JP6017995B2 - Portable information processing apparatus, input method thereof, and computer-executable program - Google Patents

Description

  The present invention relates to a portable information processing apparatus, an input method thereof, and a computer executable program.

  In recent years, portable information devices such as tablet PCs, smartphones, PDAs (Personal Digital Assistance), and electronic book browsing terminals have become widespread. Such a portable information device includes a display and a key input unit such as a touch pad operated by touching with a keyboard or a fingertip as a user interface, and executes various applications to browse information and perform various types of operations. Processing is possible.

  FIG. 15 is a diagram for explaining text input on the tablet PC. As shown in FIG. 15, in the tablet PC 200, when inputting text, a software keyboard 201 displayed on a display is usually used. In the case of the software keyboard 201, there is a problem that display information is difficult to see because the keyboard 201 hides a wide range of the screen. In the case of the tablet PC 200, it is difficult to input from the software keyboard 201 with both hands while standing. On the other hand, in the case of a smartphone, the software keyboard is too small and input is inconvenient, and input using both hands is difficult.

Japanese Patent Laid-Open No. 7-200098 Japanese Patent Laid-Open No. 10-293640 JP 2004-13381 A

  The present invention has been made in view of the above, and an object of the present invention is to provide a portable information processing apparatus capable of easily performing rear-surface input with both hands, an input method thereof, and a computer-executable program. To do.

  In order to solve the above-described problems and achieve the object, the present invention provides portable information having a slate shape, which includes a display disposed on the front side and a first touchpad disposed on the back side. A processing device for detecting a position where a plurality of left and right fingers are in contact with the first touch pad, and setting a position of each of the plurality of fingers as a home position; Key discriminating means for discriminating key input based on the relative displacement of the plurality of fingers from the home position and the pressing force thereof.

  Further, according to a preferred aspect of the present invention, the key input determination means presses the corresponding key when the amount of finger movement from the home position exceeds a threshold and the movement direction is within a predetermined angle range. Selection means for selecting, and input confirmation means for confirming the key input of the selected key when a pressing force equal to or higher than the threshold of the finger is detected when a key is selected by the selection means. Is desirable.

  According to a preferred aspect of the present invention, a second touch pad disposed on the display, and display control means for displaying a key that is not assigned by the first touch pad on the display, It is desirable to provide.

  Further, according to a preferred aspect of the present invention, it is desirable that the display control means performs a key input guidance display by the first touchpad on the display.

  Further, according to a preferred aspect of the present invention, the plurality of left and right fingers are left and right forefinger, middle finger, ring finger, and little finger, and the home position setting means sets the left index finger to “F” and the left hand "D" for middle finger, "S" for left ring finger, "A" for left finger pinkie, "J" for right index finger, "K" for right middle finger, "L" for right finger ring, "L" for right finger It is desirable to assign the key “;” as the home position.

  In addition, according to a preferred aspect of the present invention, there is provided first learning means for learning a moving direction of each finger when key input is performed on the first touch pad and correcting the predetermined angle range. Is desirable.

  Further, according to a preferred aspect of the present invention, it is desirable to include second learning means for learning a finger pressing force against the first touch pad and correcting the finger threshold.

  According to a preferred aspect of the present invention, it is desirable that the portable information input device is a tablet PC.

  In order to solve the above-described problems and achieve the object, the present invention provides portable information having a slate shape, which includes a display disposed on the front side and a first touchpad disposed on the back side. An input method of a processing apparatus, comprising: a home position setting step of detecting a position where a plurality of left and right fingers are in contact with the first touch pad, and setting a position of each of the plurality of fingers as a home position; And a key determination step of determining a key input based on a relative displacement of each of the plurality of fingers from the home position and a pressing force thereof.

  In order to solve the above-described problems and achieve the object, the present invention provides portable information having a slate shape, which includes a display disposed on the front side and a first touchpad disposed on the back side. A home position setting for detecting a position where a plurality of left and right fingers are in contact with the first touch pad, and setting a position of each of the plurality of fingers as a home position. And a key discriminating step for discriminating key input on the basis of the relative displacement of each of the plurality of fingers from the home position and the pressing force thereof.

