KR100883174B1 - Display control method of terminal having capacitive sensor - Google Patents

Abstract

A display control method of a terminal having a pressure sensor type input pad is provided to control the movement or zooming of a displayed image by measuring the pressure on the input pad applied by a user, and then using the measured pressure value. A position sensing unit of a terminal detects the position of a sensing point where the electrostatic capacity is changed, periodically according to the generation of internal clocks(S11). A pressure detection part and a pressure calculating unit measure the pressure at the location in which the electrostatic capacity is changed(S13). A display controller determines whether the position value is changed in a digital signal inputted from the position sensing unit(S15). If the position value is changed, the display controller measures the change direction, movement distance, and moving speed(S17). The display controller determines whether the measured pressure is a preset reference value or greater(S19). If not, the display controller controls a display unit so as to move the displayed image in the measured direction based on the movement distance and moving speed(S21).

Description

Display control method of terminal having pressure sensor type input pad

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control method of a terminal having a pressure sensor type input pad. In particular, the user measures the pressure applied to the pressure sensor type input pad and moves or zooms the displayed image using the same. The present invention relates to a display control method of a terminal having a pressure sensor type input pad that makes the operation of the terminal simpler.

As is well known, handheld-based terminals (hereinafter referred to as 'terminals'), which are represented by mobile phones or portable multimedia players, have not only been miniaturized and lightened due to steady technology development, but also mp3, camera, and DMB. It is being reborn as having a combination of functions such as (Digital Multimedia Broadcasting) and navigation.

In addition, the marketing success of such a terminal will depend on how thin and compact the device can be made while having the same or superior function as that of other companies' products, or how appealing to consumers in terms of design. However, even if these points are excellent, the business vision will be opaque if the user is inconvenient to operate the various functions mounted on the terminal. Therefore, the convenience of the terminal operation can not easily be overlooked in the marketing success.

However, in the conventional display control method of the terminal, there is a problem in that the user requests frequent key manipulation when moving or zooming the displayed image. For example, if a user wants to view another part of the image displayed through the display window, the user needs to manipulate the direction key provided in the terminal several times. If the user wants to enlarge or reduce the displayed part, the user can also press the corresponding key several times. You have to manipulate it. Of course, in the case of a terminal provided with a touch screen may be simpler than the above, the frequency of the number of operations is not greatly improved.

The present invention has been made to solve the above-described problems, pressure sensor input for allowing the user to measure the pressure applied to the pressure sensor input pad, and to move or zoom the displayed image according to the measured pressure level It is an object of the present invention to provide a display control method of a terminal having a pad.

In order to achieve the above object, the present invention provides a pressure sensing unit for sensing a capacitance change amount in a pressure sensor input pad and outputting a digital signal corresponding to the capacitance change amount, and a sensing point of which the capacitance is changed in the pressure sensor input pad. A position sensing unit for sensing a position and outputting a digital signal corresponding to the position of the sensing point, a pressure calculating unit for calculating pressure based on the digital signal input from the pressure sensing unit, and a digital signal input from the position sensing unit And a display control unit configured to control the movement or zooming of the image displayed through the display unit based on the pressure calculated by the pressure calculation unit. Digital input from position sensing unit (A) identifying a direction of the positional change in the call; (B) controlling the display unit to move the image displayed in the direction of the position change identified in step (a) when the pressure calculated by the pressure calculation unit is equal to or less than a predetermined reference value, and by the pressure calculation unit. (C) controlling the display unit to zoom the displayed image based on the direction of the position change identified in the step (a) if the calculated pressure is equal to or greater than a predetermined reference value. It provides a display control method of a terminal provided.

In the above-described configuration, the display control method of the terminal having the pressure sensor type input pad further comprises the step (d) of measuring the speed of the position change in the digital signal input from the position sensing unit, the ( The moving speed of the image in step b) is determined by the speed of the position change measured in step (d), and the zooming speed of the image in step (c) is the position measured in step (d). Preferably determined by the rate of change.

In addition, the display control method of the terminal having the pressure sensor type input pad further comprises the step (e) of measuring the moving distance of the position change in the digital signal input from the position sensing unit, (b) The moving speed of the image in the step is determined by the moving distance of the position change measured in the step (e), and the zooming speed of the image in the step (c) is the position change measured in the step (e) It is preferably determined by the moving distance of.

