KR20170057133A - Pressure sensor and complex device and electronic device having the same - Google Patents

Abstract

The present invention provides a pressure sensor, and a complex device and an electronic device having the same, wherein the pressure sensor comprises: first and second electrode layers spaced from each other; and a dielectric layer provided between the first and second electrode layers. The dielectric layer has a plurality of pores. According to the present invention, provided is the pressure sensor, which can prevent an error of touch input.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure sensor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure sensor, and more particularly, to a pressure sensor capable of preventing a touch input error, a composite device having the same, and an electronic apparatus.

Various types of input devices are used for operating electronic devices such as mobile communication terminals. For example, an input device such as a button, a key, and a touch screen panel is used. The touch screen panel, that is, the touch input device, detects the contact of the human body and can easily and easily operate the electronic device with only a light touch. For example, a touch sensor is used not only for a mobile communication terminal but also for operation of a device in an automobile.

A touch input device used in an electronic device such as a mobile communication terminal may be provided between a protective window and a liquid crystal display panel displaying an image. Accordingly, a character, a symbol, or the like appears through the window from the liquid crystal display panel, and when the user touches the corresponding portion, the touch sensor detects the position and performs specific processing according to the control flow.

The touch input device has technical means for sensing whether a human body (finger) or a pen is in contact with the pen, and sensing and recognizing the human body current by using the pressure or the temperature change. Particularly, a pressure sensor that senses whether a human body or a pen is in contact with the pressure sensor is being spotlighted.

The pressure sensor has a structure in which an air gap or a material such as silicon (or rubber) is provided between two electrodes. Such a pressure sensor can detect the change in capacitance according to the distance between the two electrodes according to the touch input, thereby detecting the pressure. However, in the case of forming the air gap, since the dielectric constant of air is 1, in order to sense the capacitance value according to the change in the gap between the two electrodes, a large amount of change in space between the two electrodes is required. Which requires a large amount of change between the two electrodes.

Korean Patent Publication No. 2014-0023440 Korean Patent No. 10-1094165

The present invention provides a pressure sensor capable of preventing a touch input error.

The present invention provides a pressure sensor capable of precisely sensing a change in the capacitance value with a small change between two electrodes.

The present invention provides a composite device and an electronic apparatus provided with the pressure sensor.

According to an aspect of the present invention, there is provided a pressure sensor comprising: first and second electrode layers spaced apart from each other; And a dielectric layer provided between the first and second electrode layers, wherein the dielectric layer includes a plurality of pores.

The pores are formed in at least two sizes and at least one shape.

The dielectric layer has a porosity of 1% to 95%.

The dielectric layer is different from the other regions in the porosity or pore size of at least one region.

The pore cross sectional area ratio of the vertical cross section of the dielectric layer is smaller than the pore cross sectional area ratio of the horizontal cross section.

The dielectric layer is formed to a thickness of 500 mu m or less.

The dielectric layer has a dielectric constant of 2 to 20.

The dielectric layer further comprises an electromagnetic shielding and absorbing material.

And an insulating layer provided on at least one of the upper side of the first electrode layer, the first and second electrode layers, and the lower side of the second electrode layer.

And first and second connection patterns provided on the first and second electrode layers and connected to each other.

The composite device according to another aspect of the present invention includes the pressure sensor according to one aspect of the present invention and at least one function portion having a function different from that of the pressure sensor.

The pressure sensor enables the function.

The function unit may include: a piezoelectric element provided at one side of the pressure sensor; And a diaphragm provided on one side of the piezoelectric element.

The piezoelectric element is used as a piezoelectric vibrating device or a piezoelectric acoustic device in accordance with an applied signal.

The function unit includes at least one of NFC, WPC, and MST, each of which is provided at one side of the pressure sensor and includes at least one antenna pattern.

The function unit includes at least one of a piezoelectric element provided on one surface of the pressure sensor, a diaphragm provided on one surface of the piezoelectric element, and NFC, WPC and MST provided on one surface of the pressure sensor or one surface of the diaphragm.

And a fingerprint sensing unit electrically connected to the pressure sensor and measuring a difference in acoustic impedance generated by an ultrasonic signal from the pressure sensor and a fingerprint on the floor of the fingerprint.

An electronic apparatus according to another aspect of the present invention includes: a window; A display unit for displaying an image through the window; And a pressure sensor for detecting a position and a pressure of a touch input applied through the window, wherein the pressure sensor includes the pressure sensor according to one aspect of the present invention.

The pressure sensor includes at least one of a first pressure sensor provided below the display unit and at least one second pressure sensor provided below the window.

And a touch sensor provided between the window and the display unit.

A pressure sensor according to embodiments of the present invention may include a dielectric layer formed between first and second electrode layers spaced apart from each other, and the dielectric layer may be formed by compressing and restoring a plurality of pores. Since the dielectric layer includes a plurality of pores, even if the touch pressure of the user is small, a sufficient amount of change between the first and second electrodes can be obtained. Therefore, it is possible to make a pressure sensor having improved data processability with improved resolution according to the variation of the capacitance value.

In addition, since a large amount of change is not required between the first and second electrodes, the thickness can be minimized, and the size of the pressure sensor and the module using the pressure sensor can be reduced.

Meanwhile, the pressure sensor of the present invention may be employed in an electronic device in which a predetermined function is performed through touch input. Further, it may be integrated with a piezoelectric acoustic device or a piezoelectric device functioning as a piezoelectric vibration device, or may be integrated with NFC, WPC and MST.

1 is a sectional view of a pressure sensor according to a first embodiment of the present invention;
Figures 2 to 4 are schematic plan views of first and second electrode layers according to embodiments of the present invention of a pressure sensor.
5 is a sectional view of a pressure sensor according to a second embodiment of the present invention;
6 is a sectional view of a pressure sensor according to a third embodiment of the present invention;
7 is a sectional view of a pressure sensor according to a fourth embodiment of the present invention;
Figures 8 and 9 are schematic plan views of first and second electrode layers in accordance with other embodiments of the present invention of a pressure sensor.
10 and 11 are a front perspective view and a rear perspective view of an electronic apparatus having a pressure sensor according to a first embodiment of the present invention;
12 is a partial cross-sectional view of the state taken along line AA 'in FIG.
13 is a sectional view of an electronic apparatus according to a second embodiment of the present invention;
14 is a schematic plan view showing an arrangement of pressure sensors of an electronic device according to a second embodiment of the present invention;
15 is a cross-sectional view of an electronic device including a pressure sensor according to a third embodiment of the present invention.
16 is a schematic plan view showing an arrangement shape of a pressure sensor of an electronic device according to a fourth embodiment of the present invention;
17 to 20 are diagrams showing the control structure of the pressure sensor according to the embodiments of the present invention.
FIG. 21 is a block diagram for explaining a data processing method of a pressure sensor according to another embodiment of the present invention; FIG.
22 is a configuration diagram of a fingerprint recognition sensor using a pressure sensor according to embodiments of the present invention.
23 is a sectional view of a pressure sensor according to another embodiment of the present invention.
24-28 illustrate a pressure sensor integrated composite device in accordance with various embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

1 is a cross-sectional view of a pressure sensor according to a first embodiment of the present invention, and FIGS. 2 to 4 are schematic views of first and second electrode layers of a pressure sensor.

1, the pressure sensor according to the first embodiment of the present invention includes first and second electrode layers 100 and 200 spaced apart from each other, and a dielectric layer (not shown) provided between the first and second electrode layers 100 and 200 300). At this time, the dielectric layer 300 can be compressed and recovered, and may be formed to have a plurality of pores 310.

One. Electrode layer

The first and second electrode layers 100 and 200 are spaced a predetermined distance in the thickness direction (i.e., the vertical direction), and a dielectric layer 300 is provided therebetween. The first and second electrode layers 100 and 200 may include first and second support layers 110 and 120 and first and second electrodes 120 and 220 formed on the first and second support layers 110 and 210, . ≪ / RTI > The first and second support layers 110 and 210 are spaced apart from each other by a predetermined distance and first and second electrodes 120 and 220 are formed on the surfaces of the first and second support layers 110 and 210, respectively . Here, the first and second electrodes 120 and 220 may be formed facing each other or may not be facing each other. That is, the first and second electrodes 120 and 220 may be formed so as to face the dielectric layer 300, one of which faces the dielectric layer 300 and the other of which faces the dielectric layer 300 And the first and second electrodes 120 and 220 do not face the dielectric layer 300. At this time, the first and second electrodes 120 and 220 may be formed to be in contact with the dielectric layer 300 or not. The pressure sensor according to the present invention includes a first support layer 110, a first electrode 120, a dielectric layer 300, a second electrode 220, and a second support layer 210 stacked from the lower side in the thickness direction A pressure sensor can be implemented. Here, the first and second supporting layers 110 and 210 support the first and second electrodes 120 and 220 so that the first and second electrodes 120 and 220 are formed on one surface of the first and second supporting layers 110 and 210, 1 and the second support layers 110 and 210 may be provided in a plate shape having a predetermined thickness. In addition, the first and second support layers 110 and 210 may be provided in a film form so as to have flexible characteristics. The first and second supporting layers 110 and 210 may be made of silicon, urethane, polyurethane, polyimide, PET, PC, or the like, and may include a photocurable monomer and an oligomer a prepolymer using an oligomer, a photoinitiate, and additives. In addition, the first and second support layers 110 and 210 may be transparent or opaque in some cases. Meanwhile, at least one of the first and second support layers 110 and 210 may be provided with a plurality of pores (not shown). For example, the second support layer 210, which may be deformed downward by the touch or push of an object, may include a plurality of pores. The pores have a size of, for example, 1 탆 to 500 탆 and can be formed with a porosity of 10% to 95%. By forming a plurality of pores in the second support layer 210, the elastic force and the restoring force of the second support layer 210 can be further improved. If the porosity is less than 10%, the improvement of the elasticity and restoring force is insignificant. If the porosity is more than 95%, the shape of the second support layer 210 may not be maintained. Further, it is preferable that pores are not formed on the surface of the support layers 110 and 210 having a plurality of pores. That is, if pores are formed on one surface on which the electrodes 120 and 220 are formed, the electrodes 120 and 220 may be cut off or the thickness of the electrodes may increase. Therefore, pores are formed on one surface of the electrodes 120 and 220 .

