CN109643377A - Fingerprint identification device and electronic equipment - Google Patents
Fingerprint identification device and electronic equipment Download PDFInfo
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- CN109643377A CN109643377A CN201880002297.1A CN201880002297A CN109643377A CN 109643377 A CN109643377 A CN 109643377A CN 201880002297 A CN201880002297 A CN 201880002297A CN 109643377 A CN109643377 A CN 109643377A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- Optics & Photonics (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
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Abstract
The embodiment of the present application discloses a kind of fingerprint identification device and electronic equipment.The fingerprint identification device is arranged in below display screen so that its fingerprint collecting region is at least partially disposed within the display area of the display screen, the fingerprint identification device includes: supporting element, one end of the supporting element is for connecting the display screen, the other end of the supporting element is used to connect the circuit board below the fingerprint identification device, fixed structure is provided on the supporting element, the fixed structure is for fixing the optics collimator；Optical fingerprint sensor is arranged on the circuit board；Optics collimator, it is arranged on the fixed structure, so that the top of the optical fingerprint sensor is arranged in the optics collimator, and the distance between the optics collimator and the display screen and the distance between the optics collimator and the optical fingerprint sensor is made to meet the imaging demand of the optics collimator.Therefore the fingerprint identification device can be realized effective fingerprint recognition.
Description
Technical Field
The embodiment of the application relates to the technical field of fingerprint identification, and more particularly relates to a fingerprint identification device and an electronic device.
Background
With the rapid development of electronic devices, people pay more and more attention to fingerprint identification technology. For the common capacitive fingerprint identification technology in the market at present, the influence of penetrating thickness and wet fingers is avoided, the position of the fingerprint identification device on the electronic equipment is greatly limited, and the screen occupation ratio of the electronic equipment is influenced.
The optical fingerprint identification technology is to collect reflected light formed by the reflection of light rays emitted by a light source on a finger through an optical fingerprint sensor, wherein the reflected light carries fingerprint information of the finger, so that the fingerprint identification is realized. Compare in capacitanc fingerprint identification device, the requirement of optics fingerprint identification device to the screen thickness of electronic equipment is lower to the position of placing can be more nimble on electronic equipment, can improve the screen of electronic equipment moreover and account for than. In order to achieve these advantages, optical components such as an optical fingerprint sensor and an optical collimator need to be included in the optical fingerprint recognition device, and therefore, how to properly arrange these optical components so that the optical fingerprint recognition device can realize effective fingerprint recognition is a problem that needs to be solved urgently.
Disclosure of Invention
The embodiment of the application provides a fingerprint identification device and electronic equipment, and the structure of the fingerprint identification device enables the fingerprint identification device to realize effective fingerprint identification.
In a first aspect, a fingerprint identification device is provided, where the fingerprint identification device is configured to be disposed below a display screen such that a fingerprint collection area of the fingerprint identification device is at least partially located within a display area of the display screen, and the fingerprint identification device includes:
one end of the supporting piece is used for being connected with the display screen, the other end of the supporting piece is used for being connected with a circuit board below the fingerprint identification device, and a fixing structure is arranged on the supporting piece and used for fixing an optical collimator;
the optical fingerprint sensor is arranged on the circuit board and used for detecting optical signals reflected by objects above the fingerprint acquisition area;
the optical collimator is arranged on the fixed structure, so that the optical collimator is arranged above the optical fingerprint sensor, and the distance between the optical collimator and the display screen and the distance between the optical collimator and the optical fingerprint sensor meet the imaging requirement of the optical collimator, and the optical collimator is used for guiding the optical signal from the fingerprint collection area to the optical fingerprint sensor.
In this embodiment, be provided with fixed knot on fingerprint identification device's the support piece for fix optical collimator, make the distance between optical collimator and the display screen and the distance between optical collimator and the optical fingerprint sensor satisfy this optical collimator's imaging requirement respectively, thereby can realize effectual fingerprint identification. And, since a material such as a substrate is not required in the fingerprint recognition device, the thickness of the fingerprint recognition device can be reduced.
In a possible implementation manner, the support includes two brackets, and the fixing structure is a protrusion extending along an inner sidewall of the two brackets, wherein the optical collimator is fixed on an upper surface or a lower surface of the protrusion.
In one possible implementation, the fingerprint recognition device further comprises an optical filter disposed above the optical fingerprint sensor for selecting a wavelength of the optical signal transmitted to the optical fingerprint sensor. When the optical collimator is fixed on the upper surface of the convex part, the optical filter is fixed on the lower surface of the convex part, or the optical filter is arranged on the upper surface of the optical fingerprint sensor; alternatively, the optical filter is fixed on the upper surface of the protrusion when the optical collimator is fixed on the lower surface of the protrusion, or the optical filter is disposed on the upper surface of the optical fingerprint sensor.
In one possible implementation, the optical collimator is fixed on an upper surface or a lower surface of the convex portion, and includes: the non-light-transmitting area at the edge of the optical collimator is pasted on the upper surface or the lower surface of the convex part through a non-transparent pasting material; the optical filter is fixed on the upper surface or the lower surface of the boss, and includes: the non-light-transmitting area at the edge of the filter is pasted on the upper surface or the lower surface of the convex part through an opaque pasting material; the optical filter is disposed on an upper surface of the optical fingerprint sensor, and includes: the optical filter is adhered to the upper surface of the optical fingerprint sensor through a transparent adhesive material.
