Protective film, electronic equipment and fingerprint testing device

Abstract

The utility model provides a protective film, electronic equipment and a fingerprint testing device, and belongs to the technical field of electronics. The protective film comprises a fool-proof area, and a feature structure is arranged in the fool-proof area and used for preventing a detection signal of the fingerprint module from penetrating through the protective film. According to the protective film disclosed by the utility model, the fool-proof area in the protective film can be utilized to cover the fingerprint identification area of the electronic equipment, and the characteristic structure in the fool-proof area can prevent a detection signal of a fingerprint module from penetrating through the protective film, so that the fingerprint module cannot be calibrated or tested under the condition that the protective film is not uncovered, and the safety of the electronic equipment is ensured. And the problem of missing detection of the fingerprint module of the electronic equipment is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic technical field, especially relate to a protective film, electronic device and fingerprint testing device. BACKGROUND

[0002] Fingerprint identification is the technology that utilizes ultrasonic wave, light ray to scan fingerprint to complete fingerprint identification, and the fingerprint identification module is widely applied in electronic device such as mobile phone.

[0003] In the related art, during the production and assembly of the electronic device, the protective film needs to be pasted on the surface of the electronic device after complete assembly, and the protective film is torn off when the fingerprint identification module is calibrated or tested. However, in actual production, the problem of not tearing off the protective film and calibrating or testing the fingerprint identification module through the protective film often occurs, which will cause the calibration or test result to be distorted. SUMMARY

[0004] The utility model provides a kind of protective film, electronic device and fingerprint testing device, can solve the problem of not tearing off the protective film in actual production, calibrating or testing the fingerprint identification module, resulting in the problem of distorted calibration or test result.

[0005] The technical solution is as follows:

[0006] On the one hand, a protective film is provided, which includes a foolproof area.

[0007] The foolproof area is provided with a feature structure, which is used to prevent the detection signal of the fingerprint module from penetrating the protective film.

[0008] In some embodiments, when the detection signal is ultrasonic wave, the feature structure is filled with air, and the feature structure prevents ultrasonic wave from penetrating the protective film by using the internal air.

[0009] In some embodiments, the feature structure includes at least one hole and groove part, and the feature structure is located on the side of the protective film facing the electronic device.

[0010] In some embodiments, the number of hole and groove parts is multiple, and multiple hole and groove parts are arrayed in the foolproof area.

[0011] In some embodiments, the at least one hole and groove part penetrates to the side of the protective film away from the electronic device.

[0012] In some embodiments, the protective film includes at least two film layers arranged in layers, wherein the area outside the foolproof area between the adjacent two film layers is filled with adhesive material, the area inside the foolproof area has an air layer, and the air layer forms the feature structure.

[0013] In another aspect, an electronic device is provided, the electronic device comprising a fingerprint recognition area;

[0014] When the protective film is attached to the surface of the electronic device, the foolproof area covers the fingerprint recognition area of the electronic device.

[0015] In some embodiments, the electronic device further comprises a display screen, the fingerprint recognition area is located on the display screen, and the protective film is attached to the display screen.

[0016] In another aspect, a fingerprint testing device is provided, the fingerprint testing device being used for collating or testing a fingerprint module of an electronic device; an outer surface of the electronic device is attached with the protective film according to the present application;

[0017] The fingerprint testing device comprises a testing platform and a testing head;

[0018] The testing head is movably arranged on one side of the testing platform, and the electronic device is placed on the testing platform; the testing head has a first position for pressing contact with the fingerprint recognition area of the electronic device, and a surface of the testing head in contact with the electronic device is provided with a simulated fingerprint structure;

[0019] The fingerprint module is used for collecting a test image of the simulated fingerprint structure when the testing head is in pressing contact with the fingerprint recognition area.

[0020] In some embodiments, the fingerprint testing device further comprises an image comparison unit and a control unit, and the image comparison unit is electrically connected with the fingerprint module and the control unit respectively;

[0021] The image comparison unit is used for comparing the test image with an original image of the simulated fingerprint structure, and the control unit is used for determining that the protective film is not torn when there is a difference between the test image and the original image.

[0022] In some embodiments, the fingerprint testing device further comprises an alarm unit, and the alarm unit is electrically connected with the control unit;

[0023] The alarm unit is used for outputting an alarm signal when it is determined that the protective film is not torn.

