Patent Publication Number: US-7724244-B2

Title: Slide-type input device, portable device having the input device and method and medium using the input device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   This application claims the benefit of Korean Patent Application No. 10-2005-0091365, filed on Sep. 29, 2005, the disclosure of which is incorporated herein in its entirety by reference. 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a slide-type input device, a portable device provided with the input device, and a method and medium of using the input device, and more particularly to a slide-type input device, a portable device provided with the input device, and a method and medium using the input device, which can move a pointer displayed on a screen and more conveniently and exactly select a specific object. 
   2. Description of the Related Art 
   Portable devices such as a cellular phone and a personal digital assistant (PDA) are usually provided with an input device called a pointing device. A user of the portable device can move control objects such as a cursor, a pointer, and others, by operating the pointing device. 
   In case of the portable devices, a pointing device, which moves the control objects using input keys (direction keys) in the plane of a display screen, has been widely used. The pointing device detects a key input operation by the user, and converts the detected key input operation to a movement control command for controlling so that the control object can be moved in the plane of the display screen. 
   There has been greatly increased a need to be able to freely move the control objects in any direction, because applications of the portable device perform multiple functions. However, the pointing device using the direction keys has not been designed on the assumption that the control objects are to move freely in any direction. Therefore, the pointing device using the direction keys has a disadvantage in that it is not possible for the control objects to be moved in an arbitrary direction on the display screen. 
   Pointing devices, by which the control object can be moved in an arbitrary direction on the display screen, include stick type pointing devices such as a joy stick, a touch pad, a track ball, a track pointer, and others. 
   However, in small and thin portable devices, it is not desirable that the pointing device, in which a lever protrudes from a surface of a cabinet, be built in the portable device, respectively. Further, even if the protruded lever is short, the operation ability of the user is decreased, because the length of the lever is short. 
   Further, the touch pad has the disadvantage that additional equipment (e.g., a stylus pen) is required. The track ball has the disadvantage in that the portable device becomes larger. In addition, pressure operated track points are inconvenient. 
   Japan Patent Unexamined Publication No. 2004-062447 discloses a point device of a mobile terminal including a rim having a circular shape, a center key configured to be movable in an arbitrary direction of an xy plane, and Hall elements configured to detect the direction and amount of movement of the center key in the xy plane, which can enable a user to operate in an arbitrary direction (i.e., at an angle of 45 degrees) within the rim using the center key. 
   However, Japan Patent Unexamined Publication No. 2004-062447 measures a location of the central key on the xy plane by detecting the change of a magnetic flux density using the Hall elements. 
   SUMMARY OF THE INVENTION 
   Additional aspects, features, and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention. 
   Accordingly, the present invention solves the above-mentioned problems occurring in the prior art, and the present invention allows the user to more freely move a pointer displayed on a screen and more conveniently and exactly select a specific object, using a slide-type input device. 
   In another aspect of the present invention, there is provided a portable device having a slide button that can move in a specific location and select a specific object. 
   In an aspect of the present invention, there is provided a slide-type input device, which includes a slide button movable in a specific direction; a motion control hole providing a movement area of the slide button; a location-detection module detecting location information that is changed by the slide button; and a controller controlling a pointer that is displayed on a screen based on location-change information of the slide button, wherein the slide button is moved in a specific direction by an external force produced by a user, and is then returned to an original location due to an elastic force. 
   In another aspect of the present invention, there is provided a portable device provided with a slide-type input device, which includes an input unit movable in a specific direction by an external force of a user and selecting a specific object; a pointer changing a location depending on a movement direction of the input unit; and a display panel displaying the selected object from the pointer. 
   In still another aspect of the present invention, there is provided a method for using a slide-type input device; which includes a user moving a slide button in a specific direction; calculating a location and an amount change of the movement of the slide button; moving the pointer based on the calculated location and the amount of change of the movement; and an elastic force returning the slide button to an original location when the external force is removed. There is also provided a medium including computer readable instructions implementing this method. 
