KR20060121458A - Case for applying signal - Google Patents

Abstract

A case for inputting a signal is provided to be used as an additional signal inputting device correspondingly to miniaturization of a mobile communication terminal by arranging electrodes on a surface. A case for inputting a signal comprises plural sensing electrodes(410a,410b) arranged on its outer surface, and lower electrodes(420a,420b) arranged on its inner surface. The lower electrodes(420a,420b) are connected to an IC(Integrated Circuit) for a signal process and can sense a contact. The lower electrodes can sense a contact of a user by measuring a variation of a capacitor. A material of the case has to be thin and has insulation property in order to use the case itself as a signal inputting device by using distributed capacitors.

Description

Case for signal input {CASE FOR APPLYING SIGNAL}

1 is a block diagram of a key signal input device according to the prior art.

Figure 2 is a plan view of a keyboard for a mobile communication terminal according to the prior art.

Figure 3 is a plan view of a one-touch type character input device using a keypad according to the prior art.

4A to 4F are cross-sectional views of a portion including a sensing electrode of a case for signal input according to the present invention.

<Description of the symbols for the main parts of the drawings>

110: keypad 115: operation stick

120: direction and pressure detection unit 130: A / D converter

140: position detection unit 150: microprocessor

160: display device 410: sensing electrode

420: lower electrode 430: case

440: electrically conductive material 450: insulating material

455: second insulating material 460: counter electrode

The present invention relates to a case for inputting a signal, and more particularly, in order to control the miniaturization of a mobile communication terminal, a signal input for controlling a character input or a directional signal input of a mobile communication terminal, and various functions embedded in the mobile communication terminal. The present invention relates to a case for signal input in which electrodes are placed on the case surface to use the entire case as an additional signal input means.

The keypad is mainly an input device for numeric input of a mobile communication terminal or a remote control. In addition, it is utilized as a means for entering numbers in various devices such as a card inquiry machine or an electronic scale using a communication network.

Such a keypad has been developed for numeric input and its main purpose is also used for numeric input, but recently, for example, in the case of a mobile communication terminal, there is an increasing need for text input for writing a text message or processing information. In the case of the remote control, the digitization of the TV is progressing and the necessity for text input is increasing in providing an application service in the digital TV service. In addition, in the case of a mobile communication terminal, the screen size continues to increase due to the integration with a digital camera, and as the size of the terminal becomes smaller, the area allocated to the input means such as a keypad and a navigation button is decreasing, and multimedia such as MP3 or DMB is reduced. As functions are additionally applied to terminals, necessary input functions are also increasing, and various methods for inputting signals have been developed in response to the miniaturization of such terminals and an increase in demand for input functions.

For example, Patent No. 10-0459436, entitled "Key Signal Input Device of Mobile Communication Terminal," filed on September 2, 2002 and filed on November 22, 2004 by LG Electronics Inc., provides various key buttons. Disclosed is a technique for inputting signals corresponding to a through a key signal input device.

1 is a block diagram of a key signal input device disclosed in Patent Registration No. 10-0459436.

As shown in the figure, the key signal input device includes a keypad 110 for outputting various key signals according to a user's key operation, and an operation direction and pressing of an operation stick 115 installed on one side of the keypad to be elastically supported in an up and down direction. Direction and pressure detection unit 120 for outputting a corresponding detection signal according to the pressure change by the A / D converter for converting the analog detection signal output from the direction and the pressure detection unit 120 into a digital signal ( 130 and a position detection unit for determining the operation direction and pressure change of the operation stick 115 based on the digital signal input from the A / D converter 130 and outputting the determination result to the microprocessor 150. 140 and a microprocessor 150 for controlling the play of an entertainment game or the like displayed on the display device 160 or selecting a menu based on the signal input from the position detector 140.

In other words, the key signal input device disclosed in Patent Registration No. 10-0459436 can be considered to be a miniaturized conventional navigation key button.

In addition, Utility Model Registration No. 20-0390034, filed on June 29, 2002 and registered on September 9, 2002 by Pantech & Curitel, also uses a single input key instead of a conventional navigation key. It also discloses a method of providing a simple input function in appearance.