[0024] The technical scheme provided by the present application has at least the following beneficial effects:

[0025] The protective film is suitable for pasting and protecting the outer surface of the electronic device, the characteristic structure in the foolproof area can prevent the detection signal of the fingerprint module from penetrating the protective film, so that the fingerprint module cannot be calibrated or tested without the protective film being opened, and thus the problem of missed detection of the fingerprint module of the electronic device is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0027] Figure 1 is a pasting state schematic diagram of the protective film and the electronic device provided by the embodiment of the present application;

[0028] Figure 2 is a separation state schematic diagram of the protective film and the electronic device provided by the embodiment of the present application;

[0029] Figure 3 is a structure sectional view of the protective film provided by the embodiment of the present application;

[0030] Figure 4 is a structure sectional view of the protective film provided by another embodiment of the present application;

[0031] Figure 5 is a structure schematic diagram of the fingerprint testing device provided by the embodiment of the present application;

[0032] Figure 6 is a structure schematic diagram of the fingerprint testing device provided by the embodiment of the present application;

[0033] Figure 7 is a connection schematic diagram of the fingerprint testing device provided by the embodiment of the present application.

[0034] The reference signs in the drawings are respectively represented as:

[0035] 1, protective film;

[0036] 101, foolproof area;

[0037] 11, characteristic structure; 111, hole groove part; 12, film layer; 13, adhesive material; 14, air interlayer;

[0038] 2, electronic device;

[0039] 201, fingerprint identification area;

[0040] 21, fingerprint module; 22, display screen;

[0041] 3, test platform;

[0042] 4, test indenter;

[0043] 41, pseudo-fingerprint structure;

[0044] 5, image comparison unit;

[0045] 6, control unit;

[0046] 7, alarm unit. DETAILED DESCRIPTION

[0047] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers are used to indicate the same or similar elements, unless otherwise represented. The embodiments described in the following exemplary embodiments are not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. Figure 1

[0049] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by those of ordinary skill in the art.

[0050] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0051] On the one hand, in combination with Figure 1 and Figure 2 As shown in the drawings, the present embodiment provides a protective film 1, the protective film 1 includes a foolproof area 101, the feature structure 11 is arranged in the foolproof area 101, the feature structure 11 is used to prevent the detection signal of the fingerprint module 21 from penetrating the protective film 1.

[0052] ​The protective film 1 of the present embodiment is suitable for being attached to and protecting the outer surface of the electronic device 2. The foolproof area 101 in the protective film 1 covers the fingerprint recognition area 201 of the electronic device 2, and the feature structure 11 in the foolproof area 101 can prevent the ultrasonic waves of the fingerprint module 21 from penetrating the protective film 1, so that the fingerprint module 21 cannot be calibrated or tested without removing the protective film 1, thereby avoiding the problem of missed detection of the fingerprint module 21 of the electronic device 2.

[0053] In some possible implementations, the fingerprint module 21 can be an optical fingerprint module, an ultrasonic fingerprint module, or the like. When the fingerprint module 21 is an optical fingerprint module, the detection signal is light, and the feature structure 11 is used to block the light from penetrating; when the fingerprint module 21 is an ultrasonic fingerprint module, the detection signal is ultrasonic wave, and the feature structure 11 is used to block the ultrasonic wave from penetrating.

[0054] In combination with FIGS. 1A and 1B, Figure 1 and Figure 2 As shown in FIGS. 1A and 1B, in some embodiments, when the protective film 1 is attached to the surface of the electronic device 2, the foolproof area 101 covers the fingerprint recognition area 201 of the electronic device 2.

[0055] The scheme of the present embodiment is suitable for various electronic devices. Specifically, the electronic device can be any of various types of computer system devices that are mobile or portable and have fingerprint recognition. Specifically, the electronic device can be a mobile phone or a smart phone (e.g., an iPhone TM-based phone, an Android TM-based phone), a portable game device (e.g., Nintendo DS TM, PlayStation Portable TM, Gameboy Advance TM, iPhone TM), a laptop computer, a PDA, a portable Internet device, a music player, and a data storage device, other handheld devices, and the like such as a headset, and the electronic device can also be other wearable devices that need to be charged (e.g., a head-mounted device (HMD) such as an electronic bracelet, an electronic necklace, an electronic device, or a smart watch).

