CN110458105B - Fingerprint identification device and electronic equipment - Google Patents
Fingerprint identification device and electronic equipment Download PDFInfo
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- CN110458105B CN110458105B CN201910741334.7A CN201910741334A CN110458105B CN 110458105 B CN110458105 B CN 110458105B CN 201910741334 A CN201910741334 A CN 201910741334A CN 110458105 B CN110458105 B CN 110458105B
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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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- 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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Abstract
本申请实施例提供一种指纹识别装置及电子设备。所述指纹识别装置包括壳体、成像模组和补光件，所述壳体具有收容腔以及间隔设置的入光部及出光部；所述成像模组位于所述收容腔内，且所述成像模组对应所述入光部设置；所述补光件位于所述收容腔内，且所述补光件对应所述出光部设置，所述补光件用于向电子设备的指纹识别区发射光线，所述成像模组用于接收经由所述指纹识别区内的目标对象的手指反射的光线，并根据接收到的所述光线得到所述目标对象的指纹图像。本申请实施例提供的指纹识别装置集成有补光件，可以灵活调节补光的强度，有助于提高指纹识别装置的成像质量。
Embodiments of the present application provide a fingerprint identification device and an electronic device. The fingerprint identification device includes a casing, an imaging module and a light-filling part, the casing has a receiving cavity and a light entrance part and a light exit part arranged at intervals; the imaging module is located in the receiving cavity, and the The imaging module is arranged corresponding to the light incident portion; the supplementary light element is located in the receiving cavity, and the supplementary light element is arranged corresponding to the light exit portion, and the supplementary light element is used for the fingerprint identification area of the electronic device Light is emitted, and the imaging module is configured to receive the light reflected by the finger of the target object in the fingerprint identification area, and obtain the fingerprint image of the target object according to the received light. The fingerprint identification device provided by the embodiment of the present application is integrated with a supplementary light, which can flexibly adjust the intensity of the supplementary light, thereby helping to improve the imaging quality of the fingerprint identification device.
Description
Technical Field
The application relates to the technical field of fingerprint identification, in particular to a fingerprint identification device and electronic equipment.
Background
At present, some electronic equipment manufacturers actively develop optical imaging type under-screen fingerprint identification devices for common LCD display screens, wherein the imaging quality of the fingerprint identification devices is related to the light intensity of a fingerprint identification area on the LCD display screens.
Disclosure of Invention
The embodiment of the application provides a fingerprint identification device and electronic equipment, can carry out nimble regulation to the luminance in fingerprint identification district, and then improve fingerprint identification device's imaging quality.
The embodiment of the application provides a fingerprint identification device, is applied to electronic equipment, fingerprint identification device includes:
the shell is provided with an accommodating cavity, and an incident light part and an emergent light part which are arranged at intervals;
the imaging module is positioned in the accommodating cavity and is arranged corresponding to the light inlet part; and
the light supplementing piece is located in the accommodating cavity and corresponds to the light emitting portion, the light supplementing piece is used for emitting light to a fingerprint identification area of the electronic equipment, the imaging module is used for receiving light reflected by a finger of a target object in the fingerprint identification area, and a fingerprint image of the target object is obtained according to the received light.
The fingerprint identification device that this application embodiment provided all accepts the intracavity in acceping of casing with light filling piece and imaging module, has improved fingerprint identification device's integrated level, and the light filling piece does not additionally occupy fingerprint identification device's space, helps realizing fingerprint identification device's compactification and arranges. Carry out the light filling through light filling spare to electronic equipment's fingerprint identification district, can improve the luminance in fingerprint identification district, when target object's finger laminating in the fingerprint identification district, the imaging module can obtain comparatively clear target object's fingerprint image to can improve fingerprint identification device's imaging quality, and then improve fingerprint identification device's fingerprint identification sensitivity.
The embodiment of the application further provides electronic equipment, which comprises a liquid crystal panel, a backlight module and the fingerprint identification device provided by any embodiment, wherein the electronic equipment is provided with a display area, and the display area is provided with a fingerprint identification area; the backlight module is stacked with the liquid crystal panel and is provided with light holes, and at least part of the light holes are arranged corresponding to the fingerprint identification area; the fingerprint identification device is located on one side, away from the liquid crystal panel, of the backlight module, at least part of the fingerprint identification device corresponds to the light-transmitting holes, when fingerprint identification is carried out, the light supplementing piece emits light towards the light-transmitting holes, the light penetrates through the fingerprint identification area and then is reflected by the fingers of the target object, the imaging module receives the light reflected by the fingers of the target object, and fingerprint images of the target object are obtained according to the light.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a cross-sectional view a-a of the electronic device provided in fig. 1.
