KR100707180B1 - Method and apparatus for searching file - Google Patents

Abstract

The present invention relates to a method and a device for searching a file, and more particularly, to a method and a device for searching a file by an icon hierarchically activated on a depth axis of a display unit according to a sensed pressure.

According to an embodiment of the present invention, an apparatus for searching a file through an icon displayed on a display unit may include: an icon displayed hierarchically on the depth axis of the display unit to have a predetermined hierarchical value; And a memory for storing the icon and the hierarchical value corresponding to the icon.

Description

Method and apparatus for searching file

1 is a functional block diagram of a file retrieval apparatus according to an embodiment of the present invention.

2 is a functional block diagram of a file retrieval apparatus corresponding to another embodiment of the present invention.

3 illustrates icons hierarchically displayed on the display unit.

4 illustrates icons that are hierarchically activated and icons that are not activated.

5 illustrates the activation speed of icons hierarchically activated according to the sensed pressure.

6 illustrates an activation speed of an icon hierarchically activated in a first direction on the depth axis of the display unit or in a direction opposite to the first direction according to the sensed pressure.

Figure 7 shows a functional block diagram of a remote controller corresponding to one embodiment of the present invention.

Figure 8 illustrates the control operation of a one-hand controllable remote controller, corresponding to one embodiment of the invention.

9 shows a flowchart of a file retrieval method corresponding to one embodiment of the present invention.

10 is a flowchart illustrating a method of controlling an activation speed of an icon according to the detected pressure level in more detail.

11 is a flowchart illustrating a method of setting a hierarchical value of an icon in more detail.

The present invention relates to a method and a device for searching a file, and more particularly, to a method and a device for searching a file by an icon hierarchically activated on a depth axis of a display unit according to a sensed pressure.

The number of files used by users in the information age is increasing exponentially. When activating icons on the display for hundreds to thousands of files to search for a given file, it is not easy to display them all on one screen. Thus, users use scrolling or folders to efficiently manage and search large numbers of files.

However, when searching a file using a folder, the directory structure of the file is complicated, and there is a lack of visual feedback on the relationship between the previous folder and the current folder. Beginners who do not understand the directory structure can find the folder of the file they saved. To spend a lot of time and effort. On the other hand, if a file is searched while selecting one upper directory and moving to a lower folder, the lower folder of the other upper directory cannot be searched, so the selection of the upper directory at the time of file search determines the success of the file search.

Also, when searching for files by scrolling. It is difficult to learn the concept, and it is inconvenient to operate only with the pointer.

An object of the present invention is to provide an apparatus for searching a file by hierarchically activating an icon for a file hierarchically according to an input signal on a depth axis of a display unit.

Another object of the present invention is to provide a method for searching a file by hierarchically activating an icon for a file hierarchically according to an input signal on a depth axis of a display unit.

Another object of the present invention is to provide a remote controller for searching a file through a predetermined icon displayed hierarchically on a depth axis of a display unit included in the file searching apparatus.

In order to achieve the above technical problem, an apparatus for searching a file through an icon displayed on a display unit has a predetermined hierarchical value, and displays an icon hierarchically displayed to correspond to the hierarchical value on a depth axis of the display unit. And a memory for storing the icon and the hierarchical value corresponding to the icon.

Preferably, the searcher of the file searching apparatus hierarchically displays the icon on the depth axis of the display unit according to a first determiner that determines whether a magnitude of the input signal is greater than or equal to a first threshold and an input signal that is greater than or equal to the first threshold. Characterized in that it comprises an activator to activate.

Preferably, the searcher of the file search apparatus further includes a second determiner that determines whether a magnitude of the input signal is greater than or equal to a predetermined second threshold, and the activation unit hierarchies the icon in a first direction on a depth axis of the display unit. And activate the icon hierarchically in a direction opposite to the first direction according to an input signal between the first threshold value and the second threshold value, wherein the first threshold value is greater than the second threshold value. It is characterized by a larger one.

Preferably, the search unit of the file search apparatus increases an activation speed of an icon hierarchically activated in the first direction according to an input signal size equal to or greater than the first threshold value, and the first threshold value and the second threshold value. The apparatus may further include a speed controller configured to increase an activation speed of an icon that is hierarchically activated in a direction opposite to the first direction according to an input signal magnitude between values.