In one possible implementation manner, the optical fingerprint identification device is adhered to the lower surface of the display screen through an opaque adhesive material.
In one possible implementation manner, the optical fingerprint identification device further includes a wire for electrically connecting the optical fingerprint sensor and the circuit board.
In a second aspect, a fingerprint identification device is provided, the fingerprint identification device being disposed below a display screen such that a fingerprint collection area thereof is at least partially located within a display area of the display screen, the fingerprint identification device comprising:
the optical fingerprint sensor is arranged on the substrate of the fingerprint identification device and used for detecting optical signals reflected by an object above the fingerprint acquisition area;
an optical collimator disposed over the optical fingerprint sensor for directing optical signals from the fingerprint acquisition area to the optical fingerprint sensor, the optical collimator being packaged with the optical fingerprint sensor or disposed over the optical fingerprint sensor as a separate component relative to the optical fingerprint sensor;
wherein a distance between the optical collimator and the display screen and a distance between the optical collimator and the optical fingerprint sensor satisfy an imaging requirement of the optical collimator.
In one possible implementation, the fingerprint recognition device further comprises an optical filter disposed above the optical fingerprint sensor for selecting a wavelength of the optical signal transmitted to the optical fingerprint sensor.
Wherein the optical filter is packaged with the optical fingerprint sensor, the optical collimator being disposed over the optical filter as a relatively separate component from the optical filter and the optical fingerprint sensor; or,
the optical collimator is packaged with the optical fingerprint sensor, and the optical filter is arranged above the collimator as a relatively independent component from the optical collimator and the optical fingerprint sensor; or,
the optical collimator, the optical filter, and the optical fingerprint sensor are packaged together.
In one possible implementation, the packaged parts are adhered together by a transparent adhesive material, and the non-light-transmitting areas of the edges of the relatively independent parts are adhered to the upper surface of the packaging material by an opaque adhesive material.
In a possible implementation manner, the fingerprint identification device is adhered to the lower surface of the display screen through an opaque adhesive material.
In one possible implementation, the optical fingerprint recognition device further includes a conductive wire for electrically connecting the optical fingerprint sensor and the substrate.
In a possible implementation manner, the substrate is connected to a circuit board below the fingerprint identification device through a welding mode.
In a third aspect, an electronic device is provided, including: a self-luminous display screen; and the fingerprint identification device of the first aspect or any possible implementation form of the first aspect or the fingerprint identification device of the second aspect or any possible implementation form of the second aspect.
In a possible implementation manner, the display screen is an organic light emitting diode display screen OLED, and a light emitting layer of the display screen includes a plurality of organic light emitting diode light sources, wherein the fingerprint identification device uses at least a part of the organic light emitting diode light sources as an excitation light source for fingerprint identification.
Drawings
Fig. 1 is a schematic plan view of an electronic device to which the present application may be applied.
Fig. 2 is a schematic partial cross-sectional view of the electronic device shown in fig. 1 along a-a'.
Fig. 3 is a schematic diagram of a position relationship between a fingerprint identification device and a display screen according to an embodiment of the present application.
Fig. 4 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 5 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of an optical collimator according to an embodiment of the present application.
FIG. 7 is a schematic diagram of the angles of light rays passing through an optical collimator according to an embodiment of the present application.
Fig. 8 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 9 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 10 is a schematic diagram of a connection between a fingerprint identification device and a display screen according to an embodiment of the present application.
Fig. 11 is a schematic diagram of a connection between a fingerprint identification device and a display screen according to an embodiment of the present application.
Fig. 12 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 13 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 14 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 15 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
Fig. 16 is a schematic diagram of a connection between a fingerprint identification device and a display screen according to an embodiment of the present application.
Fig. 17 is a schematic diagram of a connection between a fingerprint identification device and a display screen according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
As electronic devices step into the full-screen era, the fingerprint collecting area on the front side of the electronic devices is squeezed by the full-screen, and therefore, Under-screen (or Under-screen) fingerprint identification technology is receiving more and more attention. The technology of fingerprint identification under the screen is that a fingerprint identification device (such as an optical fingerprint identification device) is arranged below the display screen, so that fingerprint identification operation is performed in a display area of the display screen, and a fingerprint acquisition area does not need to be arranged in an area, except the display area, on the front surface of the electronic equipment.
Optical underscreen fingerprint identification technology uses light returned from the top surface of a device display assembly for fingerprint sensing and other sensing operations. The returning light carries information about an object (e.g., a finger) in contact with the top surface, and by collecting and detecting the returning light, a specific optical sensor module located below the display screen is realized. The design of the optical sensor module may be such that the desired optical imaging is achieved by appropriately configuring the optical elements for collecting and detecting the returned light.
It should be understood that the technical solutions of the embodiments of the present application may be applied to various electronic devices, such as portable or mobile computing devices, such as smart phones, notebook computers, tablet computers, and game devices, and other electronic devices, such as electronic databases, automobiles, and Automated Teller Machines (ATMs), but the embodiments of the present application are not limited thereto.
