KR101778934B1 - Fingerprint sensor module - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a fingerprint sensor module that can give aesthetic feel to an external design. A fingerprint sensor module according to an embodiment of the present invention includes a base substrate, a fingerprint sensor, a first light diffuser, and a second light diffuser. Here, the fingerprint sensor is mounted on the base substrate. The first light diffusing portion is mounted on the base substrate and is formed so as to surround the fingerprint sensor. The second light diffusing portion is mounted on the base substrate and is located at the outer periphery of the first light diffusing portion. Here, the second light diffusing unit firstly diffuses the light and transmits the light to the first light diffusing unit, and the first light diffusing unit receives the light emitted from the second light diffusing unit and performs secondary diffusion to emit light.

Description

Fingerprint sensor module {FINGERPRINT SENSOR MODULE}

FIELD OF THE INVENTION The present invention relates to a fingerprint sensor module, and more particularly, to a fingerprint sensor module capable of giving aesthetics to an appearance design.

Background Art [0002] A fingerprint sensor is a sensor for detecting fingerprints of a human being and is widely used as a means for enhancing security in portable electronic devices such as a mobile terminal and a tablet PC. That is, the user is registered and authenticated through the fingerprint sensor, thereby protecting the data stored in the portable electronic device and preventing the security accident in advance.

On the other hand, in a portable electronic device, a navigation function for performing operation of a pointer such as a cursor is integrated into a fingerprint sensor. Such a fingerprint sensor is referred to as a biometric track pad (BTP). In addition, a switching function that receives information from a user may be incorporated into the fingerprint sensor.

Types of fingerprint sensors include capacitive, optical, ultrasonic, thermal, and non-contact. Among them, the capacitive type fingerprint sensor has recently been widely used because of its excellent sensitivity, robustness against changes in the external environment, and excellent compatibility with portable electronic devices.

The fingerprint sensor easily attaches the fingerprint sensor to various electronic devices and manufactures it in the form of a module including peripheral parts and structures for an efficient interface with electronic devices.

In recent years, there has been an increasing demand for design along with a demand for slimming of portable electronic devices from consumers, and accordingly, various attempts have been made to add design to such module type fingerprint sensors.

1 is an exemplary view showing an example of a conventional portable electronic device.

As shown in FIG. 1, the fingerprint sensor module 10 of the conventional portable electronic device 20 may be integrated with a physical function key. Such a function key can serve as a home key, for example, to perform a function of returning to an initial screen by exiting a running application, a BACK key for returning the user interface one layer before, Lt; / RTI >

The color of the fingerprint sensor module 10 can be implemented, for example, by applying coloring paint, ultraviolet (UV) vapor deposition, or the like.

Furthermore, attempts to give the user aesthetic sense have evolved into various forms. For example, there is a method of giving a light effect to the appearance of a portable electronic device. However, if a separate component for providing a lighting effect is added to the external design of the portable electronic device, or if the component is structurally complicated, a manufacturing cost may be increased or a manufacturing process may be added.

In order to solve the above-described problems, the present invention provides a fingerprint sensor module that can provide aesthetic feel to the external design.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a base substrate; A fingerprint sensor mounted on the base substrate; A first light diffusion unit mounted on the base substrate and configured to surround the fingerprint sensor; And a second light diffusing unit mounted on the base substrate and positioned at an outer periphery of the first light diffusing unit, wherein the second light diffusing unit primarily diffuses the light and transmits the light to the first light diffusing unit, 1 light diffusing unit receives light emitted from the second light diffusing unit and performs secondary diffusion to emit light.

In an exemplary embodiment of the present invention, a light source may be further provided on an outer periphery of the second light diffusing unit to emit light.

In one embodiment of the present invention, a plurality of light sources may be provided.

In one embodiment of the present invention, the light source may be mounted on the base substrate.

In one embodiment of the present invention, the light source may irradiate light toward the side surface of the second light diffusing portion.

In one embodiment of the present invention, the first light diffusing portion includes a light receiving portion formed at an outer edge of the first light diffusing portion and receiving light emitted from the second light diffusing portion, The first light diffusing portion may have a shin portion forming a body of the first light diffusing portion and diffusing light radiated from the light receiving portion from the inside and radiating to the upper surface.

