JP6006487B2 - Input device - Google Patents

Description

  The present invention relates to an input device for an electronic device, and more particularly to a technique for adjusting the sensitivity of input detection of a capacitive touch sensor.

  Conventionally, there has been proposed an input device that performs an input operation using a fingertip with respect to an operation unit on which a plurality of pressing sensitivity points are formed (see Patent Document 1).

JP 2010-72678 A

  However, the input device described in Patent Document 1 assumes an input operation using one finger of a human hand and does not assume an input using a plurality of fingers. Therefore, when detecting an input operation using a plurality of fingers, differences in the thickness and shape of the operator's fingers, characteristics of the input operation, and the like are not considered. Assuming a capacitance-type PC (Personal Computer) keyboard device that performs an input operation using all fingers of both hands, for example, there are the following problems.

  First, since each finger of a human hand is different in thickness and shape, the sensitivity of input detection of the touch sensor is different for each finger. That is, since the little finger is thinner than the index finger, middle finger, and ring finger, the contact area between the little finger and the input operation surface in the input operation is smaller than the contact area between the index finger, the middle finger, and the ring finger and the input operation surface. Become. Although the thumb is thicker than the index finger, middle finger, and ring finger, it is common to perform the space key input operation using the side of the thumb, so the side of the thumb and the input operation surface in the input operation Is smaller than the contact area between the index finger, the middle finger, and the ring finger and the input operation surface. Therefore, there is a problem that some operators feel that the input is difficult to detect in the input operation on the side of the little finger or thumb.

  Secondly, the keyboard device is characterized by an input operation of inputting by touch typing. That is, when performing continuous character input using touch typing, an operator of the keyboard device touches only the finger to be input from the home position state, and other fingers do not touch the input operation surface. Need to be kept in a constantly floating state. Here, the little finger has a weaker holding force than other fingers, and it is possible that the little finger will touch the input operation surface unintentionally while inputting with another finger, and erroneous input may occur. There is. Therefore, there is a problem that some operators have to pay more attention than necessary so that the little finger does not approach the input operation surface.

  The present invention has been made in view of the above problems, and provides an input device capable of performing sensitivity adjustment of input detection in consideration of the thickness and shape of an operator's finger, input operation characteristics, and the like. The task is to do.

In order to solve the above problems, an input device according to the present invention includes a flat input operation surface provided with a plurality of character symbols, and an input including a plurality of touch sensors for detecting a change in electric capacity of the input operation surface. In the apparatus, a storage unit that stores input determination information in units of areas obtained by dividing the input operation surface into a plurality of areas, and an area to which the touch sensor that has detected a change in capacitance belongs belong to the area. And an input determination unit that acquires corresponding input determination information from the storage unit and determines whether or not the character symbol is input using the acquired input determination information.
Here, the area is divided according to a contact area between a part of the input operator's body in the input operation and the input operation surface, or one of the input operator's bodies in the input standby stage. And the input operation surface are divided according to the probability of unintentional contact.
In the former case, for example, the detection sensitivity of the first area with a small contact area may be set higher than the detection sensitivity of the second area with a contact area wider than the first area. In the latter case, for example, the detection sensitivity of the first area where the probability of unintentional contact is high is changed to the detection sensitivity of the second area where the probability of contact unintentionally is lower than the first area. It is better to set it lower.

  According to the present invention, it is possible to eliminate difficulty in an input operation due to differences in the thickness and shape of an operator's finger, characteristics of the input operation, and the like.

It is a figure for demonstrating the structure of the input device which concerns on embodiment, (a) is a top view, (b) is a front view, (c) is a right view. It is a block diagram which shows the internal structure of the input device which concerns on embodiment. In an input device concerning an embodiment, it is a figure for explaining an area set up on an input operation side. It is a figure for demonstrating the effect of the input device which concerns on embodiment. 5 is an example of a flowchart of an operation of setting input determination information (threshold value) in the input device according to the embodiment. 5 is an example of a flowchart of an operation for determining an input operation in the input device according to the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each figure is only schematically shown so that the present invention can be fully understood. Therefore, the present invention is not limited to the illustrated example. In the drawings to be referred to, dimensions of members constituting the present invention may be exaggerated for clarity of explanation. In addition, in each figure, about the same component or the same component, the same code | symbol is attached | subjected and those overlapping description is abbreviate | omitted.