However, Patent Registration No. 10-0459436 or Utility Model Registration No. 20-0390034 is merely a configuration that replaces a conventional navigation key used for directional input, and is not sufficient to perform various signal inputs according to an increase in input demand. There is a lack.

In addition, a technology for inputting a character for a device such as a mobile communication terminal or a remote control is also being developed. Keypads used in mobile communication terminals or remote controllers are inherently developed for numeric input. Therefore, it is very inconvenient for a user to input characters through these keypads. In order to solve this drawback, for example, a mobile communication information processing terminal such as a PDA adopts a configuration in which a user can simply input text by using a touch screen method, for example, but the touch screen method also uses an input speed in use. There is a very slow disadvantage, so there is a case of developing a product by inputting by using a separate keyboard or by replacing it with another input means other than the keypad, but these products have not been put to practical use due to the disadvantage of being unfamiliar with the user.

For example, Utility Model Registration No. 20-0351906, entitled “Keyboard for Mobile Communication Terminal,” filed March 3, 2004 and registered on May 20, 2004 by Lee Seong-chan, discloses a configuration using a separate keyboard. Doing.

2 is a plan view of a keyboard for a mobile communication terminal disclosed in the Utility Model Registration No. 20-0351906.

As shown, it is possible to input Korean, English, numbers and various function keys by using a plurality of keys so that various characters can be input in a mobile communication terminal without using a separate keyboard and include a mouse function. .

However, although this configuration is easy to input a large number of characters, the configuration is complicated and the possibility of failure is also inconvenient for the user because the input is performed through a separate character arrangement rather than the character arrangement of the keypad or keyboard familiar to the user. In addition, since a plurality of keys are arranged, there is a disadvantage in that the mobile communication terminal cannot be miniaturized.

In order to solve this problem, Patent Application No. 10-2005-0039447, entitled "One-Touch Character Input Device," filed on May 11, 2005 by the present applicant, does not indicate that a keypad is simply pressed. Instead of distinguishing between the two states for discriminating the present invention, a method of configuring the key button to be tilted and sensed in which direction is pressed to correspond to a plurality of characters corresponding to the key button is disclosed.

3 is a plan view of a one-touch type character input device using the keypad disclosed in the patent application No. 10-2005-0039447.

As shown in FIG. 3A, the sensing electrode lines SL1 to SL4 are disposed between the key buttons of the keypad, or as shown in FIG. 3B, the sensing areas SA1 to SA4 in each direction of the key button. ) To detect which part of the key button the user touches and input a plurality of characters in one-touch manner.

That is, the patent application No. 10-2005-0039447 improves the disadvantage of requiring a complicated configuration such as a navigation key of a conventional mobile communication terminal in order to detect in which direction the existing key button is pressed. A sensor for detecting a contact of a user is disposed in the sensor, and in which direction, a user presses a key to detect a user's touch, thereby inputting a corresponding character by one touch.

However, the patent application No. 10-2005-0039447 discloses a configuration in which a sensing sensor is disposed only around a keypad, and mainly relates to a configuration of using a sensing sensor for text input. In other words, it is a technology that can be mainly applied to a keypad of a mobile communication terminal or a remote control, and is not a technology that can perform signal input using the entire case of the mobile communication terminal or the remote control.

Therefore, there is a growing need for a method of utilizing the entire case as a signal input means for character input, directional signal input, and various functions embedded in a mobile communication terminal.

An object of the present invention is to place the electrode on the surface of the case for the signal input for controlling the character input, directional signal input, and other functions embedded in the mobile communication terminal in response to the miniaturization of the mobile communication terminal It is to provide a case for signal input using as an additional signal input means.

In order to achieve the above technical problem, the present invention provides a signal input including a sensing electrode disposed on a surface of the case and a lower electrode disposed corresponding to the sensing electrode on an inner surface of the case. It provides a case sensor for.

