KR102568841B1 - Touch Screen Panel And Display Device Employing The Same - Google Patents

Abstract

The present invention relates to an upper substrate and a lower substrate disposed apart from each other, a first electrode and a second electrode disposed between the upper substrate and the lower substrate, a dielectric layer disposed between the first electrode and the second electrode, and the upper substrate And a control unit disposed between the first electrode, including a conductive member having a preset pattern formed thereon, and detecting a user's touch based on a change in capacitance between the first electrode and the second electrode. can do.
According to the present invention, not only a two-dimensional touch but also the intensity of a touch due to pressure can be sensed even without an additional sensor device on the touch screen panel, so that a three-dimensional touch can be efficiently sensed. Therefore, there is an advantage of providing a touch screen panel with greatly improved touch performance to the user.

Description

Touch screen panel and display device including the same {Touch Screen Panel And Display Device Employing The Same}

The present invention relates to a touch screen panel and a display device including the same, and more particularly, a technology capable of sensing not only a touch according to a user's contact, but also a touch caused by pressure and the strength of the touch. It is an invention about

A touch screen panel allows a user to directly input a user's command on the screen by identifying the position when a part of the user's body touches (touches) a character or a specific location on the screen without using a keyboard. means a screen Since such a touch screen panel is provided with a display device and an input device integrally, it is widely used in portable display devices such as smart phones and tablet PCs, display devices in public facilities, and large display devices such as smart TVs.

The touch screen panel may be classified into a resistive type, a capacitive type, an infrared type, and an ultrasonic type according to a method of receiving a user's command.

A resistive touch screen panel provides a dielectric (insulator) between two electrically separated electrodes. When a part of the user's body is touched, pressure is generated, and the resistive films may come into contact with each other due to this pressure. A resistive touch screen panel detects a user's touch by detecting a change in electrical resistance between two electrodes due to contact between the resistive films.

A capacitive touch screen panel provides a dielectric (insulator) between two electrically separated electrodes. In addition, the capacitive touch screen panel senses a user's touch by detecting a change in capacitance between two electrodes caused by a user's body part being touched.

Since the capacitive touch panel detects the X and Y coordinates of the touch input point, it can detect the two-dimensional touch input location, but the strength of the touch input, for example, a strong touch and a weak touch Since they cannot be distinguished from each other, there is a limit to detecting a three-dimensional touch input.

Therefore, in recent years, a technology for detecting pressure by mounting a separate sensor has been developed as a technology for sensing pressure, but in this case, the problem of increasing the thickness due to the increased production cost due to the additional sensor and the complicated internal configuration is solved. existed.

Therefore, a new capacitive touch that can detect not only the change in capacitance according to the contact of the conductor, that is, a two-dimensional touch, but also the change in capacitance according to a change in the distance between electrodes, that is, a three-dimensional touch. The technology for the panel is required.

Therefore, the present invention is an invention devised to supplement the problems of the touch screen panel described above, and not only recognizes a location touched by a user by detecting a change in capacitance, but also measures both the touch by pressure and the strength of the touch. This is to provide a touch screen panel that can be sensed and a display device including the same.

A touch screen panel according to an embodiment of the present invention includes an upper substrate and a lower substrate spaced apart from each other, a first electrode and a second electrode disposed between the upper substrate and the lower substrate, and the first electrode and the second electrode. A dielectric layer disposed therebetween and a conductive member disposed between the upper substrate and the first electrode and having a predetermined pattern formed thereon, based on a change in capacitance between the first electrode and the second electrode A control unit for sensing a user's touch may be included.

Also, the conductive member may include a transparent conductive film.

In addition, the pattern (Pattern) may be formed corresponding to the resistance, structure or applied voltage of the first electrode and the second electrode.

Also, the controller may detect the magnitude of the user's touch pressure based on the change rate of the capacitance.

Also, the first transparent electrode may include a plurality of first conductive lines parallel to each other, and the second transparent electrode may include a plurality of second conductive lines perpendicular to the plurality of first conductive lines.

In addition, the present invention may further include an adhesive member disposed between the conductive member and the first substrate.

