KR102279960B1 - Touch sensor module - Google Patents

Abstract

The present invention relates to a touch sensor module, wherein the touch sensor module is located on a spacer, an upper side of the spacer, a target part formed of a conductive material, and a lower side of the spacer, a first substrate and a first substrate from the first substrate The coils are arranged side by side in one direction, and the coils adjacent in the first direction include a coil part including a plurality of first coils wound in opposite directions, and as the distance between the target part and the coil part changes, the The inductance of the target part and the coil part changes, and the touch sensor module detects the change of the inductance.

Description

Touch sensor module {TOUCH SENSOR MODULE}

The present invention relates to a touch sensor module.

In general, a touch panel for outputting various operating states and inputting commands such as commands by a touch operation is provided to portable electronic devices such as smart phones and MP3 devices or home appliances such as refrigerators. is attached.

Accordingly, the touch panel may include only a touch sensor module for recognizing a user's touch operation, or a display device module for visually outputting information as well as the touch sensor module may be combined together.

In this case, the display module used in the touch panel is typically an OLED (organic light emitting diode) display device, particularly an active matrix organic light emitting diode (AMOLED) or a liquid crystal display (liquid crystal display). do.

In addition, the touch sensor module uses a two-dimensional touch sensing method that detects a touch point using the coordinates of the X and Y axes, as well as a three-dimensional touch sensing method that additionally detects the intensity of the touch applied in the Z-axis direction, which is the pressing direction. is becoming

For such a three-dimensional touch sensing method, conventionally, although the intensity of a touch is sensed using a pressure sensor or an image sensor, there is a problem in that a change in the touch intensity cannot be accurately detected.

Also, depending on the installation position of the sensor for detecting the touch, there is a problem in that it is not possible to accurately detect whether the touch has been made.

Republic of Korea Patent No. 10-1777733 (Registration Date: September 06, 2017, Title of Invention: 3D Touch Device Using Image Sensor and Opaque Member)

The problem to be solved by the present invention is to improve the touch sensitivity of the touch sensor module.

A touch sensor module according to one aspect of the present invention for solving the above problems is a spacer, located on an upper side of the spacer, a target portion formed of a conductive material and a lower side of the spacer, a first substrate and the first substrate are arranged side by side in the first direction, and the coils adjacent in the first direction include a coil part including a plurality of first coils wound in opposite directions, and the distance between the target part and the coil part is changed. Accordingly, the inductance of the target part and the coil part changes, and the touch sensor module detects a change in the inductance.

The plurality of first coils may be positioned on at least one of an upper surface and a lower surface of the first substrate.

A winding direction of each first coil positioned on the same surface of the first substrate may be opposite to a winding direction of an adjacent first coil.

When the plurality of first coils are positioned on the upper and lower surfaces of the first substrate, windings of the first coils facing each other in a second direction orthogonal to the first direction with respect to the first substrate as a center The directions may be the same as each other.

The touch sensor module according to the above feature is stacked on the coil unit in a second direction orthogonal to the first direction on the lower side of the spacer, and is arranged side by side in the second substrate and the second substrate in the first direction It may further include an additional coil unit having a plurality of second coils.

A winding direction of the additional coil unit may be the same as a winding direction of the coil unit.

The plurality of second coils may be positioned on at least one of an upper surface and a lower surface of the second substrate.

A winding direction of a second coil positioned on the same surface of the second substrate may be opposite to a winding direction of an adjacent second coil.

When the plurality of second coils are positioned on the upper and lower surfaces of the second substrate, windings of the second coils facing each other in a second direction orthogonal to the first direction with respect to the second substrate as a center The directions may be the same as each other.

The target part may be a metal plate.

The touch sensor module according to the above feature may further include an electromagnetic shielding film positioned below the target part.

The target unit may include a second substrate and a plurality of second coils arranged side by side in the first direction on the second substrate.

The plurality of second coils may be positioned on at least one of an upper surface and a lower surface of the second substrate.

A winding direction of a second coil positioned on the same surface of the second substrate may be opposite to a winding direction of an adjacent second coil.

When the plurality of second coils are positioned on the upper and lower surfaces of the second substrate, windings of the second coils facing each other in a second direction orthogonal to the first direction with respect to the second substrate as a center The directions may be the same as each other.