In addition, the present invention is a case for inputting a signal, a sensing electrode disposed on the surface of the case, a lower electrode disposed to correspond to the sensing electrode on the inner surface of the case, the sensing electrode and the lower electrode on the case The present invention provides a case for inputting a signal including an electrically conductive material filled in a hole formed to correspond to the upper electrode and the lower electrode.

In the case for signal input according to the present invention, it is preferable to further include an insulating material covering the inner surface of the case including the lower electrode, and a counter electrode disposed to correspond to the lower electrode on the surface of the insulating material. .

In addition, the present invention is a case for inputting a signal, a sensing electrode disposed on the surface of the case, a lower electrode disposed to correspond to the sensing electrode on the inner surface of the case, the sensing electrode and the lower electrode on the case An electrical conductive material filled in a hole corresponding to the upper electrode and the lower electrode to electrically connect the upper electrode and the lower electrode, and disposed at a portion where the sensing electrode, the lower electrode, and the electrically conductive material contact the case; Provided is a case for signal input comprising an insulating material that provides electrical isolation from and.

In the case for signal input according to the present invention, the case further comprises a second insulating material covering the inner surface of the case including the lower electrode, and a counter electrode disposed on the surface of the second insulating material corresponding to the lower electrode; It is desirable to.

In another aspect, the present invention provides a case for the signal input, the sensing electrode is disposed in the groove formed inclined to the surface of the case, the lower electrode formed corresponding to the sensing electrode on the inner surface of the case, the sensing in the case An electrically conductive material filled in a hole corresponding to the electrode and the lower electrode to electrically connect the upper electrode and the lower electrode, and a portion where the sensing electrode, the lower electrode, and the electrically conductive material contact the case An insulating material disposed on the surface of the second insulating material, the second insulating material covering the inner surface of the case including the lower electrode, and a second insulating material disposed on the surface of the second insulating material. A case for signal input including a counter electrode is provided.

In the case for signal input according to the present invention, it is preferable to further include a touch sensing unit for measuring the contact strength by measuring the contact resistance of the sensing electrode.

In addition, in the case for the signal input according to the present invention, it is preferable to further include a second contact detecting unit for detecting a contact strength by measuring a change in capacitance between the sensing electrode and the lower electrode.

In addition, in the case for the signal input according to the present invention, it is preferable to further include a third contact detecting unit for detecting the contact strength by measuring the change in capacitance between the sensing electrode and the counter electrode.

In addition, in the case for signal input according to the present invention, the sensing electrode may be formed by selectively electroplating on the surface of the case.

In addition, in the case for signal input according to the present invention, the sensing electrode may be formed at the same height as the surface of the case.

In addition, in the case for signal input according to the present invention, the sensing electrode may be formed below the surface of the case.

In addition, in the case for signal input according to the present invention, the sensing electrode may be formed in the shape of the end portion semi-circular or conical.

In addition, in the case for the signal input according to the present invention, the case is a case of a mobile communication terminal including a keypad, the plurality of sensing electrodes are disposed around the keypad to the key button of the keypad in any direction It can be configured to detect if it is pressed.

In addition, in the case for signal input according to the present invention, the case is a case of a mobile communication terminal, it is possible to implement the form of a keypad on the surface of the case by placing a plurality of the sensing electrode.

In addition, in the case for the signal input according to the present invention, if a plurality of sensing electrodes sequentially detect a contact can be configured to recognize the signal input corresponding to the contact by software to input the sequential contact in a specific shape. have.

In addition, in the case for signal input according to the present invention, the case is a case of a mobile communication terminal, a plurality of sensing electrodes may be disposed on both surfaces or both sides of the case of the mobile communication terminal.

In addition, in the case for signal input according to the present invention, some of the plurality of sensing electrodes may be configured to protrude so that the user can detect the directional signal input.

In addition, in the case for the signal input according to the present invention, the case is a battery case used in the mobile communication terminal is disposed a plurality of sensing electrodes on the surface of the battery, the case for the signal connection with the mobile communication terminal It is preferable to include a connector.