In one embodiment of the present invention, the shine portion has a thickness greater than that of the light-receiving portion, and may be formed to be stepped with the light-receiving portion.

In an embodiment of the present invention, the second light diffusing unit may be an optical waveguide.

In an embodiment of the present invention, the second light diffusing unit may be located apart from the first light diffusing unit.

In an embodiment of the present invention, the second light diffusion unit may be integrally formed to surround the entire outer periphery of the first light diffusion unit.

In an exemplary embodiment of the present invention, the second light diffusing unit may be divided into at least one of the first light diffusing unit and the second light diffusing unit to partially surround the outer periphery of the first light diffusing unit.

According to an embodiment of the present invention, light radiated from a light source is firstly diffused by a second optical diffusion unit, then diffused by a first light diffusion unit provided to surround the fingerprint sensor, Even release of

Further, according to an embodiment of the present invention, a fingerprint sensor module having a lighting effect can be provided, thereby providing a lighting effect on the appearance of a portable electronic device.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is an exemplary view showing an example of a conventional portable electronic device.
2 is a plan view illustrating a portable electronic device equipped with a fingerprint sensor module according to an embodiment of the present invention.
3 is a perspective view illustrating a fingerprint sensor module according to an embodiment of the present invention.
4 is a plan view illustrating a fingerprint sensor module according to an embodiment of the present invention.
5 is a view illustrating a light path in a fingerprint sensor module according to an embodiment of the present invention.
6 is a perspective view illustrating a fingerprint sensor module according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a plan view of a portable electronic device equipped with a fingerprint sensor module according to an embodiment of the present invention, FIG. 3 is a perspective view showing a fingerprint sensor module according to an embodiment of the present invention, FIG. FIG. 5 is a view illustrating a light path in a fingerprint sensor module according to an exemplary embodiment of the present invention. Referring to FIG.

2 to 5, a fingerprint sensor module 100 according to an embodiment of the present invention includes a base substrate 110, a fingerprint sensor 120, a first light diffusion unit 130, (140).

Here, the fingerprint sensor 120, the first light diffusion unit 130, and the second light diffusion unit 140 may be mounted on the base substrate 110. The first light diffusing unit 130 may be formed to surround the fingerprint sensor 120 and the second light diffusing unit 140 may be disposed at the outer periphery of the first light diffusing unit 130. The second light diffusing unit 140 may diffuse the light received from the light source 150 and transmit the diffused light to the first light diffusing unit 130. The first light diffusing unit 130 receives light emitted from the second light diffusing unit 140 and diffuses the light by secondary diffusion, thereby allowing the fingerprint sensor module 100 to have a light effect have.

In detail, the base substrate 110 may be a printed circuit board. As the base substrate 110, any one of a rigid PCB and a flexible PCB may be employed. In this embodiment, a rigid printed circuit board may be employed.

The fingerprint sensor 120 may be mounted on the base substrate 110. The fingerprint sensor 120 may be mounted on the base substrate 110 by surface mount technology (SMT).

The fingerprint sensor 120 may be a capacitive type, an optical type, an ultrasonic type, a heat sensing type, or a non-contact type according to a driving principle. In the embodiment of the present invention, a capacitive type may be employed.

The fingerprint sensor 120 can sense the fingerprint. For example, the difference in capacitance due to the difference in height between the fingerprint of the finger and the shape of the crest of the fingerprint can be found. The fingerprint image is scanned, You can create an image. The fingerprint sensor 120 may include a sensor circuit.

The fingerprint sensor 120 may be a biometric trackpad (BTP) having a fingerprint detection function and a pointer manipulation function at the same time. Specifically, the fingerprint sensor 120 may further include a pointer manipulation function for sensing movement of a finger, such as a cursor, by sensing whether the user's finger, which is an object, is approaching or changes in capacitance due to the movement.

The fingerprint sensor 120 and the base substrate 110 may be connected by a bonding wire (not shown) or a solder ball. The fingerprint sensor 120 may be a chip on board, a chip on film (COF), a wafer level package (WLP) and a ball grid array (BGA) Type, and the like can be applied.

