CN109564627B - Under-screen optical fingerprint device with optical fingerprint anti-counterfeiting sensing function and handheld device - Google Patents
Under-screen optical fingerprint device with optical fingerprint anti-counterfeiting sensing function and handheld device Download PDFInfo
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- CN109564627B CN109564627B CN201880002092.3A CN201880002092A CN109564627B CN 109564627 B CN109564627 B CN 109564627B CN 201880002092 A CN201880002092 A CN 201880002092A CN 109564627 B CN109564627 B CN 109564627B
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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
The application discloses an under-screen optical fingerprint device with an optical fingerprint anti-counterfeiting sensing function and a handheld device. The under-screen optical fingerprint device is used for sensing the fingerprint of a specific object and comprises an optical input device; the optical input device comprises a plurality of first light sensing elements and a plurality of second light sensing elements, wherein the first light sensing elements are used for receiving visible light reflected by the specific object, and the second light sensing elements are used for receiving invisible light reflected or emitted by the specific object and not receiving visible light reflected by the specific object; therefore, the invisible light intensity obtained by the second light sensing element of the optical input device is weak, and is used as a basis for eliminating the false finger using the correct fingerprint to operate the full-screen mobile phone, so that the anti-counterfeiting function of the optical fingerprint is effectively improved.
Description
Technical Field
The present application relates to optical fingerprint devices, and more particularly, to an under-screen optical fingerprint device with an optical fingerprint anti-counterfeit sensing function.
Background
In the past, fingerprint capturing mainly uses capacitive sensing fingerprint, and in recent years, full-screen mobile phones have become trend, wherein optical under-screen fingerprint is one of the current mainstream methods.
In the past, the false fingerprint can be distinguished from a real finger and a sampling false finger by a capacitive circuit sensing design aiming at non-biological false fingerprint anti-counterfeiting, but a full-screen mobile phone adopting an optical on-screen fingerprint sensing technology is used for distinguishing fingerprint characteristics by capturing fingerprint images through optical reflection, so that the real finger and the sampling false finger cannot be distinguished through electrical characteristics.
Thus, when a person in charge obtains the fingerprint of a legal user and makes a fake finger, the fake finger can be used for identifying the fingerprint of the full-screen mobile phone of the legal user, so that the full-screen mobile phone can be stolen.
Therefore, the anti-counterfeiting mechanism of the full-screen mobile phone adopting the optical under-screen fingerprint sensing technology on the optical fingerprint needs to be further improved and innovated.
Disclosure of Invention
The present application discloses an under-screen optical fingerprint device and a handheld device with an optical fingerprint anti-counterfeit sensing function, which solve the above problems.
An embodiment of the application discloses an under-screen optical fingerprint device with an optical fingerprint anti-counterfeiting sensing function. The under-screen optical fingerprint device comprises an optical input device; wherein the optical input device comprises: a plurality of first light sensing elements for receiving visible light reflected by the specific object; and at least one second light sensing element for receiving the invisible light reflected or emitted by the specific object and not receiving the visible light reflected by the specific object.
The under-screen optical fingerprint device disclosed by the application obtains an optical image of the finger fingerprint outside the display screen through the first light sensing component in the optical input device, and further obtains a large amount of invisible light reflected by the finger of the human body through the second light sensing component, so as to distinguish the real finger from the fake finger.
Another embodiment of the application discloses a handheld device with an optical fingerprint anti-counterfeiting sensing function. The hand-held device comprises: the display screen assembly comprises a display panel and a protective cover plate, wherein the display panel is provided with a first side and a second side opposite to the first side, and the protective cover plate is arranged on the second side of the display panel; and an optical input device comprising: the first light sensing elements are arranged on the first side of the display panel and used for receiving visible light reflected by the specific object; and at least one second light sensing element for receiving the invisible light reflected or emitted by the specific object and not receiving the visible light reflected by the specific object.