Meanwhile, the first and second electrodes 120 and 220 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide). However, the first and second electrodes 120 and 220 may be formed of a transparent conductive material other than such a material, or may be formed of an opaque conductive material such as silver (Ag), platinum (Pt), copper (Cu) have. Also, the first and second electrodes 120 and 220 may be formed in directions intersecting with each other. For example, the first electrodes 120 may be formed in one direction so as to have a predetermined width, and may be spaced apart from each other by a predetermined distance in the other direction. The second electrode 220 may be formed in a different direction orthogonal to one direction so as to have a predetermined width, and may be spaced apart by a predetermined distance in one direction orthogonal to the other direction. That is, the first and second electrodes 120 and 220 may be formed in directions perpendicular to each other as shown in FIG. For example, the first electrodes 120 may be formed to have a predetermined width in the lateral direction, a plurality of the first electrodes 120 may be arranged at predetermined intervals in the longitudinal direction, the second electrodes 220 may be formed in a predetermined width in the longitudinal direction, And can be arranged in a plurality of intervals. Here, the widths of the first and second electrodes 120 and 220 may be equal to or greater than the spacing therebetween. Of course, the widths of the first and second electrodes 120 and 220 may be narrower than the interval therebetween, but the width is preferably larger than the interval. For example, the ratio of the width and spacing of the first and second electrodes 120 and 220 may be between 10: 1 and 0.5: 1. That is, when the interval is 1, the width may be 10 to 0.5. In addition, the first and second electrodes 120 and 220 may be formed in various shapes other than this shape. For example, as shown in FIG. 3, one of the first and second electrodes 120 and 220 is formed entirely on the supporting layer, and the other is a substantially rectangular shape having a predetermined width and spacing in one direction and the other direction As shown in FIG. That is, a plurality of first electrodes 120 may be formed in a substantially rectangular pattern, and a second electrode 220 may be formed entirely on the second support layer 120. Of course, various types of patterns such as circles, polygons and the like are possible in addition to the rectangle. In addition, one of the first and second electrodes 120 and 220 may be formed entirely on the supporting layer and the other may be formed in a grid shape extending in one direction and the other direction. The first and second electrodes 120 and 220 are formed to have a thickness of, for example, 0.1 to 500 m, and the first and second electrodes 120 and 220 may have a thickness of, for example, As shown in FIG. Here, the first and second electrodes 120 and 220 may be in contact with the dielectric layer 300. Of course, the first and second electrodes 120 and 220 are spaced apart from the dielectric layer 300 by a predetermined distance. When a predetermined pressure, for example, a user's touch input, is applied to the first and second electrodes 120 and 220, , 220 may be in contact with the dielectric layer 300 locally. At this time, the dielectric layer 300 may be compressed to a predetermined depth.

Meanwhile, a plurality of holes 130 may be formed in at least one of the first and second electrode layers 100 and 200. For example, as shown in FIG. 4, a plurality of holes 130 may be formed in the first electrode layer 100. That is, the plurality of holes 130 may be formed in an electrode layer used as a ground electrode. Of course, the hole 130 may be formed in the second electrode layer 200 used as a signal electrode in addition to the first electrode layer 100, or may be formed in both the first and second electrode layers 100 and 200. The hole 130 may be formed such that at least one of the first and second electrodes 120 and 220 is removed to expose the first and second supporting layers 110 and 210, The first and second supporting layers 110 and 210 as well as the first and second supporting layers 120 and 220 may be removed. That is, the holes 130 may be formed to expose the supporting layers 110 and 210 by removing the electrodes 120 and 220, or through the supporting layers 110 and 210 from the electrodes 120 and 220 . Also, the holes 130 may be formed in a region where the electrodes 120 and 220 are overlapped. For example, as shown in FIG. 4, a plurality of holes 130 may be formed in the first electrode 120 in a region overlapping the second electrode 220. Here, the hole 130 may be formed in a region overlapping with the second electrode 220, or a plurality of holes 130 may be formed. 2, when the first and second electrodes 120 and 220 are formed in one direction and the other direction orthogonal to the first direction, the first and second electrodes 120 and 220 intersect each other The hole 130 may be formed. By forming the hole 130, the dielectric layer 300 can be more easily compressed. The holes 130 may be formed to have a diameter of, for example, 0.05 mm to 10 mm. If the diameter of the hole 130 is less than 0.05 mm, the compression effect of the dielectric layer 300 may be lowered. If the diameter exceeds 10 mm, the restoring force of the dielectric layer 300 may be lowered. However, the size of the hole 130 can be variously changed depending on the size of the pressure sensor or the input device.

2. Dielectric layer

The dielectric layer 300 is formed to have a predetermined thickness between the first and second electrode layers 100 and 200, and may have a thickness of, for example, 10 m to 5000 m. That is, the dielectric layer 300 may be provided in various thicknesses depending on the size of the electronic device in which the pressure sensor is employed. For example, the dielectric layer 300 may be provided with a thickness of 10 mu m to 5000 mu m, preferably 500 mu m or less, more preferably 200 mu m or less. The dielectric layer 300 is compressible and decompressible and may include a plurality of pores 310. Here, the pores 310 may be formed to have a size of 1 mu m to 10,000 mu m. Here, the size of the pores 310 may be the shortest diameter or the longest diameter, or may be an average diameter. Among them, the shortest diameter may be 1 탆 to 500 탆. For example, the pores 310 may be formed in a size of 1 μm to 10,000 μm, may be formed in a size of 1 μm to 5000 μm, or may be formed in a size of 1 μm to 1000 μm. That is, the size of the pores 310 can be variously changed according to the size of the pressure sensor, the size of the electronic device in which the pressure sensor is employed, the thickness and the width of the dielectric layer 300, and the like. The pores 310 may be formed to have the same size or different sizes. For example, a first pore having an average size of 1 mu m to 300 mu m, a second pore having an average size of 300 mu m to 600 mu m, and a third pore having an average size of 600 mu m to 1000 mu m are mixed The dielectric layer 300 can be formed. At this time, the first to third pores may also have a plurality of sizes. That is, the first to third pores have respective average sizes, and may have a plurality of sizes within each average size. By using the pores 310 having a plurality of sizes in this way, small pores can be formed between the large pores, thereby further improving the porosity. These pores 310 may have various shapes. The cross-sectional shape may be formed, for example, in a circular shape or an elliptical shape, and at least a part may be formed in a shape extended to one side. Also, adjacent pores 310 may be connected at least partially, for example, in the form of peanuts. The size of the pores 310 may be greater than the thickness of the dielectric layer 300, depending on the thickness of the dielectric layer 300. In this case, pores 310 may be formed in the thickness direction of the dielectric layer 300 to provide a space between the first and second electrode layers 100 and 200. However, if the pore 310 is large and the space is provided in the dielectric layer 300, the compressive force is weakened, and a large sensing output can be obtained even with a small contact pressure. That is, the sensing margin can be improved. Also, the pores 310 may be formed with a porosity of 1% to 95%. That is, as the porosity of the dielectric layer 300 is higher, the dielectric layer 300 can be largely compressed even under a small pressure. However, if the porosity of the dielectric layer 300 is too high, it is difficult to maintain the shape of the dielectric layer 300, and a part of the dielectric layer 300 may be collapsed. Accordingly, it is preferable that the plurality of pores 310 have a porosity of 1% to 95% so that they can be compressed to a predetermined size at a predetermined pressure, and a portion of the dielectric layer 300 can be maintained without collapsing. At this time, the higher the porosity, the more the sensitivity can be increased. On the other hand, the porosity can be defined as (the ratio of the cross-sectional area of pores within an arbitrary vertical cross-section of 1 cm 2 + the cross-sectional area ratio of pores within an arbitrary horizontal cross-section of 1 cm 2) / 2. Also, the dielectric layer 300 preferably has the same porosity in all regions. However, the porosity of the dielectric layer 300 may be at least 10% in one region. For example, if at least one region of the dielectric layer 300 has a porosity of about 10% and at least another region has a porosity of 80%, a larger capacitance change value can be sensed in a region having a large porosity, It is possible to sufficiently sense the change value of the electrostatic capacitance by the control unit. In addition, the dielectric layer 300 may have a cross sectional area ratio of the pores 310 of the vertical cross section smaller than a cross sectional area ratio of the pores 310 of the horizontal cross section. That is, the dielectric layer 300 may have a cross sectional area ratio of the pores 310 in the vertical direction in at least one region, preferably the entire region, which is smaller than the cross sectional area ratio in the horizontal direction.

Meanwhile, the dielectric layer 300 can be formed using a material whose thickness can be changed according to a change in pressure. That is, the dielectric layer 300 may be formed using a material capable of being compressed and recovered. In addition, the dielectric layer 300 may be formed of a material including pores 310. For example, the dielectric layer 300 may be formed of a foamable rubber, a foamed silicone, a foamed latex, a foamed urethane, and the like. Also, the dielectric layer 300 may be made of a thermosetting resin. Examples of the thermosetting resin include Novolac Epoxy Resin, Phenoxy Type Epoxy Resin, BPA Type Epoxy Resin, BPF Type Epoxy Resin, , Hydrogenated BPA Epoxy Resin, Dimer Acid Modified Epoxy Resin, Urethane Modified Epoxy Resin, Rubber Modified Epoxy Resin, (DCPD Type Epoxy Resin), and the like. The dielectric layer 300 formed of such a material may have a dielectric constant of 2 or more and 20 or less. Meanwhile, the dielectric layer 300 may further include an electromagnetic wave shielding and absorbing material. The electromagnetic wave shielding and absorbing material may have a smaller size than the pores 310 and may be contained in the pores 310 accordingly. Of course, the electromagnetic wave shielding and absorbing material may have a size larger than the pores 310 and may be contained in the dielectric layer 300 where the pores 310 are not formed. In addition, the electromagnetic wave shielding and absorbing material may have a smaller size than the pores 310 and may be contained in the dielectric layer 300 in which the pores 310 are not formed. Of course, the electromagnetic wave shielding and absorbing material may have a plurality of sizes larger or smaller than the pores 310 and may be contained in the dielectric layer 300, some of which are contained within the pores 310 or the pores 310 are not formed . Thus, the electromagnetic wave shielding and absorbing material is further contained in the dielectric layer 300, so that the electromagnetic wave can be shielded or absorbed. The electromagnetic wave shielding and absorbing material may include ferrite, alumina, and the like, and may be contained in the dielectric layer 300 in an amount of 0.01 wt% to 50 wt%. That is, the electromagnetic wave shielding and absorbing material may be contained in an amount of 0.01% by weight to 50% by weight based on 100% by weight of the material of the dielectric layer 300. If the content of the electromagnetic wave shielding and absorbing material is less than 0.01% by weight, electromagnetic wave shielding and absorption characteristics are low, and if it exceeds 50% by weight, the compression characteristics of the dielectric layer 300 may be deteriorated.