<External structure of input device>
First, the external structure of the input device according to the embodiment will be described with reference to FIG. In the present embodiment, the keyboard device 10 is described as an example of the input device, but the type of the input device is not limited to this. Details will be described in a modification.

  The keyboard device 10 is an electrostatic capacitance type PC keyboard device. The keyboard device 10 mainly includes a flat input operation surface 11 and a case portion 12. The input operation surface 11 is provided with a plurality of sections 11a (only a part of which is shown) corresponding to the key caps of a mechanical keyboard in which keys are arranged in a QWERTY layout. Each section 11a is used to identify the section 11a. The character symbol 11b is attached by means such as printing. The section 11a may be visible to the operator or may not be visible to the operator. The case unit 12 includes a main part of the keyboard device 10 such as a mechanism for determining an input operation of the character symbol 11b when the operator of the keyboard device 10 touches the input operation surface 11 with a part of a body such as a finger. Is stored. The mechanism housed in the case part 12 will be described with reference to FIG.

<< Internal structure of input device >>
Next, the internal structure of the input device according to the embodiment will be described with reference to FIG. The internal structure shown in FIG. 2 is housed inside the case portion 12. A keyboard device 10 serving as an input device detects that a part of a body such as a finger has touched the input operation surface 11, and outputs the detected information to the control circuit unit 2 as detection information, and an operation unit 1 is input, and the control circuit unit 2 determines whether or not the contact with the input operation surface 11 is an input operation.

  The capacitive touch sensor 3 constituting the operation unit 1 is provided for each section 11a shown in FIG. 1, and detects a change in capacitance caused by contact of a part of a body such as a finger in the section 11a. To do. Thereby, each section 11a functions as a key switch. For example, the touch sensor 3 is provided on a substrate (not shown) disposed inside the input operation surface 11 so as to be positioned immediately below each of the sections 11a.

  The input detection circuit 4 constituting the operation unit 1 outputs the position of the touch sensor 3 that has detected the change in capacitance and the amount of change in the capacitance (the response value of the touch sensor) to the control circuit unit 2 as detection information. To do. Note that the input detection circuit 4 may perform A / D conversion and output to the control circuit unit 2 as a digital value when the change in capacitance detected by the touch sensor 3 is an analog value.

  The control circuit unit 2 can be configured as a known microcomputer system including a central processing unit, a memory, an input / output circuit, and the like. At this time, the storage unit 5 and the detection information processing unit 6 provided as the constituent elements of the control circuit unit 2 can be implemented by any hardware or software, or a combination thereof, as long as the function in the present description is achieved. .

First, the memory | storage part 5 which comprises the control circuit part 2 is demonstrated. The storage unit 5 stores area division information 51 and input determination information 52.
The area division information 51 stored in the storage unit 5 is information related to an area obtained by dividing the input operation surface 11 (see FIG. 1) into a plurality of areas. The area is, for example, the size of the contact area between a part of the body of the input operator such as the finger of the input operator and the input operation surface 11 (see FIG. 1) in the input operation, A part and the input operation surface 11 (see FIG. 1) are divided according to the probability that the operator makes an unintentional contact.

In the following, a case where the input operation surface 11 is divided into two areas (area A and area B) (area division) will be described as an example with reference to FIG.
First, consider a case where an area is divided according to the size of the contact area. An area A shown in FIG. 3 is a section 11a in which an input operation is performed using the index finger, middle finger, and ring finger when the character symbol 11b is input by touch typing. For example, the character symbol 11b is “W”, “S”. And so on belongs to the section 11a. On the other hand, an area B shown in FIG. 3 is a section 11a in which an input operation is performed using the side portion of the thumb and the little finger when the character symbol 11b is input by touch typing. For example, the character symbol 11b is “Q”. , “A”, “space”, etc. belong to the section 11a.

  In the input operation, the section 11a belonging to the area A is contacted by the abdomen of the index finger, middle finger, and ring finger, and the section 11a belonging to the area B is contacted by the abdomen of the little finger or the side of the thumb. Here, since the little finger is thinner than the index finger, the middle finger, and the ring finger, the contact area between the little finger and the input operation surface 11 in the input operation (hereinafter sometimes referred to as “the little finger contact area”) is the index finger, the middle finger. And the contact area between the ring finger and the input operation surface 11 (hereinafter, referred to as “contact area such as index finger” in some cases) is narrower. In addition, although the thumb is thicker than the index finger, middle finger, and ring finger, the space key input operation is generally performed using the side portion of the thumb. Therefore, in the input operation using the thumb, the contact area between the side portion of the thumb and the input operation surface 11 (hereinafter sometimes referred to as “thumb contact area”) includes the index finger, the middle finger, the ring finger, and the input operation surface 11. It becomes narrower than the contact area (contact area such as the index finger).

