JP2011081679A - Input device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an input device for notifying a user when this input device is inclined to perform input across a plurality of keys. <P>SOLUTION: This input device 101 is provided with: a display part 103; an input detection part 104 for detecting input to an input region corresponding to characters; and a control part 106 for, when the input detected by the input detection part 104 is input across the plurality of input regions, determining that the input is ambiguous input, and for, when the number of times of the ambiguous input is equal to or more than a threshold, performing prescribed notification to a user. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an input device, and more particularly to an input device that prevents erroneous input.

  As an input device for inputting characters, for example, there are devices having a mechanical keyboard or a numeric keypad, or devices having a touch panel on which a keyboard, numeric keypad, or the like is displayed. The touch panel has many advantages such as a high degree of freedom in key layout and an intuitive operation. For this reason, in recent years, the number of portable terminals equipped with a touch panel has increased rapidly. Examples of the portable terminal include a cellular phone, a portable music player, and a portable television. Since these portable terminals are required to be portable, it is necessary to reduce the size of the casing. When inputting a touch panel, it is necessary to display a plurality of keys. However, when a numeric keypad or full keyboard of a portable terminal familiar to the user is displayed on the touch panel, the displayed key is larger than the area of the user's finger. It gets smaller. In this case, when the user performs input to the touch panel with a finger, there is a possibility that a plurality of keys are erroneously pressed and erroneous input is performed.

  The operation of the conventional touch panel will be described with reference to FIGS. FIG. 13 shows a state where the user is pressing a plurality of keys. Specifically, the user is erroneously pressing “E” and “S” in an attempt to press the fifth letter “E” of “convenient”. In a conventional touch panel, when a user's finger touches across a plurality of keys, characters corresponding to the center of gravity of the contact are displayed on the display. Therefore, in the case of FIG. 13, “S” corresponding to the center of gravity of the contact is displayed instead of “E” intended by the user. The display screen is as shown in FIG. 14, for example. The key display unit displays keys for user input, the main display unit displays input characters, and the sub display unit predicts the character string displayed on the main display unit. Candidates are displayed. The user can notice an erroneous input by checking the characters displayed on the main display unit. However, during the character input operation, the user pays attention to the key display unit for input, so that it is difficult to notice an erroneous input.

  In view of this, there is a touch panel having a function of changing the display of the input key so that an erroneous input can be recognized on the key display unit even if an erroneous input is made. For example, when the key is not pressed, the key is displayed as protruding, and when the key is pressed, the key is displayed so as to be depressed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 08-292729

  However, even if the user performs a character input operation in a manner of pressing across a plurality of keys, if the user happens to input a key, the user does not attempt to change the way of pressing. Therefore, the user continues to input over a plurality of keys by the same pressing method thereafter. When the number of times of input across a plurality of keys increases, the possibility that an unintended key is input increases, and as a result, the number of erroneous inputs increases. If an incorrect input is made, the erroneous input character must be deleted and the correct character must be input again. In other words, the efficiency of character input work decreases as the number of erroneous input increases.

  Accordingly, an object of the present invention made in view of the above-described problems is to provide an input device that informs a user that there is a tendency to perform input across a plurality of keys.

In order to solve the above-mentioned problems, the input device according to the first invention is
A display unit;
An input detection unit for detecting an input to the input area corresponding to the character;
-When the input detected by the input detection unit is an input that spans a plurality of input areas, the input is determined to be an ambiguous input,
-If the number of ambiguous inputs is greater than or equal to a threshold value, a predetermined notification is given to the user;
A control unit;
Is provided.

Also,
The input detection unit detects an input to an input area corresponding to a character displayed on the display unit,
When the number of times of ambiguous input is equal to or greater than a threshold, the control unit changes the display of characters displayed on the display unit as the predetermined notification.
It is desirable.

In addition, the control unit
When the number of ambiguous inputs is equal to or greater than a threshold, when the input detection unit detects an input to the input area corresponding to the character displayed on the display unit, the predetermined notification Change the display of characters,
It is desirable.

In addition, the control unit
When the number of times of ambiguous input is equal to or greater than a threshold, the display of the character corresponding to the ambiguous input among the characters displayed on the display unit is changed as the predetermined notification.
It is desirable.

The input device further includes:
It has a sound output unit that outputs sound,
When the number of times of ambiguous input is equal to or greater than a threshold, the sound output unit is controlled to output sound as the predetermined notification.
It is desirable.

In addition, the control unit
When the input detection unit detects an input to the input area corresponding to the character,
-If the number of ambiguous inputs is less than a threshold, control the sound output unit to output a first sound;
-When the number of ambiguous inputs is equal to or greater than a threshold, the sound output unit is controlled to output a second sound different from the first sound as the predetermined notification;
It is desirable.