As described above, the pressure sensor according to an embodiment of the present invention may include a dielectric layer 300 having a plurality of pores 310 between first and second electrode layers 100 and 200 spaced from each other. That is, the dielectric layer 300 may have a plurality of pores 310 having a porosity of 1% to 95%. Therefore, it is possible to manufacture a pressure sensor which can obtain sufficient data by increasing the amount of change between the first and second electrodes 120 and 220 even with a small pressure, thereby improving the resolution according to the variation of the capacitance value, have. In addition, since a large amount of change is not required between the first and second electrodes, the thickness can be minimized, and the size of the pressure sensor and the module using the pressure sensor can be reduced.

5 is a cross-sectional view of a pressure sensor according to a second embodiment of the present invention.

5, the pressure sensor according to the second embodiment of the present invention includes first and second electrode layers 100 and 200 spaced apart from each other, and a plurality of second electrode layers 100 and 200 disposed between the first and second electrode layers 100 and 200 And a dielectric layer (300) comprising pores (310). In addition, the dielectric layer 300 may further include a cutout 320 formed at a predetermined width and depth in at least one region. By forming the cutout portion 320, the flexible characteristic can be improved, and the amount of change according to the pressure can be further increased. That is, since the dielectric layer 300 includes the pores 310, the amount of change due to the pressure is large, but the amount of change due to the pressure can be further increased by forming the cut-out portion 320.

The dielectric layer 300 may be formed to have a predetermined width and an interval in one direction and the other direction opposite to the one direction. That is, the dielectric layer 300 may have a cutout 320 formed at a predetermined depth, and may be divided into a plurality of portions at predetermined widths and intervals. At this time, the cut-out portion 320 may have a plurality of first cut-out portions having a predetermined width in one direction, and a plurality of second cut-out portions having predetermined widths in the other direction orthogonal thereto. Thus, the dielectric layer 300 can be divided into a plurality of unit cells each having a predetermined width and spacing by the plurality of first and second cutouts. At this time, the entire thickness of the dielectric layer 300 may be cut, and the thickness of 50% to 95% of the entire thickness may be cut. That is, the entire thickness of the dielectric layer 300 may be cut, or 50% to 95% of the entire thickness may be cut to form a cut portion. By cutting the dielectric layer 300 in this manner, the dielectric layer 300 has a predetermined flexible characteristic. At this time, the dielectric layer 300 may have a size of, for example, about 10 mu m to about 5000 mu m and may be cut so as to have a gap of 1 mu m to 300 mu m. That is, the unit cell may have a size of about 10 to 5000 m and have an interval of 1 to 300 [mu] m by the cutout part 320. [ Meanwhile, the first and second cutouts of the dielectric layer 300 may correspond to the intervals between the electrodes of the first and second electrode layers 100 and 200. That is, the first cut portion may be formed to correspond to the interval of the first electrode of the first electrode layer 100, and the second cut portion may be formed to correspond to the interval of the second electrode of the second electrode layer 200. At this time, the interval between the electrode layers and the cutout portion may be the same or the interval between the electrode layers may be larger or smaller than the interval of the cutout portion. Meanwhile, the dielectric layer 300 may be cut by a laser, a dicing, a blade cut, or the like, or an incision may be formed by using a metal mold.

6 is a cross-sectional view of a pressure sensor according to a third embodiment of the present invention.

Referring to FIG. 6, the pressure sensor according to the third embodiment of the present invention includes first and second electrode layers 100 and 200 spaced apart from each other, a first electrode layer 100 and a second electrode layer 200 disposed between the first and second electrode layers 100 and 200, A dielectric layer 300 having a plurality of cut-outs 320 formed in the direction of the dielectric layer 300 and an elastic layer 400 formed on the cut-out portion 320 of the dielectric layer 300. At this time, the cut-out portion 320 may be formed over the entire thickness of the dielectric layer 300 and may have a predetermined thickness. That is, the cut-out portion 320 may be formed to have a thickness of 50% to 100% of the thickness of the dielectric layer 300. Accordingly, the dielectric layer 300 may be separated by unit cells by a predetermined distance in one direction and the other direction by the cutouts 320, and the elastic layer 400 may be formed between the unit cells.

The elastic layer 400 may be formed using a polymer having elasticity, silicon, or the like. That is, the elastic layer 400 may use the same material as the dielectric layer 300 or other materials. Since the elastic layer 400 is formed, it is possible to maintain the shape of the dielectric layer 300 and have a higher flexibility characteristic than the other embodiments of the present invention in which the elastic layer 400 is not formed. That is, since the dielectric layer 300 includes a plurality of pores 310, the shape of the dielectric layer 300 may not be maintained. However, since the elastic layer 400 is formed in a predetermined region, The shape of the dielectric layer 300 can be maintained. If the elastic layer is not formed in the dielectric layer 300, the flexible property of the dielectric layer 300 may be limited. However, when the dielectric layer 300 is completely cut and the elastic layer 400 is formed The flexible characteristics can be improved to such a degree that the dielectric layer 300 can be rounded or folded. Of course, the elastic layer 400 may be formed so as to fill the cut-out portion 320 formed in a certain thickness without forming the cut-out portion 320 in the entire thickness of the dielectric layer 300.

7 is a cross-sectional view of a pressure sensor according to a fourth embodiment of the present invention. 8 and 9 are schematic plan views of the first and second electrode layers according to other embodiments.

7, the pressure sensor according to the fourth embodiment of the present invention includes first and second electrode layers 100 and 200 spaced apart from each other and a first electrode layer 100 and a second electrode layer 200 disposed between the first and second electrode layers 100 and 200 And a dielectric layer (300) comprising pores (310). The first and second electrode layers 100 and 200 include first and second support layers 110 and 210 and first and second electrodes 120 and 120 formed on the first and second support layers 110 and 210, , 220). That is, the pressure sensor according to the fourth embodiment has the same configuration as the pressure sensor according to the first embodiment described with reference to Fig. At this time, the first and second electrodes 120 and 220 may be formed to face each other or not face to face. The first and second electrodes 120 and 220 may be formed entirely on the first and second support layers 110 and 210 as shown in FIG. That is, the first and second electrodes 120 and 220 may be formed to have a predetermined pattern as shown in FIGS. 2 and 3. However, as shown in FIG. 8, the first and second electrodes 120 and 220 may be formed on the support layers 110 and 210 as a whole . The first and second electrode layers 100 and 200 of this shape can be applied to a pressure sensor provided for detecting pressure in a local area. That is, in order to detect the pressure in a plurality of areas of the electronic device using one pressure sensor, electrodes 120 and 220 formed in a predetermined pattern as shown in FIGS. 2 and 3 may be used, The electrodes 120 and 220 formed on the support layers 110 and 210 as shown in FIG. 8 may be used. However, regardless of the shape of the electrodes 120 and 220, both local pressure detection and overall pressure detection may be possible depending on the size of the pressure sensor, etc., and various electrode shapes and detection regions are possible depending on the application or hardware specification to be used .

In addition, even when the electrodes 210 and 220 formed on the support layers 110 and 210 are used, the dielectric layer 300 can be formed in a shape as shown in FIGS. 5 and 6. 5, a predetermined cutout 320 may be formed in the dielectric layer 300, and an elastic layer 400 may be formed in the cutout 320 as shown in FIG. 6 .

Meanwhile, the pressure sensor according to the present invention may have openings 130 and 230 formed in a predetermined area. 9, the first and second electrode layers 100 and 200 are formed in a predetermined shape, and openings 130 and 230 are formed in predetermined regions of the first and second electrode layers 100 and 200 . The openings 130 and 230 may be provided such that another function unit having a function different from that of another pressure sensor or pressure sensor can be inserted. Although not shown, the dielectric layer 300 may be formed with openings overlapping the openings formed in the first and second electrode layers 100 and 200. Here, a pressure sensor may be used to enable another pressure sensor or function to be inserted into the openings 130, 230. That is, by applying power to another pressure sensor or function that is inserted into the openings 130 and 230 using a pressure sensor, or simultaneously with or after a predetermined time when power is applied to the pressure sensor by application or hardware, 230 may be powered by another pressure sensor or function. Meanwhile, the first and second electrode layers 100 and 200 may be formed in different shapes. 9, the first electrode layer 100 is formed entirely on the first support layer 110, and the second electrode layer 200 is formed on the first support layer 110, 2 supporting layer 210. The plurality of supporting layers 210 may be spaced apart from each other by a predetermined distance. For example, the second electrode 210 includes a first region 210a having a substantially rectangular shape, second and third regions 220b and 220c having a substantially rectangular shape formed with the opening 230 therebetween, A fourth region 220d formed in a rectangular shape may be formed with a predetermined spacing. A first connection pattern 140 may be formed on the first support layer 110 and a second connection pattern 240 may be formed on the second support layer 210. At this time, the first connection pattern 140 is formed in contact with the first electrode 110, and the second connection pattern 240 is formed apart from the fourth region 220d. In addition, the first and second connection patterns 140 and 240 may be formed so as to overlap at least a part thereof. Of course, although not shown, a third connection pattern may be formed between the first and second connection patterns 140 and 240 in at least a portion of the dielectric layer 300 between the first and second electrode layers 100 and 200 . That is, the third connection pattern may be formed apart from the dielectric layer 300. Accordingly, the first and second connection patterns 140 and 240 may be connected through the third connection pattern. The second electrode layer 200 may include first to fourth extension patterns 250a, 250b, 250c, and 250d extending from the first to fourth regions 210a to 210d, A fifth elongated pattern 250e may be formed extending from the first elongated pattern 240. The first to fifth extension patterns 250a to 250d may extend to a connector (not shown) and be connected to a control unit or a power supply unit. Therefore, a predetermined power source, for example, ground power may be applied to the first connection pattern 140 through the fifth extension pattern 250e, the second connection pattern 240, and the third connection pattern. In addition, the voltages sensed by the first to fourth regions 220a to 220d can be transmitted to the connector through the first to fourth extension patterns 250a to 250d. Of course, a predetermined power source, for example, driving power may be applied to the first to fourth regions 220a and 220d through the first to fourth extension patterns 250a to 250d.

The pressure sensor according to the above embodiments is provided in an electronic device such as a smart phone and can detect touch or pressure of a user. An electronic device including the pressure sensor according to embodiments of the present invention will now be described with reference to the drawings.

