Screen assembly and electronic device

Abstract

Embodiments of the present application disclose a screen assembly, comprising a display panel and an identification panel located on a non-light-emitting side of the display panel, the display panel comprising a plurality of identification areas, a non-identification area being formed between two adjacent and spaced apart identification areas, the identification panel comprising a plurality of image sensors, light-sensitive surfaces of the plurality of image sensors being configured to correspondingly collect user fingerprint images located in the plurality of identification areas; in a fingerprint coverage area, a ratio of a total area of all the identification areas to a total area of all the non-identification areas is greater than or equal to 1:5. The screen assembly can realize large-area fingerprint identification at a relatively low cost. Embodiments of the present application also disclose an electronic device.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and in particular to a screen assembly and an electronic device. Background Technology

[0002] Current smartphones typically incorporate image sensors for fingerprint recognition. The cost of an image sensor is related to its photosensitive surface area; the larger the area, the higher the cost, resulting in the high cost of smartphones with large-screen fingerprint recognition capabilities. Summary of the Invention

[0003] This application provides a screen assembly and electronic device to achieve large-area fingerprint recognition at a low cost.

[0004] In a first aspect, embodiments of this application provide a screen assembly. The screen assembly can be applied to an electronic device. The screen assembly includes a display panel and an identification panel located on the non-light-emitting side of the display panel. The identification panel is stacked on top of the display panel. The display panel is used to display images. The two sides of the display panel are respectively a light-emitting side and a non-light-emitting side, wherein the light-emitting side is the side of the display panel that emits display light.

[0005] The display panel includes multiple recognition areas. A non-recognition area is formed between two adjacent and spaced-apart recognition areas. The recognition panel includes multiple image sensors. The photosensitive surfaces of the multiple image sensors are used to acquire user fingerprint images located in the multiple recognition areas in a one-to-one correspondence. The photosensitive surfaces of the image sensors can convert the light image formed thereon into an electrical signal proportional to the light image. In the fingerprint coverage area, the ratio of the total area of ​​all recognition areas to the total area of ​​all non-recognition areas is greater than or equal to 1:5.

[0006] In this embodiment, the recognition panel including the plurality of image sensors is located on the non-light-emitting side of the display panel. Therefore, the plurality of image sensors can perform under-display fingerprint image acquisition. The plurality of image sensors do not need to occupy the surrounding space of the display panel, thereby increasing the area of ​​the display panel. This is beneficial for narrowing the bezel of the screen assembly, resulting in a larger screen-to-body ratio of the screen assembly and the electronic device using the screen assembly.

[0007] In this embodiment, since the photosensitive surfaces of the plurality of image sensors acquire a portion of the user's fingerprint image located on the light-emitting side of the plurality of recognition areas, but do not acquire a portion of the fingerprint image located on the light-emitting side of the non-recognition areas, the photosensitive surfaces of the plurality of image sensors acquire the user's fingerprint image located on the light-emitting side of the display panel locally, rather than acquiring all of it. This reduces the total area of ​​the photosensitive surfaces of the plurality of image sensors, thereby reducing the cost of the recognition panel and the screen assembly.

[0008] Furthermore, since the ratio of the total area of ​​all recognition areas to the total area of ​​all non-recognition areas in the fingerprint coverage area is greater than or equal to 1:5, the total area of ​​the local fingerprint images (i.e., the effective acquisition area) acquired by the photosensitive surfaces of the multiple image sensors can meet the minimum acquisition area required for the fingerprint recognition process. This allows the screen assembly to meet basic recognition requirements while reducing the total area of ​​the photosensitive surfaces of the multiple image sensors, thereby reducing the cost of the multiple image sensors and the screen assembly. Because the screen assembly meets recognition requirements and has a low cost, it can achieve large-area fingerprint recognition (full-screen fingerprint recognition or large-screen fingerprint recognition) without significantly increasing costs. In other words, the screen assembly and the electronic devices using the screen assembly can achieve large-area fingerprint recognition at a low cost.

[0009] In one alternative embodiment, within the fingerprint coverage area, the ratio of the total area of ​​all the identified areas to the total area of ​​all the non-identified areas is in the range of 1:2 to 2:1. In this application, the range "A" to "B" includes endpoints A and B.

[0010] This application does not strictly limit the upper limit of the ratio of the total area of ​​all recognition areas to the total area of ​​all non-recognition areas within the fingerprint coverage area. A higher ratio results in higher recognition accuracy, while a lower ratio results in lower cost. Experimental verification shows that when the ratio of the total area of ​​all recognition areas to the total area of ​​all non-recognition areas is within the range of 1:2 to 2:1, the screen assembly can effectively balance the requirements of recognition accuracy and cost.

[0011] In one embodiment, the screen assembly enables full-screen fingerprint recognition. In this case, the fingerprint coverage area can be located at any position within the display area of ​​the display panel. That is, the entire display area of ​​the display panel can respond to user operations and form a corresponding fingerprint coverage area. In another embodiment, the screen assembly enables large-screen fingerprint recognition. The fingerprint coverage area can be located within a specified range of the display area of ​​the display panel. For example, a portion of the display area of ​​the display panel is a specified location, and this portion can respond to user operations to form a corresponding fingerprint coverage area. This specified range has a relatively large area. For example, this specified range can be half or more of the upper or lower half of the screen assembly, or half or more of the left or right half of the screen assembly, etc.

[0012] Optionally, the fingerprint coverage area responds to user operation. That is, the position of the fingerprint coverage area is user-defined. In one embodiment, the screen component can sense the user's touch area, which forms the fingerprint coverage area. In this case, the shape of the fingerprint coverage area changes with the shape of the user's touch area.

[0013] In another embodiment, the screen component can sense the user's touch position and activate a preset fingerprint coverage area corresponding to that touch position, the fingerprint coverage area covering the touch position. In this case, the shape of the fingerprint coverage area can be circular, elliptical, square, or racetrack-shaped, etc. The shape of the fingerprint coverage area can also be similar to or the same as the shape of the user's finger. The shape of the fingerprint coverage area can also be customized by the user. This application does not strictly limit the specific shape of the fingerprint coverage area.

[0014] The area of ​​the fingerprint coverage region ranges from 35 square millimeters to 200 square millimeters. For example, the area of ​​the fingerprint coverage region can range from 64 square millimeters to 144 square millimeters.

[0015] In this embodiment, the fingerprint coverage area includes at least two recognition areas. At this time, the area of ​​each recognition area is relatively small. Images acquired by the photosensitive surfaces of the image sensors corresponding to the at least two recognition areas are stitched together to form the final comparison image. Since the comparison image is composed of multiple images, it is more accurate, which helps improve the fingerprint recognition accuracy of the electronic device using the screen assembly.

[0016] Understandably, given that the fingerprint coverage area meets the basic acquisition area requirement, the smaller the area of ​​each recognition region, the more images are stitched together for the comparison image, resulting in higher image quality and fingerprint recognition accuracy. However, a larger number of image sensors also leads to higher costs. Conversely, while a larger area of ​​each recognition region can reduce the number of image sensors and lower costs, it reduces the number of stitched images included in the comparison image, resulting in lower image quality and fingerprint recognition accuracy. Therefore, the embodiments of this application need to balance recognition accuracy and cost requirements when designing the area of ​​a single recognition region.

[0017] Each of the image sensors comprises an array of multiple sensing units on its photosensitive surface. These sensing units can be complementary metal-oxide-semiconductor (CMOS) sensors or thin-film transistor (TFT) sensors. When a CMOS sensor is used, the substrate of the image sensor is made of a semiconductor material. When a TFT sensor is used, the substrate of the image sensor is made of an insulating material such as glass or an organic dielectric.

[0018] In the embodiments of this application, the shape and area of ​​each identification region may be the same or different. This application uses the example of all identification regions having the same shape and area for illustration.

[0019] In this embodiment, when the ratio of the area of ​​the identification region to the area of ​​the non-identification region satisfies the above condition, the arrangement of the plurality of identification regions can be either regular or random. This embodiment illustrates the example where the arrangement of the plurality of identification regions can be regular.

[0020] In one optional embodiment, the plurality of identification regions are arranged at intervals in a first direction. That is, in the first direction, non-identification regions are arranged between any two adjacent identification regions. In this case, the distance between any two adjacent identification regions in the first direction has a first dimension, and the length of each identification region has a second dimension. The first dimension can be greater than, equal to, or less than the second dimension; this embodiment does not strictly limit the dimensional relationship between the two.

[0021] In this embodiment, since the multiple recognition areas are arranged at intervals in the first direction, when the two fingerprint coverage areas are located at different positions on the display panel, the number of photosensitive surfaces of the image sensors corresponding to the two fingerprint coverage areas is the same or similar, thereby ensuring that the screen assembly can obtain sufficient effective collection area in different usage scenarios, so that the fingerprint recognition accuracy of the electronic device is high.

[0022] In one optional embodiment, the plurality of identification regions are arranged at intervals in a second direction, which is perpendicular to the first direction. That is, in the second direction, a non-identification region is arranged between any two adjacent identification regions. In this case, the distance between any two adjacent identification regions in the second direction has a third dimension, and the length of each identification region has a fourth dimension. The third dimension can be greater than, equal to, or less than the fourth dimension; this embodiment does not strictly limit the dimensional relationship between the two.

[0023] In this embodiment, when the multiple recognition areas are arranged at intervals in both the first and second directions, the number of photosensitive surfaces of the image sensors corresponding to the two fingerprint coverage areas located at different positions on the display panel is the same or more similar, further ensuring that the screen assembly can obtain sufficient effective collection area in different usage scenarios, thereby making the fingerprint recognition accuracy of the electronic device higher.

[0024] In this embodiment, the arrangement of the plurality of recognition areas in the first direction is the same as that in the second direction. In this case, the screen assembly has higher reliability in obtaining sufficient effective collection area under different usage scenarios, and the fingerprint recognition accuracy of the electronic device is higher. Of course, in other embodiments, the arrangement of the plurality of recognition areas in the first direction and the arrangement in the second direction may not be the same.

[0025] In one optional embodiment, the plurality of identification regions are arranged in rows spaced apart from each other in a first direction and in columns spaced apart from each other in a second direction, the second direction being perpendicular to the first direction. Each identification region in two adjacent rows is arranged in a different column. Similarly, each identification region in two adjacent columns is arranged in a different column.

[0026] In this embodiment, the number of recognition areas included in any two fingerprint coverage areas with different positions of the screen component is very similar, that is, the number of photosensitive surfaces of the image sensor corresponding to these two fingerprint coverage areas is very similar. The screen component can obtain sufficient effective collection area in different usage scenarios, so that the fingerprint recognition accuracy of the electronic device is higher.