  Therefore, even when the input operation is performed with the index finger, the middle finger, or the ring finger, the touch sensor 3 detects the change in capacitance detected by the touch sensor 3 when the input operation is performed with the side of the thumb or the little finger. It becomes smaller compared to the change in capacitance. As a result, it is good when the center of the touch sensor 3 is touched, but when a part slightly touched from the center of the touch sensor 3 is touched, an input is detected when touching with the index finger, middle finger, or ring finger. However, if the side of the thumb or the little finger touches, the input will not be detected, which may cause the operator to feel that the input is difficult to detect in the input operation on the side of the little finger or thumb. Become one. In this embodiment, considering that the little finger contact area and the thumb contact area tend to be the same, the section 11a located almost immediately below the operator's thumb and little finger is divided into area B. ing.

  Secondly, a case is considered in which division is performed according to the probability that a part of the body of the input operator such as a finger of the input operator and the input operation surface 11 come into contact unintentionally in the input standby stage. The operator of the keyboard device 10 touches the input operation surface 11 only with the finger used for the input operation from the home position state when the character symbol 11b is continuously input using touch typing, and the other fingers perform the input operation. It is necessary to keep the surface 11 in a constantly floating state so as not to touch the surface 11. Here, the little finger is weaker than the other finger to hold, and the probability that the little finger will touch the input operation surface 11 unintentionally while inputting with the other finger is that The probability of unintentionally touching the input operation surface 11 is high.

  Therefore, when the character symbol 11b is input by touch typing, the area to which the section 11a located almost immediately below the little finger of the operator in the input standby stage belongs and the character symbol 11b is input by touch typing. An area to which the section 11a located almost immediately below the finger other than the person's little finger belongs is divided. Here, the area to which the section 11a located almost immediately below the little finger belongs is generally included in the area B shown in FIG. 3, and the area to which the section 11a located almost directly below the finger other than the little finger belongs is an area shown in FIG. It can be seen that A is generally included. This is due to the characteristics of touch typing.

  In the present embodiment, the complexity of dividing the area too much, the contact area when an arbitrarily assumed operator performs an input operation, the probability that the little finger touches the input operation surface 11 unintentionally, etc. In consideration of the area division (area A, area B) shown in FIG. 3, this is merely an example of area division. Therefore, area division may be performed using a method other than the area division described above, and some sections 11a belonging to area A shown in FIG. It is also possible to include the section 11a in the area A. Further, the area to which the section 11a located almost directly below the finger other than the operator's little finger belongs and the area to which the section 11a located almost directly below the finger other than the little finger belongs are set separately from the areas A and B shown in FIG. It is also possible to do. Details of other area divisions will be described in a modification.

  Thereby, when the operator of the keyboard device 10 according to the present embodiment feels that the input operation of the side portion of the thumb or the little finger is difficult to detect, the setting is made to increase the detection sensitivity of the area B (the threshold value Bj of the area B described later) Set to a lower value. On the other hand, when the operator of the keyboard device 10 unintentionally touches the input operation surface and feels that an erroneous input occurs, the setting of lowering the detection sensitivity of area B (setting the threshold value Bj of area B described later high) Do). Therefore, the keyboard device 10 according to the present embodiment can perform input detection sensitivity adjustment in consideration of the thickness and shape of the operator's finger, the characteristics of the input operation, and the like. A method for adjusting the detection sensitivity of the area of the keyboard device 10 will be described later.

  Returning to FIG. 2, the input determination information 52 stored in the storage unit 5 includes a threshold for determining whether or not the change in capacitance detected by the touch sensor 3 is due to an input operation in units of areas. Is done. In this embodiment, since the input operation surface 11 is divided into the area A and the area B, the input determination information 52 includes the threshold value Ai of the area A and the threshold value Bj of the area B. The input determination information 52 may be tabular data.

