JP2014041497A - Communication terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suitably suppress, in a communication terminal device capable of receiving input of handwritten characters by using a touch panel, a detection level of the touch panel according to a usage state of the device during handwriting input.SOLUTION: A communication terminal device 10 includes: a display unit 180; an input unit 170 that is arranged on the surface of the display unit 180 and has a touch panel unit 171; an image control unit 102 that generates a predetermined image including a handwriting input screen and displays the image on the display unit; a usage state determination unit 101 that determines a usage state of the device when the handwriting input screen is displayed on the display unit; and a detection sensitivity control unit 103 that decreases detection sensitivity of the touch panel unit 171 when the usage state determination 101 detects a specific usage state.

Description

  The present invention relates to a communication terminal device including a display unit having a touch panel, and more particularly to a communication terminal device that allows a user to input handwritten characters and the like using a touch panel.

  Portable communication terminal devices such as tablet computers, smart phones, and portable information terminals are provided with input means such as a touch panel on the surface of a display unit that includes a liquid crystal panel or the like. In such an electronic device, an input software key is displayed using a liquid crystal panel, and a user operates the touch panel on the liquid crystal panel with a finger or a stylus pen (input pen) while visually recognizing the software key. To input desired information.

  By the way, in a device having such a touch panel, it is necessary to correctly detect which position (coordinates) on the display screen is touched when the user touches the display screen with a finger or the like. For this reason, various ideas have been made to correctly detect the user's input operation.

  For example, in the following Patent Document 1 (Japanese Patent Laid-Open No. 2011-170727), when a finger or the like is released, the detection sensitivity around the selected location is adjusted to prevent the selected location from being shifted due to erroneous contact. An input device configured as described above is disclosed.

  The input device includes a detection unit that detects an input instruction within a sensitivity range as detection data, an operation determination unit that determines stop of the input instruction based on the detection data detected by the detection unit, and an operation determination unit that inputs Among the detection data detected by the detection unit when it is determined to stop the instruction, a sensitivity control unit that sets a range for reducing the sensitivity for outputting the coordinate data, and the detection data and the sensitivity control unit detected by the detection unit And a position determining unit that outputs coordinate data based on the range in which the sensitivity is reduced.

  Patent Document 2 (Japanese Unexamined Patent Application Publication No. 2012-103995) below discloses a touch panel device in which erroneous detection is suppressed by appropriately setting detection sensitivity.

  In the touch panel device, the detection determination unit includes the capacitance value detected by the capacitance value detection unit in the detection range determined in consideration of the sensitivity correction value in the predetermined sensitivity reference value. It is configured to detect operation input to the touch panel, and the timer / correction value setting unit detects the touch panel by setting the sensitivity correction value based on the transition of the capacitance value detected by the capacitance value detection unit. It is configured to control the sensitivity.

JP 2011-170727 A JP 2012-103995 A

In general, in a communication terminal device capable of inputting handwritten characters using a touch panel, a user touches (touches) a desired character, figure, symbol, or the like with a finger in an input frame on the touch panel. ) Is input. The touch panel unit is provided with a detection unit that detects a figure inputted by sequentially detecting coordinates of a place touched by a user with a finger. Usually, the detection unit detects the coordinates of the place where the capacitance has changed. For this reason, the determination threshold level of the capacitance is set in the detection unit, and it is determined whether the user's finger is touching or not. The same applies when handwritten input is performed with an input pen attached to the apparatus instead of a finger.

  Further, in the communication terminal device as described above, a “return key” for displaying the menu screen, returning from the displayed screen to the original screen, and a selection key (button) for raising and lowering the volume are provided. It has been. Although these keys may be provided as mechanical keys (hard keys), they are displayed in a partial area of the screen and configured to execute functions assigned to the keys when the user touches them with a finger or pen. Often done. In general, such a key is called a soft key.

  By the way, when such a communication terminal device is used and the user selects handwriting input, when touching and writing a desired character or figure in the input frame with a finger, the root of the palm other than the finger There are cases where the part touches the part where the soft key is displayed. Since the capacitance determination threshold level set in the detection unit of the touch panel is fixed, the detection unit may erroneously determine that the soft key has been selected.