In addition, in the case for signal input according to the present invention, the case is a case of the mobile communication terminal is configured to form a space for accommodating the battery therein to be connected to the battery, the sensing electrodes are both surfaces of the case Or on both sides.

Hereinafter, a case for signal input of the present invention will be described in more detail with reference to the drawings.

4A to 4F are cross-sectional views of a part including a sensing electrode of a case for signal input according to the present invention. As shown, the case for signal input according to the present invention includes a plurality of sensing electrodes, which are used as a sensor for sensing a user's touch.

4A is a cross-sectional view of a case for signal input according to a first embodiment of the present invention. As shown, a plurality of sensing electrodes 410a to 410b are disposed on the surface of the insulating case 430, lower electrodes 420a to 420b are disposed on the inner surface of the insulating case 430, and lower electrodes 420a to 430. 420b) is connected to the signal processing IC and configured to detect whether there is a contact. By measuring the change of the capacitor in each of the lower electrodes (420a to 420b) it can be detected whether the user contacts. In addition, each of the lower electrodes 420a to 420b may be connected to an IC for signal processing to measure a change in a capacitor. However, the details of the IC for signal processing correspond to the prior art and correspond to each lower electrode below. The detailed description of the configuration for performing the signal processing is omitted.

Using the case itself as a means for signal input using such a dispersing capacitor has the limitation that the case material must be very thin and insulated, and the uniformity of the physical property must be ensured. However, in the actual use environment, such as a mobile communication terminal due to these limitations there are disadvantages that are not practical in terms of durability and antistatic in a variety of use environment.

4B is a cross-sectional view of a case for signal input according to a second embodiment of the present invention. As shown, the sensing electrodes 410a to 410b are exposed on the surface of the insulating case 430, and holes are formed in the insulating case 430 to fill the electrically conductive materials 440a to 440b therein, respectively, and to correspond to the lower electrodes. 420a to 420b are disposed on the inner surface of the insulating case 430 so that the sensing electrodes 410a to 410b and the lower electrodes 420a to 420b are electrically connected to each other through corresponding electrically conductive materials 440a to 440b. It is a configuration that can detect the contact.

In addition, the configuration according to the second embodiment of the present invention may be used even when the thickness of the case 430 is not constant unlike the configuration according to the first embodiment of the present invention.

4C is a cross-sectional view of a case for signal input according to a third embodiment of the present invention. As illustrated, an insulating material 450 is disposed on a portion of the metal case 430 that contacts the sensing electrodes 410a to 410b, the lower electrodes 420a to 420b, and the electrically conductive materials 440a to 440b. 430 and electrically insulated.

This embodiment may be particularly applicable when the case 430 is manufactured using an electrically conductive material such as metal.

4D is a cross-sectional view of a case for signal input according to a fourth embodiment of the present invention. As illustrated, an insulating material 450 is disposed on a portion of the metal case 430 that contacts the sensing electrodes 410a to 410b, the lower electrodes 420a to 420b, and the electrically conductive materials 440a to 440b. And a second insulating material 455 disposed on the inner surface of the case 430 to cover the lower electrodes 420a to 420b, and then to each lower electrode 420a to 420b. The counter electrodes 460a to 460b are additionally disposed.

As shown, since the second insulating material 455 is disposed between each of the counter electrodes 460a to 460b and the lower electrodes 420a to 420b, the user can be measured at a certain point by measuring the change of the capacitor according to the user's contact. It is possible to know whether the contact has occurred.

4E is a cross-sectional view of a case for signal input according to a fifth embodiment of the present invention. As illustrated, the sensing electrodes 410a to 410b, the lower electrodes 420a to 420b, and the electrically conductive materials 440a to 440b are disposed on the insulating case 430, and the lower electrode (the lower electrode) is disposed on the inner surface of the insulating case 430. After the insulating material 450 covering the 420a to 420b is additionally disposed, the counter electrodes 460a to 460b corresponding to the lower electrodes 420a to 420b are additionally disposed.