Fig. 1 and fig. 2 are schematic diagrams illustrating an electronic device 100 to which the fingerprint identification device according to the embodiment of the present application may be applied, where fig. 1 is a schematic diagram illustrating a front side of the electronic device 100, and fig. 2 is a schematic diagram illustrating a partial cross-sectional structure of the electronic device 100 shown in fig. 1 along a-a'.
As shown in fig. 1 and 2, the electronic device 100 includes a display 120 and an optical fingerprint identification device (hereinafter, referred to as fingerprint identification device) 130, wherein the optical fingerprint identification device 130 has one or more sensing arrays disposed at least in a partial region below the display 120, so that a fingerprint collection region (or sensing region) 103 of the optical fingerprint identification device 130 is at least partially located in a display region 102 of the display 120.
It should be understood that the area of the fingerprint collection area 103 may be different from the area of the sensing array of the optical fingerprint identification device 130, for example, by the design of optical path such as lens imaging, reflective folded optical path design or other optical path design such as light convergence or reflection, the area of the fingerprint collection area 103 of the optical fingerprint identification device 130 may be larger than the area of the sensing array of the optical fingerprint identification device 130. In other alternative implementations, the fingerprint capture area 103 of the optical fingerprint recognition device 130 may be designed to correspond to the area of the sensing array of the optical fingerprint recognition device 130 if optical path guidance is performed, for example, by light collimation.
As shown in fig. 1, the fingerprint collection area 103 is located in the display area 102 of the display screen 120, so that when a user needs to unlock or otherwise verify a fingerprint of the electronic device, the user only needs to press a finger on the fingerprint collection area 103 of the display screen 120, so as to realize fingerprint input. Since fingerprint detection can be implemented in the screen, the electronic device 100 adopting the above structure does not need to reserve a special space on the front surface thereof to set a fingerprint key (such as a Home key), so that a full-screen scheme can be adopted, that is, the display area 102 of the display screen 120 can be substantially extended to the front surface of the whole electronic device 100.
In one embodiment, the display screen 120 may be a self-luminous display screen that uses self-luminous display units as display pixels, such as an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen. Taking an OLED display screen as an example, the optical fingerprint identification device 130 may use an OLED display unit (i.e., an OLED light source) of the OLED display screen 120 located in the fingerprint identification area 103 as an excitation light source for optical fingerprint detection.
In other embodiments, the optical fingerprint identification device 130 may also use an internal light source or an external light source to provide an optical signal for fingerprint detection. In this case, the optical fingerprint recognition device 130 may be adapted to a non-self-luminous display screen, such as a liquid crystal display screen or other passive luminous display screen. Taking an application to a liquid crystal display having a backlight module and a liquid crystal panel as an example, to support the underscreen fingerprint detection of the liquid crystal display, the optical fingerprint system of the electronic device 100 may further include an excitation light source for optical fingerprint detection, where the excitation light source may specifically be an infrared light source or a light source of non-visible light with a specific wavelength, and may be disposed below the backlight module of the liquid crystal display or in an edge area below a protective cover of the electronic device 100, and the optical fingerprint identification device 130 may be disposed below the edge area of the liquid crystal panel or the protective cover and guided through a light path so that the fingerprint detection light may reach the optical fingerprint identification device 130; alternatively, the optical fingerprint recognition device 130 may be disposed below the backlight module, and the backlight module may be perforated or otherwise optically designed to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint recognition device 130.
Moreover, the sensing array of the optical fingerprint identification apparatus 130 is specifically a Photo detector (Photo detector) array, which includes a plurality of Photo detectors distributed in an array, and the Photo detectors may be used as the optical sensing units as described above. When a finger touches, presses or approaches (for convenience of description, this application refers to as touching) the fingerprint identification area 103, light emitted by the display unit of the fingerprint identification area 103 reflects on the fingerprint on the surface of the finger and forms reflected light, wherein the reflected light of the ridges and the valleys of the fingerprint of the finger is different, and the reflected light is received from the display screen 120 and is converted into a corresponding electrical signal, i.e., a fingerprint detection signal. Fingerprint image data can be obtained based on the fingerprint detection signal, and fingerprint matching verification can be further performed, so that an optical fingerprint identification function is realized in the electronic device 100.
It should be understood that in a specific implementation, the electronic device 100 further includes a transparent protective cover plate 110, and the cover plate 110 may be a transparent cover plate, such as a glass cover plate or a sapphire cover plate, which is located above the display screen 120 and covers the front surface of the electronic device 100. Therefore, in the embodiment of the present application, the fact that the user touches, presses or approaches the display screen 120 means that the user actually touches, presses or approaches the cover plate 110 above the display screen 120 or a protective layer surface covering the cover plate 110. In addition, the electronic device 100 may further include a touch sensor, which may be specifically a touch panel, and may be disposed on the surface of the display screen 120, or may be partially or wholly integrated into the display screen 120, that is, the display screen 120 is specifically a touch display screen.
As an alternative implementation, as shown in fig. 2, the optical fingerprint identification apparatus 130 includes an optical detection unit 134 and an optical component 132, where the optical detection unit 134 includes the sensing array and a reading circuit and other auxiliary circuits electrically connected to the sensing array, which can be fabricated on a chip (Die) by a semiconductor process; that is, the optical detection unit 134 may be fabricated on an optical imaging chip or an image sensing chip. The optical component 132 may be disposed above the sensing array of the optical detection unit 134, and may specifically include an optical Filter (or Filter), a light path guiding structure, and other optical elements, where the optical Filter may be used to Filter out ambient light penetrating through the finger, and the light path guiding structure is mainly used to perform light path guiding such as collimating, modulating, or converging on light rays propagating downwards to achieve guiding reflected light reflected from the surface of the finger to the sensing array for optical detection.