[0027] In one optional embodiment, within the fingerprint coverage area, the ratio of the total area of ​​all the identified areas to the total area of ​​all the non-identified areas is in the range of 1:0.8 to 1:1.2. In this case, in the first direction, the spacing between two adjacent identified areas can be equal to, slightly greater than, or slightly less than the length of the identified area. In the second direction, the spacing between two adjacent identified areas can also be equal to, slightly greater than, or slightly less than the length of the identified area.

[0028] In this embodiment, the screen assembly can comprehensively consider the requirements of manufacturing tolerances, assembly tolerances, total image acquisition area, cost, and other aspects to achieve higher product yield, fingerprint recognition accuracy, and lower cost.

[0029] In one optional embodiment, the plurality of identification regions includes a plurality of identification region groups. Each identification region group includes at least two identification regions that are adjacent to each other. Any two adjacent identification region groups are spaced apart from each other. Wherein, at least two identification regions are adjacent to each other means that the distance between two adjacent identification regions within the same identification region group is much smaller than the distance between two adjacent identification region groups. A non-identification region is formed between any two adjacent identification region groups. The plurality of identification region groups are spaced apart from each other in a first direction, and spaced apart or continuously arranged in a second direction, the second direction being perpendicular to the first direction.

[0030] In this embodiment, since each group of recognition regions includes at least two adjacent recognition regions, and any two adjacent groups of recognition regions are spaced apart, the arrangement of the recognition regions is more diverse, which is beneficial for meeting the fingerprint recognition needs of different electronic devices. The inclusion of at least two recognition regions in each group also allows the recognition regions to capture continuous images within a small area, resulting in the final comparison image formed by the screen assembly being composed of at least two continuous images. This final comparison image is easier to compare with the standard image in the electronic device, leading to higher fingerprint recognition accuracy.

[0031] The fingerprint coverage area includes at least two sets of recognition areas. The final comparison image formed by the screen assembly is stitched together from images acquired by at least two sets of recognition areas, resulting in high image quality and thus high fingerprint recognition accuracy for the electronic device using the screen assembly.

[0032] In one alternative embodiment, a single image sensor includes a photosensitive surface. In this case, the overall volume of the image sensor varies with the area of ​​its photosensitive surface; a smaller photosensitive surface area results in a smaller overall volume of the image sensor, which helps reduce the cost of the image sensor.

[0033] In another alternative embodiment, a single image sensor includes multiple photosensitive surfaces. When the area of ​​a single photosensitive surface is very small, multiple photosensitive surfaces can be integrated into the same image sensor to reduce the difficulty of the image sensor's cutting process, thereby balancing the requirements of small size and ease of manufacturing of the image sensor.

[0034] The multiple photosensitive surfaces of the same image sensor can be arranged at intervals or adjacent to each other.

[0035] In one optional embodiment, the recognition panel further includes a substrate and an optical layer. The substrate is located on the non-light-emitting side of the display panel. The plurality of image sensors are fixed to the side of the substrate facing the display panel. The photosensitive surface of each image sensor is disposed away from the substrate, i.e., facing the display panel. The optical layer is located between the plurality of image sensors and the display panel. The optical layer is used to image the user's fingerprint image located on the light-emitting side of the recognition area onto the photosensitive surface of the corresponding image sensor. The screen assembly processes the light reflected by the user's fingerprint through the optical layer to form a corresponding acquired image on the photosensitive surface of the corresponding image sensor, which corresponds to the user's fingerprint image.

[0036] In this embodiment, since the screen assembly is provided with the optical layer, which can change the state of light, the relative positional relationship between the photosensitive surface of the image sensor and the display panel can be changed by setting the structure and size of the optical layer, making the structure of the screen assembly more diverse and its application range wider.

[0037] In one embodiment, the photosensitive surfaces of the plurality of image sensors can be aligned one-to-one with the plurality of recognition areas. In this case, the optical layer causes minimal alteration to the propagation direction of light, reducing the risk of light distortion during propagation leading to insufficient accuracy in the final comparison image, thus resulting in higher fingerprint recognition accuracy of the electronic device using the screen assembly.

[0038] In other embodiments, the optical layer can change the direction of light propagation, so the relative positional relationship between the photosensitive surfaces of the plurality of image sensors can be slightly different from the relative positional relationship of the plurality of recognition areas.

[0039] For example, a single image sensor includes multiple photosensitive surfaces adjacent to each other. Multiple recognition areas corresponding to the multiple photosensitive surfaces are spaced apart from each other. By changing the direction of light propagation through an optical layer, light entering from these recognition areas converges and enters the multiple adjacent photosensitive surfaces, thereby achieving image acquisition.

[0040] In one embodiment, the substrate may be a rigid printed circuit board (PCB). In another embodiment, the substrate may include a flexible printed circuit board (FPC) and a reinforcing plate, wherein the reinforcing plate is stacked with the flexible printed circuit board.

[0041] In one embodiment, the plurality of image sensors can be directly bonded to the substrate using a die attach method. In another embodiment, the plurality of image sensors can be connected into a single package structure using a fan-out process, and then the package structure is bonded to the substrate as a whole.

[0042] In one alternative embodiment, the recognition panel further includes a package. The package is located on the side of the substrate facing the display panel and is disposed around the plurality of image sensors. In this case, the package encapsulates the plurality of image sensors into a single package structure. The package may employ a fan-out process to encapsulate the plurality of image sensors. The optical layer covers the package and the plurality of image sensors. In this case, the optical layer may be a single, integrated structure.

[0043] In this embodiment, the package can first encapsulate the multiple image sensors into a single package structure, then attach the package structure to the substrate, and then cover the package and the multiple image sensors with the optical layer, which is also a single structure. Therefore, the assembly process of the screen assembly has fewer steps and lower process difficulty, which helps to reduce the production cost of the screen assembly.

[0044] In one optional embodiment, the optical layer includes a plurality of optical elements. Each of the plurality of optical elements is located on one of the plurality of image sensors. The optical elements are positioned on one side of the image acquired by the corresponding image sensor, that is, above the photosensitive surface of the image sensor. The recognition panel further includes a plurality of encapsulation bodies. Each of the plurality of encapsulation bodies is disposed in a one-to-one correspondence with the plurality of optical elements. Each encapsulation body is used to encapsulate the corresponding optical element and the image sensor into a single unit component.

[0045] The recognition panel further includes a package. The package is located on the side of the substrate facing the display panel and is disposed around the plurality of image sensors and the plurality of optical components. In one embodiment, the image sensors and the optical components located above them can be first formed into unit components. After the plurality of unit components are fixed to the substrate, the package is used to encapsulate the plurality of unit components and the substrate into a single structure. In another embodiment, the image sensors and the optical components located above them can be first formed into unit components. After the plurality of unit components are encapsulated into a single structure by the package, the structure is then attached to the substrate to complete the assembly.

[0046] In this embodiment, since the corresponding optical part and the image sensor can form a unit component, and then multiple unit components are fixed to the substrate according to specific arrangement requirements, the screen assembly can form different recognition panels by changing the position of the unit components without changing the material type, which is beneficial to the mass production and multi-model production of the screen assembly.

[0047] In one alternative embodiment, the optical layer includes a plurality of collimators. The collimators are used to convert diverging light into collimated light. The plurality of collimators are positioned one-to-one with the photosensitive surfaces of the plurality of image sensors.

[0048] In this embodiment, the multiple collimators image a 1:1 scale image on the photosensitive surface of the image sensor. Because the multiple collimators can collimate the light reflected from the user's fingerprint, the image quality of the acquired image is high, and the screen assembly can form a high-quality comparison image, thereby resulting in high fingerprint recognition accuracy of the electronic device.

[0049] Since the collimator is used to image a 1:1 scale image, the area of ​​the photosensitive surface of the image sensor is similar to the area of ​​the recognition area on the display panel. Considering the tolerances during assembly of the multiple image sensors, reasonable clearance can be provided between two image sensors that are close to each other to improve the assembly accuracy and product yield of the screen assembly.

[0050] When the corresponding image sensor and the optical component are first formed into unit components and then packaged by the packaging component: each collimator can be directly formed on the photosensitive surface of the image sensor using a wafer-level processing technology. For example, a collimation hole structure can be deposited or etched on the photosensitive surface of the image sensor using a multilayer mask process to form the collimator. Alternatively, each collimator can be a thin film with collimation holes formed first, and then each collimator can be attached to the photosensitive surface of the corresponding image sensor.

[0051] When the package first encapsulates the plurality of image sensors and then assembles the optical layer, the optical layer can be an integrated structure including multiple collimators.

[0052] In one optional embodiment, the optical layer includes a plurality of light-transmitting holes. The optical layer may include a substrate and a light-shielding film, the light-shielding film being located on the side of the substrate facing the display panel. The substrate is made of a light-transmitting material, such as glass or polycarbonate (PC). The light-shielding film has the plurality of light-transmitting holes. The light-shielding film is made of a light-shielding material. The plurality of light-transmitting holes are arranged one-to-one with the photosensitive surfaces of the plurality of image sensors. A first distance is formed between the center of each light-transmitting hole and the light-emitting surface of the display panel, and a second distance is formed between each hole and the photosensitive surface of the image sensor, the first distance being greater than the second distance.

[0053] In this embodiment, utilizing the pinhole imaging principle, the multiple light-transmitting pinholes image a captured image with an object-image ratio of X:1 on the photosensitive surface of the image sensor. X is greater than 1. At this time, the area of ​​the captured image is smaller than the area of ​​the recognition area on the display panel. Therefore, while keeping the area of ​​the recognition area constant, the area of ​​the photosensitive surface of the image sensor can be reduced, thus lowering the cost of the image sensor and the screen assembly. Simultaneously, while keeping the area of ​​the photosensitive surface of the image sensor constant, the area of ​​the recognition area corresponding to the image sensor increases. Redundant stitching can be used to connect multiple recognition areas, thereby improving the fingerprint recognition accuracy of the electronic device.

[0054] The screen assembly can reduce the area of ​​the photosensitive surface of the image sensor or increase the area of ​​the recognition region corresponding to the photosensitive surface of the image sensor by adjusting the dimensions of the first spacing and the second spacing.

[0055] In this configuration, the light-emitting surface of the display panel is the surface of the display panel furthest from the recognition panel. The non-light-emitting surface of the display panel is positioned opposite to the light-emitting surface. A gap is formed between the non-light-emitting surface of the display panel and the center of the light-transmitting aperture. The size of the first gap can be adjusted by adjusting the size of this gap.

[0056] The substrate of the optical layer has a thickness (the dimension in the direction perpendicular to the photosensitive surface of the image sensor). The size of the second spacing can be adjusted by adjusting the thickness of the substrate.

