CN220691425U - Fingerprint module, display screen and electronic equipment - Google Patents

Abstract

The embodiment of the application provides a fingerprint module, a display screen and electronic equipment. The fingerprint module sets up in the below of no polaroid display screen, no polaroid display screen can pass through infrared light signal, the fingerprint module includes: a first circuit board; the infrared light-emitting piece is electrically connected to the first circuit board and is used for emitting infrared light signals to the polaroid-free display screen; the image sensor is electrically connected to the first circuit board and is used for receiving the infrared light signals reflected by the fingers on the polaroid-free display screen and forming fingerprint images according to the received infrared light signals. In the embodiment of the application, the fingerprint image can be formed by utilizing the infrared light signal capable of penetrating through the light shielding unit, so that the under-screen fingerprint identification scheme of the polaroid-free display screen can meet the requirements of users, and the popularization and application of the polaroid-free display screen are facilitated.

Description

Fingerprint module, display screen and electronic equipment

The present application claims priority from chinese patent office, application number 202320697954.7, chinese patent application entitled "a fingerprint module, display, and electronic device," filed on day 31, 03, 2013, the entire contents of which are incorporated herein by reference.

Technical Field

The application belongs to the field of electronic equipment, and particularly relates to a fingerprint module, a display screen and electronic equipment.

Background

With the rapid development of the electronic industry, the functions of electronic devices are becoming more and more powerful. In order to promote the intellectualization of electronic devices, fingerprint recognition technology has been widely used in recent years. Specifically, be equipped with the image sensor that is used for gathering fingerprint image in the fingerprint module, through gathering and comparing fingerprint image, can realize fingerprint unblock function.

However, with the popularization of a polarizer-less (poless) display screen, since a light shielding layer is provided in the polarizer-less display screen, the light shielding layer absorbs substantially all visible light. When the fingerprint module is applied under the display screen without the polaroid, the shading layer can block the light signals reflected by fingers above the display screen, so that the application of the fingerprint module under the screen is limited. Even if the shading layer is subjected to hole opening treatment, the area of the hole opening is limited due to the structural problems such as wiring and the like, and the transmittance is far lower than that of a conventional display screen. Therefore, the existing fingerprint identification scheme of the polaroid-free display screen is difficult to meet the user requirements.

Disclosure of Invention

The application aims at providing a fingerprint module, a display screen and electronic equipment to solve the problem that the fingerprint identification scheme of current no polaroid display screen hardly realizes.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, the application discloses a fingerprint module, the fingerprint module sets up in the below of no polaroid display screen, no polaroid display screen can pass through infrared light signal, the fingerprint module includes:

a first circuit board;

the infrared light-emitting piece is electrically connected to the first circuit board and is used for emitting infrared light signals to the polaroid-free display screen;

the image sensor is electrically connected to the first circuit board and is used for receiving the infrared light signals reflected by the fingers on the polaroid-free display screen and forming fingerprint images according to the received infrared light signals.

Optionally, the polarizer-free display screen includes: the light-shielding device comprises a substrate, a pixel layer, a light-filtering layer and a cover plate which are sequentially arranged, wherein the light-filtering layer comprises a plurality of light-filtering units, and a light-shielding unit capable of passing through infrared light signals is arranged between the light-filtering units.

Optionally, the fingerprint module further includes: the first infrared filter is arranged on one side, far away from the first circuit board, of the image sensor and is used for passing part or all of the infrared light signals.

Optionally, the band range of the infrared light signal emitted by the infrared light emitting element is: 720-1300nm.

Optionally, the band range of the infrared light signal that the first infrared filter can pass through is: 920-960nm.

Optionally, the band range of the infrared light signal that the first infrared filter can pass through is: 920-960nm.

Optionally, a first gap is formed between the first infrared filter and the image sensor;

alternatively, the first infrared filter is connected to the image sensor.

Optionally, the fingerprint module further comprises a light shielding member; the shading piece is connected to the first circuit board or the periphery side of the image sensor so as to prevent the infrared light signals emitted by the infrared light emitting piece from directly entering the image sensor;

or, the fingerprint module further comprises a lens assembly located above the image sensor, and the light shielding member is connected to one side, far away from the image sensor, of the lens assembly, so that infrared light signals emitted by the infrared light emitting member are prevented from directly entering the image sensor.

Optionally, the shade is set up around image sensor, and the height of shade is higher than image sensor, the top of shade is used for with the lower surface of no polaroid display screen supports.

Optionally, the first infrared filter is connected in the shading piece.

Optionally, the pixel layer includes a plurality of display pixels, and a pixel definition unit capable of passing the infrared light signal is disposed between the display pixels.

Optionally, the image sensor is electrically connected with the infrared light emitting element, and the image sensor is used for controlling the infrared light emitting element to emit the infrared light signal;

or, the fingerprint module further includes: the controller is electrically connected with the infrared luminous piece and is used for controlling the infrared luminous piece to emit the infrared light signals.

Optionally, the controller is electrically connected to the first circuit board.

Optionally, the first brightness of the infrared light signal emitted by the infrared light emitting element is inversely related to the second brightness of the ambient light signal.

In this embodiment of the application, owing to be provided with infrared light-emitting part on the fingerprint module, infrared light-emitting part can be to no polaroid display screen transmission infrared light signal, infrared light signal can pass the shading unit on the no polaroid display screen. The image sensor in the fingerprint module can receive the infrared light signals reflected by the fingers on the polaroid-free display screen and form fingerprint images according to the received infrared light signals so as to realize the function of fingerprint identification under the screen. Therefore, the fingerprint module is arranged below the polaroid-free display screen, and a fingerprint image can be formed by utilizing an infrared light signal capable of penetrating through the light shielding unit, so that the under-screen fingerprint identification scheme of the polaroid-free display screen can meet the requirements of users, and the popularization and the application of the polaroid-free display screen are facilitated.

