CN213182775U - Fingerprint discernment sensing mechanism and electronic equipment under screen - Google Patents
Fingerprint discernment sensing mechanism and electronic equipment under screen Download PDFInfo
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- CN213182775U CN213182775U CN202022307820.9U CN202022307820U CN213182775U CN 213182775 U CN213182775 U CN 213182775U CN 202022307820 U CN202022307820 U CN 202022307820U CN 213182775 U CN213182775 U CN 213182775U
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Abstract
The utility model discloses a fingerprint discernment sensing mechanism and electronic equipment under screen, it relates to fingerprint discernment technical field under the screen, fingerprint discernment sensing mechanism includes under the screen: a display screen; a light source unit and a light sensor disposed under the display screen; the light source unit is used for providing infrared detection light for irradiating fingers above the display screen, and the central wavelength of the infrared detection light is 1300nm or more; the optical sensor is used for receiving infrared detection light reflected by a finger above the display screen, and is a CMOS image sensor or a germanium-silicon wide spectrum sensor. The display effect of the OLED screen can be effectively improved, and fingerprint identification is facilitated.
Description
Technical Field
The utility model relates to a fingerprint identification technical field under the screen, in particular to fingerprint identification sensing mechanism and electronic equipment under screen.
Background
At present, in a smart phone, the function of a fingerprint identification module is realized by a touch screen of the smart phone. Most of the existing full-screen mobile phones adopt OLED screens, and by utilizing the self-luminous characteristic of the OLED, light rays penetrate through a glass cover plate and then are reflected after meeting finger fingerprints, and are received and identified by a receiving and identifying module below the screens. Visible light is at human finger surface reflection, it can only carry comparatively limited fingerprint information, in order to survey more biological characteristic information, need increase the infrared wave band that has stronger to human skin penetrability, and present OLED screen can't send the detection light of infrared wave band, consequently need set up infrared light source under the screen, but because also contained some infrared detection light in the ambient light, consequently received by the infrared detection light that infrared light source sent and discernment easily receive the influence of ambient light, influenced the fingerprint identification effect.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides fingerprint identification sensing mechanism and electronic equipment under the screen, improves the display effect of OLED screen, helps fingerprint identification simultaneously.
The embodiment of the utility model provides a concrete technical scheme is:
a fingerprint identification sensing mechanism under a screen, the fingerprint identification sensing mechanism under the screen comprising: a display screen; a light source unit and a light sensor disposed under the display screen;
the light source unit is used for providing infrared detection light for irradiating fingers above the display screen, and the central wavelength of the infrared detection light is 1300nm or more;
the optical sensor is used for receiving infrared detection light reflected by a finger above the display screen, and is a CMOS image sensor or a germanium-silicon wide spectrum sensor. Preferably, the central wavelength of the infrared detection light is between 1300nm and 1600 nm.
Preferably, the light source unit is one or more near-infrared LEDs.
Preferably, the light source unit includes a semiconductor light emitting element formed based on a group III-V semiconductor compound.
Preferably, the display screen is provided with a touch area for a finger of a user to touch and detect the fingerprint;
fingerprint discernment sensing mechanism still includes under the screen: and the light guide mechanism is used for guiding the infrared detection light irradiated by the light source unit to the touch area.
Preferably, the light guide mechanism is an optical lens disposed between the light source unit and the display screen, and is capable of focusing and guiding the infrared detection light emitted from the light source unit to the touch area, the optical lens has a plurality of layers of optically transparent media, and an interface of the media is concave or convex, so that the light is refracted at the interface to change a light path direction.
Preferably, the light guide mechanism is a first light reflection layer disposed on the upper surface of the display screen and a second light reflection layer disposed on the lower surface of the display screen, and the infrared detection light emitted by the light source unit reaches the second light reflection layer after being reflected by the first light reflection layer, and reaches the touch area after being reflected by the second light reflection layer.
Preferably, the light guide mechanism includes a light-transmitting layer formed by multiple layers of light-transmitting materials and disposed on the lower surface of the display screen, and the infrared detection light emitted by the light source unit passes through the multiple layers of light-transmitting layers and then reaches the touch area.