According to the handheld device disclosed by the application, the first light sensing component is used for obtaining the optical fingerprint image, and the second light sensing component is matched with the first light sensing component to obtain a large amount of invisible light reflected by human fingers, so that the invisible light is used as a basis for eliminating fake fingers, and the fingerprint anti-counterfeiting capacity of the handheld device is improved.
Drawings
Fig. 1A is an external view of a handheld device with an optical fingerprint anti-counterfeit sensing function according to the present application.
Fig. 1B is a schematic structural diagram of the display screen of fig. 1A.
FIG. 2 is a top view of one embodiment of an optical input device of a display screen of the present application.
FIG. 3 is a schematic cross-sectional view of the line A-A of FIG. 2.
Fig. 4 is another cross-sectional view of the line A-A of fig. 2.
Fig. 5 is a further schematic cross-sectional view of the line A-A of fig. 2.
Fig. 6 is a further schematic cross-sectional view of the line A-A of fig. 2.
Fig. 7 is a schematic structural diagram of a second embodiment of a display screen with an optical fingerprint anti-counterfeiting sensing function.
Fig. 8 is a schematic structural diagram of a third embodiment of a display screen with an optical fingerprint anti-counterfeiting sensing function according to the present application.
Wherein reference numerals are as follows:
1. display screen
10. Display screen assembly
100. Hand-held device
11. Display panel
11a second side
11b first side
12. Protective cover plate
20. 20a, 20b, 20c optical input device
30. First light sensing component
31. First substrate
311. First light sensing region
32. First color filter
33. First lens
40. 40a, 40b, 40c second photo-sensing component
41. Second substrate
411. 411a second photo-sensing region
42. 42a second color filter
43. 43a second lens
431. Optical coating
L1 ray
L11 visible light
L12, L12' invisible light
50. 51 object
60. Invisible light Rifler
Detailed Description
Certain terms are used throughout the description and following claims to refer to particular components. Those of skill in the art will understand that a manufacturer may refer to the same component in different terms. The present specification and the claims set forth below do not use the difference in names as a means of distinguishing components, but use the difference in functions of components as a basis for distinguishing. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.
The display screen with the optical fingerprint anti-counterfeiting sensing function can acquire invisible light reflected or emitted by a real human (living) finger, so that the difference between the real finger and the fake finger is realized, the anti-counterfeiting safety of the fingerprint under the optical screen is effectively improved, and the technical content of the display screen is described in detail by matching with a plurality of embodiments and drawings.
Referring to fig. 1A and 1B, a handheld device 100 of the present application is used for sensing fingerprints of a specific object 50, 51, and includes a display 1, and a first embodiment of the display includes a display assembly 10 and an optical input device 20. Wherein the handheld device 100 may be any handheld electronic device such as a smart phone, a personal digital assistant, a handheld computer system, or a tablet computer.
The display assembly 10 at least comprises a display panel 11 and a protective cover 12; the display panel 11 has a first side and a second side 11a opposite to the first side 11b, and the protective cover 12 is disposed on the second side 11a of the display panel 11. The display panel 11 emits a plurality of kinds of visible light L1 of different wavelength ranges by driving to display a color image. In the present embodiment, the display panel 11 may be an Organic Light Emitting Display (OLED), but is not limited thereto.
The optical input device 20 is disposed on the first side 11b of the display panel 11 of the display assembly 10, that is, the display panel 11 is located between the optical input device 20 and the protective cover 12. The optical input device 20 includes a plurality of first light sensing elements 30 and at least one second light sensing element 40; as further shown in fig. 2, the first light sensing elements 30 and the second light sensing elements 40 may be arranged in a matrix. It should be noted that the number of the first light sensing elements 30 and the second light sensing elements 40 included in the optical input device 20 is not limited in the present application, but mesh of the first light sensing elements is larger than that of the at least one second light sensing element, and in fact, the arrangement of the second light sensing elements 40 of the optical input device 20 is not limited, and any number of pixels 14 arranged in any manner may be included. Preferably, the second photo-sensing elements 40 are uniformly arranged in the first photo-sensing elements 30 in a relatively sparse manner, for example, n×n first photo-sensing elements 30 are provided with a second photo-sensing element 40, where n×n may be 4*4, 8×8, 16×16 …, etc., and may be adjusted according to different applications.
