WO2020087242A1 - In-display optical fingerprint device and handheld device having optical fingerprint anti-counterfeiting sensing function - Google Patents

Abstract

An in-display optical fingerprint device and a handheld device (100) having an optical fingerprint anti-counterfeiting sensing function. The in-display optical fingerprint device is configured to sense the fingerprint of a specific object (50) and comprises an optical input device (20); the optical input device (20) comprises a plurality of first optical sensing elements (30) configured to receive visible light (L11) reflected by the specific object (50), and a plurality of second optical sensing elements (40) configured to receive invisible light (L12) reflected or emitted by the specific object (50) but not receive the visible light (L11) reflected by the specific object (50). Therefore, the intensity of the invisible light (L12) obtained by the optical input device (20) by means of the second optical sensing elements (40) is used as a basis for excluding full-screen mobile phone operation performed by a fake finger using a correct fingerprint, thereby effectively improving the optical fingerprint anti-counterfeiting function.

Description

Under-screen optical fingerprint device and handheld device with optical fingerprint anti-counterfeiting sensing function Technical field

The invention relates to an optical fingerprint device, in particular to an under-screen optical fingerprint device with an optical fingerprint anti-counterfeit sensing function.

Background technique

In the past, fingerprint capture was mostly based on capacitive sensing fingerprints. In recent years, full-screen mobile phones have become a trend. Among them, under-screen fingerprints are one of the current mainstream methods.

In the past, the anti-counterfeiting of non-biological fake fingerprints can be designed by capacitive circuit sensing to distinguish between real fingers and sampled fake fingers. However, currently full-screen mobile phones that use optical under-screen fingerprint sensing technology use optical reflection to capture fingerprint images for fingerprints. Identification of features, so it is impossible to distinguish real fingers and sample fake fingers through electrical characteristics.

In this way, when the interested person obtains the fingerprint of the legal user and makes a fake finger, the fake finger can be used to identify the full-screen mobile phone fingerprint of the legal user, thereby stealing the full-screen mobile phone.

Therefore, the anti-counterfeiting mechanism on the optical fingerprint of the full-screen mobile phone that currently uses the optical under-screen fingerprint sensing technology needs further improvement and innovation.

Summary of the invention

One of the objects of the present invention is to disclose an under-screen optical fingerprint device and a handheld device with an optical fingerprint anti-counterfeiting sensing function to solve the above problems.

An embodiment of the present application discloses an under-screen optical fingerprint device with an optical fingerprint anti-counterfeit sensing function. The under-screen optical fingerprint device includes an optical input device; wherein the optical input device includes: a plurality of first light sensing elements for receiving visible light reflected by the specific object; and at least one second light sensing The element is used for receiving invisible light reflected or emitted by the specific object, and not receiving visible light reflected by the specific object.

The under-screen optical fingerprint device disclosed in this application obtains the optical image of the fingerprint of the finger outside the display screen through the first light-sensing component in the optical input device, and further obtains the comparison of the human finger through the second light-sensing component. A large amount of reflected invisible light can be used to distinguish true and false fingers.

Another embodiment of the present application discloses a handheld device with an optical fingerprint anti-counterfeit sensing function. The handheld device includes: a display screen assembly including a display panel and a protective cover plate, the display panel having a first side and a second side opposite to the first side, the protective cover plate is provided On the second side of the display panel; and an optical input device, including: a plurality of first light sensing elements, disposed on the first side of the display panel, for receiving visible light reflected by the specific object; And at least one second light-sensing element for receiving invisible light reflected or emitted by the specific object, and not receiving visible light reflected by the specific object.

The handheld device disclosed in this application obtains an optical fingerprint image through the first light-sensing component, and cooperates with the second light-sensing component to additionally obtain invisible light reflected by a large amount of human fingers as a basis for eliminating fake fingers To enhance the fingerprint anti-counterfeiting capability of handheld devices.

BRIEF DESCRIPTION

FIG. 1A is a schematic view of the appearance of a handheld device with anti-counterfeit sensing function of an optical fingerprint of the present application.

