Under-screen fingerprint identification module, display assembly and display device

Abstract

A screen-under fingerprint identification module, display assembly and display device, the screen-under fingerprint identification module comprises: a substrate (101), a plurality of fingerprint identification units arranged on the substrate (101), each fingerprint identification unit comprises a photosensitive unit (S), an optical structure arranged on the photosensitive surface side of the photosensitive unit (S), the optical structure comprises a light transmission ring (H) and a light transmission hole (K), the light transmission ring (H) and the light transmission hole (K) are sequentially arranged in the direction away from the photosensitive unit (S), the orthographic projection of the light transmission ring (H) on the photosensitive unit (S) is completely located on the photosensitive surface of the photosensitive unit (S), and the orthographic projection of the light transmission hole (K) on the light transmission ring (H) is located in the non-light transmission area surrounded by the light transmission ring (H). By means of the optical structure, the signal light with a larger angle for fingerprint identification is guided to enter the photosensitive unit (S) through the light transmission hole (K) and the light transmission ring (H), so that the ambient light with a smaller angle is blocked by the non-light transmission area surrounded by the light transmission ring (H) after passing through the light transmission hole (K), thereby avoiding the interference of the ambient light on the photosensitive unit (S) and improving the accuracy of fingerprint identification.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to an under-display fingerprint recognition module, display component, and display device. Background Technology

[0002] In OLED (Organic Light Emitting Diode) under-display fingerprint recognition technology, one approach is called the under-display point light source solution. In this solution, the OLED display substrate and the under-display fingerprint recognition module are independent of each other. The OLED display substrate illuminates specific light-emitting points, and the light emitted from these points illuminates the fingerprint. After total internal reflection by the fingerprint's ridges, the light carries the fingerprint's ridge information and is ultimately detected and imaged by the under-display fingerprint recognition module.

[0003] The above structure has the following problem: the under-display fingerprint recognition module is affected by ambient light. The stronger the ambient light, the greater the impact, and the under-display fingerprint recognition module may even fail to form an image. Summary of the Invention

[0004] This disclosure provides an under-display fingerprint recognition module, a display component, and a display device to solve the problem that the under-display fingerprint recognition module suffers from poor imaging effect or even no imaging due to interference from external ambient light.

[0005] To solve the above-mentioned technical problems, this disclosure is implemented as follows:

[0006] In a first aspect, embodiments of this disclosure provide an under-display fingerprint recognition module, comprising: a substrate and a plurality of fingerprint recognition units disposed on the substrate, each fingerprint recognition unit comprising a photosensitive unit and an optical structure disposed on one side of the photosensitive surface of the photosensitive unit, the optical structure comprising a light-transmitting ring and a light-transmitting hole, the light-transmitting ring and the light-transmitting hole being sequentially disposed in a direction away from the photosensitive unit, the light-transmitting ring being formed on a first light-shielding layer, the light-transmitting hole being formed on a second light-shielding layer, the orthogonal projection of the light-transmitting ring on the photosensitive unit being at least partially located on the photosensitive surface of the photosensitive unit, and the orthogonal projection of the light-transmitting hole on the light-transmitting ring being located within an opaque area surrounded by the light-transmitting ring.

[0007] Optionally, the angle formed by the line connecting any point in the light-transmitting hole and any point on the light-transmitting ring with the reference line is within a preset angle range, and the reference line is perpendicular to the substrate.

[0008] Optionally, the preset angle range is 40°-75°.

[0009] Optionally, the light-transmitting ring and the light-transmitting hole satisfy at least one of the following conditions:

[0010] The diameter of the light-transmitting hole is 2–20 μm;

[0011] The diameter of the outer ring of the light-transmitting ring is 12–300 μm;

[0012] The diameter of the inner ring of the light-transmitting ring is 5–50 μm;

[0013] The distance between the light-transmitting ring and the light-transmitting hole is 2 to 50 μm.

[0014] Optionally, the photosensitive unit includes: a first electrode, a photosensitive layer, and a second electrode, wherein the first electrode, the photosensitive layer, and the second electrode are sequentially arranged in a direction away from the substrate, and the second electrode is a light-transmitting electrode; the under-display fingerprint recognition module further includes: a first insulating layer and a signal line layer disposed on the side of the second electrode away from the substrate, wherein the signal line in the signal line layer is connected to the second electrode through a via on the first insulating layer, and the first light-shielding layer is made of the same material as the signal line.