  According to the present invention, there is an effect that it is possible to provide a portable information processing apparatus that can easily perform rear-surface input with both hands, an input method thereof, and a computer-executable program.

FIG. 1 is a front view of a tablet PC. FIG. 2 is a rear view of the tablet PC 1. FIG. 3 is a schematic AA cross-sectional view of FIG. FIG. 4 is an explanatory diagram of the use of the tablet PC. FIG. 5 is a schematic diagram showing a hardware configuration of the tablet PC. FIG. 6 is a schematic functional configuration diagram relating to the back side input of the tablet PC. FIG. 7 is a schematic diagram for explaining a method of operating the back side input of the tablet PC. FIG. 8 is a conceptual diagram for explaining a relative arrangement position (virtual key arrangement) of keys corresponding to the index finger of the left hand. FIG. 9 is a diagram showing an example of guidance for back side input displayed on the LCD. FIG. 10 is a view for explaining the procedure of the back side input of the tablet PC. FIG. 11 is a diagram illustrating a display example of the LCD. FIG. 12 is a schematic functional configuration diagram relating to upper and lower back inputs according to a modification. FIG. 13 is a diagram showing a modification example of the key arrangement of the index finger of the left hand shown in FIG. FIG. 14 is a diagram for explaining an example of the pressing force of the user's finger. FIG. 15 is a diagram for explaining the background art.

  Hereinafter, a portable information processing apparatus according to the present embodiment, an input method thereof, and an embodiment of a computer system to which a computer-executable program is applied will be described. Although the components of the present invention are generally illustrated in the drawings herein, it can be readily understood that they may be arranged and designed in a wide variety of configurations with various configurations. Accordingly, the following more detailed description of the apparatus, method and program embodiments of the present invention is not intended to limit the scope of the invention as set forth in the appended claims, but merely to implement selected embodiments of the invention. It is intended as an example only, and is merely illustrative of selected embodiments of an apparatus, system and method consistent with the present invention as set forth in the claims herein. Those skilled in the art will appreciate that the present invention may be practiced without one or more of the specific details or with other methods, components, or materials.

(Embodiment)
With reference to FIGS. 1-4, the outline external appearance structure of tablet PC10 provided with the back surface input function which concerns on this Embodiment is demonstrated. 1 is a front view of the tablet PC 10, FIG. 2 is a rear view of the tablet PC 10, FIG. 3 is a schematic AA sectional view of FIG. 1, and FIG.

  The tablet PC 10 is a slate-shaped portable information processing apparatus in which a display is arranged on the front surface and a touch pad is arranged on the back surface, and back surface input is possible. The tablet PC 10 has a size that can be held with both hands.

  As shown in FIGS. 1 to 3, the tablet PC 10 has an LCD 13 disposed on the front surface 10 a side, and a second touch pad 12 disposed on the LCD 13. Various information is displayed on the LCD 13. Further, the first touch pad 15 is arranged on the back surface 10b side, and the back surface input is possible.

  In the tablet PC 10, a circuit board 14, an LCD 13, a second touch pad 12, and a first touch pad 15 are accommodated in a casing 11 that is a substantially rectangular parallelepiped. The housing 11 can be made of, for example, a synthetic resin. The first touch pad 15 and the second touch pad 12 are arranged on substantially the same plane as the frame of the housing 11.

  The second touch pad 12 is a multi-touch pad that can detect a plurality of fingers at the same time. For example, the second touch pad 12 includes a capacitive touch sensor and can detect a touch position (X, Y). ing. The first touch pad 15 is a multi-touch pad that can detect a plurality of fingers at the same time. For example, the first touch pad 15 includes a touch coordinate detection unit 15a configured by a capacitive touch sensor and a distortion sensor. The pressure detection unit 15b is configured to detect the touch position (X, Y) and the touch pressure (P). In addition, since a well-known method can be used for the method of detecting the touch position (X, Y) and the touch pressure (P), detailed description thereof is omitted. It is desirable that the first touch pad 15 and the second touch pad 12 have the same size.