The input device further includes:
A tactile sensation providing unit that provides a tactile sensation with respect to the pressed object that is pressing the input detection unit;
The control unit controls the tactile sensation providing unit to present a tactile sensation to a pressed object that is pressing the input detection unit as the predetermined notification when the number of ambiguous inputs is equal to or greater than a threshold value. ,
It is desirable.

Also,
When the input detection unit detects an input to the input area corresponding to the character, the control unit,
-When the number of ambiguous inputs is less than a threshold value, the tactile sensation providing unit is controlled so as to present a first tactile sensation with respect to a pressed object that is pressing the input detection unit;
-When the number of times of ambiguous input is greater than or equal to a threshold value, the predetermined notification is such that a second tactile sensation different from the first tactile sensation is presented to the pressed object pressing the input detection unit. Control the tactile sensation presentation part,
It is desirable.

The input device further includes:
A load detection unit for detecting a pressing load on the input detection unit;
The controller is
-When the pressing load detected by the load detection unit satisfies a load standard, the input detected by the input detection unit is accepted,
-If the received input is input across multiple input areas, the input is determined to be ambiguous;
-If the number of ambiguous inputs is greater than or equal to a threshold, the load criterion is changed as the predetermined notification;
It is desirable.

  With the input device according to the present invention configured as described above, an input over a plurality of input areas is determined as an ambiguous input, and when the number of ambiguous inputs is equal to or greater than a threshold, a predetermined notification is given to the user. By this predetermined notification, the user can recognize that he / she tends to make an input across a plurality of keys. The user can prevent erroneous input caused by input across a plurality of keys by changing the way of pressing.

FIG. 1 is a functional block diagram showing a schematic configuration of an input device according to the first embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the input device of FIG. FIG. 3 is a diagram illustrating a process performed by the input device of FIG. 1 when there is an input across a plurality of keys. FIG. 4 is a diagram illustrating an example of a predetermined notification in the input device of FIG. FIG. 5 is a diagram illustrating an example of a predetermined notification in the input device of FIG. FIG. 6 is a functional block diagram showing a schematic configuration of the input device according to the second embodiment of the present invention. FIG. 7 is a diagram illustrating an example of a predetermined notification in the input device of FIG. FIG. 8 is a functional block diagram showing a schematic configuration of an input device according to the third embodiment of the present invention. FIG. 9 is a diagram illustrating an example of the load standard indicated in the time curve of the pressing load. FIG. 10 is a diagram illustrating an example of a predetermined notification in the input device of FIG. FIG. 11 is a diagram illustrating an example of a predetermined notification in the input device of FIG. FIG. 12 is a diagram showing a mobile phone as an application example of the input device of the present invention. FIG. 13 is a diagram illustrating a state where the user is pressing a plurality of keys. FIG. 14 is a display screen example of a conventional touch panel.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a functional block diagram showing a schematic configuration of an input device according to the first embodiment of the present invention. Examples of the input device 101 of the present invention include a PDA (Personal Digital Assistant), a mobile phone, a portable music player, a portable TV, a bank ATM (Automated Teller Machine), and a station ticket vending machine. The input device 101 includes a touch panel 102 including a display unit 103 and an input detection unit 104, a storage unit 105, and a control unit 106.

  The display unit 103 displays keys or buttons for inputting characters and the input characters, and is configured using, for example, a liquid crystal display panel or an organic EL display panel. Note that characters include not only hiragana, katakana and alphabets but also numbers and symbols. Characters are assigned to keys or buttons (hereinafter abbreviated as keys). When an input is performed on a key, characters corresponding to the key are displayed on the display unit 103. That is, the key indicates the input area corresponding to the character. When an input is performed in a certain input area, characters assigned to the input area are displayed on the display unit 103. Hereinafter, for convenience of explanation, it is assumed that the shape of the key matches the input area. In the present invention, it should be noted that the input area corresponding to the character and the shape of the key do not necessarily match, and the input area can be set wider (or narrower) than the key. Further, the keys may not be displayed corresponding to the input area.

  The input detection unit 104 detects input by a user's finger, stylus pen or the like (pressed object), and is configured by a known method such as a resistance film method, a capacitance method, or an optical method. In particular, the input detection unit 104 detects an input to an input area (key) corresponding to a character. In addition, for the input detection unit 104 to detect an input, it is not essential that the pressed object physically presses the input detection unit 104. For example, when the input detection unit 104 is an optical type, the input detection unit 104 detects a position where the infrared rays on the input detection unit 104 are blocked by a finger, a stylus pen, or the like. It is not necessary to press.

  The input detection unit 104 detects which key is input, and also detects the degree of contact (eg, area and pressure) between the detected key and the pressed object. It also has a function of an area sensor that changes the output voltage according to the area and a pressure sensor that changes the output voltage according to the contact pressure. For convenience of explanation below, the degree of contact refers to the contact area.

  The storage unit 105 stores various input information and also functions as a work memory.