Each of the second coils may be positioned to face each of the first coils in a second direction orthogonal to the first direction.

The touch sensor module according to the above feature may further include an electromagnetic shielding film positioned on at least one of an upper portion of the target portion and a lower portion of the coil portion.

The spacer may be formed in the form of a flat plate positioned between the target part and the coil part.

The spacer may be made of polyethylene, polyurethane, or polyolefin.

According to this feature, the total number of windings of the coil formed in the touch sensor module is easily increased by stacking a plurality of coil units.

Accordingly, the range of change in inductance generated in the touch sensor module is increased, and thus the sensitivity of the touch sensor module is improved.

In addition, instead of using a separate plate-shaped target metal, coil units facing each other are used to cause an inductance change according to the touch operation to sense the touch operation.

For this reason, since the number of coil windings of the two coil portions facing each other is increased to increase the amount of inductance generated, the sensitivity of the touch sensor module is increased.

In addition, since a separate target metal is not required, the touch sensor module can be mounted at a desired location without difficulty in mounting the touch sensor module, thereby increasing the degree of freedom in designing the product having the touch sensor module.

1 is a conceptual cross-sectional view of a touch sensor module according to an embodiment of the present invention.
FIG. 2 is a diagram schematically illustrating an example in which a coil unit is formed on a substrate on a substrate in the touch sensor module shown in FIG. 1 .
3 is a conceptual cross-sectional view of a touch sensor module according to another embodiment of the present invention.
FIG. 4 is a diagram schematically illustrating an example in which an upper coil unit and a lower coil unit are respectively formed on a first substrate and a second substrate in the touch sensor module shown in FIG. 3 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, for techniques or configurations already known in the art,

If it is determined that adding a detailed description may obscure the gist of the present invention, a part thereof will be omitted from the detailed description. In addition, the terms used in this specification are terms used to properly express the embodiments of the present invention, which may vary according to a person or custom in the relevant field. Accordingly, definitions of these terms should be made based on the content throughout this specification.

The terminology used herein is for the purpose of referring to specific embodiments only, and is not intended to limit the invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of 'comprising' specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

Hereinafter, a touch sensor module according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, a touch sensor module according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 .

1 is a conceptual cross-sectional view of a touch sensor module according to an embodiment of the present invention. FIG. 2 is a diagram schematically illustrating an example in which a coil unit is formed on a substrate on a substrate in the touch sensor module shown in FIG. 1 .

As shown in FIG. 1 , the touch sensor module 1 of this example includes at least a target part 10 , a spacer 20 positioned under the target part 10 , and at least a spacer 20 positioned under the spacer 20 . One coil part 301 , 302 , a first adhesive layer 401 positioned between the spacer 20 of the target part 10 , and a second adhesive layer positioned between the spacer 20 and the coil part 301 . (402) is provided.

The target part 10 is a touch object on which a touch operation is performed with a touch tool such as a finger in the touch sensor module 1, and a plate-shaped housing covering the upper portion of the touch sensor module 1 (eg, the touch sensor module ( 1) a housing of a product equipped with].

The target part 10 is made of a conductive material such as a metal to generate inductance with the at least one coil part 301 and 302 , and thus the target part 10 may be a metal plate.

The spacer 20 is for spacing the distance between the target part 10 and the coil part 301 , and the target part 10 and the coil part 301 are spaced apart by the thickness of the spacer 20 .

The spacer 20 is made of a flat plate shape that is located entirely between the target portion 10 located on the upper portion and the coil portion 301 located on the lower portion, and is spaced between the target portion 10 and the coil portion 301 . make it

At this time, the first adhesive layer 401 and the second adhesive layer 402 are coated on the entire upper portion and the lower portion of the spacer 20 , respectively.

Accordingly, the target portion 10 and the coil portion 301 adjacent to the spacer 20 are safely positioned on the upper surface and the lower surface of the spacer 20 , respectively, and the spacer 20 is the target portion 10 . ) is located between the entire lower surface of the coil unit 301 and the entire upper surface of the coil unit 301 .