Preferably, the file search apparatus sets an input unit for generating a signal for searching for the icon, a selection unit for selecting the activated icon, and a hierarchical value of the selected icon and the unselected icon, and the hierarchical value of the set icon. It further comprises a setting unit for storing in the memory unit, The input unit is characterized in that the pressure sensor for generating an electrical signal corresponding to the sensed pressure.

According to an aspect of the present invention, there is provided a method of searching for a file through an icon displayed on a display unit, wherein a signal for searching for the icon is input and having a predetermined hierarchical value. And searching for an icon hierarchically displayed correspondingly to the magnitude of the input signal.

Preferably, the searching step includes determining whether the magnitude of the input signal is greater than or equal to a predetermined first threshold value (step a) and activating the icon hierarchically on a depth axis according to the input signal greater than or equal to the first threshold value. (b step).

Preferably, the searching step further includes the step (c) of determining whether the magnitude of the input signal is greater than or equal to a predetermined second threshold value, and the step (b) includes displaying the display according to the input signal equal to or greater than the first threshold value. Activating the icon hierarchically in a first direction on a negative depth axis, hierarchically activating the icon in a direction opposite to the first direction according to an input signal between the first and second threshold values, The first threshold is greater than the second threshold.

Preferably, the file search method according to the present invention includes the steps of selecting the activated icon (step d), setting a hierarchical value of the selected icon and an unselected icon (step e), and the hierarchical value of the set icon. It further comprises the step of storing (step f).

In order to achieve the above technical problem, the remote controller for searching a file through a predetermined icon displayed on the display unit of the file search device is a pressure sensing unit for detecting a pressure, and generates an electrical signal corresponding to the detected pressure, A selection unit for generating a selection signal for selecting an icon displayed on the display unit hierarchically or semi-hierarchically corresponding to the magnitude of the electric signal, and a transmission for transmitting the selection signal and the electric signal to the file retrieval device It is characterized by including a wealth.

Hereinafter, a file searching apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram of a file retrieval apparatus according to an embodiment of the present invention. Referring to FIG. 1, a file search apparatus according to the present invention includes an input unit 110, a search unit 120, a memory unit 130, a setting unit 140, a selection unit 150, and a display unit 160. Doing.

The input unit 110 generates a signal for searching for an icon activated on the display unit 160. Preferably, the input unit 110 is a pressure sensor for detecting a pressure and generating an electrical signal corresponding to the sensed pressure level. Depending on the field to which the present invention is applied, other types of input unit 110 may be used, which is within the scope of the present invention.

The searcher 120 searches for and activates an icon that is hierarchically displayed according to the hierarchical value on the depth axis of the display unit 160 having a predetermined hierarchical value corresponding to the size of a predetermined input signal. The icon is an indicator that visually represents the content stored in the predetermined file. For example, a poster of the video may be used as an icon for a predetermined video file.

The searcher 120 includes a first determiner 122, a speed controller 124, an activator 126, and an initialization unit 128, and the first determiner 122 includes the input unit 110. It is determined whether the magnitude of the input signal inputted at) is greater than or equal to the first threshold value TH1. The speed controller 124 controls the activation speed of the icon activated through the activation unit 126 according to the magnitude of the input signal equal to or greater than the first threshold value TH1. For example, the speed controller 124 may control the activation speed of the icon to increase in proportion to the magnitude of the input signal equal to or greater than the first threshold value TH1. The activator 126 sequentially searches the icons stored in the memory unit 130 and the hierarchical values set in the icons in a high order, and hierarchically activates the retrieved icons according to the hierarchical values of the icons. . The activated icons are displayed in a hierarchical order according to the hierarchical value of the icons in the first direction on the depth axis of the display unit 160. On the other hand, the initialization unit 128 initializes the display unit 160 to an initial search screen when the magnitude of the input signal determined by the first determination unit 122 is less than the first threshold value TH1. .

The selection unit 150 selects an icon activated on the display unit 160 through the activation unit 126, and a file linked to the selected icon is executed through a predetermined processor (not shown). Meanwhile, the selector 150 notifies the set icon 140 of the selected icon, and the setter 140 may select the selected icon and the memory based on the number of times the selected icon is selected or the date on which the icon is selected. Sets the hierarchical value of the unselected icon that is stored. Preferably, the setting unit 140 increases the hierarchical value of the selected icon to an upper layer and decreases the hierarchical value of the unselected icon to a lower layer.