  The control unit 106 controls and manages the entire input device 101 including each functional block of the input device 101. Here, the control unit 106 is configured as software executed on an arbitrary suitable processor such as a CPU (Central Processing Unit) or a dedicated processor specialized for each process (for example, DSP (Digital Signal Processor)). Can be configured.

  The control unit 106 will be described in more detail. When the input detection unit 104 detects an input to a key, the control unit 106 determines whether or not the input is an input over a plurality of keys (input areas). When this input is an input over a plurality of keys (input areas), the control unit 106 determines that this input is an ambiguous input. That is, the ambiguous input is not an input to only one key, but an input that may cause a character other than the character intended by the user to be displayed on the display unit 103, that is, an input that is likely to cause an erroneous input. That is. The control unit 106 stores the number of ambiguous inputs in the storage unit 105, and performs a predetermined notification to the user when the number of ambiguous inputs exceeds a threshold value. The control unit 106 tends to perform input across a plurality of keys by changing the display of characters (characters assigned to keys) displayed on the display unit 103 as a predetermined notification. Can be visually recognized by the user. The change in display of characters here is not limited to strictly changing the display of only characters. For example, changes in the pattern, shape (size, etc.) and color of keys to which characters are assigned, and changes in the surrounding display (for example, outlines and shadows, etc.) of keys and buttons to which characters are assigned. Note that this is included.

  FIG. 2 is a flowchart showing the operation of the input device of FIG. First, the control unit 106 initializes a counter representing the number of ambiguous inputs stored in the storage unit 105, that is, sets the counter value to 0 (step S101). When an input is made to the key corresponding to the character displayed on the display unit 103 by the pressed object, the input detection unit 104 detects the input (step S102). That is, in step S102, it is detected which key is the input. Then, the input detection unit 104 detects the contact area between the pressed object and the key (step S103). Subsequently, based on the detection result of the input detection unit 104, the control unit 106 determines whether or not the input to the key is an input across a plurality of keys (step S104).

  As shown in FIG. 3A, when an input is made to only one key (“E”) (No in step S104), the control unit 106 determines that the input character (“E”) It can be stored in the storage unit 105 that the current input is a clear input (step S105). The clear input refers to an input made with respect to only one key, that is, an input with a low possibility of causing an erroneous input.

  Also, in step S104, as shown in FIG. 3B, when an input is made across a plurality of keys (“E”, “S”, “D”) (Yes in step S104), the control unit 106 Causes the storage unit 105 to store the character corresponding to the key having the largest contact area (“S”) and the fact that the current input is an ambiguous input (step S106). Note that the control unit 106 can also cause the storage unit 105 to store all characters (“E”, “S”, and “D”) corresponding to a plurality of keys that are in contact with the pressed object due to ambiguous input. In addition, the control unit 106 increases the value of the counter representing the number of ambiguous inputs by one and stores the value in the storage unit 105 (step S107).

  Subsequently, the control unit 106 determines whether or not the counter value is equal to or greater than a threshold value (step S108). When the value of the counter is equal to or greater than the threshold (Yes in step S108), the control unit 106 indicates that the number of ambiguous inputs has increased, that is, the user has a tendency to perform input across a plurality of keys. A predetermined notification for recognizing is made (step S109). As a predetermined notification, the control unit 106 can change the display of the characters (characters assigned to the keys) displayed on the display unit 103 from the display when the counter value is less than the threshold value. For example, the control unit 106 can change the color of characters, the shape of a typeface, and the like. In addition, as described above, by changing the pattern, shape, and color of the key to which the character is assigned, or by changing the display around the key to which the character is assigned (for example, outline, shadow, etc.) It is also possible to make the user recognize that there is a tendency to input across a plurality of keys.

  The character displayed on the display unit 103 by the input to the key is not shown, but is confirmed by performing an input on a confirmation key (Enter key on the keyboard), for example. The control unit 106 determines whether or not an input has been made with respect to the confirmation key (step S110). If no input has been made to the confirmation key (No in step S110), the process returns to step S102. If an input is made to the confirmation key (Yes in step S110), the process ends, and when the next input is detected, the number of ambiguous inputs is initialized. That is, the process of step S110 determines at which timing the number of ambiguous inputs is initialized. The timing at which the number of ambiguous inputs is initialized is not limited to the presence / absence of input to the enter key, but can be arbitrarily set. For example, the control unit 106 can be set to initialize the number of ambiguous inputs when the number of input characters satisfies a predetermined value.

  In addition, although the process of step S109 for performing the predetermined notification has been described as being performed after step S108, the timing of performing the predetermined notification is not limited to after S108 if the counter value is equal to or greater than the threshold value. Absent. For example, after S102, that is, when the input detection unit 104 detects an input to a key corresponding to a character displayed on the display unit 103, a predetermined notification can be performed. As shown in FIG. 4, the control unit 106 detects an input when the counter value is less than the threshold value (FIG. 4A) and when the counter value is equal to or greater than the threshold value. The key display can be changed.