The spacer 20 is made of a material having elasticity excellent in restoring force and compressibility, for example, polyethylene or polyurethane, polyolefin, etc., and may have a waterproof and dustproof function. .

As such, since the spacer 20 is formed in a plate shape, the target portion 10 positioned on the upper portion of the spacer 20 does not have a bending phenomenon when a touch operation is not performed by the support operation by the spacer 20 . Keep the initial state stable. Accordingly, the reliability of the operation of the touch sensor module 1 is improved and the lifespan of the touch sensor module 1 is extended.

As such, the air gap, which is the distance between the target part 10 and the coil part 301 facing from opposite sides with the spacer 20 interposed therebetween, is the user's It varies according to a touch operation, and the magnitude of the inductance generated between the target unit 10 and the coil units 301 and 302 varies according to the change in the distance.

At least one coil unit 301 , 302 positioned below the spacer 20 has the same configuration.

As an example in FIG. 1 , the two coil units 301 and 302 are sequentially stacked along the vertical direction of the touch sensor module 1 , but the present invention is not limited thereto, and only one coil unit 301 exists or three The above coil units may be sequentially stacked in the vertical direction.

In this case, when the plurality of coil units 301 and 302 are sequentially stacked, an adhesive layer for bonding the separate coil units to each other may exist between the two adjacent coil units 301 and 302 .

The coil units 301 and 302 are located on the upper and lower surfaces of the substrates 11 and 21 made of a single-sided printed circuit board, a double-sided printed circuit board, or a multilayer printed circuit board, respectively, and the corresponding substrates 11 and 21, respectively. and a coil (121-124, 131-134, 221-224, 231-234).

The upper coils 121-124 and 221-224 positioned on the upper surface of each of the substrates 11 and 21 are disposed along the left-right direction (ie, the extension direction) (eg, the first direction) of the substrates 11 and 21 . The lower coils 131-131 and 231-234 positioned on the lower surface of each of the substrates 11 and 21 are also spaced apart from each other in parallel to the lower surface along the extending direction of the substrates 11 and 21. It is very arranged.

At this time, one upper coil 121-124 and one lower coil 131-134 correspond to each other at positions corresponding to the vertical direction (eg, the second direction) with the corresponding substrates 11 and 21 interposed therebetween. Located. The first direction, which is the left-right direction, and the up-down direction, the second direction cross each other, and more specifically, are orthogonal.

As shown in FIG. 2 , a plurality of upper coils 121-124 and lower coils 131-134 positioned on a corresponding substrate (eg, the first substrate 11) have a conductive pattern such as a single conductive wire or copper pattern. Two coils (eg, 121, 121, 121, 131), the winding directions are the same.

As in this example, when two or more coil parts 301 and 302 are sequentially stacked in the vertical direction of the touch sensor module 1, all the coil parts 301, 303) is formed.

Also at this time, the winding directions of the plurality of upper coils 121-124 and 221-224 and the lower coils 131-134 and 231-234 positioned on the same axis of each of the substrates 11 and 21 along the vertical direction are also All are the same.

When the touch sensor module 1 includes two or more coil units 301 and 302 , the substrates 11 and 21 on which the respective coil units 301 and 302 are positioned may be separate substrates separated from each other. .

As an example, referring to FIG. 2 , on the upper and lower surfaces of the first substrate 11 , four upper coils 121 along the left and right sides from one edge (eg, left edge) to the other edge (eg, right edge) -124) and the process in which the four lower coils 131-134 are formed will be described.

The conductive pattern L11 located at the outermost (eg, the leftmost side) is wound in a predetermined shape such as a circle or a rectangle in the first winding direction (eg, clockwise) from the outside to the center on the upper surface of the first substrate 11 . After the first upper coil 121 is formed, the conductive pattern L11 moves from the center of the first upper coil 121 to the lower surface of the first substrate 11 through a via hole or the like. .

Then, the conductive pattern L11 is again wound in a predetermined shape from the corresponding lower surface of the first substrate 11 to form the first lower coil 131 .

Next, the corresponding conductive pattern L11 extends in the right direction, which is the extension direction of the lower surface of the first substrate 11 , and then in the second winding direction opposite to the winding direction of the adjacent first lower coil 131 ( For example, counterclockwise direction) is wound from the outside to the middle part of the first substrate 11 to form the second lower coil 132 , and then through a via hole or the like in the middle part of the second lower coil 132 . It extends to the upper surface of the first substrate 11 .