[0056] The electronic device can also be any of a plurality of electronic devices including but not limited to a cellular phone, a smart phone, other wireless communication device, a personal digital assistant, an audio player, other media player, a music recorder, a video recorder, other media recorder, a radio, a medical device, a vehicle transportation instrument, a calculator, a programmable remote controller, a pager, a laptop computer, a desktop computer, a printer, a netbook, a personal digital assistant (PDA), a portable multimedia player (PMP), a motion picture experts group (MPEG-1 or MPEG-2) audio layer 3 (MP3) player, a portable medical device, and a digital camera, and a combination thereof, and the like.

[0057] In some cases, the electronic device can perform multiple functions (e.g., play music, display videos, store pictures, and receive and send telephone calls). If desired, the electronic device can be a cellular telephone, a media player, other handheld device, wristwatch device, pendant device, earpiece device, or other compact, portable device.

[0058] In combination Figure 2 As shown, in some embodiments, when the fingerprint module 21 is an ultrasonic fingerprint module, the detection signal is an ultrasonic wave, and the feature structure 11 is filled with air, the feature structure 11 can use the internal air to prevent the ultrasonic wave from penetrating the protective film 1.

[0059] The ultrasonic fingerprint unlocking technology emits ultrasonic waves to the surface of the finger through a sensor, and receives the echoes reflected by the surface of the finger. Due to the density difference between the skin of the fingerprint surface and the air, these echoes will form different signals, thereby constructing a 3D image of the finger. This 3D image is then compared with the fingerprint information stored on the device to achieve accurate fingerprint recognition.

[0060] However, the wavelength of the ultrasonic wave is short, and it is easily lost due to scattering in the air. Therefore, the embodiment uses air as a blocking medium for the ultrasonic wave, which has the advantages of low cost, easy availability, and no pollution.

[0061] In combination Figure 3 As shown, in some embodiments, the feature structure 11 includes at least one hole slot part 111, and the feature structure 11 is located on the side of the protective film 1 facing the electronic device 2.

[0062] Through the above arrangement, at least one hole slot part 111 is provided on the protective film 1 of the fool-proof area 101, and air can naturally enter the hole slot part 111 to block the ultrasonic wave. The structure is simple and convenient to process.

[0063] For example, the number of hole slot parts 111 is one, two, three, etc.

[0064] In combination Figure 3 As shown, in some embodiments, the number of hole slot parts 111 is multiple, and the multiple hole slot parts 111 are arrayed in the fool-proof area 101.

[0065] Through the above arrangement, the multiple hole slot parts 111 arrayed in the fool-proof area 101 can form an arrayed air blocking wall. Compared with a single hole slot part 111, the multiple hole slot parts 111 arrayed have a higher ultrasonic wave blocking effect, which is beneficial to improve the working reliability of the protective film 1.

[0066] In combination Figure 3As shown, in some embodiments, at least one hole groove part 111 penetrates to the side of the protective film 1 away from the electronic device 2.

[0067] In this embodiment, the hole groove part 111 is arranged in a penetrating manner, which can accommodate more air and has better ultrasonic wave blocking effect.

[0068] In combination Figure 3 As shown, in some embodiments, the protective film 1 includes at least two film layers 12 arranged in a stack, wherein the area outside the foolproof area 101 between the adjacent two film layers 12 is filled with adhesive material 13, and the area inside the foolproof area 101 has an air layer 14 formed as a feature structure 11.

[0069] Through the above arrangement, the protective film 1 is designed as at least two film layers 12 arranged in a stack, by not filling the adhesive material 13 in the foolproof area 101, when the at least two film layers 12 are stacked, the gap between the adjacent film layers 12 in the area outside the foolproof area 101 is filled with the adhesive material 13, and the air is squeezed out, while in the foolproof area 101, there is no adhesive material 13, and an air layer 14 is retained between the adjacent film layers 12, and the air layer 14 is sealed by the surrounding adhesive material 13, and the air layer 14 is used to form the above-mentioned feature structure 11, which is simple in structure, convenient in production and processing, and the air layer 14 can cover the entire range of the foolproof area 101, so that the foolproof area 101 has better ultrasonic wave blocking effect.

[0070] In combination Figure 1 As shown, in some embodiments, the electronic device 2 includes a display screen 22, the fingerprint recognition area 201 is located on the display screen 22 of the electronic device 2, and the protective film 1 is attached to the display screen 22.

[0071] Through the above arrangement, the protective film 1 is attached to the display screen 22, which is used to cover and protect the display screen 22 of the electronic device 2, the fingerprint recognition module is located at the bottom of the display screen 22 and forms a fingerprint recognition area 201 on the display screen 22, which is used to realize fingerprint recognition without attaching the protective film 1, and when the protective film 1 is attached, due to the existence of the foolproof area 101, when the fingerprint is pressed on the fingerprint recognition area 201, the ultrasonic wave cannot pass through due to the blockage of the feature structure 11, thereby hindering the ultrasonic fingerprint recognition.