  In addition, since the storage unit 105 stores characters corresponding to the ambiguous input (“E”, “S”, “D” in FIG. 4B), when the number of ambiguous inputs is equal to or greater than the threshold value, the display unit It is also possible to change the display of the character corresponding to the ambiguous input among the characters (characters assigned to the keys) displayed in 103. As shown in FIG. 5, the vaguely input key and the background around the key can be changed. FIG. 5 shows that the user tends to make ambiguous input with respect to the keys “E”, “S”, “D”, “K”, “M”, and “L”.

  Furthermore, although one threshold value has been set as a reference for changing the display of characters displayed on the display unit 103, the threshold value is not limited to one. For example, the threshold value is provided in a stepwise manner, and the control unit 106 can change the display of characters on the display unit 103 in a stepwise manner every time the counter value becomes equal to or greater than the threshold value.

  Thus, in this embodiment, the control part 106 changes the display of the character currently displayed on the display part 103 as predetermined notification, when the frequency | count of ambiguous input is more than a threshold value. That is, the display of characters changes as the number of ambiguous inputs that are likely to cause erroneous input increases. Thereby, the user can recognize visually that there exists a tendency to perform the input over a some key. The user can prevent erroneous input caused by input across a plurality of keys by changing the way of pressing. As the number of erroneous input decreases, the efficiency of character input work increases.

  In the present embodiment, when the number of ambiguous inputs is equal to or greater than the threshold, the control unit 106 detects an input to the input area (key) corresponding to the character displayed on the display unit 103. Then, the display of characters corresponding to the input can be changed as a predetermined notification. That is, when the number of ambiguous inputs is greater than or equal to the threshold, the character assigned to the key on which the user is inputting changes. During the input operation, the user pays attention to the characters on the display unit 103 to be input at present so as not to make an erroneous input, and performs the input. Therefore, if the character corresponding to the key in contact with the pressed object is changed by the current input, the user can surely recognize the display change. In other words, it can be surely recognized that there is a tendency to perform input across a plurality of keys.

  In the present embodiment, when the number of ambiguous inputs is equal to or greater than the threshold, the control unit 106 changes the display of characters corresponding to the ambiguous input among the characters displayed on the display unit 103 as a predetermined notification. be able to. That is, when the number of ambiguous inputs is equal to or greater than the threshold value, the display of characters corresponding to the key touched by the pressed object in the ambiguous input changes. As a result, the user can grasp which key is likely to make an ambiguous input when performing an input, and particularly carefully input a key that is likely to make an ambiguous input. This leads to a decrease in erroneous input.

(Second Embodiment)
In the first embodiment, the case where the user visually recognizes the predetermined notification has been described. In the second embodiment, the case where the user recognizes the predetermined notification by hearing will be described. FIG. 6 is a functional block diagram showing a schematic configuration of the input device according to the second embodiment of the present invention. Examples of the input device 201 of the present invention include a PDA, a mobile phone, a mobile music player, a mobile TV, a bank ATM, and a station ticket machine. The input device 201 includes a touch panel 202 including a display unit 203 and an input detection unit 204, a storage unit 205, a control unit 206, and a sound output unit 207. The functional units 202 to 205 have the same functions as the functional units 102 to 105 in FIG.

  The sound output unit 207 converts the sound signal transmitted from the control unit 206 into sound and outputs it, and is, for example, a speaker.

  When the input detection unit 204 detects an input to a key, the control unit 206 determines whether or not the input is an input over a plurality of keys (input areas). When this input is an input across a plurality of keys (input areas), the control unit 206 determines that this input is an ambiguous input. The control unit 206 stores the number of ambiguous inputs in the storage unit 205, and performs a predetermined notification to the user when the number of ambiguous inputs exceeds a threshold value. The control unit 206 controls the sound output unit 207 to send a sound signal to the sound output unit 207 and output a sound as a predetermined notification. When the number of ambiguous inputs is equal to or greater than the threshold value, the voice output unit 207 outputs a sound, so that the user can be caused to recognize that there is a tendency to input across a plurality of keys.

  The operation of the input device of FIG. 6 will be described using the flowchart of FIG. 2 as in the first embodiment. Note that for the processing other than step S109 in FIG. 2, the processing in the first embodiment is performed in common with the operation of the second embodiment. In this case, among the descriptions regarding each step, the descriptions regarding each functional unit (touch panel 102, display unit 103, input detection unit 104, storage unit 105) of the first embodiment are appropriately described in each of the second embodiment. The functional units (touch panel 202, display unit 203, input detection unit 204, storage unit 205) are to be read. In the second embodiment, in S109, the control unit 206 controls the sound output unit 207 to output a sound as a predetermined notification. The user can recognize by hearing that there is a tendency to input across a plurality of keys depending on the presence or absence of sound.