FIGS. 10 and 11 are a front perspective view and a rear perspective view of an electronic apparatus having a pressure sensor according to an embodiment of the present invention, and FIG. 12 is a partial cross-sectional view taken along line A-A 'of FIG. Here, an embodiment of the present invention will be described by taking a mobile terminal including a smart phone as an example of an electronic device having a pressure sensor, and FIGS. 10 to 12 schematically show major parts related to the present invention.

10 to 12, an electronic device 1000 includes a case 1100 forming an external appearance, a plurality of function modules for performing a plurality of functions of the electronic device 1000 in the case 1100, Circuit and the like are provided. The case 1100 may include a front case 1110, a rear case 1120, and a battery cover 1130. Here, the front case 1110 may form an upper portion and a side portion of the electronic device 1000, and the rear case 1120 may form a side portion and a lower portion of the electronic device 1000. That is, at least a part of the front case 1110 and at least a part of the rear case 1120 can form the side surface of the electronic device 1000, and a part of the front case 1110 is part of the upper surface portion excluding the display portion 1310 . Also, the battery cover 1130 may be provided to cover the battery 1200 provided on the rear case 1120. Meanwhile, the battery cover 1130 may be provided integrally or detachably. That is, when the battery 1200 is integrated, the battery cover 1130 may be integrally formed, and when the battery 1200 is removable, the battery cover 1130 may also be detachable. Of course, the front case 1110 and the rear case 1120 may be integrally formed. That is, the case 1100 is formed so as to close the side surface and the rear surface of the front case 1110 and the rear case 1120 without exposing the top surface, and the battery cover 1130 covers the rear surface of the case 1100 . At least a part of the case 1100 may be formed by injection molding of a synthetic resin or may be formed of a metal material. That is, at least a part of the front case 1110 and the rear case 1120 may be formed of a metal material. For example, the side surface of the electronic device 1000 may be formed of a metal material. Of course, the battery cover 1130 may also be formed of a metal material. The metal material used for the case 1100 may include, for example, stainless steel (STS), titanium (Ti), aluminum (Al), or the like. In the space formed between the front case 1110 and the rear case 1120, various components such as a liquid crystal display device, a display unit, a pressure sensor, a circuit board, and a haptic device may be incorporated.

The front case 1110 may include a display unit 1310, an audio output module 1320, a camera module 1330a, and the like. A microphone 1340, an interface 1350, and the like may be disposed on one side of the front case 1110 and the rear case 1120. That is, a display unit 1310, an audio output module 1320, a camera module 1330a, and the like are disposed on the top surface of the electronic device 1000, and a microphone 1340 is mounted on one side, An interface 1350, and the like. The display unit 1310 is disposed on the upper surface of the electronic device 1000 and occupies most of the upper surface of the front case 1110. That is, the display unit 1310 is provided in a substantially rectangular shape having predetermined lengths in the X and Y directions, and includes a central region on the upper surface of the electronic apparatus 1000, . A predetermined space not occupied by the display unit 1310 is provided between the outer periphery of the electronic device 1000, i.e., the outer periphery of the front case 1110, and the display unit 1310, An audio output module 1320 and a camera module 1330a are provided on the upper side and a user input section including a front input unit 1360 is provided on the lower side. A bezel area may be provided between the display portion 1310 and the rim of the electronic device 1000 between the two edges of the display portion 1310 extending in the X direction and the rim of the electronic device 1000, have. Of course, a separate bezel area may not be provided and the display unit 1310 may be extended to the edge of the electronic device 1000 in the Y direction.

The display unit 1310 outputs time information and can input tactile information of the user. The display unit 1310 may be provided with a touch input device. The touch input device includes a window 2100 covering a front surface of a terminal body, a display unit 2200 such as a liquid crystal display device for outputting start information, a display unit 2200 for inputting touch or pressure information of a user, A first pressure sensor 2300 according to at least one of the first and second embodiments. The touch input device may further include a touch sensor provided between the window 2100 and the display unit 2200. That is, the touch input device may include a touch sensor and a first pressure sensor 2300. For example, a plurality of electrodes may be formed on a transparent plate having a predetermined thickness and spaced apart from each other by a predetermined distance in one direction and another direction orthogonal to the predetermined direction, and a dielectric layer may be provided therebetween to detect a touch input of a user. That is, in the touch sensor, a plurality of electrodes are arranged in a lattice pattern, for example, and a capacitance according to a distance between electrodes according to a touch input of a user can be detected. Here, the touch sensor detects coordinates in the horizontal direction, i.e., mutually orthogonal X direction and Y direction, which the user touches, and the first pressure sensor 2300 detects not only the X direction and the Y direction but also the coordinates in the vertical direction, Can be detected. That is, the touch sensor and the first pressure sensor 2300 simultaneously detect the coordinates in the X direction and the Y direction, and the first pressure sensor 2300 can further detect the coordinates in the Z direction. Thus, the touch sensor and the first pressure sensor 2300 simultaneously detect the horizontal coordinate, and the first pressure sensor 2300 detects the vertical coordinate, so that the touch coordinates of the user can be more accurately detected.

An audio output module 1320, a camera module 1330a, a front input unit 1360, and the like may be provided in an area other than the display unit 1310 on the upper surface of the front case 1110. [ At this time, the sound output module 1320 and the camera module 1330a are provided on the upper side of the display portion 1310 in the X direction, and the user input portion such as the front input portion 1360 is provided on the lower side of the display portion 1310 in the X direction . The front input unit 1360 may include a touch key, a push key, or the like, and may be configured without a front input unit 1350 using a touch sensor or a pressure sensor. The function module 3000 for the function of the front input unit 1360 may be provided inside the case 1100 under the front input unit 1360 in the lower side of the front input unit 1360, that is, in the Z direction. That is, a function module that performs a function of a touch key or a push key may be provided according to a driving method of the front input unit 1360, and a touch sensor or a pressure sensor may be provided. Also, the front input unit 1360 may include a fingerprint recognition sensor. That is, the fingerprint of the user can be recognized through the front-face input unit 1360 and a legitimate user can be detected. To this end, the function module 3000 may include a fingerprint recognition sensor. On the other hand, a second pressure sensor 2400 may be provided on one side and the other side of the front input unit 1360 in the Y direction. The second pressure sensor 2400 is provided on both sides of the front input unit 1360 as a user input unit to detect a touch input of the user and return to a previous screen and a setting function for setting a screen of the display unit 1310 . At this time, the front input unit 1360 using the fingerprint recognition sensor may perform a function of returning to the initial screen as well as the fingerprint recognition of the user. Meanwhile, a haptic feedback device such as a piezoelectric vibrating device may be further provided in contact with the display portion 1310 to provide feedback in response to a user's input or touch. The haptic feedback device may be provided in a predetermined area of the electronic device 1000 other than the display unit 1310. For example, a haptic feedback device may be provided on the outer region of the acoustic output module 1310, the outer region of the front input portion 1360, and the bezel region. Of course, the haptic feedback device may be provided on the lower side of the display unit 1310.

Although not shown in the side of the electronic device 1000, a power supply unit and a side input unit may be further provided. For example, the power supply unit and the side input unit may be provided on two sides of the electronic device facing each other in the Y direction, and may be provided on one side of the power supply unit and the side input unit. The power supply can be used to turn the electronic device on and off, and can be used to enable or disable the screen. The side input unit may be used to adjust the size of the sound output from the sound output module 1320, for example. At this time, the power supply unit and the side input unit may be constituted by a touch key, a push key, or the like, or may be constituted by a pressure sensor. That is, the electronic device according to the present invention may be provided with pressure sensors in a plurality of areas other than the display part 1310. For example, it is possible to control the pressure of the sound output module 1320 and the camera module 1330a on the upper side of the electronic device, the pressure control of the lower side front input part 1360 and the pressure of the side power supply part and the side input part At least one pressure sensor may be further provided.

11, a camera module 1330b may be additionally mounted on the rear surface of the electronic device 1000, that is, the rear case 1120. [ The camera module 1330b may have a photographing direction substantially opposite to that of the camera module 1330a and may be a camera having different pixels from the camera module 1330a. A flash (not shown) may be additionally disposed adjacent to the camera module 1330b. Further, although not shown, a fingerprint recognition sensor may be provided below the camera module 1330b. That is, the fingerprint recognition sensor may not be provided on the front input unit 1360 and the fingerprint recognition sensor may be provided on the rear surface of the electronic device 1000. [

The battery 1200 may be provided between the rear case 1120 and the battery cover 1300, and may be fixed or detachable. At this time, the rear case 1120 may be recessed to provide a region for inserting the battery 1200, and after the battery 1200 is mounted, the battery cover 1130 contacts the battery 1200, (Not shown).

12, a bracket 1370 is provided between the display unit 1310 and the rear case 1130 in the electronic apparatus 1000, and a window 2100, a display unit 2200 and a pressure sensor 2300 may be provided. That is, the touch input device according to the present invention may be provided on the bracket 1370 of the display portion 1310, and the bracket 1370 supports the touch input device. In addition, the bracket 1370 may be extended to a region other than the display portion 1310. That is, as shown in FIG. 12, a bracket 1370 may be extended to an area where the front input unit 1360 is formed. Further, at least a part of the bracket 1370 may be supported on at least a part of the front case 1110. For example, the bracket 1370 extended to the outside of the display unit 1310 may be supported by an extension extending from the front case 1110. A partition wall having a predetermined height may be formed on the bracket 1370 in the boundary region between the display unit 1310 and the outside thereof. The bracket 1370 supports the pressure sensor 2400 and the function module 3000 such as a fingerprint sensor. Although not shown, on the bracket 1370, there are provided at least one sensor for supplying power to the function module 3000 such as pressure sensors 2300 and 2400, a fingerprint sensor, and the touch sensor, A printed circuit board (PCB) or a flexible printed circuit board (FPCB) provided with a driving means of a flexible printed circuit board (FPCB) may be provided.

As described above, at least one pressure sensor according to the embodiments of the present invention may be provided in a predetermined area of the electronic device. For example, the display unit 1310 and the user input unit may be provided as described above, or any one of them may be provided. However, at least one pressure sensor may be provided in a predetermined area in the electronic device. Various embodiments of the electronic device according to the present invention in which the pressure sensor is provided in a plurality of areas will be described as follows.

13 is a cross-sectional view of an electronic apparatus according to a second embodiment of the present invention, which is a cross-sectional view of a touch input device provided on the display unit 1310. In Fig.

13, the electronic device according to the second embodiment of the present invention includes a window 2100, a display portion 2200, a pressure sensor 2300, and a bracket 1370.