   In still another aspect of the present invention, there is provided a method for using a slide-type input device; which includes when a slide button is moved in a specific direction by an external force of a user, detecting movement location information of the slide button; calculating a movement location of the slide button and whether the slide button is located around a boundary of a motion control hole; calculating an amount of movement change of the slide button depending on whether it is approaches the boundary of the motion control hole in the slide button; calculating a movement location of a pointer that is displayed on a screen based on the calculated location and movement change of the slide button; and displaying the pointer at the calculated movement location. There is also provided a medium including computer readable instructions implementing this method. 
   In still another aspect of the present invention, there is provided a slide-type input device including a movable slide button; and a location-detection module detecting a location-change information according to movement of the movable slide button, wherein the location-detection module includes a connection line coupler, which has connection lines, checking the movement of the movable slide button; a restorer, coupled with the connection line coupler, returning the slide button to an original location due to an elastic force; a scale indicator, coupled with the connection line coupler, indicating a scale of a specific interval according to the movement of the movable slide button; and an optical sensor sensing a brightness change value of the scale according to the movement of the movable slide button to produce a signal corresponding to the sensed brightness change value. 
   In still another aspect of the present invention, there is provided a location-detection module detecting a location-change information according to movement of a movable slide button, wherein the location-detection module includes a connection line coupler, which has connection lines, checking the movement of the movable slide button; a scale indicator, coupled with the connection line coupler, indicating a scale of a specific interval according to the movement of the movable slide button; and an optical sensor sensing a brightness change value of the scale according to the movement of the movable slide button to produce a signal corresponding to the sensed brightness change value. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     These and/or other aspects, features, and advantages of the invention will become apparent and more readily appreciated from the following description of exemplary embodiments, taken in conjunction with the accompanying drawings of which: 
       FIG. 1  is a schematic diagram illustrating a portable device provided with a slide-type input device according to an exemplary embodiment of the present invention; 
       FIG. 2A  is a sectional diagram illustrating a slide-type input device in a portable device according to another exemplary embodiment of the present invention; 
       FIG. 2B  is an exploded perspective diagram illustrating the slide-type input device in the portable device according to another exemplary embodiment of the present invention 
       FIG. 3  is an exploded perspective diagram illustrating a location-detection module in the slide-type input device according to another exemplary embodiment of the present invention; 
       FIG. 4  is an internal block diagram illustrating the portable device provided with the slide-type input device according to another exemplary embodiment of the present invention; 
       FIG. 5  is a diagram illustrating a method for measuring a location of a slide button using a processor of a portable device provided with the slide-type input device according to another exemplary embodiment of the present invention; 
       FIG. 6  is a flowchart illustrating processes of using a slide-type input device according to still another exemplary embodiment of the present invention; and 
       FIGS. 7A through 7D  are diagrams illustrating an operating screen of a portable device provided with the slide-type input device according to still another exemplary embodiment of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Exemplary embodiments are described below to explain the present invention by referring to the figures. 
   Exemplary embodiments of the present invention will be described with reference to the accompanying drawings illustrating block diagrams and flowcharts for explaining a slide-type input device, a portable device provided with the input device and a method for using the input device according to the present invention. It will be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the functions specified in the flowchart block or blocks. These computer program instructions may also be stored in a computer usable or computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer usable or computer-readable memory produce an article of manufacture including instruction means that implement the function specified in the flowchart block or blocks. The computer program instructions may also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed in the computer or other programmable apparatus to produce a computer implemented process such that the instructions that execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. 
   Also, each block of the flowchart illustrations may represent a module, segment, or portion of code, which includes one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of order. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in reverse order, depending upon the functionality involved. 
     FIG. 1  is a schematic diagram illustrating a portable device provided with a slide-type input device according to an exemplary embodiment of the present invention. 
   Referring to  FIG. 1 , the portable device  100  includes an input device  200  and a display panel  300 . The portable device  100  can use voice and image information, and can be, for example, a mobile phone, Personal Digital Assistants (PDAs), MPEG Audio Layer-3 (MP3) player, notebook computer, Portable Multimedia Player (PMP), or a portable gaming device. An example of a mobile phone is a smart phone. The smart phone may include and/or execute program instructions such as Microsoft® Windows Mobile® program instructions or the like. 