  As shown in the explanatory diagram of FIG. 4, the back surface 10b of the tablet PC 10 is supported by the index finger, middle finger, ring finger, and little finger of the left and right hands from both sides, and the first touch is made using these eight fingers. The back side input is performed from the pad 15. In addition, the front surface 10a is supported by two fingers of the left and right thumbs, and front input is performed from the second touch pad 12 using the two fingers. That is, input is performed using all ten fingers.

  As will be described in detail later, the tablet PC 10 detects a position where the index finger, middle finger, ring finger, and little finger of the left and right hands touch the first touch pad 15, and assigns a specific key to each finger. And determining the key input based on the relative displacement and pressing force of each finger from the home position, thereby facilitating the rear input using both hands.

  FIG. 5 is a schematic diagram showing a hardware configuration of the tablet PC 10. As shown in the figure, the PC 10 includes a CPU 101, ROM 102, memory 103, HDD (hard disk) 104, LCD 13, graphics adapter 105, input unit 20, USB port 106, communication device 107, power supply circuit 108, and so on. Each part is connected directly or indirectly via a bus.

  The CPU 101 controls the entire PC 1 by the OS 111 stored in the HDD 104 connected via the bus, and manages functions based on various programs stored in the HDD 104. The ROM 102 stores a BIOS (Basic Input / Output System: basic input / output system) 102a, data, and the like.

  The memory 103 is composed of a cache memory and a RAM, and is a writable memory used as a work area for writing processing data of the execution program as a read area for the execution program of the CPU 101.

  An HDD (hard disk) 104 includes, for example, an OS 111 for controlling the entire slate PC 1 such as Windows (registered trademark) XP, VISTA, 7 or the like, and various drivers 112 (for example, a touch pad) for operating hardware of peripheral devices. Driver 112a, display driver 112b, etc.) 112, the first touchpad 15 is used for plane input application for performing rear surface input, and display processing of the display screen of the LCD 13 according to the input instruction of the input unit 20 and others A function of storing another application program 113 or the like for executing the process.

  The graphics adapter 105 converts display information into a video signal under the control of the CPU 101 and outputs the converted video signal to the LCD 13. The LCD 13 has a function of displaying various information according to the control of the CPU 101. The communication device 107 is for transmitting and receiving data via a network.

  The power supply circuit 108 includes an AC adapter, an intelligent battery, a charger for charging the intelligent battery, a DC / DC converter, and the like, and supplies power to each device under the control of the CPU 101.

  The input unit 20 is a user interface for a user to perform an input operation. The user selects a screen object such as various menus, icons, buttons, and a keyboard displayed on the screen of the LCD 13 and performs an input operation. This is for performing text input operations and screen operations such as scrolling and swiping.

  The input unit 20 includes a second tablet 12 disposed on the front surface 10a side of the tablet PC 10 and a first tablet 15 disposed on the back surface 10b side. The second tablet 12 detects a touch position (X, Y) such as a finger and outputs it to the CPU 101. The second tablet 12 detects the finger touch position (X, Y) and its touch pressure (P) and outputs them to the CPU 101.

  Next, with reference to FIGS. 6 to 10, a detection method and an operation method of the back surface input by the tablet PC 10 will be described. FIG. 6 is a schematic functional configuration diagram relating to the back side input of the tablet PC 10. FIG. 7 is a schematic diagram for explaining a method of operating the back side input of the tablet PC 10. FIG. 8 is a conceptual diagram for explaining a relative arrangement position (virtual key arrangement) of keys corresponding to the index finger of the left hand. FIG. 9 is a diagram illustrating an example of back-side input guidance displayed on the LCD 13. FIG. 10 is a view for explaining the procedure of the back side input of the tablet PC 10.