The window 2100 is provided on the display unit 2200 and is supported by at least a part of the front case 1310. [ Further, the window 2100 forms the upper surface of the electronic device, and an object such as a finger, a stylus pen, or the like is contacted. The window 2100 may be made of a transparent material, for example, an acrylic resin, glass, or the like. The window 2100 may be formed on the upper surface of the electronic device 1000 outside the display unit 1310 as well as the display unit 1310. That is, the window 2100 may be formed to cover the upper surface of the electronic device 1000.

The display unit 2200 displays an image to the user through the window 2100. The display unit 2200 may include a liquid crystal display (LCD) panel, an organic light emitting display (OLED) panel, and the like. When the display unit 2200 is a liquid crystal display panel, a backlight unit (not shown) may be provided below the display unit 2200. The backlight unit may include a reflective sheet, a light guide plate, an optical sheet, and a light source. The light source may be a light emitting diode (LED). At this time, the light source may be provided on the lower side of the optical structure in which the reflection sheet, the light guide plate, and the optical sheet are laminated, or may be provided on the side surface. The liquid crystal material of the liquid crystal display panel responds to the light source of the backlight unit and outputs a character or image according to the input signal. On the other hand, a light shielding tape (not shown) is attached between the display portion 2200 and the backlight unit to block light leakage. The light-shielding tape may be configured such that a pressure-sensitive adhesive is applied to both sides of the polyethylene film. The display portion 2200 and the backlight unit are bonded to the adhesive of the light shielding tape and the light of the backlight unit can not escape to the outside of the display portion 2200 by the polyethylene film inserted into the light shielding tape. On the other hand, when the backlight unit is provided, the pressure sensor 2300 may be provided below the backlight unit, or may be provided between the display unit 2200 and the backlight unit.

The pressure sensor 2300 may include a first and a second electrode layers 100 and 200 and a dielectric layer 300 provided between the first and second electrode layers 100 and 200. The first and second electrode layers 100 and 200 are formed on the first and second support layers 110 and 210 and the first and second support layers 110 and 210 respectively and are described with reference to FIGS. And the first and second electrodes 120 and 220 may have at least one of the shapes. At this time, the first and second electrodes 120 and 220 may be arranged to face each other with the dielectric layer 300 therebetween. However, the first and second electrodes 120 and 220 may be formed so that one of them faces the dielectric layer 300 and the other does not face the dielectric layer 300, as shown in FIG. That is, the first electrode layer 100 is formed such that the first electrode 120 is formed below the first support layer 110 so that the first electrode 120 does not face the dielectric layer 300, and the second electrode layer 200 The second electrode 220 may be formed on the lower side of the second support layer 210 so that the second electrode 220 faces the dielectric layer 300. In other words, the first electrode 120, the first support layer 110, the dielectric layer 300, the second electrode 220, and the second support layer 210 may be sequentially formed from the lower side to the upper side. Also, the pressure sensor 2300 may be formed with adhesive layers 410, 420, and 400 at the lowermost layer and the uppermost layer. The adhesive layers 410 and 420 may be provided to adhere and fix the pressure sensor 2300 between the display portion 2200 and the bracket 1370. The adhesive layers 410 and 420 may be a double-sided adhesive tape, an adhesive tape, an adhesive, or the like. A first insulating layer 510 may be provided between the first electrode layer 100 and the adhesive layer 410 and a second insulating layer 520 may be provided between the dielectric layer 300 and the second electrode 220. have. The insulating layers 510, 520, and 500 may be formed using a material having an elastic force and a restoring force. For example, the insulating layers 510 and 520 can be formed using silicon, rubber, gel, Teflon tape, or urethane having a hardness of 30 or less. In addition, a plurality of pores may be formed in the insulating layers 510 and 520. The pores have a size of, for example, 1 탆 to 500 탆 and can be formed with a porosity of 10% to 95%. By forming a plurality of pores in the insulating layers 510 and 520, the elasticity and restoring force of the insulating layers 510 and 520 can be further improved. Here, the first and second supporting layers 110 and 210 are each formed to a thickness of 50 to 150 탆, the first and second electrodes 120 and 220 are each formed to a thickness of 1 to 500 탆, The dielectric layer 300 may be formed to a thickness of 10 mu m to 5000 mu m. That is, the dielectric layer 300 may be formed to be equal to or thicker than the first and second electrode layers 100 and 200, and the first and second electrode layers 100 and 200 may have the same thickness. However, the first and second electrode layers 100 and 200 may be formed to have different thicknesses depending on materials, for example, the second electrode layer 200 may be formed to be thinner than the first electrode layer 100 . The first and second insulating layers 510 and 520 are each formed to a thickness of 3 to 500 탆 and the first and second adhesive layers 410 and 420 are formed to have a thickness of 3 to 1000 탆, . At this time, the first and second insulating layers 510 and 520 are formed to have the same thickness, and the first and second adhesive layers 410 and 420 may have the same thickness. However, the insulating layers 510 and 520 may have different thicknesses and the adhesive layers 410 and 420 may have different thicknesses. For example, the first adhesive layer 410 may be thicker than the second adhesive layer 420 .

The bracket 1370 is provided above the rear case 1120 as shown in Fig. The bracket 1370 supports the upper touch sensor, the display portion 2200, and the pressure sensor 2300 so that the pressing force of the object is not dispersed. The bracket 1370 may be formed of a material whose shape is not deformed. That is, the bracket 1370 prevents the pressing force of the object from being dispersed, and may be formed of a material that does not deform its shape due to the pressure because it supports the touch sensor, the display portion 2200, and the pressure sensor 2300. At this time, the bracket 1370 may be formed of a conductive material or an insulating material. Further, the bracket 1370 may be formed as a corner or a whole bending structure, that is, a bent structure. By providing the bracket 1370 in this way, the pressing force of the object can be concentrated without being dispersed, and the touch area can be detected more accurately.

On the other hand, the pressure sensor may be formed on the whole area below the display part 2200 or on at least a part of the area below the display part 2200. The arrangement of the pressure sensors is shown in Fig. FIG. 14 is a schematic plan view showing an arrangement of pressure sensors of an electronic device according to a second embodiment of the present invention, and shows the arrangement of the pressure sensor 2300 with reference to the display portion 2200. FIG.

As shown in FIG. 14A, the pressure sensor 2300 may be provided along the edge of the display portion 2200. At this time, the pressure sensor 2300 is provided at a predetermined width from the edge of the substantially rectangular display portion 2200, that is, the edge, and may be provided with a predetermined length. That is, a pressure sensor 2300 having a predetermined width is provided along two sides of the display unit 2200, and a pressure sensor 2300 having a predetermined width along two short sides may be provided. Accordingly, four pressure sensors 2300 may be provided along the edge of the display unit 2200, and one pressure sensor 2300 may be provided along the edge of the display unit 2200.

As shown in FIG. 14B, the pressure sensor 2300 may be provided in a region other than the predetermined width of the edge of the display portion 2200.

14 (c), the pressure sensor 2300 may be provided in a region where the two adjacent sides of the display portion 2200 meet, that is, in the vertex region. That is, the pressure sensor 2300 may be provided at the four corner areas of the display unit 2200.

A pressure sensor 2300 is provided in the remaining area except for the edge area of the display part 2200 and a filler such as double sided tape is provided in the remaining area where the pressure sensor 2300 is not provided, (2310) may be provided.

A plurality of pressure sensors 2300 may be provided at substantially equal intervals below the display portion 2200 as shown in FIG. 14 (e).

Of course, a filling material 2310 such as a double-faced tape may be provided in an area where the pressure sensor 2300 is not provided in Figs. 14A, 14C, and 14D.

Meanwhile, any one of the first and second electrode layers 100 and 200 of the present invention may be formed on the bracket 1370. That is, the bracket 1370 can function as the first and second electrode layers 100 and 200. In this case, the first electrode 120 or the second electrode 220 may be formed on the bracket 1370. Accordingly, the bracket 1370 can be used as the supporting layer of the first electrode layer 100 or the second electrode layer 200. [ Fig. 15 shows an electronic apparatus including the pressure sensor according to the third embodiment of the present invention. FIG. 15 illustrates a case where the first electrode 120 is formed on the bracket 1370. At this time, though not shown, a touch sensor may be further provided between the window 2100 and the display unit 2200.

The bracket 1370 may be used as the first electrode layer. That is, the bracket 1370 can be used as a ground electrode. In order to use the bracket 1370 as the first electrode layer, that is, the ground electrode, the bracket 1370 may be formed of an insulating material and the first electrode 120 may be formed on the bracket 1370. The first electrodes 120 may be arranged in one direction to have a predetermined width and a predetermined interval, and may be formed in a predetermined pattern. In addition, the first electrode 120 may be formed entirely on the bracket 1370. At this time, the first electrode 120 on the bracket 1370 is formed to overlap at least a part with the second electrode 220 of the second electrode layer 200. That is, the first and second electrodes 120 and 220 may be formed to overlap with each other such that capacitance changes according to the distance between the first electrode 120 and the second electrode 220. Meanwhile, the first electrode 120 formed on the bracket 1370 may be formed of a transparent conductive material. However, the first electrode 120 may be formed of an opaque conductive material such as copper, silver, or gold. The ground potential may be applied to the bracket 1370 through the first electrode 120. That is, a signal of a predetermined potential may be applied through the second electrode layer 200 and a ground potential may be applied through the bracket 1370. Accordingly, the distance between the second electrode layer 200 and the bracket 1370 becomes closer to the reference distance according to the touch of the object, thereby changing the capacitance between the second electrode layer 200 and the bracket 1370 .

The embodiments of the present invention have been described with reference to the case where the pressure sensor 2300 is provided between the display portion 2200 and the bracket 1370. However, the pressure sensor 2300 may be provided between the window 2100 and the display portion 2200, or between the display portion 2200 and the backlight unit.

Further, the pressure sensor may be provided in an area other than the display part 1310. [ At this time, at least one pressure sensor may be provided in an area other than the display part 1310, and the arrangement of the pressure sensor is shown in Fig. FIG. 16 is a schematic plan view showing an arrangement configuration of a pressure sensor of an electronic device according to a fourth embodiment of the present invention, and shows an arrangement shape of the pressure sensor 2400 based on the window 2100. FIG.

As shown in FIG. 16A, the pressure sensor 2400 may be provided along the edge of the window 2100. At this time, the pressure sensor 2400 is provided at a predetermined width from the edge of the substantially rectangular window 2100, that is, the edge, and may be provided with a predetermined length. That is, a pressure sensor 2400 having a predetermined width is provided along two long sides of the window 2100, and a pressure sensor 2400 having a predetermined width along two short sides may be provided. In other words, the pressure sensor 2400 may be provided in an area other than the display part 1310, that is, an upper side and a lower side of the display part 1310, and a bezel area. At this time, four pressure sensors 2400 may be provided along the edge of the window 2100, and one may be provided along the edge of the window 2100.