FIG. 1B is a schematic structural diagram of the display screen of FIG. 1A.

2 is a top view of an embodiment of the optical input device of the display screen of the present application.

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2.

FIG. 4 is another schematic cross-sectional view taken along line A-A of FIG. 2.

FIG. 5 is another schematic cross-sectional view of the A-A cutting plane line of FIG. 2.

FIG. 6 is another schematic cross-sectional view of the A-A cut line of FIG. 2.

7 is a schematic structural view of a second embodiment of a display screen with optical fingerprint anti-counterfeiting sensing function of the present application.

8 is a schematic structural diagram of a third embodiment of a display screen with optical fingerprint anti-counterfeiting sensing function of the present application.

Among them, the reference signs are described as follows:

1

10 The display assembly of the display panel

100 Hand-held device, hand-held device

11 The display panel of the display panel

11a

11b The first side of the first side

12 Protective cover plate

20, 20a, 20b, 20c Optical input device

30 The first light sensing module

31 The first base material of the first base material

311 The first light sensing area

32 First Color Filter First, the first color filter

33. The first lens. The first lens.

40, 40a, 40b, 40c Second light sensing component

41 The second base material is the second base material

411, 411a, the second light sensing area

42、42a Second color filter

43, 43a Second lens Second lens

431 Optical coatings for optical coatings

L1 Lightning Light

L11 Visible light in the light of L11

L12, L12 ’, invisible light

50、51 Targets of the target

60. Invisible light emitters, invisible light emitters

detailed description

In the description and the preceding claims, certain words are used to refer to specific components. Those skilled in the art should understand that manufacturers may use different terms to refer to the same component. This specification and the preceding claims do not use differences in names as a means of distinguishing components, but differences in functions of components as a basis for distinguishing. The "including" mentioned in the preceding claims and the preceding claims is an open term, so it should be interpreted as "including but not limited to".

The display screen with optical fingerprint anti-counterfeiting sensing function of the present application can obtain invisible light reflected or emitted by real human (living) fingers to realize the distinction between real and fake fingers, and effectively improve the security of fingerprint anti-counterfeiting under the optical screen The technical content of the display screen of the present application will be described in detail in conjunction with multiple embodiments and drawings.

Referring first to FIGS. 1A and 1B, the handheld device 100 of the present application is used to sense the fingerprints of a specific object 50, 51 and includes a display screen 1. The first embodiment of the display screen includes a display screen assembly 10 和 光学 input 装置 20。 10 and optical input device 20. 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 screen assembly 10 includes at least a display panel 11 and a protective cover 12; wherein the display panel 11 has a first side and a second side 11a opposite to the first side 11b, the protective cover 12 is disposed in The second side 11a of the display panel 11. The display panel 11 emits a variety of visible light L1 in different wavelength ranges by driving to display color images. In this embodiment, the display panel 11 may be an organic electroluminescence display panel (OLED), but it is not limited thereto.

The optical input device 20 is provided on the first side 11b of the display panel 11 of the display screen 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 components 30 and at least one second light-sensing component 40; as shown in FIG. 2 again, the plurality of first light-sensing components 30 and the second light-sensing component 40 may be It is arranged in a matrix. Please note that the present invention does not limit the number of the first light sensing element 30 and the second light sensing element 40 included in the optical input device 20, but the number of the plurality of first light sensing elements is more than The at least one second light-sensing element is actually not limited to the arrangement of the second light-sensing components 40 of the optical input device 20, and may include any number of pixels 14 arranged in any manner. Preferably, the second light-sensing components 40 are uniformly arranged in the first light-sensing component 30 in a relatively dense manner, for example, n * n first light-sensing components 30 are provided with a second light The sensing component 40, where n * n may be 4 * 4, 8 * 8, 16 * 16, etc., can be adjusted according to different applications.