In a second aspect, the present application also discloses a display screen, the display screen comprising: the pixel structure comprises a substrate, a pixel layer, a filter layer and a cover plate which are sequentially arranged; wherein,

the pixel layer comprises a plurality of display pixels and at least one infrared pixel, the infrared pixels are used for emitting infrared light signals, the infrared light signals sequentially pass through the cover plate, the filter layer, the pixel layer and the substrate after being reflected by fingers on the cover plate, so that infrared light signals carrying fingerprint information are obtained, and the infrared light signals carrying the fingerprint information are used for being received by an image sensor of the fingerprint module.

Optionally, the filter layer includes a plurality of filter units, and a light shielding unit capable of passing the infrared light signal is disposed between the filter units.

Optionally, the display pixel and the infrared pixel are arranged in the same layer, or the display pixel and the infrared pixel are arranged in different layers.

Optionally, in the case that the display pixels and the infrared pixels are arranged in the same layer, the plurality of display pixels are distributed in the pixel layer at intervals, at least part of the display pixels have a gap therebetween, and the infrared pixels are arranged in the gap.

Optionally, the filter layer is provided with an infrared filter unit at a position opposite to the infrared pixel.

Optionally, a pixel definition unit capable of passing the infrared light signal is disposed between the plurality of display pixels and at least one infrared pixel.

In a third aspect, the present application also discloses an electronic device, including: a polaroid-free display screen and a fingerprint module according to any one of the above; the fingerprint module is arranged below the polaroid-free display screen.

In this embodiment of the application, owing to be provided with infrared pixel in the pixel layer of display screen, infrared pixel can be used for transmitting infrared light signal, infrared light signal warp behind the finger reflection on the apron, loops through the apron the filter layer the pixel layer reaches the base plate obtains the infrared light signal that carries fingerprint information, the infrared light signal that carries fingerprint information is used for being received by the image sensor of fingerprint module and forms the fingerprint image, realizes the function of fingerprint identification under the screen. Under the condition that the display screen is a polaroid-free display screen, as infrared light signals sent by the infrared pixels can pass through the shading unit of the polaroid-free display screen, the under-screen fingerprint identification scheme of the polaroid-free display screen can meet the requirements of users, and the popularization and the application of the polaroid-free display screen are facilitated.

In a fourth aspect, the present application further discloses an electronic device, which is characterized in that the electronic device includes: a fingerprint module and any one of the above display screens; the fingerprint module is arranged below the display screen.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a fingerprint module according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a display screen according to an embodiment of the present application;

FIG. 3 is a flowchart illustrating a control method of a fingerprint module according to an embodiment of the application;

reference numerals: 100-fingerprint module, 10-first circuit board, 11-infrared light-emitting part, 12-image sensor, 13-adhesive layer, 14-first infrared light filter, 15-light-shielding part, 200-no polaroid display screen, 20-base plate, 21-pixel layer, 211-display pixel, 212-infrared pixel, 22-filter layer, 221-filter, 222-black matrix, 223-infrared filter unit, 23-cover plate, 24-pixel encapsulation layer, 25-touch layer, 26-flat layer and 300-finger.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In this embodiment of the application, the fingerprint module can be used for carrying out fingerprint identification. Fingerprint recognition generally includes optical fingerprint recognition, capacitive fingerprint recognition, and ultrasonic fingerprint recognition. With the rise of the full screen technology, the fingerprint module can be arranged in a local area or a whole area below the display screen, so that Under-screen (render-display) optical fingerprint identification is formed; alternatively, part or all of the optical fingerprint module may be integrated into the display screen of the electronic device, so as to form an In-screen (In-display) optical fingerprint. The display screen may be an organic light emitting diode (Organic Light Emitting Diode, OLED) display screen or a liquid crystal display screen (Liquid Crystal Display, LCD) or the like. The fingerprint identification method generally comprises the steps of fingerprint image acquisition, preprocessing, feature extraction, feature matching and the like. Some or all of the above steps may be implemented by conventional Computer Vision (CV) algorithms, or by artificial intelligence (Artificial Intelligence, AI) based deep learning algorithms. The fingerprint identification technology can be applied to portable or mobile terminals such as smart phones, tablet computers and game devices, and other electronic devices such as intelligent door locks, automobiles and bank automatic teller machines, and is used for fingerprint unlocking, fingerprint payment, fingerprint attendance checking, identity authentication and the like.

The embodiment of the application provides a fingerprint module, the fingerprint module can be used for electronic equipment, electronic equipment can include the display screen, the fingerprint module can set up the below of display screen. Specifically, the display screen may be a polarizer-free display screen, and the electronic device may include, but is not limited to, at least one of a mobile phone, a tablet computer, and a wearable device.

Referring to fig. 1, a schematic structural diagram of a fingerprint module according to an embodiment of the present application is shown, where the fingerprint module shown in fig. 1 may be disposed below a display screen without a polarizer, and the display screen without a polarizer may be capable of implementing a function of fingerprint identification under the screen by using infrared light signals. Specifically, the non-polaroid technology (Pol-less) is to remove the polaroid, replace the polaroid with black and black matrixes of light absorbing materials, or block the reflected light of the screen as much as possible through a color film, so that the contrast of the display screen is improved, and the problem of screen reflection is solved.

As shown in fig. 1, the fingerprint module may specifically include: a first circuit board 10; the infrared light-emitting piece 11, the infrared light-emitting piece 11 is electrically connected to the first circuit board 10, and the infrared light-emitting piece 11 can be used for emitting infrared light signals to the polarizer-free display screen 200; the image sensor 12 is electrically connected to the first circuit board 10, and the image sensor 12 may be configured to receive the infrared light signal reflected by the finger 300 on the polarizer-less display screen 200 and form a fingerprint image according to the received infrared light signal.

