JP5343386B2 - Touch panel input method, input key determination method, touch panel input key determination program, and program medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively suppress or prevent an error in an inputted key when inputting characters by a touch panel. <P>SOLUTION: Since predicted input rates e<SB>1</SB>, e<SB>2</SB>relating to keys k<SB>1</SB>, k<SB>2</SB>when a key previously inputted is k<SB>1</SB>are 0.9 and 0.3, respectively, as shown in Fig.3, an expected input rate e<SB>1</SB>P<SB>1</SB>relating to the key k<SB>1</SB>is 0.9 times a recognition probability P<SB>1</SB>in Fig.1 while an expected input rate e<SB>2</SB>P<SB>2</SB>relating to the key k<SB>2</SB>is 0.3 times a recognition probability P<SB>2</SB>in Fig.1. Therefore, a position where the expected input rates e<SB>1</SB>P<SB>1</SB>, e<SB>2</SB>P<SB>2</SB>relating to the keys k<SB>1</SB>, k<SB>2</SB>become equal is x<SB>ma</SB>closer to the side of x<SB>2c</SB>than x<SB>mo</SB>in Fig.1. For the keys k<SB>1</SB>, k<SB>2</SB>, the expected input rates e<SB>1</SB>P<SB>1</SB>, e<SB>2</SB>P<SB>2</SB>of both the keys are compared, and the boundary of the keys k<SB>1</SB>, k<SB>2</SB>is brought closer to the side of a center x<SB>2c</SB>in the key k<SB>2</SB>so that e<SB>1</SB>P<SB>2</SB>is equal to e<SB>2</SB>P<SB>2</SB>. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a touch panel input method for dynamically changing a key boundary, a touch panel input key determination method, a touch panel input key determination program, and a program medium.

The touch panel is an input device configured by pasting transparent film-like or planar coordinate input means such as a matrix switch on a screen of a display monitor such as an LCD (liquid crystal display). The operator can input the key while visually recognizing the key displayed on the screen of the display monitor through the transparent coordinate input means. The key is displayed on the screen by surrounding characters, symbols, icons, etc. with a frame. Hereinafter, these display objects are simply referred to as “characters”. The display monitor receives a video signal of characters from the computer and displays the characters on the screen. The coordinate input means sends the coordinates of the position touched by the operator's finger or a dedicated instrument (called a stylus) to the computer. In the following description, the input is performed by bringing the operator's finger into contact with the input plane (referred to as a panel surface) of the coordinate input means. In the operation of the touch panel, an operation in which a finger touches the panel surface is referred to as touch, and character input by the touch is referred to as touch input. The computer specifies the key k _int that the operator intends to input by touch input from the correspondence between the position coordinates sent from the coordinate input means in response to the touch input and the position coordinates of the character image displayed on the screen of the display monitor. To do. Since each key is associated with a specific character in the computer in advance, the key k _int is specified, whereby the character that the operator intends to input by touch input is specified. Thus, in the same way as inputting a character by pressing a key on the keyboard, the character is displayed on the computer by touching a key (sometimes referred to as a soft key) displayed on the screen of the touch panel with a finger. Can be entered.

  FIG. 4 is a perspective view showing a foldable portable terminal. The foldable portable terminal 10 includes a touch panel 4 and a liquid crystal display (LCD) 6. This figure shows an example of a device provided with a touch panel. The touch panel described below is applied to a portable device as shown in FIG. 4 and also to a fixed device such as a bank ATM. FIG. 5 is a block diagram showing a configuration of an electronic circuit unit in the foldable portable terminal 10 of FIG. The foldable portable terminal 10 includes a CPU 1, a memory 2, a touch panel control unit 3, a touch panel 4, an LCD control unit 5, and an LCD 6. The CPU 1, the memory 2, and the touch panel control unit 3 constitute the aforementioned computer. As described above, the touch panel 4 includes coordinate input means and a display monitor.

FIG. 6 is a diagram conceptually showing a coordinate input means composed of matrix switches. In the figure, ◯ and ● represent individual switches in each matrix switch. A circle indicates a switch that is pressed and turned ON, and a circle indicates a switch that is not pressed and is OFF. 6 (a) shows a state where no keys are not touched, the (b) shows the key k ₁ is touched, the coordinate state switch is ON the (3, C), also drawing ( c) is the key k ₁ is touched, indicating coordinates (4, a state where the switch is oN in E), respectively. In an actual matrix switch type touch panel, a large number of switches are arranged in a grid pattern. In FIG. 6, 16 rows are arranged in each row of AG, and 7 columns are arranged in each column of 1-16 in the vertical direction. A simplified version of each switch is shown. As shown in the figure, in the matrix switch type touch panel, the position pressed by the operator is detected according to which switch among a number of switches arranged in two dimensions in the vertical and horizontal directions is pressed.