  In addition, although the process of step S109 for performing the predetermined notification has been described as being performed after step S108, the timing of performing the predetermined notification is not limited to after S108 if the counter value is equal to or greater than the threshold value. Absent. For example, after S102, that is, when the input detection unit 204 detects an input to a key corresponding to a character displayed on the display unit 203, the sound output unit 207 is controlled to output a sound as a predetermined notification. You can also.

  Furthermore, although it has been described that the control unit 206 controls the sound output unit 207 to output a sound only when the number of ambiguous inputs is equal to or greater than a threshold value, the sound is output when the number of ambiguous inputs is less than the threshold value. The output unit 207 can also output sound. For example, after S102, when the number of ambiguous inputs is less than the threshold value, the control unit 206 can control the sound output unit 207 to output the first sound. At this time, when the number of ambiguous inputs is equal to or greater than the threshold, the control unit 206 controls the sound output unit 207 to output a second sound different from the first sound as a predetermined notification. That is, the user can recognize that there is a tendency that an input is made across a plurality of keys due to a change in sound, not the presence or absence of sound. For example, if a “click” sound is output as the first sound as shown in FIG. 7A and a “pea” sound is output as the second sound as shown in FIG. Can recognize changes in sound. The second sound has been described as being different from the first sound in terms of the type of sound. However, the second sound is not limited to this as long as the sound can be recognized by the user. For example, the first sound The second sound different from the sound can be different from the first sound depending on the volume of the sound and the number of sounds.

  In addition, although one threshold value was set and demonstrated as a reference | standard which outputs a sound or changes a sound, a threshold value is not limited to one. For example, the threshold value is provided in steps, and the control unit 206 controls the sound output unit 207 so that the volume of the sound increases or the sound type changes every time the counter value becomes equal to or greater than the threshold value. The sound can be changed step by step.

  As described above, in the present embodiment, the control unit 206 controls the sound output unit 207 to output a sound as a predetermined notification when the number of ambiguous inputs is equal to or greater than a threshold value. That is, a sound is output when the number of ambiguous inputs that are likely to cause erroneous input increases. Thereby, the user can recognize by hearing that there exists a tendency to perform the input over a some key. The user can prevent erroneous input caused by input across a plurality of keys by changing the way of pressing. As the number of erroneous input decreases, the efficiency of character input work increases. Recognizing the predetermined notification by hearing is particularly effective in situations where it is difficult to visually recognize the predetermined notification as in the first embodiment, for example, by using the input device in a dark place. .

  In the present embodiment, when the input detection unit 204 detects an input to the input area corresponding to the character, the control unit 206 outputs the first sound when the number of ambiguous inputs is less than the threshold value. Controlling the sound output unit 207 to control the sound output unit 207 to output a second sound different from the first sound as the predetermined notification when the number of the ambiguous inputs is equal to or greater than a threshold value. Can do. That is, the sound output from the sound output unit 207 changes at the threshold. As a result, the user can obtain feedback when the input is detected by the input detection unit 204 in any case. Therefore, it is possible to clearly recognize that the input has been detected without confirming the character displayed on the display unit 203 by the input. When the number of ambiguous inputs is equal to or greater than the threshold value, a second sound different from the first sound is output, so that it is possible to recognize by hearing that there is a tendency to input over a plurality of keys.

(Third embodiment)
In the second embodiment, the case where the user recognizes the predetermined notification by hearing is described, but in the third embodiment, the case where the user recognizes the predetermined notification by touch is described. FIG. 8 is a functional block diagram showing a schematic configuration of an input device according to the third embodiment of the present invention. Examples of the input device 301 of the present invention include a PDA, a mobile phone, a mobile music player, a mobile TV, a bank ATM, and a station ticket machine. The input device 301 includes a touch panel 302 including a display unit 303 and an input detection unit 304, a storage unit 305, a control unit 306, a load detection unit 308, and a tactile sensation providing unit 309. The functional units 302 to 305 have the same functions as the functional units 102 to 105 in FIG.

  The load detection unit 308 detects a pressing load on the input detection unit 304, and is configured using an element that linearly reacts to a load such as a strain gauge sensor or a piezoelectric element, for example.

  The tactile sensation providing unit 309 vibrates the input detection unit 304 and presents a tactile sensation to a user's finger or stylus pen (pressed object) pressing the input detection unit 304. For example, a vibration element such as a piezoelectric element It is configured using. The tactile sensation to be presented may be any vibration, and the frequency, period (wavelength), amplitude, and waveform can be appropriately set according to the tactile sensation to be presented. Further, examples of a more realistic tactile sensation that improves a user's operational feeling include a tactile hard tactile sensation, a soft tactile sensation such as bull or buni, and a tactile sensation that can be recognized as vibration such as bull. A clicked hard tactile sensation can be realized by, for example, presenting a sine wave of 200 Hz to 500 Hz for one period or a rectangular wave for one period. A soft tactile sensation such as bull or beech can be realized by, for example, presenting a sine wave of 200 Hz to 500 Hz for two or three periods. A tactile sensation that can be recognized as a vibration such as a bull can be realized by, for example, presenting a sine wave for four cycles or more. When the load detection unit 308 and the tactile sensation presentation unit 309 are configured using piezoelectric elements, the load detection unit 308 and the tactile sensation presentation unit 309 can be configured by sharing the piezoelectric elements. This is because the piezoelectric element generates electric power when pressure is applied and deforms when electric power is applied.