[0057] In one alternative embodiment, the screen assembly further includes a transparent adhesive layer bonded between the display panel and the optical layer. In this embodiment, the adhesive layer fills the space between the display panel and the optical layer. The adhesive layer can bond the optical layer and the display panel, and also prevent light scattering due to the air layer from affecting the quality of the acquired image. The adhesive layer may be made of transparent optical adhesive. In one embodiment, the adhesive layer may also simultaneously cover the encapsulation.

[0058] In one alternative embodiment, the optical layer includes a plurality of lenses. Each of the plurality of lenses is positioned correspondingly to the photosensitive surface of the plurality of image sensors. The lenses are used to image and reduce the user's fingerprint image to the photosensitive surface of the image sensor. The lenses also function as light-focusing elements.

[0059] In this embodiment, the lens is used to image and reduce the user's fingerprint image to the photosensitive surface of the image sensor. The area ratio of the acquired image formed on the photosensitive surface of the image sensor to the corresponding recognition area is less than 1, that is, the object-image ratio is greater than 1. At this time, the area of ​​the acquired image is smaller than the area of ​​the recognition area on the display panel. Therefore, while the area of ​​the recognition area remains unchanged, the area of ​​the photosensitive surface of the image sensor can be reduced, thereby reducing the cost of the image sensor and the screen assembly. Simultaneously, while the area of ​​the photosensitive surface of the image sensor remains unchanged, the area of ​​the recognition area corresponding to the photosensitive surface of the image sensor increases. Multiple recognition areas can be redundantly stitched together, thereby improving the fingerprint recognition accuracy of the electronic device.

[0060] A single lens may include one or more sub-lenses. When a single lens includes one sub-lens, the sub-lens is a convex lens. When a single lens includes multiple sub-lenses, the multiple sub-lenses may be multiple convex lenses, or a combination of concave and convex lenses. The lens may also be a planar lens made using a metamaterial structure.

[0061] Secondly, embodiments of this application also provide an electronic device. The electronic device includes a housing and a screen assembly as described in any of the preceding claims. The screen assembly is mounted on the housing.

[0062] In this embodiment, the screen assembly has a larger display area, resulting in a larger screen-to-body ratio for the electronic device. Because the screen assembly can reduce the total photosensitive area of ​​the multiple image sensors while maintaining a sufficiently large effective acquisition area, thereby reducing the cost of the multiple image sensors, the screen assembly is more cost-effective. Therefore, the electronic device can achieve large-area fingerprint recognition at a lower cost without significantly affecting fingerprint recognition performance. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0064] Figure 2 yes Figure 1 A schematic diagram of the screen assembly of the electronic device shown;

[0065] Figure 3 yes Figure 2 The diagram shows the structure of the screen assembly at line AA in one embodiment.

[0066] Figure 4 yes Figure 2 The diagram shows the structure of the screen assembly at line AA in another embodiment.

[0067] Figure 5A yes Figure 2 A partial structural diagram of the display panel of the screen assembly shown in one embodiment;

[0068] Figure 5B yes Figure 5A The diagram shows the identification area and non-identification area of ​​the display panel in one arrangement.

[0069] Figure 5C yes Figure 5A The diagram shows the identification and non-identification areas of the display panel in another arrangement.

[0070] Figure 5D yes Figure 5A The diagram shows the identification area and non-identification area of ​​the display panel in another arrangement.

[0071] Figure 6A yes Figure 2 A partial structural diagram of the display panel of the screen assembly shown in another embodiment;

[0072] Figure 6B yes Figure 2 A partial structural schematic diagram of the display panel of the screen assembly shown in another embodiment;

[0073] Figure 6C yes Figure 2 A partial structural schematic diagram of the display panel of the screen assembly shown in another embodiment;

[0074] Figure 7 yes Figure 3 The diagram shows the structure of the screen assembly in the first embodiment.

[0075] Figure 8A yes Figure 7The diagram shows the structure of the screen assembly in the first embodiment.

[0076] Figure 8B yes Figure 7 The diagram shows the structure of the screen assembly in the second embodiment.

[0077] Figure 8C yes Figure 7 The diagram shows the structure of the screen assembly in the third embodiment;

[0078] Figure 9 yes Figure 3 The diagram shows a structural schematic of the screen assembly in the second embodiment.

[0079] Figure 10A yes Figure 9 The diagram shows the structure of the screen assembly in the first embodiment.

[0080] Figure 10B yes Figure 9 The diagram shows the structure of the screen assembly in the second embodiment.

[0081] Figure 10C yes Figure 9 The diagram shows the structure of the screen assembly in the third embodiment. Detailed Implementation

[0082] The embodiments of this application are described below with reference to the accompanying drawings.

[0083] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 100 provided in an embodiment of this application.

[0084] Electronic device 100 may be a mobile phone, tablet computer, e-reader, laptop computer, in-vehicle device or wearable device, etc. Figure 1 The illustrated embodiment uses a mobile phone as an example of an electronic device 100.

[0085] Electronic device 100 includes a housing 10 and a screen assembly 20. The screen assembly 20 is mounted on the housing 10. Specifically, the housing 10 includes a frame and a back cover. The frame surrounds the periphery of the back cover. The screen assembly 20 is mounted on the side of the frame away from the back cover. That is, the screen assembly 20 and the back cover are respectively mounted on opposite sides of the frame. When a user uses electronic device 100, the screen assembly 20 is typically placed facing the user, and the back cover is placed away from the user. The frame and back cover can be assembled into a single unit. Alternatively, the frame and back cover can be a single molded structure.

[0086] The screen component 20 integrates display, touch sensing, and fingerprint image acquisition functions. The screen component 20 can acquire the user's fingerprint image and generate a corresponding comparison image.

[0087] The electronic device 100 also includes a circuit board 30 and a control module 40 located on the circuit board 30. The circuit board 30 and the control module 40 are housed inside the housing 10. The control module 40 may include at least one communication interface, a bus, at least one processor, and at least one memory. The at least one communication interface, the at least one processor, and the at least one memory can communicate with each other via the bus. The at least one communication interface is used to receive and transmit data. A screen assembly 20 is connected to one of the communication interfaces. The screen assembly 20 is capable of transmitting data of a comparison image corresponding to a user's fingerprint image to the processor. The at least one memory is used to store program code. The program code includes fingerprint recognition code. The at least one processor can be used to execute the above-described application code. For example, the at least one processor is capable of executing fingerprint recognition code to implement fingerprint recognition. In this application, "at least one" includes both one and two cases.

[0088] Please refer to the following: Figure 2 and Figure 3 , Figure 2 yes Figure 1 The schematic diagram of the screen assembly 20 of the electronic device 100 shown is as follows. Figure 3 yes Figure 2 The diagram shows the structure of the screen assembly 20 at line AA in one embodiment.

[0089] The screen assembly 20 includes a display panel 1 and an identification panel 2 located on the non-light-emitting side of the display panel 1. The identification panel 2 is stacked on top of the display panel 1. The display panel 1 is used to display images. The two sides of the display panel 1 are the light-emitting side and the non-light-emitting side, respectively, wherein the light-emitting side is the side of the display panel 1 from which display light is emitted.

[0090] The recognition panel 2 includes multiple image sensors 21. The display panel 1 includes multiple recognition areas 11. A non-recognition area 12 is formed between two adjacent and spaced-apart recognition areas 11. The photosensitive surfaces 211 of the multiple image sensors 21 are used to acquire user fingerprint images located on the light-emitting side of the display panel 1 in a one-to-one correspondence. Specifically, the photosensitive surfaces 211 of the multiple image sensors 21 are used to acquire user fingerprint images located in the multiple recognition areas 11 in a one-to-one correspondence. The image sensors 21 are capable of converting the acquired image (light image) formed on their photosensitive surfaces 211 into an electrical signal that is proportional to the acquired image. In the fingerprint coverage area 3, the ratio of the total area of ​​all recognition areas 11 to the total area of ​​all non-recognition areas 12 is greater than or equal to 1:5.

[0091] In this embodiment, the recognition panel 2, which includes multiple image sensors 21, is located on the non-light-emitting side of the display panel 1. Therefore, the multiple image sensors 21 can perform under-display fingerprint image acquisition. The multiple image sensors 21 do not need to occupy the surrounding space of the display panel 1, so the area of ​​the display panel 1 can be increased, which is conducive to the narrow bezel of the screen assembly 20, resulting in a larger screen ratio of the screen assembly 20 and a larger screen ratio of the electronic device 100 using the screen assembly 20.

[0092] In this embodiment, since the photosensitive surfaces 211 of the multiple image sensors 21 collect partial user fingerprint images located on the light-emitting side of the multiple recognition areas 11 in a one-to-one correspondence, but do not collect partial fingerprint images located on the light-emitting side of the non-recognition area 12, the photosensitive surfaces 211 of the multiple image sensors 21 collect user fingerprint images located on the light-emitting side of the display panel 1 locally, rather than collecting all of them. This reduces the total area of ​​the photosensitive surfaces 211 of the multiple image sensors 21, thereby reducing the cost of the recognition panel 2 and the screen assembly 20.

[0093] Furthermore, since the ratio of the total area of ​​all recognition areas 11 to the total area of ​​all non-recognition areas 12 in the fingerprint coverage area 3 is greater than or equal to 1:5, the total area of ​​the local fingerprint images (i.e., the effective acquisition area) collected by the photosensitive surfaces 211 of the multiple image sensors 21 can meet the minimum acquisition area required for the fingerprint recognition process. This allows the screen assembly 20 to reduce the total area of ​​the photosensitive surfaces 211 of the multiple image sensors 211 while meeting basic recognition requirements, thereby reducing the cost of the multiple image sensors 21 and the production cost of the screen assembly 20. Because the screen assembly 20 can meet the recognition requirements and has a low cost, it can achieve large-area fingerprint recognition (full-screen fingerprint recognition or large-screen fingerprint recognition) without significantly increasing costs. In other words, the screen assembly 20 and the electronic device 100 using the screen assembly 20 can achieve large-area fingerprint recognition at a low cost.

[0094] The fingerprint coverage area 3 includes the area within the region outline. If half or other preset proportions (e.g., all, two-thirds, one-third, three-quarters, one-quarter, one-fifth, etc.) of a certain recognition area 11 are located within the region outline, then that recognition area 11 is the area within the fingerprint coverage area 3. When there are multiple non-recognition areas 12, and they are separated by recognition areas 11 (see below for details). Figure 5B and Figure 5D If half or other preset proportions of the area of ​​a non-identification area 12 are located within the region outline, then the non-identification area 12 is within the fingerprint coverage area 3; when the non-identification area 12 is a single, integrated area (see later text)... Figure 5C Then the part of the non-recognition area 12 that is within the area outline is the area within the fingerprint coverage area 3.

[0095] In one alternative embodiment, within the fingerprint coverage area 3, the ratio of the total area of ​​all recognition areas 11 to the total area of ​​all non-recognition areas 12 is in the range of 1:2 to 2:1. In this application, the range "A" to "B" includes endpoints A and B.