In a specific application, the polarizer-free display screen may include a substrate, a pixel layer, a filter layer and a cover plate that are sequentially disposed, the filter layer may include a plurality of filter units, and a light shielding unit capable of passing through the infrared light signal is disposed between the filter units. Because the fingerprint module is provided with the infrared light emitting part 11, the infrared light emitting part 11 can emit infrared light signals to the polaroid-free display screen 200, and the infrared light signals can pass through the shading units on the polaroid-free display screen 200. The image sensor 12 in the fingerprint module can receive the infrared light signal reflected by the finger 300 on the polarizer-free display screen 200, and form a fingerprint image according to the received infrared light signal, so as to realize the function of fingerprint identification under the screen. Thus, by arranging the fingerprint module below the polaroid-free display screen 200, a fingerprint image can be formed by utilizing the infrared light signal capable of passing through the light shielding unit, so that the under-screen fingerprint identification scheme of the polaroid-free display screen 200 can meet the requirements of users, and the popularization and application of the polaroid-free display screen 200 are facilitated.

In some alternative embodiments of the present application, the pixel layer may include a plurality of display pixels, which may include, but are not limited to, any one or more of a red display pixel, a green display pixel, and a blue display pixel. And a pixel definition unit capable of passing the infrared light signal is arranged between the display pixels. Specifically, the display pixel may be used to implement a display function, and the pixel defining unit may be used to pass the infrared light signal, so that the infrared light signal emitted by the infrared light emitting element 11 passes through the pixel defining layer to reach the polarizer-free display screen 200, and the infrared light signal reflected by the finger 300 passes through the pixel defining layer to reach the image sensor 12.

In particular applications, the first circuit board 10 may be used to support the image sensor 12 and electrically connect the first circuit board 10 to other electronic components in the electronic device. By way of example, the first circuit board 10 may include, but is not limited to, at least one of a printed circuit board, a flexible circuit board.

Specifically, the fingerprint module may further include an adhesive layer 13, the adhesive layer 13 is disposed between the image sensor 12 and the first circuit board 10, and the image sensor 12 may be connected to the first circuit board 10 through the adhesive layer 13. For example, the material of the adhesive layer 13 may be optical adhesive or conductive adhesive, and the specific material of the adhesive layer 13 in the embodiment of the present application may not be limited.

Specifically, the image sensor 12 is used as a main body of the fingerprint module, and can receive the infrared light signal reflected by the finger 300 of the user and convert the infrared light signal into an electrical signal carrying fingerprint information, so as to form a fingerprint image. In this embodiment, since the infrared light signal can pass through the light shielding unit on the polarizer-free display screen 200, the infrared light signal emitted by the infrared light emitting element 11 can pass through the light shielding unit to reach the upper surface of the polarizer-free display screen 200 and be reflected by the finger 300 of the user. Similarly, infrared light signals reflected back through the user's finger 300 may also be received by the image sensor 12 through the light shield to form a fingerprint image. Thus, the operation of opening the hole in the light shielding unit to transmit light is avoided.

Moreover, in the embodiment of the application, by integrating the infrared light emitting piece 11 capable of generating infrared light signals on the fingerprint module, when the finger 300 of the user contacts the upper surface of the polaroid-free display screen 200, fingerprint identification can be started without lighting the polaroid-free display screen 200, so that frequent lighting of the polaroid-free display screen 200 is avoided, and the service life of the polaroid-free display screen 200 is greatly prolonged. Moreover, the infrared light signal is invisible to naked eyes, so that the infrared light signal is not dazzling in a dark light environment, and the eyes of a user can be protected.

In some alternative embodiments of the present application, the image sensor 12 is electrically connected to the infrared light emitting element 11, and the image sensor 12 may be configured to control the infrared light emitting element 11 to emit the infrared light signal, so as to obtain the fingerprint image through the infrared light signal. In a specific application, the image sensor 12 controls the infrared light emitting element 11 to emit the infrared light signal, so that an additional control component can be avoided to control the infrared light emitting element 11, and the structure of the fingerprint module can be simplified.

In other optional embodiments of the present application, the fingerprint module may further include: the controller is electrically connected with the infrared luminous element 11, and the controller can be used for controlling the infrared luminous element 11 to emit the infrared light signals. In a specific application, the infrared light emitting element 11 is controlled to emit the infrared light signal by arranging an additional controller, so that the control precision of the infrared light emitting element 11 can be greatly improved.

Specifically, the controller may be electrically connected to a main control unit in the electronic device, and the main control unit drives the controller to transmit a control signal to the infrared light emitting element 11; or the controller may be directly electrically connected to the image sensor 12, and the controller is driven by the image sensor 12 to emit a control signal to the infrared light emitting member 11.

It should be noted that, in practical applications, a person skilled in the art may select the image sensor 12 or the additional controller to control the infrared light emitting element 11 to emit the infrared light signal according to actual needs, and the control manner of the infrared light emitting element 11 is not specifically limited in this embodiment of the present application.

Alternatively, in the case of controlling the infrared light emitting member 11 by an additional controller, the controller may be connected to the first circuit board 10. In this way, on the one hand, a fixed mounting of the control element is possible, and on the other hand, an electrical connection with the infrared light-emitting element 11 can also be achieved by means of wiring on the first circuit board 10.

In some alternative embodiments of the present application, the first brightness of the infrared light signal emitted by the infrared light emitting element 11 is inversely related to the second brightness of the ambient light signal. In practical applications, the higher the first brightness of the ambient light signal, the more the amount of ambient light signal reflected to the fingerprint module by the finger 300 of the user. Thus, even if the first brightness of the infrared light signal emitted by the infrared light emitting element is low, the ambient light signal can still form a more complete fingerprint image. Accordingly, in the case where the second brightness of the ambient light signal is higher, the first brightness of the infrared light signal emitted from the infrared light emitting member 11 may be lower to reduce the power consumption of the infrared light emitting member 11. Conversely, the lower the first brightness of the ambient light signal, the less the amount of ambient light signal reflected by the finger 300 of the user to the fingerprint module is, and it is more difficult to form a more complete fingerprint image by passing through the ambient light signal. Therefore, the lower the second brightness of the ambient light signal, the higher the first brightness of the infrared light signal emitted by the infrared light emitting element 11 needs to be to form a complete fingerprint image.