As shown in FIG. 16B, the pressure sensor 2400 may be provided along the long side edge of the window 2100. That is, the pressure sensor 2400 may be provided in an area between the edge of the display part 1310 and the edge of the electronic device 1000, that is, a bezel area.

As shown in FIG. 16C, the pressure sensor 2400 may be provided in an area where the two adjacent sides of the window 2100 meet, that is, in the vertex area. That is, the pressure sensor 2400 may be provided at the four corner areas of the window 2100.

As shown in Fig. 16 (d), the pressure sensor 2400 may be provided along the short side edge of the window 2100. Fig.

A plurality of pressure sensors 2400 may be provided at predetermined intervals along the long side and the short side edge of the window 2100, as shown in FIG. 16 (d). At this time, the plurality of pressure sensors 2400 may be provided at substantially equal intervals.

A pressure sensor 2400 is provided in each of the four corner areas of the window 2100 and the area between the pressure sensors 2400, i.e., the long side and the short side edge of the window 2100, A filler 2410 such as an adhesive tape may be provided in the area.

FIG. 17 is a control configuration diagram of a pressure sensor according to an embodiment of the present invention, and is a control configuration diagram of a pressure sensor including first and second pressure sensors 2300 and 2400. FIG.

17, the control structure of the pressure sensor according to an embodiment of the present invention includes a controller 2500 for controlling the driving of at least one of the first pressure sensor 2300 and the second pressure sensor 2400 can do. The control unit 2500 may include a driving unit 2510, a detecting unit 2520, a converting unit 2530, and a calculating unit 2540. At this time, the controller 2500 including the driving unit 2510, the detecting unit 2520, the converting unit 2530, and the calculating unit 2540 may be implemented as a single integrated circuit (IC). Thus, the outputs of at least one pressure sensor 2300, 2400 can be processed using one integrated circuit (IC).

The driving unit 2510 applies a driving signal to at least one of the pressure sensors 2300 and 2400. That is, the driving unit 2510 applies a driving signal to the first pressure sensor 2300 and the second pressure sensor 2400 or applies a driving signal to the first pressure sensor 2300 or the second pressure sensor 2400 . To this end, the driving unit 2510 may include a first driving unit for driving the first pressure sensor 2300 and a second driving unit for driving the second pressure sensor 2400. However, the driving unit 2510 may be a single unit, and may apply driving signals to the first and second pressure sensors 2300 and 2400. That is, one driving unit 2510 can apply driving signals to the first and second pressure sensors 2300 and 2400, respectively. When the first and second pressure sensors 2300 and 2400 are respectively configured in plural numbers, the driving unit 2510 may apply driving signals to the plurality of pressure sensors 2300 and 2400. The driving signal from the driving unit 2510 may be applied to either the first or second electrode 120 or 220 constituting the first or second pressure sensor 2300 or 2400. For example, the driving unit 2510 may apply a predetermined driving signal to the second electrode 220. At this time, the driving signals applied to the first and second pressure sensors 2300 and 2400 may be the same or different from each other. The driving signal may be a square wave, a sine wave, a triangle wave, or the like having a predetermined period and amplitude, and may be sequentially applied to each of the plurality of first electrodes 220. Of course, the driving unit 2510 may apply a driving signal to the plurality of first electrodes 220 at the same time or selectively apply a driving signal selectively to only a part of the plurality of first electrodes 220.

The detection unit 2520 detects the output signals of the pressure sensors 2300 and 2400. That is, the detection unit 2520 detects the capacitance from the plurality of first electrodes 120 of the pressure sensor 2400. When a predetermined signal is applied to the second electrode 220 and a ground potential is applied to the first electrode 120 facing the first electrode 120, the distances between the first and second electrodes 120 and 220 are the same Capacitance. However, when the distance between the first and second electrodes 120 and 220 in at least one region is shortened due to the touch of the user, the capacitance between them becomes larger than the other portions. Therefore, the detection unit 2520 detects a change in the electrostatic capacitance between the first and second electrodes 120 and 220 of the pressure sensors 2300 and 2400 to detect the input. Here, the detection unit 2520 may include first and second detection units for detecting the capacitances of the first and second pressure sensors 2300 and 2400, respectively. However, one detecting unit 2520 can detect all of the capacitances of the first and second pressure sensors 2300 and 2400. For this purpose, the detecting unit 2520 detects the first and second pressure sensors 2300 and 2400, It is possible to sequentially detect the electrostatic capacitance of the capacitor. Thus, the detection unit 2520 can detect the area to be touched and the pressure of the area by detecting the capacitance of the pressure sensors 2300 and 2400. For example, when a user touches a finger, there may be a central region where the center of the finger is contacted and the pressure is transmitted the largest, and a peripheral region where a pressure less than the central region is transmitted. The touch area of the central area is maximally transmitted, so that the distance between the first and second electrodes is close to that of the center area, and the distance between the first and second electrodes is larger than that of the center area, Is larger than the peripheral region. Accordingly, by detecting the capacitances of the plurality of regions and comparing them, it is possible to detect the central region where the pressure is most largely transmitted and the peripheral region to which the pressure smaller than the central region is delivered. As a result, Can be detected. Of course, the area that the user does not touch has an initial capacitance lower than the surrounding area. The detector 2520 may include a plurality of CV converters (not shown) each having at least one operational amplifier and at least one capacitor, and the plurality of CV converters may include first and second pressure sensors 2300 , And 2400, respectively. A plurality of C-V converters may convert an electrostatic capacity into a voltage signal to output an analog signal. For this purpose, for example, each of the plurality of C-V converters may include an integrating circuit for integrating capacitance. The integrating circuit can integrate the capacitance to change it to a predetermined voltage and output it. On the other hand, when the drive signal is sequentially applied to the plurality of second electrodes from the driving unit 2510, the capacitance can be simultaneously detected from the plurality of first electrodes, so that the number of the CV converters is equal to the number of the first electrodes .

The conversion unit 2530 converts the analog signal output from the detection unit 2520 into a digital signal to generate a detection signal. For example, the conversion unit 2530 may convert a time-to-analog (TDC) signal into a digital signal, which is a time-to-analog (TDC) signal, that measures the time at which the analog signal output from the detection unit 2520 reaches a predetermined reference voltage level, (Digital-to-Digital Converter) circuit for measuring the amount of change of the level of the analog signal output from the detection unit 2520 for a predetermined time and converting it into a detection signal, which is a digital signal, .

The calculation unit 2540 determines the contact input applied to the first and second pressure sensors 2300 and 2400 using the detection signal. Coordinates, and pressures applied to the first and second pressure sensors 2300 and 2400 using the detection signal. The detection signal serving as a basis for determining the touch input by the operation unit 2540 may be data obtained by digitizing a change in the capacitance. Particularly, data indicating the difference between the capacitance when the touch input is not generated and the capacitance when the touch input is generated Lt; / RTI >

The control unit 2500 can determine the touch input of the first and second pressure sensors 2300 and 2400 and transmit it to the main control unit of the host 4000 such as an electronic apparatus. That is, the control unit 2500 uses the signals input from the pressure sensors 2300 and 2400 using the detecting unit 2520, the converting unit 2530, and the calculating unit 2540, and outputs X, Y coordinate data and Z pressure data . The generated X, Y coordinate data and Z pressure data are transmitted to the host 4000. The host 4000 uses the X, Y coordinate data and the Z pressure data, for example, using the main controller, And pressure.

The control unit 2500 may include a first control unit 2500a for processing the output of the first pressure sensor 2300 and a second control unit 2500b for processing the output of the second pressure sensor 2400 . 17, one control unit 2500 for processing the outputs of the first and second pressure sensors 2300 and 2400 has been described. However, the control unit 2500 controls the first and second pressure sensors 2300 and 2400, And first and second control units 2500a and 2500b for processing outputs of the sensors 2300 and 2400, respectively. Here, the first controller 2500a may include a first driver 2510a, a first detector 2520a, a first converter 2530a, and a first calculator 2540a, and the second controller 2500b may include a first controller 2500a, A second detecting unit 2520b, a second converting unit 2530b, and a second calculating unit 2540b. Meanwhile, the first and second control units 2500a and 2500b may be implemented in different integrated circuits (ICs), respectively. Thus, two integrated circuits may be required to process the outputs of the first and second pressure sensors 2300, 2400. However, the first and second control units 2500a and 2500b may be implemented in one integrated circuit (IC), respectively. The configurations and functions of the first and second control units 2500a and 2500b are the same as those described with reference to FIG. 18 by dividing and processing outputs of the first and second pressure sensors 2300 and 2400, .

The electronic device may further include a touch sensor in addition to at least one of the first and second pressure sensors 2300 and 2400. In this case, the touch sensor may be driven by one controller 2500 as shown in FIG. That is, one controller 2500 can control at least one of the first and second pressure sensors 2300 and 2400 and the touch sensor 5000. In addition, when the touch sensor 5000 is further provided, as shown in FIG. 20, in addition to the first and second control units 2500a and 2500b for controlling the first and second pressure sensors 2300 and 2400, A control unit 2500c may be further provided. That is, a plurality of control units may be provided to control the first and second pressure sensors 2300 and 2400 and the touch sensor 5000, respectively.

21 is a block diagram for explaining a data processing method of a pressure sensor according to another embodiment of the present invention.

As shown in FIG. 21, a first control unit 2600, a storage unit 2700, and a second control unit 2800 may be included to process data of the pressure sensor according to another embodiment of the present invention. Such a configuration may be configured in the same IC or in another IC. In the data processing of the present invention, the first control unit 2600 and the second control unit 2800 may be interlocked. Here, the first and second control units 2600 and 2800 may be for processing data of the pressure sensor, respectively. In addition, any one of the first and second control units 2600 and 2800 (e.g., the first control unit) is a control unit for controlling the touch sensor, and the other (for example, the second control unit) . In this case, the control unit for controlling the touch sensor can control the pressure sensor simultaneously with the control of the touch sensor. The storage unit 2700 serves as a data movement path of the first control unit 2600 and the second control unit 2800 and also stores data of the first and second control units 2600 and 2800.

As shown in FIG. 21, the first controller 2600 scans the pressure sensor and stores raw data of the pressure sensor in the storage unit 2700. The second control unit 2800 receives data from the storage unit 2700, processes the pressure sensor data, and stores the resultant value in the storage unit 2700. The result value stored in the storage unit 2700 may include data such as a Z-axis, a state, and the like. The first control unit 2600 reads the result of the pressure sensor from the storage unit 2700, generates an interrupt upon occurrence of an event, and transmits the interrupt to the host.