In a specific implementation, the optical component 132 and the optical detection unit 134 may be packaged in the same optical fingerprint chip, or the optical component 132 may be disposed outside the chip on which the optical detection unit 134 is located, for example, the optical component 132 is attached above the chip, or some components of the optical component 132 are integrated in the chip. The optical path guiding structure of the optical component 132 has various implementation schemes, for example, the optical path guiding structure may be an optical path modulator or an optical path collimator fabricated on a semiconductor silicon wafer or other substrate, and the optical path guiding structure has a plurality of optical path modulating units or collimating units, and the optical path modulating units or collimating units may be a micro-pore array. Alternatively, the light guide layer may be an optical Lens (Lens) layer having one or more Lens units, such as a Lens group consisting of one or more aspheric lenses. The reflected light reflected from the finger is collimated or converged by the micropore array or the lens unit and received by the optical sensing unit below the micropore array or the lens unit, so that the sensing array can detect the fingerprint image of the finger.
A Circuit board 140, such as a Flexible Printed Circuit (FPC), may be disposed below the optical fingerprint identification device 130, and the optical fingerprint identification device 130 may be soldered to the Circuit board 140 through a solder pad, for example, and may be electrically interconnected with other peripheral circuits or other components of the electronic device 100 and transmit signals through the Circuit board 140. For example, the optical fingerprint identification device 130 may receive a control signal of a processing unit of the electronic apparatus 100 through the circuit board 140, and may also output the fingerprint detection signal to the processing unit or the control unit of the electronic apparatus 100 through the circuit board 140.
The application provides two structures of an optical fingerprint identification device. For example, as shown in fig. 3, the fingerprint recognition device may be placed below the display screen. According to the size of the fingerprint identification device and the layout requirement of a fingerprint acquisition area of the fingerprint identification device, and by combining with human engineering, materials such as foam and copper foil can be removed from the corresponding position on the back surface of the self-luminous display screen to form a specific groove. The fingerprint identification device can be pasted in the groove of the display screen according to a certain direction through pasting and other modes so as to realize the combination of the optical fingerprint identification device and the display screen.
The fingerprint recognition device according to the embodiment of the present application will be described in detail with reference to fig. 4 to 11. The fingerprint identification device can be applied to electronic equipment with a self-luminous display screen.
Fig. 4 and 5 show a possible structure of a fingerprint recognition device 400 according to an embodiment of the present application. As shown in fig. 4 and 5, the fingerprint recognition device is configured to be disposed under the display screen such that the fingerprint acquisition area thereof is at least partially located within the display area of the display screen. The fingerprint identification device includes a support, an optical fingerprint sensor, and an optical collimator.
One end of the supporting piece is used for being connected with the display screen, the other end of the supporting piece is used for being connected with the circuit board below the fingerprint identification device, and the supporting piece is provided with a fixing structure which is used for fixing the optical collimator.
The optical fingerprint sensor is arranged on the circuit board and used for detecting optical signals reflected by objects above the fingerprint acquisition area.
The optical collimator is arranged on the fixed structure, so that the optical collimator is arranged above the optical fingerprint sensor, and the distance between the optical collimator and the display screen and the distance between the optical collimator and the optical fingerprint sensor meet the imaging requirement of the optical collimator, and the optical collimator is used for guiding the optical signal from the fingerprint collection area to the optical fingerprint sensor.
The material of the support member is not limited in the embodiments of the present application. One end of the supporting piece is connected with the display screen above the fingerprint identification device, and the other end of the supporting piece is connected with the circuit board below the fingerprint identification device, so that the inner space of the fingerprint identification device is formed to arrange each optical component. The support is provided with a fixing structure which can play a role in fixing the optical collimator. And through setting up the high position of this fixed knot structure on support piece, can be so that when this optical collimator fixes on this fixed knot structure, the distance between this optical collimator and the display screen satisfies the object distance requirement that this optical collimator formation of image needs satisfied to and the distance between this optical collimator and the optics fingerprint sensor satisfies the image distance requirement that this optical collimator formation of image needs satisfied, thereby the optical signal of the object reflection of fingerprint collection region top can accurately reach optics fingerprint sensor.
The optical fingerprint sensor comprises a sensing array with a plurality of optical sensing units, and the area of the sensing array corresponds to the fingerprint acquisition area of the fingerprint identification device. Like this, after the light that the finger reflection above from fingerprint collection region arrived optical fingerprint sensor through this optics collimater, optical fingerprint sensor's induction element just can obtain the light signal who carries the fingerprint pattern to handle the light signal who gathers in order to realize accurate fingerprint identification.
Furthermore, since each component in the fingerprint identification device does not need to be formed on a substrate or the like, the thickness of the fingerprint identification device can be reduced, thereby realizing optical fingerprint identification and reducing the volume of the fingerprint identification device.
Optionally, the support comprises two brackets, and the fixing structure is a protrusion extending along the inner side walls of the two brackets, as shown in fig. 4 and 5, for example. However, the present application is not limited to this, and the fixing structure may be a stepped structure provided on the two brackets, or the like.