  In the devices disclosed in Patent Document 1 and Patent Document 2 described above, it is disclosed to improve detection accuracy by changing the detection sensitivity of the touch panel, but consideration is given to erroneous determination in handwriting input. Absent.

  An object of the present invention is to solve the above-described problems, and in a communication terminal device capable of inputting handwritten characters and the like using a touch panel, according to the use state of the device during handwriting input. Therefore, it is an object of the present invention to provide a communication terminal device that suitably controls the detection level of the touch panel.

  In order to solve the above problems, a communication terminal device according to the present invention generates a predetermined image including a display unit, an input unit having a touch panel unit disposed on a surface of the display unit, and a handwriting input screen. When the image control unit to be displayed on the display unit, the use state determination unit that determines the use state of the own device when the handwriting input screen is displayed, and the use state determination unit determine a specific use state, And a detection sensitivity control unit that lowers the detection sensitivity of the touch panel unit.

  In one aspect of the communication terminal device of the present invention, the handwriting input screen has at least a handwriting input area and a soft key display area, and the detection sensitivity control unit determines a specific usage state by the usage state determination unit. In this case, the detection sensitivity of the touch panel unit other than the handwriting input area is lowered.

  In one aspect of the communication terminal device of the present invention, the handwriting input screen has at least a handwriting input area and a soft key display area, and the detection sensitivity control unit determines a specific usage state by the usage state determination unit. In this case, the detection sensitivity of the touch panel portion in the soft key display area is lowered.

  Further, in one aspect of the communication terminal device of the present invention, the usage state determination unit determines the specific usage state based on vibration detection of the communication terminal device.

  Moreover, the aspect of the communication terminal device of the present invention is characterized in that the usage state determination unit determines the specific usage state based on operation detection by a secondary battery of the communication terminal device.

  The present invention exhibits the excellent effects described below. That is, the communication terminal device of the present invention generates a predetermined image including a display unit, an input unit having a touch panel unit disposed on the surface of the display unit, and a handwriting input screen, and causes the display unit to display the image. The detection sensitivity of the touch panel unit when the control unit, the use state determination unit that determines the use state of the device itself when the handwriting input screen is displayed, and the use state determination unit determine a specific use state And a detection sensitivity control unit for lowering.

  Therefore, when the device itself is placed on a desk or the like during handwriting input, the detection sensitivity of the touch panel unit is lowered than usual, thereby suppressing erroneous detection caused by touching the touch panel unit with parts other than fingers. become able to.

  Moreover, according to the aspect of the communication terminal device of the present invention, the handwriting input screen has at least a handwriting input area and a soft key display area, and the detection sensitivity control unit is configured so that the use state determination unit has a specific use state. Is determined, the detection sensitivity of the touch panel unit other than the handwriting input area is lowered.

  Therefore, when the device is placed on a desk or the like during handwriting input, the detection sensitivity of the touch panel unit other than the handwriting input area is lowered from the normal level so that parts other than the fingers are placed on the touch panel unit other than the handwriting input area. False detection due to touching can be suppressed.

  Moreover, according to the aspect of the communication terminal device of the present invention, the handwriting input screen has at least a handwriting input area and a soft key display area, and the detection sensitivity control unit is configured so that the use state determination unit has a specific use state. Is determined, the detection sensitivity of the touch panel portion in the soft key display area is lowered.

  Therefore, when the device is placed on a desk or the like for handwriting input, the detection sensitivity of the touch panel part in the soft key display area is lowered from the normal level, so that parts other than the fingers are placed on the touch panel part in the soft key display area. False detection due to touching can be suppressed.

  Moreover, according to one aspect of the communication terminal device of the present invention, the use state determination unit determines the specific use state based on vibration detection of the communication terminal device.

  Therefore, it is possible to determine that the device is placed on a desk or the like during handwriting input, and by lowering the detection sensitivity of the touch panel portion of the soft key display area from the normal level, the touch panel of the soft key display area can be used for parts other than the fingers. It is possible to suppress erroneous detection due to touching the part.