Fig. 3 is a schematic structural diagram of another a-a sectional view of the electronic device provided in fig. 1.
Fig. 4 is a schematic diagram of a structure of the top view of fig. 3.
Fig. 5 is another schematic structural view of the top view of fig. 3.
Fig. 6 is a schematic view of yet another structure of the top view of fig. 3.
Fig. 7 is a schematic structural diagram of a further a-a sectional view of the electronic device provided in fig. 1.
Fig. 8 is a schematic structural diagram of a further a-a sectional view of the electronic device provided in fig. 1.
Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 10 is a schematic structural diagram of a B-B cross-sectional view of the electronic device provided in fig. 9.
Fig. 11 is a schematic structural diagram of another B-B cross-sectional view of the electronic device provided in fig. 9.
Fig. 12 is a schematic structural diagram of a further B-B cross-sectional view of the electronic device provided in fig. 9.
Fig. 13 is a schematic structural diagram of a further B-B cross-sectional view of the electronic device provided in fig. 9.
Fig. 14 is a schematic structural diagram of a further B-B cut-away view of the electronic device provided in fig. 9.
Fig. 15 is a schematic structural diagram of a further B-B cross-sectional view of the electronic device provided in fig. 9.
Fig. 16 is a schematic structural diagram of a further B-B cross-sectional view of the electronic device provided in fig. 9.
Fig. 17 is a schematic partial structure diagram of an electronic device according to an embodiment of the present application.
Fig. 18 is a schematic structural diagram of a top view of the fingerprint recognition device in the electronic device provided in fig. 17.
Fig. 19 is a schematic structural diagram of a further B-B cross-sectional view of the electronic device provided in fig. 9.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive effort based on the embodiments in the present application are within the scope of protection of the present application. The following embodiments are not independent, and the embodiments can be combined in any way, and the technical features can be combined to form a new technical scheme.
Referring to fig. 1 and fig. 2 together, a fingerprint identification device 10 provided in the present embodiment is applied to an electronic apparatus 1, the fingerprint identification device 10 includes a housing 100, an imaging module 200 and a light supplement element 300, the housing 100 has an accommodating cavity 100a, and an incident portion 100b and an emergent portion 100c disposed at an interval; the imaging module 200 is located in the accommodating cavity 100a, and the imaging module 200 is disposed corresponding to the light incident portion 100 b; the light compensating member 300 is located in the accommodating cavity 100a, the light compensating member 300 is disposed corresponding to the light emitting portion 100c, the light compensating member 300 is configured to emit light to the fingerprint identification area 20a of the electronic device 1 to improve the brightness of the fingerprint identification area 20a, and the imaging module 200 is configured to receive light reflected by a finger of a target object in the fingerprint identification area 20a and obtain a fingerprint image of the target object according to the received light.
The housing 100 may be a metal housing 100, the housing 100 may form a packaging member of the fingerprint recognition device 10, the housing 100 includes a housing cavity 100a, an incident portion 100b and an emergent portion 100c, the incident portion 100b and the emergent portion 100c may be virtual structures, in one embodiment, the incident portion 100b is an incident hole, the emergent portion 100c is an emergent hole, the incident hole is communicated with the housing cavity 100a, the emergent hole is communicated with the housing cavity 100a, the imaging module 200 is mounted on the incident portion 100b and is located in the housing cavity 100a, and the light compensating member 300 is mounted on the emergent portion 100c and is located in the housing cavity 100 a. The electronic device 1 has a liquid crystal panel 20, and the fingerprint identification area 20a is located on the liquid crystal panel 20. The light supplement member 300 is used to emit light toward the liquid crystal panel 20 to improve the brightness of the fingerprint identification area 20a of the liquid crystal panel 20. When the finger of the target object is attached to the fingerprint identification area 20a of the liquid crystal panel 20, the finger of the target object can reflect the light emitted by the light supplement component 300, so that the reflected light is received by the imaging module 200, and the imaging module 200 obtains the fingerprint image of the target object according to the received light. Carry out the light filling through light filling piece 300 to the fingerprint identification district 20a of liquid crystal display panel 20, when target object's finger was laminated in fingerprint identification district 20a, can be so that the fingerprint image is more clear, helps improving the imaging quality of fingerprint identification device 10. It is understood that, in other embodiments, the light incident portion 100b and the light exiting portion 100c may be solid structures, and the light incident portion 100b and the light exiting portion 100c may be transparent substrates.
