can be achieved by making... Figure 7 The area of ​​the middle touch unit and Figure 6The touch unit area is kept constant. For example, when the length and width of other signal lines in the touch unit remain unchanged (i.e., the length and width of the first signal line 501, the third signal line 503, and the fourth signal line 504 remain unchanged), the extension direction of the second sub-segment 5022 is still the same as the extension direction of the fourth signal line 504, and the width of the second sub-segment 5022 remains w1, the area reduction ΔS of the signal line is: ΔS = w1 * s1. The width of the first sub-segment changes to w2, the length is s2, and its area is Snew = w2 * s2. To ensure that the TPM trace resistance remains unchanged after optimization, Snew = ΔS, i.e., w2 * s2 = w1 * s1. In other embodiments, the length and width of other signal lines in the touch unit can also be changed, as long as the orthographic projection of the signal line does not intersect with the orthographic projection of the TPM avoidance area, and the difference between the overall area of ​​the optimized signal line and the overall area of ​​the signal line before optimization is less than a preset threshold (an allowable error range).

[0084] use Figure 7 After optimizing the TPM routing, the stray light ΔQbase introduced by the TPM decreased from 1 to 0.19, and the valley-ridge ratio R increased from 1.18% to 1.26%. It can be seen that the optimized TPM layout reduced the increase in stray light, indirectly improving fingerprint performance. Moreover, the estimated ratio R after optimization meets the product technical parameters and performance requirements (spec). Figure 8A and Figure 8B To optimize the ray tracing simulation images of the front and rear panels, by Figure 8B It is evident that the optimized TPM traces reduce the reflection of light emitted by the G2 pixel. In summary, this embodiment optimizes the arrangement of the TPM signal lines above the fingerprint recognition device by considering the positional relationship between the TPM signal lines, the first via 403 in the first shielding layer, and the display sub-pixels, ultimately reducing the total stray light (Q) and indirectly increasing the ridge-valley ratio (R). Furthermore, the above design is adaptable to any OLED pixel arrangement.

[0085] Figure 9A Another TPM routing optimization design scheme provided in this embodiment of the disclosure, for ease of illustration, does not show R pixels and B pixels. Figure 9B for Figure 9AA schematic diagram of the touch unit. In this example, the touch unit includes a second signal line 502, a first signal line 501, a fifth signal line 505, a fourth signal line 504, and a third signal line 503 connected in sequence. One end of the first signal line 501 is connected to one end of the fifth signal line 505, forming a first connection point. The other end of the first signal line 501 extends in a third direction. The other end of the fifth signal line 505 extends in a first direction and is connected to one end of the fourth signal line 504, forming a second connection point. The other end of the fourth signal line 504 extends in a fourth direction. The second signal line 502 includes a first segment 5. The first sub-segment 5021 and the second sub-segment 5022 are defined as follows: one end of the first sub-segment 5021 is connected to the first connection point; the other end of the first sub-segment 5021 extends in the opposite direction of the second direction and connects to one end of the second sub-segment 5022; the other end of the second sub-segment 5022 extends in the opposite direction of the fourth direction. The third signal line 503 includes a third sub-segment 5031 and a fourth sub-segment 5032. One end of the third sub-segment 5031 is connected to the second connection point; the other end of the third sub-segment extends in the opposite direction of the second direction and connects to one end of the fourth sub-segment; the other end of the fourth sub-segment extends in the opposite direction of the third direction. Figure 6 In contrast, by changing the routing settings in the central area of ​​the touch unit, the routing in the area between G1 and G2 with a width of d is reduced as much as possible, thereby reducing the light reflected from the TPM into the fingerprint recognition device and increasing the valley-ridge ratio.

[0086] In an exemplary embodiment, in the first direction, the distance between the orthographic projection of the first segment 5021 near the first boundary of the first via 403 and the orthographic projection of the first center line C of the touch unit (k3 in the figure) is greater than or equal to the distance between the orthographic projection of the first boundary of the first via 403 and the orthographic projection of the first center line C of the touch unit (k4 in the figure), k3≥k4≥0. The distance between the orthographic projection of the third segment 5031 near the second boundary of the first via and the orthographic projection of the first via 403 near the second boundary of the third segment 5031 is greater than or equal to 0 (k5 in the figure), i.e., k5≥0. As mentioned above, the boundary of the first via 403 near the first segment 5021 is the first boundary, and the boundary opposite to the first boundary is the second boundary. By setting the position range of the touch unit in the first direction, excessive entry of the touch unit traces into the avoidance area can be avoided as much as possible, thus achieving a better effect of preventing TPM trace reflections from entering the fingerprint sensor.