  In FIG. 6, the touch pad driver 112a receives the touch coordinates (X, Y) detected by the first touch pad 15 and the touch pressure (P). When the touch pad driver 112a receives eight touch coordinates (X, Y) and the touch pressure (P) from the touch pad driver 112a, the eight touch coordinates (X, Y) are changed to the left index finger, middle finger, Application that determines whether the ring finger, little finger, right index finger, middle finger, ring finger, little finger is supported, and the touch coordinates (X, Y) and the touch pressure (P) for each of these fingers It outputs to 113. The touch pad driver 112 a receives the touch coordinates (X, Y) detected by the second touch pad 12, and outputs the touch coordinates (X, Y) to the back input application 113.

  The back input application 113 functions as a finger-key arrangement storage unit 121, a home position setting unit 122, a key input determination unit 123, a display control unit 124, and the like.

  The finger-key arrangement storage unit 121 assigns a plurality of keys to each finger (left index finger, middle finger, ring finger, little finger, right index finger, middle finger, ring finger, little finger), and the relative arrangement of the keys assigned to each finger The position (virtual key arrangement) is stored. The key arrangement is set based on the QWERTY keyboard. In the present invention, the key layout is not limited to the QWERTY keyboard, and other key layouts may be used.

  As shown in FIG. 7, “F”, “R”, “4”, “V”, “G”, “T”, “5”, and “B” are assigned to the index finger of the left hand, and the middle finger of the left hand is assigned. , “D”, “E”, “3”, “C”, “S”, “W”, “2”, “X” to the left ring finger, and “A” to the left finger little finger , “Q”, “1”, “Z” are assigned.

  Also, “J”, “U”, “7”, “M”, “H”, “Y”, “6”, [N] are assigned to the index finger of the right hand, and “K”, “N” are assigned to the middle finger of the right hand. “I”, “8”, “,” are assigned, “L”, “O”, “9”, “.” Are assigned to the ring finger of the right hand, “;”, “P”, “0” and “/” are assigned.

  In these assignments, “F” for the left index finger, “D” for the left middle finger, “S” for the left ring finger, “A” for the left little finger, “A” for the right index finger “J”, “K” for the middle finger of the right hand, “L” for the ring finger of the right hand, and “;” for the little finger of the right hand are assigned as home positions.

  Next, of the arrangement of keys corresponding to each finger, the left index finger will be described as a representative. In the case of the index finger of the left hand, a virtual key arrangement as shown in FIG. 6 is obtained. As shown in the figure, the home position is set to “F”, the movement direction θ is within the first predetermined angle range with respect to “F”, and the movement distance L is threshold L1 ≦ L <threshold L2. The key of “R” is assigned to the range. For “F”, a key “4” is assigned to a range where the moving direction θ is within the first predetermined angle range and the moving distance L is L ≧ threshold value L2. Further, a key “T” is assigned to “F” in a range in which the moving direction θ is within the second predetermined angle range and the moving distance L is threshold L1 ≦ L <threshold L2. For “F”, a key “5” is assigned to a range where the moving direction θ is within the second predetermined angle range and the moving distance L is L ≧ threshold value L2. For “F”, a key “G” is assigned to a range where the moving direction θ is within the third predetermined angle range and the moving distance L is threshold L1 ≦ L <threshold L2. For “F”, a key “B” is assigned to a range where the moving direction θ is within the fourth predetermined angle range and the moving distance L is threshold L1 ≦ L <threshold L2. For “F”, a key “V” is assigned to a range in which the moving direction θ is within the fifth predetermined angle range and the moving distance L is threshold L1 ≦ L <threshold L2. For example, the threshold value L1 may be twice the standard deviation σ of the finger coordinate value, and the threshold value L2 may be four times the standard deviation σ of the finger coordinate value.

  In the figure, for example, the user can select “T” by moving the index finger of the left hand from the home position by a distance L1 in the direction of the second predetermined angle range.

  The home position setting unit 122 sets the touch coordinates (X, Y) of the left index finger, middle finger, ring finger, little finger, right index finger, middle finger, ring finger, little finger as the home position coordinates of each finger, and sets the left index finger. “F”, “D” for middle finger of left hand, “S” for ring finger of left hand, “A” for pinky finger of left hand, “J” for index finger of right hand, “K” for middle finger of right hand, “L” for ring finger of right hand ”,“; ”Is set as the home position key on the little finger of the right hand.