According to the display control method of the terminal having a pressure sensor type input pad of the present invention, the user moves only by adjusting the force applied to the pressure sensor type input pad with a non-conductor tool other than his or her finger or hand, There is an effect that can move, enlarge or reduce the image in the desired direction without frequent key operation.

Hereinafter, a display control method of a terminal having a pressure sensor type input pad according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are respectively an exploded perspective view and a cross-sectional view showing an example of a pressure sensor type input pad that can be provided in a terminal implementing the present invention.

As shown in FIGS. 1 and 2, the pressure sensor type input pad (hereinafter, simply referred to as an input pad) 100 may include a substrate 110, a first electrode plate 120, an elastic layer 130, and a second electrode plate. 140, a protective layer 150, and a display sheet 160.

In the above-described configuration, the substrate 110 is a conventional substrate such as, for example, a circuit board (PCB and FPCB) capable of printing the electrode portions 120 and 140 in a grid shape, and supports the components of the terminal. It works.

The first pole plate 120 is one of two electrode portions of the pressure sensor for detecting a change in capacitance, and preferably, a strip-shaped thin copper plate may be used. In addition, a plurality of first electrode plates 120 are printed on the substrate 110 such that a plurality of first electrode plates 120 are arranged in parallel at a predetermined interval.

The elastic layer 130 is coated on the first electrode plates 120 with a constant thickness (d: distance). In addition, the elastic layer 130 is present between the two electrode plates (120, 140) to act as a kind of dielectric. Here, as the elastic layer 130, a well-known thermoplastic elastomer (TPE) such as polyolefin-based, PVC-based, polystyrene-based, polyester-based, polyurethane-based, or polyamide-based may be used.

The second pole plate 140 is another one of the two electrode portions of the pressure sensor for detecting a change in capacitance, and is preferably implemented as a strip-shaped copper plate like the first pole plate 120. In addition, the second electrode plate 140 is printed on the elastic layer 130 in the same manner as the first electrode plate 120, but is printed in the vertical direction with respect to the first electrode plate 120 and in rows at regular intervals.

As such, the first electrode plate 120 and the second electrode plate 140 are cross-printed with each other with the elastic layer 130 interposed therebetween, so that the second electrode plate 140 corresponds to the thickness of the elastic layer 130. At a distance d, the first electrode plate 120 is disposed in a mesh structure having a lattice form. Therefore, the intersection between the anode plates 120 and 140 serves as a sensing point that causes a change in capacitance according to the pressure in the input pad 100.

That is, when the user presses a specific position of the input pad 100 by hand, the elastic layer 130 contracts at the sensing point corresponding to the pressing position, whereby the first electrode plate 120 and the second electrode plate. The distance d between the 140 is variable. Therefore, as the distance d changes, the sensing point corresponds to the formula of C = μA / d, where C is the capacitance, μ is the dielectric constant, A is the area, and d is the distance between the electrode parts. A change in capacitance occurs. At this time, the amount of change in capacitance is different depending on the size of the pressing pressure. Thereafter, when the pressing force is removed, the elastic layer 130 and the second electrode plate 140 are returned to their original positions by the elasticity of the elastic layer 130.

The protective layer 150 is a layer for protecting the second electrode plate 140, and may be formed of, for example, polyester. In addition, the protective layer 150 may be formed as thin as possible as long as it can protect the second electrode plate 140.

The display sheet 160 is a sheet in which letters or numbers 161, etc. necessary for the operation of the terminal are printed at positions corresponding to the sensing points.

In the above description, the protective layer 150 and the display sheet 160 have been described as functionally separated while the input pad 100 is described, but the rest of the protective layer 150 and the display sheet 160 are omitted. It is also possible to configure the functions of the omitted ones together.

3 and 4 are respectively an exploded perspective view and a cross-sectional view showing another example of a pressure sensor type input pad that can be provided in a terminal implementing the present invention.