2 is a functional block diagram of a file retrieval apparatus corresponding to another embodiment of the present invention. Referring to FIG. 2, the file search apparatus includes an input unit 210, a search unit 220, a memory unit 230, a setting unit 240, a selection unit 250, and a display unit 260. The input unit 210, the memory unit 230, the setting unit 240, the selecting unit 250, and the display unit 260 of the file searching apparatus illustrated in FIG. 2 are an input unit of the file searching apparatus illustrated in FIG. 1. The same operation as the operation unit 110, the memory unit 130, the setting unit 140, the selection unit 150, and the display unit 160 is performed. Hereinafter, the search unit 220 of the file search apparatus according to another embodiment of the present invention will be described with reference to FIG. 2.

The search unit 220 includes a first determination unit 222, a second determination unit 224, a speed control unit 226, an activation unit 228, and an initialization unit 229. The first determination unit 222 determines whether the magnitude of the input signal input through the input unit 210 is greater than or equal to a predetermined first threshold value TH1. On the other hand, the second determination unit 224 determines whether the magnitude of the input signal input through the input unit 210 is greater than a predetermined second threshold value TH2 and smaller than the first threshold value TH1. According to the field to which the present invention is applied, the first determiner 222 and the second determiner 224 may be integrated into one, which is within the scope of the present invention.

The speed controller 226 controls the activation speed of the icon activated through the activation unit 228 based on the determination result of the first determination unit 222 and the second determination unit 224. When the magnitude of the input signal determined by the first determiner 222 and the second determiner 224 is greater than the first threshold value, the speed controller 226 is configured to have a depth axis of the display unit 260. Control the activation speed of the icon that is activated hierarchically in the first direction. On the other hand, if the magnitude of the input signal determined by the first determination unit 222 and the second determination unit 224 is smaller than the first threshold value and larger than the second threshold value, the speed controller 226 determines the Controls the activation speed of the icon hierarchically activated in the direction opposite to the first direction. For example, an activation speed of an icon hierarchically activated in a first direction is increased in proportion to an input signal magnitude greater than or equal to the first threshold value, and is increased in an input signal magnitude between the first threshold value and the second threshold value. In proportion, the activation speed of the icon hierarchically activated in the direction opposite to the first direction is increased.

The initialization unit 229 initializes the display unit 260 as an initial search screen when it is determined through the second determination unit 224 that the magnitude of the input signal is less than the second threshold value TH2.

3 illustrates icons hierarchically displayed on the display unit. Icons for a plurality of video files are hierarchically displayed on the depth axis of the display unit according to the hierarchical value of the icon set based on the number of times or the date selected by the user. Preferably, icons of files similar to the director, actor, video file types, etc. may be disposed in close proximity to form a group, and a plurality of groups may be simultaneously displayed on the display unit. The position at which the icon having the n-th hierarchical value is displayed is displayed so as not to overlap with the n-1 th displayed icon, based on the position at which the icon having the n-th hierarchical value is displayed.

4 illustrates an icon that is hierarchically activated. Icons for the file are hierarchically activated on the depth axis 400 of the display portion. The first activated icon 410 has a high hierarchical value, the second activated icon 420 has a medium hierarchical value, and the third activated icon 430 is the first and second icon It has a lower hierarchical value than 410 and 420. When an input signal equal to or greater than the first threshold value TH1 is input, third icons hierarchically from the first icon are activated in the first direction on the depth axis of the display unit. On the other hand, when an input signal equal to or less than the first threshold value TH1 or more than the second threshold value TH2 is input, the third icon to the first icon are activated in a direction opposite to the first direction. The activated icon 420 is displayed clearly and darkly, and the icon 410 which is already activated is gradually displayed brightly and transparently and disappears. On the other hand, the icon 430 to be displayed in the future is only dark and faint outline is displayed. Depending on the field to which the present invention is applied, the icon may be activated in other ways, which is within the scope of the present invention.