When a specific object 50, 51 is close to the protective cover 12 of the display assembly 10, the object 50, 51 reflects part of the visible light L11 emitted by the display panel 11. If the specific object 50 is a part of the human body, such as a finger, it will simultaneously reflect invisible light L12; conversely, if the specific object 51 is not a part of the human body, for example, the specific object 51 is a fake finger, it will absorb most of the invisible light L12, Instead, it reflects only visible light L11 and a relatively small amount of invisible light L12 'relative to the specific object 50. In other words, the intensity of invisible light L12' may be zero, approach zero, or much smaller than invisible light L12, therefore, By determining the intensity of the invisible light reflected by the object 50 and the object 51, it can be distinguished whether the object 50 and the object 51 are real human bodies.

The first light sensing component 30 of the optical input device 20 is used to receive the visible light L11 reflected by the objects 50 and 51 located outside the protective cover 12 and obtain the two-dimensional image information of the objects 50 and 51. The two-dimensional image information mentioned here is a two-dimensional fingerprint image; therefore, fingerprint characteristics can be identified based on the two-dimensional fingerprint image.

The second light-sensing component 40 of the optical input device 20 is used to receive the invisible light L12 and L12 'reflected by the objects 50 and 51 located outside the protective cover plate 12, and perform true and false by obtaining the intensity of the invisible light Identification of objects 50, 51. The real object 50 here refers to a part of the human body, such as a finger; conversely, the fake object 51 is not a part of the human body. Therefore, the true and false fingerprints can be identified based on the strength of the invisible light. Preferably, the invisible light L2 here refers to invisible infrared light, especially near infrared light (light wavelength range 800-2500 nm).

Please refer to FIG. 3, the optical input device 20 in FIG. 3 is a schematic cross-sectional view of an embodiment of the above optical input device. As can be seen from the figure, each first light sensing element 30 includes a first substrate 31, a A light-sensing area 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 area 411, and a second color filter 42 And the second lens 43a. In this embodiment, the first substrate 31 and the second substrate 41 are the same, the first light-sensing area 311 and the second light-sensing area 411 are the same, and the first color filter 32 and the second color filter 42 are the same Only the first lens 33 and the second lens 43a are different.

Please also refer to FIG. 1 and FIG. 3, in this embodiment, the first light-sensing area 311 and the second light-sensing area 411 are doped with the same photosensitive material on the first substrate 31 and the second substrate 41 Medium; 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 area 311 and the second light-sensing area 411, respectively ; The first lens 33 is disposed on the first color filter 32, and allows the visible light L11 from the first lens 33 through the first lens 33 into the first color filter 32, the visible light L11 then passes through the first color filter The sheet 32 is also received by the first light-sensing area 311. The optical image of the object 50 or the object 51 can be obtained through the first light sensing component 30. The second lens 43a is disposed on the second color filter 42. The second lens 43a has an optical coating 431 covering the outer side of the second lens 43a. The optical coating 431 can filter out visible light L11 and enter the second lens 43a In other words, the second lens 43a only passes the invisible light L12, L12 '. Therefore, by the strength of the invisible light L12, L12 'received by the second light-sensing component 40, it can be determined whether the objects 50, 51 outside the display 1 are real fingers.

Please refer 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. As can be seen from the figure, each first light sensing element 30 includes a first substrate 31. A first light-sensing area 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 area 411, and a second color filter Optical sheet 42a and second lens 43. In this embodiment, the first substrate 31 and the second substrate 41 of the second light-sensing element 40a are substrates sharing the same material. The first substrate 31 and the second substrate 41 are the same, and the first light-sensing area 311 and the second light-sensing area 411 are the same, the first lens 33 and the second lens 43 are the same, only the first color filter 32 and the second color filter 42a are different.

Please refer to FIGS. 1 and 4 at the same time. In this embodiment, the first light-sensing area 311 and the second light-sensing area 411 are respectively doped in the first substrate 31 and the second substrate 41 with the same photosensitive material; 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 area 311 and the second light-sensing area 411, respectively; The first color filter 32 allows visible light L11 in a specific wavelength range to pass, while the second color filter 42a only passes invisible light L12, L12 'in the invisible light wavelength range, and filters out visible light L11. Therefore, by the strength of the invisible light L12, L12 'received by the second light-sensing component 40, it can be determined whether the objects 50, 51 outside the display 1 are real fingers.

