JP2011232838A - Touch sensor with input auxiliary function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch sensor with an auxiliary function preventing a wrong key from being touched again if any one of keys in an arrangement of multiple touch keys is touched and selected and then a cancellation operation to the touch operation is performed.SOLUTION: When a touch operation to any one of the multiple keys displayed on a touch panel is detected and then a cancellation to the touch input is inputted, a sensing area is changed by reallocating the sensing area of the touched key to sensing areas of surrounding keys. The wrongly touched key is invalidated by reallocating all the sensing area of the key to those of the surrounding keys, or only a portion of the sensing area of the key can be reallocated. The key whose sensing area is reallocated to the sensing area of other keys is displayed differently, such as by changing its color or being displayed smaller, so that it is recognizable.

Description

  The present invention relates to a touch sensor, and in particular, when a specific key is selected from a large number of arranged keys and touch input is performed, when an incorrect key is touched, an erroneous operation can be prevented from being performed again. Regarding sensors.

  In LCDs that are widely used nowadays, a touch panel is affixed to the surface, and when a user touches an arbitrary part with a finger or the like, the touch position is detected and used as an instruction input by the user. It has been broken. That is, for example, by bringing a finger or the like into contact with various instruction input image portions displayed on the screen, the XY position of the entire screen is detected and used by contact position detection means using various methods formed on the touch panel. A predetermined input is made on the assumption that the user's instruction is an instruction of the screen displayed at the position. Such an instruction by the user is not a point that is simply instructed, but by tracing it, it is possible to instruct a line or even a surface or display it.

  There are various methods for such a touch panel, but the resistive film method is widely used because it has high position detection accuracy, operates stably, has few failures, and can be manufactured at a relatively low cost. There are various types of resistive film methods, but many of them are a seal material for bonding upper and lower panels having a thickness of about 5 to 10 μm on the surface of a glass substrate serving as a base, and between upper and lower electrodes. A dot spacer for preventing the short circuit is appropriately disposed, and an elastic glass or PET sheet of about 200 μm is attached to the surface thereof. Transparent electrodes called ITO (Indium Tin Oxide) are provided on the surfaces where the glass substrate and the sheet face each other.

  FIG. 7A shows a touch position detection method for detecting a point indicated by a finger or the like for the four-wire type which is the most basic configuration in these electrode configurations. In the example shown in the figure, the fixed electrode 22 is provided with a Y1 electrode and a Y2 electrode on opposite sides to detect the position in the Y direction about the XY axis, and the Y1 electrode side with respect to this electrode Is applied, and the Y2 electrode side is applied with a negative voltage. In order to detect the position in the X direction of the movable electrode 21 facing the fixed electrode 22 with a spacer not shown in the figure on the same figure, an X1 electrode and an X2 electrode are provided on the vertical sides. A voltage that is + on the X1 electrode side and − on the X2 electrode side is applied to the electrode.

  With such an electrode configuration, when the user presses point P, which is an arbitrary position on the touch panel, the resistance film on the movable electrode side 21 bends in the direction of the spacer and comes into contact with the resistance film on the fixed electrode 22 side. A partial pressure resistance is generated in the resistance films on the movable electrode 21 side and the fixed electrode 22 side, and the positions thereof can be obtained. That is, in the example shown in the drawing, the resistance value of Rx1 is set on the X1 electrode side and Rx2 is set on the X2 electrode side with the point P on the movable electrode 21 side. Similarly, the fixed electrode 22 side has a resistance value of Ry1 on the Y1 electrode side and the y2 side of the Y2 electrode side across the point P. By sticking the movable electrode 21 as described above to the fixed electrode 22 with a spacer in between, a touch panel 23 as shown in FIG. 7B is formed, and the surface thereof becomes an instruction input portion.

  The touch panel is attached to the surface of the LCD liquid crystal display device 24 as shown in FIG. 8A, thereby creating a liquid crystal display device 25 with a touch panel as shown in FIG. When the user touches and presses the surface of the touch panel while displaying the key, the key existing at the XY position in the image displayed on the liquid crystal screen corresponding to the touched XY position Can be detected as an instruction.