Wherein the optical collimator may be fixed on an upper surface or a lower surface of the boss. For example, as shown in fig. 4, the optical collimator is adhered to the upper surface of the convex portion; as another example, as shown in fig. 8, the optical collimator is attached to the lower surface of the convex portion. The bonding material for bonding the optical collimator and the protruding portion may be an opaque bonding material, such as an opaque adhesive film or glue.
The height of the protrusions extending along the inner side walls of the two supports needs to take into account the imaging parameters of the optical collimator. The distance between the optical collimator and the display screen is the image distance P of the optical collimator and should be within a certain range; the distance between the optical collimator and the optical fingerprint sensor is the image distance Q of the optical collimator and should be within a certain range. Therefore, the total height of the bracket and the height of the position of the protruding part on the bracket should be such that the distance between the optical collimator and the display screen and the distance between the optical collimator and the optical fingerprint sensor are within corresponding ranges after the optical collimator is fixed on the upper surface or the lower surface of the protruding part.
The optical collimator in the embodiment of the present application may be, for example, a silicon wafer with a through hole array, or a mixed combination of a high transmittance glass and a low transmittance material, as shown in fig. 6, the hole array includes a plurality of light holes with regular apertures and hole pitches, the light holes may have a high transmittance, for example, greater than 95%, for the light reflected by the finger above the fingerprint collecting area, and the other non-light transmissive areas may have a high absorption for the light, for example, T ═ I is satisfiedt/I0≤5％(ItFor transmitting light, I0The optical collimator is mainly used for collimating, modulating, imaging and the like the fingerprint detection light which is transmitted downwards, guiding the reflected light reflected from the surface of a finger to a sensing unit of the optical fingerprint sensor so as to perform optical detection to obtain fingerprint image information, and filtering light which does not meet the requirement of an incidence angle, such as light which has an included angle of more than α with the axial direction of an aperture in fig. 7, wherein the ratio of the aperture D of a single hole to the thickness T of the optical collimator can be 1: 30 to 1: 5, and the arrangement angle of the light holes on the optical collimator is matched with the arrangement direction of self-luminous units on a self-luminous display screen.
Optionally, the fingerprint identification device further comprises an optical filter disposed above the optical fingerprint sensor, wherein when the optical collimator is fixed on the upper surface of the protruding portion, the optical filter is fixed on the lower surface of the protruding portion, or the optical filter is disposed on the upper surface of the optical fingerprint sensor; or,
when the optical collimator is fixed on the lower surface of the protrusion, the optical filter is fixed on the upper surface of the protrusion, or the optical filter is disposed on the upper surface of the optical fingerprint sensor.
The optical filter (or called as a filter) in the embodiment of the present application has high transmittance for light of a specific wavelength band, but does not have high transmittance for other wavelength bands. The substrate of the optical filter can be made of high-light-transmittance materials such as blue glass or blue crystal, and films with specific materials, layers and thicknesses are plated on the upper surface and the lower surface of the substrate respectively, so that light passing through the optical filter is filtered, and the wavelength selection effect is achieved.
The optical filter may be disposed anywhere between the display screen and the optical fingerprint sensor.
For example, as shown in fig. 4, the optical collimator is attached to the upper surface of the convex portion, and the optical filter is attached to the lower surface of the convex portion. For another example, as shown in fig. 5, the optical collimator is attached to the upper surface of the convex portion, and the optical filter is attached to the upper surface of the optical fingerprint sensor. At this time, the light signal reflected by the finger is modulated by the optical collimator and then guided to the sensing unit of the optical fingerprint sensor, and is filtered by the optical filter before reaching the optical fingerprint sensor.
Of course, in the embodiment of the present application, both the optical collimator and the optical filter are disposed between the display screen and the optical fingerprint sensor, but the distance between the optical collimator and the display screen and the optical fingerprint sensor should satisfy certain requirements, and the optical filter may be disposed at any position between the display screen and the optical fingerprint sensor. Therefore, in addition to the structure of the fingerprint recognition device shown in fig. 4 and 5, the optical collimator and the optical filter may be arranged otherwise as long as the above-described distance requirement is satisfied. For example, as shown in fig. 8, the optical collimator is attached to the lower surface of the convex portion, and the optical filter is attached to the upper surface of the convex portion. As another example, as shown in fig. 9, the optical collimator is attached to the upper surface of the optical fingerprint sensor, and the optical filter is attached to the upper surface of the convex portion. At this time, the optical signal reflected by the finger is filtered by the optical filter, and the light ray in the specific wave band obtained after filtering is modulated by the optical collimator and then guided to the sensing unit of the optical fingerprint sensor.
Between the optical components in fig. 4 to 9, when the light-transmitting area of the fingerprint identification device is pasted, the pasting material is transparent, so as to avoid blocking transmission of the optical signal carrying fingerprint information; when the non-light-transmitting area of the fingerprint identification device is pasted, the pasting material is opaque so as to avoid interference on the optical signal.
For example, when the optical filter is fixed on the upper surface or the lower surface of the protrusion, the non-light-transmitting region of the edge thereof is adhered to the upper surface or the lower surface of the protrusion by an opaque adhesive material such as an opaque glue or an adhesive film. When the optical filter is disposed above the optical sensor, a transparent adhesive material such as transparent glue or an adhesive film is required to be adhered to the upper surface of the optical sensor.