[0087] In an exemplary embodiment, the region formed by the extension lines of the first boundary of the first via and the extension lines of the second boundary of the first via is defined as the extension region, that is, the region between G1 and G2 with a width of d. Figure 9A In this context, the first boundary and the second boundary are the two boundaries of the first via in the first direction. The extension area extends along the second direction. Within the extension area, the distance between the boundary of the fifth signal line 505 of the touch unit and the light-emitting device near the boundary is greater than a preset clearance length. Within the extension area, the boundary of the fifth signal line 505 includes a third boundary and a fourth boundary in the second direction, such as... Figure 9A As shown, within the area between G1 and G2 and with a width of d, the fifth signal line 505 has an upper boundary (i.e., the aforementioned third boundary of the fifth signal line) and a lower boundary (i.e., the aforementioned fourth boundary of the fifth signal line). The distance between the upper boundary and the light-emitting device G1 is greater than the preset first clearance length, i.e., L1, and the distance between the lower boundary and the light-emitting device G2 is greater than the preset second clearance length, i.e., L2. By setting the position range of the touch unit in the second direction, excessive entry of the touch unit traces into the clearance area can be avoided as much as possible, thus achieving a better effect of preventing the TPM traces from reflecting light into the fingerprint sensor.

[0088] In an exemplary embodiment, the center line of the touch unit along the second direction Y can be set ( Figure 9A The center line C is symmetrical.

[0089] In this embodiment, the optimized oblique TPM routing compared to Figure 6 The TPM traces are shortened, while three additional traces are added to the orthographic projection area of ​​the first shielding layer: the first sub-segment 5021, the fifth signal line 505, and the third sub-segment 5031. This trace design allows the TPM traces to avoid the TPM avoidance area. Figure 9B As shown, the linewidths of the first sub-segment 5021, the fifth signal line 505, and the third sub-segment 5031 are w3, while the linewidths of the other signal lines (the second sub-segment 5022, the first signal line 501, the fourth signal line 504, and the fourth sub-segment 5032) are w1. The value of w1 ranges from approximately 2.5 to 4.5 μm. The length of the first via 403 in the first direction is d, with a value ranging from approximately 2.5 to 12 μm. To achieve better avoidance, w1 = w3 ≤ d. Optionally, the orthographic projection of the fifth signal line 505 onto the substrate can be set to coincide with the orthographic projection of the first via 403 onto the substrate, which can better prevent light reflected from the TPM signal line from entering the first via 403.

[0090] In an exemplary embodiment, the position of the fifth signal line 505 can be adjusted up and down in the Y direction, as long as it does not overlap with the TPM avoidance zone.

[0091] The first sub-segment 5021 and the third sub-segment 5031 are mainly used to make the TPM signal traces electrically connected. The first sub-segment 5021 and the third sub-segment 5031 can also be adjusted left and right in the x direction, as long as they do not overlap with the TPM avoidance area.

[0092] In an exemplary embodiment, the following is adopted: Figure 9A and 9B This structural design of the touch unit allows for adjustments to the length and width of the traces to ensure that the resistance value of the optimized touch unit is as similar as possible to that of the original touch unit.

[0093] use Figure 9A After optimizing the TPM routing, the stray light ΔQbase introduced by the TPM decreased from 1 to 0.092, and the valley-ridge ratio R increased from 1.18% to 1.27%. It can be seen that the optimized TPM layout reduced the increase in stray light, indirectly improving fingerprint performance. Moreover, the estimated ratio R after optimization meets the product technical parameters and performance requirements (spec). Figure 10A and Figure 10B To optimize the ray tracing simulation images of the front and rear panels, by Figure 10B It is evident that the optimized TPM traces effectively reduce the reflection of light emitted by the G3 pixel. In summary, this embodiment, by combining the positional relationship between the TPM signal lines, the first via 403 in the first shielding layer, and the display sub-pixels, optimizes the arrangement of the TPM signal lines above the fingerprint recognition device, ultimately reducing the total stray light (Q) and indirectly increasing the ridge-valley ratio (R). This design is applicable to any OLED pixel arrangement.