  When the input detection unit 304 detects an input to a key, the control unit 306 determines whether the input is an input that spans a plurality of keys (input areas). When this input is an input across a plurality of keys (input areas), the control unit 306 determines that this input is an ambiguous input. The control unit 306 stores the number of ambiguous inputs in the storage unit 305, and performs a predetermined notification to the user when the number of ambiguous inputs exceeds a threshold value. The control unit 306 controls the tactile sensation providing unit 309 to present a tactile sensation to the pressed object that is pressing the input detection unit 304 as a predetermined notification. When the number of ambiguous inputs is equal to or greater than the threshold value, the tactile sensation can be presented to allow the user to recognize by tactile sense that there is a tendency to input across multiple keys.

  Furthermore, the control unit 306 can accept an input detected by the input detection unit 304 when the pressing load detected by the load detection unit 308 satisfies the load standard. In the description of the first or second embodiment, when an input is detected by the input detection unit 104 or 204, the input is confirmed, and characters corresponding to the input are displayed on the display unit 104 or 204. However, in the present embodiment, by providing a load reference for accepting an input, when the input is detected by the input detection unit 304, the input is not finalized and becomes a temporary input state. Only after the pressing load related to the input satisfies the load standard, the input is confirmed, and characters corresponding to the input are displayed on the display unit 303. That is, if the pressing load does not satisfy the load standard, it is considered that no input has been made. When the received input is an input that spans a plurality of keys (input areas), the control unit 306 determines that the input is an ambiguous input. The control unit 306 stores the number of ambiguous inputs in the storage unit 305, and performs a predetermined notification to the user when the number of ambiguous inputs exceeds a threshold value. The control unit 306 changes a load reference for receiving an input as a predetermined notification. For example, the control unit 306 changes (increases) the load reference from the load reference 1 to the load reference 2 as shown in FIG. When the load reference for accepting input changes, the pressing load necessary for pressing the key to display characters on the display unit 303 changes. Taking FIG. 9 as an example, when the number of ambiguous inputs is equal to or greater than a threshold, the user needs to press the key with a greater force to accept the input. As a result, the user feels that the key has become heavy. Therefore, the control unit 306 can cause the user to recognize by tactile sense that the input over a plurality of keys tends to be performed by changing the load reference.

  The operation of the input device in FIG. 8 will be described using the flowchart in FIG. 2 as in the first embodiment. Note that for the processing other than step S109 in FIG. 2, the processing in the first embodiment is performed in common in the operation of the third embodiment. In this case, among the descriptions relating to each step, the descriptions relating to each functional unit (touch panel 102, display unit 103, input detection unit 104, storage unit 105) of the first embodiment are appropriately described in each of the third embodiment. The functional units (touch panel 302, display unit 303, input detection unit 304, and storage unit 305) should be read. In the third embodiment, in S109, the control unit 306 controls the tactile sensation providing unit 309 so as to present a tactile sensation with respect to the pressed object, or changes a load reference for receiving an input. The control unit 306 can both present the tactile sensation and change the load standard. The user can recognize by tactile sense that there is a tendency to input across a plurality of keys based on the presence or absence of a tactile sensation or a change in pressing load necessary to accept an input.

  In addition, although the process of step S109 for performing the predetermined notification has been described as being performed after step S108, the timing of performing the predetermined notification is not limited to after S108 if the counter value is equal to or greater than the threshold value. Absent. For example, after S102, that is, when the input detection unit 304 detects an input to a key corresponding to a character displayed on the display unit 303, as a predetermined notification, a tactile sensation is presented so as to present a tactile sensation to the pressed object. It is also possible to control the unit 309 and change the load reference for receiving input.

  Furthermore, although it has been described that the control unit 306 controls the tactile sensation providing unit 309 so as to present a tactile sensation only when the number of ambiguous inputs is equal to or greater than the threshold value, it is pressed when the number of ambiguous inputs is less than the threshold value. A tactile sensation can also be presented to an object. For example, after S102, when the number of ambiguous inputs is less than the threshold, the control unit 306 presents the tactile sensation providing unit 309 so as to present the first tactile sensation to the pressed object that is pressing the input detection unit 304. Can be controlled. At this time, when the number of times of ambiguous input is equal to or greater than the threshold, the control unit 306 provides a second tactile sensation different from the first tactile sensation as a predetermined notification with respect to the pressed object that is pressing the input detection unit 304. The tactile sensation providing unit 309 is controlled so as to present. That is, the user can recognize that the input over a plurality of keys tends to be performed based on the change in tactile sensation, not the presence or absence of tactile sensation. For example, if the tactile sensation “Bull” is presented as the first tactile sensation as shown in FIG. 10A and the tactile sensation “Bull Bull” is presented as the second tactile sensation as shown in FIG. Change in tactile sensation can be recognized. The second tactile sensation has been described as different from the first sound in terms of the number of tactile sensations. However, the second tactile sensation is not limited to this as long as the tactile sensation can be recognized by the user. The second tactile sensation different from the tactile sensation can be different from the first tactile sensation depending on the type of tactile sensation and the magnitude of the tactile sensation.