As shown, since the insulating material 450 is disposed between each of the counter electrodes 460a to 460b and the lower electrodes 420a to 420b, when the change of the capacitor according to the user's contact is measured, the user's contact at a certain point is measured. It can be seen whether this has occurred.

In the fourth embodiment or the fifth embodiment of the present invention, connection lines and connection pins with ICs for signal processing are not required to correspond to the respective sensing electrodes, and signal electrodes are connected by connecting the counter electrodes 460a to 460b. It is possible to minimize the number of connection lines and the number of connection pins to the IC for signal processing because only the change of the overall capacitor needs to be measured in the IC for signal processing and the IC for signal processing.

4F is a cross-sectional view of a case for signal input according to a sixth embodiment of the present invention.

In the case for signal input according to the sixth embodiment of the present invention, grooves are formed on the surface of the insulating case 430, and sensing electrodes 410a to 410b are disposed on both sides of the grooves formed obliquely as shown. to be. In addition, corresponding electrically conductive materials 440a to 440b, lower electrodes 420a to 420b, insulating material 450, and counter electrodes 460a to 460b are disposed, respectively.

In such a configuration, for example, the contact strength changes according to which direction the user presses the sensing electrodes 410a to 410b with a finger. When the contact strength is measured by the RC time constant method, the direction and the strength of the finger press are measured. Can be measured simultaneously.

Therefore, when the plurality of sensing electrodes 410a to 410b configured to measure the contact strength can be arranged, the direction of the user input can be measured, so that the direction input function of the joystick or the mouse can be simply implemented. Such a direction input function such as a joystick can implement a signal input means useful especially when providing an application such as a game through a mobile communication terminal.

That is, the sensing electrodes 410a to 410b are arranged in the shape of a round circle or ellipse, or the grooves in which the sensing electrodes 410a to 410b are arranged in a plurality of concentric shapes to perform the directional input function of the joystick. Can be.

In addition, although the case for the signal input according to the sixth embodiment of the present invention is an embodiment assuming an insulating case, for example, in the case of a metal case, as in the embodiment described with reference to FIG. The insulating material may be disposed at a portion in contact with 410a to 410b, the lower electrodes 420a to 420b, and the electrically conductive materials 440a to 440b.

In addition, in the case for signal input according to the first to sixth embodiments of the present invention, the contact strength of the user can be measured by measuring the contact resistance or the contact area. For example, in the case of the second or third embodiment, since the contact resistance varies according to the contact strength of the user, it may be configured to include a touch sensing unit (not shown) for measuring the contact resistance. Such a touch sensor may be configured to be performed in, for example, an IC for signal processing. In addition, in the case of the first embodiment, by measuring the change in capacitance between the contact electrodes 410a to 410b and the lower electrodes 420a to 420b, the contact area may be obtained, and thus the contact strength may be measured. In other embodiments, the contact electrodes 410a to 410b and the lower electrodes 420a to 420b are electrically connected to each other, and the counter electrodes 460a to 460b are disposed with an insulating material therebetween. The change in capacitance between 410b and the counter electrodes 460a to 460b may be measured to measure the contact area, thereby measuring the contact strength. In order to measure the change in capacitance, a separate touch sensor (not shown) may be included.

In addition, the sensing electrodes 410a to 410b may be formed by electroplating only a portion where the electrode is selectively positioned on the case surface. In FIGS. 4a to 4f, the sensing electrodes 410a to 410b protrude from the case surface. Although shown in the form, the sensing electrodes 410a to 410b are not configured to protrude from the case surface, but may be formed at the same height as the case surface or disposed below the case surface.

In addition, the sensing electrodes 410a to 410b may have a semicircular or conical shape or other three-dimensional shape.

The various shapes of the sensing electrodes 410a to 410b are based on the shape of the sensing electrodes 410a to 410b and the relative contact with the case surface, so that the contact resistance when the user contacts each other may vary. Through this, various signals can be input. Therefore, when designing the case, the shape of the desired sensing electrodes 410a to 410b may be selectively configured according to various uses.

In addition, the case for signal input according to the present invention can be applied to, for example, a mobile communication terminal.