The light compensating member 300 may be an LED lamp, the number of the LED lamps may be one or multiple, and the light emitting surfaces of the LED lamps face the same direction and all face the fingerprint identification area 20a of the liquid crystal panel 20. In one embodiment, all the LED lamps may emit light at the same time to increase the brightness of the fingerprint recognition area 20a of the liquid crystal panel 20. It is understood that in other embodiments, some of the LED lamps emit light and some of the LED lamps are turned off to improve the brightness of the local area of the liquid crystal panel 20. Further, the light compensating member 300 may be an infrared LED lamp, which has a strong penetrating power to reduce the loss of light transmission, so as to improve the fingerprint recognition sensitivity of the fingerprint recognition device 10.
The fingerprint identification device 10 that this application embodiment provided, all accept the chamber 100a of acceping that light filling piece 300 and formation of image module 200 accept in casing 100 in, improved the integrated level of fingerprint identification device 10, and light filling piece 300 does not additionally occupy the space of fingerprint identification device 10, helps realizing the compactification of fingerprint identification device 10 and arranges. Carry out the light filling through light filling piece 300 to liquid crystal panel 20's fingerprint identification district 20a, can improve the luminance in fingerprint identification district 20a, when target object's finger laminating in liquid crystal panel 20, imaging module 200 can obtain comparatively clear target object's fingerprint image to can improve fingerprint identification device 10's imaging quality, and then improve fingerprint identification device 10's fingerprint identification sensitivity.
Referring to fig. 3 and 4, the light incident portion 100b and the light emergent portion 100c are located on the same sidewall forming the accommodating cavity 100a, the light compensating member 300 includes a plurality of light compensating lamps 310, the plurality of light compensating lamps 310 are disposed around the imaging module 200, a spacer 400 is disposed between the light compensating lamps 310 and the imaging module 200, and the spacer 400 is used for blocking light emitted by the light compensating lamps 310 from being directly transmitted to the imaging module 200.
The light supplement lamp 310 may be an LED lamp. Light filling lamp 310 surround in imaging module 200's week side, light filling lamp 310 with be provided with separator 400 between the imaging module 200, separator 400 is used for keeping apart the light that light filling lamp 310 sent to avoid light filling lamp 310 towards one side light leak of imaging module 200, if the light that light filling lamp 310 sent towards imaging module 200 light leak, then can cause crosstalk to the received reflection light of imaging module 200, influence fingerprint identification device 10's imaging quality. Block through isolator 400 that light direct transmission that light filling lamp 310 sent to formation of image module 200, help improving the imaging quality of fingerprint identification device 10.
Referring to fig. 5, the housing 100 is made of a heat conductive material, the fingerprint identification device 10 further includes a heat dissipation substrate 450, the heat dissipation substrate 450 is located in the accommodating cavity 100a, and the heat dissipation substrate 450 is used for carrying the light compensating element 300 so as to conduct heat generated by the light compensating element 300 to the housing 100.
Wherein the housing 100 may be a metal housing 100. Specifically, the heat dissipation substrate 450 is fixed to the inner wall of the housing 100, the heat dissipation substrate 450 is used for carrying the light supplement 300, and on one hand, the heat dissipation substrate 450 is used for conducting heat generated by the light supplement 300 towards the housing 100, so as to avoid over-high local temperature of the fingerprint identification device 10; and on the other hand, the light-compensating element is used for reflecting the light generated by the light-compensating element 300 towards one side of the liquid crystal panel 20 so as to improve the light utilization rate of the light-compensating element 300.
Referring to fig. 6, in an embodiment, the heat dissipating substrate 450 is an integral structure, the light supplement unit 300 includes a plurality of light supplement lamps 310, the plurality of light supplement lamps 310 are supported on the heat dissipating substrate 450, the heat dissipating substrate 450 is annular and has an opening 450a, the imaging module 200 is accommodated in the opening 450a, a light shielding layer 451 and a heat insulating layer 452 are disposed on the surface of the heat dissipating substrate 450, the light shielding layer 451 and the heat insulating layer 452 are sequentially arranged at intervals and surround the periphery of the imaging module 200, the light supplement lamps 310 are disposed corresponding to the heat insulating layer 452, and the heat insulating layer 452 is configured to conduct heat generated by the light supplement lamps 310 to the housing 100, so as to avoid the problem of over-high local temperature of the fingerprint identification device 10. The light shading layer 451 is used for reflecting light emitted by the light supplementing lamp 310, so that the reflected light is transmitted towards the fingerprint identification area 20a of the liquid crystal panel 20, the utilization rate of the light emitted by the light supplementing lamp 310 is improved, and the imaging quality of the fingerprint identification device 10 is improved by improving the brightness of the fingerprint identification area 20a of the liquid crystal panel 20.
Referring to fig. 7, the imaging module 200 includes an imaging lens 210, a filter 220, and a photosensitive chip 230, the filter 220, and the imaging lens 210 are sequentially stacked and disposed corresponding to the light entering portion 100b, the imaging lens 210 is disposed opposite to the photosensitive chip 230 and away from the light entering portion 100b, the imaging lens 210 is configured to transmit light reflected by a finger of a target object in the fingerprint identification area 20a, the filter 220 is configured to filter light with a preset wavelength, and the photosensitive chip 230 is configured to obtain a fingerprint image of the target object according to the received light.