Referring again to FIG. 5, the optical input device 20b in FIG. 5 is a schematic cross-sectional view of yet another embodiment of the optical input device 20 described above. As can be seen from the figure, each first light sensing element 30 also includes a first The substrate 31, the first light-sensing area 311, the first color filter 32 and the first lens 33, and each second light-sensing element 40b also includes a second substrate 41, a second light-sensing area 411a, The second color filter 42 and the second lens 43. In this 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, only the first One light sensing area 311 is different from the second light sensing area 411a.

Please refer to FIGS. 1 and 5 at the same time. In this embodiment, the first photosensitive region 311 and the second photosensitive region 411a are doped with different photosensitive materials in the first substrate 31 and the second substrate 41, respectively; The first light-sensing area 311 is doped in the substrate with a material sensitive to visible light, and the second light-sensing area 411a is doped in the substrate with a material sensitive to invisible light, equivalent to (For example) infrared diode. In this 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' will be received by the second light sensing area 411a, so The strength of the invisible light L12, L12 'received by the light sensing component 40b can determine whether the objects 50, 51 outside the display screen 1 are real fingers.

Please refer to FIGS. 1 and 6 at the same time. The optical input device 20c in FIG. 6 is a schematic cross-sectional view of yet another embodiment of the optical input device 20 described above. It can be seen from the figure that in this embodiment, the optical input device 20c The second light-sensing component 40c is an embodiment combined with FIGS. 3, 4 and 5, specifically, the second light-sensing component 40c includes the second lens 43a of FIG. 3 and the second color filter of FIG. 42a and the second light-sensing area 411a of FIG. 5 can also 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 the human body. In addition, the second light sensing element 40c of the optical input device 20 of the present invention may also combine the second lens 43a and the second color filter 42a of FIG. 3 and FIG. 4, or the first embodiment of the embodiment of FIG. 4 and FIG. The two color filters 42a and the second light-sensing area 411a, or the second lens 43a and the second light-sensing area 411a in combination with the embodiments of FIGS. 3 and 5 can achieve the same effect.

As described above, the optical input device of the present application can determine whether the objects 50 and 51 are part of the human body through the intensity of the invisible light reflected or emitted by the objects 50 and 51. As shown in FIG. 7, the display screen assembly 10 of the present application may further include an invisible light emitter 60. The invisible light emitter 60 may be disposed between the protective cover 12 and the display panel 11, however, the disclosure is not limited to this In some embodiments, as shown in FIG. 8, the invisible light emitter 60 may be disposed beside the optical input device 20, that is, the inner side 11b of the display panel 11.

In summary, in a display screen with anti-counterfeit sensing function of optical fingerprint disclosed in the present application, when performing fingerprint recognition of a human finger, the fingerprint of the finger outside the display screen is obtained through the first light sensing component in the optical input device The optical image, and then the second light sensing component further obtains a large amount of invisible light reflected by the human finger to exclude the use of non-human fingers with correct fingerprint images, adding a second protection mechanism, this application does indeed Compensate for the defect that the display using optical under-screen fingerprint sensing technology cannot distinguish between real and fake fingers.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (25)