In some optional embodiments of the present application, the fingerprint module may further include: the first infrared filter 14 is disposed on the side, far away from the first circuit board 10, of the image sensor 12, and the first infrared filter 14 may be configured to pass a part or all of the infrared light signals and filter out the light signals other than the infrared light signals, so as to avoid that other stray light signals other than the infrared light signals enter the image sensor 12 to affect the imaging of the fingerprint image. The fingerprint module is favorable for acquiring fingerprint images with higher quality, so that the accuracy of fingerprint recognition by the fingerprint module can be further improved.

Optionally, the infrared light signal emitted by the infrared light emitting element 11 has a wavelength band ranging from: 720-1300nm, that is, the band range of the infrared light signal emitted by the infrared light emitting element 11 is larger, the band range of the infrared light signal emitted to the unbiased sheet display screen and reflected by the finger on the unbiased sheet display screen is increased, and the image sensor 12 can obtain a more comprehensive fingerprint image.

Further, the band range of the infrared light signal emitted by the infrared light emitting element 11 is: 780-1200nm. The infrared light signal with the wave band range of 780-1200nm is more beneficial to obtaining accurate fingerprint images and improving the accuracy of fingerprint identification.

Alternatively, the band range of the infrared light signal that the first infrared filter 14 can pass is: 920-960nm, that is, the first infrared filter 14 only allows the infrared light signal with the wave band range of 920-960nm to pass through, and filters the infrared light signal with the wave band range of 920-960nm, so as to avoid the influence of the infrared light signal with the wave band range of 920-960nm entering the image sensor 12 to the imaging of the fingerprint image, and be favorable for obtaining the fingerprint image with higher quality.

Optionally, a first gap is formed between the first infrared filter 14 and the image sensor 12, and the height of the first gap may be set according to practical situations, so as to improve the layout flexibility of the first infrared filter 14. Alternatively, the first infrared filter 14 is directly connected to the top of the image sensor 12, so as to reduce the overall height of the fingerprint module, which is beneficial to the light and thin design of the fingerprint module.

In fig. 1, only the first gap between the first infrared filter 14 and the image sensor 12 is shown. In practical applications, a person skilled in the art may further directly connect the first infrared filter 14 above the image sensor 12 according to actual needs, and the relative position between the first infrared filter 14 and the image sensor 12 is not specifically limited in this embodiment.

As shown in fig. 1, the fingerprint module may further include a light shielding member 15, where the light shielding member 15 may be used for shielding light, so as to prevent the optical signal of any wavelength band from directly entering the image sensor 12 without being reflected by a finger, so as to affect the imaging of the fingerprint image. For example, light signals reflected back inside or at the bottom of the display screen scatter light signals entering the image sensor 12 below the display screen.

As shown in fig. 1, a light shielding member 15 (bottom shown in fig. 1) is connected to the first circuit board 10 or the periphery of the image sensor 12, so as to prevent the infrared light signal emitted by the infrared light emitting member 11 from directly entering the image sensor 12 from the periphery of the image sensor 12 to affect the imaging of the fingerprint image. Thus, the image sensor 12 is facilitated to form a fingerprint image with higher quality, so that the accuracy of fingerprint identification performed by the fingerprint module can be further improved. In practical applications, the arrangement of the light shielding member 15 shown in fig. 1 is suitable for an ultra-thin fingerprint module.

Optionally, the fingerprint module may further include a lens assembly above the image sensor 12, and a light shielding member 15 (bottom shown in fig. 1) is connected to a side of the lens assembly away from the image sensor 12, so as to prevent the infrared light signal emitted by the infrared light emitting member from directly entering the image sensor 12 from above the image sensor 12 to affect the imaging of the fingerprint image. In practical applications, the manner of disposing the light shielding member 12 above the lens assembly is suitable for the lens fingerprint module.

In some alternative embodiments of the present application, a light shield 15 may be provided around the image sensor 12 to prevent infrared light signals from entering the image sensor 12 from the side of the image sensor 12. And the height of the light shielding member 15 is higher than that of the image sensor 12, and the top of the light shielding member 15 may be abutted against the lower surface of the polarizer-free display screen 200. Due to the shielding effect of the shielding member 15, the infrared light signal can only enter the image sensor 12 from the polaroid-free display screen 200 above the image sensor 12, so that the influence of the infrared light signal emitted by the infrared light emitting member 11 directly entering the image sensor 12 on the imaging of the fingerprint image can be further avoided.

It should be noted that, in practical application, the shape of the light shielding member 15 may be adapted to the shape of the image sensor 12. For example, in the case where the shape of the image sensor 12 is a circular shape, the shape of the light shielding member 15 may be a cylindrical shape. Alternatively, the light shielding member 15 may have a horn shape, that is, a caliber near one end of the screen (i.e., the polarizer-less display screen 200) is larger than a caliber near one end of the image sensor 12.

Alternatively, the first infrared filter 14 is connected to the light shielding member 15, and the light shielding member 15 may be used to support and fix the first infrared filter 14.

For example, the first infrared filter 14 may be connected to the light shielding member 15 by bonding, clamping, or other connection methods, and the connection method of the first infrared filter 14 to the light shielding member 15 in the embodiment of the present application is not specifically limited.