[0015] Optionally, the under-display fingerprint recognition module further includes: a light-transmitting shielding layer disposed on the side of the photosensitive unit away from the substrate, and a second light-shielding layer disposed on the side of the light-transmitting shielding layer away from the substrate.

[0016] Optionally, the second light-shielding layer is made of a conductive material and is stacked adjacent to the light-transmitting shielding layer.

[0017] Optionally, the under-display fingerprint recognition module further includes a second insulating layer disposed between the second light-shielding layer and the light-transmitting shielding layer.

[0018] Optionally, the optical structure is a separate component, attached to one side of the photosensitive surface of the photosensitive unit by optical adhesive, or the optical structure is located on the side of the under-display fingerprint recognition module furthest from the substrate.

[0019] Optionally, each of the optical structures includes at least one set of the light-transmitting rings and light-transmitting holes.

[0020] Optionally, each set of light-transmitting rings and light-transmitting holes includes at least one light-transmitting ring and one light-transmitting hole, wherein the at least one light-transmitting ring is arranged sequentially from the direction closest to the photosensitive unit to the direction furthest from the photosensitive unit.

[0021] In a second aspect, embodiments of this disclosure provide a display component, including a display substrate and the fingerprint recognition module described in the first aspect above. The display substrate includes a plurality of light-emitting units and is disposed on the side of the fingerprint recognition module away from the substrate.

[0022] Optionally, the display substrate is bonded to the fingerprint recognition module.

[0023] Thirdly, embodiments of this disclosure provide a display device including the display components described in the second aspect.

[0024] In this embodiment of the present disclosure, an optical structure guides the signal light with a larger angle used for fingerprint recognition through the light-transmitting hole and the light-transmitting ring into the photosensitive unit. This allows ambient light with a smaller angle to pass through the light-transmitting hole and be blocked by the opaque area surrounded by the light-transmitting ring, thereby avoiding interference from ambient light to the photosensitive unit and improving the accuracy of fingerprint recognition. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 This is a schematic diagram of the membrane structure of a fingerprint recognition module according to an embodiment of the present disclosure;

[0027] Figure 2 This is a three-dimensional structural diagram of an optical structure according to an embodiment of the present disclosure;

[0028] Figure 3 This is a top view of a fingerprint recognition module according to an embodiment of the present disclosure;

[0029] Figure 4A This is a cross-sectional view of an optical structure according to an embodiment of the present disclosure;

[0030] Figure 4B This is a cross-sectional view of an optical structure according to another embodiment of the present disclosure;

[0031] Figure 5 This is a schematic diagram of the membrane structure of a fingerprint recognition module according to another embodiment of the present disclosure;

[0032] Figure 6 This is a cross-sectional view of a fingerprint recognition unit according to an embodiment of the present disclosure;

[0033] Figure 7 This is a cross-sectional view of a fingerprint recognition unit according to another embodiment of this disclosure;

[0034] Figure 8 This is a cross-sectional view of a fingerprint recognition unit according to yet another embodiment of this disclosure;

[0035] Figure 9 This is a schematic diagram of the structure of a display component according to an embodiment of the present disclosure;

[0036] Figure 10 This is a schematic diagram of the membrane structure of a fingerprint recognition module according to another embodiment of the present disclosure;

[0037] Figure 11 This is a schematic diagram of the membrane structure of a fingerprint recognition module according to another embodiment of the present disclosure. Detailed Implementation

[0038] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0039] Please refer to Figure 1 , Figure 2 and Figure 3 This disclosure provides an under-display fingerprint recognition module, including: a substrate 101 and a plurality of fingerprint recognition units disposed on the substrate 101. Each fingerprint recognition unit includes a photosensitive unit S and an optical structure disposed on one side of the photosensitive surface of the photosensitive unit S. The optical structure includes a light-transmitting ring H and a light-transmitting hole K. The light-transmitting ring H and the light-transmitting hole K are sequentially arranged in a direction away from the photosensitive unit S. The light-transmitting ring H is formed on a first light-shielding layer 113, and the light-transmitting hole K is formed on a second light-shielding layer 116. The orthographic projection of the light-transmitting ring H on the photosensitive unit S is at least partially located on the photosensitive surface of the photosensitive unit S, and the orthographic projection of the light-transmitting hole K on the light-transmitting ring H is located within the opaque area surrounded by the light-transmitting ring H. Optionally, the orthographic projection of the light-transmitting ring H on the photosensitive unit S is completely located on the photosensitive surface of the photosensitive unit S.