   The input device  200  includes a slide button movable in a specific direction, which can move a pointer displayed on a screen or can select an object on which the pointer is located, by moving and selecting the slide button by an external force of a user. Herein, the term “movement of the slide button” denotes a slide button moving in a specific direction after the user applies a pressure less than a specific threshold value to the slide button. The term “selection of the slide button” denotes a slide button being pushed by a user to apply a pressure more than a specific threshold value to the slide button. In another exemplary embodiment, if the pressure applied to the slide button is equal to a specified threshold value, then there is “movement of the slide button.” In another alternative exemplary embodiment, if the pressure applied to the slide button is equal to a specified threshold value, then there is “selection of the slide button.” The input device  200  will be explained in detail with reference to  FIG. 2 . 
   The display panel  300  displays the pointer, whose location is changed according to a movement direction of the input device  200 , and the object where the pointer is located. A screen displayed on the display panel will be explained with reference to  FIG. 7 . 
   The input device  200  according to the present invention may be used instead of a mouse by mounting it in a computer keyboard. 
     FIG. 2A  is a sectional diagram illustrating a slide-type input device in a portable device according to another exemplary embodiment of the present invention.  FIG. 2B  is an exploded perspective diagram illustrating the slide-type input device in the portable device according to another exemplary embodiment of the present invention. 
   Referring to  FIG. 2A , the input device  200  includes a slide button  210 , a motion control hole  220 , a protection plate  230 , a bearing  240 , a location-detection module  250 , and a housing  260 . 
   First, a combined relationship between components of the input device  200  will be explained. 
   The slide button  210 , the motion control hole  220 , the protection plate  230 , the bearing  240 , the location-detection module  250 , all of which are located in the housing, are integrated as one body. The bearing  240  is coupled to a lower part of the slide button  210  to help the movement of the slide button  210 . 
   The location-detection module  250  is coupled to upper/lower and left/right sides of the slide button  210 . A connection line  259  is coupled between the slide button  210  and the location-detection module  250 . 
   The protection plate  230  is coupled on the circumference of the slide button  210 , and is tightly sealed with an upper plate of the housing  260 , thereby preventing foreign materials such as dust from entering the housing  260 . 
   The motion control hole  220  is located on an upper surface of the protection plate  230  to restrict the movement of the slide button  210 . 
   Functions for each component of the input device  200  will be explained in the following. 
   The slide button  210  is moved in a specific direction. For example, the slide button  210  is freely moved in any direction by a user applying a force less than a specific threshold value to the slide button  210 , and when the user tries to select a specific object, if the slide button  210  is pushed by a user applying a force more than the specific threshold value, the corresponding object can be selected. 
   The pointer displayed on the screen is moved in a direction corresponding to the movement direction or the movement location of the slide button  210 . 
   The motion control hole  220  is a hole surrounding the slide button  210 . A lower part of the motion control hole  220  is attached with the upper part of the housing  260 . Further, the motion control hole  220  restricts a movement distance of the slide button  210 . If the slide button  210  is located around a boundary of the motion control hole  220  for a specific time, the pointer displayed on the screen is continuously moved in a direction corresponding to a place where the slide button  210  is located. 
   The location-detection module  250  detects location information that is changed according to the movement of the slide button  210 . The connection lines  259  coupled with each location-detection module  250  are also connected with the slide button  210  so as to enable the moved-to location information of the slide button  210  to be detected. 
   For example, when the slide button  210  is moved in a specific direction by the external power of the user, the location-detection module  250  is rotated. Accordingly, the length of the connection lines, which are coupled to the upper/lower and left/right surfaces of the slide button  210 , is changed. 
   The location-detection module  250  detects the length of the changed connection lines  259 , thereby allowing the movement location of the slide button  210  to be detected. The location-detection module  250  will be explained in detail with reference to  FIG. 3 . 
   Referring to  FIG. 2B , when the slide button  210  is moved, the location-detection module  250  is rotated, thereby allowing the length of the connection lines coupled to the location-detection module  250  to be changed. 
   The location-detection module  250  transmits values of the changed length of the connection lines  259  to a controller by wire  270 . 
     FIG. 3  is an exploded perspective diagram illustrating a location-detection module  250  in the slide-type input device according to another exemplary embodiment of the present invention. 