Then, the conductive pattern L11 is again wound counterclockwise from the center of the upper surface of the first substrate 11 to complete the second upper coil 122 , and again the conductive pattern L11 is the first After extending in the extending direction of the upper surface of the substrate 11 , they correspond to the upper and lower surfaces of the first substrate 11 in the same manner as in the method of forming the first upper coil 121 and the first lower coil 131 . A third upper coil 123 and a second lower coil 133 are formed.

Then, after the conductive pattern L11 moves to the lower surface of the substrate 11 again, the fourth lower coil 134 and the fourth upper coil 124 are applied to the lower and upper surfaces of the substrate 11 . By forming the first coil unit 301 is manufactured.

Accordingly, the inductance sensor 500 is connected to both ends of the conductive pattern, and an electric signal of a corresponding size is output according to the inductance, so that the touch can be determined.

When the second coil unit 302 is positioned on the first coil unit 301 , the plurality of upper coils 22 and the plurality of upper coils 22 and the plurality of upper coils 22 are formed on the second substrate 21 in the same manner as in the manufacturing method of the first coil unit 301 . After the lower coil 23 is formed, the second coil part 302 is positioned under the first coil part 301 , and the conductive pattern L11 positioned on the first coil part 301 and the second nose At least one of the conductive patterns positioned on the portion 302 is extended to make an electrical and physical connection to each other.

As such, the plurality of coils 121-124, 131-134, 221-224, 231-234 positioned on the first substrate 11 and the second substrate 21 are seamlessly connected to one conductive wire or conductive pattern ( L11).

At this time, since the coils 121-124, 131-134, 221-224, 231-234 formed on the corresponding substrates 11 and 21 are formed in the form of a pattern on the corresponding substrates 11 and 21 using a printed circuit technology. , The number of coils 121-124, 131-134, 221-224, 231-234 formed on each of the substrates 11 and 21 and the number of windings can be conveniently changed according to the needs of the user, and An increase in the size and weight of the touch sensor module 1 does not occur significantly.

In addition, when a plurality of coils are formed on one substrate 11 and 21 having a generally rectangular planar shape, the number of coil windings is limited due to size limitation of at least one of a horizontal width and a vertical width.

However, the total number of windings of the touch sensor module 1 can be easily increased by arranging separate substrates on which a plurality of coils are located in succession in the vertical direction.

For this reason, the sensitivity of the touch sensor module 1 and the reliability of the operation are easily improved.

In this way, the upper and lower surfaces of the substrates 11 and 21 on which the upper coils 121-124 and 221-224 and the lower coils 131-134 and 231-234 are located are coated with epoxy, etc. Molded parts 14 and 24 may be positioned.

In this case, since the coils 121-124, 131-134, 221-224, 231-234 are completely embedded in the molding parts 14 and 24, they are safely and securely placed on the corresponding substrates 11 and 21. Coils 121-124, 131-134, 221-224, and 231-234 are positioned.

As such, compared to the comparative example in which one coil is formed on one substrate, a plurality of coils are formed on one substrate having the same area as the substrate of the comparative example, so that the total number of coil windings and the length of the coil (that is, the length), greatly increasing the magnitude of the generated magnetic field.

Due to the increase in the magnitude of the magnetic field, the magnitude of inductance generated in the plurality of first and second coil units 301 and 302 also increases, so the variation width (Δinductance) of inductance generated in the touch sensor module 1 is also increased. do. Accordingly, the touch sensitivity of the touch sensor module 1 is greatly increased.

In addition, the impedance is increased by the increase of the inductance to secure a level higher than the minimum voltage for frequency oscillation, so that the frequency oscillation of the touch sensor module 1 is stably output.

Referring to [Table 1] below, the range of change in inductance according to the change in the number of coil turns is examined.

At this time, in [Table 1] below, the number of substrates is two, and a predetermined number of coils are respectively located on the upper and lower surfaces of each substrate. In the first case, one coil is formed on the upper and lower surfaces of each substrate, and in the second case, four coils are respectively formed on the upper and lower surfaces of each substrate.

