Fingerprint identification module with fillet

Abstract

The utility model discloses a fingerprint identification module with a fillet, which comprises a capacitive fingerprint chip, decorative ink and a substrate, the capacitive fingerprint chip is arranged on the upper surface of the substrate, the capacitive fingerprint chip is provided with at least one side fillet, and the decorative ink covers the side fillet of the capacitive fingerprint chip. The side edge of the fingerprint identification module adopts the fillet design, so that the phenomenon of oil accumulation at the fillet can be avoided.

Description

Technical Field

[0001] The utility model relates to fingerprint recognition technology, in particular to a fingerprint recognition module. Background Art

[0002] With the rapid development of the terminal industry, fingerprint recognition technology has received more and more attention, and the practical application of under-screen fingerprint recognition technology with better performance has become a need of the public.

[0003] There are two main types of fingerprint recognition modules: capacitive fingerprint recognition modules and optical fingerprint recognition modules. For capacitive fingerprint recognition modules, for the sake of aesthetics, decorative ink is usually applied on the sides and the periphery of the upper surface of the capacitive fingerprint chip 1. However, if Figure 1 As shown, the edges of the capacitive fingerprint chip 1' are all right-angle structures. The decorative ink 2' is liquid when it is not solidified. The liquid decorative ink 2' will form uneven oil accumulation at the right angles of the capacitive fingerprint chip 1' due to uneven tension. The oil accumulation not only affects the appearance, but in serious cases, the accumulated decorative ink 2' will also spread to the photosensitive area 11' of the capacitive fingerprint chip 1'; in addition, the uneven thickness of the decorative ink 2' may also affect the sensing ability of the capacitive fingerprint chip 1'. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a fingerprint recognition module, the side of which adopts a rounded corner design to avoid oil accumulation at the rounded corner.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A fingerprint recognition module with rounded corners comprises a capacitive fingerprint chip, decorative ink and a substrate, wherein the capacitive fingerprint chip is arranged on the upper surface of the substrate, the capacitive fingerprint chip has at least one side rounded corner, and the decorative ink covers the side rounded corner of the capacitive fingerprint chip.

[0007] Furthermore, the upper surface of the capacitive fingerprint chip includes a photosensitive area and a binding area, and the binding area is located outside one side of the photosensitive area; the side fillet is located on a side of the capacitive fingerprint chip away from the binding area.

[0008] Furthermore, the number of the side rounded corners is two.

[0009] Furthermore, the angle of the side fillet is between 80° and 00°.

[0010] Furthermore, the capacitive fingerprint chip also has at least one side right angle, and the side right angle is located on a side surface of the capacitive fingerprint chip close to the binding area.

[0011] Furthermore, the number of the side right angles is two.

[0012] Furthermore, there is a first distance between the photosensitive area and the side rounded corner, and a second distance between the photosensitive area and the side right angle, and the first distance is smaller than the second distance.

[0013] Furthermore, the upper surface of the capacitive fingerprint chip includes a photosensitive area and a peripheral area, and the peripheral area is located outside the photosensitive area; the decorative ink also covers the peripheral area of ​​the capacitive fingerprint chip.

[0014] Furthermore, the decorative ink also covers the upper surface of the substrate.

[0015] Furthermore, the decorative ink is black ink, white ink or color ink.

[0016] The utility model has the following beneficial effects: the fingerprint recognition module of the utility model designs the side corners of the capacitive fingerprint chip covered by the decorative ink as rounded corner structures. When the decorative ink is in an uncured liquid state, the tension of the decorative ink is evenly distributed along the tangent direction of the rounded corners at the side corners, and oil accumulation does not occur. A film layer with the same thickness can be formed on the side and the side corners of the capacitive fingerprint chip, which not only improves the aesthetics and sensing capability, but also prevents the photosensitive area of ​​the capacitive fingerprint chip from being contaminated by the decorative ink due to oil accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a planar structural diagram of an existing fingerprint recognition module.