  The key input determining unit 123 determines key input based on the relative displacement and the pressing force of the left index finger, middle finger, ring finger, little finger, right index finger, middle finger, ring finger, and little finger from the home position. Specifically, the key input determination unit 123 refers to the key arrangement stored in the finger-key arrangement storage unit 113 and selects a corresponding key based on the movement amount and movement direction of the finger from the home position. To do. More specifically, the key corresponding to the case where the movement amount of the finger from the home position exceeds the threshold and the movement direction is within a predetermined angle range is selected. Note that the key input determination unit 123 determines that the key at the home position is being selected when there is a finger at the home position. Then, when a pressing pressure equal to or higher than the threshold value of the finger selecting the key is detected, the input of the selected key is confirmed.

  The display control unit 124 displays keys that are not assigned to the first touchpad 15 on the LCD 13 via the display driver 112b. For example, as shown in FIG. 9, special keys such as “Shift”, “Space”, “BS”, and “Enter” are displayed translucently. The user operates these keys with the thumbs of both hands. In addition, the display control unit 124 performs guidance display of key input by the first touch pad 15 on the LCD 13. For example, as shown in FIG. 9, the left selected index finger, middle finger, ring finger, little finger, right index finger, middle finger, ring finger, and the selected key are displayed translucently. In the example shown in the figure, the index finger of the left hand is “F”, the middle finger of the left hand is “D”, the ring finger of the left hand is “S”, the little finger of the left hand is “A”, the index finger of the right hand is “U”, and the middle finger of the right hand Indicates that “K” is selected, the ring finger on the right hand is “L”, and the little finger on the right hand is “;”.

  With reference to the flowchart of FIG. 10, an outline of a procedure for performing the back side input with the slate PC 10 will be described. In FIG. 7, when the user touches the first touchpad 15 with the index finger, the middle finger, the ring finger, and the little finger of the left and right hands (step S <b> 1), the home position setting unit 122 displays the first touchpad 15. The coordinates of each upper finger are set to the home position (step S2). As described above, the home position setting unit 122 determines that the key for the home position is being selected when the finger is at the home position.

  Next, the key input determination unit 123 refers to the key arrangement stored in the finger-key arrangement storage unit 121, the movement amount from the home position is equal to or greater than the threshold value, and the movement direction is within a predetermined angle range. It is determined whether or not there is a finger movement (step S3). When there is a finger movement in which the movement amount from the home position is equal to or greater than the threshold and the movement direction is within the set angle range (“Yes” in step S3), the key input determination unit 123 sets the corresponding key. Select (step S4). On the other hand, when the amount of movement from the home position is equal to or greater than the threshold value and there is no movement of the finger whose movement direction is within the set angle range (“No” in step S3), the process proceeds to step S5.

  In step S5, the key input determination unit 123 determines whether or not a pressing pressure equal to or higher than the threshold is applied from the finger selecting the key (step S5), and the pressing pressure equal to or higher than the threshold is applied from the finger selecting the key. If not, the process returns to step S3. On the other hand, when a pressing pressure equal to or higher than the threshold is applied from the finger selecting the key (“Yes” in step S5), the key input determining unit 123 determines the input of the key being selected (step S6). ), The process returns to step S3.

  For example, in FIG. 7, when inputting the characters “LOOK”, assuming that the finger is at the home position of the first touch pad 15 (steps S 1 and S 2 in FIG. 10), (1) Press to confirm the input of “L” (“Yes” in step S5 in FIG. 10, step S6). (2) Move the ring finger on the right hand to select “O” (“Yes” in step S3 in FIG. 10). ”, Step S4) By pressing twice, the input of“ O ”and“ O ”is confirmed (“ Yes ”in step S5 in FIG. 10, step S6), and the middle finger of the right hand in the home position is further pressed. Then, the input of “K” is confirmed (step S6 in FIG. 10).