In the matrix switch of FIG. 6, the area indicated by the key k ₁ is assigned to the key area indicated by the number “1”, and the area indicated by the key k ₂ is assigned to the key area indicated by the number “2”. In FIG. 6, xy orthogonal coordinates are hypothesized on the panel surface, and the center coordinates of the keys k ₁ and k _{2 in} the xy orthogonal coordinates are indicated by (x _1c , y _1c ) and (x _2c , y _2c ), respectively.

The position detection method using a touch panel detects physical contact between two conductive films by contact pressure (eg, matrix switch method in FIG. 6), and changes in capacitance between the two conductive films by contact pressure. There are various methods such as a detection method and an ultrasonic surface acoustic wave method that detects a change in vibration characteristics of the panel surface due to the finger touching the panel surface. In either method, the panel surface is divided into a large number of grid-like areas, and it is detected which area the finger touches, and the key that the operator intends to input based on the area where the finger touch is detected. The computer recognizes what k _int is. In the matrix switch method, since the individual switches are arranged in a grid at regular intervals, the coordinates of the position input by touch are discrete values. However, in the ultrasonic surface acoustic wave method, the detected coordinates take continuous values. As described above, the position detection method in the touch panel includes a method of detecting the coordinates of the position input by touch as a discrete value and a method of detecting the coordinates of the position as a continuous value.

An input device using a touch panel is disclosed in, for example, Patent Document 1 (Republished Patent WO2003 / 027826). The touch panel input device of Patent Document 1 is an input device based on the idea of changing the boundary for identification according to the touch position. The input device includes a display unit that displays a plurality of keys partitioned into a predetermined range. Further, an identification area for identifying a key that is a target of touch input is provided corresponding to the plurality of keys, and an identification area for a predetermined key is determined based on a position where the preceding first touch input is made. An area setting unit to be changed, and an identification unit for identifying a key that is a target of the second touch input based on the position where the second touch input following the first touch input is made and the changed identification area are provided. ing. Since the input device can change the identification area of a predetermined key based on the position where the preceding first touch input is made, it is possible to suppress or prevent erroneous input (Patent Document 1). Page (6), see lines 8-17). Here, the “position where the first touch input is made” means a touch position in the area of the key identified as having the first touch input. Examples of the “position where the first touch input is made” include a position near the right boundary of the key “F” where the first touch input was made (case 1 in FIG. 9 of cited document 1), or near the left boundary. (Cases 2 and 3 in FIG. 9 of the cited document 1).
Republished patent WO2003 / 027826

  The touch panel input device of Patent Document 1 is based on the idea of changing the boundary for identification according to the touch position, and includes an area setting unit and an identification unit for changing the boundary. The area setting unit varies the identification area of the predetermined key based on the position where the first touch input is made. The identifying unit identifies a key that is a target of the second touch input based on the position where the second touch input following the first touch input is made and the changed identification region. Therefore, in the touch panel input device of Patent Document 1, since the key boundary is changed only by considering the positions where the first and second touch inputs are made, the setting of the boundary is often not appropriate, and erroneous input is caused. It cannot be sufficiently effective in suppressing or preventing. As described above, the touch panel input device disclosed in Patent Document 1 has a problem to be solved regarding a technique for effectively suppressing or preventing an error of a key input by touch input.

  Therefore, the present invention has been made to solve such a problem in the technique described in Patent Document 1, and effectively suppresses or prevents an error in an input key when inputting characters using a touch panel. The purpose is to do.

  In order to solve the above-described problems, the touch panel input method according to the present invention employs a characteristic configuration described in (1) below. The touch panel input key determination method, the touch panel input key determination program, and the program medium according to the present invention also adopt the same characteristic configuration.

  (1) A touch panel input method that changes the boundary of keys to be input by the next touch input based on the key attribute input by the previous touch input.

  According to the touch panel input method, touch panel input key determination method, touch panel input key determination program, and program medium of the present invention, it is possible to effectively suppress or prevent errors in keys that are input.