[0096] This application does not strictly limit the upper limit of the ratio of the total area of ​​all recognition areas 11 to the total area of ​​all non-recognition areas 12 in the fingerprint coverage area 3. A higher ratio results in higher recognition accuracy, while a lower ratio results in lower cost. During design, this ratio must balance recognition accuracy and cost. Experimental verification shows that when the ratio of the total area of ​​all recognition areas 11 to the total area of ​​all non-recognition areas 12 in the fingerprint coverage area 3 is within the range of 1:2 to 2:1, the screen assembly 20 can effectively balance the requirements of recognition accuracy and cost.

[0097] In one embodiment, the screen assembly 20 can achieve full-screen fingerprint recognition. In this case, the fingerprint coverage area 3 can be located at any position on the display area of ​​the display panel 1. That is, the entire display area of ​​the display panel 1 can respond to the user's operation and form a corresponding fingerprint coverage area 3. In another embodiment, the screen assembly 20 can achieve large-screen fingerprint recognition. The fingerprint coverage area 3 can be located within a specified range of the display area of ​​the display panel 1. For example, a portion of the display area of ​​the display panel 1 is a specified location, and this portion can respond to the user's operation to form a corresponding fingerprint coverage area 3. The area of ​​this specified range is relatively large. For example, this specified range can be half or more of the upper or lower half of the screen assembly, or half or more of the left or right half of the screen assembly, etc.

[0098] Optionally, the fingerprint coverage area responds to user actions. That is, the location of the fingerprint coverage area is user-defined.

[0099] In one embodiment, the screen assembly can sense a user's touch area, which forms the fingerprint coverage area. In this case, the shape of the fingerprint coverage area changes according to the shape of the user's touch area.

[0100] In another embodiment, the screen component can sense the user's touch position and activate a preset fingerprint coverage area corresponding to that touch position, the fingerprint coverage area covering the touch position. In this case, the shape of the fingerprint coverage area 3 can be circular, elliptical, square, or racetrack-shaped, etc. The shape of the fingerprint coverage area 3 can also be similar to or the same as the shape of the user's fingertip. The shape of the fingerprint coverage area 3 can also be customized by the user. This application embodiment does not strictly limit the specific shape of the fingerprint coverage area 3. Figure 2 The shape of the fingerprint coverage area 3 is circular, which is used as an example for illustration.

[0101] This application also discloses a fingerprint recognition method for an electronic device 100, which can be applied to the electronic device 100 in this application embodiment. The method includes:

[0102] Step 1: The screen component 20 captures the user's touch position and forms touch information. The first touch information includes the position information of the user's finger. For example, ... Figure 2 As shown, when a user touches the first point 311 with their finger, the first touch information includes the position information (i.e., coordinates) of the first point 311. When a user touches the second point 321 with their finger, the second touch information includes the position information (i.e., coordinates) of the second point 321. The touch layer in the screen component 20 can be used to perform the user's touch actions and form touch information.

[0103] Step 2: Based on the touch information, the control module 40 activates the light source of the corresponding fingerprint coverage area 3. The corresponding fingerprint coverage area 3 is an area covered by a preset shape centered on or based on the user's finger position.

[0104] For example, such as Figure 2 As shown, when the touch information includes the position of the first point 311, the corresponding fingerprint coverage area 3 is the first fingerprint coverage area 31. When the touch information includes the position of the second point 321, the corresponding fingerprint coverage area 3 is the second fingerprint coverage area 32. Taking the image sensor 21 recognizing visible light as an example, the light source of the corresponding fingerprint coverage area 3 can be the recognition area 11 and the non-recognition area 12 located in the fingerprint coverage area 3, or it can be a light-emitting area covering the fingerprint coverage area 3.

[0105] Step 3: Based on the touch information, the control module 40 activates the photosensitive surface 211 of the image sensor 21 corresponding to the fingerprint coverage area 3.

[0106] For example, such as Figure 2 As shown, each image sensor 21 includes a photosensitive surface 211. The photosensitive surface 211 of the image sensor 21 corresponding to the first fingerprint coverage area 31 is... Figure 2 The photosensitive surfaces 211 of the four image sensors 21 used to capture the first fingerprint coverage area 31 are shown. The photosensitive surface of the image sensor 21 corresponding to the second fingerprint coverage area 32 is shown. Figure 2 The five image sensors 21 used to collect the second fingerprint coverage area 32 have photosensitive surfaces 211. In other embodiments, when a single image sensor 21 includes multiple photosensitive surfaces 211, the required photosensitive surfaces 211 can be activated while the unused photosensitive surfaces 211 remain inactive to reduce energy consumption.

[0107] Step 4: The control module 40 reads the comparison image data of the photosensitive surface 211 of the image sensor 21 corresponding to the fingerprint coverage area 3. This comparison image data corresponds to the user's fingerprint image. The control module 40 can simultaneously read data from the photosensitive surfaces 211 of multiple image sensors 21 corresponding to the fingerprint coverage area 3, or it can smoothly read data from the photosensitive surfaces 211 of multiple image sensors 21 corresponding to the fingerprint coverage area 3.

[0108] Step 5: The control module 40 extracts feature information from the comparison image data and matches it with the template. If the match is successful, the fingerprint recognition passes, and the electronic device 100 performs the subsequent corresponding operation (such as screen unlocking, APP unlocking, payment unlocking, etc.). If the match fails, the fingerprint recognition fails, and the electronic device 100 does not perform the subsequent corresponding operation.

[0109] In this embodiment, since the control module 40 activates the corresponding light source and the photosensitive surface 211 of the image sensor 21 according to the user's touch position, the electronic device 100 only needs to activate the required part of the light source and part of the photosensitive surface 211 of the image sensor 21 to perform image acquisition during the fingerprint recognition process. It only needs to process the comparison image data formed by the photosensitive surface 211 of this part of the image sensor 21 to achieve matching judgment. Therefore, the overall power consumption of the electronic device 100 is low, and the image acquisition time is short and the recognition speed is fast.

[0110] The area of ​​the fingerprint coverage area 3 ranges from 35 square millimeters to 200 square millimeters. For example, the area of ​​the fingerprint coverage area 3 can range from 64 square millimeters to 144 square millimeters.

[0111] In this embodiment, the fingerprint coverage area 3 typically includes at least two recognition areas 11. At this time, the area of ​​each recognition area 11 is relatively small. Images acquired by the photosensitive surface 211 of the image sensor 21 corresponding to the at least two recognition areas 11 are stitched together to form the final comparison image. Since the comparison image is composed of multiple images, the comparison image is more accurate, which helps improve the fingerprint recognition accuracy of the electronic device 100 of the application screen component 20.

[0112] Understandably, given that the fingerprint coverage area 3 has a basic acquisition area, the smaller the area of ​​each recognition area 11, the more images are stitched together for the comparison image, resulting in higher image quality and higher fingerprint recognition accuracy. However, a larger number of image sensors 21 also leads to higher costs. Conversely, while a larger area of ​​each recognition area 11 can reduce the number of image sensors 21 and lower costs, it reduces the number of stitched images included in the comparison image, thus lowering the image quality and fingerprint recognition accuracy. Therefore, in designing the area of ​​a single recognition area 11, this embodiment needs to balance the requirements for recognition accuracy and cost.

[0113] Each image sensor 21 has a photosensitive surface 211 comprising multiple sensing units arranged in an array. These sensing units can be complementary metal-oxide-semiconductor (CMOS) sensors or thin-film transistor (TFT) sensors. When a CMOS sensor is used, the substrate of the image sensor 21 is made of a semiconductor material. When a TFT sensor is used, the substrate of the image sensor 21 is made of an insulating material such as glass or an organic dielectric.

[0114] In one optional embodiment, the sensing units in each image sensor 21 are used to sense visible light. Thus, visible light is allowed to pass through a portion or all of the display panel 1, which is a transparent display screen. In this case, the visible light reflected by the user's fingerprint can pass through the display panel 1 and enter the image sensor 21, enabling the screen assembly 20 to successfully acquire the user's fingerprint image. The display light emitted by the display panel 1 can serve as the sensing light for fingerprint recognition in the electronic device 100. This sensing light, reflected by the user's fingerprint, can be acquired by the image sensor 21, thereby forming a comparison image corresponding to the fingerprint image.

[0115] In another optional embodiment, the sensing units in each image sensor 21 are used to sense invisible light. Invisible light includes, for example, near-infrared, infrared, near-ultraviolet, and ultraviolet light. In this case, some or all areas of the display panel 1 allow invisible light to pass through. The display panel 1 can either allow visible light to pass through or block visible light; this application does not impose strict limitations on this. In this embodiment, the electronic device 100 also includes a light source for emitting invisible light. This light source can be independent of the screen assembly 20 or integrated into the screen assembly 20. The invisible light emitted by this light source, after being reflected by the user's fingerprint, can be collected by the image sensor 21, thereby enabling the screen assembly 20 to form a comparison image corresponding to the fingerprint image.

[0116] Among them, the display panel 1 can be an organic light-emitting diode (OLED) panel, a liquid crystal display (LCD) panel, a quantum dot light-emitting diode (QLED) panel, or a micro light-emitting diode (uLED) panel, etc.

[0117] Please see Figure 3 In one optional embodiment, a single image sensor 21 includes a photosensitive surface 211. In this case, the overall volume of the image sensor 21 varies with the area of ​​its photosensitive surface 211. The smaller area of ​​the photosensitive surface 211 results in a smaller overall volume of the image sensor 21, which helps to reduce the cost of the image sensor 21.

[0118] Please see Figure 4 , Figure 4 yes Figure 2 The structure of the screen assembly 20 at line AA is shown in a schematic diagram of another embodiment.

[0119] In another alternative embodiment, a single image sensor 21 includes multiple photosensitive surfaces 211. When the area of ​​a single photosensitive surface 211 is very small, multiple photosensitive surfaces 211 can be integrated into the same image sensor 21 to reduce the difficulty of cutting the image sensor 21, thereby balancing the requirements of small size and easy processing of the image sensor 21.

[0120] In this process, the multiple photosensitive surfaces 211 of the same image sensor 21 can be arranged at intervals or adjacent to each other. The multiple photosensitive surfaces 211 can be arranged on the same plane.

[0121] In the embodiments of this application, the shape and area of ​​each identification region 11 may be the same or different. This application will illustrate the example where the shape and area of ​​each identification region 11 are the same.

[0122] In this embodiment, when the ratio of the area of ​​the identification region 11 to the area of ​​the non-identification region 12 satisfies the conditions described above, the arrangement of the multiple identification regions 11 can be either regular or random. This embodiment will be illustrated using the example of the arrangement of the multiple identification regions 11 being regular.