Preferably, the light guide mechanism includes a light-transmitting layer formed by a light-transmitting material and disposed on the surface of the light source unit, the light-transmitting layer has an inclined plane, a light-reflecting material is disposed on the inclined plane to form a first reflecting region, a light-reflecting material is disposed at least partially on a lower surface of the light-transmitting layer to form a second reflecting region, and infrared detection light emitted from the light source unit enters the light-transmitting layer, and is reflected by the first reflecting region and the second reflecting region to reach the touch region.
Preferably, the optical sensor has a sensing layer, and a light filtering layer or a light filter is disposed on the sensing layer, and the light filtering layer or the light filter is used for filtering out light rays with a specific wavelength band.
Preferably, the optical sensor has a sensing layer, and a light-gathering layer or a light-gathering device is arranged on the sensing layer and used for gathering light so that more light can reach the optical sensor.
An electronic device comprising an underscreen fingerprint identification sensing mechanism as described in any of the above; a memory for storing user fingerprint information collected by the light sensor; a microprocessor; the microprocessor is used for processing the electric signal of the user fingerprint information collected by the optical sensor and comparing the electric signal with the user fingerprint information in the memory so as to identify the user or the user operation.
The technical scheme of the utility model following beneficial effect that is showing has:
the central wavelength of the infrared detection light emitted by the light source unit is 1300nm and above, when the infrared detection light irradiates on a finger and is reflected and received, the influence of ambient light can be effectively filtered, because visible light in the ambient light is below 800nm, the infrared detection light is mainly in a waveband above 1300nm, and no visible light exists, so that when light in the waveband above 1300nm is selected as the detection light, the interference of the light receiving and the identification by the ambient light is minimum. Simultaneously, adopt germanium silicon wide-spectrum sensor or CMOS image sensor as optical sensor in this application, this kind of optical sensor can effectually receive the infrared light of the wave band more than 1300nm, and the infrared detection light of wave band below the effectual reduction below receiving 1300nm to reduce the interference of ambient light, help fingerprint identification.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.
Fig. 1 is a schematic structural view of a fingerprint identification sensing mechanism under a screen in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a light guide mechanism according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light guide mechanism according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a light guide mechanism according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a light guide mechanism according to a fourth embodiment in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a light guide mechanism according to a fifth embodiment of the present invention;
fig. 7 is a schematic diagram of the embodiment of the present invention in which a light source unit and a light sensor are integrated on the same chip;
fig. 8 is a schematic structural diagram of an optical sensor in a possible implementation according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Reference numerals of the above figures:
1. a display screen; 11. a touch area; 2. a light source unit; 3. a light sensor; 31. a sensing layer; 4. a light guide mechanism; 41. an optical lens; 42. a first light reflecting layer; 43. a second light reflecting layer; 44. a light transmitting layer; 45. a first reflective region; 46. a second reflective region; 47. a third reflective region; 5. a light filtering layer; 6. a light-condensing layer; 7. a light-shielding layer; 8. a connecting plate; 9. a finger.
Detailed Description
The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to effectively improve the display effect of OLED screen, help fingerprint identification simultaneously, proposed fingerprint identification sensing mechanism under the screen in this application, figure 1 is the embodiment of the utility model provides an embodiment fingerprint identification sensing mechanism's under the screen structural schematic diagram, as shown in figure 1, fingerprint identification sensing mechanism can include under the screen: a display screen 1; a light source unit 2 and a light sensor 3 disposed under the display screen 1; the light source unit 2 is used for providing infrared detection light for irradiating the finger 9 above the display screen 1, and the central wavelength of the infrared detection light is 1300nm or more; the optical sensor 3 is used for receiving infrared detection light reflected by a finger 9 above the display screen 1, and is a germanium-silicon wide spectrum sensor or a CMOS image sensor.
The central wavelength of the infrared detection light emitted by the light source unit is 1300nm and above, when the infrared detection light irradiates on a finger and is reflected and received, the influence of ambient light can be effectively filtered, because visible light in the ambient light is below 800nm, the infrared detection light is mainly in a waveband above 1300nm, and no visible light exists, so that when light in the waveband above 1300nm is selected as the detection light, the interference of the light receiving and the identification by the ambient light is minimum. Simultaneously, adopt germanium silicon wide-spectrum sensor or CMOS image sensor as optical sensor in this application, this kind of optical sensor can effectually receive the infrared light of the wave band more than 1300nm, and the infrared detection light of wave band below 1300nm is received to effectual reduction to reduce the interference of ambient light, help fingerprint identification.