  The display control unit 124 may display peripheral keys when the finger is on the boundary area of each key on the first touch pad 15. FIG. 11 is a diagram illustrating a display example of the LCD 13. The figure shows a display example when the index finger of the right hand is near the boundary between “J”, “Y”, and “U”. For example, the surrounding keys may be displayed when the distance from the home position is about 1.5σ to 2.5σ and the angle direction overlaps about 1/4 of the range assigned to each character.

  As described above, according to the present embodiment, in the rear input application 113, the home position setting unit 122 detects the position where the left and right fingers are in contact with the first touch pad 15, The positions of the plurality of fingers are set as home positions, and the key input determination unit 122 determines the key input based on the relative displacement from the home positions of the plurality of fingers and the pressing force thereof. Therefore, it is possible to easily perform the back input with both hands.

  Further, according to the present embodiment, the key input determination unit 122 selects a corresponding key when the movement amount of the finger from the home position exceeds the threshold and the movement direction is within a predetermined angle range. In the case where a key is selected, when a pressing pressure equal to or greater than the threshold value of the finger is detected, the key input of the selected key is confirmed, so the user selects the key and confirms the key input. It can be done easily.

  Further, according to the present embodiment, the display control unit 124 of the rear input application 113 performs the key input guidance display using the first touchpad 15 on the LCD 13, so that the user views the guidance display. However, it is possible to easily perform back side input. In other words, the user can remarkably improve the input speed by practicing the back side input while watching the guidance display.

(Modification)
Next, a modified example will be described with reference to FIGS. FIG. 12 is a schematic functional configuration diagram relating to upper and lower back inputs according to a modification. In the modification, the back surface input application 113 illustrated in FIG. 12 includes a learning unit 125. The learning unit 125 learns the movement direction of the finger when the key input is performed on the first touch pad 15 (manages history), and stores the key arrangement stored in the finger-key arrangement storage unit 121. The predetermined angle range may be corrected. That is, the key layout is corrected by learning the user's habit.

  For example, when there is a tendency to input a key other than the home position at a position deviating from the default angle, the predetermined angle range may be corrected. In addition, an input with a finger other than a standard finger may be allowed. FIG. 13 is a diagram showing a modification example of the key arrangement of the index finger of the left hand shown in FIG. In the example shown in FIG. 13, when “4” and “5” are input, the finger movement direction biased to the right side within the second predetermined range angle and the third predetermined range angle shown in FIG. In this case, as shown in FIG. 13, “4” and “5” are arranged slightly shifted to the right. FIG. 13 shows an arrangement example in which “3” not assigned to the left index finger is assigned to the left index finger. For example, the position “3” may be initially separated from the other keys, and may be disposed closer to the other keys each time the user repeats the input operation “3”.

  Further, the learning unit 125 may learn the finger pressing force on the first touch pad 15 (manage the pressing pressure history) and correct the finger pressing pressure threshold. FIG. 14 is a diagram for explaining an example of the pressing force of the user's finger. The threshold value may be corrected for each finger and each key. For example, the threshold value may be set from the average and distribution of normal force. For example, as for the threshold value, the input may be determined by a force of an average value + 3σ (standard deviation). If the user tends to press with a force larger than the threshold, the threshold may be increased (FIG. 14A). When the input is always performed with a force that is almost the threshold value, it is often repeated that the same key is pressed with a force equal to or less than the threshold value and then pressed again. In this case, the threshold value corresponding to the determination of this key may be lowered (FIG. 14B). Further, when the user repeatedly cancels the input of the same key, the threshold value of the key may be increased.

  According to the modification, the learning unit 125 learns the moving direction of the finger when the key input is performed on the first touch pad 15, and the key arrangement stored in the finger-key arrangement storage unit 121 is learned. Since the predetermined angle range is corrected, a key arrangement suitable for the user can be achieved.

  In addition, the learning unit 125 learns the finger pressing force with respect to the first touch pad 15 and corrects the threshold of the finger pressing force, so that it is possible to perform the back input with the finger force suitable for the user. It becomes possible.

  In the above-described embodiment, the first touch pad 15 is configured by the touch coordinate detection unit 15a and the pressure detection unit 15b. However, other configurations may be used, for example, a mechanical switch mechanism or the like. The configuration used may be used.