For example, as shown in (b) of FIG. 3, a plurality of sensing electrodes are disposed around the key buttons in the keypad of the mobile communication terminal, respectively, to sense in which direction the key buttons of the keypad are pressed through the sensing electrodes to one-touch a plurality of characters. Can be configured to be entered. That is, users who are familiar with the current mobile phone will want to use the keypad for number input, so each key button of the keypad can be used as it is for number input, and a plurality of sensing electrodes are arranged around the key button. It can be configured to detect a direction such as whether the left side of the button is pressed or the right side of the button and to input a plurality of characters with one touch.

In this case, the unused space between the current key button and the key button has sufficient space to place the sensing electrodes, and software detection of which of the sensing electrodes is pressed is automatically performed. The display device included in the mobile communication terminal may indicate whether a character desired to be input by the user is input.

In addition, when applied to a mobile communication terminal, it is possible to arrange the sensing electrode in the form of a keypad according to the technical idea of the case for signal input according to the present invention without adopting a conventional button-type keypad. In this case, the user can input a desired signal simply by touching a plurality of sensing electrodes arranged in the form of a keypad. That is, for example, the keypad is composed of key buttons 0 to 9 and 12 key buttons of * key button and # key button, but each key button is sensed using a sensing electrode. It may be arranged to display in the form of '1' by arranging.

In addition, when a plurality of sensing electrodes sequentially detect a contact, a signal input corresponding to the corresponding contact may be recognized by software to input a sequential contact in a specific shape. For example, if a user presses two times consecutively, such as a double-click of a mouse, or sequentially presses a plurality of sensing electrodes to form a shape such as a circle, a rectangle, or a triangle, the software automatically recognizes the shape. It can also be configured. The function of inputting such a shape can be applied to, for example, perform a function of a shortcut key.

In addition, the sensing electrode may be disposed on the side of the mobile communication terminal to input various signals.

It may also be applied to the battery of the mobile communication terminal, not just the integrated case. That is, since the battery itself can be considered as a case, if a sensing electrode is placed on the surface of the battery and the user inputs the signal using the sensing electrode, more various signals can be input. In this case, however, a connector for transmitting a signal input detected by the mobile terminal and the sensing electrode will be required.

In addition, if the mobile communication terminal is configured to form a space in the case of the mobile communication terminal and store the battery in the groove of the mobile communication terminal, the sensing electrodes may be disposed on both surfaces of the case of the mobile communication terminal without this limitation. Could be.

In addition, if the configuration of the case for signal input according to the sixth embodiment of the present invention is used instead of the navigation key of the mobile communication terminal, the user can easily perform the directional input, and furthermore, a function such as a joystick, a mouse, or a touch pad. It can be easily implemented in a mobile communication terminal.

That is, the case for signal input according to the present invention, in particular, in the case of a mobile communication terminal, does not limit the input function to a current keypad or navigation key, but arranges a sensing electrode on a necessary portion of the surface of the case, and detects and counters Capacitance is generated by the case or insulating material to measure the change in capacitance to sense signal input or to be connected to the lower electrode formed on the inner surface of the case through the conductive conductor from the sensing electrode and using the lower electrode. And to detect a contact.

This configuration allows you to place additional input methods, add joystick functions to some of the navigation keys, or even place the current battery, while leaving the button type input functions you are already familiar with. Means for signal input can be arranged.

Therefore, the entire area of the mobile communication terminal case can be utilized as a means for signal input, thereby minimizing the size of the terminal and increasing the demand for signal input.

Although the present invention has been described in detail, this is for illustrative purposes only, and the protection scope of the present invention is not limited thereto, and the protection scope of the present invention is defined through the description of the claims.

As described above, according to the present invention, in response to the miniaturization of the mobile communication terminal, an electrode is placed on the surface of the case for signal input for controlling character input, directional signal input, and other functions embedded in the mobile communication terminal. The entire case can be used as an additional signal input means.