To better understand the underscreen fingerprint recognition sensing mechanism of the present application, it will be further explained and explained below. As shown in fig. 1, the underscreen fingerprint identification sensing mechanism may include: a display screen 1; a light source unit 2 and a light sensor 3 disposed under the display screen 1.
The display screen 1 has a touch area 11 for a user's finger 9 to touch the detected fingerprint. When a finger 9 of a user touches a touch area 11 on the display screen 1, the light source unit 2 is configured to provide infrared detection light for irradiating the finger 9 above the display screen 1, the infrared detection light is reflected on the surface of the finger 9 of the user, and the optical sensor 3 is configured to receive the infrared detection light reflected by the finger 9 above the display screen 1, and perform corresponding processing, so as to obtain information such as a fingerprint on the surface of the finger 9 of the user. The display screen 1 may be a self-luminous display screen 1, or may be a passive luminous display screen 1, which is not limited in this application.
Corresponding research and experiments show that when the central wavelength of infrared detection light is between 1300nm and 1600nm, the interference of ambient light can be effectively reduced, and the fingerprint identification is facilitated.
The light source unit 2 may employ a near-infrared LED in order to generate infrared detection light in accordance with requirements. In a preferred embodiment, the near-infrared LED may employ a semiconductor light emitting element formed based on a III-V semiconductor compound. For example, in the semiconductor light emitting element, a multilayer InGaAsP group III-V semiconductor layer obtained by epitaxial growth on an InP substrate is used as an active layer, the emission center wavelength is determined by the composition of the active layer, and the emission center wavelength can be selected in the near infrared band. By adjusting parameters such as the composition, layer thickness, growth mode and the like of an active layer composed of a multilayer InGaAsP-based group III-V semiconductor layer, a semiconductor light-emitting element having a center wavelength of 1300nm or more can be obtained.
The light source unit 2 may also employ an infrared laser. In a preferred embodiment, the infrared laser may be a VCSEL or EEL for emitting probe light having a center wavelength in the 1300nm-1600nm band.
The optical sensor 3 is a photo sensor capable of receiving infrared detection light or the like. Preferably, the light sensor 3 may employ a silicon germanium wide spectrum sensor or a CMOS image sensor. For light with near-infrared central wavelength, particularly central wavelength above 1100nm, the light absorption rate of silicon as a light sensing material is lower, and the direct energy gap of germanium is lower, so that the sensor utilizing the characteristics of the germanium-silicon process is more suitable for being applied in the frequency band with near-infrared or longer wavelength, and has better effect of receiving the light. The CMOS image sensor can have a wide spectral response range, covers from visible light to infrared, can effectively receive infrared light of a wave band above 1300nm by selecting a proper CMOS image sensor, reduces the received infrared detection light of the wave band below 1300nm, and preferably can select a graphene image sensor based on CMOS. The light source unit 2 and the light sensor 3 may be provided on the same connection board 8.
In a possible embodiment, in order to increase the light with the infrared central wavelength as much as possible to enter the optical sensor 3 and block the light with other central wavelengths from entering the optical sensor 3 to cause interference, fig. 8 is a schematic structural diagram of the optical sensor in a possible embodiment of the present invention, as shown in fig. 8, the optical sensor 3 has a sensing layer 31, and the sensing layer 31 is used for receiving the infrared detection light reflected by the finger 9 above the display screen 1. A light filtering layer 5 or a light filter may be disposed on the sensing layer 31, and the light filtering layer 5 or the light filter is used to filter out light of a specific wavelength band so as to allow only light of an infrared wavelength band to pass through. For example, the light filter layer 5 or the light filter may be a visible light filter that allows only light in the infrared band to pass therethrough; or a narrow-band filter, such as a narrow-band filter with a target wavelength at a preset value, which only allows light with a central wavelength at the preset value to pass through; the infrared reflection reducing film and the narrow-band filter can be used for improving the transmission efficiency of infrared light and only allowing light with the central wavelength being a preset value to pass through. The preset value may be a certain target wavelength before 1300nm to 1600 nm.