  However, in recent years, various types of input have been frequently performed due to higher functionality of portable devices and on-vehicle devices, and many selection keys can be arranged on a relatively small screen, and a selection instruction can be made by touching an arbitrary one. It is increasing. In particular, when searching for addresses and facilities by alphabets or Japanese syllabary, for example, alphabetical key input method of FIG. 9 (a), Japanese alphabetical key input method of (b), keyboard type key input of (c). It will be input depending on the method. In this case, since this key arrangement is displayed on one screen, for example, in a navigation device, in many cases, it must be displayed within a predetermined size according to the 1DIN, 2DIN standards, etc., and each key must be small. I do not get. The same applies to the portable information terminal.

  A key input method for displaying a large number of keys on a liquid crystal screen and selecting an arbitrary one from them displays a number of function display parts side by side on a single screen, in addition to the input of characters and the like as described above. A method of displaying the next screen by touching any of the above or actually starting the selected function is often used in, for example, mobile phones. At this time, a large number of function selection portions are displayed due to enhancement of the AV function and data communication function of the mobile phone. Such a function selection portion and the like are substantially the same as the key. Therefore, in the present invention, a plurality of these selection portions are arranged and touched to perform each function. Collectively.

  As described above, when an arbitrary key is selected by touching a large number of touch keys displayed on the LCD screen, the user selects a key to be instructed from small selection keys. The input is made by touching with, for example, a key that is not supposed to be pressed, and the adjacent key is often pressed. In particular, in navigation devices, the monitor is fixed at the center of the vehicle, and when the driver on the side of the vehicle operates the vehicle while it is stopped, the keys displayed on the monitor screen installed in the center of the vehicle from the driver's seat are displayed. In other words, it is necessary to extend the hand in the lateral direction to operate, particularly when the display of each key is small, the surrounding keys are often touched.

  Patent Document 1 discloses a technique in which when an operator erroneously touches a key on a touch panel and performs a cancel operation, the erroneously touched key and surrounding keys are displayed in an enlarged manner, and the subsequent erroneous touch is prevented. Has been. In addition, when touching a plurality of touch operation keys, the number of repetitions of the operation to cancel the first operation key is performed after the touch operation is performed on the first operation key. A technique for separately displaying the first operation key itself and the adjacent key separately is disclosed in Patent Document 2.

JP 2007-140900 A JP 2009-31913 A

  As described above, when many keys are displayed on a relatively small screen and an arbitrary key is touched among them, the surrounding keys are often pressed, and countermeasures are required. For the erroneous touch key as disclosed in No. 1, the key and the adjacent key are enlarged and displayed, which is effective when the operator actually operates a nearby key touched this time. If you touch a key that is far away from that position, or if you touch another part key completely, the screen with the original touch keys will not be displayed and only the enlarged screen will be displayed. After canceling the enlarged screen, a new touch operation must be performed, which is troublesome. In this regard, the technique disclosed in Patent Document 2 causes the same problem because the screen on which the original touch keys are arranged is not displayed.

  Therefore, according to the present invention, when a plurality of touch keys are arranged and selected by touching an arbitrary key, when an operation for canceling the touch operation after the touch operation is performed, the touch of the erroneously touched key is not performed again. The main object of the present invention is to provide a touch sensor with an input assist function that prevents touching at least, and at the same time makes it easy to touch keys around the touched key.

  In order to solve the above problems, a touch sensor with an input assist function according to the present invention detects touch of any of a plurality of keys displayed on a touch panel, and touches the key with the touch key detection means. When the cancel instruction input means for inputting that the operation for canceling the touch to the key has been performed and the operation for canceling the touch to the key is input to the cancel instruction input means, Touch sensitive area changing means for allocating a touch sensitive area for a key to a touch sensitive area of a key around the key is provided.

  In another touch sensor with an input assist function according to the present invention, in the touch sensor with an input assist function, the touch sensitive area changing unit allocates all of the sensitive parts of the key to sensitive parts of surrounding keys. It is characterized by that.

  According to another touch sensor with an input assist function according to the present invention, in the touch sensor with an input assist function, the touch sensitive area changing means converts a part of the sensitive part of the key to a sensitive part of a surrounding key. It is characterized by allocating.

  In another touch sensor with an input assist function according to the present invention, in the touch sensor with an input assist function, the key has a display distinguishable from other keys, indicating that the sensitive part has been changed. A touch panel display means is provided.

  In another touch sensor with an input assist function according to the present invention, the touch sensor with an input assist function in the touch sensor with an input assist function is applied to a monitor of a navigation device for a vehicle.