  In addition, the control unit 306 can change the load reference along with the tactile sensation. For example, depending on whether or not the number of ambiguous inputs satisfies a threshold value, the control unit 306 presents a tactile sensation as shown in FIG. 10 to the pressed object and receives a load as shown in FIG. When t is changed, the tactile sensation felt by the user is as shown in FIG. When the user inputs to the key, if the number of ambiguous inputs does not satisfy the threshold, the user feels a “bull” feel and the user feels the key light. When the number of ambiguous inputs satisfies the threshold value, the user feels “tumble” and the user feels that the key is heavy.

  In addition, although one threshold value was set and demonstrated as a reference | standard which shows a tactile sensation, changes a tactile sensation, or changes a load reference | standard, a threshold value is not limited to one. For example, the threshold value is provided in stages, and the control unit 306 controls the tactile sensation providing unit 309 so that the size of the tactile sensation increases or the type of tactile sensation changes each time the counter value becomes equal to or greater than the threshold value. Can do. Further, every time the value of the counter becomes equal to or greater than the threshold value, the control unit 306 can change the load standard for accepting input so that the weight of the key feels heavy.

  As described above, in the present embodiment, when the number of ambiguous inputs is equal to or greater than the threshold, the control unit 306 provides a tactile sensation so as to present a tactile sensation to the pressed object that is pressing the input detection unit 304 as a predetermined notification. The presenter 309 is controlled. That is, a tactile sensation is presented when the number of ambiguous inputs that are likely to cause erroneous input increases. Thereby, the user can recognize by touch that there is a tendency to perform input across a plurality of keys. The user can prevent erroneous input caused by input across a plurality of keys by changing the way of pressing. As the number of erroneous input decreases, the efficiency of character input work increases. Recognizing a predetermined notification by touch is particularly effective in situations where it is difficult to output a sound as a predetermined notification as in the second embodiment, for example, by using an input device in a public place. To do.

  In the present embodiment, when the input detection unit 304 detects an input to the input area corresponding to the character, the control unit 306 presses the input detection unit 304 when the number of ambiguous inputs is less than the threshold value. When the tactile sensation providing unit 309 is controlled so as to present the first vibration to the pressed object, and the number of times of ambiguous input is equal to or greater than the threshold value, as a predetermined notification, On the other hand, the tactile sensation providing unit 309 can be controlled so as to present a second vibration different from the first vibration. That is, the tactile sensation presented by the tactile sensation providing unit 309 changes with the threshold as a boundary. As a result, the user can obtain feedback when the input is detected by the input detection unit 304 in any case when the input is performed. Therefore, it is possible to clearly recognize that the input has been detected without confirming the character displayed on the display unit 303 by the input. When the number of ambiguous inputs is equal to or greater than the threshold value, a second tactile sensation different from the first tactile sensation is presented.

  In the present embodiment, when an input to the key is detected, the control unit 306 causes the tactile sensation providing unit 309 to press the mechanical key to increase the user's operational feeling, not just vibration. A clicked hard feel (real click feeling) can be presented on the pressed object. The input detection unit 304 itself does not physically displace like a mechanical key even when pressed, but when the user operates a mechanical key by presenting the tactile sensation as described above to the pressed object You can get the same realistic click feeling. Thereby, the user can perform an input operation to the touch panel that does not originally have feedback by pressing without a sense of incongruity.

  In the present embodiment, when the pressing load detected by the load detection unit 309 satisfies the load standard, the control unit 306 receives an input detected by the input detection unit 304, and the received input spans a plurality of input areas. In the case of an input, the input is determined to be an ambiguous input, and when the number of ambiguous inputs is equal to or greater than a threshold value, the load standard can be changed as a predetermined notification. That is, the pressing load required to press the key and display the characters on the display unit 303 changes with the threshold as a boundary. As a result, the user feels that the key has become heavier (lighter). Thereby, it can be recognized by a tactile sense that there is a tendency to input over a plurality of keys.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention.

  For example, functions included in each member, each means, each step, etc. can be rearranged so as not to be logically contradictory, and a plurality of means, steps, etc. can be combined or divided into one. Is possible.