When the light filtering layer 5 is disposed on the sensing layer 31, the light filtering layer 5 can be disposed directly on the upper surface of the sensing layer 31 and/or on the surface of other devices or dielectric layers above the sensing layer 31, and the two layers are integrated. When the optical filter is disposed on the sensing layer 31, the optical filter is disposed between the display screen 1 and the optical sensor 3, and the infrared detection light reflected by the finger 9 above the display screen 1 can reach the sensing layer 31 of the optical sensor 3 through the optical filter.
Since the sensing layer 31 on the optical sensor 3 has the photosensitive pixels arranged one by one, in order to make each photosensitive pixel receive more infrared detection light reflected by the finger 9 above the display screen 1, and simultaneously reduce interference of other infrared light and the like. Be provided with light shield layer 7 on the sensing layer 31, set up the trompil that position and sensitization pixel correspond on the light shield layer 7, light can pass light shield layer 7 through this trompil, and other regions of light shield layer 7 can realize blockking the effect to light. The light-gathering layer 6 or the light-gathering device is arranged on the sensing layer 31, and the light-gathering layer 6 or the light-gathering device is used for gathering light so that more light can reach the light sensor 3. The light-gathering layer 6 or the condenser can be positioned above the light-shielding layer 7, and the light-gathering layer 6 or the condenser is provided with a plurality of convex lenses which correspond to the holes one by one so as to enable light to achieve the gathering effect. The infrared detection light reflected by the finger 9 above the display screen 1 is converged in the light-condensing layer 6 or the light condenser, and the converged infrared detection light can reach the photosensitive pixel point of the light sensor 3 sensing layer 31 below the aperture through the aperture of the light-shielding layer 7.
As shown in fig. 8, in a specific embodiment, a light shielding layer 7 and a light condensing layer 6 may be disposed on the sensing layer 31 on the light sensor 3, and the light condensing layer 6 is located above the light shielding layer 7. The light filter layer 5 may be provided between the light-shielding layer 7 and the sensor layer 31, and the light filter layer 5 may be provided between the light-shielding layer 7 and the light-condensing layer 6. The infrared detection light reflected by the finger 9 above the display screen 1 firstly converges in the light-gathering layer 6, the converged infrared detection light is filtered through the light filtering layer 5, so that only the light with the infrared central wavelength passes through, and then the light filtering layer 5 between the sensing layer 31 and the light shielding layer 7 is reached through the opening of the light shielding layer 7 to be filtered again, so as to achieve a better filtering effect and finally reach the photosensitive pixel point of the light sensor 3 sensing layer 31 below the opening correspondingly.
In a possible implementation manner, fig. 7 is a schematic diagram of the embodiment of the present invention in which the light source unit and the light sensor are integrated on the same chip, as shown in fig. 7, for installation convenience, the light source unit 2 and the light sensor 3 may be integrated on the same chip, and both may be installed on the connection board 8 below the display screen 1.
Since the light source unit 2 is not generally located right below the touch area 11 of the display screen 1, it is necessary to guide the infrared detection light emitted from the light source unit 2 to the touch area 11, and in a possible implementation, the underscreen fingerprint identification sensing mechanism may include: and a light guide mechanism 4, wherein the light guide mechanism 4 is used for guiding the infrared detection light irradiated by the light source unit 2 to the touch area 11. The light guide 4 may be positioned between the display 1 and the light sensor 3, or integrated with the display 1, etc.
For example, fig. 2 is a schematic structural diagram of the light guide mechanism in the first embodiment of the present invention, as shown in fig. 2, in a specific embodiment, the light guide mechanism 4 is an optical lens 41 disposed between the light source unit 2 and the display screen 1, and is capable of focusing and guiding the infrared detection light irradiated from the light source unit 2 to the touch area 11, the optical lens 41 may have multiple layers of light transparent media, and the interface of the media is concave or convex, so that the light is refracted at the interface to change the direction of the light path, thereby changing the direction of the infrared detection light irradiated from the light source unit 2 and making the infrared detection light irradiate to the touch area 11.