  Since the present invention is configured as described above, when a plurality of touch keys are arranged and selected by touching an arbitrary key, when an operation for canceling the touch operation is performed after the touch operation is performed, the erroneously touched key is selected. Since the sensitive part of the key around the key is allocated and changed so that it is expanded to the sensitive part of the key that was touched incorrectly, the sensitive part of the key that was touched incorrectly disappears or the area decreases, and the touched key is touched again. In addition, it is possible to prevent erroneous touches again because the sensitive portions of the keys around the touched key are widened and the touch becomes easy.

It is a functional block diagram of the Example of this invention. It is an operation | movement flowchart of the Example. It is a figure which shows the various operation | movement aspects of the Example. It is a figure which shows the operation | movement aspect of the Example. It is a figure which shows the further another aspect of this invention. It is a figure which shows the further another aspect of this invention. It is explanatory drawing of a touch panel. It is explanatory drawing of a touch panel. It is a figure which shows the arrangement | sequence of the various keys using a touch panel.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of the present invention. In this invention, the liquid crystal display device with a touch panel formed by sticking a touch panel on the surface of a liquid crystal screen as shown in the said FIGS. 7-9 is used. Displaying multiple keys on this LCD screen, touching the touch panel affixed to the surface like touching any of the displayed keys, the touch panel responds and detects and outputs that key as selected . In the present invention, such a liquid crystal display device with a touch panel is hereinafter collectively referred to as a touch panel.

  FIG. 1 includes a touch panel 1 as described above. In the illustrated touch panel 1, an example in which a plurality of keys made up of alphabets and numbers are arranged to perform alphabet input of addresses and the like is shown. In the touch panel 1, when the touched key is “M”, for example, this is displayed above so that the operator can understand. In addition, when the input character is not the character intended by the operator, that is, when a touch error occurs, a delete key is provided to cancel the input character. In the illustrated touch key, for example, when a road name in an address search is input, there are 825 roads with the input “M” as an initial letter.

  In the example of FIG. 1, an instruction input unit 2 is provided, and a touch key detection unit 3 therein detects a key that is instructed by an operator touching the touch panel 1 with a finger or the like. . Further, in the cancel instruction input unit 4, when the delete key is touched in the example of the touch panel shown in FIG. This is detected, and the touch key input made before is canceled and the operation is canceled.

  In the example of FIG. 1, the cancel key is provided on the touch panel, and the cancel instruction input unit 4 inputs the touch key by touching the cancel key. However, various operations are performed on other devices equipped with the touch panel. In some cases, a cancel key may be provided as a common hard key, and the cancel instruction input unit 4 detects and inputs such a hard key operation. Also, for example, when a number of keys corresponding to each function are displayed to select various functions, when one of the keys is selected and instructed, the function is not intended. Thus, even when an operation to return to the original function selection screen is performed, it is detected that a cancel instruction has been issued. As described above, the instruction input unit 2 can input various instructions such as a hard key operation or a cursor operation in addition to the input from the touch panel 1. The input end detection unit 5 detects that an intended input is made by a series of operations on the touch panel 1 and an end key operation or an instruction to shift to the next operation screen is given, and the series of processing is terminated. To do.

  The touch sensitive area changing unit 11 is a part that performs the most basic processing of the present invention, and performs a process of allocating sensitive parts of erroneous touch keys to sensitive parts of surrounding keys. That is, in the key arrangement of the touch panel 1, when the operator touches “M” as shown in the figure, the touch key detection unit detects this “M”, but then the cancel instruction input unit 4 performs this touch. When it is detected that the input is canceled, the touch sensitive area changing unit 11 assumes that “C”, “N”, “W”, and “L” adjacent to “M” touched this time are not the keys intended this time. A process of expanding the sensitive part to the “M” side is performed.

  In the example shown in FIG. 1, an example is shown in which four keys adjacent to the erroneous touch key “M” are equally allocated, and are shown as (C) (N) (W) (L) in the same figure. The triangular part is the part which expanded the sensitive area in each key. For the key “M” invalidated at this time, it is possible to determine what key is present, and it is understood that the sensitive area has been lost or narrowed as described above, for example, a display such as changing the color is displayed. Do. Note that the above example shows only one example performed by the touch sensitive area changing unit 11, and the sensitive area can be changed in various manners as will be described later.

  In the touch panel display unit 6, for example, when “M” is touched among the keys of the touch panel 1 as described above, when the touch key detection unit 3 detects this, the touch panel display unit 6 displays a part of the screen. In addition, various displays such as displaying that the key touched this time is “M” are performed. Further, in the example of FIG. 1, there are also displayed that there are 825 items corresponding to “M”.