Total number of coil turns
(number of turns of coil × total number of coils) Air gap (mm) Inductance (uF) △ Inductance
(Distance 0.1~0.3mm) 3×4=12 0.1 0.45 0.3 0.2 0.62 0.3 0.75 6×16=96 0.1 1.92 1.08 0.2 2.53 0.3 3

As shown in [Table 1] above, when one coil is provided on the upper and lower surfaces of the first and second substrates, respectively, the total number of coils formed on both the first and second substrates is 4 The total number of coil windings formed on the first and second substrates becomes 12. In this case, as shown in [Table 1], the inductance change range was 0.3.

When four coils are formed in series on the upper and lower surfaces of the first and second substrates, respectively, and a total of 16 coils are formed on both the first and second substrates, the total number of coil windings is increased to 96. In this case, it can be seen that the change range of the inductance is greatly increased to 1.8.

As described above, as the number of turns of the total coil increases, the change in inductance increases, and thus the accuracy of the operation of the touch sensor module 1 increases.

Next, a touch sensor module 1a according to another embodiment of the present invention will be described with reference to FIGS. 3 and 4 .

3 is a conceptual cross-sectional view of a touch sensor module according to another embodiment of the present invention, and FIG. 4 is an upper coil part and a lower coil part respectively formed on the first and second substrates in the touch sensor module shown in FIG. It is a drawing schematically showing an example.

Compared with FIG. 1 , components having the same structure and performing the same function are given the same reference numerals as in FIG. 1 , and detailed description thereof will be omitted.

As shown in Figure 3, the touch sensor module (1a) is a target part 10, the target part 10, the upper coil part 10a positioned below the target part 10, the upper coil part 10a, the touch object is positioned below the interval The material 20, at least one lower coil part 30a positioned below the spacer 20, and first and second adhesive layers 401 and 403 positioned on the upper and lower surfaces of the spacer 20, respectively , a first electromagnetic shielding film 501 positioned between the target part 10 and the upper coil part 10a, a second electromagnetic shielding film 502 positioned below the lower coil part 30a, and a first electromagnetic shielding film 501 and a third adhesive layer 601 positioned between the upper coil part 10a and a second adhesive layer 602 positioned between the lower coil part 30ㅁ and the second electromagnetic shielding film 502 .

Compared with the touch center module 1 shown in FIG. 1, the touch sensor module 1a of this example is located above the spacer 20 and faces the lower coil part 30a and the upper coil part ( 10a) and first and second electromagnetic shielding films 501 and 502 respectively positioned above the upper coil unit 10a and below the lower coil unit 30a are further provided.

Also, similar to the touch sensor module 1a of FIG. 1 , adhesive layers 401 , 402 , 601 , and 602 are provided for bonding between adjacent components.

At this time, since the upper coil part 10a located on the upper side of the upper coil part 10a and the lower coil part 30a is located more adjacent to the outer side, a pressure is applied during a user's touch operation. For this reason, the upper coil part 10a located above the upper coil part 10a and the lower coil part 30a functions as a target metal affected by the user's touch operation, and the upper coil part 10a ) together with the target part.

Due to this, the degree of bending of the substrate 11a is changed according to the degree of the physical force applied from the outside on the substrate 11a of the upper coil unit 10a, and when the applied physical force is removed, the spacer 20 is The upper coil portion 10a is restored to its initial state by elasticity.

In a state in which AC power is applied to each coil of the upper coil unit 10a and the lower coil unit 30a connected by a single conductive wire or conductive pattern, and a magnetic field is formed in the upper coil unit 10a and the lower coil unit 30a. , occurs between the upper coil part 10a and the lower coil part 30a when the distance between the upper coil part 10a and the lower coil part 30a corresponding to each other changes according to a change in the position of the upper coil part 10a. The magnitude of the inductance will change. As described above, the change in inductance according to the change in the distance between the upper coil unit 10a and the lower coil unit 30a corresponding to each other is detected by the inductance sensor.