For another example, when the optical collimator is fixed on the upper surface or the lower surface of the convex portion, the non-light-transmitting region of the edge thereof is adhered to the upper surface or the lower surface of the convex portion by an opaque adhesive material such as an opaque glue or an adhesive film. When the optical collimator is disposed above the optical sensor, a transparent adhesive material such as a transparent adhesive film or the like is required to be adhered to the upper surface of the optical sensor.
Optionally, the fingerprint recognition device is attached to the lower surface of the display screen by an opaque adhesive material. For example, as shown in fig. 10 and 11, the fingerprint recognition device is mounted in a recess below the display screen. In addition, foam or opaque glued membrane that has certain thickness can also be added between support piece and the display screen to the material such as glue can also be fixed around the junction of support piece and display screen. In fig. 10 and 11, an opaque film is taken as an example between the supporting member and the display screen, and the opaque film not only can serve to connect the supporting member and the display screen, but also can increase the connection strength between the fingerprint identification device and the display screen.
Optionally, the fingerprint identification device further comprises a wire, such as a gold wire, for electrically connecting the optical fingerprint sensor and the circuit board.
Optionally, the fingerprint identification device further includes a signal processing module, which may be disposed on the circuit board and in an internal space of the fingerprint identification device, and is configured to process the optical signal received by the optical fingerprint sensor, for example, as shown in fig. 10 and 11, the signal processing module is disposed in an unnecessary space inside the fingerprint identification device, and effective utilization of the space may be achieved.
Fig. 12 to 15 show a possible structure of a fingerprint recognition device 400 according to another embodiment of the present application.
As shown in fig. 12 to 15, the fingerprint recognition device is disposed under the display screen such that a fingerprint collection area thereof is at least partially located within a display area of the display screen, and includes a support member, an optical fingerprint sensor, and an optical collimator.
The optical fingerprint sensor is arranged on the substrate of the fingerprint identification device and used for detecting optical signals reflected by objects above the fingerprint acquisition area.
The optical collimator is disposed above the optical fingerprint sensor for guiding the optical signal from the fingerprint acquisition area to the optical fingerprint sensor, the optical collimator being packaged with the optical fingerprint sensor, or the optical collimator being disposed above the optical fingerprint sensor as a separate component relative to the optical fingerprint sensor.
Wherein, the distance between this optical collimator and this display screen and the distance between this optical collimator and this optics fingerprint sensor satisfy this optical collimator's formation of image demand.
In the embodiment, the internal structure of the optical fingerprint identification device is constructed in a packaging mode, and any supporting piece does not need to be manufactured. Wherein the optical collimator may be packaged with the optical fingerprint sensor or may be disposed above the optical fingerprint sensor as a relatively separate component from the optical fingerprint sensor. Here, the distance between the optical collimator and the display screen should satisfy the requirement of the object distance required to be satisfied by the imaging of the optical collimator, and the distance between the optical collimator and the optical fingerprint sensor should satisfy the requirement of the image distance required to be satisfied by the imaging of the optical collimator, so that the optical signal reflected by the object above the fingerprint collection area can accurately reach the optical fingerprint sensor.
Like this, after the light that the finger reflection above from fingerprint collection region arrived optical fingerprint sensor through this optics collimater, optical fingerprint sensor's induction element just can obtain the light signal who carries the fingerprint pattern to handle the light signal who gathers in order to realize accurate fingerprint identification.
Optionally, the fingerprint recognition device further comprises an optical filter arranged above the optical fingerprint sensor for selecting a wavelength of the optical signal transmitted to the optical fingerprint sensor.
Wherein the optical filter is packaged with the optical fingerprint sensor, the optical collimator is disposed over the optical filter as a relatively independent component from the optical filter and the optical fingerprint sensor; or,
the optical collimator is packaged with the optical fingerprint sensor, and the optical filter is arranged above the collimator as a relatively independent component with respect to the optical collimator and the optical fingerprint sensor; or,
the optical collimator, the optical filter and the optical fingerprint sensor are packaged together.
It should be understood that the optical collimator and the optical filter are both disposed between the display screen and the optical fingerprint sensor, but the distance between the optical collimator and the display screen and the optical fingerprint sensor should satisfy certain requirements, and the optical filter may be disposed anywhere between the display screen and the optical fingerprint sensor.
For example, as shown in fig. 12, the optical filter is attached to the upper surface of the optical fingerprint sensor, the optical filter and the optical fingerprint sensor are packaged together, and the optical collimator is attached to the upper surface of the packaging material (or plastic package). As another example, as shown in fig. 13, the optical collimator is attached to the upper surface of the optical fingerprint sensor, and the optical collimator and the optical fingerprint sensor are packaged together, and the optical filter is attached to the upper surface of the packaging material. As further shown in fig. 14 and 15, for example, the optical collimator, the optical filter, and the optical fingerprint sensor are packaged together. Wherein, in fig. 14, the optical filter is attached to the upper surface of the optical fingerprint sensor and the optical collimator is attached to the upper surface of the optical filter; in fig. 15, the optical collimator is attached to the upper surface of the optical fingerprint sensor and the optical filter is attached to the upper surface of the optical collimator.
