Fingerprint recognition device, fingerprint recognition method and terminal equipment

Abstract

The present invention discloses a fingerprint recognition device, comprising: a circuit board; a chip, the chip is arranged on the upper surface of the circuit board and is electrically connected to the circuit board through a lead group; a covering layer, the covering layer is arranged on the upper surface of the chip, and a pattern is arranged on the covering layer; wherein the chip comprises: an acquisition module, used to acquire fingerprint data generated when the user's fingerprint covers the covering layer; a processing module, used to generate corrected fingerprint data according to the comparison data and the fingerprint data, and perform fingerprint recognition according to the corrected fingerprint data. The fingerprint recognition device of the embodiment of the present invention is beautiful, coordinated, convenient for users to use, and has a good fingerprint recognition effect, which can improve the user experience. The present invention also discloses a fingerprint recognition method and terminal device.

Description

Technical Field

[0001] The present invention relates to the technical field of fingerprint recognition, and in particular to a fingerprint recognition device, a fingerprint recognition method and a terminal device. Background Art

[0002] In recent years, fingerprint recognition has been widely used in many aspects of social life as a popular, convenient and reliable way of identity authentication. For example, fingerprint recognition is used on smartphones to authenticate identity and protect system and information security. However, because the change in fingerprints is very small, the detection accuracy is required to be very high. If a pattern is made on it, the data of the part with the pattern and the part without the pattern will be different, and even the data of different parts of the pattern will be uneven, affecting the accuracy of fingerprint matching. Therefore, in order to ensure the consistency of fingerprint chip detection data, most of the related technologies do not make patterns on the fingerprint recognition device.

[0003] However, the appearance of the fingerprint recognition device is an important part of the design of the smartphone. If the surface has only one color but no patterns or markings, it will not be very beautiful. Moreover, as the various applications of fingerprint detection chips continue to increase, making patterns on the chip can also play a role in guiding applications. Therefore, for users who have high requirements for product appearance or require personalization, the currently commonly used fingerprint recognition devices cannot meet the requirements. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, the first object of the present invention is to provide a fingerprint recognition device. The device has a beautiful appearance, has a marking function, is convenient for users to use, has a good fingerprint recognition effect, and can improve the user experience.

[0005] The second objective of the present invention is to provide a fingerprint recognition method.

[0006] The third objective of the present invention is to provide a terminal device.

[0007] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a fingerprint recognition device, comprising: a circuit board; a chip, the chip is arranged on the upper surface of the circuit board and is electrically connected to the circuit board through a lead group; a covering layer, the covering layer is arranged on the upper surface of the chip, and a pattern is arranged on the covering layer; wherein the chip comprises: an acquisition module, used to acquire fingerprint data generated when the user's fingerprint covers the covering layer; a processing module, used to generate corrected fingerprint data according to comparison data and the fingerprint data, and perform fingerprint recognition according to the corrected fingerprint data.

[0008] According to the fingerprint recognition device of the embodiment of the present invention, a patterned covering layer is provided on the upper surface of the chip, so that the appearance is more coordinated and beautiful, and can serve as an identification, which is convenient for users to use. The corrected fingerprint data is obtained by comparing the data and the fingerprint data to ensure the accuracy of fingerprint recognition, thereby improving the user experience.

[0009] In addition, the fingerprint recognition device according to the above embodiment of the present invention may also have the following additional technical features:

[0010] According to an embodiment of the present invention, the covering layer is a coating with a pattern sprayed on the upper surface of the chip.

[0011] According to an embodiment of the present invention, the coating layer is formed of at least one color paint, and the coating layer is opaque.

[0012] According to an embodiment of the present invention, the pattern of the coating layer is formed by etching, screen printing or spraying.

[0013] According to an embodiment of the present invention, the cover layer is a patch with a pattern adhered to the upper surface of the chip.

[0014] According to an embodiment of the present invention, the patch is glass, sapphire or ceramic.

[0015] According to one embodiment of the present invention, the pattern of the patch is formed by etching, screen printing or spraying on the upper surface or the lower surface of the patch.

[0016] According to an embodiment of the present invention, the comparison data is data generated when a conductive object covers the covering layer.

[0017] According to an embodiment of the present invention, the processing module is specifically used to calculate the corrected fingerprint data using the following formula:

[0018] X′=Xa*X j ,

[0019] Where X is the fingerprint data, X′ is the corrected fingerprint data, a is the coefficient of variation, and X j is the comparison data.