Further, a bezel 160 may be further included in the vicinity of the fingerprint sensor 120. The bezel 160 may serve as a driving electrode for generating a driving signal. The bezel 160 may be disposed outside the portable electronic device 200 to be visible to the user, or may be disposed internally so as not to be seen.

Further, a lead frame may be attached to the lower portion of the base substrate 110 by resin injection or surface mounting technique. In addition, a dome switch (not shown) may be further included on the opposite side of the base substrate 110. The dome switch can serve to select a program and generate an input signal on a specific screen.

The first light diffusion unit 130 may be mounted on the base substrate 110 and may be formed to surround the fingerprint sensor 120. More specifically, the first light diffusion portion 130 may be provided to surround the outer surface of the bezel 160. The first light diffusion unit 130 may have a height corresponding to the height of the bezel 160.

The first light diffusion part 130 may be made of a polycarbonate (PC) material or an epoxy molding compound (EMC) material.

The second light diffusing unit 140 may be mounted on the base substrate 110 and may be located outside the first light diffusing unit 130.

The second light diffusing unit 140 may be an optical waveguide. For example, a transparent medium may be filled in the second light diffusing part 140, and the light wave may be confined in a transparent medium having a cross-sectional area and propagated in the axial direction of the medium. Accordingly, light can be evenly distributed in the second light diffusing unit 140.

2 to 4, the second light diffusing unit 140 is divided into at least one of the first light diffusing unit 130 and the second light diffusing unit 130 so as to partially surround the outer periphery of the first light diffusing unit 130. However, The diffusion unit 140 may be integrally formed to surround the entire outer periphery of the first light diffusion unit 130.

Further, a light source 150 for irradiating light may be further provided on the outer periphery of the second light diffusion unit 140.

The light source 150 may be a side view LED capable of emitting light toward the side 141 of the second light diffusion unit 140.

In addition, a plurality of light sources 150 may be provided, and light may be uniformly irradiated to the side 141 of the second light diffusion unit 140 as a whole.

The light source 150 may be mounted on the base substrate 110. Alternatively, the light source 150 may be configured in advance at a close distance. For example, a light source for a button key (not shown) installed on the front surface of the portable electronic device 200 may be used. That is, the light source for the function key can be used without mounting the light source to be irradiated on the second light diffusing unit 140 separately on the base substrate 110. By doing so, the degree of freedom .

The light source 150 may emit light of various colors according to a predetermined signal. For example, a lighting effect can be obtained by letting the light source irradiate light of a color preset by the user for each situation such as a call or text transmission.

The light source 150 may be provided at a predetermined distance from the second light diffusing unit 140 or may be provided in close contact with the side surface of the second light diffusing unit 140.

5, the light L emitted from the light source 150 may enter the side of the second light diffusing unit 140. The incoming light L may be incident on the second light diffusing unit 140, which is an optical waveguide, Can be firstly diffused and evenly distributed in the heat exchanger 140, and can be discharged to the outside. Specifically, the light L emitted from the light source 150 may enter the side surface 141 of the second light diffusion portion 140 and then be emitted through the opposite side surface 142, L may be introduced into the first light diffusing unit 130.

The second light diffusing unit 140 may be spaced apart from the first light diffusing unit 130 so that light is transmitted from the second light diffusing unit 140 to the first light diffusing unit 130 A hot spot phenomenon of light which may be generated in the process can be prevented.

Meanwhile, the first light diffusion unit 130 may have a light receiving unit 131 and a shine unit 135.

The light receiving unit 131 may be formed at the outer edge of the first light diffusing unit 130 and the light emitted from the second light diffusing unit 140 may be received.

The shine portion 135 may form the body of the first light diffusion portion 130 and may be connected to the light receiving portion 131. In other words, the light receiving portion 131 can be formed at the outer edge of the shine portion 135. [

The light L received by the light receiving unit 131 can be secondarily diffused inside the light receiving unit 131 and the shine unit 135. [ The light L that has flowed into the shine portion 135 can be uniformly distributed throughout the shine portion 135 while being diffused and can be emitted to the upper surface 136 of the shine portion 135. In other words, the first light diffusing unit 130 allows the light L to flow into the outer surface, that is, the outer surface 132 of the light receiving unit 131, and the upper surface, that is, the upper surface 136 So that light can be emitted evenly. The fingerprint sensor module 100 according to the embodiment of the present invention can realize a lighting effect on the external appearance of the portable electronic device 200 by such uniform emission of light.