In the fingerprint identification device, all the parts packaged together can be adhered together through a transparent adhesive material, so that the transmission of optical signals is prevented from being shielded; the non-transparent area of the edge of the relatively independent component can be adhered to the upper surface of the packaging material through an opaque adhesive material so as to avoid interference on the optical signal.
For example, in fig. 12, the adhesive material between the optical filter and the optical fingerprint sensor should have a high transmittance such as a transparent adhesive film. The adhesive material between the optical collimator and the packaging material is an opaque adhesive material such as an opaque adhesive film or glue. The thickness of the opaque pasting material between the optical collimator and the packaging material meets a certain thickness requirement, so that the distance between the optical collimator and the optical fingerprint sensor is within the range of the image distance requirement required by imaging of the optical collimator.
And a certain distance requirement should be met between the fingerprint identification device and the display screen, so that the distance between the optical collimator and the optical fingerprint sensor is within the range of the object distance requirement required by the optical collimator for imaging. So that the optical signal reflected by the object above the fingerprint collection area can accurately reach the optical fingerprint sensor.
Optionally, the fingerprint recognition device is attached to the lower surface of the display screen by an opaque adhesive material. As shown in fig. 16 and 17, for example, the fingerprint recognition device is mounted in a recess below the display screen. In addition, foam or opaque glued membrane of certain thickness can also be added between support piece and the display screen, and this thickness can be used for adjusting the distance between optical collimator and the display screen to the both sides of the junction of support piece and display screen can be fixed through materials such as glue. In fig. 16 and 17, an opaque film is taken as an example between the support member and the display screen, and the thickness of the opaque film enables the distance between the optical collimator and the display screen to meet the imaging requirement of the optical collimator, and the opaque film can play a role in connecting the support member and the display screen, and can also increase the connection strength between the fingerprint identification device and the display screen.
In fig. 12 to 15, a preferred embodiment may refer to the fingerprint recognition device shown in fig. 12. In fig. 13 to 15, the optical collimator is directly attached to the optical fingerprint sensor and/or the optical filter through the adhesive film and is packaged, so when the lower surface of the optical collimator is attached to the lower part thereof through the adhesive film, or when the upper surface of the optical collimator is attached to the upper part thereof through the adhesive film, the adhesive film material may overflow into the light-transmitting holes of the optical collimator, thereby affecting the performance of the optical collimator. In fig. 12, the optical collimator is not packaged with the optical fingerprint sensor and the optical filter, that is, the optical collimator is not packaged, but the regions at the two ends of the optical collimator, which are not used for transmitting light, are attached to the upper surface of the packaging material through the opaque adhesive material. Therefore, the light holes of the optical collimator can be prevented from overflowing into the bonding material, and the performance of the optical collimator is ensured.
Optionally, the substrate is connected to the circuit board under the fingerprint identification device by soldering. As shown in fig. 12-15, for example, the substrate has pads underneath, which are soldered together and in electrical communication with pads on the circuit board by a solder, such as tin.
Optionally, the optical fingerprint identification device further includes a conductive wire, such as a gold wire, for electrically connecting the optical fingerprint sensor and the substrate, or electrically connecting the optical fingerprint sensor and the circuit board.
It should be understood that in the fingerprint identification device of the embodiment of the present application, the components to be pasted together must be pasted in the light-transmitting area, and a pasting material with high transmittance must be used, so as to avoid blocking the transmission of the optical signal; if the light-transmitting region is adhered, opaque adhesive material is recommended to avoid the stray light from interfering the light signal.
The embodiment of the application also provides electronic equipment which can comprise a self-luminous display screen and the fingerprint identification device in the various embodiments of the application.
The electronic equipment can be any electronic equipment with a self-luminous display screen, and fingerprint identification under an optical screen is realized by adopting the technical scheme of the embodiment of the application.
The display screen may be the display screen described above, such as an OLED display screen.
When the self-luminous display screen is an organic light-emitting diode display screen, the light-emitting layer of the self-luminous display screen comprises a plurality of organic light-emitting diode light sources, wherein at least part of the organic light-emitting diode light sources are used as excitation light sources for fingerprint identification by the fingerprint identification device.
It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application.
It is to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. For example, as used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. A fingerprint identification device configured to be disposed beneath a display screen such that a fingerprint collection area thereof is at least partially within a display area of the display screen, the fingerprint identification device comprising:
one end of the supporting piece is used for being connected with the display screen, the other end of the supporting piece is used for being connected with a circuit board below the fingerprint identification device, and a fixing structure is arranged on the supporting piece and used for fixing an optical collimator;
the optical fingerprint sensor is arranged on the circuit board and used for detecting optical signals reflected by objects above the fingerprint acquisition area;
the optical collimator is arranged on the fixed structure, so that the optical collimator is arranged above the optical fingerprint sensor, and the distance between the optical collimator and the display screen and the distance between the optical collimator and the optical fingerprint sensor meet the imaging requirement of the optical collimator, and the optical collimator is used for guiding the optical signal from the fingerprint collection area to the optical fingerprint sensor.
2. The fingerprint recognition device of claim 1, wherein the support member comprises two brackets, and the fixing structure is a protrusion extending along inner sidewalls of the two brackets, wherein the optical collimator is fixed on an upper surface or a lower surface of the protrusion.