[0040] In this embodiment, an optical structure including a light-transmitting ring and a light-transmitting hole is provided on one side of the photosensitive surface of the photosensitive unit to guide the signal light with a larger angle (the angle formed with the reference perpendicular to the substrate) for fingerprint recognition through the light-transmitting hole and the light-transmitting ring into the photosensitive surface of the photosensitive unit. This allows ambient light with a smaller angle to pass through the light-transmitting hole and be blocked by the opaque area surrounded by the light-transmitting ring, thereby avoiding interference from ambient light to the photosensitive unit and improving the accuracy of fingerprint recognition.

[0041] In this embodiment of the present disclosure, optionally, the angle formed by the line connecting any point within the light-transmitting hole K and any point on the light-transmitting ring H with the reference line is within a preset angle range, and the reference line is perpendicular to the substrate. Please refer to... Figure 4AThe angle B formed by the line L1 connecting a point on the edge of the light-transmitting aperture K to a point on the outer ring of the light-transmitting ring H on the same side and the reference line, and the angle A formed by the line L2 connecting a point on the edge of the light-transmitting aperture K to a point on the inner ring of the light-transmitting ring H on the same side and the reference line, are both within a preset angle range. In other words, the optical structure can guide light within the preset angle range through the light-transmitting aperture and the light-transmitting rings into the photosensitive surface of the photosensitive unit, so that light outside the preset angle range is blocked by the opaque area surrounded by the light-transmitting ring H after passing through the light-transmitting aperture.

[0042] In this embodiment of the disclosure, optionally, the preset angle range is 40°-75°. More optionally, the preset angle range is 42°-70°. Generally, the angle of the signal light after total internal reflection of the fingerprint is between 40° and 75°, while the angle of ambient light is generally smaller, for example, less than 40°. After passing through the light-transmitting hole K, it is blocked by the opaque area surrounded by the light-transmitting ring H, thereby reducing the interference of small-angle ambient light on fingerprint recognition without affecting the passage of the signal light.

[0043] In this embodiment of the disclosure, optional details may be found, please refer to... Figure 4B The light-transmitting ring and the light-transmitting hole satisfy at least one of the following conditions:

[0044] The diameter w1 of the light-transmitting hole K is 2 to 20 μm;

[0045] The diameter w2 of the inner ring of the light-transmitting ring H is 5-50 μm;

[0046] The diameter w3 of the outer ring of the light-transmitting ring H is 12-300 μm;

[0047] The distance h between the light-transmitting ring H and the light-transmitting hole K is 2 to 50 μm.

[0048] Further optionally, the light-transmitting ring and the light-transmitting hole satisfy the following:

[0049]

[0050]

[0051] Where A is the upper limit of the preset angle range, for example, 70°, and B is the lower limit of the preset angle range, for example, 42°.

[0052] Where B is the critical total internal reflection angle, which is determined by the different film layers used in the device, and A is the maximum angle that the photosensitive unit can detect, which is determined according to the detection capability of the photosensitive unit.

[0053] In this embodiment of the disclosure, optional details may be found, please refer to... Figure 1The photosensitive unit S includes a first electrode 107, a photosensitive layer 108, and a second electrode 109, which are sequentially arranged in a direction away from the substrate 101. The first electrode 107 is an opaque electrode, such as a metal material, while the second electrode 109 is a transparent electrode, such as indium tin oxide (ITO), allowing light to pass through and be received by the photosensitive layer 108. The photosensitive unit S can be a PIN diode or other types of photosensitive devices.

[0054] Please refer to Figure 1 In this embodiment of the present disclosure, each fingerprint recognition unit may include a thin-film transistor T in addition to a photosensitive unit and an optical structure. The thin-film transistor T is used to drive the photosensitive unit. The thin-film transistor T includes a gate 102, a gate insulating layer 103, an active layer 104, a source 1052, and a drain 1051, wherein the source 1052 is connected to the first electrode 107 of the photosensitive unit S. Figure 2 In the illustrated embodiment, the thin-film transistor T has a bottom-gate structure. In other embodiments of this disclosure, the thin-film transistor T may also have a top-gate structure, and this disclosure does not limit the application of this technology. In the embodiments of this disclosure, the active layer 104 may be an amorphous silicon (a-Si) active layer, an oxide active layer, or a low-temperature polycrystalline silicon (LTPS) active layer, and this disclosure does not limit the application of this technology.