[0020] According to one embodiment of the present invention, the variation coefficient a is calculated by the following formula:

[0021] a=X z / b,

[0022] Among them, b is a fixed value, X z is the sum of the fingerprint data X.

[0023] To achieve the above-mentioned purpose, the second aspect of the present invention implements a fingerprint recognition method of a fingerprint recognition device as described in the embodiment of the first aspect of the present invention, comprising the following steps: collecting fingerprint data generated when the user's fingerprint covers the covering layer; generating corrected fingerprint data based on the fingerprint data and comparison data, and performing fingerprint recognition based on the corrected fingerprint data.

[0024] According to the fingerprint recognition method of the embodiment of the present invention, the corrected fingerprint data is obtained by comparing data and fingerprint data, so that the accuracy of fingerprint recognition can be guaranteed, thereby improving the user experience.

[0025] In addition, the fingerprint recognition device according to the above embodiment of the present invention may also have the following additional technical features.

[0026] According to an embodiment of the present invention, the comparison data is data generated when a conductive object covers the covering layer.

[0027] According to an embodiment of the present invention, the generating of the corrected fingerprint data according to the comparison data and the fingerprint data includes: calculating the corrected fingerprint data by the following formula:

[0028] X′=Xa*X j ,

[0029] Where X is the fingerprint data, X′ is the corrected fingerprint data, a is the coefficient of variation, and X j is the comparison data.

[0030] In one embodiment of the present invention, the variation coefficient a is calculated by the following formula:

[0031] a=X z / b,

[0032] Among them, b is a fixed value, X z is the sum of the fingerprint data X.

[0033] To achieve the above objective, a third aspect of the present invention provides a terminal device, which includes the fingerprint recognition device of the above embodiment.

[0034] The terminal device of the embodiment of the present invention has a harmonious and beautiful appearance, is convenient for users to use, has a good fingerprint recognition effect, and can improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 is a cross-sectional schematic diagram of a fingerprint recognition device according to an embodiment of the present invention;

[0037] Figure 2 is a cross-sectional schematic diagram of a fingerprint recognition device according to another embodiment of the present invention;

[0038] Figure 3 , Figure 4 , Figure 5 , Figure 6 is a schematic diagram of a pattern according to an embodiment of the present invention;

[0039] Figure 7 is a schematic diagram of fingerprint collection according to an embodiment of the present invention;

[0040] Figure 8 is a flow chart of a fingerprint recognition method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0042] The following describes a fingerprint recognition apparatus, a fingerprint recognition method and a terminal device according to embodiments of the present invention with reference to the accompanying drawings.

[0043] Figure 1 FIG. 4 is a cross-sectional schematic diagram of a fingerprint recognition device according to an embodiment of the present invention.

[0044] like Figure 1 As shown, the fingerprint recognition device includes: a circuit board 10, a chip 20 and a covering layer 30.

[0045] The chip 20 is disposed on the upper surface of the circuit board 10 and is electrically connected to the circuit board 10 through a lead set.

[0046] Specifically, in one embodiment of the present invention, Figure 1 As shown, the chip 20 includes a chip plastic package 21 and a chip wafer 22 . The chip wafer 22 is electrically connected to the circuit board 10 through a lead set 40 and solder 50 .

[0047] The cover layer 30 is disposed on the upper surface of the chip 20 .

[0048] In one embodiment of the present invention, the covering layer may be a coating with a pattern sprayed on the upper surface of the chip.

[0049] The coating is formed by at least one color coating, and the coating is opaque. The pattern of the coating can be formed by, but is not limited to, etching, screen printing or spraying.

[0050] Specifically, Figure 1 As shown, the coating is disposed on the upper surface of the chip 20. The coating can be of various colors but is opaque. A pattern can be etched (such as by laser etching) on ​​the upper surface of the coating, or screen-printed on the upper surface of the coating to form a pattern. Different colors of paint can also be sprayed on the upper surface of the chip 20 in multiple times.

[0051] In another embodiment of the present invention, Figure 2 As shown, the cover layer 30 may be a patch with a pattern bonded to the upper surface of the chip 20 through an adhesive layer 60 .