  Hereinafter, preferred embodiments of a touch panel input method, a touch panel input key determination method, a touch panel input key determination program, and a program medium according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a diagram showing a key recognition probability curve for explaining the first embodiment of the present invention. In this figure, the horizontal axis represents the horizontal (x-axis) coordinates on the touch panel, and the vertical axis represents the keys k ₁ and k ₂ when the position of each x-axis coordinate on the touch panel is touched by the operator. _{Represents the} probability of being recognized as a key k _int intended to be input. In this figure, the probability distribution related to the x-axis in the touch panel is shown, but the probability distribution related to the vertical direction (y-axis) in the touch panel can also be expressed by a similar curve. In the following, the key recognition probability with respect to the x-axis will be described, but the description with respect to the x-axis can be applied as it is with respect to the y-axis.

The touch panel input method of each embodiment of the present invention described in detail below is a touch panel that employs a position detection method that detects discrete coordinates of touch-input coordinates (for example, the matrix switch type touch panel of FIG. 6). In addition, the present invention can also be applied to a touch panel such as an ultrasonic surface acoustic wave method that employs a position detection method that detects a touch-input coordinate with a continuous value. The touch panel described below as an embodiment by way of example is the touch panel 4 shown in FIG. 4, and the numbers “1”, “2”, “3”, “4”, “ 5 ”,“ 6 ”,“ 7 ”,“ 8 ”,“ 9 ”,“ * ”
, “0” and “#” are respectively displayed on the keys k ₁ , k ₂ , k ₃ , k ₄ , k ₅ , k ₆ , k ₇ , k ₈ , k ₉ , k ₁₀ , k ₁₁ and k _12. It is assumed to be respectively arranged (ellipsis k ₅ and k ₈ illustrated). In the description of this embodiment, the virtual touch panel similar to xy coordinates as shown in FIG. 6, the key _{k 1,} k 2, respectively the center coordinates of the region of ······ _{k 12} (x _1c , _y1c ), ( _x2c , _y2c ), ... ( _x12c , _y12c ). However, as described above, only the x coordinate will be described below. Therefore, in the description related to the coordinates of the keys k ₁ , k ₂ ,..., K ₁₂ , the center coordinates are x _1c , x _2c ,. ... _x12c .

Generally, the operator touches the touch panel with the intention of inputting keys k _i (i = 1, 2, 3,..., N. In this embodiment, n is the number of keys k 12). when, the probability to be recognized as there is an input from the key k _i the computer is believed to be represented by a normal distribution curve as shown in FIG. In FIG. 7, the horizontal axis x represents the coordinates of the touch position detected by the coordinate input means of the touch panel, and the vertical axis P represents the input key k _int intended by the operator when the touch position is the coordinate x. It represents the probability of being recognized by the computer as being k _i . The probability P is not necessarily a normal distribution, but is a distribution represented by some probability function.

In the touch panel input method of this embodiment, there is a touch on the touch panel, when the coordinates of the detected touch position in the coordinate input section of the touch panel is x, the input key k _int the operator has intended are key k _i And the probability P _i (x) recognized by the computer is represented by a normal distribution curve shown in FIG. In this case, the probability detected touch position in the coordinate input section of the touch panel if the center coordinates x _ics key k _i, the input key k _int the operator has intended are recognized by the computer when there key k _i P _i (x) is 1. Then, the probability that the key k _i is recognized as k _int gradually decreases toward 0 as the detected touch position shifts left and right (minus direction or plus direction) from the center coordinate x _ic .

FIG. 1 is a diagram for explaining a first embodiment of the present invention, where i in FIG. 7 is 1 and 2, and keys k ₁ and k ₂ are adjacent to each other as shown in FIG. it is a diagram showing the distribution of recognition probabilities for key k ₁ and k ₂ in when disposed. P ₁ (x) and P ₂ (x) in this figure are intended by the operator when there is one touch on the touch panel and the coordinate of the touch position detected by the coordinate input means of the touch panel is x. The probability that the computer recognizes that the input key k _int is the key k ₁ or k ₂ is shown.