[0094] Figure 11 Another TPM routing optimization design scheme provided in this embodiment of the present disclosure is that, in this example, the routing shape in the touch unit is not changed, but the entire touch unit is moved to the left to avoid the avoidance area. The dashed box in the figure is the original position of the touch unit. This method can also reduce the amount of TPM reflected light entering the fingerprint recognition device.

[0095] The above embodiment illustrates the use of green light emitted by the light-emitting functional layer to identify a user's fingerprint as an example. In other embodiments, when other colors of light emitted by the light-emitting functional layer are also used as signal light for identifying a user's fingerprint, for example, to prevent the touch signal line from reflecting blue light into the fingerprint recognition device, a third trace avoidance area can be provided between the light-emitting device emitting blue light and the first via. This third trace avoidance area is located close to the light-emitting device, and the line connecting the center projection of the third trace avoidance area and the center projection of the first via extends along a first direction. The width of the third trace avoidance area can be the same as the length of the first via in the first direction. By designing the trace shape of the touch signal line in the touch unit to avoid this third avoidance area, the amount of TPM reflected light entering the fingerprint recognition device is reduced, indirectly increasing the valley-ridge ratio.

[0096] The light-emitting functional layer in this embodiment is implemented, for example, using a COE module. COE (CF On Encapsulation) refers to a technique of placing a filter on a thin-film encapsulation (TFE). The substrate 100 may be a flexible substrate coated with a polyimide (PI) layer.

[0097] The in-cell fingerprint recognition solution provided in this disclosure can reduce stray light reflected from TPM traces through optical design and touch unit wiring design, thereby indirectly improving fingerprint performance.

[0098] This disclosure also provides a method for manufacturing a display panel, comprising:

[0099] A fingerprint recognition device is formed on a substrate;

[0100] A light-emitting functional layer is formed on the side of the fingerprint recognition device away from the substrate. The light-emitting functional layer includes a plurality of light-emitting devices, wherein at least one light-emitting device is used to emit signal light for recognizing the user's fingerprint. A first shielding layer is disposed between the plurality of light-emitting devices. The first shielding layer has a first through hole for exposing the fingerprint recognition device.

[0101] A touch layer is formed on the side of the light-emitting functional layer away from the substrate. The touch layer includes touch signal lines that avoid a pre-set trace avoidance area. The orthographic projection of the trace avoidance area on the substrate is located between the orthographic projection of the light-emitting device for emitting signal light for recognizing the user's fingerprint and the orthographic projection of the first via on the substrate.

[0102] By employing the display panel manufacturing method described in this embodiment, and by making the touch signal lines avoid the trace avoidance area, stray light reflected from the touch signal lines into the fingerprint recognition device can be reduced, thereby increasing the valley-ridge ratio and improving fingerprint recognition accuracy.

[0103] In an exemplary embodiment, the trace avoidance area includes a first avoidance area. The orthographic projection of the first avoidance area on the substrate is located between the orthographic projection of the first light-emitting device used to emit signal light for recognizing a user's fingerprint and the orthographic projection of the first via on the substrate. The width of the orthographic projection area of ​​the first avoidance area on the substrate is the same as the width of the orthographic projection area of ​​the first via on the substrate. The length of the first avoidance area is determined based on the length of the first light-emitting device and the length of the first via in the length direction, as well as the distance between the center of the first light-emitting device and the center of the first via. The line connecting the center of the orthographic projection of the first avoidance area on the substrate and the center of the orthographic projection of the first via on the substrate extends along a second direction. The width refers to the length in the first direction, and the length refers to the length in the second direction. The first direction is perpendicular to the second direction. By setting the length and width of the first avoidance area, the light emitted by the first light-emitting device reflected by the touch signal line can be more accurately prevented from entering the fingerprint recognition device. For example, the length L1 of the first avoidance area can be calculated using the aforementioned formula (3).

[0104] In an exemplary embodiment, the trace avoidance area includes a second avoidance area. The orthographic projection of the second avoidance area on the substrate is located between the orthographic projection of the second light-emitting device used to emit signal light for recognizing a user's fingerprint and the orthographic projection of the first via on the substrate. The width of the orthographic projection area of ​​the second avoidance area on the substrate is the same as the width of the orthographic projection area of ​​the first via on the substrate. The length of the second avoidance area is determined based on the length of the second light-emitting device and the length of the first via in the length direction, as well as the distance between the center of the second light-emitting device and the center of the first via. The line connecting the center of the orthographic projection of the second avoidance area on the substrate and the center of the orthographic projection of the first via on the substrate extends along a second direction. The width refers to the length in the first direction, and the length refers to the length in the second direction. The first direction is perpendicular to the second direction. By setting the length and width of the second avoidance area, the light emitted by the second light-emitting device reflected by the touch signal line can be more accurately prevented from entering the fingerprint recognition device. For example, the length L2 of the second avoidance area can be calculated using the aforementioned formula (6).