[0123] Please see Figure 5A , Figure 5A yes Figure 2 The diagram shows a partial structural schematic of the display panel 1 of the screen assembly 20 in one embodiment. Figure 5AThe identification area 11 is shown as a square filled with slanted lines, and the non-identification area 12 is shown as a square that has not been filled.

[0124] Optionally, multiple recognition regions 11 are arranged in rows spaced apart from each other in a first direction X, and in columns spaced apart from each other in a second direction Y, where the second direction Y is perpendicular to the first direction X. Each recognition region 11 in two adjacent rows is arranged in a different column. Similarly, each recognition region 11 in two adjacent columns is arranged in a different column.

[0125] In this embodiment, the first direction X can be parallel to the width direction (also known as the horizontal direction) of the screen assembly 20, and the second direction Y is parallel to the length direction (also known as the vertical direction) of the screen assembly 20. In other embodiments, the first direction X and the second direction Y can be interchanged.

[0126] Figure 5A In the illustrated embodiment, the odd-numbered row identification area 11 is arranged in odd-numbered columns, and the even-numbered row identification area 11 is arranged in even-numbered columns. Rows 1, 3, 5, 7, and 9 are odd-numbered rows. Rows 2, 4, 6, 8, and 10 are even-numbered rows. Columns 1, 3, 5, 7, and 9 are odd-numbered columns. Columns 2, 4, 6, 8, and 10 are even-numbered columns. In other embodiments, the odd-numbered row identification area 11 may also be arranged in even-numbered columns, and the even-numbered row identification area 11 may be arranged in odd-numbered columns.

[0127] In this embodiment, the number of recognition areas 11 included in any two fingerprint coverage areas 3 at different positions of the screen assembly 20 is very close, that is, the number of photosensitive surfaces 211 of the image sensor 21 corresponding to these two fingerprint coverage areas 3 is very close. The screen assembly 20 can obtain sufficient effective collection area in different usage scenarios, so that the fingerprint recognition accuracy of the electronic device 100 is higher.

[0128] In one optional embodiment, the ratio of the total area of ​​all recognition areas 11 to the total area of ​​all non-recognition areas in the fingerprint coverage area 3 is in the range of 1:0.8 to 1:1.2. In this case, in the first direction X, the distance between two adjacent recognition areas 11 can be equal to, slightly greater than, or slightly less than the length of the recognition area 11. In the second direction Y, the distance between two adjacent recognition areas 11 can also be equal to, slightly greater than, or slightly less than the length of the recognition area 11.

[0129] In this embodiment, the screen assembly 20 can comprehensively consider the requirements of manufacturing tolerance, assembly tolerance, total image acquisition area, cost and other aspects to obtain higher product yield, fingerprint recognition accuracy and lower cost.

[0130] In this embodiment, the arrangement of the recognition area 11 and the non-recognition area 12 on the display panel 1 can be varied, including but not limited to:

[0131] Please see Figure 5B , Figure 5B yes Figure 5A The diagram shows a schematic of the identification area 11 and non-identification area 12 of the display panel 1 in one arrangement. Figure 5B In the diagram, the identification area 11 is indicated by grids filled with slanted lines, and the non-identification area 12 is indicated by empty spaces.

[0132] In one arrangement, the display panel 1 includes a plurality of non-identification areas 12, which are spaced apart by identification areas 11. In a first direction X, the length L1 of each identification area 11 is equal to the distance L2 between two adjacent identification areas 11. The distance L2 is equal to the length of the non-identification area 12 in the first direction X. In a second direction Y, the length L3 of each identification area 11 is equal to the distance L4 between two adjacent identification areas 11. The distance L4 is equal to the length of the non-identification area 12 in the second direction Y. In this arrangement, the shape and size of the non-identification areas 12 are the same as those of the identification areas 11.

[0133] See also Figure 5A and Figure 5B , Figure 5A The circular fingerprint coverage area 3 is illustrated as an example. For instance, each recognition area 11 has a size of 3 mm * 3 mm. The fingerprint coverage area 3 is a circular area with a diameter of 9 mm. In the third fingerprint coverage area 33, there are 4 recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the 4 image sensors 21 in the recognition panel 2 corresponding to these 4 recognition areas 11 are used to collect the user's fingerprint image. At this time, the effective collection area is 36 square millimeters, which can meet the minimum collection area requirement for fingerprint recognition. In the fourth fingerprint coverage area 34, there are 5 recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the 5 image sensors 21 in the recognition panel 2 corresponding to these 5 recognition areas 11 are used to collect the user's fingerprint image. At this time, the effective collection area is 45 square millimeters, which can meet the minimum collection area requirement for fingerprint recognition. In this embodiment, the number of photosensitive surfaces 211 of the image sensors 21 corresponding to any two fingerprint coverage areas 3 in different positions of the screen assembly 20 is very similar, and the screen assembly 20 can obtain a sufficient effective collection area in different usage scenarios.

[0134] Please see Figure 5C , Figure 5C yes Figure 5A The diagram shows a different arrangement of the recognition area 11 and non-recognition area 12 of the display panel 1. Figure 5CIn the diagram, the identification area 11 is indicated by grids filled with slanted lines, and the non-identification area 12 is indicated by empty spaces.

[0135] In another arrangement, the non-identification area 12 is a single, integrated area. In the first direction X, the length L1 of each identification area 11 is less than the distance L2 between two adjacent identification areas 11. The distance L2 is the length of the portion of the non-identification area 12 located between two adjacent identification areas 11 in the first direction X. In the second direction Y, the length L3 of each identification area 11 is less than the distance L4 between two adjacent identification areas 11. The distance L4 is the length of the portion of the non-identification area 12 located between two adjacent identification areas 11 in the second direction Y.

[0136] Please see Figure 5D , Figure 5D yes Figure 5A The diagram shows the identification area 11 and non-identification area 12 of the display panel 1 in another arrangement. Figure 5D In the diagram, the identification area 11 is indicated by grids filled with slanted lines, and the non-identification area 12 is indicated by empty spaces.

[0137] In another arrangement, the display panel 1 includes multiple non-identification areas 12, which are separated by identification areas 11. In the first direction X, the length L1 of each identification area 11 is greater than the distance L2 between two adjacent identification areas 11. The distance L2 is the length of the non-identification area 12 in the first direction X. In the second direction Y, the length L3 of each identification area 11 is greater than the distance L4 between two adjacent identification areas 11. The distance L4 is the length of the non-identification area 12 in the second direction Y. The shape of the non-identification area 12 is the same as or similar to that of the identification area 11, and the area of ​​the non-identification area 12 is smaller than that of the identification area 11. In this embodiment, the image formed by stitching together the images from the multiple identification areas 11 has a small amount of redundancy. This redundancy can be processed into a suitable comparison image to improve the fingerprint recognition accuracy of the electronic device 100.

[0138] Please see Figure 6A , Figure 6A yes Figure 2 A partial structural diagram of the display panel 1 of the screen assembly 20 in another embodiment is shown. Figure 6A The identification area 11 is shown as a square filled with slanted lines, and the non-identification area 12 is shown as a square that has not been filled.

[0139] Optionally, multiple identification regions 11 are arranged at intervals along the first direction X. That is, in the first direction X, a non-identification region 12 is arranged between any two adjacent identification regions 11. In this case, the distance between any two adjacent identification regions 11 in the first direction X has a first dimension, and the length of each identification region 11 has a second dimension. The first dimension is also the length of the portion of the non-identification region 12 located between two identification regions 11 in the first direction X. The first dimension can be greater than, equal to, or less than the second dimension; the embodiments of this application do not strictly limit the dimensional relationship between the two.

[0140] exist Figure 6A In the illustrated embodiment, multiple recognition areas 11 are arranged in a continuous column along the second direction Y, which is perpendicular to the first direction X. In this case, two adjacent recognition areas 11 along the second direction Y are adjacent to each other. That is, the distance between two adjacent recognition areas 11 along the second direction Y (which can be zero, negative, or positive) is much smaller than the distance between two adjacent recognition areas 11 along the first direction X. In this case, the display panel 1 includes multiple non-recognition areas 12. A strip-shaped non-recognition area 12 is formed between any two adjacent columns of recognition areas 11. In other embodiments, the multiple recognition areas 11 may also have other arrangements along the second direction Y, such as being spaced apart from each other.

[0141] Figure 6A The diagram illustrates a circular fingerprint coverage area 3 as an example. For instance, each recognition area 11 is 2 mm x 2 mm in size. The fingerprint coverage area 3 is a circular area with a diameter of 10 mm. The fifth fingerprint coverage area 35 includes 10 recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the 10 image sensors 21 in the recognition panel 2, corresponding to these 10 recognition areas 11, are used to acquire the user's fingerprint image. At this time, the effective acquisition area is 40 square millimeters, which meets the minimum acquisition area requirement for fingerprint recognition. The sixth fingerprint coverage area 36 includes 15 recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the 15 image sensors 21 in the recognition panel 2, corresponding to these 15 recognition areas 11, are used to acquire the user's fingerprint image. At this time, the effective acquisition area is 60 square millimeters, which meets the minimum acquisition area requirement for fingerprint recognition.

[0142] In this embodiment, since multiple recognition areas 11 are arranged at intervals in the first direction, when two fingerprint coverage areas 3 are located at different positions on the display panel 1, the number of photosensitive surfaces 211 of the image sensors 21 corresponding to the two fingerprint coverage areas 3 is the same or similar, thereby ensuring that the screen assembly 20 can obtain sufficient effective collection area in different usage scenarios, so that the fingerprint recognition accuracy of the electronic device 100 is high.

[0143] Please see Figure 6B ,yes Figure 2 The diagram shows a partial structural schematic of the display panel 1 of the screen assembly 20 in another embodiment. Figure 6C The identification area 111 is represented by squares filled with slanted lines, and the non-identification area 112 is represented by squares that are not filled.

[0144] Optionally, the multiple identification regions 111 are arranged at intervals in a first direction. That is, in the first direction, at least one non-identification region 112 is arranged between any two adjacent identification regions 111. The first direction is the row or column direction of the region array formed by the multiple regions 11. In the first direction, the multiple identification regions 111 and the multiple non-identification regions 112 can be arranged alternately, alternately in pairs, or alternately in pairs; this application does not impose strict limitations on this arrangement.

[0145] Multiple identification regions 111 are arranged at intervals in a second direction, which is perpendicular to the first direction. That is, in the second direction, at least one non-identification region 112 is arranged between any two adjacent identification regions 111. Figure 6B In the illustrated embodiment, the first dimension is larger than the second dimension; for example, the first dimension is twice the second dimension. The third dimension is larger than the fourth dimension; for example, the third dimension is twice the fourth dimension. In this case, the plurality of recognition areas 11 are arranged consecutively in the diagonal directions of the first direction X and the second direction Y. The display panel 1 includes a plurality of non-recognition areas 12. A non-recognition area 12 is formed between two adjacent recognition areas 11 in the diagonal direction. The non-recognition area 12 is generally stepped.