  Moreover, according to the aspect of the communication terminal device of the present invention, the use state determination unit determines the specific use state based on the operation detection by the secondary battery of the communication terminal device.

Therefore, it is possible to determine that the device is placed on a desk or the like during handwriting input, and by lowering the detection sensitivity of the touch panel portion of the soft key display area from the normal level, the touch panel of the soft key display area can be used for parts other than the fingers. It is possible to suppress erroneous detection due to touching the part.

It is a block diagram which shows the structure of the communication terminal device which concerns on the Example of this invention. It is a flowchart which shows the process sequence of the communication terminal device at the time of handwritten input. It is a figure which shows an example of the display image displayed at the time of handwritten input. It is a figure which shows the example of the input screen at the time of handwriting input. It is a flowchart which shows the other process sequence of the communication terminal device at the time of handwritten input.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment shown below exemplifies a communication terminal device for embodying the technical idea of the present invention, and is not intended to specify the present invention as this communication terminal device. The present invention can be equally applied to communication terminal devices of other embodiments included in the scope of claims.

  First, with reference to FIG. 1, a tablet computer as an example of the communication terminal device of the present embodiment will be described. FIG. 1 is an internal block diagram of the tablet computer of this embodiment. The tablet computer may be a communication terminal device such as a portable information terminal device or a mobile phone.

  The tablet computer 10 of this embodiment includes a control unit 100, an external power input unit 110, a secondary battery 120, a wireless communication unit 130, a camera 140, a vibration sensor 150, an angle sensor 160, an input unit 170, a display unit 180, and a speaker. 190 is comprised.

  The control unit 100 is a microprocessor that includes a CPU, a RAM, and a ROM (not shown). The CPU 100 executes a program stored in the ROM so that each function of the tablet computer 10 is performed. Control and control. The control unit 100 functions as a handwriting input determination unit 101, an image control unit 102, a detection sensitivity control unit 103, and a storage unit 104. The function and operation of each unit of the control unit 100 will be described in detail later.

  The external power input unit 110 includes a power cord connector, a voltage control circuit, a charge control circuit (not shown), and the like. The power cord connecting connector is formed on one of the side surfaces of the housing of the tablet computer 10 to which a power cord plug is connected. When the power cord plug is connected to the power cord connector, DC power that has been stepped down to a predetermined voltage from a commercial power source is supplied to the tablet computer 10 via a transformer or the like. The voltage control circuit adjusts the voltage of the supplied power to a constant value and continuously supplies power to each part of the tablet computer 10.

  Further, the charging control circuit detects whether or not the power cord plug is connected to the power cord connecting connector, and when the power cord plug is connected and the secondary battery 120 described later is not fully charged. The battery 120 is charged by supplying power of a predetermined voltage or a predetermined current to the secondary battery 120. In addition, when the secondary battery 120 is fully charged, the charging of the secondary battery 120 is terminated. The charging control circuit supplies power charged in the secondary battery 120 to each part of the tablet computer 10 when the power cord plug is not connected to the power cord connector. Ensure that power is supplied.

  The secondary battery 120 is accommodated in the form of a battery pack in the housing of the tablet computer 10. The secondary battery 120 is, for example, a lithium ion secondary battery.

  The wireless communication unit 130 is for the tablet computer 10 to communicate with an access point using wireless. When the tablet computer 10 communicates with an access point, the wireless communication unit 130 performs control including establishment and disconnection of a communication session. If there is data to be transmitted, the data is encoded and then packetized, and transmitted to the access point using radio at a predetermined frequency. Also, when data is received from the access point, the packet is assembled after being assembled, data to be received is acquired, and stored in the storage unit 103.

  The camera 140 is a built-in camera provided on the same side of the housing of the tablet computer 10 as the surface on which the display unit 180 described later is provided. When the user operates the display unit 180, the user's state is changed. You can shoot.