[0105] This disclosure also provides a display device, including the display panel of the foregoing embodiments. The display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0106] While the embodiments disclosed herein are as described above, the content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A display panel, characterized in that, include: A substrate, a fingerprint recognition device disposed on the substrate, a light-emitting functional layer disposed on the side of the fingerprint recognition device away from the substrate, and a touch layer disposed on the side of the light-emitting functional layer away from the substrate, wherein: The light-emitting functional layer includes multiple light-emitting devices, at least one of which is used to emit signal light. A first shielding layer is disposed between the multiple light-emitting devices, and the first shielding layer has a first through hole for exposing the fingerprint recognition device. The touch layer includes touch signal lines. The orthographic projection of the touch signal lines on the substrate does not coincide with the orthographic projection of the trace avoidance area on the substrate. The orthographic projection of the trace avoidance area on the substrate is located between the orthographic projection of the light-emitting device and the orthographic projection of the first via on the substrate.

2. The display panel according to claim 1, characterized in that, The trace avoidance area includes a first avoidance area. On a plane parallel to the substrate, the orthographic projection of the first avoidance area on the substrate is located between the orthographic projection of the light-emitting device and the orthographic projection of the first via on the substrate and is close to the edge of the light-emitting device. The width of the orthographic projection area of ​​the first avoidance area on the substrate is the same as the width of the orthographic projection area of ​​the first via on the substrate. The line connecting the center of the orthographic projection of the first avoidance area on the substrate and the center of the orthographic projection of the first via on the substrate extends along a second direction. The width refers to the length in a first direction, and the first direction is perpendicular to the second direction. The length of the first clearance zone is determined based on the length of the light-emitting device in the second direction, the length of the first via, and the distance between the center of the light-emitting device and the center of the first via.

3. The display panel according to claim 2, characterized in that, The length L1 of the first avoidance zone is calculated using the following formula: L1=(1 / 2)*(a1-D / 2+d / 2) Where a1 is the distance between the center of the light-emitting device projected onto the substrate and the center of the first via projected onto the substrate, D is the length of the light-emitting device in the second direction, and d is the length of the first via in the second direction.

4. The display panel according to any one of claims 2 or 3, characterized in that, The trace avoidance area also includes a second avoidance area. On a plane parallel to the substrate, the orthographic projection of the second avoidance area on the substrate is located between the orthographic projection of the light-emitting device and the orthographic projection of the first via on the substrate, and is close to the edge of the light-emitting device. The center of the orthographic projection of the first avoidance area on the substrate, the center of the orthographic projection of the second avoidance area on the substrate, and the center of the orthographic projection of the first via on the substrate are on a straight line extending along a second direction. The width of the orthographic projection area of ​​the second avoidance area on the substrate is the same as the width of the orthographic projection area of ​​the first via on the substrate. The line connecting the center of the orthographic projection of the second avoidance area on the substrate and the center of the orthographic projection of the first via on the substrate extends along the second direction. The width refers to the length in the first direction, which is perpendicular to the second direction. The length of the second clearance zone is determined based on the length of the light-emitting device in the second direction, the length of the first via, and the distance between the center of the light-emitting device and the center of the first via.

5. The display panel according to claim 4, characterized in that, The length L2 of the second avoidance zone is calculated using the following formula: L2=(1 / 2)*(a2-D / 2+d / 2) Where a2 is the distance between the center of the light-emitting device projected onto the substrate and the center of the first via projected onto the substrate, D is the length of the light-emitting device in the second direction, and d is the length of the first via in the second direction.