  The threshold value Ai of the area A can be adjusted in N (N is a positive integer) stages (for example, five stages A1, A2, A3, A4, and A5). On the other hand, the threshold value Bj of the area B can be adjusted in M (M is a positive integer) level (for example, B1, B2, B3, B4, B5). The threshold value Ai and the threshold value Bj may be set completely independently of each other, or the threshold value Bj may be adjustable in M stages by several percent with respect to the threshold value Ai. Further, the number of steps “N” of the threshold Ai and the number of steps “M” of the threshold Bj may be different from each other, and the threshold change amount (sensitivity change amount) per step is different from each other. Also good. Details will be described in a modification. The threshold value Ai and the threshold value Bj are set by the input determination information setting unit 61 described later.

Then, the detection information processing part 6 which comprises the control circuit part 2 is demonstrated. The detection information processing unit 6 includes an input determination information setting unit 61 and an input determination unit 62.
The input determination information setting unit 61 constituting the detection information processing unit 6 sets (selects) one of the threshold value Ai of the area A and the threshold value Bj of the area B from a plurality of stages based on the input of the operator. Here, in the present embodiment, the steps of the threshold value Ai and the threshold value Bj correspond to the input of a specific character symbol 11b. Below, the case where the threshold value Ai and the threshold value Bj are both five steps will be described as an example, and the correspondence between the threshold value Ai and the threshold value Bj and the input of a specific character symbol 11b will be described.

  The threshold A1 corresponds to simultaneous input of two character symbols 11b “cl” + “Q”, the threshold A2 corresponds to simultaneous input of two character symbols 11b “cl” + “W”, and the threshold A3 corresponds to two characters. Symbol 11b “cl” + “E” corresponds to simultaneous input, threshold A4 corresponds to two character symbols 11b “cl” + “R” simultaneous input, and threshold A5 corresponds to two character symbols 11b “cl” + Supports simultaneous input of “T”. The threshold value B1 corresponds to simultaneous input of two character symbols 11b “cl” + “A”, the threshold value B2 corresponds to simultaneous input of two character symbols 11b “cl” + “S”, and the threshold value B3 is 2 The threshold B4 corresponds to the simultaneous input of two character symbols 11b “cl” + “F”, and the threshold B5 corresponds to the two character symbols 11b “cl”. "+ G" simultaneous input.

The input determination unit 62 constituting the detection information processing unit 6 refers to the area division information 51 stored in the storage unit 5 and the position of the touch sensor 3 that has detected the change in the capacitance is in any area (area A or A threshold value (threshold value Ai or threshold value Bj) corresponding to the area determined by referring to the input determination information 52 stored in the storage unit 5 and the capacitance change amount (touch sensor If the amount of change in capacitance (response value of the touch sensor) is larger than the threshold value, the input operation of the character symbol 11b corresponding to the touch sensor 3 that has detected the change in capacitance is performed. It is determined that On the other hand, if the amount of change in capacitance (the response value of the touch sensor) is smaller than the threshold value, it is determined that the input operation of the character symbol 11b corresponding to the touch sensor 3 that has detected the change in capacitance has not been performed. Then, when the input determination unit 62 determines that the input operation of the character symbol 11b has been performed, information on the position of the touch sensor 3 that has detected a change in capacitance with respect to the PC 20 to which the keyboard device 10 is connected. Is output.
Above, description of the structure of the keyboard apparatus 10 as an input device is complete | finished.

≪Operation of input device≫
<Threshold setting>
With reference to FIG. 5 (refer to FIG. 2 as appropriate), the setting operation of the threshold value Ai of area A and the threshold value Bj of area B in the keyboard device 10 as an input device will be described.
First, the input determination information setting unit 61 determines whether or not the operator of the keyboard device 10 has simultaneously input two character symbols 11b “cl” + “Q” (step S1). When simultaneous input of 11b “cl” + “Q” is performed, the threshold value A1 is set (step S2). Next, when “No” is determined in step S1, it is determined whether or not the two character symbols 11b “cl” + “W” are simultaneously input (step S3), and the simultaneous input is performed. Is set to the threshold value A2 (step S4). Thereafter (step S5 to step S20), the same processing is performed. Then, which threshold is set (step S2, step S4, step S6, step S8, step S10, step S12, step S14, step S16, step S18, step S20), or “No” in step S19. If it is determined that, the process ends.