In addition, the adhesive member may include any one of an optically clear adhesive (OCA) and an optically clear resin (OCR).

In addition, the upper substrate and the lower substrate may include any one of tempered glass or a transparent film.

Another touch screen panel according to an embodiment of the present invention includes an upper substrate and a lower substrate spaced apart from each other, a first electrode and a second electrode disposed between the upper substrate and the lower substrate, and the first electrode and the first electrode. A dielectric layer disposed between two electrodes and a control unit for sensing a user's touch based on a change in capacitance between the first electrode and the second electrode, and the upper substrate includes a transparent conductive layer having a preset pattern formed thereon. electrodes may be included.

In addition, the pattern (Pattern) may be formed corresponding to the resistance, structure or applied voltage of the first electrode and the second electrode.

Also, the controller may detect the magnitude of the user's touch pressure based on the change rate of the capacitance.

Also, the first transparent electrode may include a plurality of first conductive lines parallel to each other, and the second transparent electrode may include a plurality of second conductive lines perpendicular to the plurality of first conductive lines.

In addition, the present invention may further include an adhesive member disposed between the conductive member and the first substrate.

In addition, the adhesive member may include any one of an optically clear adhesive (OCA) and an optically clear resin (OCR).

In addition, the upper substrate and the lower substrate may include any one of tempered glass or a transparent film.

In addition, the transparent conductive electrode becomes a ground electrode by applying a ground voltage, and the control unit can detect a user's touch using a distance between the transparent conductive electrode and the first electrode.

A display device according to an embodiment of the present invention includes a display panel for displaying information and a touch screen panel coupled to one side of the display panel, wherein the touch screen panel includes an upper substrate and a lower substrate spaced apart from each other and the upper substrate. A first electrode and a second electrode disposed between the substrate and the lower substrate, a dielectric layer disposed between the first electrode and the second electrode, and disposed between the upper substrate and the first electrode, and a preset pattern It may include a formed conductive member and a control unit that detects a user's touch based on a change in capacitance between the first electrode and the second electrode.

Also, the conductive member may include a transparent conductive film.

In addition, the conductive member may have a pattern formed based on the resistance, structure, or applied voltage of the first electrode and the second electrode.

Also, the controller may detect the magnitude of the touch pressure based on the change rate of the capacitance.

According to the present invention, it is possible to detect not only a two-dimensional touch but also the strength of a touch due to pressure without having an additional sensor device on the touch screen panel, so that a three-dimensional touch can be efficiently sensed. Therefore, there is an advantage of providing a touch screen panel with greatly improved touch performance to the user.

1 is a diagram showing the structure of a prior art touch screen panel.
2 is a diagram showing the structure of a touch screen panel according to an embodiment of the present invention.
3 is a cross-sectional view of a touch screen panel according to an embodiment of the present invention.
4 is a view showing a cross shape of a first electrode and a second electrode according to an embodiment of the present invention.
FIG. 5 (a) is a view of the touch screen panel prior to a user's touch, and FIG. 5 (b) is a view showing internal changes in the touch screen panel when a user applies a touch.
6 is a diagram illustrating internal changes of a touch screen panel when a user applies pressure after touching according to an embodiment of the present invention.
7 is a graph showing a change value of capacitance according to a user's touch intensity according to an embodiment of the present invention.
8 is a diagram showing pattern shapes of a first electrode and a second electrode according to an embodiment of the present invention.
9 is a diagram showing pattern shapes of a first electrode and a second electrode according to another embodiment of the present invention.
10 is a graph showing a change in capacitance of a conventional touch screen panel and a touch screen panel according to the present invention when a user applies pressure after touch.
11 is a diagram comparing effects of a conventional touch screen panel and a touch screen panel according to the present invention.
12 is a diagram showing various examples of a table device to which a touch screen panel is applied according to an embodiment of the present invention.
13 is a diagram showing various examples of a table device to which a touch screen panel is applied according to an embodiment of the present invention.

The configurations shown in the embodiments and drawings described in this specification are preferred examples of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings in this specification at the time of filing of the present application.