Optionally, the material of the light shielding member 15 includes one of foam and rubber. The foam, rubber and other materials can be used for shielding infrared light signals and have certain elasticity. In this way, in the case where the material of the light shielding member 15 is foam or rubber, it is not only used to shield infrared light signals, but also prevent infrared light signals emitted from the infrared light emitting member 11 from directly entering the image sensor 12 from the side of the image sensor 12. Furthermore, the light shielding member 15 can also realize a buffering effect through elastic deformation, and damage to the polarizer-free display screen 200 can be avoided in the case that the fingerprint module falls.

Specifically, the foam may be black shading foam, and the rubber may be black shading rubber, which is not limited in this embodiment of the present application.

Alternatively, the infrared light emitting member 11 may include an infrared light emitter, which may emit an infrared light signal toward the polarizer-free display screen 200 above the fingerprint module. For example, the number of the infrared light emitters may be set according to actual situations. For example, the number of the infrared light emitters may be 1, 2, 4, or the like, and when the number of the infrared light emitters is plural, plural infrared light emitters may be disposed at intervals around the circumference side of the image sensor 12. The number and positions of the infrared light emitters are not particularly limited in the embodiments of the present application.

In summary, the fingerprint module according to the embodiment of the application may at least include the following advantages:

in this embodiment of the application, owing to be provided with infrared light-emitting part on the fingerprint module, infrared light-emitting part can be to no polaroid display screen transmission infrared light signal, infrared light signal can pass the shading unit on the no polaroid display screen. The image sensor in the fingerprint module can receive the infrared light signals reflected by the fingers on the polaroid-free display screen and form fingerprint images according to the received infrared light signals so as to realize the function of fingerprint identification under the screen. Therefore, the fingerprint module is arranged below the polaroid-free display screen, and a fingerprint image can be formed by utilizing an infrared light signal capable of penetrating through the light shielding unit, so that the under-screen fingerprint identification scheme of the polaroid-free display screen can meet the requirements of users, and the popularization and the application of the polaroid-free display screen are facilitated.

The embodiment of the application also provides a display screen, which may include a polaroid-free display screen, an ordinary Organic Light-Emitting Diode (OLED) display screen, and the like.

Referring to fig. 2, a schematic structural diagram of a display screen according to an embodiment of the present application is shown. As shown in fig. 2, the display screen may specifically include: a substrate 20, a pixel layer 21, a filter layer 22, and a cover plate 23 disposed in this order; the pixel layer 21 may include a plurality of display pixels 211 and at least one infrared pixel 212, where the infrared pixel 212 may be configured to emit an infrared light signal, where the infrared light signal, after being reflected by a finger on the cover plate 23, sequentially passes through the cover plate 23, the filter layer 22, the pixel layer 21 and the substrate 20 to obtain an infrared light signal carrying fingerprint information, where the infrared light signal carrying fingerprint information is used to be received by an image sensor of the fingerprint module 100, so that the image sensor forms a fingerprint image according to the received infrared light signal.

In this embodiment of the present application, since the infrared pixel 212 is disposed in the pixel layer 21 of the display screen, the infrared pixel 212 may emit an infrared light signal, after the infrared light signal is reflected by a finger on the cover plate 23, the infrared light signal sequentially passes through the cover plate 23, the filter layer 22, the pixel layer 21 and the substrate 20, so as to obtain an infrared light signal carrying fingerprint information, where the infrared light signal carrying fingerprint information is used to be received by the image sensor of the fingerprint module 100, so that the image sensor forms a fingerprint image according to the received infrared light signal, and the function of fingerprint identification under the screen is implemented. Under the condition that the display screen is a polaroid-free display screen, as infrared light signals emitted by the infrared pixels 212 can pass through the shading units of the polaroid-free display screen, the under-screen fingerprint identification scheme of the polaroid-free display screen can meet the requirements of users, and the popularization and the application of the polaroid-free display screen are facilitated.

Specifically, the substrate 20 may be used as a structural body of the display screen to support the pixel layer 21, the filter layer 22, the cover plate 23, and the like. Typically, the substrate 20 may be made of glass. The pixel layer 21 may include a plurality of display pixels 211 distributed in an array. In particular, the display pixels 211 may include, but are not limited to, any one or more of red display pixels, green display pixels, and blue display pixels, and the display pixels 211 may be used to implement a display function. The filter layer 22 may be used to filter stray light and improve the display accuracy of the display screen. The filter layer 22 may be provided with a plurality of filter units 221 spaced apart, and the filter units 221 may include at least one of a red filter unit, a green filter unit, and a blue filter unit. The red filter unit can transmit red light signals and filter other light signals except the red light signals, the green filter unit can transmit green light signals and filter other light signals except the green light signals, and the blue filter unit can transmit blue light signals and filter other light signals except the blue light signals. In addition, a light shielding unit 222 capable of passing through the infrared light signal is arranged between the light filtering units 211, and the light shielding unit 222 can be used for shielding and preventing reflection so as to prevent the internal structure of the display screen from being seen from the outside of the display screen, and improve the appearance aesthetic property of the display screen. The cover plate 23 may be used to protect the display screen from external forces to the pixel layer 21 and the filter layer 22 of the display screen. Typically, the cover plate 23 may be made of glass, transparent plastic, or the like, which is capable of transmitting light.

In this embodiment, since the pixel layer 21 is further provided with the infrared pixel 212, the infrared pixel 212 can be used for emitting an infrared light signal, and after the infrared light signal is reflected by the finger 300 on the cover plate 23, the infrared light signal can be projected to the fingerprint module 100 to form a fingerprint image, so as to realize the function of fingerprint identification under the screen.

In some alternative embodiments of the present application, the display pixels 211 and the infrared pixels 212 are arranged in the same layer, so as to reduce the overall height of the pixel layer 21, which is beneficial to the light and thin design of the display screen. Alternatively, the display pixels 211 and the infrared pixels 212 are arranged in different layers to facilitate a flexible layout of the display pixels 211 and the infrared pixels 212.