In the example of FIG. 1, the key recognition probabilities P ₁ (x) and P ₂ (x) are different in that the coordinates of the center position are x _1c and x _2c , respectively, but both probability distribution curves have the same shape. . If there is a touch in the area indicated as the area of the key k _{1 and} the area of the key k ₂ in this figure, the computer recognizes that the key k ₁ or k ₂ is the input key k _int intended by the operator. Then, the numbers “1” and “2” are respectively input to the touch panel input method. Boundary key _{k 1} region and the key _{k 2} region, the coordinate of the center position regarding key _{k 1} and _{k 2} is in the midpoint _{x mo} of _{x 1c} and _{x 2c.}

In a first embodiment of a touch panel input method of the present invention which advances the description indicates the probability curve in Figure 1, the recognition probability P _i relating to key k _i is a center coordinate x _ics and the touch position x of key k _i And is obtained by a functional expression of Pi = P ((xi _c −x) ² ). In addition, for the sake of simplicity, the description is made in one dimension called the x axis. However, in an actual xy two-dimensional plane, the center coordinates (xi _c , y _{i c} ) and the touch position coordinates (x, y) of the key k _i Is represented by (xi _c −x) ² + (y _{i c} −y) ² , and the recognition probability Pi is Pi = P ((xi _c −x) ² + (y _{i c} −y) ² )). Calculate with a function expression.

The touch panel input method of the embodiment shown in FIG. 1, when there is one touch to the touch panel, recognition probability P _{i (i} for all of the keys k _i of 4, 2 ..... 12) is determined, and the key corresponding to the maximum recognition probability P _imax among the recognition probabilities Pi is determined as the key k _int intended by the operator.

Figure 2 is a diagram illustrating an expected input rate used in the second embodiment of the present invention, FIG. 3 is a diagram showing a prediction input rate table showing the predicted input rate e _i corresponding first touch input history . In the touch panel input method according to the first embodiment of the present invention described with reference to the probability curve in FIG. 1, the recognition probability P _i for the key k _i based on the distance between the center coordinate x _ic of the key k _i and the touch position x. the calculated, was determined key which becomes the largest recognition probability P _imax within the recognition probability P _i for all of the key as is the intention with key k _int operator, a second embodiment of the present invention in FIG. 2 In the embodiment, the boundary of the key to be input by the next touch input is changed based on the key attribute (key attribute) input by the previous touch input.

  In the second embodiment, a touch input history, which is a key history input by a previous touch input, is used as an input key attribute, and a predicted input rate ei of a key input by the next touch input is set to each key i. Predetermined every time, the product eiPi of the predicted input rate ei and the probability Pi is calculated as an expected input rate, the expected input rates eiPi between two adjacent keys are compared, and the expected input rate for both keys The position where eiPi is equal is defined as the boundary between the two keys.

Hereinafter, the second embodiment of the present invention will be described in more detail with reference to FIGS. In the second embodiment of the present invention, even if the key input by the previous touch input is a number, a character, an icon, or the same character, "a" , “B”, “c”, etc., “a”, “i”, “u”, hiragana characters, and even alphabets, “a”, “b”, “c” , ............ The predicted input rate e _i taking into account the attribute of the input key, which character is “y”, “z”, is obtained for each key k _i and obtained in the first embodiment of the present invention. the recognition probability P _i relating to key k _i is multiplied by the predictive input rate e _i, determine the expected input rate EPI, to be equal the expected input rate eP _i at the boundary of each key k _i, changing its boundaries.

In the second embodiment, the attribute of the input key i (i = 1, 2, 3,... N. In this embodiment, n is the number of keys k, 12) is the previous touch input. For each key i, a predicted input rate e _i corresponding to the history is created in advance as a predicted input rate dictionary. The predicted input rate dictionary is created for one or a plurality of continuous touch inputs. Although how many times the continuous touch input dictionary is created can be arbitrarily selected, in the present embodiment, it is limited to three times. In the present embodiment, the numbers 0 to 9 on the touch panel 4 shown in FIG. 4, * and # 12 character keys are input, and the number of keys is small, so the touch input history is for three consecutive touch inputs. Just try to create. However, if the touch panel can input many keys such as hiragana and alphabet, predictive input related to words consisting of many character keys such as a normal Japanese (English) dictionary or English dictionary A dictionary with a rate e may be provided.

The predicted input rate dictionary is expressed in a table format to facilitate searching. The table of the predicted input rate e _i is stored in advance in the memory 2 of FIG. The expected input as the expected probability of the touch input according to the history of the previous touch input by multiplying the recognition probability P _i created in the first embodiment by the predicted input rate e _i introduced in the second embodiment rate e _i seek P _i, to set the expected input rate e _i P _i for each key, compares the expected input rate e _i P _i key i mutually adjacent, the expected input rate of the adjacent key i each other e The boundary between adjacent keys is changed so that _i P _i becomes equal.