For this reason, the inductance sensor detects the degree of force applied to the upper coil part 10a, that is, the degree of pressing in the Z-axis direction, by using the detected inductance size to detect whether the touch sensor module 1a is touched. will do

As already described, the winding directions of the coils 121a-124a and 131a-134a located in the upper coil unit 10a are the same, and all coils 221-224a and 231a- located in the lower coil unit 30a are the same. 234a) winding direction is also the same.

In addition, the coil winding direction of the upper coil unit 10a and the coil winding direction of the lower coil unit 30a are the same.

Next, an example of forming the upper coil part 10a and the lower coil part 30a will be described with reference to FIG. 4 .

As shown in FIG. 4 , the upper coil part 10a and the lower coil part 30a are respectively arranged in the same shape as shown in FIG. 2 .

That is, the winding directions of the coils adjacent to each other in the first direction on the same substrates 11a and 21a are opposite to each other, and the winding directions of the coils facing each other with the respective substrates 11a and 21a interposed therebetween are the same.

In addition, the winding directions of all coils corresponding to each other by being positioned on the same axis with the spacer 20 therebetween are the same.

Accordingly, the conductive pattern L21 located on the leftmost side to form the upper coil portion 10a is wound in a shape determined from the outer side to the middle portion on the upper surface of the first substrate 11a to form the first coil of the first upper coil. After forming the 121a, the conductive pattern L21 moves to the lower surface of the first substrate 11a through a via hole or the like in the center of the corresponding coil 121a.

Then, the conductive pattern L21 is again wound in a predetermined shape from the corresponding lower surface of the first substrate 11a to form the first coil 131a of the first lower coil.

Next, the corresponding conductive pattern L21 extends in the right direction, which is the extension direction of the lower surface of the first substrate 11a, and is then wound to the middle portion of the first substrate 11a according to a predetermined shape to form the lower coil of the first substrate 11a. After the second coil 132a is formed, it extends to the upper surface of the first substrate 11a through a via hole or the like.

Then, the conductive pattern L21 is wound outwardly toward the center of the upper surface of the first substrate 11a to form the second coil 122a of the first upper coil.

After the conductive pattern L21 extends in the extending direction of the upper surface of the first substrate 11a again, the method of forming the first coil 121a of the first upper coil and the first coil 131a of the first lower coil The third coil 123a of the first upper coil and the third coil 133a of the first lower coil are formed on the upper and lower surfaces of the first substrate 11a in the same manner as in FIG.

Finally, after the conductive pattern L21 moves in the extending direction of the lower surface of the first substrate 11a, the second coil 132a of the first lower coil and the second coil 122a of the first upper coil The fourth coil 134a of the first lower coil and the fourth coil 124a of the first upper coil are formed on the lower and upper surfaces of the first substrate 11a in the same manner as in the forming method, thereby forming the upper coil portion 10a. is completed

As described above, the formation of the plurality of first upper coils 121a to 124a and the first lower coils 131a to 134a spaced apart from the same substrate 11a along the extending direction of the substrate 11a is the conductive pattern L21. ) may be made by moving the upper and lower surfaces of the substrate 11a.

Accordingly, all of the first upper coils 121a - 124a and the first lower coils 131a - 134a positioned on the first substrate 11a are formed of a single conductive wire or conductive pattern L11 that is seamlessly connected.

In addition, since the winding directions of the first upper coil 121a-124a and the first lower coil 131a-134a are the same, current is applied to the conductive wire or the conductive pattern L21 for the operation of the touch sensor module 1a. When it becomes, the direction of the current flowing in all the coils 121a-124a, 131a-134a of the upper coil part 10a is also the same,

To form the lower coil unit 30a, a corresponding conductive pattern L31 is formed on the substrate 21a in a desired winding direction and shape in the same manner as the upper coil unit 10a, and the second upper coil 221a- 224a) and second lower coils 231a-234a are formed.

Then, the spacer 20 is positioned between the upper coil part 10a and the formed lower coil part 30a. Then, conductive patterns are applied to the upper coil unit 10a and the lower coil unit 30a, respectively, using at least one of the first substrate 11a and the second substrate 21a and a via hole passing through the spacer 20 , respectively. One end of (L21, L31) is connected to each other, and an inductance sensor is connected to the other end of the conductive patterns (L21, L31) that are not connected to each other, thereby completing the upper coil part 10a and the lower coil part 30a.