[0072] On the other hand, in combination Figure 1 And Figure 2 As shown, the present embodiment provides an electronic device, which includes a fingerprint recognition area 201; when the protective film 1 of the present application is attached to the surface of the electronic device 2, the foolproof area 101 covers the fingerprint recognition area 201 of the electronic device 2.

[0073] The electronic device of the embodiment can be pasted with the protective film 1 of the utility model, the foolproof area 101 in the protective film 1 covers the fingerprint identification area 201 of the electronic device 2, and the characteristic structure 11 in the foolproof area 101 can prevent the ultrasonic wave of the fingerprint module 21 from penetrating the protective film 1, so that it can be ensured that the fingerprint module 21 cannot be calibrated or tested without the protective film 1 being opened, thereby avoiding the problem of missed detection of the fingerprint module 21 of the electronic device 2.

[0074] In combination with Figure 1 and Figure 2 shown, in some embodiments, the electronic device 2 further includes a display screen 22, the fingerprint identification area 201 is located on the display screen 22, and the protective film 1 is pasted on the display screen 22.

[0075] Through the above arrangement, for the electronic device 2 with the display screen 22, the protective film 1 can be directly pasted on the display screen 22, and the protective film 1 can be positioned according to the display screen 22, so that the foolproof area 101 of the protective film 1 covers the fingerprint identification area 201 of the display screen 22.

[0076] Exemplarily, the shape of the protective film 1 is the same as that of the display screen 22.

[0077] On the other hand, in combination with Figure 5 and Figure 6 shown, the embodiment provides a fingerprint testing device for calibrating or testing the fingerprint module 21 of the electronic device 2; the outer surface of the electronic device 2 is pasted with the protective film 1 of the utility model.

[0078] The fingerprint testing device includes a testing platform 3 and a testing pressure head 4; the testing pressure head 4 is movably arranged on one side of the testing platform 3, and the electronic device 2 is placed on the testing platform 3; the testing pressure head 4 has a first position in pressing contact with the fingerprint identification area 201, and the surface of the testing pressure head 4 in contact with the electronic device 2 is provided with a simulated fingerprint structure 41.

[0079] The fingerprint module 21 is used to collect a test image of the simulated fingerprint structure 41 when the testing pressure head 4 is in pressing contact with the fingerprint identification area 201.

[0080] The fingerprint testing device of the embodiment adopts the protective film 1 of the utility model and has all the beneficial technical effects of the utility model.

[0081] In some possible implementations, the fingerprint testing device is located at one side of an automatic production line of the electronic device 2. When the electronic device 2 to which the protective film 1 is attached moves to the testing platform 3, the testing head 4 moves to the first position. At this time, if the protective film 1 is not peeled off, the pseudo-fingerprint structure 41 is pressed against the fool-proof area 101 of the protective film 1 and cannot directly contact the fingerprint identification area 201, and the ultrasonic waves emitted by the fingerprint module 21 in the electronic device 2 cannot penetrate the feature structure 11 of the fool-proof area 101, so that the calibration or testing of the fingerprint module 21 cannot be normally performed. At this time, a prompt or a reminder to peel off the protective film 1 can be given, so as to prevent the missed detection or the wrong detection of the electronic device 2 in the online detection process.

[0082] In combination Figure 7 As shown in the figure, in some embodiments, the fingerprint testing device further includes an image comparison unit 5 and a control unit 6. The image comparison unit 5 is electrically connected to the fingerprint module 21 and the control unit 6 respectively.

[0083] The image comparison unit 5 is configured to compare a test image with an original image of the pseudo-fingerprint structure 41, and the control unit 6 is configured to determine that the protective film 1 is not peeled off when there is a difference between the test image and the original image.

[0084] Through the above arrangement, when the testing head 4 of the fingerprint testing device moves to the first position, but the test image output by the fingerprint module 21 is inconsistent with the original image of the pseudo-fingerprint structure 41, it can be determined that the protective film 1 is not peeled off, and the protective film 1 needs to be peeled off and then re-detected.

[0085] The image comparison unit 5 can use an image comparison algorithm commonly used in the field, such as a perceptual hashing algorithm, a mean hashing algorithm, a difference perceptual algorithm, a feature extraction algorithm, and the like.