   Referring to  FIG. 3 , the location-detection module  250  includes a central axis  251 , support plates  252 ,  255 , and  257 , a restoration part (restorer)  253 , a scale indicator  254 , a connection line coupling part (connection line coupler)  256 , an optical sensor  258  and a connection line  259 . In the location-detection module  250 , the central axis  251 , the support plates  252 ,  255 , and  257 , the restoration part  253 , the scale indicator  254 , and the connection line coupling part  256  are coupled as one body. 
   The connection line coupling part  256  couples the connection lines  259  for detecting the movement location of the slide button  210 . The connection line coupling part  256  is rotated about the central axis  251  while winding or unwinding the connection lines  259 . 
   For example, if the slide button  210  is moved by an external force of the user, some of the four connection lines  259  connected to the slide button  210  become lengthened, and the other connection lines are shortened. Accordingly, the connection lines  259  are wound on the connection line coupling part  256  according to the lengthening or shortening. The connection line coupling part  256  is rotated by winding or unwinding the connection lines  259 . 
   The restoration part  253  is coupled with the connection line coupling part  256  through the central axis, and is rotated in the same direction as the connection line coupling part  256  while the slide button  210  is moved. The restoration part  253  is constituted of an elastic body like a spring, so as to enable the slide button  210  to be returned to an original location due to an elastic force that acts when the external force applied by the user is removed. 
   The scale indicator  254  is coupled with the connection line coupling part  256  through the central axis, and is rotated in the same direction as the connection line coupling part  256  while the slide button  210  is moved. A scale  254   a  is indicated on an outer surface of the scale indicator  254  at a desired interval. The scale  254   a  is rotated while the scale indicator  254  is rotated. 
   When the scale indicator  254  is rotated according to the slide button moved by the user, the optical sensor  258  detects a value, to which the brightness of the scale  254   a  is changed, to produce a signal corresponding to the changed value. 
   For example, if a brightness value and a darkness value are alternately checked by the rotation of the scale indicator  254  and the scale  254   a , the optical sensor  258  detects either the brightness value or the darkness value to produce a signal corresponding to the detected value. 
     FIG. 4  is an internal block diagram illustrating the portable device provided with the slide-type input device according to another exemplary embodiment of the present invention. 
   Referring to  FIG. 4 , the portable device  100  includes a signal input unit  110 , a signal-check unit  120 , a processor  130 , a pointer-location detection unit  140 , a storage unit  150 , a display unit  160 , and a controller  170 . 
   In the exemplary embodiment of the present invention, the term “unit”, as used herein, denotes, but is not limited to, a software or hardware component, such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC), which performs certain tasks. A unit may advantageously be configured to reside in the addressable storage medium and configured to execute on one or more processors. Thus, a unit may include, by way of example, components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functionality provided for in the components and units may be combined into fewer components and units or further separated into additional components and modules. In addition, the components and units may be implemented so as to execute one or more CPUs in a device. 
   The signal input unit  110  receives a movement signal and a selection signal of the slide button  210 , all signals of which are produced by the user. 
   If a certain signal produced by the user is inputted to the signal-check unit  120  by the signal input unit  110 , the signal-check unit  120  checks whether the inputted signal is the movement signal or the selection signal of the slide button  210 . 
   As a result, if the inputted signal is the movement signal of the slide button  210  (i.e., a brightness change value of the scale detected by the optical sensor  258 ), the movement signal of the slide button  210  is transmitted to the processor  130 . If the inputted signal is the selection signal of the slide button  210  (e.g., the case where the pressure is more than the specific threshold value given to the slide button), the selection signal is transmitted to the processor  130 . 
   The processor  130  calculates a location and a change of volume of the movement of the slide button  210  based on a signal that corresponds to the changed value of the scale transmitted from the signal-check unit  120 . The processor  130  also calculates a location of the movement of the pointer and whether the pointer approaches the boundary of the motion control hole  220 . 
   A method of calculating the location and the change volume of the movement of the slide button  210  as well as the location of the movement of the pointer will be explained with reference to  FIG. 5  in the following. 
   For example, it is assumed that if the center of the motion control hole  220  is “O”, four points where the connection lines  259  intersect in the upper plate  260   a  are respectively A, B, C and D, a length of a line segment OA is “a”, a length of a line segment OB is “b”, a length of a line segment OC is “c”, and a length of a line segment OD is “d”. In this case, since “O” is located at the center of the motion control hole  220 , a=c, and b=d. 
   First, a(t), b(t), c(t) and d(t), the length of four connection lines  259 , are measured from length changes of the connection lines  259  or a length change of the restoration part  253  at time (t). 
   Next, it is assumed that if a coordinate of the center of the slide button  210  is (x(t), y(t)) at time (t), angle PAC is θ(t), angle PCA is δ(t), and the coordinate of “O” is (0, 0). 
   In this case, x(t) is expressed by Equation 1:
 