The imaging lens 210, the filter 220 and the photosensitive chip 230 are all accommodated in the accommodating cavity 100a of the housing 100, the imaging lens 210 is an optical imaging lens 210, and the upper and lower surfaces of the imaging lens 210 are aspheric lenses. The texture structure of the gaps of the fingerprint skin is imaged on the photosensitive chip 230 under the imaging lens 210 to form a clear fingerprint image. The filter 220 is used for filtering the light with preset wavelength, the filter 220 is an infrared filter, which filters out infrared light (such as heat radiation of fingers), and only allows the light with wavelength within 380-760 mm to pass through and image. The housing 100 is used to prevent stray light from entering the photosensitive chip 230 inside to interfere with imaging.
The fingerprint recognition device 10 operates as follows: when the light supplement piece 300 in the fingerprint identification device 10 emits light towards the fingerprint identification area 20a of the liquid crystal panel 20, the fingerprint identification area 20a of the liquid crystal panel 20 can be illuminated by the light supplement piece 300, when a finger of a target object is attached to the fingerprint identification area 20a of the liquid crystal panel 20, the reflection light of the grain and ridge texture characteristics of the finger passes through the light entering part 100b and enters the imaging module 200, then sequentially passes through the imaging lens 210, the filter 220 and the photosensitive chip 230, and is imaged on the photosensitive chip 230 after passing through the imaging lens 210 and the filter 220. The image sensors 231 arranged in an array are arranged on the photosensitive chip 230, and the image sensors 231 perform image processing and feature recognition on the formed fingerprint image, extract required fingerprint information, and realize a fingerprint recognition function.
In one embodiment, the light incident portion 100b is a light incident hole, and the imaging lens 210 includes a plurality of lenses 211, and the plurality of lenses 211 are stacked along an extending direction of the light incident hole.
The imaging lens 210 is configured to converge the light reflected by the finger of the target object in the fingerprint identification area 20a, so that more light enters the photosensitive chip 230 to improve the definition of the fingerprint image. Specifically, a plurality of lens 211 is in filter 220 deviates from filter 220 one side of sensitization chip 230 is arranged at interval in proper order from the direction orientation of being close to filter 220, via during the light that the finger reflection of the target object in fingerprint identification district 20a enters into imaging lens 210, carries out refraction and reflection back many times by a plurality of lenses 211, can present clear image on sensitization chip 230, helps promoting fingerprint identification device 10's imaging quality.
Referring to fig. 8, the imaging module 200 includes a substrate 240 and a photo sensor chip 230, the substrate 240 is disposed adjacent to the light incident portion 100b relative to the photo sensor chip 230, the substrate 240 has a plurality of alignment holes 241 arranged in an array, the photo sensor chip 230 has a plurality of image sensors 231 arranged in an array, the alignment holes 241 and the image sensors 231 are in one-to-one correspondence, the substrate 240 is configured to transmit light reflected by a finger of a target object in the fingerprint identification area 20a, and the photo sensor chip 230 is configured to obtain a fingerprint image of the target object according to the received light.
Wherein the collimating hole 241 utilizes the linear propagation principle of light, similar to the small hole imaging, and the ratio of the depth of the collimating hole 241 to the aperture of the collimating hole 241 is 20: 1. After the light reflected by the finger of the target object in the fingerprint identification area 20a enters the collimating hole 241, the collimating hole 241 may change a transmission path of the light, the collimating hole 241 and the image sensor 231 are in a one-to-one correspondence relationship, after the light passing through the collimating hole 241 is received by the image sensor 231, a clear fingerprint image may be formed on the image sensor 231, and the image sensor 231 performs image processing and feature identification on the formed fingerprint image, extracts required fingerprint information, and implements a fingerprint identification function.
With reference to fig. 9 and fig. 10, an electronic device 1 is further provided in an embodiment of the present application, where the electronic device 1 includes a liquid crystal panel 20, a backlight module 30, and the fingerprint identification device 10 provided in any of the above embodiments, the electronic device 1 has a display area 20A, and the display area 20A has a fingerprint identification area 20A; the backlight module 30 is stacked with the liquid crystal panel 20, the backlight module 30 has a light hole 30a, and the light hole 30a at least partially corresponds to the fingerprint identification area 20 a; the fingerprint recognition device 10 is located on a side of the backlight module 30 away from the liquid crystal panel 20, at least a portion of the fingerprint recognition device 10 is disposed corresponding to the light-transmitting hole 30a, when fingerprint recognition is performed, the light-compensating member 300 emits light toward the light-transmitting hole 30a, the light is reflected by a finger of the target object after passing through the fingerprint recognition area 20a, and the imaging module 200 receives the light reflected by the finger of the target object and obtains a fingerprint image of the target object according to the light.