  The vibration sensor 150 is configured by an acceleration sensor, and measures acceleration applied to the tablet computer 10. In particular, a change in gravitational acceleration applied to the tablet computer 10 is detected, the orientation of the tablet computer 10 is determined, and the orientation of the image displayed on the display unit 180 by the image control unit 101 is determined accordingly. Make it portrait or landscape.

  The angle sensor 160 is constituted by an angular acceleration sensor, and detects a change in the rotation angle of the tablet computer 10 per unit time. The detected change in the rotation angle is used for camera shake detection of the camera 140 and the like.

  The input unit 170 includes a touch panel 171 and a mechanical switch 172. The touch panel 171 is provided on the surface of the display unit 180. The touch panel 171 outputs position information in which contact is detected when the user makes a contact with a specific part of the touch panel 171 with a finger or a stylus while visually recognizing the software key displayed on the display unit 180. The hard key 172 is a mechanical switch such as a push button switch provided on the housing of the tablet computer 10 and is used to perform operations such as turning on / off the power source and turning on / off the display unit 180.

  The display unit 180 is provided at a position that occupies most of one surface of the tablet computer 10, and includes a liquid crystal panel unit, an organic EL panel unit, or the like. The display unit 180 displays various images generated by the image control unit 102, such as handwritten character input screens and soft keys described later.

  The speaker 190 is built in the tablet computer 10 and outputs audio amplified by an amplifier (not shown) when audio data stored in the storage unit 103 is reproduced.

The image control unit 102 of the control unit 100 generates and controls various screens to be displayed on the display unit 180. For example, the image control unit 102 generates a lock screen or an initial screen and displays it on the display unit 180. The lock screen is a screen that is displayed when the input unit 170 of the tablet computer 10 has not been operated for a certain period of time, and no screen other than the lock screen is displayed unless a predetermined operation is performed on the input unit 170. By doing so, malfunction of the tablet computer 10 is prevented. The image control unit 102 generates an initial screen and displays it on the display unit 180 when a predetermined operation is performed on the lock screen and the lock is released. The image control unit 102 further generates a handwritten character input screen, various soft keys, a pop-up display image, and the like and causes the display unit 180 to display the screen.

  The use state determination unit 101 of the control unit 100 determines whether or not the own apparatus is in a specific use state when the handwriting input screen is displayed. The specific usage state refers to a state where the user is using the tablet computer 10 placed on a desk or the like. The method of determination by the use state determination unit 101 can be performed based on the result of vibration detection of the device itself, for example. When vibration is detected, it can be estimated that the user is using it by hand, and when vibration is not detected, it can be estimated that the tablet computer 10 is placed on a desk or the like. Moreover, it can also be performed based on the operation detection by the secondary battery of the own apparatus. When the operation is performed by the secondary battery, it can be estimated that the user is using the handheld battery. When the operation is not performed by the secondary battery, that is, when the operation is performed by the external power supply, the tablet computer 10 is placed on a desk or the like. Can be estimated.

  When the handwriting input determination unit 101 determines a handwriting input instruction, the detection sensitivity control unit 103 of the control unit 100 changes the detection sensitivity of the touch panel unit 171 to be lower than the normal sensitivity. Details of the sensitivity change will be described later.

  The storage unit 104 of the control unit 100 stores data transmitted and received between the wireless communication unit 130 and the access point. The storage unit 104 stores data necessary for generating a handwriting input screen displayed by the image control unit 102 and other various display screens when handwriting input is designated. Furthermore, the memory | storage part 104 memorize | stores whether this tablet type computer 10 is set to handwriting input mode.

  Next, with reference to FIG. 2, a procedure for controlling the detection sensitivity of the touch panel unit in the tablet computer 10 at the time of handwriting input will be described. FIG. 2 is a flowchart showing a processing procedure of the tablet computer 10 during display of the handwriting input screen.

  First, when the user activates the tablet computer 10 and performs desired processing, when inputting desired information, the user operates the menu screen or the displayed input designation key to input using the touch panel. An instruction is given (step S101). Here, a case where handwritten input is designated will be described in detail. The designation of handwriting input is performed, for example, by designating the handwriting input mode.