When a specific object 50, 51 approaches the protective cover 12 of the display assembly 10, the object 50, 51 reflects a portion of the visible light L11 emitted by the display panel 11. If the specific object 50 is a part of a human body, such as a finger, the invisible light L12 is reflected at the same time; conversely, if the specific object 51 is not a part of the real human body, for example, if the specific object 51 is a fake finger, the specific object absorbs most of the invisible light L12, but reflects only the visible light L11 and a relatively small amount of the invisible light L12 'relative to the specific object 50, in other words, the intensity of the invisible light L12' may be zero, approach zero or far less than the invisible light L12, so that by determining the intensity of the invisible light reflected by the object 50 and the object 51, it is possible to distinguish whether the object 50 and the object 51 are the real human body.
The first light sensing element 30 of the optical input device 20 is configured to receive the visible light L11 reflected by the objects 50 and 51 located outside the protective cover 12, and obtain two-dimensional image information of the objects 50 and 51. The two-dimensional image information is a two-dimensional fingerprint image; therefore, fingerprint characteristics can be identified according to the two-dimensional fingerprint image.
The second light sensing element 40 of the optical input device 20 is configured to receive the invisible light L12 and L12' reflected by the objects 50 and 51 located outside the protective cover 12, and to identify the real and false objects 50 and 51 by obtaining the intensity of the invisible light. The true object 50 as referred to herein refers to a portion of a human body, such as a finger; in contrast, the dummy object 51 is not a part of the human body. Therefore, the fingerprint can be identified according to the intensity of invisible light. Preferably, the invisible light L2 refers to invisible infrared light, especially near infrared light (wavelength range of 800-2500 nm).
Referring to fig. 3, the optical input device 20 in fig. 3 is a schematic cross-sectional view of an embodiment of the optical input device, in which each first light sensing element 30 includes a first substrate 31, a first light sensing region 311, a first color filter 32 and a first lens 33, and each second light sensing element 40 includes a second substrate 41, a second light sensing region 411, a second color filter 42 and a second lens 43a. In the present embodiment, the first substrate 31 and the second substrate 41 are the same, the first light sensing region 311 and the second light sensing region 411 are the same, the first color filter 32 and the second color filter 42 are the same, and the has the first lens 33 and the second lens 43a different.
Referring to fig. 1 and fig. 3, in the present embodiment, the first photosensitive region 311 and the second photosensitive region 411 are doped in the first substrate 31 and the second substrate 41 respectively with the same photosensitive material; the first color filter 32 and the second color filter 42 are respectively disposed on the first substrate 31 and the second substrate 41 to cover the first light sensing region 311 and the second light sensing region 411 respectively; the first lens 33 is disposed on the first color filter 32, and allows the visible light L11 to pass through the first lens 33 from outside the first lens 33 into the first color filter 32, and the visible light L11 passes through the first color filter 32 and is received by the first light sensing region 311. An optical image of the object 50 or the object 51 may be obtained by the first light sensing element 30. The second lens 43a is disposed on the second color filter 42, and the second lens 43a has an optical coating 431 covering the outer surface of the second lens 43a, wherein the optical coating 431 can filter out the visible light L11 into the second lens 43a, in other words, the second lens 43a only passes through the invisible light L12, L12'. Therefore, by the intensity of the invisible light L12, L12' received by the second light sensing component 40, it can be determined whether the object 50, 51 outside the display screen 1 is a real finger.