As described above, FIG. 3 is a diagram showing a predicted input rate table representing the predicted input rate e _i corresponding to the previous touch input history. The column of the touch input history, have been described enclosed with one key k _i or more continuous input key {}. {K _i} represents that key input immediately before the touch panel input method of the second embodiment is k _i. Since the touch panel to be input in the second embodiment is the touch panel 4 in the foldable portable terminal 10 of FIG. 4, the key k _i is any one of k ₁ , k ₂ ,... K ₁₂ . It is. The predicted input rate e _i (i = 1, 2, 3,... N) is obtained when the key {k _i } in the touch input history column is the previous touch input, k ₁ , k ₂ ,..., K _i ,... K _n (in this embodiment, the number of keys n is 12.) is the probability that a touch is predicted for each. Therefore, the expected input rate e _i P _i is the product of the recognition probability P _i and the predicted input rate e _i can be said to be the expected probability of a touch input in consideration of the history of the previous touch input.

The predicted input rate table in FIG. 3 will be described more specifically. {K _1} touch input history field, the computer in the touch panel input method of the second embodiment indicates that the entered key k _i in the previous keystroke. In the touch input history column, {k ₁ , k ₁ } represents that the key k ₁ has been input twice in succession, and {k ₁ , k ₂ } represents the key k ₁ followed by the key k _2. {K _a , k _b , k _c } indicates that the keys k _a , k _b , and k _c are sequentially input in this order.

Touch input predictive input rate history column is in line is _{{k 1} e 1, e} 2, e 3, ······ e n , respectively 0.9,0.3,0.1, ... ... 0.1. For example, the number “1”, “2”, “3” is displayed by touching after the key k _{1, that} is, the number “1” is input.
... The probability that the symbol “#” is input is 0.9, 0.3, 0.1,. The value of the predicted input rate e is determined based on statistical empirical rules. In the touch panel input method of the present embodiment, the characters input by the keys k ₁ , k ₂ ,... K ₁₂ are “1”, “2”,. * "," 0 "and"#". Assuming that this touch panel input method is for input of accounting data, and “1” is often followed by “1” in accounting data, when key k ₁ is the previous key input, the next key "1" on input
Since the key k ₁ is likely to be touched, e ₁ in {k _1} is higher than other predictive input rate.

FIG. 2 is a diagram illustrating an expected input rate regarding the keys k ₁ and k ₂ when the previously input key is k ₁ . As described above, the predicted input rates e ₁ and e _{2 for} the keys k ₁ and k ₂ when the previously input key is k ₁ are 0.9 and 0, respectively, as shown in FIG. because it is 3, the expected input rate _e 1 _{P 1} about the key _{k 1} whereas a 0.9 fold recognition probability _{P 1} in FIG. 1, expected input rate _e 2 _{P 2} about the key _{k 2} is in FIG. 1 it is 0.3 times the recognition probability _{P 2.} Therefore, the expected input rate _e 1 _{P 1} and _e 2 _{P 2} about key _{k 1} and _{k 2} are equal position is a _{x ma} that closer to the _{x 2c} side of the _{x mo} of FIG. In the second embodiment, with respect to the keys k ₁ and k ₂ , the expected input rates e ₁ P ₁ and e ₂ P ₂ of both keys are compared, and the key so that e ₁ P ₁ = e ₂ P ₂ is satisfied. gather the boundary between k ₁ and _{k 2} in the center _{x 2c} side of the key _{k 2.} Similarly, the expected input rates of other adjacent keys are compared, and a position where the expected input rates are equal is defined as a boundary between both keys.

As described above, the touch panel input method according to the second embodiment of the present invention described with reference to FIGS. 2 and 3 is the touch position detected in the xy orthogonal two-axis coordinate system virtually on the touch plane of the touch panel. The coordinates are (x, y), and the coordinates of the center position of the key i (i = 1, 2, 3,..., N, n is a positive integer of 2 or more) on the touch panel are (x _ic , y _ics), when a normal distribution function other probability functions P, and the probability the key i is intended key _{k int} operator and _{P i, P i = P (} (x ic -x) 2 + (y _ic -y) ² )) to obtain the probability P _i
A predicted input rate e _i to be input by the next touch input is determined in advance for the key i in accordance with the touch input history that is a key history input by the previous touch input, and the predicted input rate e _i and the Multiplies _e i _{P i} with probability _{P i} as the expected input rate,
Compares the expected input rate e _i P _i of the two adjacent keys mutually position the expected input rate e _i P _i for both keys is equal to the boundary of the both keys.