[0055] Optionally, the under-display fingerprint recognition module further includes: an insulating layer and a signal line 1131 disposed on the side of the second electrode 109 away from the substrate 101. The signal line is connected to the second electrode 109 through a via on the first insulating layer. The signal line layer 113 can be made of an opaque conductive material such as metal, for example, molybdenum. The signal line is a bias voltage line. Optionally, the signal line 1131 is disposed in the same layer and with the same material as the first light-shielding layer 113, thereby eliminating the need for a separate first light-shielding layer, reducing the number of masks and manufacturing costs, and also reducing the thickness of the fingerprint recognition module. In this embodiment, the first insulating layer can be one layer or multiple layers. Figure 3 In the embodiment shown, the first insulating layer includes a second passivation layer 110, a resin layer 111, and a third passivation layer 112.

[0056] It should be noted that in the above embodiments, the method of changing the signal line layer was adopted in order not to increase the mask and process complexity. In fact, in order to realize the light-transmitting ring, additional conductive or insulating film layers can also be introduced, as long as they are opaque or absorbent, they can be used to form the light-transmitting ring.

[0057] In some embodiments of this disclosure, optionally, the under-display fingerprint recognition module further includes: a light-transmitting shielding layer 115 disposed on the side of the photosensitive unit S away from the substrate 101, and a second light-shielding layer 116 disposed on the side of the light-transmitting shielding layer 115 away from the substrate 101.

[0058] In this embodiment of the disclosure, the second light-shielding layer 116 can be made of a conductive material or an insulating material.

[0059] In this embodiment of the present disclosure, optionally, the second light-shielding layer 116 is made of conductive material and is stacked adjacent to the light-transmitting shielding layer 115 to form a composite shielding layer, which can further improve the shielding effect while forming the light-transmitting hole K.

[0060] In this embodiment of the present disclosure, optionally, an insulating protective layer (not shown) may be provided on the side of the second light-shielding layer 116 away from the light-transmitting shielding layer 115. The insulating protective layer may be, for example, made of silicon nitride, silicon oxide or organic adhesive.

[0061] In addition to being stacked adjacent to the light-transmitting shielding layer 115, the second light-shielding layer 116 can also be referred to... Figure 5 A second insulating layer 117 can also be added between the two to adjust the spacing between the light-transmitting hole K and the light-transmitting ring H as needed. The second insulating layer can be made of inorganic or organic materials.

[0062] In this embodiment, not only can ambient light interference be avoided, but the optical structure can also be implemented inside the fingerprint recognition module. This reduces the need for collimation structures between the display substrate and the fingerprint recognition module in related technologies, and reduces the number of optical adhesive layers during bonding of the display substrate and the fingerprint recognition module, thus lowering the module thickness. In some embodiments of this disclosure, the optical components can be implemented without changing the film layer structure inside the fingerprint recognition module. Instead, the optical components can be directly fabricated on the side of the fingerprint recognition module furthest from the substrate 101, i.e., on the outermost side of the fingerprint recognition module, thereby simplifying the manufacturing process. Please refer to... Figure 10 , Figure 10 In the optical component, there are: a first light-shielding layer 113, a second light-shielding layer 116, and a third insulating layer 118 disposed between the first light-shielding layer 113 and the second light-shielding layer 116. A light-transmitting ring H is formed on the first light-shielding layer 113, and a light-transmitting hole K is formed on the second light-shielding layer 116.

[0063] Furthermore, in some other embodiments of this disclosure, the optical components may also be separate components, attached to one side of the photosensitive surface of the photosensitive unit using optical adhesive. (See reference...) Figure 11 , Figure 11In this design, the optical component is an independent part, including: a first light-shielding layer 113, a second light-shielding layer 116, and a third insulating layer 118 disposed between the first light-shielding layer 113 and the second light-shielding layer 116. A light-transmitting ring H is formed on the first light-shielding layer 113, and a light-transmitting hole K is formed on the second light-shielding layer 116. The optical component is attached to one side of the photosensitive surface of the photosensitive unit using optical adhesive 119.

[0064] In this embodiment of the disclosure, such as Figure 6 As shown, optionally, the optical structure corresponding to each photosensitive unit S includes a set of light-transmitting rings H and light-transmitting holes K. Of course, in other embodiments of this disclosure, it is not excluded that the optical structure corresponding to each photosensitive unit S may include multiple sets of light-transmitting rings H and light-transmitting holes K; please refer to [reference needed]. Figure 7 , Figure 7 The area enclosed by a dashed box is a set of light-transmitting rings H and light-transmitting holes K.