[0018] Figure 2 This is a planar structural diagram of the fingerprint recognition module provided by the utility model.

[0019] Figure 3 for Figure 2 The planar structure diagram of the fingerprint recognition module shown is when it is not covered with decorative ink.

[0020] Figure 4 This is a planar structural diagram of another fingerprint recognition module provided by the utility model.

[0021] Figure 5 for Figure 4 The planar structure diagram of the fingerprint recognition module shown is when it is not covered with decorative ink.

[0022] Figure 6 This is a side structural diagram of the fingerprint recognition module provided by the utility model. Implementation

[0023] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments 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.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" 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, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0027] like Figure 2 and 3 As shown, a fingerprint recognition module with rounded corners includes a capacitive fingerprint chip 1, decorative ink 2 and a substrate 3, wherein the capacitive fingerprint chip 1 is arranged on the upper surface of the substrate 3, and the decorative ink 2 covers at least one side of the capacitive fingerprint chip 1. When the decorative ink 2 covers a certain side of the capacitive fingerprint chip 1, the decorative ink 2 extends to cover the side angle 14 on one end or both ends of the side.

[0028] In this embodiment, the capacitive fingerprint chip 1 is a rectangular chip having four side surfaces, which intersect in sequence to form four side angles 14 , and the decorative ink 2 covers one side surface of the capacitive fingerprint chip 1 and the side angles 14 at both ends of the side surface.

[0029] Of course, the decorative ink 2 can also cover all sides and all side corners 14 of the capacitive fingerprint chip 1 at the same time.

[0030] The capacitive fingerprint chip 1 has at least one side rounded corner 14 a , and the decorative ink 2 covers the side rounded corner 14 a of the capacitive fingerprint chip 1 .

[0031] The fingerprint recognition module of the utility model designs the side corner 14 covered by the decorative ink 2 on the capacitive fingerprint chip 1 as a rounded structure. When the decorative ink 2 is in an uncured liquid state, the tension of the decorative ink 2 is evenly distributed along the tangent direction of the rounded corner at the side corner 14a, and oil accumulation does not occur. A film layer with the same thickness can be formed on the side and the side corner 14a of the capacitive fingerprint chip 1, which not only improves the aesthetics and sensing ability, but also prevents the photosensitive area 11 of the capacitive fingerprint chip 1 from being contaminated by the decorative ink 2 due to oil accumulation.

[0032] In this embodiment, the angle of the side fillet 14a is preferably between 80° and 100°.

[0033] In a preferred embodiment, among the four side corners 14 of the capacitive fingerprint chip 1, two are the side rounded corners 14a, and two are the side right angles 14b; wherein the decorative ink 2 covers the two side rounded corners 14a and the side surfaces between the two side rounded corners 14a.

[0034] When only part of the side angle 14 of the capacitive fingerprint chip 1 is the side rounded corner 14a, the decorative ink 2 can also cover the side right angle 14b and the side edges on one or both ends of the side right angle 14b, depending on specific product requirements.

[0035] In the best embodiment, if Figure 4 and 5 As shown, all side corners 14 of the capacitive fingerprint chip 1 are rounded corners 14 a, and the decorative ink 2 covers all side rounded corners 14 a and all side surfaces of the capacitive fingerprint chip 1 .

[0036] When preparing the capacitive fingerprint chip 1, firstly, a capacitive fingerprint chip 1 whose four side angles 14 are all the side right angles 14b is manufactured according to the existing process, and then part or all of the side right angles 14b on the capacitive fingerprint chip 1 are polished into the side rounded corners 14a by CNC process.

[0037] The upper surface of the capacitive fingerprint chip 1 includes a photosensitive area 11 and a binding area 13, and the binding area 13 is located outside one side of the photosensitive area 11; dense wiring is arranged between the photosensitive area 11 and the binding area 13 of the capacitive fingerprint chip 1, and the binding area 13 needs to be bound to the substrate 3 by gold wire punching, thereby realizing the circuit connection between the capacitive fingerprint chip 1 and the substrate 3.