  When handwriting input is instructed to be selected, the image control unit 102 displays an input screen as shown in FIG. Referring to FIG. 3, a handwriting input area 18a is displayed on the display screen 18 (step S103). In the soft key display area 18b at the bottom of the screen, soft keys such as a home key 181, a menu key 182, a return key 183, a volume key (up) 184, and a volume key (down) 185 are displayed.

  When the handwriting input screen is displayed, it is determined whether or not the usage state of the device is in a specific state. Here, it is determined whether the own apparatus is in a specific state based on the presence or absence of vibration detection using the output of the vibration sensor 150 (step S102). When vibration is detected, it can be estimated that the user is using it by hand, and when vibration is not detected, it can be estimated that the tablet computer 10 is placed on a desk or the like.

  If vibration is detected (YES in step S102), the process proceeds to step S107 to determine whether or not the input is completed. If the input is not completed, the determination process in step S107 is repeated. If the input is complete (YES in step S107), the control unit 100 executes a process according to the input information (step S106).

  On the other hand, when vibration is not detected (NO in step S102), the detection sensitivity control unit 103 of the control unit 100 lowers the detection sensitivity of the touch panel unit 171 from the normal detection sensitivity (step S103). For example, when the detection threshold value of the touch panel unit 171 is set to a normal threshold level and a threshold level that lowers the detection sensitivity, and a handwriting input is instructed, the latter threshold level is used to indicate a finger or stylus. An operation with a pen (input pen) or the like is detected. The detected operation coordinates are sequentially stored in the storage unit 104 as input information.

  When inputting handwritten characters, in order to stabilize the movement of the fingers, portions other than the input fingers, for example, the base of the palm, often touch areas other than the handwriting input area 18a. Such a situation frequently occurs when handwriting input is performed by placing the device on a desk or the like, not in a handheld state. If it is erroneously detected that these areas have been touched, the original handwriting input process will be hindered. In particular, if an operation on the soft key 181 displayed in the soft key display area 18b is erroneously detected, the tablet computer 10 shifts to a process corresponding to the operation of the soft key, and the handwriting input process is performed. It will cause trouble.

  Therefore, the detection sensitivity control unit 103 is preferably configured to lower at least the detection sensitivity of the soft key display area 18b than the normal detection sensitivity, but is configured to decrease the detection sensitivity of portions other than the handwriting input area 18a. May be. In addition, since the degree of contact with the touch panel unit 171 differs between the operation of the finger on the handwriting input area 18a and the contact other than the finger on the other region, the detection sensitivity of the entire screen (the entire touch panel unit) is lowered, and handwriting is performed. Only the contact of the finger with the input area 18a may be detected.

  FIG. 4 shows an example in which the handwritten character “A” is input to the handwriting input area 18a on the handwriting input screen. Information of detected coordinates indicating the handwritten character “A” is stored in the storage unit 104, and the input character determination unit determines the input character from the information of detected coordinates stored in the storage unit 104. The character discrimination method is a method performed in a general handwriting input device, and detailed description thereof is omitted here.

  When the handwriting input is thus performed, the control unit 100 proceeds to the process of step S104, determines whether or not the input is completed, and repeats the determination process of step S104 if the input is not completed.

  If the input is completed (YES in step S104), the image control unit 102 ends the display of the input screen (see FIGS. 3 and 4) for the handwritten input, and the detection sensitivity control unit 103 of the control unit 100 is the touch panel unit 171. The control unit 100 executes processing according to the input information (step S106).

  The determination process of the use state determination unit 101 is not limited to the process illustrated in the flowchart of FIG. Instead of detecting the presence or absence of vibration, determination based on operation detection by a secondary battery is possible. FIG. 5 is a flowchart showing another determination process procedure of the use state determination unit 101 during display of the handwriting input screen.

  The processing in step 201 in FIG. 5 is the same as the processing in step 101 in the flowchart in FIG.

When the handwriting input screen is displayed, it is determined whether or not the usage state of the device is in a specific state. Here, it is determined whether or not the own device is in a specific state based on whether or not the own device is operated by the secondary battery 120 (step S202). When the operation by the secondary battery is detected, it can be estimated that the user is using it by hand, and when the operation by the secondary battery is not detected, it is estimated that the tablet computer 10 is placed on a desk or the like. it can.