As shown in FIGS. 3 and 4, the input pad 200 may include a substrate 210, a first electrode plate 220, an elastic layer 230, a second electrode plate 240, a protective layer 250, and a display sheet. The substrate 210, the elastic layer 230, the protective layer 250, and the display sheet 260 are substantially the same as those of the input pad 100 described above. Details are omitted.

In the above-described configuration, the first electrode plate 220 is one of two electrode portions of the pressure sensor for detecting a change in capacitance, and it is preferable that the first electrode plate 220 is a plurality of circular copper plates instead of a strip shape as shown in FIG. 1.

The second electrode plate 240 is the other one of the two electrode parts of the pressure sensor for detecting a change in capacitance, but is formed on the elastic layer 230, unlike the first electrode plate 220, It is preferable that it is a single copper plate which covers the whole. In addition, a point corresponding to the position of the first electrode plate 220 formed below the second electrode plate 240 serves as a sensing point that causes a change in capacitance due to the pressure in the input pad 200.

That is, when a specific position of the input pad 200 is pressed, the elastic layer 230 is contracted at the sensing point corresponding to the pressing position, thereby the distance between the first pole plate 220 and the second pole plate 240. (d) is variable. Therefore, a change in capacitance occurs at a sensing point corresponding to the change in distance d. At this time, the amount of change in capacitance is different depending on the size of the pressing pressure. Thereafter, when the pressing force is removed, the elastic layer 230 and the second electrode plate 240 are returned to their original positions by the elasticity of the elastic layer 230.

5 is an electrical block diagram of a terminal having a pressure sensor type input pad embodying the present invention.

As shown in FIG. 5, the terminal having a pressure sensor type input pad (hereinafter, simply referred to as a “terminal”) 300 is an input pad 310 and an input pad 310 in the form described in the above embodiments. Pressure sensing unit 320 for detecting a change in capacitance and outputting a digital signal corresponding to the change amount, and detecting the position of the sensing point at which the capacitance is changed in the input pad 310 and corresponding digital signal Input from the position detection unit 330, the pressure calculation unit 340 and the position detection unit 330 that calculates the pressure value of the portion pressed by the user based on the digital signal input from the pressure detection unit 320 The display controller 350 may control the movement or zooming of the image displayed through the display unit 360 based on the digital signal and the pressure calculated by the pressure calculator 340.

In addition, the terminal 300 may further include a sinusoidal wave generator (not shown) for transmitting an alternating current (sine wave) to the two pole plates of the input pad 310 so that charging / discharging of capacitance occurs at the sensing point. Thus, when the user presses the input pad 310, the capacitance changes at the corresponding sensing point.

In addition, the terminal 300 should be interpreted more broadly as a concept including a handheld-based electronic device as well as a personal computer (PC) such as a notebook or a desktop.

6 and 7 are flowcharts illustrating a display control method of a terminal having a pressure sensor type input pad according to an embodiment of the present invention.

First, the terminal 300 periodically detects the position of the sensing point whose capacitance is changed by the position detecting unit 330 in accordance with the internal clock generation (step S11), and the pressure detecting unit 320 and the pressure calculating unit ( The pressure at the position where the capacitance is changed by 330 is measured (step S13).

 Meanwhile, in step S15, the display control unit (hereinafter, simply referred to as a “control unit”) 350 determines whether there is a change in the position value in the digital signal input from the position detecting unit 330, and as a result, the position value is changed. If yes, the flow advances to step S17 to measure the direction of change of position, the moving distance and the moving speed.

Next, in step S19, the controller 350 determines whether the measured pressure is greater than or equal to a predetermined reference value. Here, the performance of step S17 and step S19 according to the change in the position value in the digital signal input from the position sensing unit 330 has been described as sequential for convenience of description, but simultaneously by the control unit 350 and the internal clock generation It should be interpreted as being done periodically in accordance with.

As a result of the determination in step S19, when the measured pressure is equal to or less than the reference value, the control unit 360 controls the display unit 360 to move the display image in the measured direction based on the measured moving distance and moving speed.

That is, when the user moves his finger in the direction 162 as shown in FIG. 1 while pressing the input pad 310 as the user manipulates the touch pad, the terminal 300 recognizes this, but the user applies a force. Only when the degree is lower than or equal to a preset reference pressure, the user moves the displayed image in the desired direction.