[0038] Considering that there are more wirings on the side of the capacitive fingerprint chip 1 close to the binding area 13, if the side fillet 14a is made here, it is easy to damage the wiring in the capacitive fingerprint chip 1 during CNC grinding. The capacitive fingerprint chip 1 has fewer wirings away from the binding area 13, and it is easier to grind the side right angle 14b. Therefore, preferably, the side fillet 14a is located on the side of the capacitive fingerprint chip 1 away from the binding area 13.

[0039] The two side angles 14 of the capacitive fingerprint chip 1 on the side close to the binding area 13 can be retained as 14b between the side surfaces, that is, the capacitive fingerprint chip 1 has at least one side right angle 14b, and the side right angle 14b is located on a side surface of the capacitive fingerprint chip 1 close to the binding area 13.

[0040] The photosensitive area 11 has a first distance from the side rounded corner 14a, and a second distance from the side right angle 13b. The first distance is smaller than the second distance to prevent the decorative ink from overflowing and contaminating the photosensitive area 11 due to oil accumulation at the side angle 13b.

[0041] Of course, if the grinding accuracy allows and the wiring layout is optimized, the two side corners 14 close to the binding area 13 can also be CNC-grinded into the side rounded corners 14a. Therefore, preferably, all side corners 14 of the capacitive fingerprint chip 1 are CNC-grinded into the side rounded corners 14a.

[0042] Preferably, Figure 6 As shown, the upper surface of the capacitive fingerprint chip 1 includes a photosensitive area 11 and a peripheral area 12, and the peripheral area 12 is located outside the photosensitive area 11; the decorative ink 2 also covers the peripheral area 12 of the capacitive fingerprint chip 1, but needs to avoid the binding area 13. The decorative ink 2 also covers the upper surface of the substrate 3 to block the gap between the substrate 3 and the capacitive fingerprint chip 1, improve the appearance, and form an integrated visual effect between the substrate 3 and the capacitive fingerprint chip 1.

[0043] The decorative ink 2 may be, but is not limited to, black ink, white ink, or color ink.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A fingerprint recognition module with rounded corners, comprising a capacitive fingerprint chip, decorative ink and a substrate, wherein the capacitive fingerprint chip is arranged on the upper surface of the substrate, characterized in that: The capacitive fingerprint chip has at least one side rounded corner, and the decorative ink covers the side rounded corner of the capacitive fingerprint chip.

2. The fingerprint recognition module according to claim 1, characterized in that: The upper surface of the capacitive fingerprint chip includes a photosensitive area and a binding area, and the binding area is located outside one side of the photosensitive area; the side fillet is located on a side of the capacitive fingerprint chip away from the binding area.

3. The fingerprint recognition module according to claim 1 or 2, characterized in that: The number of the side rounded corners is two.

4. The fingerprint recognition module according to claim 1 or 2, characterized in that: The angle of the side fillet is between 80° and 100°.

5. The fingerprint recognition module according to claim 2, characterized in that: The capacitive fingerprint chip also has at least one side right angle, and the side right angle is located on a side surface of the capacitive fingerprint chip close to the binding area.

6. The fingerprint recognition module according to claim 5, characterized in that: The number of the side right angles is two.

7. The fingerprint recognition module according to claim 5, characterized in that: The photosensitive area has a first distance from the side rounded corner, and the photosensitive area has a second distance from the side right angle, and the first distance is smaller than the second distance.

8. The fingerprint recognition module according to claim 1, characterized in that: The upper surface of the capacitive fingerprint chip includes a photosensitive area and a peripheral area, and the peripheral area is located outside the photosensitive area; the decorative ink also covers the peripheral area of ​​the capacitive fingerprint chip.

9. The fingerprint recognition module according to claim 1, characterized in that: The decorative ink also covers the upper surface of the substrate.

10. The fingerprint recognition module according to claim 1, characterized in that: The decorative ink is black ink, white ink or color ink.

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