  In the touch detection key corresponding output unit 7, when the current touch panel key input is input of characters and numbers as described above, a process of displaying the touched key characters or numbers is performed. The touch panel 1 displays keys corresponding to various functions of the device equipped with the touch panel, and performs the function by touching an arbitrary key, or displays the next function selection screen. Sometimes, the touch detection key corresponding output unit 7 outputs an instruction to perform the function instructed at that time.

  In the touch key input confirmation unit 8, when the operator touches the key displayed on the touch panel 1 as described above and the cancel operation is not performed after that, the previous key operation is performed when the next operation is performed. Confirm that the key is intended by the user. By the touch key input confirmation, the touch detection key corresponding output unit 7 performs output corresponding to the input confirmation. Further, when the input of the touch key is confirmed as described above, this is stored in the input confirmation storage unit 9, for example, when “A” is confirmed by the first touch operation, the next series of characters such as addresses Is stored until the final input processing is completed.

  In the example shown in FIG. 1, the touch sensitive area change canceling unit 10 is provided, and after performing the sensitive area change process for the erroneous touch key as described above, this time when detecting that the operator touches any key, This sensitive area changing process is considered to be finished, and this state is canceled to return to the original normal sensitive area state.

  In the present invention comprising the functional blocks as described above, it can be carried out, for example, according to the operation flow shown in FIG. In the example of the touch panel input process shown in FIG. 2, the touch input key display is first performed on the touch panel (step S1). The key display at this time is arbitrarily displayed in various input functions of various devices. In this case, for example, a key arrangement for inputting various characters and numbers as shown in FIGS. Further, there is an almost infinite key arrangement such as an album selection key arrangement as shown in FIG. 5C and various key arrangements as shown in FIG.

  Next, touch input is performed on the key display portion of the key display of the touch panel (step S2), and then output corresponding to the touched portion is performed by detecting this touch input (step S3). In the example of FIG. 1, keys for inputting arbitrary characters and numbers are arranged on the touch panel. When a character input key is selected and touched, for example, the “M” key, the key touched this time is displayed. Is output indicating that “M” is “M”. Further, when the “Delete” key displayed on the touch panel is touched, an output to cancel the previously performed operation is performed. When keys for performing various functions are displayed on the touch panel, touching those keys outputs outputs for executing the functions.

  These processes are performed when the touch key detection unit 3 in the instruction input unit 2 in FIG. 1 detects that the operator touches, for example, the “M” key, and the touch detection key corresponding output unit 7 displays the touch panel display unit 6. On the other hand, it is performed by displaying that the key touched this time is “M”.

  Thereafter, in the illustrated example, it is determined whether or not a cancel instruction has been input (step S4). Here, for example, when it is detected that a new touch input has been performed for inputting the next character without pressing the cancel key, or when processing of the next function is started by touching the key, etc. In step S4, it is determined that no cancel instruction has been input, and the process proceeds to step S11.

  In step S11, as described above, the current touch input is confirmed, and after that, it is determined whether or not to end the touch input (step S12). As described above, when processing such as a series of touch key input ends and the process proceeds to the next screen is performed, it is determined that the touch input is ended here, and the series of touch panel input processing ends (step S13). If there is no end-related input as described above in step S12, it is determined that the series of touch inputs has not ended yet, the process returns to step S2, the next touch input is performed, and the operation is repeated.

  When it is determined in step S4 that a cancel instruction has been input, that is, when an instruction input for canceling is detected by the cancel instruction input unit 4 in FIG. 1, the process proceeds to step S5, and the sensitive part of the touched key is moved to the surrounding area. Allocate to the sensitive part of the key. When the “M” key is touched as shown in FIG. 3A using the same touch key as in FIG. 1, the erroneously touched key “M” is then selected as shown in FIG. 3B. All the sensitive parts are assigned to the sensitive parts of the adjacent keys. The above description is as described in the description of the touch sensitive area changing unit 11 in FIG.

  On the other hand, in another touch key allocation change example 2 shown in FIG. 3C, a small sensitive part is left also for the key “M” that has been erroneously touched first, and the surrounding part is the sensitive part of the adjacent key. Allocated to These operations are also performed in the touch sensitive area changing unit 11 of FIG. When allocating the key sensitive parts at the time of an erroneous touch, as shown in FIG. 5D, “B”, “D”, “X”, “X” present at the corner as keys adjacent to the erroneous touch key “M”. The area of “V” may be enlarged and arranged at the four corners of the original “M” area.