It should be noted that the drawings in the embodiments of the present application show a case where the display pixel 211 and the infrared pixel 212 are arranged in the same layer. In practical applications, the person skilled in the art may further set the infrared pixel 212 and the display pixel 211 in different layers according to actual needs, and the positional relationship between the infrared pixel 212 and the display pixel 211 in the embodiment of the present application is not specifically limited.

As shown in fig. 2, in the case where the display pixels 211 and the infrared pixels 212 are arranged in the same layer, the plurality of display pixels 211 are distributed at intervals in the pixel layer 21, and a gap is formed between at least part of the display pixels 211, and the infrared pixels 212 are arranged in the gap.

In a specific application, by distributing the plurality of display pixels 211 at intervals, a pixel matrix with an array distribution can be obtained, so as to realize the display function. By disposing the infrared pixels 212 in the gaps between the display pixels 211, the same layer arrangement between the infrared pixels 212 and the display pixels 211 can be realized, the overall height of the pixel layer 21 is reduced, and the light and thin design of the display screen is facilitated.

In some alternative embodiments of the present application, the filter layer 22 is provided with an infrared filter unit 223 at a position opposite to the infrared pixels 212. The infrared filter unit 223 may be configured to pass through the infrared light signal and filter the light signal other than the infrared light signal, so as to prevent other stray light signals other than the infrared light signal from entering the fingerprint module 100 below the display screen to affect the imaging of the fingerprint image. The fingerprint image with higher quality is obtained, so that the accuracy of fingerprint identification performed by the fingerprint module 100 can be further improved.

In this embodiment, the pixel layer is configured to pass the infrared light signal, so that the infrared light signal emitted by the infrared light emitting element 11 passes through the pixel layer to the surface of the display screen, and the infrared light signal reflected by the finger 300 passes through the pixel layer to reach the image sensor 12, so as to form a fingerprint image.

In this embodiment, a pixel defining unit capable of passing the infrared light signal is disposed between the plurality of display pixels and at least one infrared pixel, so that the infrared light signal emitted by the infrared light emitting element 11 reaches the surface of the display screen through the pixel defining layer, and the infrared light signal reflected by the finger 300 reaches the image sensor 12 through the pixel defining layer.

In practical application, the pixel definition unit capable of passing through the infrared light signals is arranged between the display pixels and the infrared pixel units, so that the quantity of the infrared light signals passing through the pixel layer can be further improved, a more stable and complete fingerprint image can be formed, and the fingerprint identification precision is improved.

As shown in fig. 2, the display screen may further include a pixel encapsulation layer 24, a touch layer 25, and a planarization layer 26. A pixel encapsulation layer 24 may be disposed over the pixel layer 21, and the pixel encapsulation layer 24 may be used to encapsulate the infrared pixels 212 and the display pixels 211 on the pixel layer 21 to protect the infrared pixels 212 and the display pixels 211. The touch layer 25 may be disposed above the pixel packaging layer 24, and the touch layer 25 may be used for arranging touch traces to implement the touch function of the display screen. A planarization layer 26 may be disposed between the filter layer 22 and the cover plate 23, and the planarization layer 26 may form a planar surface over the filter layer 22 to facilitate the placement of the cover plate 23 over the filter layer 22.

In summary, the display screen according to the embodiments of the present application may at least include the following advantages:

in this embodiment of the application, owing to be provided with infrared pixel in the pixel layer of display screen, infrared light signal warp behind the finger reflection on the apron, loops through the apron the filter layer the pixel layer reaches the base plate obtains the infrared light signal that carries fingerprint information, the infrared light signal that carries fingerprint information is used for receiving by the image sensor of fingerprint module and forms the fingerprint image, realizes the function of fingerprint identification under the screen. Under the condition that the display screen is a polaroid-free display screen, as infrared light signals sent by the infrared pixels can pass through the shading unit of the polaroid-free display screen, the under-screen fingerprint identification scheme of the polaroid-free display screen can meet the requirements of users, and the popularization and the application of the polaroid-free display screen are facilitated.

The embodiment of the application also provides a control method of the fingerprint module, which can be particularly used for the fingerprint module.

Referring to fig. 3, a step flowchart of a control method of a fingerprint module according to an embodiment of the present application is shown, and as shown in fig. 3, the control method may specifically include the following steps:

Step 301: a first brightness of the ambient light signal or a first light signal energy is acquired.

In this embodiment of the present application, a detection sensor may be disposed in the fingerprint module, or a detection sensor in an electronic device may be used to obtain, by using the detection sensor, first brightness of an ambient light signal or first light signal energy of the ambient light signal. Or, an image is acquired through an image sensor in the fingerprint module, and the image is processed through a main control unit in the electronic equipment to obtain the first brightness or the first optical signal energy of the environment optical signal. The method for acquiring the first brightness and the first optical signal energy of the ambient optical signal is not specifically limited in this embodiment.

In practical applications, the first brightness of the ambient light signal and the first light signal energy are positively correlated, i.e. the larger the first brightness of the ambient light, the larger the first light signal energy of the ambient light signal.

Step 302: and controlling the infrared light emitting part of the fingerprint module to emit an infrared light signal based on the first brightness or the first light signal energy, wherein the second brightness of the infrared light signal corresponds to the first brightness or the first light signal energy of the environment light signal.

In this embodiment of the present application, based on the first brightness or the first light signal energy, the infrared light emitting element of the fingerprint module may be controlled to emit an infrared light signal, where the second brightness of the infrared light signal corresponds to the first brightness of the ambient light signal. In practical applications, since both the ambient light signal and the infrared light signal may be used to form the fingerprint image, the second brightness of the infrared light signal may be adjusted by the first brightness of the ambient light signal or the first light signal energy, i.e. the second brightness of the infrared light signal may depend on the first brightness of the ambient light or the first light signal energy. Therefore, by controlling the infrared light emitting member to emit an infrared light signal of a second brightness corresponding to the first brightness of the ambient light signal, a fingerprint image with better quality can be obtained under the condition of an external imaging light source with proper brightness, and the power consumption of the infrared light emitting member is reduced.