The electronic device 1 may be any device having communication and storage functions. For example: the system comprises intelligent equipment with a network function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like.
The liquid crystal panel 20 is used to display images and text information. The backlight module 30 is stacked with the liquid crystal panel 20, and the backlight module 30 is used for providing light to the liquid crystal panel 20, so that the liquid crystal panel 20 displays images and text information.
Reference is made to the foregoing description for the fingerprint recognition device 10, which is not repeated here.
The liquid crystal panel 20 has a display area 20A, and the display area 20A has a fingerprint identification area 20A. In one embodiment, the area size of the fingerprint identification area 20A is consistent with the area size of the display area 20A, and in this case, a full-screen fingerprint may be implemented, that is, the entire display area 20A of the liquid crystal panel 20 may be used as the fingerprint identification area 20A to identify the fingerprint image of the target object, so that the sensitivity of blind fingerprint identification may be improved.
In one embodiment, the light-transmissive holes 30a are disposed opposite to the fingerprint identification area 20a, and the radial dimension of the light-transmissive holes 30a is consistent with the radial dimension of the fingerprint identification area 20 a. When the finger of target object is laminated in fingerprint identification district 20a, the light that light supplementing piece 300 sent pierces through light trap 30a enters into fingerprint identification district 20a, when the area size of fingerprint identification district 20a keeps unanimous with the area size in light trap 30a place region, sees through the light of light trap 30a can be better carries out the light supplementing to fingerprint identification district 20a to make target object's finger image comparatively clear, when the light after target object's finger reflection is received by imaging module 200, can obtain clear fingerprint image on imaging module 200, help improving fingerprint identification device 10's formation of image quality, and then improve fingerprint identification device 10's identification sensitivity.
In one embodiment, the light incident portion 100b is at least partially disposed opposite to the light hole 30a, and the light emergent portion 100c is at least partially disposed opposite to the light hole 30 a. At this moment, the light that light filling piece 300 sent in light-emitting portion 100c gets into light trap 30a that can be fine, and pierces through light trap 30a enters into fingerprint identification district 20a to the light that is located after the finger reflection of the target object in fingerprint identification district 20a can be fine enters into imaging module 200 in light-emitting portion 100b, help improving the utilization ratio of light, can make better light enter into imaging module 200 in, thereby avoid effective light to lose and lead to the fingerprint image disappearance, and then arouse the problem that fingerprint identification sensitivity reduces. The effective light ray refers to a light ray carrying a fingerprint image of the target object.
The electronic device 1 provided by the embodiment of the application, set up the fingerprint identification device 10 in the one side that backlight unit 30 deviates from liquid crystal panel 20, all accept the light filling piece 300 and the imaging module 200 of fingerprint identification device 10 in the chamber 100a of accepting of casing 100, the integrated level of fingerprint identification device 10 has been improved, and light filling piece 300 does not additionally occupy the space of fingerprint identification device 10, help realizing the compactification of fingerprint identification device 10 and arrange, and then save the inner space of electronic device 1. In addition, carry out the light filling through light filling piece 300 to liquid crystal panel 20's fingerprint identification district 20a, can improve the luminance in fingerprint identification district 20a, when target object's finger laminating in liquid crystal panel 20, light after target object's finger reflection enters into imaging module 200, imaging module 200 can obtain comparatively clear target object's fingerprint image to can improve fingerprint identification device 10's imaging quality, and then improve fingerprint identification device 10's fingerprint identification sensitivity.
Referring to fig. 11, at least a portion of the housing 100 is accommodated in the light hole 30a, a light shielding adhesive 500 is disposed between the housing 100 and the light hole 30a, the light shielding adhesive 500 is used for blocking light emitted by the light compensating member 300 from being transmitted toward a side of the liquid crystal panel 20 adjacent to the fingerprint identification device 10, and the light shielding adhesive 500 is further used for fixing the housing 100 to the backlight module 30.
Specifically, the light shielding glue 500 is disposed in a gap between the housing 100 and the fingerprint recognition device 10, and the light shielding glue 500 has viscosity and can be used to fix the housing 100 and the fingerprint recognition device 10. The light shielding adhesive 500 also has a low light transmittance, and can block light emitted from the light compensating member 300 from being transmitted toward a side of the liquid crystal panel 20 adjacent to the fingerprint recognition device 10. That is, the light shielding glue 500 can make more light emitted from the light compensating member 300 enter the fingerprint identification area 20a of the liquid crystal panel 20, so as to improve the brightness of the fingerprint identification area 20 a. When the finger of target object was laminated in liquid crystal display panel 20's fingerprint identification district 20a, the finger line of target object can be illuminated by light, reflects light when the finger line to when making the light after the reflection enter into imaging module 200, can form comparatively clear fingerprint image in imaging module 200, thereby help improving fingerprint identification device 10's fingerprint identification sensitivity.