  Further, as shown in FIG. 5E, the enlarged regions arranged at the four corners of the original “M” region are regions that are respectively connected to the keys of the original “M” corner portion. Can also be determined. In that case, a part of the sensitive area of the surrounding keys is used, but it is easier to input the keys located in the corner portion of “M” than the example shown in FIG. Become. The operation for changing the sensitive area is performed in the touch sensitive area changing unit 11 in FIG.

  Thereafter, the erroneously touched key as described above is displayed so as to be distinguishable from other keys (step S6). The display method that can be identified at this time can be implemented in various ways. For example, the display method can be different from the color of other keys, or the key display can be reduced and the keys can be displayed lightly. By this method, it can be shown to the operator that even if the key of that part is touched, it does not function or that the touch sensitive area is narrowed.

  Next, touch input is again performed on the key display part of the touch panel (step S7), and an output corresponding to the touched key is made, such as displaying what key the touched part is or what function is performed. (Step S8). In the example of FIG. 2, thereafter, the change of the touch sensitive part is released (step S9). This process is performed when the touch sensitive area changing unit 11 in FIG. 1 performs the sensitive area changing process for the erroneous touch key and then the touch key detecting part 3 detects that the next touch input has been made. The area change canceling unit 10 cancels allocation of the sensitive part.

  Thereafter, similarly to step S4, it is determined whether or not a cancel instruction has been input (step S10). When it is determined that no cancel instruction has been input, the process proceeds to step S11 to confirm the current touch input, and thereafter Performs the above operation. On the other hand, when it is determined in step S10 that a cancel instruction has been input, the process returns to step S5 and the above operation is repeated.

  However, even if the sensitive area of the key around the erroneous touch key is expanded and the touch area is touched with a key that has expanded the sensitive area, the touch input is canceled as an erroneous touch. When it is done, it may be determined that the re-touch is also a touch of the surrounding keys, and the same processing as the enlargement of the sensitive area around the erroneous touch key may be performed. At that time, in addition to the key that was erroneously touched first, the key that was erroneously touched this time may be invalidated by expanding the sensitive area of the surrounding keys. Similarly to the example of FIG. May be left as a sensitive area with a small area.

  As a result of performing the series of processes as described above, in the present invention, for example, a touch panel display as shown in FIG. 4 is made. In the example of the touch panel shown in FIG. 4, an example of use of the touch panel having the same key arrangement as the touch panel of FIGS. 1 and 3 is shown, and a state in which a street name is about to be input by the touch panel is shown.

  In the example shown in FIG. 4, as shown in FIG. 4 (a), from the state in which most of the touch keys are normally displayed, the operator touches the “M” key as in the above example. At this time, a display as shown in FIG. That is, it is displayed in the upper input display field that the key touched this time is “M”. At this time, the search number column indicates that there are 825 street names that are initially “M”.

  FIG. 9A shows that there are 9007 search targets. In FIG. 5B, if the key “M” touched first by the operator is correct, the next input character is bright from the point of the database search result and the search function. Indicates that the key is shown. In the illustrated example, keys such as “A”, “C”, “E”... Are candidates for the next character, and keys such as “B”, “D”, “F”. Indicates that the next character is not a candidate.

  In FIG. 4 (b), the operator knows that the “M” key has been touched by displaying “M” in the input display field, and he originally wanted to press “N” next to it. Know that you've touched. Here, when the operator presses the cancel key, the screen returns to the initial screen similar to (a) as shown in FIG. However, at this time, as described above, the sensitive area is assigned to the erroneous touch key “M” and the adjacent key, the sensitive area is enlarged for the surrounding keys, and the sensitive area is assigned to the erroneous touch key. Disappears or shrinks. The fact that such processing has been performed makes it possible to know the state of the erroneous touch key “M” being displayed small in the figure.

  When the operator performs touch input again from the state shown in FIG. 4C, when the “N” sensitive area is touched, a display as shown in FIG. 4D is made. That is, the input display field indicates that the “N” key has been touched this time, and keys other than the key in which the character following N is found as a result of searching the database are displayed to be somewhat inconspicuous. At this time, in the example of the operation flow of FIG. 2, the change of the sensitive area is canceled by detecting that the key around the erroneous touch key that changed the sensitive area is touched this time. In this state, the erroneous touch key “M” was previously displayed in a small size by invalidating or reducing the sensitive area, but it is restored to the original size by canceling this. .