According to the second embodiment of the present invention having such a configuration, the key area expected by the next touch is enlarged based on the history of the input by the previous touch, so that the error of the input key is effectively prevented. Therefore, it is possible to increase the probability that the key k _int intended to be input by the operator's touch input is input.

By modifying the second embodiment of the present invention described above, the predicted input rate is gradually increased according to the elapsed time t from the previous touch input to the next touch input, for example, the predicted input rate e _i is increased. You may approach 1 gradually. If the elapsed time t increases, the probability that the next touch input will accurately touch the key k _int intended by the operator increases, so the predicted input rate e _i for each key is gradually set to 1 according to the elapsed time t. In many cases, it is possible to effectively suppress or prevent an input key error.

In the predicted input rate table of FIG. 3 representing the predicted input rate e _i corresponding to the previous touch input history, {k ₁ }, {k ₁ , k ₁ }, {k ₁ , k ₁ , ...}, {K ₁ , k ₂ }, {k _a , k _b , k _c } are exemplified as touch input histories. {K ₁ , k ₁ ,...} Represents that the key k ₁ continues many times. These illustrated touch input histories are composed of a predetermined code of keys related to one or a plurality of touch inputs and an input order of the codes. The code is a predetermined code for representing a character, such as ASCII or Shift JIS code. If the character assigned to the key k ₁ is the numeral “1”, the code of the key k ₁ is the ASCII code 0x31 (hexadecimal). The order of touch input also constitutes the touch input history. For example, the order of k ₁ and k ₂ is different from the order of k ₂ and k ₁ . When the previous touch input is k ₁ , in the above example, any of {k ₁ }, {k ₁ , k ₁ }, {k ₁ , k ₁ ,. Although it corresponds to the input history, the most covering corresponding history of the number of elements is adopted. This is because it can be said that the information of the touch input history having a large number of elements predicts the next touch input better.

  The second embodiment described above is modified so that the touch panel input method has a so-called learning function and uses the touch input statistical data to gradually improve the predicted input rate in the predicted input rate table of FIG. Can do.

  The configuration of the preferred embodiment of the present invention has been described above. However, it should be noted that such examples are merely illustrative of the invention and do not limit the invention in any way. Those skilled in the art will readily understand that various modifications and changes can be made according to a specific application without departing from the gist of the present invention. For example, the embodiment of the present invention can be expressed as the following configuration in addition to the configuration (1) in the means for solving the problems.