10 to 12, the front input unit 1360 of the electronic device 1000 may be a fingerprint recognition sensor. The fingerprint recognition sensor may be a pressure sensor according to the present invention. FIG. 22 shows a configuration of a fingerprint recognition sensor using a pressure sensor according to the embodiments of the present invention. 23 is a sectional view of a pressure sensor according to another embodiment of the present invention.

22, a fingerprint recognition sensor using a pressure sensor according to embodiments of the present invention includes a pressure sensor 2300 and a fingerprint sensing unit 6000 electrically connected to the pressure sensor 2300 to detect a fingerprint can do. The fingerprint sensing unit 6000 may include a signal generating unit 6100, a signal sensing unit 6200, and a calculating unit 6300.

On the other hand, the pressure sensor 2300 may further include a protective layer 500 as a protective coating on the surface on which the finger is placed, as shown in FIG. The protective layer 500 can be made of urethane or another plastic that can act as a protective coating. The protective layer 500 is attached to the second electrode layer 200 using an adhesive. In addition, the pressure sensor 100 may further include a support layer 600 that may be used as a support within the pressure sensor 1000. The support layer 600 may be made of Teflon or the like. Of course, the support layer 600 may use other types of support materials instead of Teflon. The support layer 600 may be attached to the first electrode layer 100 using an adhesive. 5, the pressure sensor 1000 of the present invention may be provided such that the dielectric layer 300 is spaced apart by a predetermined distance in one direction and the other direction by a cutout 320 as shown in FIG. 5, The elastic layer 400 may be formed on the incision 3300 as shown in FIG. At this time, it is preferable that the elastic layer 400 is formed so that the respective vibrations do not affect each other.

The fingerprint sensing unit 6000 may be connected to the first and second electrodes 110 and 210 provided on the upper and lower portions of the dielectric layer 300 of the pressure sensor 2300, respectively. The fingerprint sensing unit 6000 can generate ultrasonic signals by applying a voltage having a resonance frequency of an ultrasonic band to the first and second electrodes 110 and 210 to vibrate the dielectric layer 300 at the upper and lower portions.

The signal generator 6100 is electrically connected to the plurality of first and second electrodes 110 and 210 included in the pressure sensor 2300 and applies an alternating voltage having a predetermined frequency to each electrode. The dielectric layer 300 of the pressure sensor 2300 is vibrated up and down by an AC voltage applied to the electrode, and an ultrasonic signal having a predetermined resonance frequency, for example, 10 MHz is emitted to the outside.

A specific object can be brought into contact with one surface of the pressure sensor 2300, for example, one surface of the protective layer 500. [ When the object contacting the one side of the protection layer 500 is a finger of a person including a fingerprint, the reflection of the ultrasound signal emitted by the pressure sensor 2300 along the minute valley and the ridge existing in the fingerprint The pattern is determined differently. Assuming that no object is in contact with the contact surface such as the one side of the protective layer 500, ultrasonic signals generated by the pressure sensor 2300 due to the difference in the medium between the contact surface and the air, It reflects without being able to come back. On the other hand, when a specific object including the fingerprint is brought into contact with the contact surface, a part of the ultrasonic signal generated by the pressure sensor 2300 which is in direct contact with the ridge of the fingerprint passes through the interface between the contact surface and the fingerprint, Only a part of the ultrasonic signal is reflected and returned. The intensity of the reflected ultrasonic signal can be determined according to the acoustic impedance of each material. In other words, the signal sensing unit 6200 measures the acoustic impedance difference generated by the ultrasonic signal in the valleys and ridges of the fingerprint from the pressure sensor 2300 so that the corresponding region is in contact with the ridge of the fingerprint It is possible to judge whether or not it is a sensor.

The operation unit 6300 analyzes a signal sensed by the signal sensing unit 6200 and calculates a fingerprint pattern. The pressure sensor 2300 having a low intensity of the reflected signal is a pressure sensor 2300 that is in contact with a ridge of the fingerprint and is almost identical to the intensity of the generated reflected signal Pressure sensor 2300 is a pressure sensor 2300 corresponding to the valley of the fingerprint. Therefore, the fingerprint pattern can be calculated from the difference in acoustic impedance detected in each region of the pressure sensor 2300. [

Meanwhile, the pressure sensor according to the embodiments of the present invention can be implemented as a composite device in combination with a haptic device, a piezoelectric buzzer, a piezoelectric speaker, an NFC, a WPC, and a Magnetic Static Transmission (MST). That is, the pressure sensor according to the embodiments of the present invention can be combined with a functional unit having a different function to realize a complex device. A composite device including the pressure sensor according to the present invention is shown in Figs. 24 to 26. Fig. Here, the pressure sensor 2300 may utilize any one of the various embodiments of the present invention described with reference to Figs. 1, 5, and 6.

As shown in Fig. 24, a piezoelectric element 7100 may be formed on a diaphragm 7200, and a pressure sensor 2300 may be provided on the diaphragm 7200 according to embodiments of the present invention. The piezoelectric element 7100 may be formed as a bimorph type in which a piezoelectric layer is formed on both surfaces of the substrate, or may be formed in a unimorph type in which a piezoelectric layer is formed on one surface of the substrate. In addition, electrodes may be formed on the upper and lower portions of the piezoelectric layer, respectively. That is, a plurality of piezoelectric layers and a plurality of electrodes are alternately stacked so that the piezoelectric element 7100 can be realized. Here, the piezoelectric layer can be formed using, for example, a piezoelectric material of PZT (Pb, Zr, Ti), NKN (Na, K, Nb), BNT (Bi, Na, Ti) The diaphragm 7200 is provided to have the same shape as the piezoelectric element 7100 and the pressure sensor 2300 and may be provided larger than the piezoelectric element 7100. [ The piezoelectric element 7100 may be bonded to the upper surface of the diaphragm 7200 with an adhesive. The diaphragm 7200 may be made of metal, polymer, or pulp-based material. For example, the diaphragm 7200 can be made of a resin film, and materials having a Young's modulus of 1 MPa to 10 GPa and a large loss coefficient such as an ethylene propylene rubber type or styrene butadiene rubber type can be used. The diaphragm 7200 amplifies the vibration of the piezoelectric element 7100.

The piezoelectric element 7100 provided between the diaphragm 7200 and the pressure sensor 2300 may be driven by a piezoelectric acoustic element or a piezoelectric vibration element in accordance with a signal applied through an electronic device, that is, an AC power source. That is, the piezoelectric element 7100 may be used as an actuator that generates a predetermined vibration according to an applied signal, that is, a haptic element, and may be used as a piezoelectric buzzer or a piezoelectric speaker for generating a predetermined sound.

On the other hand, the pressure sensor 2300 and the piezoelectric element 7100 may be bonded together with an adhesive or the like and may be formed integrally. When the pressure sensor 2300 and the piezoelectric element 7100 are integrally manufactured, the pressure sensor 2300 can have the structure described with reference to FIGS. 5 and 6. FIG. That is, a first electrode is formed on a portion where a plurality of piezoelectric layers and electrodes are repeatedly stacked, a dielectric layer 300 is formed on the first electrode, and a second electrode is formed on the dielectric layer. In this case, the first electrode may be patterned, and the dielectric layer 300 may be cut by a plurality of cut-out portions in a predetermined cell unit, and the second electrode may be patterned on the first electrode.

In addition, when the piezoelectric element 7100 is used as a piezoelectric buzzer or a piezoelectric speaker, it is preferable that a predetermined resonance space is provided between the piezoelectric element 7100 and the pressure sensor 2300. That is, as shown in FIG. 25, a support base 7300 having a predetermined thickness may be provided at the edge between the piezoelectric element 7100 and the pressure sensor 2300. The support 7300 can use a polymer. The size of the resonance space between the piezoelectric element 7100 and the pressure sensor 2300 can be adjusted according to the height of the support base 7300. [ The supporting base 7300 may be formed by forming an adhesive tape or the like along the edges of the piezoelectric element 7100 and the pressure sensor 2300. 26, a first support 7310 is formed at the edge between the piezoelectric element 7100 and the pressure sensor 2300, and also between the piezoelectric element 7100 and the diaphragm 7200, A predetermined resonance space may be provided.

In addition, the pressure sensors may be combined with NFC, WPC and MST, combined with each of them, or combined with at least two of them to implement a composite device. The NFC, the WPC, and the MST may be formed on a predetermined sheet in an antenna pattern of a predetermined shape. Of course, at least one of the piezoelectric speaker, the piezoelectric actuator, the WPC antenna, the NFC antenna, and the MST antenna including the pressure sensor may be manufactured as an integrated unit. Further, by implementing the multifunctional function as a single module, the area occupied by each function can be reduced compared with that of each function.

27 and 28 are an exploded perspective view and a combined perspective view of a composite device including an NFC and a WPC as an embodiment of a composite device having a pressure sensor according to the present invention. Of course, pressure sensors can be combined with NFC, WPC and MST, respectively, and these NFC, WPC and MST can be made with a predetermined antenna pattern.

27 and 28, a first sheet 8000 provided on one surface of the pressure sensor 1000 and having a first antenna pattern 8100 formed thereon, and a second sheet 8000 formed on the upper or lower surface of the first sheet 8000, And a second sheet 9000 having a second antenna pattern 9100 and a third antenna pattern 9200 formed thereon. The first antenna pattern 8100 of the first sheet 8000 and the second antenna pattern 9100 of the second sheet 9000 are connected to form a wireless power charging (WPC) antenna, The third antenna pattern 9200 of the sheet 9000 is formed outside the second antenna pattern 9100 to form a near field communication (NFC) antenna. That is, the composite device module according to the present invention may be provided by integrating a pressure sensor, a WPC antenna, and an NFC antenna.