Optionally, the second luminance is inversely related to the first luminance. In practical applications, the higher the first brightness of the ambient light signal, the more the amount of ambient light signal reflected to the fingerprint module by the finger 300 of the user. Thus, even if the first brightness of the infrared light signal emitted by the infrared light emitting element is low, the ambient light signal can still form a fingerprint image with better quality. Accordingly, in the case where the second brightness of the ambient light signal is higher, the first brightness of the infrared light signal emitted from the infrared light emitting member 11 may be lower to reduce the power consumption of the infrared light emitting member 11. Conversely, the lower the first brightness of the ambient light signal, the less the amount of ambient light signal reflected by the finger 300 of the user to the fingerprint module is, and it is more difficult to form a more complete fingerprint image by passing through the ambient light signal. Therefore, the lower the second brightness of the ambient light signal, the higher the first brightness of the infrared light signal emitted by the infrared light emitting element 11 needs to be to form a fingerprint image with better quality.

In a specific application, the second brightness is also inversely related to the first light signal energy, and the higher the first light signal energy is, the lower the second brightness of the infrared light is, and the lower the first light signal energy is, the higher the second brightness of the infrared light is. Based on the first brightness or the first light signal energy, the infrared light emitting element of the fingerprint module is controlled to emit an infrared light signal, which can be adjusted according to increasing or decreasing the first brightness of the infrared light signal, or can be quantized to a specific brightness value (which will be described in detail below).

In some optional embodiments of the present application, the step of acquiring the first brightness or the first optical signal energy of the ambient optical signal in step 301 may specifically include the following sub-steps:

substep S11: under the condition that the infrared luminous element is closed, an environmental image is acquired through an image sensor of the fingerprint module.

In this embodiment of the present application, an environmental image may be acquired by an image sensor of the fingerprint module under the condition that the infrared light emitting element is turned off, so that the first brightness or the first light signal energy of the environmental light signal may be acquired by the environmental image.

In a specific application, the environment image is collected again under the condition that the infrared light emitting element is closed, so that the influence of infrared light signals emitted by the infrared light emitting element on the environment image can be avoided, and the accuracy of the environment image is improved. And the image sensor is used for collecting the environment image and acquiring the first brightness or the first optical signal energy of the environment optical signal according to the environment image, so that the condition that a detection sensor is additionally arranged to acquire the first brightness or the first optical signal energy of the environment optical signal can be avoided, and the structure of the fingerprint module is simplified.

Substep S12: and acquiring first brightness or first light signal energy of the ambient light signal in a preset exposure time period based on the ambient image.

In this embodiment of the present application, the image sensor may collect an environmental image of a small time window around t0 (e.g. 5 ms), and calculate, according to an image code value a of the environmental image, a first optical signal energy a provided by an environmental optical signal within a preset exposure time t, where the first optical signal energy a=t/(t 0×a).

In a specific application, since the first luminance of the ambient light signal and the first light signal energy are positively correlated, the first light signal energy may be converted into the first luminance, i.e. the first light signal energy is multiplied by a proportional coefficient to obtain the first luminance.

In some optional embodiments of the present application, the step of controlling the infrared light emitting element to emit the infrared light signal in step 302 based on the first light signal energy may specifically include the following substeps:

substep S21: and obtaining second optical signal energy of the infrared light signal according to the first optical signal energy and the target optical signal energy.

In this embodiment, the target optical signal energy required for forming a complete fingerprint image may be denoted by B, where typically b=max×80%, and max is the maximum optical signal energy required for forming a fingerprint image of a target quality. The energy of the second light signal provided by the infrared light signal emitted by the infrared light emitting element may be denoted as C, c=b-ase:Sub>A. Thus, in the case where the target disc optical signal energy C is known and the first energy signal a is acquired, the second optical signal energy C of the infrared optical signal can be obtained.

Substep S22: and obtaining the second brightness of the infrared light signal according to the second light signal energy.

In practical applications, the second brightness I of the infrared light emitting element is proportional to the second light signal energy C within the preset exposure time t, and the proportionality coefficient σ is calibrated and preconfigured in the image sensor, so as to calculate the second brightness i=c×σ of the infrared light emitting element.

Substep S23: the infrared luminous element is controlled to emit infrared light signals with second brightness.

In this embodiment of the present application, after the second brightness of the infrared light signal is determined, the infrared light emitting element may be controlled to emit the infrared light signal with the second brightness, so as to obtain a complete fingerprint image and reduce power consumption of the infrared light emitting element.

In summary, the control method of the fingerprint module set in the embodiment of the application at least may include the following advantages:

in this embodiment of the present application, by acquiring the first luminance or the first light signal energy of the ambient light signal, based on the first luminance or the first light signal energy, the infrared light emitting element of the fingerprint module is controlled to emit an infrared light signal, and the second luminance of the infrared light signal corresponds to the first luminance of the ambient light signal. In practical applications, since both the ambient light signal and the infrared light signal may be used to form the fingerprint image, the second brightness of the infrared light signal may be adjusted by the first brightness of the ambient light signal or the first light signal energy, i.e. the second brightness of the infrared light signal may depend on the first brightness of the ambient light or the first light signal energy. Therefore, by controlling the infrared light emitting member to emit an infrared light signal of a second brightness corresponding to the first brightness of the ambient light signal, a fingerprint image with better quality is obtained under the condition of an external imaging light source with proper brightness, and the power consumption of the infrared light emitting member is reduced.