Referring to fig. 4 again, the optical input device 20a in fig. 4 is a schematic cross-sectional view of another embodiment of the optical input device 20, in which each first light sensing element 30 includes a first substrate 31, a first light sensing region 311, a first color filter 32 and a first lens 33, and each second light sensing element 40a includes a second substrate 41, a second light sensing region 411, a second color filter 42a and a second lens 43. In the present embodiment, the second substrate 41 of the first substrate 31 and the second light sensing device 40a is the substrate sharing the same material, the first substrate 31 and the second substrate 41 are the same, the first light sensing region 311 and the second light sensing region 411 are the same, the first lens 33 and the second lens 43 are the same, and the are different from the first color filter 32 and the second color filter 42 a.
Referring to fig. 1 and fig. 4, in the present embodiment, the first photosensitive region 311 and the second photosensitive region 411 are doped with the same photosensitive material in the first substrate 31 and the second substrate 41, respectively; the first color filter 32 and the second color filter 42a are respectively disposed on the first substrate 31 and the second substrate 41 to cover the first light sensing region 311 and the second light sensing region 411 respectively; the first color filter 32 can pass the visible light L11 with a specific wavelength range, and the second color filter 42a can pass only the invisible light L12, L12' with an invisible wavelength range, and filter out the visible light L11. Therefore, by the intensity of the invisible light L12, L12' received by the second light sensing component 40, it can be determined whether the object 50, 51 outside the display screen 1 is a real finger.
Referring to fig. 5 again, the optical input device 20b in fig. 5 is a schematic cross-sectional view of still another embodiment of the optical input device 20, in which each first light sensing element 30 includes a first substrate 31, a first light sensing region 311, a first color filter 32 and a first lens 33, and each second light sensing element 40b includes a second substrate 41, a second light sensing region 411a, a second color filter 42 and a second lens 43. In the present embodiment, the first substrate 31 and the second substrate 41 are the same, the first color filter 32 and the second color filter 42 are the same, the first lens 33 and the second lens 43 are the same, and the has the first light sensing region 311 and the second light sensing region 411a different.
Referring to fig. 1 and fig. 5, in the present embodiment, the first photo-sensing region 311 and the second photo-sensing region 411a are doped with different photo-sensing materials in the first substrate 31 and the second substrate 41 respectively; the first photo-sensing region 311 is doped with a material sensitive to visible light, and the second photo-sensing region 411a is doped with a material sensitive to invisible light, which is equivalent to an infrared diode, for example. In the present embodiment, when the reflected visible light L11 and the invisible light L12, L12 'enter the second light sensing element 40b, only the invisible light L12, L12' is received by the second light sensing area 411a, so that the second light sensing element 40b can determine whether the object 50, 51 outside the display screen 1 is a real finger or not.
Referring to fig. 1 and fig. 6, the optical input device 20c in fig. 6 is a schematic cross-sectional view of still another embodiment of the optical input device 20, and it can be seen that in this embodiment, the second light sensing element 40c of the optical input device 20c is combined with the embodiments of fig. 3, fig. 4 and fig. 5, specifically, the second light sensing element 40c includes the second lens 43a of fig. 3, the second color filter 42a of fig. 4 and the second light sensing area 411a of fig. 5, and can also be implemented to receive only the invisible light L12 reflected by the object outside the display screen 1 as a basis for determining whether the object 50 is a part of a human body. In addition, the second light sensing device 40c of the optical input device 20 of the present application can also combine the second lens 43a and the second color filter 42a of fig. 3 and 4, or combine the second color filter 42a and the second light sensing area 411a of the embodiment of fig. 4 and 5, or combine the second lens 43a and the second light sensing area 411a of the embodiment of fig. 3 and 5 to achieve the same effect.