5 illustrates the activation speed of icons hierarchically activated according to the sensed pressure. According to an embodiment of the activation speed of the icon shown in FIG. 5A, the icons are activated at a constant speed from the time when the pressure equal to or greater than the first threshold value TH1 is input. Another embodiment of the activation speed of the icon shown in (b) of FIG. 5 is that icons are activated from a time point at which a pressure equal to or greater than a first threshold value TH1 is input, and a predetermined step increases as the pressure increases. As the icon's activation speed increases. For example, the icons are activated at a low speed when a pressure equal to or greater than the first threshold value TH1 is input, and the icons are activated at medium speed or high speed as the pressure greater than the first threshold value TH1 is increased. Another embodiment of the activation speed of the icon shown in (c) of FIG. 5 is that the icons are activated from the time point at which the pressure equal to or greater than the first threshold value TH1 is input, and the pressure equal to or greater than the first threshold value TH1. The icon's activation speed increases in proportion.

6 shows the activation rate of an icon that is activated hierarchically or semi-hierarchically depending on the magnitude of the sensed pressure. Icons are hierarchically activated in a first direction from a time point when a pressure equal to or greater than a first threshold value TH1 is input, and an activation speed of the hierarchically activated icons is proportional to the size of the first threshold value TH1. Increases. Meanwhile, when a pressure between the first threshold value TH1 and the second threshold value TH2 is input, icons are hierarchically activated in a direction opposite to the first direction, and hierarchically in a direction opposite to the first direction. The activation speed of the activated icon increases in proportion to the second threshold value TH2. Preferably, when a pressure equal to or less than the second threshold value TH2 is input, the display initializes the search initial screen.

FIG. 7 shows a functional block diagram of a remote controller for searching for a file via a predetermined icon displayed on a display of a file searching apparatus, corresponding to an embodiment of the present invention. Referring to FIG. 7, the remote controller according to the present invention includes a pressure detector 710, a selector 720, a signal generator 730, and a transmitter 740. The pressure detector 710 detects a pressure input through a user's hand. Through the selection unit 720, a user command for selecting an icon displayed on the depth axis of the display unit hierarchically corresponding to the sensed pressure level is input. Preferably, the operation direction axis of the pressure sensing unit 710 and the operation direction axis of the selection unit 720 are perpendicular to each other to prevent crosstalk between a user's pressure input operation and the selection operation. It is arranged.

Meanwhile, the signal generator 730 generates a selection signal for selecting an icon according to the user command and a pressure signal according to the sensed pressure level. In a predetermined memory unit (not shown), a pressure signal corresponding to the magnitude of the pressure signal or a pattern of a selection signal corresponding to each key panel of a selection unit for inputting the user command is stored. For example, the activation speed of the icon is classified into high speed, medium speed, and low speed according to the size of the pressure signal, and the memory unit stores patterns of pressure signals for the high speed, the medium speed, and the low speed. Based on the pattern of the pressure signal and the selection signal stored in the memory, the signal generator 730 generates a signal corresponding to the sensed pressure magnitude and the key panel of the selection unit for inputting a user command. The signal generated by the signal generator 730 is transmitted to the file search apparatus through the transmitter 740.

Fig. 8 illustrates the control operation of a one hand controllable remote controller corresponding to the present invention. FIG. 8A illustrates a control operation of the selection unit 720 of the remote controller, and FIG. 8B illustrates a control operation of the pressure sensor 710 of the remote controller. Preferably, the selector 720 is disposed at the top of the remote controller, and the pressure sensor 710 is disposed at the bottom of the remote controller. In addition, the operation direction axes of the selection unit 720 and the pressure sensing unit 710 are disposed perpendicular to each other. The selector 720 may be controlled with a thumb, and the pressure sensor 710 may be controlled with an index finger. Therefore, the remote controller according to the present invention can be controlled by one hand.

9 shows a flowchart of a file retrieval method corresponding to one embodiment of the present invention. Referring to FIG. 9, a pressure signal for searching for an icon for a predetermined file is input (step 910), and the magnitude of the input pressure signal is determined (step 920). The speed for activating the icon is determined according to the determined magnitude of the pressure signal (step 930). The speed for activating the icon may be activated at a constant speed with respect to a pressure level greater than or equal to the first threshold value TH1, and may be increased in proportion to the size of the determined pressure signal. In a preferred embodiment of the present invention, the activation speed of the icon may be activated at a constant speed with respect to the pressure magnitude between the first threshold value TH1 and the second threshold value TH2 or may be increased in proportion to the pressure magnitude. According to the determined activation speed of the icon, the icons are hierarchically activated so that the icons do not overlap each other in the order of the hierarchical values of the icons (step 940). The activated icons are displayed vividly and boldly on the display, while icons that are not activated, having a hierarchical value near the hierarchical value of the activated icon, are faintly blurred or darkly and faintly displayed.