[0052] Specifically, the patch can be transparent, such as glass, sapphire, etc. In this case, the pattern of the patch can be made on the lower surface of the patch, and the manufacturing method includes but is not limited to etching, screen printing and spraying. The patch can also be opaque, such as ceramic, etc. In this case, the pattern of the patch can be made on the upper surface of the patch, and the manufacturing method includes but is not limited to etching, screen printing and spraying.

[0053] The etching may be but is not limited to laser etching, and the spraying may be but is not limited to color spraying.

[0054] In one embodiment of the present invention, the pattern on the coating or patch includes but is not limited to Figure 3 , Figure 4 , Figure 5 and Figure 6 The triangle, square, circle and regular hexagon shown.

[0055] It should be noted that etching, such as commonly used laser etching, etches away a portion of the coating or patch surface so that the user can see the etched pattern. However, the surface of the coating or patch will be uneven, and the consistency of the collected fingerprint data will be affected. Spraying is to spray at least one color of paint onto the upper surface of the chip 20 or the upper or lower surface of the patch once or multiple times to form a pattern. However, if the spraying is performed in multiple layers, the thickness of the upper surface of the chip 20 or the upper or lower surface of the patch will be different. Even if different colors of paint are sprayed on the same layer and the spraying thickness is the same, the difference in properties of different colors of paint (such as dielectric constant) will also affect the consistency of the collected fingerprint data.

[0056] In order to reduce the above-mentioned influence and ensure the accuracy of fingerprint recognition, the chip 20 further includes: a collection module 23 and a processing module 24 (neither of which are shown in the figure).

[0057] The collection module 23 is used to collect fingerprint data generated when the user's fingerprint covers the covering layer.

[0058] Specifically, Figure 7As shown, the user covers the cover layer 30 with the fingerprint of the finger, and the fingerprint data generated by the user's fingerprint is collected by the sensing unit (ie, the collection module 23) on the chip 20.

[0059] The processing module 24 is used to generate corrected fingerprint data according to the comparison data and the fingerprint data, and perform fingerprint recognition according to the corrected fingerprint data.

[0060] The comparison data is data generated when the conductive material covers the covering layer 30 .

[0061] In one embodiment of the present invention, the processing module 24 is specifically configured to calculate the corrected fingerprint data using the following formula (1):

[0062] X′=Xa*X j (1)

[0063] Among them, X is the fingerprint data, X′ is the modified fingerprint data, a is the coefficient of variation, and X j For comparison data.

[0064] Furthermore, in one embodiment of the present invention, the above-mentioned variation coefficient a can be calculated by the following formula (2):

[0065] a=X z / b (2)

[0066] Among them, b is a fixed value, X z is the sum of fingerprint data X.

[0067] It should be noted that the calculation method of the variation coefficient a is not limited to the above formula (2).

[0068] Specifically, after the fingerprint recognition device has produced the pattern, it covers the upper surface of the cover layer 30 with a conductive rubber block or other conductive material, and reads the data, that is, compares the data, and stores the compared data in the chip 20 of the fingerprint recognition device.

[0069] When the fingerprint recognition device is used normally, the collected fingerprint data is calculated with this data to eliminate the influence of the surface pattern. Since the influence of fingerprints with different changes is different, the formula X'=Xa*X j Calculate the corrected fingerprint data, that is, the fingerprint data without the influence of the cover layer 30, where X is the collected fingerprint data, X′ is the corrected fingerprint data, and X j is the above comparison data, a is the coefficient of variation, which is proportional to the average value of the fingerprint data X, that is, a = X z / b,X z is the sum of the collected fingerprint data X, and b is a fixed value. Therefore, the pattern made on the surface of the fingerprint recognition device will not affect the accuracy of the fingerprint recognition function.

[0070] The fingerprint recognition device of the embodiment of the present invention has a more coordinated and beautiful appearance by providing a patterned covering layer on the upper surface of the chip, and can serve as an identification, making it convenient for users to use. The corrected fingerprint data is obtained by comparing data and fingerprint data to ensure the accuracy of fingerprint recognition, thereby improving the user experience.

[0071] Figure 8 This is a fingerprint recognition method of a fingerprint recognition device as in the above embodiment according to an embodiment of the present invention. Figure 8 As shown, the fingerprint recognition method includes:

[0072] S101, collecting fingerprint data generated when a user's fingerprint covers the covering layer.