As described above, the optical input device of the present application can determine whether the object 50, 51 is a part of the human body through the weak intensity of the invisible light reflected or emitted by the object 50, 51. As shown in fig. 7, the display screen assembly 10 of the present application may further include an invisible light emitter 60, wherein the invisible light emitter 60 may be disposed between the protective cover 12 and the display panel 11, but the disclosure is not limited thereto; in some embodiments, as shown in FIG. 8, the invisible light emitter 60 may be disposed beside the optical input device 20, i.e., on the inner side 11b of the display panel 11.
In summary, when the display screen with the optical fingerprint anti-counterfeiting sensing function disclosed by the application is used for fingerprint identification of human body, the first optical sensing component in the optical input device is used for obtaining the optical image of the fingerprint outside the display screen, and the second optical sensing component is used for further obtaining the invisible light reflected by a large amount of human body finger so as to exclude the use of non-human body finger with correct fingerprint image, and a second protection mechanism is added.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (19)
1. An under-screen optical fingerprint device with an optical fingerprint anti-counterfeiting sensing function, which is used for sensing a fingerprint of a specific object, and is characterized in that the under-screen optical fingerprint device comprises:
an optical input device, comprising:
a plurality of first light sensing elements for receiving visible light reflected by the specific object; the visible light is used for obtaining two-dimensional image information of an object; and
at least one second light sensing element for receiving the invisible light reflected or emitted by the specific object and not receiving the visible light reflected by the specific object;
the identification of a true object and a false object is carried out by obtaining the intensity of invisible light; each first light sensing component comprises:
a first substrate;
a first light sensing region formed in the first substrate;
the first color filter is arranged on the first substrate and covers the first light sensing area; and
a first lens arranged on the first color filter;
each second light sensing component comprises:
a second substrate;
a second light sensing region formed in the second substrate;
the second color filter is arranged on the second substrate and covers the second light sensing area; and
a second lens arranged on the second color filter;
the first light sensing elements are arranged in a matrix, and meshes of the first light sensing elements are more than those of the second light sensing elements;
the under-screen optical fingerprint device is used for a display screen assembly and comprises a display panel and a protective cover plate, wherein the visible light is emitted by the display panel through driving, and the invisible light is emitted by an invisible light emitter arranged on one side of the display panel; the display panel is positioned between the optical input device and the protective cover plate.
2. An under-screen optical fingerprint device as recited in claim 1, wherein:
the second lens comprises an optical coating for filtering visible light and passing invisible light.
3. An under-screen optical fingerprint device as recited in claim 1, wherein:
the first color filter is used for allowing light in a specific visible light wavelength range to pass through and filtering light in an unspecified visible light wavelength range; and
the second color filter filters out visible light and allows invisible light to pass through.
4. An under-screen optical fingerprint device as recited in claim 1, wherein:
the first light sensing area is formed by doping a material sensitive to visible light on the first substrate; and
the second light sensing area is formed by doping a material sensitive to invisible light on the second substrate.
5. The under-screen optical fingerprint device of any one of claims 1-4, wherein the invisible light is infrared light.
6. The under-screen optical fingerprint device of claim 5, wherein the invisible infrared light is near infrared light.
7. The underscreen optical fingerprint device of any one of claims 1-4, wherein the display panel has a first side and a second side opposite the first side, the protective cover plate is disposed on the second side of the display panel, and the optical input device is disposed on the first side of the display panel with the display panel between the optical input device and the protective cover plate.
8. The underscreen optical fingerprint device of any one of claim 7, wherein the invisible light emitter is disposed on a first side of the display panel.
9. The under-screen optical fingerprint device of claim 8, wherein the invisible light emitter phase is the optical input device.
10. The under-screen optical fingerprint device of claim 7, wherein the invisible light emitter is disposed between the display panel and the protective cover.