(2) The touch panel input method according to (1), wherein a change amount of the key boundary is reduced in accordance with an elapsed time from the previous touch input to the next touch input.
(3) The touch position coordinates detected in the xy orthogonal biaxial coordinate system imaginary on the touch plane of the touch panel is (x, y), and the key i (i = 1, 2, 3,... N on the touch panel). , N is a positive integer of 2 or more) (x _ic , y _ic ), P is a normal distribution function or other probability function, and the probability that the key i is the key k _int intended by the operator is when the ^{_{P i, P i = P (}} (x ic -x) 2 + (y ic -y) 2)) becomes operational calculated probabilities _{P i,} the intended key k of the operator based on said probability _{P i} Touch panel input method that determines _int .
(4) The touch panel input method according to (3), wherein a key corresponding to the maximum probability P _imax among the probabilities P _i related to a plurality of keys in the touch panel is determined as the key k _int intended by the operator.
(5) The touch position coordinates detected in the xy orthogonal biaxial coordinate system imaginary on the touch plane of the touch panel are (x, y), and the key i (i = 1, 2, 3,... N on the touch panel). , N is a positive integer of 2 or more) (x _ic , y _ic ), P is a normal distribution function or other probability function, and the probability that the key i is the key k _int intended by the operator is When _Pi is set, P _i = P ((x _ic −x) ² + (y _ic −y) ² )) is used to obtain the probability P _i ,
A predicted input rate e _i to be input by the next touch input is determined in advance for the key i in accordance with the touch input history that is a key history input by the previous touch input, and the predicted input rate e _i and the Multiplies _e i _{P i} with probability _{P i} as the expected input rate,
Two expected input rate of keys mutually compares the e _i P _i, a touch panel input method for a position where the expected input rate e _i P _i for both keys is equal to the boundary of the both keys adjacent.
(6) The touch panel input method according to (5), wherein the predicted input rate e _i is gradually increased according to an elapsed time from the previous touch input to the next touch input.
(7) The touch panel input method according to (6), wherein the predicted input rate e _i is gradually increased toward 1 according to an elapsed time from the previous touch input to the next touch input.
(8) The touch panel input method according to any one of (5) to (7), wherein the elements of the touch input history include a predetermined code of a key related to one or a plurality of touch inputs and an input order of the codes.
(9) The touch panel input method according to (5) to (8), wherein the predicted input rate e _i is recorded on a recording medium in a table format in advance corresponding to the touch input history.
(10) The touch panel input method according to (5) to (9), wherein the predicted input rate e is corrected based on a touch input result for each key.
(11) A touch panel input key determination method for changing a boundary of a key to be input by the next touch input based on an attribute of the key input by the previous touch input.
(12) The touch panel input key determination method according to (11), wherein an amount of change in the key boundary is reduced in accordance with an elapsed time from the previous touch input to the next touch input.
(13) The touch position coordinates detected in the xy orthogonal biaxial coordinate system imaginary on the touch plane of the touch panel are (x, y), and the key i on the touch panel (i = 1, 2, 3,... N , N is a positive integer of 2 or more) (x _ic , y _ic ), P is a normal distribution function or other probability function, and the probability that the key i is the key k _int intended by the operator is when the ^{_{P i, P i = P (}} (x ic -x) 2 + (y ic -y) 2)) becomes operational calculated probabilities _{P i,} the intended key k of the operator based on said probability _{P i} A touch panel input key determining method for determining _int .
(14) The touch panel input key determination method according to (13), wherein the key corresponding to the maximum probability P _imax among the probabilities P _i regarding the plurality of keys in the touch panel is determined as the key k _int intended by the operator.
(15) The touch position coordinates detected in the xy orthogonal two-axis coordinate system imaginary on the touch plane of the touch panel are (x, y), and the key i on the touch panel (i = 1, 2, 3,... N , N is a positive integer of 2 or more) (x _ic , y _ic ), P is a normal distribution function or other probability function, and the probability that the key i is the key k _int intended by the operator is When _Pi is set, P _i = P ((x _ic −x) ² + (y _ic −y) ² )) is used to obtain the probability P _i ,
A predicted input rate e _i to be input by the next touch input is determined in advance for the key i in accordance with the touch input history that is a key history input by the previous touch input, and the predicted input rate e _i and the Multiplies _e i _{P i} with probability _{P i} as the expected input rate,
It compares the expected input rate e _i P _i of the two adjacent keys mutually touch panel input key determination method of the position of the expected input rate e _i P _i for both keys is equal to the boundary of the both keys.
(16) The touch panel input key determination method according to (15), wherein the predicted input rate e _i is gradually increased according to an elapsed time from the previous touch input to the next touch input.
(17) The touch panel input key determination method according to (16), wherein the predicted input rate e _i is gradually increased toward 1 according to an elapsed time from the previous touch input to the next touch input.
(18) A touch panel input key determination program for implementing the touch panel input key determination method of (11) to (17) as a program executable by a computer.
(19) A program recording medium in which the touch panel input key determination program of (18) is recorded so as to be readable by a computer.

It is a figure which shows the key recognition probability curve for demonstrating the 1st Embodiment of this invention. It is a figure which shows the expected input rate used in the 2nd Embodiment of this invention. It is a diagram showing a predictive input rate table showing the predicted input rate e _i corresponding first touch input history. It is a perspective view which shows a foldable portable terminal. It is a block diagram which shows the structure of the electronic circuit part in the foldable portable terminal 10 of FIG. It is a figure which shows notionally the coordinate input means which consists of a matrix switch. The horizontal axis x represents the coordinate of the touch position detected by the coordinate input unit of the touch panel, the vertical axis P when the touch position is coordinate x, the input key k _int the operator has intended are key k _i It is a figure which shows the recognition probability curve showing the probability recognized with a computer.