  In the illustrated example, the touch key “M” is erroneously touched, and the sensitive area of the surrounding keys is enlarged and changed, and then the touched key is touched. Touching the “M” key first is completely misunderstood. Originally, for example, “If you notice that you had to touch the“ G ”key, or if you accidentally touched“ M ” For example, when the key is “O” which is a little away from the touch, the change of the touch sensitive part is cancelled.

  In this regard, in the prior art, since the display including the keys around the erroneous touch key is enlarged, the original key display is not visible, and an attempt is made to touch a key that is not the key around the erroneous touch key. Then, the enlarged display must be canceled and returned to the original key display, whereas in the present invention, such enlarged display is not performed, so this problem can be solved.

  In the above example, an example of a key displaying characters and numbers as a touch key is shown. However, the present invention can also be applied to a case where various keys are displayed. For example, a mobile phone as shown in FIG. In the portable information terminal as shown in (b), when a large amount of audio recorded in the internal memory is selected and listened, for example, when a jacket photo is displayed and selected. Can be applied.

  In the example shown in FIG. 5, when the album of the jacket photo touched by the user is selected from a large number of jacket photos A to L as shown in FIG. 5C, the jacket shown as H in FIG. When it is detected that the photograph has been touched and the song included in the photograph is displayed on the next screen, the user notices the erroneous touch and returns to the original screen. At that time, as shown in FIG. 4D, the sensitive parts are assigned to the keys (E), (I), (K), and (G) around the erroneous touch key (K). Allocation at this time can be performed in various manners in the same manner as in FIGS. 4C to 4E except for the example of FIG.

  The present invention can also be used in the same manner when an arbitrary key is selected from vertically arranged keys as shown in FIG. That is, for example, in the example of FIG. 5, when the user selects an arbitrary album, the names of the songs included in the album are listed as shown in FIG. 6A, and an arbitrary song is selected from the songs by touch input. Corresponds to the attempt. In the example shown in the figure, because “CCCC” has been touched incorrectly, when the user tries to select again, the sensitive parts of the upper and lower keys are different from the sensitive parts of the key that is erroneously touched as shown in FIG. Allocate to widen the range. As a result, the sensitive parts of the “BBBB” and “DDDD” keys are widened, and it is easy to correct erroneous touches.

  In addition, in the case shown in FIG. 6C, when the design of arranging the keys “B”, “C”, “D”, “E” and “F” around the “A” key is adopted, the center “ When recognizing that the “A” key is accidentally touched and returning to the original screen, for example, as shown in FIG. The example which performed the allocation which spreads to the sensitive part of is shown.

  In the above example, the sensitive part is shown in close contact with each other. However, as shown in FIG. 6E, even when the sensitive parts are separated from each other, as shown in FIG. The sensitive parts of the keys that have been touched incorrectly are arranged as (F), (J), (M), and (H). It can also be done.

  As described above, the present invention can be implemented in various modes, but it goes without saying that the present invention can be further implemented in various modes with the same purpose.

DESCRIPTION OF SYMBOLS 1 Touch panel 2 Instruction input part 3 Touch key detection part 4 Cancel instruction input part 5 Input end detection part 6 Touch panel display part 7 Touch detection key corresponding | compatible output part 8 Touch key input confirmation part 9 Input confirmation memory | storage part 10 Touch sensitive area | region change cancellation part 11 Touch sensitive area change part

Claims (5)

Touch key detection means for detecting that one of a plurality of keys displayed on the touch panel is touched;
A cancel instruction input means for inputting that an operation for canceling the touch to the key has been performed after detecting the touch to the key by the touch key detecting means;
Touch sensitive area changing means for allocating a touch sensitive area for the key to a touch sensitive area around the key when an operation for canceling the touch on the key is input to the cancel instruction input means. Touch sensor with input assist function, characterized by having.   2. The touch sensor with an input assist function according to claim 1, wherein the touch sensitive area changing means allocates all sensitive parts of the key to sensitive parts of surrounding keys.   2. The touch sensor with an input assist function according to claim 1, wherein the touch sensitive area changing means allocates a part of the sensitive part of the key to sensitive parts of surrounding keys.   2. The touch sensor with an input assist function according to claim 1, wherein the key includes a touch panel display means for performing a display distinguishable from other keys indicating that the sensitive portion has been changed.   The touch sensor with an input assist function according to claim 1, wherein the touch sensor with an input assist function is applied to a monitor of a vehicle navigation device.

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