[0065] In the above embodiments, each group of light-transmitting rings H and light-transmitting holes K includes one light-transmitting ring H and one light-transmitting hole K. In other embodiments of this disclosure, it is also possible that each group of light-transmitting rings H and light-transmitting holes K includes multiple light-transmitting rings H and one light-transmitting hole K, with the multiple light-transmitting rings H arranged sequentially from the direction closest to the photosensitive unit S to the direction furthest from the photosensitive unit S. Please refer to [reference needed]. Figure 8 Optionally, from the direction closer to the photosensitive unit S to the direction farther away from the photosensitive unit S, the size of the light-transmitting area surrounded by multiple light-transmitting elements in the same group gradually decreases, thereby making the control of the angle of the transmitted light more precise.

[0066] The following example illustrates the membrane structure of a fingerprint recognition module.

[0067] Please refer to Figure 1 The fingerprint recognition module in this embodiment includes:

[0068] Substrate 101; Substrate 101 can be a flexible substrate or a rigid substrate;

[0069] A gate metal layer is disposed on the substrate 101, including a gate 102 and a gate line (not shown in the figure);

[0070] A gate insulating layer 103 is disposed on the gate 102;

[0071] Active layer 104 is disposed on the gate insulating layer 103;

[0072] The source and drain metal layers include a source 1052, a drain 1051, and a data line (not shown in the figure), wherein the gate 102, the gate insulating layer 103, the active layer 104, the source 1052, and the drain 1051 constitute a thin film transistor T.

[0073] A first passivation layer 106 is disposed on the source / drain metal layer;

[0074] The first electrode 107 is disposed on the first passivation layer 106 and connected to the source electrode 1052 through a via on the first passivation layer 106. The first electrode 107 is an opaque electrode.

[0075] A photosensitive layer 108 is disposed on the first electrode 107;

[0076] The second electrode 109 is disposed on the photosensitive layer 108 and is a light-transmitting electrode; wherein, the first electrode 107, the photosensitive layer 108, and the second electrode 109 form a photosensitive unit S;

[0077] The second passivation layer 109 covers the upper surface and side surface of the second electrode 109 and the side surface of the photosensitive layer 108 to protect the photosensitive layer 108 from being affected by subsequent processes.

[0078] Resin layer 111 is used to achieve a leveling effect;

[0079] A third passivation layer 112 is disposed on the resin layer 111;

[0080] The signal line 1131 and the first light-shielding layer 113 are made of the same material and layer. The first light-shielding layer 113 has a light-transmitting ring H. The signal line 1131 is connected to the second electrode 109 through a through hole that passes through the third passivation layer 112, the resin layer 111 and the second passivation layer 109. The orthogonal projection of the light-transmitting ring H on the photosensitive unit S is located on the photosensitive surface of the photosensitive unit S.

[0081] Buffer layer 114;

[0082] Light-transmitting shielding layer 115;

[0083] The second light-shielding layer 116 has a light-transmitting hole K. The orthographic projection of the light-transmitting hole K onto the light-transmitting ring H is located within the opaque area enclosed by the light-transmitting ring H. The angle between the line connecting any point in the light-transmitting hole K and any point on the light-transmitting ring H and the reference line is within a preset angle range. The light-transmitting hole K and the light-transmitting ring H form an optical structure to guide the signal light with a larger angle for fingerprint recognition through the light-transmitting hole K and the light-transmitting ring H into the photosensitive surface of the photosensitive unit S. This allows ambient light with a smaller angle to be blocked by the opaque area enclosed by the light-transmitting ring H after passing through the light-transmitting hole K, thereby avoiding interference from ambient light to the photosensitive unit S and improving the accuracy of fingerprint recognition.

[0084] Figure 5 The membrane structure of the fingerprint recognition module in the illustrated embodiment is similar to... Figure 1The fingerprint recognition modules shown have similar film structures, but the difference is that a second insulating layer 117 is provided between the light-transmitting shielding layer 115 and the second light-shielding layer 116.

[0085] Please refer to Figure 9 This disclosure also provides a display component, including a display substrate 20 and a fingerprint recognition module 10. The fingerprint recognition module 10 is the fingerprint recognition module in any of the above embodiments. The display substrate 20 includes a plurality of light-emitting units and is disposed on the side of the fingerprint recognition module away from the substrate.

[0086] In this embodiment of the present disclosure, the light-emitting unit in the display substrate 20 can provide a point light source for the fingerprint recognition module. Optionally, if a click is detected at a certain location on the display substrate 20, the point light source in that location can be illuminated to provide a light source for the fingerprint recognition unit in that location for fingerprint detection.