 x ( t )= a−a ( t )cos θ( t )=− a+c ( t )cos δ( t )[
 
   Using the second law of cosines, Equation 1 can be represented as: 
   
     
       
         
           
             
               
                 
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   At time (t+1), the changed volume of x(t) and y(t) is expressed by Equation 3:
 
Δ x ( t +1)= x ( t +1)− x ( t )
 
Δ y ( t +1)= y ( t +1)− y ( t )
 
   In other words, if the volume at time (t) is subtracted from that of time (t+1), the changed volume of x(t) and y(t) may be obtained. 
   The movement location of the pointer located on the screen is obtained by Equation 4:
 
 X ( t +1)= X ( t )+Δ x ( t +1) Yk   1  
 
 Y ( t +1)= Y ( t )+Δ yx ( t +1) Yk   2  
 
where X(t) and Y(t) denote a present location of the pointer, Δx(t+1) and Δy(t+1) denote the changed volume of the movement of the slide button  210 , and k 1  and k 2  denote arbitrary constants.
 
   Further, a method of checking whether the slide button  210  is located around the boundary of the motion control hole  220  is performed using Equation 5:
 
 a   2 ( t )+ c   2 ( t ) E 4 a   2 −ε 1  
 
 b   2 ( t )+ d   2 ( t ) E 4 b   2 −ε 2  
 
where each of ε 1  and ε 2  is a boundary margin. If the slide button  210  is located around the boundary of the motion control hole  220 , a boundary arrival speed, i.e., each value of Δx(t) and Δy(t) is stored in the storage unit  150 , and the pointer is continuously moved by the stored values. Further, even though a central point of the slide button  210  is not located on the boundary of the motion control hole  200 , it is decided that the central point of the slide button  210  shall be located on the boundary of the motion control hole  200  considering the boundary margin, even in the case where the central point thereof is located around the boundary of the motion control hole  200 .
 