As already described with reference to FIG. 1 , the number of windings of each of the coils 121a-124a, 131-134a, 221-224a, and 231a-234a formed in the upper coil unit 10a and the lower coil unit 30a is adjusted. Accordingly, the magnitude of the magnetic field generated by the upper coil unit 10a and the lower coil unit 30a may be increased. Accordingly, the amount of change in inductance is greatly increased according to a change in the interval between the upper coil part 10a and the lower coil part 30a, and thus the sensitivity of the touch sensor module 1a is improved.

Also, in this example, in a state in which an alternating current is applied to the upper coil unit 10a and the lower coil unit 30a adjacent to each other facing each other in opposite directions, the distance between the upper coil unit 10a and the lower coil unit 30a is As the interval decreases, the generated frequency decreases, but the generated inductance increases, and as the interval between the upper coil unit 10a and the lower coil unit 30a increases, the generated inductance decreases.

The first electromagnetic shielding film 501 positioned on the upper coil part 10a and the second electromagnetic shielding film 502 positioned below the lower coil part 30a are each positioned above the upper coil part 10a of the target part ( 10) and a metal plate 700 such as a circuit board or a battery positioned under the lower coil unit 30a, and performs an electromagnetic shielding function, and may be formed in the form of a film.

In general, at least one of the upper coil unit 10a and the lower coil unit 30a includes a member in which eddy current is generated by the operation of the upper and lower coil units 10a and 30a, such as the metal plates 10 and 700 . When this is done, the inductance generated in the coils 12, 13, 22, and 23 is affected by being positioned in the corresponding coil units 10a and 30a.

Therefore, when an eddy current is generated in a member other than a component for sensing a user's touch operation, the inductance generated in the coil is reduced regardless of the user's touch operation, so that the inductance sensor does not detect an accurate touch state, Reduce the sensitivity of the touch sensor module.

However, in this example, since the first and second electromagnetic shielding films 501 and 502 are present between the corresponding metal plates 10 and 700 and the upper and lower coil units 10a and 30a, By suppressing the generation of eddy currents, the operation of the upper and lower coil units 10a and 30a is not affected.

Therefore, in the inductance sensor of the touch sensor module 1a, the amount of change in inductance is accurately detected according to the degree of touch of the touch sensor module 1a without the influence of eddy currents generated in the metal plates 10 and 700 located on the upper or lower portions. The magnitude of the resulting inductance also does not decrease.

In an alternative example, when at least one of the metal plates 10 and 700 is omitted, the corresponding electromagnetic shielding films 501 and 502 may also be omitted.

It is natural that these electromagnetic shielding films 501 and 502 can also be applied to the touch sensor module 1 of FIG. 1 .

In this touch sensor module 1a, an upper coil part 10a and a lower coil part 30a are respectively located at the upper and lower parts with the spacer 20 as the center, and the upper coil part 10a and the lower coil part ( 30a) detects a user's touch operation performed on one of the above.

As such, since one of the upper coil part 10a and the lower coil part 30a (eg, the upper coil part 10a) functions as a target metal to which a user's touch operation is performed, the metal on the upper part of the touch sensor module 1a A separate target part 10 made of can be omitted. As such, when the target part 10 is omitted, the upper coil part 10a becomes a target part and functions as a target part.

Therefore, since a separate target metal is not required, it is much easier to secure an installation position for installing the touch sensor module 1a. In addition, since the material of a component that is made of metal like the outer case and adversely affects the electromagnetic operation of the product can be changed to a non-conductive material, the reliability of the operation of the product is improved and the weight of the product is realized.

In particular, in the case of a 5G antenna used in a smartphone, etc., there is a problem that the performance of the 5G antenna is greatly deteriorated due to a metallic material located in the vicinity.

However, in this example, since a separate target metal made of metal is unnecessary, the performance of the 5G antenna is not weakened. In addition, due to the electromagnetic shielding films 501 and 502 , noise generated by the operation of the antenna is prevented from adversely affecting the operation of the touch sensor module 1 .