[0073] S102, generating corrected fingerprint data according to the fingerprint data and the comparison data, and performing fingerprint recognition according to the corrected fingerprint data.

[0074] The comparison data is data generated when the conductive object covers the covering layer.

[0075] Specifically, the corrected fingerprint data is calculated by the following formula (1):

[0076] X′=Xa*X j (1)

[0077] Where X is the fingerprint data, X′ is the corrected fingerprint data, a is the coefficient of variation, and X j is the comparison data, b is a fixed value, X z is the sum of fingerprint data X.

[0078] Further, in one embodiment of the present invention, the variation coefficient a can be calculated by the following formula (2):

[0079] a=X z / b (2)

[0080] Among them, b is a fixed value, X z is the sum of fingerprint data X.

[0081] It should be noted that the specific implementation of the fingerprint recognition method of the embodiment of the present invention is included in the specific implementation of the fingerprint recognition device of the above embodiment of the present invention, and will not be described here in order to reduce redundancy.

[0082] The fingerprint recognition method of the embodiment of the present invention can obtain corrected fingerprint data by comparing data and fingerprint data, thereby ensuring the accuracy of fingerprint recognition and improving user experience.

[0083] Furthermore, the present invention discloses a terminal device, which includes the fingerprint recognition device of the above embodiment of the present invention.

[0084] In one embodiment of the present invention, the terminal device includes but is not limited to a smart phone, a tablet computer, a laptop computer or a fingerprint access control system.

[0085] The terminal device of the embodiment of the present invention has a coordinated and beautiful appearance, is easy for users to use, has a good fingerprint recognition effect, and can improve user experience.

[0086] In addition, other structures and functions of the terminal device according to the embodiment of the present invention are known to ordinary technicians in the field and are not described here to reduce redundancy.

[0087] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0088] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0092] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fingerprint recognition device, characterized in that: include: Circuit boards; A chip, wherein the chip is arranged on the upper surface of the circuit board, the chip comprises a chip plastic package and a chip wafer, and the chip wafer is electrically connected to the circuit board through a lead set and solder; A covering layer, wherein the covering layer is arranged on the upper surface of the chip and has a pattern thereon, wherein the covering layer is a coating with a pattern sprayed on the upper surface of the chip, wherein the coating is formed by at least one color coating and is opaque; Wherein, the chip comprises: A collection module, used for collecting fingerprint data generated when the user's fingerprint covers the covering layer; a processing module, used to generate corrected fingerprint data according to the comparison data and the fingerprint data, and perform fingerprint recognition according to the corrected fingerprint data, wherein the comparison data is data generated when the conductive object covers the covering layer; The processing module is specifically used for: The corrected fingerprint data is calculated by the following formula: ， in, is the fingerprint data, for the corrected fingerprint data, is the coefficient of variation, is the comparison data; The coefficient of variation is calculated by the following formula : ， in, is a fixed value, The fingerprint data The sum of .

2. The fingerprint recognition device according to claim 1, characterized in that: The pattern of the coating is formed by etching, screen printing or spraying.

3. The fingerprint recognition device according to claim 1, characterized in that: The covering layer is a patch with patterns adhered to the upper surface of the chip.

4. The fingerprint recognition device according to claim 3, characterized in that: The patch is made of glass, sapphire or ceramic.

5. The fingerprint recognition device according to claim 4, characterized in that: The pattern of the patch is formed by etching, screen printing or spraying on the upper surface or the lower surface of the patch.

6. A fingerprint recognition method of the fingerprint recognition device according to any one of claims 1 to 5, comprising the following steps: Collecting fingerprint data generated when the user's fingerprint covers the covering layer; Generating corrected fingerprint data according to the fingerprint data and the comparison data, and performing fingerprint recognition according to the corrected fingerprint data, wherein the comparison data is data generated when the conductive object covers the covering layer; The step of generating the corrected fingerprint data according to the comparison data and the fingerprint data comprises: The corrected fingerprint data is calculated by the following formula: ， in, is the fingerprint data, for the corrected fingerprint data, is the coefficient of variation, is the comparison data; The coefficient of variation is calculated by the following formula : ， in, is a fixed value, The fingerprint data The sum of .

7. A terminal device, comprising: A fingerprint recognition device as claimed in any one of claims 1 to 5.

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