Referring to fig. 12, the electronic device 1 further includes a light guide pillar 550, one end of the light guide pillar 550 at least partially faces the light emitting surface of the light compensating member 300, the other end of the light guide pillar 550 opposite to the light emitting surface extends into the light hole 30a, and the light guide pillar 550 is configured to guide the light emitted from the light compensating member 300 into the light hole 30a, so as to improve the brightness of the liquid crystal panel 20 corresponding to the fingerprint identification area 20 a.
The light guide post 550 is used for guiding light emitted by the light supplement component 300 towards the light transmission hole 30a, so that the light enters the fingerprint identification area 20a through the light transmission hole 30a, and the brightness of the fingerprint identification area 20a is further improved. When the finger of the target object is attached to the fingerprint identification area 20a of the liquid crystal panel 20, the finger can reflect the light entering the fingerprint identification area 20a, so that the reflected light is received by the imaging module 200 to complete the acquisition of the fingerprint image of the target object.
Specifically, the light guide bar 550 includes a first end 551 and a second end 552 opposite to each other, the first end 551 at least partially faces the light emitting surface of the light supplement member 300, the second end 552 extends into the light transmission hole 30a, and the light emitted from the light supplement member 300 is transmitted from the first end 551 to the second end 552, and then passes through the light transmission hole 30a to enter the fingerprint identification area 20a, so as to improve the brightness of the fingerprint identification area 20 a.
In one embodiment, the light guide pillar 550 is perpendicular to the plane of the liquid crystal panel 20, and the light guide pillar 550 is disposed to avoid the light incident portion 100 b. Specifically, when the light guide pillar 550 is perpendicular to the plane where the liquid crystal panel 20 is located, and the light emitted by the light supplement member 300 is transmitted into the light transmission hole 30a through the light guide member 32, the transmission path of the light emitted by the light supplement member 300 is shortest, the light loss is minimum, and the utilization rate of the light emitted by the light supplement member 300 is favorably improved.
Referring to fig. 13, in another embodiment, the light guide pillar 550 is disposed obliquely relative to the plane of the liquid crystal panel 20, and the projection of the light guide pillar 550 on the housing 100 is located in the housing 100, at this time, the light emitted by the light supplement 300 enters the light hole 30a through the guiding effect of the light guide pillar 550, and after being reflected by the finger of the target object in the fingerprint identification area 20a, more reflected light can enter the imaging module 200, so as to improve the utilization rate of the light, which is helpful for improving the identification accuracy of the fingerprint identification device 10.
In other embodiments, the light supplement member 300 includes a plurality of light supplement lamps 310, the electronic device 1 includes a plurality of light guide columns 550, the light guide columns 550 correspond to the light supplement lamps 310 one by one, that is, one light supplement lamp 310 is correspondingly provided with one light guide column 550, so that light emitted by the light supplement lamp 310 is transmitted into the light hole 30a through the light guide column 550, and the brightness of the fingerprint identification area 20a is further improved.
Referring to fig. 14, the backlight module 30 includes a supporting plate 31 and a light guide 32 supported on the supporting plate 31, the light hole 30a is a through hole, the light hole 30a is located on the supporting plate 31, a portion of the light hole 30a is disposed corresponding to the fingerprint identification area 20a, and another portion of the light hole 30a is located outside the fingerprint identification area 20 a.
Specifically, in the present embodiment, the light-transmitting hole 30a is a through hole, and the supporting plate 31 is provided with the light-transmitting hole 30a, so that when the light emitted from the light-compensating member 300 is transmitted into the light-transmitting hole 30a, the light can pass through the light-guiding member 32 and the liquid crystal panel 20 and enter the fingerprint identification area 20a, thereby improving the brightness of the fingerprint identification area 20 a. When the finger of target object was laminated in liquid crystal display panel 20's fingerprint identification district 20a, can be so that the fingerprint line of finger presents more clear image, that is to say, can be so that imaging module 200 obtains comparatively clear fingerprint image to improve fingerprint identification device 10's identification accuracy.