In addition, terms used in this specification are used to describe embodiments, and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as "include", "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or the existence or addition of more other features, numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

In addition, terms including ordinal numbers such as “first” and “second” used herein may be used to describe various components, but the components are not limited by the terms, and the terms It is used only for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The term "and/or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the present invention.

However, in the drawing, the thickness is enlarged and shown in order to clearly express the various layers and pixel regions of the present invention. When a part such as a layer, film, pixel region, plate, etc. is said to be "on" or "above" another part, this includes not only the case directly on the other part, but also the case where there is another part in between.

1 is a cross-sectional view of a conventional touch screen panel 10 for explaining problems of the conventional touch screen panel 10 according to the prior art.

Referring to FIG. 1, in the case of a conventional touch screen panel 10, an upper substrate 60 and a lower substrate 20 spaced apart from each other, and a first substrate disposed between the upper substrate 60 and the lower substrate 20 It includes an electrode 50 and a second electrode 30 and a dielectric layer 40 disposed between the first electrode 50 and the second electrode 30 .

The first electrode 50 and the second electrode 30 serve to transmit a driving signal or receive a detection signal, and constitute a capacitance C whose capacitance changes according to a user's touch.

In the case of the above conventional touch screen panel 10, as shown in FIG. 1, when a conductor such as a user's finger touches the upper substrate 60, between the first electrode 50 and the second electrode 30 It detects the change in capacitance and recognizes the user's touch based on this.

However, in the conventional touch screen panel 10, since the thickness of the dielectric layer 40 is thin, the change in capacitance according to the change in the distance between the first electrode 50 and the second electrode 30 cannot be accurately sensed. A problem arises in that the touch cannot be recognized. Accordingly, there is a disadvantage in that it is not possible to know how much the user touched the touch screen.

In addition, although not shown in the drawing, an optically clear adhesive (OCA) may be used as an adhesive member between the first electrode 50 and the second electrode 30 .

However, since these optically transparent adhesives generally have a dielectric constant of 3.0 or less at 100 khz, when a touch by pressure is applied, the change in capacitance according to the change in the distance between the two electrodes is very small, making it difficult to detect a three-dimensional touch. It was difficult.

In addition, when a user touches while wearing gloves to prevent cold or work, the change in capacitance according to the user's touch cannot be detected due to the insulating property of the glove, and of course, Since a change in capacitance cannot be detected, there is a problem in that it is not known how much the user touches with what strength.

Therefore, the present invention is an invention devised to solve this problem, by forming a conductive member, for example, a member having a conductive film or a conductive electrode on the lower part of the upper substrate, so that the touch screen panel is more sensitive to the user's touch and touch. It is designed to detect the intensity of pressure by The characteristics of the present invention will be described in detail through the following drawings.

2 is an exploded view showing the configuration of the touch screen panel 100 according to an embodiment of the present invention, FIG. 3 is a view showing a cross-section of the touch screen panel 100 shown in FIG. 2, 4 is a view showing the intersection of the first electrode 130 and the second electrode 150 according to an embodiment of the present invention.

The touch screen panel 100 is a device that displays an image and senses a user's touch, and may include a touch screen, a display driving circuit, a touch sensing circuit, a control circuit, and the like.

Referring to FIG. 2 , the touch screen panel 100 corresponding to the present invention is disposed between an upper substrate 110 and a lower substrate 160 spaced apart from each other and between the upper substrate 110 and the lower substrate 160. Between the first electrode 130 and the second electrode 150, the dielectric layer 140 disposed between the first electrode 130 and the second electrode 150, and between the upper substrate 110 and the first electrode 130 disposed and may include a conductive member 120 having a preset pattern formed thereon.

Also, the controller may detect a user's touch based on a change in capacitance between the first electrode 130 and the second electrode 150 .

The upper substrate 110 and the lower substrate 160 form the exterior of the touch screen 100 and are directly touched by the user at the same time, and are exposed to the outside to form the exterior of the touch screen panel 100 and the touch screen panel (100) to protect the internal structure.

The upper substrate 110 and the lower substrate 160 may be made of tempered glass or a transparent film.