  In the above embodiment, when the number of ambiguous inputs is equal to or greater than the threshold, the control unit has been described as performing a predetermined notification to the user. When the ratio between the total number of inputs and the ambiguous input is equal to or greater than the threshold, the control unit can also make a predetermined notification to the user. If the timing of performing a predetermined notification is set to be when the number of ambiguous inputs, which is an absolute number, exceeds a threshold value, once the number of ambiguous inputs exceeds the threshold value, the predetermined notification is always made for subsequent inputs. Will be done. That is, even if the user changes the way of pushing and does not make ambiguous input, the predetermined notification is continued. Therefore, a process of counter initialization is required. On the other hand, when the timing for performing the predetermined notification is set when the ratio between the total number of inputs and the ambiguous input exceeds the threshold, even if the ratio once exceeds the threshold, if the clear input continues thereafter, the ratio is It becomes less than the threshold value, and the predetermined notification is not performed. In other words, when the user changes the way of pressing and does not make an ambiguous input, the corresponding notification is lost. A process for initializing the counter is also unnecessary.

  In the above embodiment, the input device having the touch panel has been described. However, the inventions according to the second embodiment and the third embodiment are not limited to the input device having the touch panel. The present invention can be applied to any input device including a mechanical key (or button) for detecting an input by a user instead of the touch panel and a display for displaying a character corresponding to the detected input. . Examples of such an input device include a personal computer having a mechanical key (for example, a keyboard and a numeric keypad), a mobile phone, a credit card terminal, and the like. For example, when applied to a mobile phone as shown in FIG. 12, the display unit 203 or 303 according to the above-described embodiment is a mobile phone display 403, and the input detection unit 204 or 304 is a mobile phone mechanical key 404, respectively. Correspond.

101, 201, 301 Input device 102, 202, 302 Touch panel 103, 203, 303 Display unit 104, 204, 304 Input detection unit 105, 205, 305 Storage unit 106, 206, 306 Control unit 207 Sound output unit 308 Load detection unit 309 Touch display section 403 Display 404 key

Claims (9)

A display unit;
An input detection unit for detecting an input to the input area corresponding to the character;
-When the input detected by the input detection unit is an input that spans a plurality of input areas, the input is determined to be an ambiguous input,
-If the number of ambiguous inputs is greater than or equal to a threshold value, a predetermined notification is given to the user;
A control unit;
An input device comprising: The input device according to claim 1,
The input detection unit detects an input to an input area corresponding to a character displayed on the display unit,
When the number of times of ambiguous input is equal to or greater than a threshold, the control unit changes the display of characters displayed on the display unit as the predetermined notification.
An input device characterized by that. The input device according to claim 2, wherein the control unit includes:
When the number of ambiguous inputs is equal to or greater than a threshold, when the input detection unit detects an input to the input area corresponding to the character displayed on the display unit, the predetermined notification Change the display of characters,
An input device characterized by that. The input device according to claim 2, wherein the control unit is
When the number of ambiguous inputs is equal to or greater than a threshold, the input device changes the display of characters corresponding to the ambiguous input among the characters displayed on the display unit as the predetermined notification. The input device according to claim 1, further comprising:
It has a sound output unit that outputs sound,
When the number of ambiguous inputs is greater than or equal to a threshold value, the sound output unit is controlled to output a sound as the predetermined notification. The input device according to claim 5, wherein the control unit includes:
When the input detection unit detects an input to the input area corresponding to the character,
-If the number of ambiguous inputs is less than a threshold, control the sound output unit to output a first sound;
-When the number of ambiguous inputs is equal to or greater than a threshold, the sound output unit is controlled to output a second sound different from the first sound as the predetermined notification;
An input device characterized by that. The input device according to claim 1, further comprising:
A tactile sensation providing unit that provides a tactile sensation with respect to the pressed object that is pressing the input detection unit;
The control unit controls the tactile sensation providing unit to present a tactile sensation to a pressed object that is pressing the input detection unit as the predetermined notification when the number of ambiguous inputs is equal to or greater than a threshold value. An input device characterized by that. The input device according to claim 7,
When the input detection unit detects an input to the input area corresponding to the character, the control unit,
-When the number of ambiguous inputs is less than a threshold value, the tactile sensation providing unit is controlled so as to present a first tactile sensation with respect to a pressed object that is pressing the input detection unit;
-When the number of times of ambiguous input is greater than or equal to a threshold value, the predetermined notification is such that a second tactile sensation different from the first tactile sensation is presented to the pressed object pressing the input detection unit. Control the tactile sensation presentation part,
An input device characterized by that. The input device according to claim 1, further comprising:
A load detection unit for detecting a pressing load on the input detection unit;
The controller is
-When the pressing load detected by the load detection unit satisfies a load standard, the input detected by the input detection unit is accepted,
-If the received input is input across multiple input areas, the input is determined to be ambiguous;
-If the number of ambiguous inputs is greater than or equal to a threshold, the load criterion is changed as the predetermined notification;
An input device characterized by that.

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