  In the above embodiment, the tablet PC has been described as an example, but the present invention is not limited to this, and can be applied to a slate type information processing apparatus such as a smartphone or a PDA.

  As described above, the portable information processing apparatus, the input method thereof, and the computer-executable program according to the present invention can be used for various apparatuses including a touch panel.

10 Tablet PC
11 Housing 12 Second touchpad 13 LCD
14 circuit board 15 first touch pad 20 input unit 101 CPU
102 ROM
103 Memory 104 HDD (Hard Disk)
105 Graphics adapter 106 Disk drive 108 Power supply circuit
112a Touchpad driver 113 Rear input application 121 Finger-key layout storage unit
122 Home position setting unit 123 Key input determination unit 124 Display control unit 125 Learning unit

Claims (8)

A portable information processing device comprising a display arranged on the front side and a first touchpad arranged on the back side,
Detecting a position where a plurality of left and right fingers are in contact with the first touch pad arranged on the back side, assigning a specific key to each of the plurality of fingers, and assigning the position of each finger, respectively Home position setting means for setting each home position;
A storage unit that stores a plurality of unique keys for each of the plurality of fingers, and stores a virtual key array that defines a moving direction and a moving amount of the keys assigned to the fingers from the home position;
Selecting means for selecting a corresponding key based on the movement amount and movement direction of the finger from the home position with reference to the virtual key arrangement;
When a key is selected by the selection means, an input confirmation means for confirming a key input of the selected key when a pressing pressure equal to or higher than a threshold value of the finger is detected;
A portable information processing apparatus comprising: A second touchpad disposed on the display;
Display control means for displaying on the display keys not assigned by the first touchpad;
The portable information processing apparatus according to claim 1, further comprising: The portable information processing apparatus according to claim 2 , wherein the display control unit performs a key input guidance display using the first touchpad on the display. The left and right fingers are left and right index fingers, middle finger, ring finger, and little finger,
The home position setting means is “F” for the left index finger, “D” for the middle finger of the left hand, “S” for the ring finger of the left hand, “A” for the little finger of the left hand, “J” for the index finger of the right hand, and the middle finger of the right hand 4. The portable type according to claim 1, wherein a key “K”, “L” for the right finger, and “;” for the little finger of the right hand are assigned as the home positions. Information processing device. Said first learn the pressing pressure of the finger on the touch pad, mobile according to any one of claims 1 to 4, characterized in that with a to that learning means modifying the threshold of the finger Type information processing device. The portable information processing apparatus, portable information processing apparatus according to any one of claims 1 to 5, characterized in that the tablet PC. An input method of a portable information processing apparatus comprising a display arranged on the front side and a first touchpad arranged on the back side,
Detecting a position where a plurality of left and right fingers are in contact with the first touch pad arranged on the back side, assigning a specific key to each of the plurality of fingers, and assigning the position of each finger, respectively Home position setting process to set each home position,
A plurality of unique keys are assigned to each of the plurality of fingers, and a virtual key arrangement defining the movement direction and amount of movement of the key assigned to each finger from the home position is referred to. A selection step of selecting a corresponding key based on a movement amount and a movement direction;
When a key is selected in the selection step, an input confirmation step for confirming the key input of the selected key when a pressing pressure equal to or higher than the threshold value of the finger is detected;
A method for inputting information into a portable information processing apparatus. A program mounted on a portable information processing device including a display arranged on the front side and a first touchpad arranged on the back side,
Detecting a position where a plurality of left and right fingers are in contact with the first touch pad arranged on the back side, assigning a specific key to each of the plurality of fingers, and assigning the position of each finger, respectively Home position setting process to set each home position,
A plurality of unique keys are assigned to each of the plurality of fingers, and a virtual key arrangement defining the movement direction and amount of movement of the key assigned to each finger from the home position is referred to. A selection step of selecting a corresponding key based on a movement amount and a movement direction;
When a key is selected in the selection step, an input confirmation step for confirming the key input of the selected key when a pressing pressure equal to or higher than the threshold value of the finger is detected;
A computer-executable program characterized by causing a computer to execute.

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