[0146] exist Figure 6B In the illustrated embodiment, each region 11 has a size of 2 mm * 2 mm. The fingerprint coverage area 3 is a circular area with a diameter of 10 mm. The seventh fingerprint coverage area 37 includes eight recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the eight image sensors 21 in the recognition panel 2, corresponding to these eight recognition areas 11, are used to acquire the user's fingerprint image. At this time, the effective acquisition area is 32 square millimeters, which meets the minimum acquisition area requirement for fingerprint recognition. The eighth fingerprint coverage area 38 includes nine recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the nine image sensors 21 in the recognition panel 2, corresponding to these nine recognition areas 11, are used to acquire the user's fingerprint image. At this time, the effective acquisition area is 36 square millimeters, which meets the minimum acquisition area requirement for fingerprint recognition.

[0147] In this embodiment, when multiple recognition areas 11 are arranged at intervals in both the first and second directions, the number of photosensitive surfaces 211 of the image sensors 21 corresponding to the two fingerprint coverage areas 3 located at different positions on the display panel 1 is the same or more similar, further ensuring that the screen assembly 20 can obtain sufficient effective collection area in different usage scenarios, so that the fingerprint recognition accuracy of the electronic device 100 is higher.

[0148] In this embodiment, the arrangement of the multiple recognition areas 11 and the multiple non-recognition areas 12 in the first direction is the same as the arrangement in the second direction. In this case, the screen assembly 20 has higher reliability in obtaining sufficient effective collection area under different usage scenarios, and the fingerprint recognition accuracy of the electronic device 100 is higher. Of course, in other embodiments, the arrangement of the multiple recognition areas 11 in the first direction and the arrangement in the second direction may also be different.

[0149] Please see Figure 6C , Figure 6C yes Figure 2 The diagram shows a partial structural schematic of the display panel 1 of the screen assembly 20 in another embodiment. Figure 6C The identification area 11 is shown as a square filled with slanted lines, and the non-identification area 12 is shown as a square that has not been filled.

[0150] Optionally, the plurality of identification regions 11 include a plurality of identification region groups 13. Each identification region group 13 includes at least two adjacent identification regions 11. Any two adjacent identification region groups 13 are spaced apart from each other. Wherein, at least two identification regions 11 are adjacent to each other means that the distance between two adjacent identification regions 11 within the same identification region group 13 is much smaller than the distance between two adjacent identification region groups 13. Any two adjacent identification region groups 13 form a non-identification region 12. The plurality of identification region groups 13 are arranged spaced apart from each other in the first direction X, and are arranged spaced apart or continuously in the second direction Y, where the second direction Y is perpendicular to the first direction X.

[0151] exist Figure 6C In the illustrated embodiment, each identification area group 13 includes four identification areas 11 arranged in an array. Two of the four identification areas 11 are arranged in the first direction X, and the other two are arranged in the second direction Y. In this embodiment, the non-identification area 12 of the display panel 1 is a single integrated area. In the first direction X, non-identification areas 12 are arranged between adjacent identification area groups 13. In the second direction Y, non-identification areas 12 are arranged between adjacent identification area groups 13.

[0152] Each recognition area 11 measures 2 mm x 2 mm. The fingerprint coverage area 3 is a circular area with a diameter of 10 mm. The ninth fingerprint coverage area 39 includes 16 recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the 16 image sensors 21 in the recognition panel 2, corresponding to these 16 recognition areas 11, are used to acquire the user's fingerprint image. At this time, the effective acquisition area is 64 square millimeters, which meets the minimum acquisition area requirement for fingerprint recognition. The tenth fingerprint coverage area 310 includes 9 recognition areas 11. Correspondingly, the photosensitive surfaces 211 of the 9 image sensors 21 in the recognition panel 2, corresponding to these 9 recognition areas 11, are used to acquire the user's fingerprint image. At this time, the effective acquisition area is 36 square millimeters, which meets the minimum acquisition area requirement for fingerprint recognition.

[0153] In this embodiment, since each identification area group 13 includes at least two identification areas 11, and any two adjacent identification area groups 13 are spaced apart from each other, the arrangement of the identification areas 11 is more diverse, which is beneficial to meeting the fingerprint recognition needs of different electronic devices 100. The inclusion of at least two identification areas 11 in each identification area group 13 also enables the identification areas 11 to capture continuous images within a small area, so that the final comparison image formed by the screen assembly 20 is composed of at least two continuous images. This makes it easier to compare the final comparison image with the standard image in the electronic device 100, resulting in higher fingerprint recognition accuracy for the electronic device 100.

[0154] In other embodiments, the number of identification regions 11 included in the identification region group 13, the arrangement of the identification regions 11 in the identification region group 13, etc., can all be set in other ways, and this application does not impose strict limitations on them.

[0155] The fingerprint coverage area 3 includes at least two recognition area groups 13. The final comparison image formed by the screen assembly 20 is stitched together from the images acquired by the at least two recognition area groups 13, resulting in high image quality and thus high fingerprint recognition accuracy for the electronic device 100 using the screen assembly 20.

[0156] Please see Figure 7 , Figure 7 yes Figure 3 The diagram shows a schematic representation of the screen assembly 20 in the first embodiment. In the first embodiment, an example is provided where a single image sensor 21 includes one photosensitive surface 211. In other embodiments, a single image sensor 21 may also include multiple photosensitive surfaces 211. Other features of this embodiment can be found in the first embodiment and will not be repeated here.

[0157] In one optional embodiment, the recognition panel 2 further includes a substrate 22 and an optical layer 23. The substrate 22 is located on the non-light-emitting side of the display panel 1. A plurality of image sensors 21 are fixed to the side of the substrate 22 facing the display panel 1. The photosensitive surface 211 of each image sensor 21 is disposed away from the substrate 22, i.e., facing the display panel 1. The optical layer 23 is located between the plurality of image sensors 21 and the display panel 1. The optical layer 23 is used to image the user fingerprint image located on the light-emitting side of the recognition area 11 onto the photosensitive surface 211 of the corresponding image sensor 21. The screen assembly 20 processes the light reflected by the user fingerprint through the optical layer 23 to form a corresponding acquired image on the photosensitive surface 211 of the corresponding image sensor 21, which corresponds to the user fingerprint image.

[0158] In this embodiment, since the screen assembly 20 is provided with an optical layer 23, which can change the state of light, the relative positional relationship between the photosensitive surface 211 of the image sensor 21 and the display panel 1 can be changed by setting the structure and size of the optical layer 23, making the structure of the screen assembly 20 more diverse and the application range of the screen assembly 20 wider.

[0159] In this embodiment, the arrangement of the photosensitive surfaces 211 of the multiple image sensors 21 corresponds to the arrangement of the multiple recognition areas 11. The photosensitive surfaces 211 of the multiple image sensors 21 can acquire fingerprint images located on the multiple recognition areas 11 in a one-to-one correspondence. At this time, the optical layer 23 causes minimal change to the direction of light propagation, reducing the risk of light distortion during propagation leading to insufficient accuracy in the final comparison image, thus resulting in high fingerprint recognition accuracy of the electronic device 100 using the application screen assembly 20. A single image sensor 21 may include one photosensitive surface 211 (e.g., ...). Figure 7 As shown), it may also include multiple photosensitive surfaces 211 (see reference). Figure 4 ).

[0160] In other embodiments, the optical layer 23 can change the direction of light propagation, so the relative positional relationship between the photosensitive surfaces 211 of the multiple image sensors 21 can be slightly different from the relative positional relationship of the multiple recognition areas 11.

[0161] For example, the direction of light propagation can be changed by the optical layer 23, so that the photosensitive surface 211 of a single image sensor 21 can simultaneously capture fingerprint images on two or more recognition areas 11. Therefore, the total number of image sensors 21 is less than the total number of recognition areas 11, resulting in a lower cost for the screen assembly 20.

[0162] For example, a single image sensor 21 includes multiple photosensitive surfaces 211, which are adjacent to each other. Multiple recognition areas 11 corresponding to the multiple photosensitive surfaces 211 are spaced apart from each other. The optical layer 23 changes the direction of light propagation, causing the light entering from these recognition areas 11 to converge and enter the multiple adjacent photosensitive surfaces 211, thereby achieving image acquisition.

[0163] In one embodiment, the substrate 22 may be a rigid printed circuit board (PCB). In another embodiment, the substrate 22 may include a flexible printed circuit board (FPC) and a reinforcing plate, wherein the reinforcing plate and the flexible printed circuit board are stacked together.

[0164] In one embodiment, multiple image sensors 21 can be directly bonded to the substrate 22 using a die-attach method. In another embodiment, multiple image sensors 21 can be connected into a single package structure using a fan-out process, and then the package structure is bonded to the substrate 22 as a whole.

[0165] Optionally, the recognition panel 2 also includes a package 24. The package 24 is located on the side of the substrate 22 facing the display panel 1 and is disposed around the plurality of image sensors 21. In this case, the package 24 encapsulates the plurality of image sensors 21 into a single package structure. The package 24 may employ a fan-out process to encapsulate the plurality of image sensors 21. An optical layer 23 covers the package 24 and the plurality of image sensors 21. In this case, the optical layer 23 may be a single-piece structure.

[0166] In this embodiment, the package 24 can first encapsulate multiple image sensors 21 into an integrated package structure, then attach the package structure to the substrate 22, and then cover the package 24 and multiple image sensors 21 with an integrated optical layer 23. Therefore, the assembly process of the screen assembly 20 has fewer steps and lower process difficulty, which helps to reduce the production cost of the screen assembly 20.

[0167] The encapsulation component 24 may be made of light-shielding material to reduce the risk of poor image quality due to cross-lighting.

[0168] Please see Figure 8A , Figure 8A yes Figure 7 The diagram shows the structure of the screen component 20 in the first embodiment.

[0169] In one alternative embodiment, the optical layer 23 includes a plurality of collimators 231. The collimators 231 are used to convert diverging light into collimated light. The plurality of collimators 231 are disposed one-to-one with the photosensitive surfaces 211 of the plurality of image sensors 21.

[0170] In this embodiment, multiple collimators 231 image a 1:1 scale image on the photosensitive surface 211 of the image sensor 21. Because the multiple collimators 231 can collimate the light reflected by the user's fingerprint, the image quality of the acquired image is high, and the screen assembly 20 can form a high-quality comparison image, thereby achieving high fingerprint recognition accuracy of the electronic device 100.