6. The display panel according to claim 1, characterized in that, The touch layer includes multiple touch units, each touch unit including a first touch signal line, a second touch signal line, a third touch signal line, and a fourth touch signal line. One end of the first touch signal line, one end of the third touch signal line, and one end of the fourth touch signal line intersect. The other end of the first touch signal line extends in a third direction, the other end of the fourth touch signal line extends in a fourth direction, and the other end of the third touch signal line extends in the opposite direction of the third direction. The second touch signal line includes a first sub-segment and a second sub-segment connected to each other. One end of the first sub-segment is connected to the first touch signal line, and the other end of the first sub-segment extends in the opposite direction of the second direction and connects to one end of the second sub-segment. The other end of the second sub-segment extends in the opposite direction of the fourth direction. The fourth direction intersects with the third direction.

7. The display panel according to claim 6, characterized in that, In the first direction, the distance between the orthographic projection of the first sub-segment near the boundary of the first via and the orthographic projection of the first center line of the touch unit is greater than or equal to the distance between the orthographic projection of the first via near the first boundary of the first sub-segment and the orthographic projection of the first center line of the touch unit, wherein the orthographic projection of the first center line of the touch unit is not within the orthographic projection range of the first via, wherein the first center line of the touch unit is the center line of the touch unit extending along the second direction; The first direction is perpendicular to the second direction, and the angle between the fourth direction and the first direction is smaller than the angle between the second direction and the first direction, which is smaller than the angle between the third direction and the first direction. The extension line of the first boundary of the first via and the extension line of the second boundary of the first via form an extension area. The second boundary is the boundary opposite to the first boundary. The first boundary and the second boundary are the two boundaries of the first via in the first direction. The extension area extends along the second direction. In the extension area, the distance between the boundary of the touch unit in the second direction and the light-emitting device near the boundary is greater than a preset avoidance length.

8. The display panel according to claim 7, characterized in that, The first touch signal line, the second segment of the second touch signal line, the third touch signal line, and the fourth touch signal line have a first width w1, and the first segment of the second touch signal line has a second width w2. The length s2 and width w2 of the first segment meet the following requirements: w2*s2= w1*s1, where s1 is the distance from the connection point of the first sub-segment and the second sub-segment to the intersection of the first touch signal line, the third touch signal line and the fourth touch signal line.

9. The display panel according to claim 1, characterized in that, The touch layer includes multiple touch units, each including a second touch signal line, a first touch signal line, a fifth touch signal line, a fourth touch signal line, and a third touch signal line connected sequentially. One end of the first touch signal line is connected to one end of the fifth touch signal line to form a first connection point. The other end of the first touch signal line extends in a third direction. The other end of the fifth touch signal line extends in a first direction and is connected to one end of the fourth touch signal line to form a second connection point. The other end of the fourth touch signal line extends in a fourth direction. The second touch signal line includes a first sub-segment and a second sub-segment. One end of the first sub-segment is connected to the first connection point. The other end of the first sub-segment extends in the opposite direction of the second direction and is connected to one end of the second sub-segment. The other end of the second sub-segment extends in the opposite direction of the fourth direction. The third touch signal line includes a third sub-segment and a fourth sub-segment. One end of the third sub-segment is connected to the second connection point. The other end of the third sub-segment extends in the opposite direction of the second direction and is connected to one end of the fourth sub-segment. The other end of the fourth sub-segment extends in the opposite direction of the third direction. The fourth direction intersects with the third direction.

10. The display panel according to claim 9, characterized in that, In the first direction, the distance between the orthographic projection of the first segment near the first boundary of the first via and the orthographic projection of the first center line of the touch unit is greater than or equal to the distance between the orthographic projection of the first boundary of the first via and the orthographic projection of the first center line of the touch unit, and the distance between the orthographic projection of the third segment near the second boundary of the first via and the orthographic projection of the second boundary of the first via is greater than or equal to 0, the first boundary of the first via is the boundary near the first segment, and the second boundary is the boundary opposite to the first boundary; The first direction is perpendicular to the second direction, and the angle between the fourth direction and the first direction is smaller than the angle between the second direction and the first direction, which is smaller than the angle between the third direction and the first direction. The extension lines of the first boundary of the first via and the extension lines of the second boundary of the first via form an extension area. The second boundary is the boundary opposite to the first boundary. The first boundary and the second boundary are the two boundaries of the first via in the first direction. The extension area extends along the second direction. Within the extension area, the distance between the boundary of the fifth touch signal line of the touch unit and the light-emitting device near the boundary is greater than a preset avoidance length.

11. The display panel according to claim 9, characterized in that, The orthographic projection of the fifth touch signal line onto the substrate coincides with the orthographic projection of the first via onto the substrate.

12. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 11.

Images