An under-screen optical fingerprint device with optical fingerprint anti-counterfeiting sensing function for sensing a fingerprint of a specific object, characterized in that the under-screen optical fingerprint device includes: An optical input device, including: A plurality of first light sensing elements for receiving visible light reflected by the specific object; and At least one second light sensing element is used to receive the invisible light reflected or emitted by the specific object, and does not receive the visible light reflected by the specific object. The under-screen optical fingerprint device of claim 1, wherein each first light-sensing component comprises: A first substrate; A first light-sensing area formed in the first substrate; A first color filter disposed on the first substrate and covering the first light-sensing area; and A first lens is arranged on the first color filter. The under-screen optical fingerprint device according to claim 2, wherein each second light-sensing component comprises: A second substrate; A second light sensing area formed in the second substrate; A second color filter disposed on the second substrate and covering the second light-sensing area; and A second lens is disposed on the second color filter. The under-screen optical fingerprint device according to claim 3, wherein: The second lens includes an optical coating to filter out visible light and pass invisible light. The under-screen optical fingerprint device according to claim 3, wherein: The first color filter passes light in a specific visible light wavelength range, and filters light in a specific visible light wavelength range; and The second color filter filters out visible light and passes invisible light. The under-screen optical fingerprint device according to claim 3, wherein: The first light-sensing area is doped with a material sensitive to visible light on the first substrate; and The second light sensing area is doped with a material sensitive to invisible light on the second substrate. The under-screen optical fingerprint device according to any one of claims 1 to 6, wherein the invisible light is infrared light. The under-screen optical fingerprint device according to claim 7, wherein the invisible infrared light is near-infrared light. The under-screen optical fingerprint device according to any one of claims 1 to 6, the under-screen optical fingerprint device is used for a display screen assembly, including a display panel and a protective cover, the display panel having a first One side and a second side relative to the first side, the protective cover plate is disposed on the second side of the display panel, characterized in that the optical input device is disposed on the first side of the display panel Side, position the display panel between the optical input device and the protective cover. The under-screen optical fingerprint device according to any one of claims 1 to 6, further comprising an invisible light emitter for emitting invisible light to the specific object, the invisible light emitter is provided at The first side of the display panel. The under-screen optical fingerprint device of claim 10, wherein the invisible light emitter is adjacent to the optical input device. The under-screen optical fingerprint device according to claim 9, further comprising an invisible light emitter for emitting invisible light to the specific object, the invisible light emitter is provided on the display panel Between the protective covers. The under-screen optical fingerprint device according to any one of claims 1 to 6, wherein the plurality of first light sensing elements and the at least one second light sensing element are arranged in a matrix, and the The number of the plurality of first light sensing elements is more than the at least one second light sensing element. A hand-held device with optical fingerprint anti-counterfeit sensing function for sensing a fingerprint of a specific object, characterized in that the hand-held device includes: A display screen assembly includes a display panel and a protective cover plate, the display panel has a first side and a second side opposite to the first side, the protective cover plate is disposed on the display panel The second side; and An optical input device, including: A plurality of first light-sensing elements, disposed on the first side of the display panel, for receiving visible light reflected by the specific object; and At least one second light sensing element is used to receive the invisible light reflected or emitted by the specific object, and does not receive the visible light reflected by the specific object. The handheld device of claim 14, wherein each first light sensing component comprises: A first substrate; A first light-sensing area formed in the first substrate; A first color filter disposed on the first substrate and covering the first light-sensing area; and A first lens is arranged on the first color filter. The handheld device according to claim 15, wherein each second light sensing component comprises: A second substrate; A second light sensing area formed in the second substrate; A second color filter disposed on the second substrate and covering the second light-sensing area; and A second lens is disposed on the second color filter. The handheld device according to claim 16, wherein: The second lens includes an optical coating to filter out visible light and pass invisible light. The handheld device according to claim 16, wherein: The first color filter passes light in a specific visible light wavelength range, and filters light in a specific visible light wavelength range; and The second color filter filters out visible light and passes invisible light. The handheld device according to claim 16, wherein: The first light-sensing area is doped with a material sensitive to visible light on the first substrate; and The second light sensing area is doped with a material sensitive to invisible light on the second substrate. The handheld device according to any one of claims 14 to 19, wherein the invisible light is infrared light. The handheld device of claim 20, wherein the invisible infrared light is near infrared light. The handheld device according to any one of claims 14 to 19, further comprising an invisible light emitter for emitting invisible light to the specific object, the invisible light emitter is disposed on the display The first side of the panel. The handheld device of claim 22, wherein the invisible light emitter is adjacent to the optical input device. The handheld device according to any one of claims 14 to 19, further comprising an invisible light emitter for emitting invisible light to the specific object, the invisible light emitter is disposed on the display Between the panel and the protective cover. The handheld device according to any one of claims 14 to 19, wherein the plurality of first light sensing elements and the at least one second light sensing element are arranged in a matrix, and the plurality of The number of the first light sensing elements is more than the at least one second light sensing element.

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