[0171] Since the collimator 231 is used to image a 1:1 scale image, the area of ​​the photosensitive surface 211 of the image sensor 21 is similar to the area of ​​the recognition area 11 on the display panel 1. Considering the tolerances during assembly of multiple image sensors 21, reasonable clearance can be reserved between two image sensors 21 that are close to each other to improve the assembly accuracy and product yield of the screen assembly 20. In this case, the area of ​​the recognition area 11 is correspondingly reduced appropriately.

[0172] In this process, the package 24 can first encapsulate multiple image sensors 21, and then assemble the optical layer 23. In this case, the optical layer 23 can be an integrated structure including multiple collimators 231. For example, each collimator 231 can be a pre-formed thin film with collimation holes, and then each collimator 231 can be attached to the photosensitive surface 211 of the corresponding image sensor 21. Multiple collimators 231 are integrally formed in the same thin film.

[0173] In other embodiments, the optical layer 23 may also include a substrate and a light-blocking film. The substrate is made of a light-transmitting material. The light-blocking film is laminated on the substrate. The light-blocking film has multiple sets of collimating holes, and each set of collimating holes forms a collimator 231.

[0174] Please see Figure 8B , Figure 8B yes Figure 7 The diagram shows the structure of the screen assembly 20 in the second embodiment.

[0175] In one optional embodiment, the optical layer 23 includes a plurality of light-transmitting holes 232. The optical layer 23 may include a substrate 2321 and a light-shielding film 2322. The substrate 2321 may be a one-piece molded structure. The light-shielding film 2322 may also be a one-piece molded structure. The light-shielding film 2322 is located on the side of the substrate 2321 facing the display panel 1. The substrate 2321 is made of a light-transmitting material, such as glass or polycarbonate (PC). The light-shielding film 2322 has a plurality of light-transmitting holes 232. The light-shielding film 2322 is made of a light-shielding material. The plurality of light-transmitting holes 232 are arranged one-to-one with the photosensitive surfaces 211 of the plurality of image sensors 21. A first spacing S1 is formed between the center of each light-transmitting hole 232 and the light-emitting surface 13 of the display panel 1, and a second spacing S2 is formed between each light-transmitting hole 232 and the photosensitive surface 211 of the image sensor 21, wherein the first spacing S1 is greater than the second spacing S2. In other words, the distance between the center of each light-transmitting hole 232 and the light-emitting surface 13 of the display panel 1 is greater than the distance between the center of each light-transmitting hole 232 and the photosensitive surface 211 of the image sensor 21.

[0176] In this embodiment, utilizing the pinhole imaging principle, multiple light-transmitting pinholes 232 image a captured image with an object-image ratio of X:1 on the photosensitive surface 211 of the image sensor 21. X is greater than 1. At this time, the area of ​​the captured image is smaller than the area of ​​the recognition area 11 on the display panel 1. Therefore, while keeping the area of ​​the recognition area 11 constant, the area of ​​the photosensitive surface 211 of the image sensor 21 can be reduced, thus lowering the cost of the image sensor 21 and the screen assembly 20. Simultaneously, while keeping the area of ​​the photosensitive surface 211 of the image sensor 21 constant, the area of ​​the recognition area 11 corresponding to the image sensor 21 increases. Redundant stitching can be used for the multiple recognition areas 11, thereby improving the fingerprint recognition accuracy of the electronic device 100.

[0177] The screen assembly 20 can reduce the area of ​​the photosensitive surface 211 of the image sensor 21 or increase the area of ​​the recognition area 11 corresponding to the photosensitive surface 211 of the image sensor 21 by adjusting the size of the first spacing S1 and the second spacing S2.

[0178] In this design, the light-emitting surface 13 of the display panel 1 is the surface of the display panel 1 that is away from the recognition panel 2. The non-light-emitting surface 14 of the display panel 1 is positioned opposite to the light-emitting surface 13. A gap S3 is formed between the non-light-emitting surface 14 of the display panel 1 and the center of the light-transmitting aperture 232. The size of the first gap S1 can be adjusted by adjusting the size of this gap S3.

[0179] The substrate 2321 of the optical layer 23 has a thickness (the dimension in the direction perpendicular to the photosensitive surface 211 of the image sensor 21). The size of the second spacing S2 can be adjusted by adjusting the thickness of the substrate 2321.

[0180] Optionally, the screen assembly 20 further includes a transparent adhesive layer 25. The adhesive layer 25 is bonded between the display panel 1 and the optical layer 23. In this embodiment, the adhesive layer 25 fills the space between the display panel 1 and the optical layer 23. The adhesive layer 25 can bond the optical layer 23 and the display panel 1, and can also prevent light scattering due to the air layer from affecting the quality of the acquired image. The adhesive layer 25 can be made of transparent optical adhesive.

[0181] Please see Figure 8C , Figure 8C yes Figure 7 The diagram shows the structure of the screen component 20 in the third embodiment.

[0182] In one optional embodiment, the optical layer 23 includes a plurality of lenses 233. The plurality of lenses 233 are positioned one-to-one with the photosensitive surfaces 211 of the plurality of image sensors 21. The lenses 233 are used to image and reduce the user's fingerprint image to the photosensitive surface 211 of the image sensor 21. The lenses 233 also serve to focus light. The optical layer 23 further includes a fixing substrate 234, which is made of a transparent material. The plurality of lenses 233 are fixed to the fixing substrate 234 to form an integral structure with the fixing substrate 234.

[0183] In this embodiment, lens 233 is used to image and reduce the user's fingerprint image to the photosensitive surface 211 of image sensor 21. The area ratio of the acquired image formed on the photosensitive surface 211 of image sensor 21 to the corresponding recognition area 11 is less than 1, that is, the object-image ratio is greater than 1. At this time, the area of ​​the acquired image is smaller than the area of ​​the recognition area 11 on display panel 1. Therefore, with the area of ​​the recognition area 11 remaining unchanged, the area of ​​the photosensitive surface 211 of image sensor 21 can be reduced, thereby reducing the cost of image sensor 21 and screen assembly 20. At the same time, with the area of ​​the photosensitive surface 211 of image sensor 21 remaining unchanged, the area of ​​the recognition area 11 corresponding to image sensor 21 increases. The stitching of multiple recognition areas 11 can adopt redundant stitching, thereby improving the fingerprint recognition accuracy of electronic device 100.

[0184] Each lens 233 may include one or more sub-lenses. In this embodiment, the single lens 233 includes one sub-lens, which is a convex lens. In other embodiments, the single lens 233 includes multiple sub-lenses, which may be multiple convex lenses or a combination of concave and convex lenses. In other embodiments, the lens 233 may also be a planar lens made using a metamaterial structure.

[0185] Please see Figure 9 , Figure 9 yes Figure 3The diagram shows a schematic representation of the screen assembly 20 in the second embodiment. In this second embodiment, an example is provided where a single image sensor 21 includes one photosensitive surface 211. In other embodiments, a single image sensor 21 may also include multiple photosensitive surfaces 211. Other features of this embodiment can be found in the second embodiment and will not be repeated here.

[0186] In one optional embodiment, the optical layer 23 includes a plurality of optical elements 230. The plurality of optical elements 230 are spaced apart from each other. The plurality of optical elements 230 are located on one side of the image acquired by the corresponding image sensor 21, that is, above the photosensitive surface 211 of the image sensor 21. The plurality of optical elements 230 are located one-to-one on the plurality of image sensors 21. When a single image sensor 21 includes multiple photosensitive surfaces 211, a plurality of optical elements 230 can also be disposed on one image sensor 21, with the plurality of optical elements 230 corresponding one-to-one on the plurality of photosensitive surfaces 211. The recognition panel 2 also includes a plurality of encapsulation bodies 26. The plurality of encapsulation bodies 26 are disposed one-to-one with the plurality of optical elements 230. Each encapsulation body 26 is used to encapsulate the corresponding optical element 230 and the image sensor 21 into an integrated unit component 27.

[0187] The recognition panel 2 also includes a package 24. The package 24 is located on the side of the substrate 22 facing the display panel 1 and is disposed around a plurality of image sensors 21 and a plurality of optical components 230. In one embodiment, the image sensors 21 and the optical components 230 above them can be first formed into unit components 27. After the plurality of unit components 27 are fixed to the substrate 22, the package 24 encapsulates the plurality of unit components 27 and the substrate 22 into an integral structure. In another embodiment, the image sensors 21 and the optical components 230 above them can be first formed into unit components 27. After the plurality of unit components 27 are encapsulated into an integral structure by the package 24, the structure is attached to the substrate 22 to complete the assembly.

[0188] In this embodiment, since the corresponding optical part 230 and image sensor 21 can form a unit component 27, and then multiple unit components 27 are fixed to the substrate 22 according to specific arrangement requirements, the screen component 20 can form different recognition panels 2 by changing the position of the unit components 27 without changing the material type, which is beneficial to the mass production and multi-model of the screen component 20.

[0189] The material of the encapsulation body 26 in unit component 27 may be the same as or different from the material of the encapsulation component 24; this application does not impose strict limitations on this. In one embodiment, one or both of the encapsulation body 26 and the encapsulation component 24 are made of light-shielding material to reduce the risk of poor image quality due to crosstalk.

[0190] Please see Figure 10A , Figure 10A yes Figure 9 The diagram shows the structure of the screen component 20 in the first embodiment.

[0191] In one alternative embodiment, the optical layer 23 includes a plurality of collimators 231. The plurality of collimators 231 are disposed one-to-one with the photosensitive surfaces 211 of the plurality of image sensors 21. The plurality of collimators 231 are spaced apart from each other. Each optical unit 230 includes one collimator 231 (corresponding to a scheme where a single sensor 21 includes one photosensitive surface 211) or multiple collimators 231 (corresponding to a scheme where a single sensor 21 includes multiple photosensitive surfaces 211). The collimators 231 are used to convert diverging light into collimated light. The corresponding image sensor 21 and optical unit 230 can be first formed into unit components 27 and then packaged by a package 24. That is, the package 26 first fixes the collimators 231 to the corresponding image sensor 21 to form an integrated, modular unit component 27. Then, the multiple unit components 27 are fixed to the substrate 22 by the package 24 to form the recognition panel 2.

[0192] In this embodiment, multiple collimators 231 image a 1:1 scale image on the photosensitive surface 211 of the image sensor 21. Because the multiple collimators 231 can collimate the light reflected by the user's fingerprint, the image quality of the acquired image is high, and the screen assembly 20 can form a high-quality comparison image, thereby achieving high fingerprint recognition accuracy of the electronic device 100.

[0193] Since the collimator 231 is used to image a 1:1 scale image, the area of ​​the photosensitive surface 211 of the image sensor 21 is similar to the area of ​​the recognition area 11 on the display panel 1. Considering the tolerances during assembly of multiple image sensors 21, reasonable clearance can be reserved between two image sensors 21 that are close to each other to improve the assembly accuracy and product yield of the screen assembly 20. In this case, the area of ​​the recognition area 11 is correspondingly reduced appropriately.