<Determination of input operation>
Next, with reference to FIG. 6 (see FIG. 2 as appropriate), the determination operation of the input operation in the keyboard device 10 as the input device will be described.
First, the input determining unit 62 refers to the area division information 51 stored in the storage unit 5 to determine whether or not the position of the touch sensor 3 that has detected a change in capacitance belongs to the area A (step S1). S101). The input determination unit 62 acquires the threshold value Ai from the storage unit 5 when the position of the touch sensor 3 belongs to area A (step S102). On the other hand, when the position of the touch sensor 3 does not belong to area A (in area B) If it belongs, the threshold value Bj is acquired from the storage unit 5 (step S103). Next, the input determination unit 62 determines whether or not the amount of change in capacitance (touch sensor response value) is greater than the threshold value Ai acquired in step S102 or the threshold value Bj acquired in step S103. If the amount of change in capacitance (response value of the touch sensor) is larger than the threshold value, an input operation is detected (step S105). When the keyboard device 10 detects an input operation, the keyboard device 10 outputs input information to the PC 20 to which the keyboard device 10 is connected. On the other hand, if the amount of change in capacitance (the response value of the touch sensor) is not larger than the threshold value (if smaller), the process is terminated.
Above, description of operation | movement of the keyboard apparatus 10 as an input device is complete | finished.

  As described above, the keyboard device 10 as an input device according to the present embodiment can set thresholds (threshold Ai, threshold Bj) for determining an input operation in units of areas (area A, area B). . Specifically, the keyboard device 10 is configured to increase the detection sensitivity of the corresponding area B when the operator feels that the input operation of the side portion of the thumb or the little finger is difficult to detect (the threshold value Bj of the area B is set low). Do). The effect of this embodiment will be described with reference to FIG. The horizontal axis in FIG. 4 is the distance from the center of the touch sensor 3, and the vertical axis is the reaction value of the touch sensor 3.

  Here, it is assumed that the input operation with the index finger and the input operation with the little finger are determined with the same threshold value (for example, threshold value A3 in FIG. 4), and the operator touches a portion that is a little away from the center of the touch sensor 3. Assuming that In this case, even if the center of gravity of the contact surface of the little finger deviates from the center of the touch sensor 3, the input is detected (reaction value> threshold), and the allowable range (about 5.5 mm) is the center of gravity of the contact surface of the index finger. Is smaller than the permissible range (about 6.5 mm) where the input is detected even when the touch sensor 3 deviates from the center of the touch sensor 3 (reaction value> threshold). Therefore, when touching a part that is a little away from the center of the touch sensor 3, input is detected when touching with the index finger (reaction value> threshold), but input is detected when touching with the little finger. Not (response value <threshold).

  On the other hand, by setting the threshold value B5 of the area B lower than the threshold value A3 of the area A, the center of gravity of the contact surface of the little finger is touched when the operator touches a portion that is a little away from the center of the touch sensor 3. Even if the touch sensor 3 deviates from the center of the touch sensor 3, the input is detected (reaction value> threshold), and the center of gravity of the contact surface of the index finger deviates from the center of the touch sensor 3. However, it can be made wider than the allowable range (about 6.5 mm) where the input is detected (reaction value> threshold).

  In addition, the value a from the maximum value of the capacitance change amount (touch sensor response value) of the index finger to the threshold value A3 and the maximum value of the capacitance change amount (touch sensor response value) of the little finger are set to the threshold value B5. The value b up to is almost the same. Therefore, the timing when the input is determined when the index finger and the little finger are brought close to the touch sensor 3 is substantially the same.

On the other hand, if the operator unintentionally touches the input operation surface and feels that an erroneous input has occurred, a setting can be made to lower the detection sensitivity of area B (the threshold Bj of area B is set higher). . As a result, the value from the maximum value to the threshold value of the amount of change in capacitance (touch sensor response value) in the little finger can be reduced. For example, by changing the threshold value B5 to the threshold value B4, the value b is changed to the value c. Therefore, it is possible to delay the timing at which the input is determined when the little finger is brought close to the touch sensor 3.
As described above, the keyboard device 10 as the input device according to the present embodiment can adjust the sensitivity of input detection in consideration of the thickness and shape of the operator's finger, the characteristics of the input operation, and the like.

≪Modification≫
As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can implement in the range which does not change the meaning. The modification of embodiment is shown below.