Here, the upper surface 136 of the shine portion 135 may be formed to have a slope of a certain angle, and the upper surface 136 of the shine portion 135 may be formed to have an increased area, It can be widened to enhance the lighting effect. 5, the upper surface 136 of the shine portion 135 is shown as a straight line, but the present invention is not limited thereto.

The shine portion 135 may have a thickness greater than that of the light receiving portion 131 and the shine portion 135 and the light receiving portion 131 may be stepped.

The shine portion 135 may be positioned at a predetermined height from the upper surface of the base substrate 110 by being placed on the upper surface of the flange 161 formed on the bezel 160. Also, the shiny portion 135 can be fixed by fitting the inner side surface of the bezel 160 to the outer side surface thereof.

The height of the flange 161 formed on the bezel 160 can be appropriately determined according to the height of the light receiving unit 131 required when the first light diffusion unit 130 is coupled to the bezel 160. [ That is, the light receiving unit 131 should be positioned at a height that allows the light emitted from the second light diffusing unit 140 to flow well. The height of the light receiving unit 131 is easily adjusted by the height of the flange 161 And settings.

6 is a perspective view illustrating a fingerprint sensor module according to another embodiment of the present invention.

As shown in FIG. 6, the fingerprint sensor module 1100 according to the present embodiment can be connected to the independent buttons 1200 and 1300. These independent buttons 1200 and 1300 may be electrically connected to each other through the base substrate 1110 of the fingerprint sensor module 1100. [

The independent buttons 1200 and 1300 may be provided on both sides of the fingerprint sensor module 1100 as shown in the figure but may be provided only on one side of the fingerprint sensor module 1100. [ The independent buttons 1200 and 1300 may be key buttons.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100, 1100: fingerprint sensor module 110, 1110: base substrate
120: fingerprint sensor 130: first light diffusion unit
131: light receiving section 132:
140: second light diffusing unit 150: light source

Claims (11)

A base substrate;
A fingerprint sensor mounted on the base substrate;
A first light diffusion unit mounted on the base substrate and configured to surround the fingerprint sensor; And
And a second light diffusing unit mounted on the base substrate and positioned at an outer periphery of the first light diffusing unit,
The second light diffusing unit firstly diffuses light and transmits the light to the first light diffusing unit,
Wherein the first light diffusing unit receives light emitted from the second light diffusing unit and performs secondary diffusion to emit light, wherein the first light diffusion unit and the second light diffusion unit are disposed apart from each other, Wherein the first light diffusing unit prevents hot spot phenomenon of light transmitted to the first light diffusing unit. The method according to claim 1,
And a light source provided on an outer periphery of the second light diffusing unit to irradiate light. 3. The method of claim 2,
Wherein a plurality of the light sources are provided. 3. The method of claim 2,
Wherein the light source is mounted on the base substrate. 3. The method of claim 2,
Wherein the light source irradiates light toward the side of the second light diffusing portion. 3. The method of claim 2,
Wherein the first light diffusing unit comprises:
A light receiving unit formed at an outer edge of the first light diffusing unit and receiving light emitted from the second light diffusing unit,
And a shine portion connected to the light receiving portion and forming a body of the first light diffusing portion, wherein the light introduced from the light receiving portion is radiated to the upper surface after diffused from the inside. The method according to claim 6,
Wherein the shine portion has a thickness greater than that of the light-receiving portion, and is formed to be stepped with the light-receiving portion. The method according to claim 1,
Wherein the second light diffusing portion is an optical waveguide. delete The method according to claim 1,
Wherein the second light diffusing unit is integrally formed to surround the entire outer periphery of the first light diffusing unit. The method according to claim 1,
Wherein the second light diffusing unit is divided into at least one and formed to partially surround an outer periphery of the first light diffusing unit.

Images