Tempered glass can be strengthened by heating a molded sheet glass to 500 ° C. to 600 ° C. close to the softening temperature and rapidly cooling it by compressed cooling air, compressively deforming the glass surface and tensile straining the inside. Such tempered glass has 3 to 5 times higher bending strength and 3 to 8 times higher impact resistance than ordinary glass, and has excellent heat resistance.

The transparent film may use a synthetic resin of a transparent material, and has flexibility as well as transparency. Accordingly, when the upper substrate 110 and the lower substrate 160 are formed of transparent films, the touch screen panel 100 may be bent.

Such a transparent film may include a transparent and strong optical PET film (Polyethylene Terephthalate), a poly methyl methacrylate (PMMA) film, or a transparent polycarbonate (PC) film.

The first electrode 130 and the second electrode 150 are electrodes for sensing a user's touch input and may be disposed between the upper substrate 110 and the lower substrate 160 .

The first electrode 130 is an electrode for detecting a user's touch input position with respect to the Y-axis, and may extend in the X-axis direction. As shown in FIG. 1, the first electrode 130 may have a rectangular parallelepiped shape extending in the X-axis direction, but the shape of the first electrode 130 is not limited thereto and is disposed in various shapes extending in the X-axis direction. It can be.

The second electrode 150 is also an electrode for sensing a user's touch input and may be disposed on the lower substrate 160 .

The second electrode 150 is an electrode for detecting a user's touch input position with respect to the X axis, and may extend in the Y axis direction. Accordingly, the first electrode 130 and the second electrode 150 may cross each other.

As shown in FIG. 2 , the second electrode 150 may have a rectangular parallelepiped shape extending in the Y-axis direction, but the shape of the second electrode 150 is not limited thereto and may have various shapes extending in the Y-axis direction. there is.

The first electrode 130 and the second electrode 150 may be made of a transparent conductive material. For example, the first electrode 130 may be made of a transparent conductive material such as indium tin oxide (ITO), PEDOT:PSS, or silver-nanowire (AgNW).

In addition, the first electrode 130 and the second electrode 150 may be composed of a metal mesh. That is, the first electrode 130 and the second electrode 150 are composed of a metal mesh in which a metal material is disposed in a mesh shape, and may function as substantially transparent electrodes.

However, the constituent materials of the first electrode 130 and the second electrode 150 are not limited to the above examples, and various transparent conductive materials may be used as the constituent materials of the first electrode 130 and the second electrode 150. And in some embodiments, the first electrode 130 and the second electrode 150 may be made of the same material.

In addition, the first electrode 130 has a plurality of horizontal lines 130a, 130b, and 130c disposed toward the X-axis direction, and the second electrode 160 has a plurality of vertical lines disposed toward the Y-axis direction ( 150a, 150b, 150c). Accordingly, as shown in FIGS. 2 and 4 , the plurality of horizontal lines 130a, 130b, and 130c and the plurality of vertical lines 150a, 150b, and 150c may cross each other perpendicularly.

Therefore, as shown in FIG. 4 , the plurality of horizontal lines 130a, 130b, and 130c constituting the first electrode 130 and the plurality of vertical lines 150a, 150b, and 150c constituting the second electrode 150 Pixels (pix11 to pix33) may be formed in portions where they intersect each other.

For example, as shown in FIG. 4 , the 1-1 pixel is located where the first horizontal line 130a of the first electrode 130 and the first vertical line 150a of the second electrode 150 intersect. (pix11) is formed, and the first and second pixels (pix12) are formed at the position where the first horizontal line 130a of the first electrode 130 and the second vertical line 150b of the second electrode 150 intersect. can be formed

However, the arrangement of the first electrode 130 and the second electrode 150 is not always arranged in a rectangular shape as shown in FIGS. 2 to 4 and may be configured in various shapes such as a polygon, a circle, or an ellipse.

The dielectric layer 140 may be disposed between the upper substrate 110 and the lower substrate 160 , and more specifically, disposed between the first electrode 130 and the second electrode 150 . The dielectric layer 140 may include an anisotropic dielectric material having different relative permittivities depending on the arrangement direction.