Explanation of symbols

1 CPU
2 Memory 3 Touch Panel Control Unit 4 Touch Panel 5 LCD Control Unit 6 Liquid Crystal Display (LCD)
10 Keys on the foldable mobile terminals k _{1 to} k ₁₂ touch panel 4

Claims (17)

A touch panel input method for changing the boundary of keys to be input by the next touch input based on the key attribute input by the previous touch input,
The touch position coordinates detected in the xy orthogonal biaxial coordinate system imaginary on the touch plane of the touch panel are (x, y), and the keys i (i = 1, 2, 3,... N, n on the touch panel are 2 or more positive integer) coordinates _(x ics of the center _{of, y ics),} the probability of the _{P i} is intended key _{k int} the normal distribution function or other probability functions P, the key i operator Then, P _i = P ((x _ic −x) ² + (y _ic −y) ² )) is used to determine the probability P _i ,
A predicted input rate e _i to be input by the next touch input is determined in advance for the key i in accordance with the touch input history that is a key history input by the previous touch input, and the predicted input rate e _i and the Multiplies _e i _{P i} with probability _{P i} as the expected input rate,
Compares the expected input rate e _i P _i of the two adjacent keys mutually touch panel input method the position expected input rate e _i P _i for both keys are equal, characterized in that the boundary of the both keys.   The touch panel input method according to claim 1, wherein an amount of change in the boundary of the key is reduced according to an elapsed time from the previous touch input to the next touch input. The touch panel input method according to claim 1, wherein a key k _int intended by an operator is determined based on the probability P _i . 4. The touch panel input method according to claim 3, wherein a key corresponding to the maximum probability P _imax among the probabilities P _i related to the plurality of keys in the touch panel is determined as the key k _int intended by the operator. . The touch panel input method according to claim 1, wherein the predicted input rate e _i is gradually increased according to an elapsed time from a previous touch input to a next touch input. 6. The touch panel input method according to claim 5, wherein the predicted input rate e _i is gradually increased toward 1 in accordance with an elapsed time from a previous touch input to a next touch input. Wherein the elements of the touch input history, a touch panel input method according to claim 1 or 2, characterized in that it comprises an input order of a predetermined code and the predetermined code of one or more keys for a touch input. The touch panel input method according to claim 1, wherein the predicted input rate e _i is recorded in advance in a table format in a table format corresponding to the touch input history. The touch panel input method according to claim 1, wherein the predicted input rate e _i is corrected based on a result of touch input for each key. A touch panel input key determination method for changing a boundary of a key to be input by the next touch input based on an attribute of the key input by the previous touch input,
The touch position coordinates detected in the xy orthogonal biaxial coordinate system imaginary on the touch plane of the touch panel are (x, y), and the keys i (i = 1, 2, 3,... N, n on the touch panel are 2 or more positive integer) coordinates _(x ics of the center _{of, y ics),} the probability of the _{P i} is intended key _{k int} the normal distribution function or other probability functions P, the key i operator Then, P _i = P ((x _ic −x) ² + (y _ic −y) ² )) is used to determine the probability P _i ,
A predicted input rate e _i to be input by the next touch input is determined in advance for the key i in accordance with the touch input history that is a key history input by the previous touch input, and the predicted input rate e _i and the Multiplies _e i _{P i} with probability _{P i} as the expected input rate,
Compares the expected input rate e _i P _i of the two adjacent keys mutually touch panel input key determination method the position expected input rate e _i P _i for both keys are equal, characterized in that a boundary between the both keys .   The touch panel input key determination method according to claim 10, wherein an amount of change in the boundary of the key is reduced according to an elapsed time from the previous touch input to the next touch input. The touch panel input key determination method according to claim 10, wherein the key k _int intended by the operator is determined based on the probability P _i . The touch panel input key according to claim 12, wherein the key corresponding to the maximum probability P _imax among the probabilities P _i related to a plurality of keys in the touch panel is determined as the key k _int intended by the operator. Decision method. The touch panel input key determination method according to claim 10, wherein the predicted input rate e _i is gradually increased according to an elapsed time from the previous touch input to the next touch input. The touch panel input key determination method according to claim 14, wherein the predicted input rate e _i is gradually increased toward 1 in accordance with an elapsed time from a previous touch input to a next touch input. A touch panel input key determination program, wherein the touch panel input key determination method according to any one of claims 10 to 15 is implemented as a program executable by a computer.   A program recording medium, wherein the touch panel input key determination program according to claim 16 is recorded so as to be readable by a computer.

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