11. A handheld device with a light fingerprint anti-counterfeiting sensing function for sensing a fingerprint of a specific object, the handheld device comprising:
the display screen assembly comprises a display panel and a protective cover plate, wherein the display panel is provided with a first side and a second side opposite to the first side, and the protective cover plate is arranged on the second side of the display panel; and
an optical input device, comprising:
the first light sensing elements are arranged on the first side of the display panel and used for receiving visible light reflected by the specific object; the visible light is used for obtaining two-dimensional image information of an object; and
at least one second light sensing element for receiving the invisible light reflected or emitted by the specific object and not receiving the visible light reflected by the specific object;
the identification of a true object and a false object is carried out by obtaining the intensity of invisible light;
each first light sensing component comprises:
a first substrate;
a first light sensing region formed in the first substrate;
the first color filter is arranged on the first substrate and covers the first light sensing area; and
a first lens arranged on the first color filter;
each second light sensing component comprises:
a second substrate;
a second light sensing region formed in the second substrate;
the second color filter is arranged on the second substrate and covers the second light sensing area; and
a second lens arranged on the second color filter;
the first light sensing elements are arranged in a matrix, and meshes of the first light sensing elements are more than those of the second light sensing elements;
wherein the visible light is emitted by the display panel by driving, and the invisible light is emitted by an invisible light emitter provided at the first side or the second side of the display panel.
12. The hand-held device of claim 11, wherein:
the second lens comprises an optical coating for filtering visible light and passing invisible light.
13. The hand-held device of claim 11, wherein:
the first color filter is used for allowing light in a specific visible light wavelength range to pass through and filtering light in an unspecified visible light wavelength range; and
the second color filter filters out visible light and allows invisible light to pass through.
14. The hand-held device of claim 11, wherein:
the first light sensing area is formed by doping a material sensitive to visible light on the first substrate; and
the second light sensing area is formed by doping a material sensitive to invisible light on the second substrate.
15. The hand-held device of any one of claims 11 to 14, wherein the invisible light is infrared light.
16. The handheld device of claim 15, wherein the invisible infrared light is near infrared light.
17. The hand-held device of any one of claims 11 to 14, wherein the invisible light emitter is disposed on a first side of the display panel.
18. The handheld device of claim 17, wherein the invisible light emitter phase is the optical input device.
19. The hand-held device of any one of claims 11 to 14, wherein the invisible light emitter is disposed between the display panel and the protective cover.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/112539 WO2020087242A1 (en) | 2018-10-30 | 2018-10-30 | In-display optical fingerprint device and handheld device having optical fingerprint anti-counterfeiting sensing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109564627A CN109564627A (en) | 2019-04-02 |
| CN109564627B true CN109564627B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880002092.3A Active CN109564627B (en) | 2018-10-30 | 2018-10-30 | Under-screen optical fingerprint device with optical fingerprint anti-counterfeiting sensing function and handheld device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109564627B (en) |
| WO (1) | WO2020087242A1 (en) |
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| CN112131906A (en) * | 2019-06-24 | 2020-12-25 | Oppo广东移动通信有限公司 | Optical fingerprint sensor and electronic equipment with same |
| EP3809315B1 (en) | 2019-08-23 | 2022-12-07 | Shenzhen Goodix Technology Co., Ltd. | Fingerprint detection method |
| CN111095285B (en) * | 2019-08-23 | 2021-09-17 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN111133445B (en) * | 2019-08-23 | 2021-09-24 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN211062054U (en) | 2019-08-30 | 2020-07-21 | 指纹卡有限公司 | Biometric imaging arrangement and electronic device |
| CN111095282B (en) | 2019-10-18 | 2023-09-05 | 深圳市汇顶科技股份有限公司 | Fingerprint detection device and electronic equipment |
| TWI785377B (en) * | 2020-01-02 | 2022-12-01 | 神盾股份有限公司 | Touch display device with fingerprint anti-spoofing function and associated fingerprint anti-spoofing method |
| CN114582904A (en) | 2021-05-18 | 2022-06-03 | 友达光电股份有限公司 | Dual sensing device |
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| WO2020087242A1 (en) | 2020-05-07 |
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