  If an operation by the secondary battery is detected (YES in step S202), the process proceeds to step S207 to determine whether or not the input is completed. If the input is not completed, the determination process in step S207 is repeated. If the input is complete (YES in step S207), the control unit 100 executes a process according to the input information (step S206).

  On the other hand, when the operation by the secondary battery is not detected (NO in step S202), the detection sensitivity control unit 103 of the control unit 100 lowers the detection sensitivity of the touch panel unit 171 from the normal detection sensitivity (step S203). For example, when the detection threshold of the touch panel unit 171 is set to a normal threshold level and a threshold level that lowers the detection sensitivity, and the operation by the secondary battery is not detected, the latter threshold level is used. And an operation with a stylus pen (input pen) are detected. The detected operation coordinates are sequentially stored in the storage unit 104 as input information.

  The detection sensitivity control unit 103 is preferably configured so that at least the detection sensitivity of the soft key display area 18b is lower than the normal detection sensitivity. However, the detection sensitivity control unit 103 may be configured to decrease the detection sensitivity of portions other than the handwriting input area 18a. Good. In addition, since the degree of contact with the touch panel unit 171 differs between the operation of the finger on the handwriting input area 18a and the contact other than the finger on the other region, the detection sensitivity of the entire screen (the entire touch panel unit) is lowered, and handwriting is performed. Only the contact of the finger with the input area 18a may be detected.

  When the handwriting input is thus performed, the control unit 100 proceeds to the process of step S204, determines whether or not the input is completed, and repeats the determination process of step S204 if the input is not completed.

  If the input is completed (YES in step S204), the image control unit 102 ends the display of the input screen (see FIGS. 3 and 4) for the handwritten input, and the detection sensitivity control unit 103 of the control unit 100 is the touch panel unit 171. The control unit 100 executes a process corresponding to the input information (step S206).

  As described above in detail, according to the communication terminal device according to the present invention, the touch panel detection level is suitably controlled according to the use state of the device during handwriting input, and the device itself is placed on a desk or the like. In this case, by lowering the detection sensitivity of the touch panel unit than usual, it is possible to suppress erroneous detection due to a part other than the fingers touching the touch panel unit.

10 Communication terminal device (tablet computer)
DESCRIPTION OF SYMBOLS 100 Control part 101 Usage state determination part 102 Image control part 103 Detection sensitivity control part 104 Storage part 110 External power supply input part 120 Secondary battery 130 Wireless communication part 140 Camera 150 Vibration sensor 160 Angle sensor 170 Input part 171 Touch panel part 172 Hard key 180 Display unit 18 Display screen 18a Handwritten input area 18b Soft key display area 190 Speaker

Claims (5)

A display unit;
An input unit having a touch panel unit disposed on the surface of the display unit;
An image control unit that generates a predetermined image including a handwriting input screen and displays the image on the display unit;
A use state determination unit that determines the use state of the device when the handwriting input screen is displayed;
A communication terminal device comprising: a detection sensitivity control unit that lowers the detection sensitivity of the touch panel unit when the use state determination unit determines a specific use state.   The handwriting input screen has at least a handwriting input area and a soft key display area, and the detection sensitivity control unit, when the usage state determination unit determines a specific usage state, the touch panel unit other than the handwriting input area The communication terminal apparatus according to claim 1, wherein the detection sensitivity of the communication terminal is lowered.   The handwriting input screen has at least a handwriting input area and a soft key display area, and the detection sensitivity control unit, when the use state determination unit determines a specific use state, the touch panel unit of the soft key display area The communication terminal apparatus according to claim 1, wherein the detection sensitivity of the communication terminal is lowered.   The communication terminal device according to any one of claims 1 to 3, wherein the usage state determination unit determines the specific usage state based on vibration detection of the communication terminal device.   The communication according to any one of claims 1 to 3, wherein the use state determination unit determines the specific use state based on an operation detection by a secondary battery of the communication terminal device. Terminal device.

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