(Input device)
In the embodiment, the keyboard device 10 has been described as an example of the input device, but the type of the input device is not limited to this. For example, tablet electronic computers, multifunctional mobile phones, electronic devices for remote operation (remote controllers), electronic desk calculators, vending machines for admission tickets and tickets, automated teller machines (ATMs), etc. It can also be applied to electronic devices.

(area)
In the embodiment, considering that the little finger contact area and the thumb contact area tend to be the same, the input operation is performed using the index finger, the middle finger, and the ring finger when the character symbol 11b is input by touch typing. It is divided into the area A to which the section 11a belongs and the area B to which the section 11a to which the input operation is performed using the side portion of the thumb or the little finger when inputting the character symbol 11b by touch typing. You may subdivide for every finger. Moreover, the area division which reflected the tendency difference of input operation of a right and left hand may be sufficient.

  In the embodiment, the area division is performed assuming touch typing as the input operation. However, by default, several patterns of area divisions are set in advance, and an arbitrary area can be set according to the preference of the keyboard device 10 operator. The configuration may be such that division can be selected. Further, the tendency of the input operation of the operator of the keyboard device 10 (input value tendency) is accumulated in the storage unit 5, and the optimum area division or area division is automatically selected according to the accumulated result. May be. Furthermore, the shape of the area (boundary of each area) may be set (formed) freely by the operator of the keyboard device 10.

(Input judgment information)
The threshold values constituting the input determination information (the threshold value Ai for area A and the threshold value Bj for area B) may be adjustable in M stages by several percent each with respect to the threshold value Ai for area B. For example, when the threshold value Ai of the area A is “3”, the threshold value Bj of the area B is an adjustment range of “3.1”, “3.3”, “3.5”, “3.6”, “3.7”, and “4”. May not be exceeded. Further, the threshold value Ai of area A (or the threshold value Bj of area B) is defined as a region where rough adjustment is performed for all operation regions of the keyboard device 10, and the threshold value Bj of area B (or the threshold value Ai of area A) is specified. An area may be defined as an area to be fine-tuned (tuned).

DESCRIPTION OF SYMBOLS 1 Operation part 2 Control circuit part 3 Touch sensor 4 Input detection circuit 5 Memory | storage part 6 Detection information processing part 10 Keyboard apparatus (input device)
DESCRIPTION OF SYMBOLS 11 Input operation surface 12 Case part 11a Section 11b Character symbol 20 PC (electronic device)
51 Area division information 52 Input determination information 61 Input determination information setting unit 62 Input determination unit A area (second area)
Area B (first area)
Ai Area A threshold Bj Area B threshold

Claims (4)

In an input device comprising a flat input operation surface provided with a plurality of character symbols and a plurality of touch sensors for detecting a change in electric capacity of the input operation surface,
A storage unit that stores input determination information in units of areas obtained by dividing the input operation surface into a plurality of regions;
An area to which the touch sensor that has detected the change in the capacitance belongs is determined, input determination information corresponding to the area is acquired from the storage unit, and the input operation of the character symbol is performed using the acquired input determination information. An input determination unit for determining presence or absence,
The area is divided according to the size of the contact area between a part of the input operator's body and the input operation surface in the input operation ,
The input device according to claim 1, wherein the detection sensitivity of the first area having a small contact area is set higher than the detection sensitivity of the second area having a contact area wider than the first area . The first area is an area where the input operation of the character symbol is performed using the side of the thumb of the hand of the input operator and the little finger.
The second area is an area for performing an input operation of the character symbol using a portion other than the side portion of the thumb of the hand of the input operator and the little finger.
The input device according to claim 1. In an input device comprising a flat input operation surface provided with a plurality of character symbols and a plurality of touch sensors for detecting a change in electric capacity of the input operation surface,
A storage unit that stores input determination information in units of areas obtained by dividing the input operation surface into a plurality of regions;
An area to which the touch sensor that has detected the change in the capacitance belongs is determined, input determination information corresponding to the area is acquired from the storage unit, and the input operation of the character symbol is performed using the acquired input determination information. An input determination unit for determining presence or absence,
The area is divided according to the probability that a part of the input operator's body in the input standby stage and the input operation surface come into contact unintentionally ,
The detection sensitivity of the first area where the probability of unintentional contact is high is set lower than the detection sensitivity of the second area where the probability of unintentional contact is lower than the first area. An input device characterized by that. The first area is an area that is substantially immediately below the position of the little finger of the input operator's hand in the input standby stage;
The second area is an area other than the first area.
The input device according to claim 3.

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