Further, the area of the area where the light-transmitting hole 30a is located on the liquid crystal panel 20 is projected to cover the fingerprint identification area 20a, that is, the area of the area where the light-transmitting hole 30a is located is larger than the area of the fingerprint identification area 20a, the light-transmitting hole 30a can be circular, the fingerprint identification area 20a can be oval or irregular, the light passing through the light-transmitting hole 30a can fully illuminate the fingerprint identification area 20a, when the finger of the target object is attached to the fingerprint identification area 20a, the light passing through the light-transmitting hole 30a can illuminate the fingerprint grain of the target object, so that the finger of the target object presents a clearer fingerprint image, and the fingerprint image can be better formed on the imaging module 200.
Referring to fig. 15, the backlight module 30 includes a supporting plate 31 and a light guide member 32 carried on the supporting plate 31, the supporting plate 31 has a first through hole 31a, the light guide member 32 has a second through hole 32a, the first through hole 31a at least partially faces the second through hole 32a, and the light holes 30a at least include the first through hole 31a and the second through hole 32 a.
Specifically, in one embodiment, the first through hole 31a faces the second through hole 32a, and the first through hole 31a and the second through hole 32a together form the light-transmitting hole 30a, and the light emitted from the light-compensating member 300 can enter the fingerprint identification area 20a through the first through hole 31a and the second through hole 32a at a time, so as to improve the brightness of the fingerprint identification area 20 a. When the finger of target object was laminated in fingerprint identification district 20a, can be so that target object's finger presents clear fingerprint line, reflects the light that light filling piece 300 sent through the finger to make the light after the reflection received by imaging module 200, can present clear fingerprint image on imaging module 200, and then can improve fingerprint identification device 10's recognition accuracy.
Further, the radial dimension of the first through hole 31a is smaller than the radial dimension of the second through hole 32a, and the central axis of the first through hole 31a and the central axis of the second through hole 32a are kept coincident. Because the light emitted from the light-compensating member 300 is tapered and the supporting plate 31 is disposed adjacent to the light-compensating member 300 relative to the light-guiding member 32, when the radial dimension of the first through hole 31a is smaller than the radial dimension of the second through hole 32a, the light emitted from the light-compensating member 300 can enter the fingerprint identification area 20a through the first through hole 31a and the second through hole 32a more, so as to improve the brightness of the fingerprint identification area 20 a. When the finger of target object was laminated in fingerprint identification district 20a, can be so that target object's finger presents clear fingerprint line, reflects the light that light filling piece 300 sent through the finger to make the light after the reflection received by imaging module 200, can present clear fingerprint image on imaging module 200, and then can improve fingerprint identification device 10's recognition accuracy.
With continuing reference to fig. 16, 17 and 18, the backlight module 30 further includes a backlight source 33, the backlight 33 includes a plurality of sub-light sources 34, the light guide member 32 includes a sidewall 321 and a first light guide portion 322 and a second light guide portion 323 adjacent to each other, the side walls 321 are located at a side of the first light guide part 322 facing away from the second light guide part 323, the housing 100 comprises a first portion 101 and a second portion 102, which are adjacent to each other, a projection of the first portion 101 on the light guide member 32 is located at the first light guide portion 322, the projection of the second portion 102 on the light guide member 32 is located at the second light guide portion 323, a plurality of sub-light sources 34 are arranged at intervals on the sidewall 321, the light supplement piece 300 includes a plurality of light supplement lamps 310, and the intensity of the light supplement lamps 310 arranged in the second portion 102 is greater than the intensity of the light supplement lamps 310 arranged in the first portion 101.
Among them, the backlight 33 and the light compensating member 300 are independently controlled light emitting devices. When the backlight 33 is turned off and only the light compensating member 300 is turned on, the fingerprint identification area 20a emits light, and the other area of the liquid crystal panel 20 excluding the fingerprint identification area 20a is in a black screen state, i.e., the other area of the liquid crystal panel 20 excluding the fingerprint identification area 20a does not display. At this time, the entire liquid crystal panel 20 is not required to be lit, and only the fingerprint identification area 20a is lit, so that the process of obtaining a fingerprint image can be completed. When the backlight 33 is turned on and the light supplement element 300 is turned off, light can be provided to the fingerprint identification area 20a through the backlight 33, and the backlight 33 is used for providing light for the display of the liquid crystal panel 20 on one hand and providing light for the fingerprint identification area 20a on the other hand, which provides a challenge for the coordination between the brightness adjustment of the liquid crystal panel 20 and the brightness adjustment of the fingerprint identification area 20 a. Moreover, the backlight module 30 can shield the light emitted from the backlight source 33 to a certain degree, so that the brightness of the fingerprint identification area 20a cannot be improved well. When the backlight 33 is turned on and the light supplement element 300 is turned on, at this time, all regions of the liquid crystal panel 20 are in a bright screen state, and the brightness of the fingerprint identification area 20a can be flexibly adjusted by the light supplement element 300, which is helpful for improving the imaging quality of the fingerprint identification device 10.