[0194] Each collimator 231 can be directly formed on the photosensitive surface 211 of the image sensor 21 using a wafer-level fabrication process. For example, a collimation hole structure can be deposited or etched on the photosensitive surface 211 of the image sensor 21 using a multilayer mask process to form the collimator 231.

[0195] Please see Figure 10B , Figure 10B yes Figure 9 The diagram shows the structure of the screen assembly 20 in the second embodiment.

[0196] In one optional embodiment, the optical layer 23 includes a plurality of light-transmitting holes 232. The optical layer 23 may include a substrate 2321 and a light-shielding film 2322, the light-shielding film 2322 being located on the side of the substrate 2321 facing the display panel 1. The substrate 2321 is made of a light-transmitting material, such as glass or polycarbonate (PC). The light-shielding film 2322 has a plurality of light-transmitting holes 232. The light-shielding film 2322 is made of a light-shielding material. The plurality of light-transmitting holes 232 are disposed one-to-one facing the photosensitive surfaces 211 of the plurality of image sensors 21. Specifically, the substrate 2321 includes a plurality of substrate portions 2323, which are spaced apart from each other. The plurality of substrate portions 2323 are disposed one-to-one facing the plurality of image sensors 21. The light-shielding film 2322 includes a plurality of light-shielding portions 2324, which are spaced apart from each other, and each light-shielding portion 2324 is provided with a light-transmitting hole 232. The number of light-transmitting apertures 232 is the same as the number of photosensitive surfaces 211 on the corresponding image sensor 21. Multiple light-shielding portions 2324 are located on multiple base portions 2323 in a one-to-one correspondence. Each light-shielding portion 2324 and base portion 2323 is fixed to the corresponding image sensor 21 by the package 26 to form an integrated, modular unit assembly 27.

[0197] Each light-transmitting hole 232 has a first spacing S1 between its center and the light-emitting surface 13 of the display panel 1, and a second spacing S2 between its center and the photosensitive surface 211 of the image sensor 21. The first spacing S1 is greater than the second spacing S2. In other words, the distance between the center of each light-transmitting hole 232 and the light-emitting surface 13 of the display panel 1 is greater than the distance between the center of each light-transmitting hole 232 and the photosensitive surface 211 of the image sensor 21.

[0198] In this embodiment, utilizing the pinhole imaging principle, multiple light-transmitting pinholes 232 image a captured image with an object-image ratio of X:1 on the photosensitive surface 211 of the image sensor 21. X is greater than 1. At this time, the area of ​​the captured image is smaller than the area of ​​the recognition area 11 on the display panel 1. Therefore, while keeping the area of ​​the recognition area 11 constant, the area of ​​the photosensitive surface 211 of the image sensor 21 can be reduced, thus lowering the cost of the image sensor 21 and the screen assembly 20. Simultaneously, while keeping the area of ​​the photosensitive surface 211 of the image sensor 21 constant, the area of ​​the recognition area 11 corresponding to the image sensor 21 increases. Redundant stitching can be used for the multiple recognition areas 11, thereby improving the fingerprint recognition accuracy of the electronic device 100.

[0199] The screen assembly 20 can reduce the area of ​​the photosensitive surface 211 of the image sensor 21 or increase the area of ​​the recognition area 11 corresponding to the image sensor 21 by adjusting the size of the first spacing S1 and the second spacing S2.

[0200] In this design, the light-emitting surface 13 of the display panel 1 is the surface of the display panel 1 that is away from the recognition panel 2. The non-light-emitting surface 14 of the display panel 1 is positioned opposite to the light-emitting surface 13. A gap S3 is formed between the non-light-emitting surface 14 of the display panel 1 and the center of the light-transmitting aperture 232. The size of the first gap S1 can be adjusted by adjusting the size of this gap S3.

[0201] The substrate 2321 of the optical layer 23 has a thickness (the dimension in the direction perpendicular to the photosensitive surface 211 of the image sensor 21). The size of the second spacing S2 can be adjusted by adjusting the thickness of the substrate 2321.

[0202] Optionally, the screen assembly 20 further includes a transparent adhesive layer 25, which is bonded between the display panel 1 and the optical layer 23. In this embodiment, the adhesive layer 25 fills the space between the display panel 1 and the optical layer 23. The adhesive layer 25 can bond the optical layer 23 and the display panel 1, and can also prevent light scattering due to the air layer from affecting the quality of the acquired image. The adhesive layer 25 can be made of transparent optical adhesive. In one embodiment, the adhesive layer 25 can also simultaneously cover the encapsulation component 24.

[0203] Please see Figure 10C , Figure 10C yes Figure 9 The diagram shows the structure of the screen component 20 in the third embodiment.

[0204] In one alternative embodiment, the optical layer 23 includes a plurality of lenses 233. The plurality of lenses 233 are disposed one-to-one with the photosensitive surfaces 211 of the plurality of image sensors 21. Each optical unit 230 includes either one lens 233 (corresponding to a scheme where a single sensor 21 includes one photosensitive surface 211) or multiple lenses 233 (corresponding to a scheme where a single sensor 21 includes multiple photosensitive surfaces 211). The lenses 233 are used to image and reduce the user's fingerprint image to the photosensitive surface 211 of the image sensor 21. The lenses 233 serve as light-focusing components. The lenses 233 can be fixed to the corresponding image sensors 21 by the package 26 to form an integrated, modular unit component 27.

[0205] In this embodiment, lens 233 is used to image and reduce the user's fingerprint image to the photosensitive surface 211 of image sensor 21. The area ratio of the acquired image formed on the photosensitive surface 211 of image sensor 21 to the corresponding recognition area 11 is less than 1, that is, the object-image ratio is greater than 1. At this time, the area of ​​the acquired image is smaller than the area of ​​the recognition area 11 on display panel 1. Therefore, with the area of ​​the recognition area 11 remaining unchanged, the area of ​​the photosensitive surface 211 of image sensor 21 can be reduced, thereby reducing the cost of image sensor 21 and screen assembly 20. At the same time, with the area of ​​the photosensitive surface 211 of image sensor 21 remaining unchanged, the area of ​​the recognition area 11 corresponding to image sensor 21 increases. The stitching of multiple recognition areas 11 can adopt redundant stitching, thereby improving the fingerprint recognition accuracy of electronic device 100.

[0206] Each lens 233 may include one or more sub-lenses. In this embodiment, the single lens 233 includes one sub-lens, which is a convex lens. In other embodiments, the single lens 233 includes multiple sub-lenses, which may be multiple convex lenses or a combination of concave and convex lenses. In other embodiments, the lens 233 may also be a planar lens made using a metamaterial structure.

[0207] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A screen assembly, characterized in that, Includes a display panel and an identification panel located on the non-light-emitting side of the display panel; The display panel includes multiple recognition areas, and a non-recognition area is formed between two adjacent and spaced-apart recognition areas. The recognition panel includes multiple image sensors, and the photosensitive surfaces of the multiple image sensors are used to acquire user fingerprint images located in the multiple recognition areas in a one-to-one correspondence. The photosensitive surfaces of the multiple image sensors each include multiple sensing units arranged in an array, and the sensing units are used to sense light. In the fingerprint coverage area, the ratio of the total area of ​​all the identified areas to the total area of ​​all the non-identified areas is greater than or equal to 1:5; The recognition panel further includes an optical layer located between the image sensor and the display panel; The optical layer includes a plurality of light-transmitting holes, which are arranged one-to-one with the photosensitive surfaces of the plurality of image sensors. A first distance is formed between the center of each light-transmitting hole and the light-emitting surface of the display panel, and a second distance is formed between the center of each light-transmitting hole and the photosensitive surface of the image sensor. The first distance is greater than the second distance.

2. The screen assembly according to claim 1, characterized in that, Within the fingerprint coverage area, the ratio of the total area of ​​all the identified areas to the total area of ​​all the non-identified areas is in the range of 1:2 to 2:

1.

3. The screen assembly according to claim 1, characterized in that, The multiple identification regions are arranged at intervals from each other in the first direction.

4. The screen assembly according to claim 3, characterized in that, The plurality of identification regions are arranged at intervals with each other in a second direction, which is perpendicular to the first direction.

5. The screen assembly according to claim 1, characterized in that, The plurality of identification regions are arranged in rows spaced apart from each other in a first direction and in columns spaced apart from each other in a second direction, the second direction being perpendicular to the first direction, and each identification region in two adjacent rows of identification regions is arranged in different columns.

6. The screen assembly according to claim 5, characterized in that, Within the fingerprint coverage area, the ratio of the total area of ​​all the identified areas to the total area of ​​all the non-identified areas is in the range of 1:0.8 to 1:1.

2.

7. The screen assembly according to claim 1, characterized in that, The plurality of identification regions include a plurality of identification region groups, each of the identification region groups including at least two identification regions that are adjacent to each other, and any two adjacent identification region groups are arranged at intervals.

8. The screen assembly according to claim 1, characterized in that, A single image sensor may include one photosensitive surface; or, a single image sensor may include multiple photosensitive surfaces.

9. The screen assembly according to any one of claims 1 to 8, characterized in that, The recognition panel further includes a substrate located on the non-light-emitting side of the display panel. The plurality of image sensors are fixed to the side of the substrate facing the display panel. The optical layer is located between the plurality of image sensors and the display panel. The optical layer is used to image the user fingerprint image located on the light-emitting side of the recognition area onto the photosensitive surface of the corresponding image sensor.

10. The screen assembly according to claim 9, characterized in that, The recognition panel further includes a package located on the side of the substrate facing the display panel and surrounding the plurality of image sensors, and the optical layer covers the package and the plurality of image sensors.

11. The screen assembly according to claim 9, characterized in that, The optical layer includes a plurality of optical elements, which are located one-to-one on the plurality of image sensors. The recognition panel also includes a package, which is located on the side of the substrate facing the display panel and is disposed around the plurality of image sensors and the plurality of optical elements.

12. The screen assembly according to claim 10 or 11, characterized in that, The optical layer includes multiple collimators, which are positioned one-to-one with the photosensitive surfaces of the multiple image sensors.

13. The screen assembly according to claim 1, characterized in that, The screen assembly also includes a transparent adhesive layer, which is bonded between the display panel and the optical layer.

14. The screen assembly according to claim 10 or 11, characterized in that, The optical layer includes multiple lenses, which are arranged one-to-one with the photosensitive surfaces of the multiple image sensors. The lenses are used to image the user's fingerprint image and reduce it to the photosensitive surface of the image sensor.

15. An electronic device, characterized in that, It includes a housing and a screen assembly according to any one of claims 1 to 14, the screen assembly being mounted on the housing.

Images