In addition, in the case of a touch sensor module using an eddy current generated in the target metal according to a change in the distance between the target metal and the coil part (eg, 30a) located in the opposite direction of the target metal by having a separate target metal, the target metal and While the inductance generated decreases as the distance (ie, air gap) between the corresponding coil parts gets closer, as already described, in this example using the upper coil part 10a as the target metal, in this example, the upper coil part 10a As the distance between the and the lower coil part 30a increases, the inductance increases.

In the above, embodiments of the touch sensor module of the present invention have been described. The present invention is not limited to the above-described embodiments and the accompanying drawings, and various modifications and variations will be possible from the point of view of those of ordinary skill in the art to which the present invention pertains. Accordingly, the scope of the present invention should be defined not only by the claims of the present specification, but also by those claims and their equivalents.

1, 1a: touch sensor module 10, 10a: target part
20: spacer 11, 11a: first substrate
21, 21a: second substrate 121-124, 121a-124a: first upper coil
131-134, 131a-134a: first lower coil
221-224, 221a-224a: second upper coil
231-234, 231a-234a: second lower coil
10a: upper coil part 30a: lower coil part
401, 402, 601, 602: adhesive layer 501, 502: electromagnetic shielding film

Claims (19)

In the touch sensor module,
spacer;
a target portion positioned above the spacer and formed of a conductive material; and
The first substrate is located under the spacer, and is arranged side by side in a first direction on a first substrate and an upper surface and a lower surface of the first substrate, respectively, and is perpendicular to the first direction and the first direction of the substrate. A coil unit including a plurality of first coils positioned in a second direction opposite to each other with respect to the
including,
The winding directions of the two first coils adjacent to each other in the first direction are opposite to each other, and the winding directions of the two first coils facing each other in the second direction are the same,
The outer ends of the two first coils facing each other in the first direction are connected to each other,
an inner end of one of the two first coils facing each other in the second direction is connected to an inner end of the other first coil through a via hole of the first substrate,
The inductance of the target part and the coil part changes as the distance between the target part and the coil part changes, and the touch sensor module detects a change in the inductance.
touch sensor module. delete delete delete According to claim 1,
a plurality of second coils stacked on the coil unit in a second direction orthogonal to the first direction under the spacer, and arranged side by side in a second substrate and the second substrate in the first direction Additional coil unit provided
A touch sensor module further comprising a. 6. The method of claim 5,
The winding direction of the additional coil unit is the same as the winding direction of the coil unit. 6. The method of claim 5,
The plurality of second coils are located on at least one of an upper surface and a lower surface of the second substrate. 8. The method of claim 7,
A winding direction of a second coil positioned on the same surface of the second substrate is opposite to a winding direction of an adjacent second coil. 8. The method of claim 7,
When the plurality of second coils are positioned on the upper and lower surfaces of the second substrate, windings of the second coils facing each other in a second direction orthogonal to the first direction with respect to the second substrate as a center The orientation of the touch sensor modules is the same. 10. The method according to any one of claims 1 and 5 to 9,
The target part is a metal plate, the touch sensor module. 11. The method of claim 10,
An electromagnetic shielding film positioned below the target
A touch sensor module further comprising a. According to claim 1,
The target part is a touch sensor module having a second substrate, and a plurality of second coils arranged side by side in the first direction on the second substrate. 13. The method of claim 12,
The plurality of second coils are located on at least one of an upper surface and a lower surface of the second substrate. 14. The method of claim 13,
A winding direction of a second coil positioned on the same surface of the second substrate is opposite to a winding direction of an adjacent second coil. 15. The method according to claim 13 or 14,
When the plurality of second coils are positioned on the upper and lower surfaces of the second substrate, windings of the second coils facing each other in a second direction orthogonal to the first direction with respect to the second substrate as a center The orientation of the touch sensor modules is the same. 15. The method according to claim 13 or 14,
Each second coil is a touch sensor module facing each of the first coil along a second direction orthogonal to the first direction. According to claim 1,
An electromagnetic shielding film positioned on at least one of an upper portion of the target portion and a lower portion of the coil portion
A touch sensor module further comprising a. According to claim 1,
The spacer is a touch sensor module in the form of a flat plate positioned between the target portion and the coil portion. 19. The method of claim 18,
The spacer is a touch sensor module made of polyethylene, polyurethane, or polyolefin.

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