[0086] In this embodiment, since the fool-proof area 101 of the protective film 1 can hinder the penetration of ultrasonic waves, when the protective film 1 is not peeled off, the test image output by the fingerprint module 21 is greatly different from the original image. Therefore, the image comparison unit 5 only needs to perform simple comparison to draw a conclusion, without the need for complex data processing.

[0087] In combination Figure 7 As shown in the figure, in some embodiments, the fingerprint testing device further includes an alarm unit 7. The alarm unit 7 is electrically connected to the control unit 6. The alarm unit 7 is configured to output an alarm signal when it is determined that the protective film 1 is not peeled off.

[0088] Through the above arrangement, when it is determined that the protective film 1 is not peeled off, the alarm unit 7 is used to output an alarm signal, so as to remind the staff to timely peel off the protective film 1, thereby preventing the missed detection or the wrong detection of the electronic device 2.

[0089] It should be noted that in the description of the present application, it should be pointed out that unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements or the interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0090] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise expressly specified and limited.

[0091] In the description of the present application, the description of the terms "some embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the described embodiments or examples are included in at least one embodiment or example of the present application.

[0092] The above is only an embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A protective film, characterized by, The protection film (1) comprises a fool-proof area (101); The fool-proof area (101) is provided with a feature structure (11), and the feature structure (11) is used for preventing a detection signal of a fingerprint module (21) from penetrating the protection film (1).

2. The protective film according to claim 1, characterized by When the detection signal is an ultrasonic wave, the feature structure (11) is filled with air, and the feature structure (11) can prevent the ultrasonic wave from penetrating the protection film (1) by using the internal air.

3. The protective film according to claim 2, characterized in that, The feature structure (11) comprises at least one hole groove (111), and the at least one hole groove (111) is located on a side of the protection film (1) facing the electronic device (2).

4. The protective film according to claim 3, characterized by The hole groove (111) is in a plurality, and the plurality of hole grooves (111) are arrayed in the fool-proof area (101).

5. The protective film (1) according to claim 3, characterized in that The at least one hole groove (111) penetrates to a side of the protection film (1) away from the electronic device (2).

6. The protective film according to claim 3, characterized by The protection film (1) comprises at least two film layers (12) arranged in layers; Among the two adjacent film layers (12), the area outside the fool-proof area (101) is filled with an adhesive material (13), and the area inside the fool-proof area (101) has an air layer (14), and the air layer (14) is formed as the feature structure (11).

7. An electronic device, comprising: The electronic device comprises a fingerprint recognition area (201); When the protection film (1) of any one of claims 1 to 6 is attached to the surface of the electronic device (2), the fool-proof area (101) covers the fingerprint recognition area (201) of the electronic device (2).

8. The electronic device of claim 7, wherein, The electronic device (2) further comprises a display screen (22), and the fingerprint recognition area (201) is located on the display screen (22), and the protection film (1) is attached to the display screen (22).

9. A finger print testing device characterized by, The fingerprint testing device is used for calibrating or testing a fingerprint module (21) of an electronic device (2); and the outer surface of the electronic device (2) is attached with the protection film (1) of any one of claims 1 to 6; The fingerprint testing device comprises a testing platform (3) and a testing head (4). The testing head (4) is movably arranged on one side of the testing platform (3), and the electronic device (2) is placed on the testing platform (3); the testing head (4) has a first position for pressing contact with a fingerprint recognition area (201) of the electronic device (2), and a surface of the testing head (4) in contact with the electronic device (2) is provided with a simulated fingerprint structure (41). The fingerprint module (21) is used for collecting a test image of the simulated fingerprint structure (41) when the testing head (4) is in pressing contact with the fingerprint recognition area (201).

10. The fingerprint testing device of claim 9, wherein, The fingerprint testing device further comprises an image comparison unit (5) and a control unit (6), and the image comparison unit (5) is electrically connected with the fingerprint module (21) and the control unit (6), respectively. The image comparison unit (5) is configured to compare the test image with an original image of the pseudo-fingerprint structure (41), and the control unit (6) is configured to determine that the protective film (1) is not torn when there is a difference between the test image and the original image.

11. The fingerprint testing device of claim 10, wherein, The fingerprint testing device further comprises an alarm unit (7) electrically connected with the control unit (6). The alarm unit (7) is configured to output an alarm signal when it is determined that the protective film (1) is not torn.

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