[0087] Optionally, the display substrate is an OLED display substrate.

[0088] Alternatively, the OLED display substrate can be a flexible display substrate or a rigid display substrate.

[0089] In this embodiment, the display substrate and the fingerprint recognition module are bonded together. Optionally, they can be bonded together using optical adhesive.

[0090] In other embodiments of this disclosure, the display substrate and the fingerprint recognition module may also be combined in other ways, such as by providing an air cavity between them, to improve the drop resistance of the display component.

[0091] This disclosure also provides a display device including the above-described display components.

[0092] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. An under-display fingerprint recognition module, characterized in that, include: Substrate; Multiple fingerprint recognition units are disposed on the substrate. Each fingerprint recognition unit includes a photosensitive unit and an optical structure disposed on one side of the photosensitive surface of the photosensitive unit. The optical structure includes a light-transmitting ring and a light-transmitting hole. The light-transmitting ring and the light-transmitting hole are arranged sequentially in a direction away from the photosensitive unit. The light-transmitting ring is formed on a first light-shielding layer, and the light-transmitting hole is formed on a second light-shielding layer. The orthographic projection of the light-transmitting ring on the photosensitive unit is at least partially located on the photosensitive surface of the photosensitive unit, and the orthographic projection of the light-transmitting hole on the light-transmitting ring is located in the opaque area surrounded by the light-transmitting ring. The light-transmitting ring and the light-transmitting hole satisfy at least one of the following conditions: The diameter of the light-transmitting hole is 2–20 μm; The diameter of the outer ring of the light-transmitting ring is 12–300 μm; The diameter of the inner ring of the light-transmitting ring is 5–50 μm; The distance between the light-transmitting ring and the light-transmitting hole is 2 to 50 μm.

2. The under-display fingerprint recognition module as described in claim 1, characterized in that, The angle formed by the line connecting any point in the light-transmitting hole and any point on the light-transmitting ring with the reference line is within a preset angle range, and the reference line is perpendicular to the substrate.

3. The under-display fingerprint recognition module as described in claim 2, characterized in that, The preset angle range is 40°-75°.

4. The under-display fingerprint recognition module as described in claim 1, characterized in that, The photosensitive unit includes a first electrode, a photosensitive layer, and a second electrode, which are arranged sequentially in a direction away from the substrate. The second electrode is a light-transmitting electrode. The under-display fingerprint recognition module further includes a first insulating layer and a signal line disposed on the side of the second electrode away from the substrate. The signal line is connected to the second electrode through a via on the first insulating layer. The first light-shielding layer is made of the same material as the signal line.

5. The under-display fingerprint recognition module as described in claim 1, characterized in that, Also includes: A light-transmitting shielding layer is disposed on the side of the photosensitive unit away from the substrate, and a second light-shielding layer is disposed on the side of the light-transmitting shielding layer away from the substrate.

6. The under-display fingerprint recognition module as described in claim 5, characterized in that, The second light-shielding layer is made of conductive material and is stacked adjacent to the light-transmitting shielding layer.

7. The under-display fingerprint recognition module as described in claim 5, characterized in that, Also includes: The second insulating layer is disposed between the second light-shielding layer and the light-transmitting shielding layer.

8. The under-display fingerprint recognition module as described in claim 1, characterized in that, The optical structure is an independent component, which is attached to one side of the photosensitive surface of the photosensitive unit by optical adhesive, or the optical structure is located on the side of the under-display fingerprint recognition module furthest from the substrate.

9. The under-display fingerprint recognition module as described in claim 1, characterized in that, Each of the optical structures includes at least one set of the light-transmitting rings and light-transmitting holes.

10. The under-display fingerprint recognition module as described in claim 1, characterized in that, Each set of light-transmitting rings and light-transmitting holes includes at least one light-transmitting ring and one light-transmitting hole, wherein the at least one light-transmitting ring is arranged sequentially from the direction closest to the photosensitive unit to the direction furthest from the photosensitive unit.

11. A display component, characterized in that, The device includes a display substrate and a fingerprint recognition module as described in any one of claims 1 to 10, wherein the display substrate includes a plurality of light-emitting units and is disposed on the side of the fingerprint recognition module away from the substrate.

12. The display component as claimed in claim 11, characterized in that, The display substrate is bonded to the fingerprint recognition module.

13. A display device, characterized in that, Includes the display component as described in any one of claims 11 or 12.

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