The light guide member 32 has a side wall 321 and a first light guide portion 322 adjacent to the side wall 321, the second light guide portion 323 is located on a side of the first light guide portion 322 away from the side wall 321, the first light guide portion 322 is adjacent to the second light guide portion 323, a projection of the first portion 101 of the housing 100 on the light guide member 32 is located in the first light guide portion 322, a projection of the second portion 102 of the housing 100 on the light guide member 32 is located in the second light guide portion 323, when the plurality of sub light sources 34 are arranged on the side wall 321 of the light guide member 32 at intervals, because the first light guide portion 322 of the light guide member 32 is located adjacent to the side wall 321 of the light guide member 32, the plurality of sub light sources 34 arranged on the side wall 321 of the light guide member 32 can well illuminate the first light guide portion 322, so that the brightness of the first light guide portion 322 is greater than the brightness of the second light guide portion 323, for this reason, the brightness of the side of the fingerprint identification area 20a close to the first light guide portion 322 is also greater than the side of the fingerprint identification area 20a close to the second light guide portion 323 The brightness of the target object is not favorable for better obtaining the fingerprint image of the target object. In order to solve the problem, the intensity of the light supplement lamp 310 arranged on the second portion 102 of the housing 100 is greater than the intensity of the light supplement lamp 310 arranged on the first portion 101 of the housing 100, so that more light emitted by the light supplement lamp 310 is transmitted to the second light guide portion 323 correspondingly arranged with the second portion 102, and further more light supplement is performed on the portion, close to one side of the second light guide portion 323, of the fingerprint identification area 20a, so that the brightness of the fingerprint identification area 20a is more uniform, a clearer fingerprint image can be obtained when a finger of a target object is attached to the fingerprint identification area 20a, and the improvement of the identification accuracy of the fingerprint identification device 10 is facilitated.
Further, the sub-light sources 34 of the second portion 102 are distributed in a crescent shape, and the density of the sub-light sources 34 distributed from the two ends to the middle is gradually increased, so that the dark space problem caused by the opening of the light guide member 32 can be fully compensated, the brightness of the fingerprint identification area 20a is uniform, a clear fingerprint image can be obtained when the finger of the target object is attached to the fingerprint identification area 20a, and the fingerprint identification accuracy of the fingerprint identification device 10 is improved.
With reference to fig. 19, the electronic device 1 further includes a middle frame 40, the liquid crystal panel 20 and the backlight module 30 are carried on the middle frame 40, the middle frame 40 has a mounting hole 41, the fingerprint identification device 10 is located in the mounting hole 41, and a radial dimension of the mounting hole 41 is smaller than a radial dimension of the light hole 30 a.
Specifically, the fingerprint identification device 10 is fixed to the middle frame 40, and the liquid crystal panel 20 and the backlight module 30 are supported on the middle frame 40, so that at least a portion of the fingerprint identification device 10 faces the fingerprint identification area 20a of the liquid crystal panel 20, when the light supplement element 300 in the fingerprint identification device 10 emits light towards the light transmission hole 30a of the backlight module 30, the light passes through the light transmission hole 30a and enters the fingerprint identification area 20a, and the brightness of the fingerprint identification area 20a can be improved. When the finger of target object was laminated in fingerprint identification district 20a, the finger line can comparatively clear present to imaging module group 200 obtains comparatively clear fingerprint image, and then promotes fingerprint identification device 10's fingerprint identification precision.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (14)
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| CN201910741334.7A CN110458105B (en) | 2019-08-12 | 2019-08-12 | Fingerprint identification device and electronic equipment |
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| CN201910741334.7A CN110458105B (en) | 2019-08-12 | 2019-08-12 | Fingerprint identification device and electronic equipment |
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| CN113361298A (en) * | 2020-03-02 | 2021-09-07 | Oppo广东移动通信有限公司 | Electronic device |
| CN111629135A (en) * | 2020-05-27 | 2020-09-04 | 维沃移动通信有限公司 | Camera modules and electronic equipment |
| CN112485947B (en) * | 2020-12-09 | 2022-08-16 | 武汉天马微电子有限公司 | Display module and display device |
| CN113687543B (en) * | 2021-09-07 | 2023-05-12 | 厦门天马微电子有限公司 | Display module and display device |
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| CN207924694U (en) * | 2018-02-27 | 2018-09-28 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition module and equipment |
| CN208386629U (en) * | 2018-06-02 | 2019-01-15 | Oppo广东移动通信有限公司 | Electronic equipment |
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| CN207924694U (en) * | 2018-02-27 | 2018-09-28 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition module and equipment |
| CN208386629U (en) * | 2018-06-02 | 2019-01-15 | Oppo广东移动通信有限公司 | Electronic equipment |
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