The first sheet 8000 is provided on one side of the pressure sensor 2300 and the first antenna pattern 8100 is formed on the upper side. The first sheet 8000 includes first and second extraction patterns 8200a and 8200b connected to the first antenna pattern 8100 and led out to the outside and a third antenna pattern 8300 and 8330 connecting the first antenna pattern 9200 and the third and fourth extraction patterns 8400a and 8400b connected to the third antenna pattern 9200 and drawn out to the outside. The first sheet 8000 may be provided in the same shape as the pressure sensor 2300. That is, the first sheet 8000 may be provided in a substantially rectangular plate shape. At this time, the thickness of the first sheet 8000 may be equal to or different from the thickness of the pressure sensor 2300. The first antenna pattern 8100 may be formed in a predetermined number of turns by rotating the first sheet 8000 in one direction from the center of the first sheet 8000, for example. For example, the first antenna pattern 8100 may have a predetermined width and spacing, and may be formed in a spiral shape that rotates outward in a counterclockwise direction. At this time, the line width and the interval of the first antenna pattern 8100 may be the same or different. That is, the line width of the first antenna pattern 8100 may be larger than the interval. Also, the end of the first antenna pattern 8100 is connected to the first extraction pattern 8200a. The first drawing pattern 8200a is formed to have a predetermined width and is exposed to one side of the first sheet 8000. For example, the first drawing pattern 8200a is formed so as to extend in the long-side direction of the first sheet 8000 and to be exposed at one side of the first sheet 8000. [ Also, the second extraction pattern 8200b is formed in the same direction as the first extraction pattern 8200a apart from the first extraction pattern 8200a. The second extraction pattern 8200b is connected to the second antenna pattern 9100 formed on the second sheet 9000. [ Here, the second extraction pattern 8200b may be longer than the first extraction pattern 8200a. A plurality of connection patterns 8310, 8320, and 8330 are provided to connect the third antenna pattern 9200 formed on the second sheet 9000. That is, the third antenna pattern 9200 is formed in a semicircular shape in which at least two regions are broken. A plurality of connection patterns 8210, 8220, and 8230 are formed on the first sheet 8000 to connect the semi- do. The connecting pattern 8210 is formed in a region between the first drawing patterns 8200a with a predetermined width and length in one direction. The connection patterns 8220 and 8230 are formed on the other side where the first and second extraction patterns 8200a and 8200b are not formed at a position opposed to the connection pattern 8210 in the long side direction, And is formed with a predetermined width and length along the other short side direction. Further, the connection patterns 8220 and 8230 are formed to be spaced apart from each other. In addition, the third and fourth lead patterns 8400a and 8400b are formed apart from the second lead pattern 8200b and are formed to be exposed at one side. On the other hand, through holes 8500a and 8500b are formed in regions where the one side drawing patterns 8200 and 8400 formed with the drawing patterns 8200 and 8400 are not formed, respectively. Also, the drawing patterns 8200 and 8400 are connected to a connection terminal (not shown) and can be connected to the electronic device through the connection terminal (not shown). Meanwhile, the first sheet 8000 may be made of magnetic ceramic. For example, the first sheet 8000 can be formed using NiZnCu or NiZn magnetic material. Specifically, NiZnCu-based magnetic sheet there is _{Fe 2 O 3, ZnO, NiO} , CuO may be mixed as a magnetic _{material, Fe 2 O 3, ZnO,} NiO and CuO of 5: 2: 2 can be mixed in the ratio of 1 have. The first sheet 8000 is made of a magnetic ceramic, thereby shielding electromagnetic waves generated from the WPC antenna and the NFC antenna or absorbing electromagnetic waves, thereby suppressing interference of electromagnetic waves.

The second sheet 9000 is provided on the first sheet 8000 and the second antenna pattern 9100 and the third antenna pattern 9200 are formed apart from each other. Further, a plurality of holes 9310, 9320, 9330, 9340, 9350, 9360, 9370, 9380 are formed in the second sheet 9000. The second sheet 9000 may be provided in the same shape as the pressure sensor 2300 and the first sheet 8000. That is, the second sheet 9000 may be provided in a substantially rectangular plate shape. At this time, the thickness of the second sheet 9000 may be equal to or different from the thickness of the pressure sensor 2300 and the first sheet 8000. That is, the second sheet 9000 may be thinner than the pressure sensor 2300 and provided with the same thickness as the first sheet 8000. The second antenna pattern 9100 may be formed in a predetermined number of turns by rotating in one direction from the center portion of the second sheet 9000, for example. For example, the second antenna pattern 9100 has a predetermined width and spacing, and may be formed in a spiral shape that rotates clockwise outward. That is, a second drawing pattern 8200b formed on the first sheet 8000 is formed in a spiral shape starting from the same area as the first antenna pattern 8100 formed on the first sheet 8000 and rotating in the clockwise direction, And overlapping regions can be formed. In this case, the line width and interval of the second antenna pattern 9100 may be the same as the line width and the interval of the first antenna pattern 8100, and the second antenna pattern 9100 and the first antenna pattern 9100 may overlap have. Holes 9310 and 9320 are formed at the start and end points of the second antenna pattern 9100 and conductive materials are embedded in the holes 9310 and 9320. The starting point of the second antenna pattern 9100 is connected to the starting point of the first antenna pattern 8100 through the hole 9310 and the end point of the second antenna pattern 9100 is connected to the starting point of the second antenna pattern 9100 through the hole 9320, And is connected to a predetermined region of the pattern 8200b. The third antenna pattern 9200 is spaced apart from the second antenna pattern 9100 and is formed at a plurality of turns along the edge of the second sheet 9000. That is, the third antenna pattern 9200 is provided so as to surround the second antenna pattern 9100 from the outside. At this time, the third antenna pattern 9200 is formed in a shape that is broken at a predetermined region on the second sheet 9000. That is, the third antenna pattern 9200 may not be formed of a plurality of turns connected to each other, but may be formed in a shape that is cut off in at least two regions and is not electrically connected to each other on the second sheet 9000. A plurality of holes 9330, 9340, 9350, 9360, 9370, and 9380 are formed between the third antenna patterns 9200 that are cut off from each other. In addition, the plurality of holes 9330, 9340, 9350, 9360, 9370, 9380 are embedded with conductive material and connected to the connection patterns 8310, 8320, 8330 of the first sheet 8000, respectively. Accordingly, the third antenna pattern 9200 is formed in a state of being broken in at least two regions, but the connection patterns 8310, 8320, and 8320 of the plurality of holes 9330, 9350, 9360, 9370, and 9380 and the first sheet 8000, 8330, respectively. A plurality of through holes 9410 and 9420 are formed in the second sheet 9000 to expose the through holes 8500a and 8500b of the first sheet 8000 and the plurality of outgoing patterns 8200 and 8400, respectively . In addition, four through-holes 9420 are formed to expose a plurality of the first sheet 8000, that is, four outgoing patterns 8200 and 8400. Meanwhile, the second sheet 9000 may be made of a material different from that of the first sheet 8000. For example, the second sheet 9000 may be made of a non-magnetic ceramic and may be fabricated using a low temperature co-fired ceramic (LTCC).

The antenna patterns 8100, 9100, and 9200, the extraction patterns 8200 and 8400 and the connection patterns 8310, 8320 and 8330 are formed using a copper foil or a conductive paste. When the conductive patterns are formed using a conductive paste, The paste can be printed on a sheet by various printing methods. Examples of the conductive particles of the conductive paste include Au, Ag, Ni, Cu, Pd, Ag coated Cu, Ag coated Ni, Metal particles of Ni coated Cu and Ni coated graphite and carbon nanotubes, carbon black, graphite, silver coated graphite and the like can be used. have. The conductive paste is applied to a sheet by a method such as printing as a material in which conductive particles are uniformly dispersed in an organic binder having fluidity, and exhibits electrical conductivity by heat treatment such as drying, curing, firing and the like. As the printing method, roll-to-roll printing such as screen printing or flat printing such as gravure printing, inkjet printing, or the like can be used.

The present invention is not limited to the above-described embodiments, but may be embodied in various forms. In other words, the above-described embodiments are provided so that the disclosure of the present invention is complete, and those skilled in the art will fully understand the scope of the invention, and the scope of the present invention should be understood by the appended claims .

100: first electrode layer 200: second electrode layer
300: dielectric layer

Claims (20)

First and second electrode layers spaced apart from each other; And
And a dielectric layer provided between the first and second electrode layers,
Wherein the dielectric layer comprises a plurality of pores.
The pressure sensor according to claim 1, wherein the pores are formed in at least two sizes and at least one shape.
The pressure sensor of claim 2, wherein the dielectric layer has a porosity of 1% to 95%.
4. The pressure sensor according to claim 3, wherein the dielectric layer has a porosity or pore size different from that of at least one region.
The pressure sensor according to claim 1, wherein the dielectric layer has a pore cross sectional area ratio of a vertical cross section smaller than a pore cross sectional area ratio of a horizontal cross section. The pressure sensor according to claim 1, wherein the dielectric layer is formed to a thickness of 500 mu m or less.
The pressure sensor of claim 1, wherein the dielectric layer has a dielectric constant between 2 and 20.
The pressure sensor of claim 1, wherein the dielectric layer further comprises an electromagnetic shielding and absorbing material.
The pressure sensor according to claim 1, further comprising an insulating layer provided on at least one of the upper side of the first electrode layer, the first and second electrode layers, and the lower side of the second electrode layer.
The pressure sensor according to claim 1, further comprising first and second connection patterns provided on the first and second electrode layers and connected to each other.
A pressure sensor according to any one of claims 1 to 10,
And at least one functional part having a function different from that of the pressure sensor.
12. The composite device of claim 11, wherein the pressure sensor enables the function.
12. The apparatus of claim 11,
A piezoelectric element provided on one side of the pressure sensor; And
And a diaphragm provided on one side of the piezoelectric element.
14. The composite device according to claim 13, wherein the piezoelectric element is used as a piezoelectric vibrating device or a piezoelectric acoustic device in accordance with an applied signal.
[Claim 12] The composite device of claim 11, wherein the functional unit includes at least one of NFC, WPC, and MST, which is provided at one side of the pressure sensor and includes at least one antenna pattern.
12. The pressure sensor according to claim 11, wherein the function unit comprises a piezoelectric element provided on one surface of the pressure sensor, a diaphragm provided on one surface of the piezoelectric element, at least one of NFC, WPC and MST provided on one surface of the pressure sensor, Gt;
The composite device according to claim 11, further comprising a fingerprint sensing unit electrically connected to the pressure sensor and measuring a difference in acoustic impedance generated by an ultrasonic signal from the pressure sensor and a fingerprint on the floor of the fingerprint.
window;
A display unit for displaying an image through the window; And
And a pressure sensor for detecting a position and a pressure of a touch input applied through the window,
Wherein the pressure sensor comprises the pressure sensor according to any one of claims 1 to 10. The electronic apparatus according to claim 18, wherein the pressure sensor includes at least one of a first pressure sensor provided on the lower side of the display unit and at least one second pressure sensor provided below the window.
The electronic apparatus according to claim 18, further comprising a touch sensor provided between the window and the display section.

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