The embodiment of the application also provides electronic equipment, which specifically can comprise the fingerprint module set in any one of the embodiments of the polaroid-free display screen; the fingerprint module is arranged below the polaroid-free display screen.

It should be noted that, in the embodiment of the present application, the structure of the fingerprint module is the same as that of the fingerprint module in each embodiment, and the beneficial effects thereof are also similar, and are not described herein.

The embodiment of the application also provides electronic equipment, which can specifically comprise a fingerprint module and the display screen in any embodiment; the fingerprint module is arranged below the display screen.

It should be noted that in the embodiment of the present application, the structure of the display screen is the same as that of the display screen in the above embodiments, and the beneficial effects thereof are also similar, and are not repeated herein.

The embodiment of the application also provides electronic equipment, which comprises a memory, a processor and a computer program stored on the memory, wherein the processor executes the computer program to realize the control method of the fingerprint module.

The embodiment of the application also provides a computer readable storage medium, on which a computer program/instruction is stored, which when executed by a processor, implements the control method of the fingerprint module set described in any one of the above.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (22)

1. The utility model provides a fingerprint module, its characterized in that, fingerprint module sets up in the below of no polaroid display screen, no polaroid display screen can pass through infrared light signal, fingerprint module includes:

A first circuit board;

the infrared light-emitting piece is electrically connected to the first circuit board and is used for emitting infrared light signals to the polaroid-free display screen;

the image sensor is electrically connected to the first circuit board and is used for receiving the infrared light signals reflected by the fingers on the polaroid-free display screen and forming fingerprint images according to the received infrared light signals.

2. The fingerprint module of claim 1, wherein the polarizer-free display screen comprises: the light-shielding device comprises a substrate, a pixel layer, a light-filtering layer and a cover plate which are sequentially arranged, wherein the light-filtering layer comprises a plurality of light-filtering units, and a light-shielding unit capable of passing through infrared light signals is arranged between the light-filtering units.

3. The fingerprint module of claim 1, wherein the fingerprint module further comprises: the first infrared filter is arranged on one side, far away from the first circuit board, of the image sensor and is used for passing part or all of the infrared light signals.

4. A fingerprint module according to any one of claims 1 to 3, wherein the infrared light signal emitted by the infrared light emitting element has a wavelength band ranging from: 720-1300nm.

5. The fingerprint module of claim 4, wherein the infrared light signal emitted by the infrared light emitting element has a band range of: 780-1200nm.

6. The fingerprint module of claim 3, wherein the band range of the infrared light signal that the first infrared filter can pass through is: 920-960nm.

7. The fingerprint module of claim 3, wherein a first gap is provided between the first infrared filter and the image sensor;

alternatively, the first infrared filter is connected to the image sensor.

8. The fingerprint module of claim 7, wherein the fingerprint module further comprises a light shield; the shading piece is connected to the first circuit board or the periphery side of the image sensor so as to prevent the infrared light signals emitted by the infrared light emitting piece from directly entering the image sensor;

or, the fingerprint module further comprises a lens assembly located above the image sensor, and the light shielding member is connected to one side, far away from the image sensor, of the lens assembly, so that infrared light signals emitted by the infrared light emitting member are prevented from directly entering the image sensor.

9. The fingerprint module of claim 8, wherein the light shielding member is disposed around the image sensor, and a top of the light shielding member is configured to abut against a lower surface of the polarizer-free display screen.

10. The fingerprint module of claim 8, wherein the first infrared filter is connected to the light shielding member.

11. The fingerprint module of claim 2, wherein the pixel layer includes a plurality of display pixels, and pixel definition units capable of passing the infrared light signals are disposed between the display pixels.

12. The fingerprint module of any one of claims 1-3 and 6-11,

the image sensor is electrically connected with the infrared luminous element and is used for controlling the infrared luminous element to emit the infrared light signal;

or, the fingerprint module further includes: the controller is electrically connected with the infrared luminous piece and is used for controlling the infrared luminous piece to emit the infrared light signals.

13. The fingerprint module of claim 12, wherein the controller is electrically connected to the first circuit board.

14. The fingerprint module of any one of claims 1-3, 6-11, wherein a first intensity of the infrared light signal emitted by the infrared light emitter is inversely related to a second intensity of an ambient light signal.

15. A display screen, the display screen comprising: the pixel structure comprises a substrate, a pixel layer, a filter layer and a cover plate which are sequentially arranged; wherein,

the pixel layer comprises a plurality of display pixels and at least one infrared pixel, the infrared pixels are used for emitting infrared light signals, the infrared light signals sequentially pass through the cover plate, the filter layer, the pixel layer and the substrate after being reflected by fingers on the cover plate, so that infrared light signals carrying fingerprint information are obtained, and the infrared light signals carrying the fingerprint information are used for being received by an image sensor of the fingerprint module.

16. The display screen of claim 15, wherein the filter layer comprises a plurality of filter units, and a light shielding unit capable of passing the infrared light signal is disposed between the filter units.

17. The display screen of claim 15, wherein the display pixels and the infrared pixels are arranged in a same layer or wherein the display pixels and the infrared pixels are arranged in different layers.

18. The display screen of claim 17, wherein the plurality of display pixels are spaced apart at the pixel layer with a gap between at least a portion of the display pixels and the infrared pixels are disposed at the gap.

19. The display screen of claim 15, wherein the filter layer is provided with an infrared filter unit at a position opposite to the infrared pixel.

20. A display screen according to any one of claims 15 to 19, wherein a pixel definition unit capable of passing the infrared light signal is provided between the plurality of display pixels and at least one infrared pixel.

21. An electronic device, the electronic device comprising: a polarizer-free display screen and a fingerprint module according to any one of claims 1 to 14; the fingerprint module is arranged below the polaroid-free display screen.

22. An electronic device, the electronic device comprising: a fingerprint module and a display screen according to any one of claims 15 to 20; the fingerprint module is arranged below the display screen.