Relative permittivity means the ratio of the permittivity of a medium to the permittivity of vacuum, and is also referred to as a dielectric constant. As the dielectric anisotropic material, titanium dioxide (TiO 2 ) or liquid crystal having a non-cubic crystal structure may be used. However, it is not necessarily limited thereto, and any dielectric anisotropic material having a non-cubic crystal structure may be used.

In addition, although not shown in the drawing, an adhesive member may be provided between the upper substrate 110 and the first electrode 130 or between the first electrode 130 and the second electrode 150 .

The adhesive member attaches the upper substrate 110 and the first electrode 130 using a double-sided adhesive such as Optically Clear Adhesive (OCA) or a liquid material such as Optically Clear Resin (OCR). After applying between the upper substrate 110 and the first electrode 130, it may be formed by irradiating ultraviolet (UV) light.

However, since such optically clear adhesive (OCA) generally has a permittivity of only 3.0 or less at 100 khz, when a touch by a user's pressure is applied, the change in capacitance according to the change in the distance between the two electrodes is very small, resulting in a three-dimensional jaw. There is a problem in that it is difficult to detect in-touch.

Therefore, in the conventional technology, a separate pressure sensor is placed on the upper substrate to recognize the pressure caused by the touch in order to solve this problem, but in this case, the production cost increases and the internal structure becomes complicated due to the mounting of the additional sensor.

Therefore, the present invention, as shown in FIGS. 2 and 3, arranges the conductive member 120 between the upper substrate 110 and the first electrode 130 to increase conductivity without mounting an additional sensor, thereby reducing the pressure caused by the touch. size was recognizable.

Specifically, the conductive member 120 may be composed of a transparent electrode film, and the transparent electrode film refers to a transparent plastic film capable of conducting electricity. It is thin and has good conductivity, so it is widely used in touch screen panels.

In general, the transparent electrode film is indium tin oxide (ITO) or indium zinc oxide, in which indium oxide is doped with tin oxide, but is not limited thereto, and may serve as a transparent electrode film. Any component present may be included in it.

Therefore, since the transparent electrode film having good electrical conductivity is disposed on the first electrode 130, it can sensitively respond to the touch of the user's hand through which electricity flows, and thus the capacitance change value can be accurately recognized. Hereinafter, the operation principle of the present invention will be described through FIGS. 5 and 6.

Figure 5 (a) shows the appearance of the touch screen panel 100 before a touch by the user, Figure 5 (b) shows the appearance of the touch screen panel 100 when there is a touch by the user, Figure 6 is the appearance of the touch screen panel 100 by the user It is a drawing showing the appearance of the touch screen panel 100 when pressure is applied after being touched by the user.

Referring to FIG. 5 , the control unit senses a value of capacitance formed between the first electrode 130 and the second electrode 150 according to a predetermined period.

As shown in (a) of FIG. 5 , before a user applies a touch, the value of the capacitance formed between the first electrode 130 and the second electrode 150 does not change and has a constant value. That is, since the strength of the electric field has not changed, the controller cannot detect any change.

However, in the case of (b) of FIG. 5 , when a touch input by a user occurs, an internal electric field is changed.

Looking at this in detail, since a person's finger is in an omnisciently grounded state, an electric field flows from the sub-electrode 130c of the first electrode to the user's finger at the point where the touch input is applied, as shown in the drawing.

That is, since the value of the capacitance formed between the first electrode 130 and the second electrode 150 changes due to the external electric field, the control unit detects this change and determines whether there is a touch by the user.

However, as shown in FIG. 5 (b), when only a user touch is applied, since the contact area between the upper substrate 110 and the finger is small, the sub-electrode 130c of the first electrode closest to the finger An electric field is generated only between the fingers, but no electric field is generated between the fingers and the other sub-electrodes 130d and 130b relatively far from the fingers.

However, as shown in FIG. 6 , when the touch pressure increases after a touch input by the user, the contact area between the user's finger and the upper substrate 110 becomes wider than the area shown in FIG. 5 (b).