Claims (20)

As a case for signal input, A sensing electrode disposed on a surface of the case; A lower electrode disposed to correspond to the sensing electrode on an inner surface of the case; Case sensor for signal input comprising a. As a case for signal input, A sensing electrode disposed on a surface of the case; A lower electrode disposed to correspond to the sensing electrode on an inner surface of the case; An electrically conductive material filled in a hole formed in the case corresponding to the sensing electrode and the lower electrode to electrically connect the upper electrode and the lower electrode. Case for signal input comprising a. The method of claim 2, An insulating material covering an inner surface of the case including the lower electrode; A counter electrode disposed on the surface of the insulating material to correspond to the lower electrode; Case for signal input further comprising. As a case for signal input, A sensing electrode disposed on a surface of the case; A lower electrode disposed to correspond to the sensing electrode on an inner surface of the case; An electrically conductive material filled in the case and formed in a hole corresponding to the sensing electrode and the lower electrode to electrically connect the upper electrode and the lower electrode; An insulating material disposed at a portion where the sensing electrode, the lower electrode, and the electrically conductive material are in contact with the case to provide electrical insulation with the case; Case for signal input comprising a. The method of claim 4, wherein A second insulating material covering an inner surface of the case including the lower electrode; A counter electrode disposed on the surface of the second insulating material to correspond to the lower electrode; Case for signal input further comprising. As a case for signal input, A sensing electrode disposed in a groove inclined on the surface of the case; A lower electrode formed on an inner surface of the case to correspond to the sensing electrode; An electrically conductive material filled in the case and formed in a hole corresponding to the sensing electrode and the lower electrode to electrically connect the upper electrode and the lower electrode; An insulating material disposed at a portion where the sensing electrode, the lower electrode, and the electrically conductive material contact the case, to provide electrical insulation with the case; A second insulating material covering an inner surface of the case including the lower electrode; A counter electrode disposed on the surface of the second insulating material to correspond to the lower electrode; Case for signal input comprising a. The method according to claim 2 or 4, A case for signal input further comprising a touch sensing unit for sensing the contact strength by measuring the contact resistance of the sensing electrode. The method of claim 1, And a second contact sensing unit configured to measure a change in capacitance between the sensing electrode and the lower electrode to sense a contact strength. The method according to any one of claims 3, 5 and 6, And a third touch sensing unit configured to measure a change in capacitance between the sensing electrode and the counter electrode to sense a contact strength. The method according to any one of claims 1 to 6, And the sensing electrode is formed by selectively electroplating the surface of the case. The method according to any one of claims 1 to 6, And the sensing electrode is formed at the same height as the surface of the case. The method according to any one of claims 1 to 6, And the sensing electrode is formed below the surface of the case. The method according to any one of claims 1 to 6, The sensing electrode is a case for signal input that the shape of the end is semi-circular or conical. The method according to any one of claims 1 to 6, The case includes a keypad as a case of the mobile communication terminal, And a plurality of sensing electrodes arranged around the keypad to detect in which direction the key button of the keypad is pressed. The method according to any one of claims 1 to 6, The case is a case of a mobile communication terminal, Case for inputting a signal to implement the form of a keypad on the surface of the case by placing a plurality of the sensing electrode. The method of claim 15, When the plurality of sensing electrodes to sequentially detect the touch to recognize the signal input corresponding to the corresponding contact in software to input the sequential contact in a specific shape. The method according to any one of claims 1 to 6, The case is a case of a mobile communication terminal, And a plurality of sensing electrodes arranged on both surfaces or both sides of the case of the mobile communication terminal. 18. The case of claim 17, wherein some of the plurality of sensing electrodes are configured to protrude to detect a directional signal input of a user. The method according to any one of claims 1 to 6, The case is a battery case used in a mobile communication terminal, a plurality of sensing electrodes are disposed on the surface of the battery, the case includes a case for signal input to the connector for signal connection with the mobile communication terminal. The method according to any one of claims 1 to 6, The case is a case of a mobile communication terminal and is configured to connect a battery by forming a space for accommodating the battery therein, And the sensing electrode is disposed on both surfaces or both sides of the case.

Images