For another example, fig. 3 is a schematic structural diagram of a light guide mechanism according to a second embodiment of the present invention, and as shown in fig. 3, in a specific embodiment, the light guide mechanism 4 includes a first light reflective layer 42 disposed on the upper surface of the display panel 1 and a second light reflective layer 43 disposed on the lower surface of the display panel 1. The first light reflecting layer 42 and the second light reflecting layer 43 may be integrated with the display panel 1, and the first light reflecting layer 42 has an acute angle with the surface of the display panel 1 for reflecting, which is generally towards the second light reflecting layer 43. The infrared detection light emitted from the light source unit 2 reaches the second light reflecting layer 43 after being reflected by the inclined surface of the first light reflecting layer 42, and reaches the touch area 11 after being reflected by the second light reflecting layer 43. And then reflected by the finger 9 on the touch area 11 towards the light sensor 3.
For another example, fig. 4 is a schematic structural diagram of a light guide mechanism according to a third embodiment of the present invention, as shown in fig. 4, in a specific embodiment, the light guide mechanism 4 includes a light transmissive layer 44 formed by multiple layers of light transmissive materials and disposed on the lower surface of the display screen 1, and the light transmissive layer 44 may be fixedly disposed on the lower surface of the display screen 1, and the two layers are connected together. Clear layer 44 may have a slope or curve that redirects light. The infrared detection light emitted from the light source unit 2 changes its direction slowly when passing through the multi-layer transparent layer 44, and finally, is emitted to the touch area 11.
For another example, fig. 5 is a schematic structural diagram of a light guide mechanism according to a fourth embodiment of the present invention, and as shown in fig. 5, in a specific embodiment, the light guide mechanism 4 may include a light-transmitting layer 44 formed of a light-transmitting material and disposed on a surface of the light source unit 2, and an upper surface of the light-transmitting layer 44 has a slope, and the slope generally has a tendency toward the light sensor 3. The inclined surface is provided with a light reflective material to form a first reflective region 45, the lower surface of the light transmissive layer 44 is at least partially provided with a light reflective material to form a second reflective region 46, and the second reflective region 46 may be located between the light source unit 2 and the light sensor 3. The infrared detection light emitted from the light source unit 2 enters the transparent layer 44, is reflected by the first reflection region 45, reaches the second reflection region 46, and is reflected to the touch region 11. Of course, after being reflected by the first reflection region 45 and then reaching the second reflection region 46, the light may be reflected to the third reflection region 47 on the upper surface of the first reflection region 45 or the transparent layer 44, and then reflected by the second reflection region 46 to reach the touch region 11. The infrared detection light is reflected by the finger 9 on the touch area 11 and then emitted to the optical sensor 3, or may be emitted to the optical sensor 3 through the transparent layer 44. Therefore, the light-transmissive layer 44 may also be provided on the upper surfaces of the light source unit 2 and the light sensor 3, which are combined together.
For another example, fig. 6 is a schematic structural diagram of the light guide mechanism in the fifth embodiment of the present invention, as shown in fig. 6, in a specific embodiment, the light guide mechanism 4 may be a plurality of light-transmitting holes at the touch area 11 on the display screen 1, so that part of the infrared detection light emitted from the light source unit 2 can pass through the holes to reach the user's finger 9 at the touch area 11 for reflection. The light guide mechanism 4 may also be configured to dispose sparser pixels or no pixels on the display screen 1 in the touch area 11 than other areas, so that a part of the infrared detection light emitted from the light source unit 2 can better penetrate through the display screen 1 and reach the user's finger 9 in the touch area 11 for reflection.
Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 9, the electronic device may include any one of the fingerprint identification sensing mechanisms under a screen as described above; a memory for storing a user's biometric information, such as fingerprint information, collected by the light sensor; a microprocessor; the microprocessor is used for processing the electric signal of the biological characteristics of the user collected by the optical sensor, such as the electric signal of the fingerprint information, and comparing the electric signal with the biological characteristics (fingerprint information) in the memory so as to identify the user or the user operation. For example, the electronic device may be a cell phone, a computer, an electronic watch, and the like.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The above embodiments are only embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the contents are only embodiments adopted for facilitating understanding of the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. The utility model provides a fingerprint discernment sensing mechanism under screen which characterized in that, fingerprint discernment sensing mechanism includes under the screen: a display screen; a light source unit and a light sensor disposed under the display screen;
the light source unit is used for providing infrared detection light for irradiating fingers above the display screen, and the central wavelength of the infrared detection light is 1300nm or more;
the optical sensor is used for receiving infrared detection light reflected by a finger above the display screen, and is a CMOS image sensor or a germanium-silicon wide spectrum sensor.