Referring to FIG. 6 , since the contact area between the finger and the upper substrate 110 is increased, the number of sub-electrodes forming the electric field with the finger may increase accordingly, and thus the strength of the external electric field applied to the touch screen panel 100 may increase. can

Accordingly, an electric field may be formed not only with the sub-electrode 130c that generated the electric field in FIG. 5 (b) but also with the other sub-electrodes 130b and 130d located relatively far from the user's finger.

Therefore, in this case, since the value of the capacitance formed between the first electrode 130 and the second electrode 150 changes more than the case of FIG. 5 (b), the controller simply applies the user's touch through this change. pressure can be judged.

Furthermore, there is an effect that the control unit can determine the degree of pressure based on the capacitance value that changes according to the user's touch. That is, if the capacitance value changes a lot, it can be recognized that a strong pressure is applied, and if not, it can be determined that a relatively weak pressure is applied.

Referring to FIG. 7 , a capacitance value that varies according to the intensity of a user's touch can be known.

That is, the capacitance value maintains a small value because it is not affected by the external electric field before the touch input is applied, but the capacitance value increases when the touch input is applied, and furthermore, when the user's pressure becomes stronger, the capacitance is relatively large. A change in value occurs.

Therefore, the touch screen panel 100 according to the present invention can determine whether a touch by the user corresponds to a simple touch or a touch by pressure based on the change value.

In the case of a conventional touch screen panel, even if a user applies pressure after a touch input is applied, the change in the internal electric field is insignificant because the conductive member 120 does not exist, as in the present invention.

Therefore, even if the user applies a touch or applies a pressure after the touch, a change in the electric field similar to that shown in FIG. That is, 3-dimensional touch recognition was not possible.

However, in the case of the touch screen panel 100 corresponding to the present invention, since the conductive member 120, specifically, a transparent electrode film having good electrical conductivity, is present under the first upper substrate 110, the finger It can respond sensitively to touch.

That is, in the case of the touch screen panel 100 corresponding to the present invention, although the dielectric constant of the optically transparent adhesive (OCA) itself is not improved, the conductive member has an effect similar to that of the optically transparent adhesive (OCA) itself being improved. There are advantages to be gained.

In addition, although not shown in FIGS. 2 to 6 , the present invention may be configured by forming a transparent electrode under the upper substrate 110 instead of inserting the conductive member 120 . In this case, the same effect as in the present invention in which the above-described conductive member 120 is inserted can be obtained.

That is, a touch by a user can be sensitively recognized by forming a transparent electrode at the bottom when manufacturing the upper substrate 110 instead of using a separate insertion member.

A transparent electrode is an electrode that transmits light and conducts electricity. As a thin film of tin oxide, indium oxide, platinum, or gold coated on glass, the same effect as using the conductive member 120 can be obtained because it has excellent conductivity.

In addition, when a transparent electrode is formed on the upper substrate 110, it can be used as a ground electrode (ground electrode) by connecting a grounding power source to the transparent electrode.

In this case, when the user applies a touch to press the upper substrate 110, the magnitude of the pressure applied by the user may be sensed using a distance difference between the ground electrode and the first electrode 130.

In addition, when battery power is applied and maintained at the ground level, when static electricity flows into the touch screen panel 100, instantaneous high current due to static electricity can escape through the ground electrode, so the touch screen panel 100 is more stable. can be driven by

Other characteristics and effects occurring when the transparent electrode is formed under the upper substrate 110 are the same as those of the touch screen panel 100 when the conductive member 120 described in FIGS. 2 to 5 is inserted, so they will be omitted. .

8 and 9 are views showing an example of a pattern formed by the first electrode 130 and the second electrode 150 according to an embodiment of the present invention.

The arrangement of the first electrode 130 and the second electrode 150 is called a pattern, and the touch recognition rate of the touch screen panel is increased according to the arrangement of the first electrode 130 and the second electrode 150. As it changes, there are many different types according to the purpose of use.

Therefore, the conductive member 120 is also applied to the direction and structure in which the first electrode 130 and the second electrode 150 are arranged, and to the first electrode 130 and the second electrode 150 in order to optimize the operation of the pressure sensor. Various patterns may be formed in consideration of the magnitude or resistance of the voltage to be applied.