On the other hand, as a result of the determination in step S19, when the measured pressure is equal to or more than the reference value, the flow advances to step S23 to determine whether the direction in which the position change moves is left. As a result, in the left direction, the display unit 360 is controlled to enlarge the display image based on the measured moving distance and the moving speed (step S25). On the other hand, if the direction in which the change of position moves is the right side, the display unit 360 is controlled to reduce the display image based on the measured moving distance and the moving speed (step S27).

That is, when the user presses the input pad 310 and moves his finger slightly in a predetermined direction, the terminal 300 recognizes this, but the position is applied only when the degree of force applied by the user is greater than or equal to a preset reference pressure. It is to enlarge or reduce the displayed image based on the direction of change. In addition, the direction setting for zooming of the screen is not limited to the above example in which the left side is enlarged image and the right side is reduced image, and may be variously set by the user.

Next, in step S29, the controller 350 determines whether or not the zooming operation is finished. For example, the controller 350 returns to step S23 when the measured pressure is equal to or greater than the reference value.

On the other hand, when the pressure measured as a result of the determination in step S29 is less than the reference value or there is no sensing point at which the capacitance changes for a predetermined time by the position sensing unit 330, the zooming operation as described above is terminated. That is, when the user releases a finger from the input pad 310 or reduces the pressure applied to the input pad 310 to end the zooming operation, the terminal 300 recognizes this and ends the zooming operation.

The display control method of the terminal having the pressure sensor type input pad of the present invention is not limited to the above-described embodiment and can be modified in various ways within the scope of the technical idea of the present invention.

1 and 2 are respectively an exploded perspective view and a cross-sectional view showing an example of a pressure sensor type input pad that can be provided in a terminal implementing the present invention,

3 and 4 are respectively an exploded perspective view and a cross-sectional view showing another example of a pressure sensor type input pad that can be provided in a terminal implementing the present invention,

5 is an electrical block diagram of a terminal having a pressure sensor type input pad embodying the present invention,

6 and 7 are flowcharts illustrating a display control method of a terminal having a pressure sensor type input pad according to an embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100, 200: pressure sensor input pad

300: terminal 310: pressure sensor type input pad

320: pressure detection unit 330: position detection unit

340: pressure calculation unit 350: display control unit

360: display unit

Claims (3)

A pressure sensing unit for sensing a capacitance change amount in a pressure sensor input pad and outputting a digital signal corresponding to the capacitance change amount, and detecting a position of a sensing point whose capacitance is changed in the pressure sensor input pad, and at a position of the sensing point A position detector for outputting a corresponding digital signal, a pressure calculator for calculating pressure based on the digital signal input from the pressure detector, and a digital signal input from the position detector and the pressure calculated in the pressure calculator. The control unit is performed by the display control unit in a terminal having a pressure sensor type input pad including a display control unit for controlling movement or zooming of an image displayed through the display unit. (A) checking a direction of position change in the digital signal input from the position sensing unit; (B) controlling the display unit to move the image displayed in the direction of the position change identified in step (a) when the pressure calculated by the pressure calculation unit is equal to or less than a predetermined reference value; and When the pressure calculated by the pressure calculation unit is equal to or greater than a predetermined reference value and the direction of the position change confirmed in the step (a) is a predetermined image enlargement direction, the display unit is controlled to enlarge the displayed image, and the pressure calculation (C) controlling the display unit to reduce the displayed image when the pressure calculated by the unit is equal to or larger than a predetermined reference value and the direction of the position change identified in the step (a) is a predetermined image reduction direction. Display control method of the terminal having a pressure sensor type input pad made. The method of claim 1, (D) measuring the speed of the position change in the digital signal input from the position sensing unit, The moving speed of the image in the step (b) is determined by the speed of the position change measured in the step (d), The magnification or reduction speed of the image in the step (c) is determined by the speed of the position change measured in the step (d). The method of claim 2, (E) measuring a moving distance of a change in position in the digital signal input from the position detecting unit; The moving speed of the image in the step (b) is determined by the moving distance of the position change measured in the step (e), The enlargement or reduction speed of the image in step (c) is determined by the moving distance of the position change measured in step (e).

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