2. The underscreen fingerprint identification sensing mechanism according to claim 1, wherein said infrared detection light has a center wavelength between 1300nm and 1600 nm.
3. The underscreen fingerprint identification sensing mechanism of claim 1, wherein said light source unit is one or more near infrared LEDs.
4. The underscreen fingerprint recognition sensing mechanism of claim 1, wherein the light source unit comprises a semiconductor light emitting element formed based on a group III-V semiconductor compound.
5. The mechanism of claim 1, wherein the display screen has a touch area for a user's finger to touch the fingerprint;
fingerprint discernment sensing mechanism still includes under the screen: and the light guide mechanism is used for guiding the infrared detection light irradiated by the light source unit to the touch area.
6. The mechanism of claim 5, wherein the light guide mechanism is an optical lens disposed between the light source unit and the display screen, and is capable of focusing and guiding the infrared detection light emitted from the light source unit to the touch area, and the optical lens has multiple layers of optically transparent media, and the interface of the media is concave or convex, so that the light is refracted at the interface to change the direction of the light path.
7. The mechanism of claim 5, wherein the light guide mechanism comprises a first light reflecting layer disposed on the upper surface of the display screen and a second light reflecting layer disposed on the lower surface of the display screen, and the infrared detection light emitted from the light source unit is reflected by the first light reflecting layer, reaches the second light reflecting layer, and is reflected by the second light reflecting layer to the touch area.
8. The mechanism of claim 5, wherein the light guide mechanism comprises a light-transmitting layer formed by multiple layers of light-transmitting materials and disposed on the lower surface of the display screen, and the infrared detection light emitted from the light source unit passes through the multiple layers of light-transmitting layer and reaches the touch area.
9. The mechanism of claim 5, wherein the light guide mechanism comprises a light-transmitting layer made of a light-transmitting material and disposed on the surface of the light source unit, the light-transmitting layer has an inclined surface, the inclined surface is provided with a light-reflecting material to form a first reflecting region, at least a portion of the lower surface of the light-transmitting layer is provided with a light-reflecting material to form a second reflecting region, and the infrared detection light emitted from the light source unit enters the light-transmitting layer, and is reflected by the first reflecting region and the second reflecting region to reach the touch region.
10. The underscreen fingerprint identification sensing mechanism of claim 1, wherein the optical sensor has a sensing layer, and a light filtering layer or a light filter is arranged on the sensing layer, and the light filtering layer or the light filter is used for filtering out light rays with a specific wave band.
11. The mechanism of claim 1, wherein the optical sensor comprises a sensing layer, and a light-gathering layer or a light-gathering device is disposed on the sensing layer, and the light-gathering layer or the light-gathering device is used for gathering light so that more light can reach the optical sensor.
12. An electronic device, characterized in that the electronic device comprises an underscreen fingerprint recognition sensing mechanism according to any one of claims 1 to 11; a memory for storing user fingerprint information collected by the light sensor; a microprocessor; the microprocessor is used for processing the electric signal of the user fingerprint information collected by the optical sensor and comparing the electric signal with the user fingerprint information in the memory so as to identify the user or the user operation.
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| CN202022307820.9U CN213182775U (en) | 2020-10-16 | 2020-10-16 | Fingerprint discernment sensing mechanism and electronic equipment under screen |
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| CN202022307820.9U CN213182775U (en) | 2020-10-16 | 2020-10-16 | Fingerprint discernment sensing mechanism and electronic equipment under screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114019477A (en) * | 2021-09-22 | 2022-02-08 | 深圳阜时科技有限公司 | Electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114019477A (en) * | 2021-09-22 | 2022-02-08 | 深圳阜时科技有限公司 | Electronic equipment |
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