3. The fingerprint recognition device of claim 1 or 2, further comprising an optical filter disposed above the optical fingerprint sensor for selecting a wavelength of an optical signal transmitted to the optical fingerprint sensor,
when the optical collimator is fixed on the upper surface of the convex part, the optical filter is fixed on the lower surface of the convex part, or the optical filter is arranged on the upper surface of the optical fingerprint sensor; or,
when the optical collimator is fixed on the lower surface of the protruding portion, the optical filter is fixed on the upper surface of the protruding portion, or the optical filter is disposed on the upper surface of the optical fingerprint sensor.
4. The fingerprint recognition device according to claim 3,
the optical collimator is fixed on the upper surface or the lower surface of the convex part and comprises: the non-light-transmitting area at the edge of the optical collimator is pasted on the upper surface or the lower surface of the convex part through a non-transparent pasting material;
the optical filter is fixed on the upper surface or the lower surface of the boss, and includes: the non-light-transmitting area at the edge of the filter is pasted on the upper surface or the lower surface of the convex part through an opaque pasting material;
the optical filter is disposed on an upper surface of the optical fingerprint sensor, and includes: the optical filter is adhered to the upper surface of the optical fingerprint sensor through a transparent adhesive material.
5. The fingerprint recognition device according to any one of claims 1 to 4, wherein the optical fingerprint recognition device is adhered to the lower surface of the display screen by an opaque adhesive material.
6. The fingerprint recognition device of any one of claims 1-5, wherein the optical fingerprint recognition device further comprises a conductive wire for electrically connecting the optical fingerprint sensor and the circuit board.
7. A fingerprint identification device disposed below a display screen such that a fingerprint collection area thereof is at least partially within a display area of the display screen, the fingerprint identification device comprising:
the optical fingerprint sensor is arranged on the substrate of the fingerprint identification device and used for detecting optical signals reflected by an object above the fingerprint acquisition area;
an optical collimator disposed over the optical fingerprint sensor for directing optical signals from the fingerprint acquisition area to the optical fingerprint sensor, the optical collimator being packaged with the optical fingerprint sensor or disposed over the optical fingerprint sensor as a separate component relative to the optical fingerprint sensor;
wherein a distance between the optical collimator and the display screen and a distance between the optical collimator and the optical fingerprint sensor satisfy an imaging requirement of the optical collimator.
8. The fingerprint recognition device of claim 7, further comprising an optical filter disposed above the optical fingerprint sensor for selecting a wavelength of an optical signal transmitted to the optical fingerprint sensor,
wherein the optical filter is packaged with the optical fingerprint sensor, the optical collimator being disposed over the optical filter as a relatively separate component from the optical filter and the optical fingerprint sensor; or,
the optical collimator is packaged with the optical fingerprint sensor, and the optical filter is arranged above the collimator as a relatively independent component from the optical collimator and the optical fingerprint sensor; or,
the optical collimator, the optical filter, and the optical fingerprint sensor are packaged together.
9. The fingerprint recognition device of claim 8, wherein the packaged components are adhered together by a transparent adhesive material, and the non-light-transmitting areas of the edges of the relatively independent components are adhered to the upper surface of the packaging material by an opaque adhesive material.
10. The fingerprint recognition device according to any one of claims 7 to 9,
the fingerprint identification device is pasted on the lower surface of the display screen through an opaque pasting material.
11. The fingerprint recognition device of any one of claims 7-10, wherein the optical fingerprint recognition device further comprises a conductive wire for electrically connecting the optical fingerprint sensor and the substrate.
12. The fingerprint recognition device of any one of claims 7-11, wherein the substrate is attached to a circuit board below the fingerprint recognition device by soldering.
13. An electronic device, comprising:
self-luminous display screen, and
the fingerprint recognition device according to any one of claims 1 to 6, or the fingerprint recognition device according to any one of claims 7 to 12.
14. The electronic device of claim 13, wherein the display screen is an organic light emitting diode display screen OLED, and the light emitting layer of the display screen comprises a plurality of organic light emitting diode light sources, and wherein the fingerprint identification device employs at least a portion of the organic light emitting diode light sources as the excitation light sources for fingerprint identification.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/116259 WO2020102949A1 (en) | 2018-11-19 | 2018-11-19 | Fingerprint identification apparatus and electronic device |
Publications (1)
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| CN109643377A true CN109643377A (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880002297.1A Pending CN109643377A (en) | 2018-11-19 | 2018-11-19 | Fingerprint identification device and electronic equipment |
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| CN (1) | CN109643377A (en) |
| WO (1) | WO2020102949A1 (en) |
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| CN111062347A (en) * | 2019-12-21 | 2020-04-24 | 武汉中海庭数据技术有限公司 | Traffic element segmentation method in automatic driving, electronic device and storage medium |
| CN114072859A (en) * | 2020-05-07 | 2022-02-18 | 指纹卡安娜卡敦知识产权有限公司 | Biometric imaging apparatus including collimating structure and method of imaging in biometric imaging apparatus |
| CN111626214B (en) * | 2020-05-27 | 2023-09-05 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint identification device and system, fingerprint identification method and electronic device |
| CN111626214A (en) * | 2020-05-27 | 2020-09-04 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint identification device and system, fingerprint identification method and electronic device |
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Application publication date: 20190416 |