According to a user command for selecting an icon, the activated icon is selected (step 950), and the hierarchical value of the selected icon and the hierarchical value of the unselected icon are newly set and stored (step 960). Based on the number of times the icon is selected or the date of selection, the hierarchical value of the icon with the highest number of times or recently selected is set to a higher layer.

10 is a flow chart that describes in more detail the steps of determining the activation rate of the icon (steps 930 and 940) according to the sensed pressure level. Referring to FIG. 10, it is determined whether the magnitude of the input pressure signal is larger than the first threshold value TH1 (step 1010). If the magnitude of the pressure signal is smaller than the first threshold value TH1, it is determined whether the magnitude of the pressure signal is greater than the second threshold value TH2 (step 1020). According to the magnitude of the pressure signal determined in steps 1010 and 1020, when the magnitude of the pressure signal is greater than the first threshold value TH1, the icon is hierarchically activated in the first direction on the depth axis of the display unit. The speed at which the icon is hierarchically activated in a direction opposite to the first direction when the magnitude of the pressure signal is smaller than the first threshold value TH1 and larger than the second threshold value TH2. Determine (step 1030). The icon is hierarchically activated according to the determined icon activation speed (step 1040). On the other hand, if the magnitude of the pressure signal is less than the second threshold value TH2 through step 1020, the process returns to the initial search state (step 1050).

11 is a flowchart illustrating a method of setting a hierarchical value of an icon in more detail. It is determined whether a user command for setting the selected icon to the highest hierarchical value has been input (step 1110). When a user command for setting the selected icon to the highest hierarchical value is input, the selected icon is set to the highest hierarchical value (step 1120). You can fix the hierarchical value of an icon that you use frequently or an icon that you want to keep using as the highest layer value.

In step 1110, if it is determined that a user command for setting the hierarchical value of the selected icon to the highest value is not input, the hierarchical value Zi of the selected icon is set by Equation (1) below.

[Equation 1]

Zi = Zi-b, where b is the positive coefficient determined by the experiment.

Meanwhile, the hierarchical value Zi of the non-selected icon except for the selected icon is set by Equation 2 below.

[Equation 2]

Zi = Zi + a, where a is a positive coefficient determined by experiment. The hierarchical value of the icon set by the steps 1110 to 1140 is stored in the memory, and the icon for the predetermined file is searched using the hierarchical value of the newly stored icon.

Meanwhile, the above-described embodiments of the present invention can be written as a program that can be executed in a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium.

The computer-readable recording medium may be a magnetic storage medium (for example, a ROM, a floppy disk, a hard disk, etc.), an optical reading medium (for example, a CD-ROM, DVD, etc.) and a carrier wave (for example, the Internet). Storage medium).

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The file searching method and apparatus according to the present invention can search a file visually easily by searching the file through an icon displayed hierarchically on the depth axis of the display unit.

In addition, the file search method and apparatus according to the present invention can search files hierarchically by the magnitude of the pressure detected by the pressure sensor, and can control the search speed according to the magnitude of the pressure. This makes it easy and quick to search for files.

 In addition, the file searching method and apparatus according to the present invention can display a large number of icons easily by distinguishing the icons hierarchically in a three-dimensional space, that is, the depth axis of the display unit.

In addition, the file search method and apparatus according to the present invention returns to the initial search state when the pressure detected by the pressure sensor is less than or equal to the second threshold value TH2, thereby reducing the mental burden that the user feels when the search fails and retrying. This makes it easy to find files even in complex file structures.