8 and 9 show the arrangement of the first electrode 120 and the second electrode 150, but the conductive member 120 may also have the same pattern. Of course, it may be formed in a non-identical pattern depending on the purpose of use and the environment.

In addition, although FIGS. 8 and 9 show a diamond-shaped pattern and a quadrangular-shaped pattern, it is not limited thereto and may be implemented in various shapes such as a polygon, a circle, or an ellipse according to the purpose of use.

10 and 11 are diagrams comparing the effects of the conventional touch screen panel and the touch screen panel 100 according to the present invention.

Referring to FIG. 10 (a) , in the case of a conventional touch screen panel, there is no significant difference between a capacitance value that changes when touched or a capacitance value that changes when pressure is applied after touch. That is, the conventional touch screen panel has a disadvantage in that it is difficult to use a three-dimensional touch sensor because it is difficult to know exactly whether the user applied pressure or simply touched the touch screen panel.

However, as shown in FIG. 10 (b), in the case of the touch screen panel 100 according to the present invention, when pressure is applied after touch, the value of capacitance that changes dramatically increases. It can determine whether a touch has been made.

More specifically, when the capacitance value changes relatively much, it can be recognized that the user has applied pressure with a stronger magnitude than the previously applied pressure, and on the contrary, when the capacitance value is relatively reduced, it can be recognized that the pressure is smaller than the previously applied pressure. The size can determine whether the user is applying pressure.

11 is also a diagram comparing effects of a conventional touch screen panel and a touch screen panel 100 according to the present invention.

The graph on the left of FIG. 11 shows the change in capacitance that occurs when pressure is applied to the conventional touch screen panel, and the graph on the right shows the change in capacitance that occurs when pressure is applied to the touch screen panel according to the present invention. am. The bolded portion in FIG. 11 represents the capacitance that changes when pressure is applied after a touch.

Referring to FIG. 11 , in the case of a conventional touch screen panel, even if pressure is applied after a touch, the change in capacitance value is so small that it is impossible to recognize a darkened part itself on a graph.

However, in the case of the touch screen board according to the present invention, when a pressure is applied after a touch, there are many changes that can be easily recognized in a dark part on the graph. That is, since the value of the capacitance increases rapidly, the strength of the user's touch pressure can be more easily measured.

12 and 13 are diagrams illustrating examples in which a touch screen panel can be advantageously utilized as a part of a display device according to various embodiments of the present disclosure.

12(a) shows a case in which the touch screen panel 100 according to an embodiment of the present invention is applied to the mobile device 200, and FIG. 12(b) shows the touch screen panel according to an embodiment of the present invention. 13 (a) shows the case where (100) is applied to the vehicle navigation 300, and (b) shows the case where the touch screen panel 100 according to an embodiment of the present invention is applied to the display 400. ) is a view showing a case where the touch screen panel 100 according to an embodiment of the present invention is applied to the outdoor billboard 500.

The mobile device 200 of FIG. 12 (a) refers to a miniaturized device such as a smart phone, a mobile phone, a tablet PC, or a PDA, and when the touch screen panel 100 is installed in the mobile device 200, external power is not supplied. Since its own battery is used instead of the touch screen panel, components of the touch screen panel 100 may be designed to be suitable for the limited battery capacity.

Since the touch screen panel 100 according to an embodiment of the present invention can detect the intensity of a user's touch, a separate magnetic field forming layer or an accessory such as a pen for detecting the intensity of a user's touch is not required. In addition, the mobile device 200 capable of detecting the user's touch intensity may execute various applications based on the user's touch intensity.

In (b) of FIG. 12 , the vehicle navigation 300 may include the touch screen panel 100 and a plurality of manipulation elements, and may be controlled by a processor installed inside the vehicle.

In the case of the vehicle navigation 300, a wide variety of functions are implemented, but accordingly, the user interface may be complicated, and it may be difficult for the user to apply various touch inputs to the vehicle navigation 300 in the vehicle.