   The pointer detection unit  140  detects the pointer&#39;s location displayed on the screen in order to move the pointer location based on the slide button&#39;s location, which is calculated by the processor  130 . 
   The storage unit  150  stores the moved-to location of the pointer, which is calculated by the processor  130 . 
   The display unit  160  displays the pointer, whose location is changed by the movement of the slide button  210 , and the object selected by the pointer. 
   The controller  170  controls function blocks  110 ,  120 ,  130 ,  140 ,  150  and  160  of the portable device  100 . The controller  170  can be considered a type of processor. 
     FIG. 6  is a flowchart illustrating processes of using a slide-type input device according to still another exemplary embodiment of the present invention. 
   First, if a signal produced by the user is inputted to the signal-check unit  120  through the signal input unit  110 , the signal-check unit  120  checks whether the inputted signal is a movement signal or a selection signal of the slide button  210  (S 600 ). For example, if the inputted signal is the movement signal of the slide button  210 , a signal that corresponds to a brightness change value of the scale detected by the optical sensor  258  is inputted to the controller  170 . If the inputted signal is the selection signal, a signal that corresponds to a pressure value more than the specific threshold value is inputted to the controller  170 . 
   As a result of the checking, if the slide button  210  is moved (S 610 ), the signal-check unit  120  detects the pressure of the slide button  210  again. In the case where the pressure value of the slide button  210  is included within a constant threshold range, the signal-check unit  120  transmits the movement signal to the controller  170 , the movement signal being the signal that corresponds to the brightness change value of the scale detected by the optical sensor  258 . The control unit  170  transmits the movement signal transmitted by the signal-check unit  120  to the processor  130 . This enables the pointer on the screen to move only when the slide button  210  is moved by the user&#39;s finger, and does not enable the pointer on the screen to move while the slide button  210  is returned to the original location by taking off the user&#39;s finger from the button  210 . 
   Hereafter, a process of detecting the changed value of the scale brightness using the optical sensor will be explained. 
   First, if the slide button  210  is moved in the specific direction by the external force applied by the user, each length of the connection lines connected to the slide button  210  in four directions is differently changed. 
   Next, four location-detection modules  250  coupled with four connection lines  259  are rotated by winding or unwinding four connection lines. When the location-detection modules  250  are rotated, the scale indicator  254  in the location-detection module  250  is simultaneously rotated, and thus the scale indicated in the scale indicator  254  is also rotated. 
   The optical sensor  258  detects a brightness change value of the scale that is simultaneously rotated with the scale indicator  254 , and generates a signal corresponding to the detected brightness change value of the scale. The generated signal is inputted via the signal input unit  110 . 
   The processor  130  calculates a movement location of the slide button  210  based on the movement signal (i.e., brightness change value of the scale) transmitted by the controller  170  (S 620 ). The movement location of the slide button  210  is calculated using Equations 1 and 2. 
   The processor  130  also judges whether the slide button  210  is located around the boundary of the motion control hole  220 . The decision is using Equation 5. 
   As a result of the judgment, if the slide button  210  is located around the boundary of the motion control hole  220  (S 630 ), the processor  130  calculates the movement volume change of the slide button  210  (S 640 ). 
   The controller  170  calculates a location of the pointer that is displayed on the screen based on the calculated location and volume change of the movement of the slide button  210  (S 650 ). The location of the pointer is obtained by Equation 4. 
   The controller  170  controls the display unit  160  for displaying the pointer moved to the location calculated by Equation 4 (S 660 ). The pointer is continuously moved in the movement direction of the slide button  210 . 
   As a result of the checking of whether an input signal is movement signal or selection signal of slide button (S 600 ), if the inputted signal by the signal input unit  110  is the selection signal of the slide button  210  (S 610 ), the controller  170  checks the location of the pointer that is stored in the storage unit  150 , and controls the display unit  160  so as to enable a specific object selected by the checked pointer to be displayed on the screen (S 680 ). 
   As a result of the judgment (S 630 ), if the slide button  210  is not located around the boundary of the motion control hole  220  (S 630 ), the processor calculates the movement volume change of the slide button  210  moved by the external force applied by the user (S 670 ), and calculates the movement location of the pointer based on the calculated movement volume change (S 650 ). 
   Accordingly, the user can easily operate the pointer by using the slide button  210  that moves the pointer to a desired location on the screen to select a desired object. 
     FIG. 7  is a diagram illustrating an operating screen of a portable device provided with the slide-type input device according to still another exemplary embodiment of the present invention. 
   Referring to  FIGS. 7A through 7D , the pointer  310  and the desired objects are displayed on the display panel  300  of the portable device, where the pointer  310  is moved according to the movement location and the movement volume change of the input device. 
   As shown in  FIG. 7A , when the slide button  210  is moved in an upper-left direction by the external force applied by the user, the pointer  310  displayed on the display panel is moved in the same direction as the slide button  210 . The movement location of the pointer  310  is calculated based on the movement location and the movement volume change of the slide button  210  so as to move the pointer to a corresponding location. 
   As shown in  FIG. 7B , when the user moves the slide button  210  in multiple directions, the pointer  310  displayed on the display panel  300  is moved in the same direction as the slide button  210 . 
   As shown in  FIG. 7C , the user locates the slide button  210  around the boundary of the motion control hole  220 . At this time, if the slide button  210  is located around the boundary of the motion control hole  220  for a certain period of time, the pointer  310  is continuously located in a direction corresponding to the location that the slide button  210  is contact with the boundary of the motion control hole  220 . 
   As shown in  FIG. 7D , the slide button  210  is selected by the external force of the user. In other words, when the pointer is located on the specific object, if the user creates more pressure than the specific threshold value by applying a force to the slide button, the object, on which the pointer  310  is located, is selected and displayed on the display panel  300 . The object may be represented on a display by an icon, text, and the like, for example. 
   Accordingly, since the operations of the slide-type input device  200  are similar to those of the mouse, the user can easily move the pointer in the desired direction, and conveniently select the desired object. 
   Meanwhile, if the external force applied by the user is removed, the slide button  210  is returned to the original location by the elastic force created by the restoration part  253 . At this time, the pointer  310  on the screen does not move because the pressure given in the slide button  210  is lower than the constant threshold value. 
   The slide button  210  may be separated into a plurality of slide buttons. When the slide button  210  is separated into left/right sides, if the user selects the left side of the slide button  210 , some of the operations of the slide button  210  are performed, and if the user selects the right side of the slide button  210 , the other operations of the slide button  210  are performed. 
   As describe above, the slide-type input device, the portable device provided with the input device, and the method of using the input device, according to the present invention, produce the following effects. 
   First, the slide-type input device can more freely move the pointer displayed on the screen, and more conveniently and exactly select the specific object. 
   Second, a correct coordinate, in which the slide button is moved, can be obtained by changing the lengths of the connection lines connected to the location-detection module. 
   Third, an instinctive and convenient input device is provided to the user, by freely moving the slide button within the motion control hole. 
   Fourth, the slide-type input device has functions and applications similar to the conventional mouse, thereby allowing the user to conveniently use it. 
   Fifth, the size of the slide-type input device is smaller than that of the conventional point device, thereby allowing the portable device to be smaller and thinner. 
   Although a few exemplary embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.