Claims (23)

In the device for searching a file through the icon displayed on the display, A search unit for searching for an icon hierarchically displayed according to the hierarchical value on the depth axis of the display unit according to a magnitude of a predetermined input signal having a predetermined hierarchical value; And And a memory unit which stores the icon and a hierarchy value corresponding to the icon. The method of claim 1, wherein the search unit A first determination unit determining whether the magnitude of the input signal is greater than or equal to a predetermined first threshold value; And And an activator for hierarchically activating the icon hierarchically on the depth axis of the display unit according to the input signal of the first threshold value or more. The method of claim 2, wherein the search unit A second determination unit determining whether the magnitude of the input signal is greater than or equal to a second predetermined threshold; The activation unit hierarchically activates the icon in a first direction on a depth axis of the display unit according to an input signal equal to or greater than the first threshold value, and the first activation value according to an input signal between the first threshold value and the second threshold value. Activate the icon hierarchically in the direction opposite to 1, And wherein the first threshold is greater than the second threshold. The method of claim 3, wherein the search unit The activation speed of the icon hierarchically activated in the first direction is increased according to the input signal size of the first threshold value or more, and the first signal according to the input signal size between the first threshold value and the second threshold value. And a speed controller for increasing an activation speed of an icon hierarchically activated in a direction opposite to the direction. The apparatus of claim 4, wherein the activation speed is hierarchically classified into high speed, medium speed, and low speed according to the magnitude of the input signal. The method of claim 2, And an input unit for generating the input signal for searching the icon. The method of claim 6, And the input unit is a pressure sensor for generating an electrical signal corresponding to the sensed pressure. The method of claim 7, wherein And a pressure equal to or less than the second threshold value is input through the pressure sensor, and the file search apparatus is returned to the initial search state. The method of claim 8, A selection unit for selecting the activated icon; And And a setting unit configured to set hierarchical values of selected icons and non-selected icons, and store hierarchical values of the set icons in the memory unit. The method of claim 9, wherein the hierarchical value of the icon is And searching based on any one of the number of times or the date of selection of the icon selected by the selection unit. In the method for searching a file through an icon displayed on the display unit, Inputting a signal for searching for the icon; And And searching for an icon hierarchically displayed according to the hierarchical value on the depth axis of the display unit according to the magnitude of the input signal having a predetermined hierarchical value. 12. The method of claim 11, wherein said searching step (a) determining whether the magnitude of the input signal is greater than or equal to a first predetermined threshold; And and (b) hierarchically activating the icon in a first direction on a depth axis of the display unit according to an input signal equal to or greater than the first threshold value. The method of claim 12, wherein said searching step (c) determining whether the magnitude of the input signal is greater than or equal to a second predetermined threshold; In the step (b), the icon is hierarchically activated in a first direction on a depth axis of the display unit according to an input signal equal to or greater than the first threshold value, and the input signal between the first threshold value and the second threshold value is applied. Accordingly, activating the icon hierarchically in a direction opposite to the first direction, Wherein the first threshold is greater than the second threshold. The method of claim 13, wherein the input signal is an electrical signal corresponding to a sensed pressure, and the input signal is returned to an initial search state when the electrical signal is less than or equal to a second threshold value. The method of claim 13, wherein step (b) Determining an activation speed of an icon hierarchically activated in the first direction or in a direction opposite to the first direction according to the input signal; And And activating the icon according to the determined activation rate. The method of claim 15, wherein the activation rate is And classifying the file into hierarchical, high and low speed hierarchically according to the magnitude of the input signal. The method of claim 13, (d) selecting the activated icon; (e) setting hierarchical values of the selected icon and the unselected icon; And (f) storing the hierarchical value of the set icon. 18. The method of claim 17, wherein step (e) Setting a hierarchical value of the selected icon to a higher layer by a predetermined hierarchical value; And And setting a hierarchical value of the unselected icon as a lower layer by a predetermined hierarchical value. The method of claim 18, wherein the hierarchical value of the set icon is And searching based on any one of a number of times of selecting the selected icon or a date of selection. 19. The method of claim 18, wherein step (e) And fixing the hierarchical value of the selected icon to a highest hierarchical value by a user command. A computer-readable recording medium having recorded thereon a program for executing the method according to any one of claims 11 to 20 on a computer. In the remote control for searching for a file via a predetermined icon displayed on the display unit of the file search device, A pressure sensing unit for sensing a pressure; A selection unit for inputting a user command to select an icon hierarchically displayed in a first direction on a depth axis of the display unit or in a direction opposite to the first direction according to the sensed pressure magnitude; A signal generator for generating a selection signal for selecting an icon according to the user command and a pressure signal according to the sensed pressure level; And And a transmission unit for transmitting the selection signal and the pressure signal to the file retrieval device. The method of claim 22, And the operating direction axis of the pressure sensing unit and the operating direction axis of the selection unit are disposed perpendicular to each other.

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