However, when the touch screen panel 100 according to an embodiment of the present invention is applied to the vehicle navigation 300, since the user's touch intensity can be detected, the user can easily adjust the touch intensity, etc. to the vehicle navigation 300. can be manipulated.

The display 400 in (a) of FIG. 13 refers to a device such as a TV or a monitor, and when the touch screen panel 100 according to an embodiment of the present invention is used as the display means 300, the user may use the display 300 Since a command can be directly input through a touch to the display 300 according to the screen displayed in ), the user can use the display 300 more conveniently.

The outdoor billboard 500 of FIG. 13 (b) may include a touch screen panel 100 and a support connecting the touch screen panel 100 to the ground.

When the touch screen panel 100 according to an embodiment of the present invention is applied to the outdoor billboard 500, an advertiser may display an advertisement considering both a user's touch input position and touch strength on the outdoor billboard 500. Since the user can experience various user experiences with respect to the advertisement displayed through the outdoor billboard 500, the advertisement effect of the advertiser can be maximized.

So far, the characteristics and effects of the present invention have been studied through various embodiments of the present invention.

In the case of a conventional touch screen panel, a separate sensor is required to recognize a user's touch pressure, which causes various problems such as production cost and complexity of the internal structure.

According to the present invention, not only a two-dimensional touch but also the intensity of a touch due to pressure can be sensed even without an additional sensor device on the touch screen panel, so that a three-dimensional touch can be efficiently sensed. Accordingly, there is an advantage of providing a user with a touch screen panel with significantly improved touch performance.

Although the embodiments so far have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved. Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

100: touch screen panel
110: upper board
120: conductive member
130: first electrode
140: dielectric layer
150: second electrode
160: lower substrate

Claims (20)

an upper substrate and a lower substrate spaced apart from each other;
a first electrode and a second electrode disposed between the upper substrate and the lower substrate;
a dielectric layer disposed between the first electrode and the second electrode;
a conductive member disposed between the upper substrate and the first electrode and formed with a preset pattern; and
A control unit detecting a user's touch based on a change in capacitance between the first electrode and the second electrode;
The control unit,
The touch screen panel determines the user's touch pressure based on a rate of change between a capacitance value when the user touches and a capacitance value when the user applies touch pressure. According to claim 1,
The conductive member,
A touch screen panel comprising a transparent conductive film. According to claim 1,
The pattern (Pattern),
A touch screen panel formed in response to the resistance, structure, or applied voltage of the first electrode and the second electrode. delete According to claim 1,
The first electrode includes a plurality of first conductive lines parallel to each other,
The second electrode includes a plurality of second conductive lines perpendicularly crossing the plurality of first conductive lines. According to claim 1,
The touch screen panel further comprises an adhesive member provided between the first electrode and the second electrode. According to claim 6,
The adhesive member is
A touch screen panel comprising any one of an optically clear adhesive (OCA) and an optically clear resin (OCR). According to claim 1,
The upper and lower substrates,
A touch screen panel comprising either tempered glass or a transparent film. delete delete delete delete delete delete delete According to claim 2,
The transparent conductive electrode becomes a ground electrode by applying a ground voltage,
The control unit,
A touch screen panel that senses a user's touch using a distance between the transparent conductive electrode and the first electrode. a display panel displaying information; and
A touch screen panel coupled to one side of the display panel;
The touch screen panel,
an upper substrate and a lower substrate spaced apart from each other;
a first electrode and a second electrode disposed between the upper substrate and the lower substrate;
a dielectric layer disposed between the first electrode and the second electrode;
a conductive member disposed between the upper substrate and the first electrode and formed with a preset pattern; and
A control unit detecting a user's touch based on a change in capacitance between the first electrode and the second electrode;
The control unit,
The display device that determines the user's touch pressure based on a rate of change between a capacitance value when the user touches and a capacitance value when the user applies the touch pressure. ◈Claim 18 was abandoned when the registration fee was paid.◈ According to claim 17,
The conductive member,
A display device including a transparent conductive film or a transparent conductive electrode. According to claim 17,
The conductive member,
A display device in which a pattern is formed based on the resistance, structure, or applied voltage of the first electrode and the second electrode. delete

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