JP4056420B2 - Display control device and portable communication terminal equipped with display control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display control device that controls a moving direction of display on a display unit via a pointing device such as a touch pad, and more particularly to a display control device suitable for mounting on a mobile communication terminal.
[0002]
[Prior art]
In general, a mobile phone is provided with a display unit such as a liquid crystal display capable of displaying contents of received mails, taken pictures, games, and the like.
These mobile phones are provided with pointing devices such as a cross key, a jog dial, and a touch pad for scrolling display contents and moving the display position of a cursor or pointer.
[0003]
FIG. 6A shows a specific example of an external view of a mobile phone in which a cross key is mounted as a pointer device. In FIG. 6A, 101 is an antenna, 601 is a call key for answering an incoming call, 602 is a power key for turning on / off the power, and 603 is a confirmation key for confirming an inputted character or the like. 604 is a cross key used for moving the cursor or scrolling the display, 605 is a numeric keypad used for inputting a telephone number or characters, and 106 is a display unit.
[0004]
As a prior art for controlling the moving direction of the display on the display unit via the pointing device, the scroll direction of the display content depends on whether the locus drawn by the position coordinates input on the touchpad surface is clockwise or counterclockwise. Patent Document 1 discloses a technique for switching between the two.
Thereby, even when the panel surface is small, the user can easily switch the scroll direction of the display content by switching the rotation direction on the panel surface.
[0005]
Also, a technology that partitions the touchpad surface into fixed areas, defines the position of each partition with two-dimensional absolute coordinates, and identifies the moving direction and speed of the pointer based on the input absolute coordinates of the section is patented It is disclosed in Document 2.
Thus, the user can easily move the pointer by designating a section on the touch pad surface.
[0006]
[Patent Document 1]
JP-A-9-230993
[0007]
[Patent Document 2]
JP2001-282450
[0008]
[Problems to be solved by the invention]
However, when using the technique disclosed in Patent Document 1, in order to scroll the display content in the intended direction, the user must be constantly aware of the rotation direction of the input trajectory. There is a problem that the direction of rotation is wrong.
[0009]
In addition, when using the technique disclosed in Patent Document 2, the user needs to perform an input operation while constantly confirming a section for input, and when mounted on a compact device such as a mobile phone. Is not practical because the area of each compartment becomes too small.
Accordingly, in view of the above problems, the present invention provides a display control device that can be mounted on a mobile communication terminal that can easily control display movement in a display unit in a small space regardless of an input position. With the goal.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is a display control device including a touch pad that receives an external input through contact with a pad surface, and a position detection unit that sequentially detects an input position on the pad surface; A vector calculating means for calculating a vector having each input position sequentially detected after the first input position is detected as the end point and the input position detected immediately before as the start point; and each input position The vector V in _n And the vector V n at the input position detected immediately before ₁ The direction change determination means for determining whether or not the angle θ (0 ≦ θ ≦ 180 °) formed by is greater than a predetermined angle α, and the display contents of the display unit are determined according to the movement of the input positions. And scroll control means for redefining a direction opposite to the scroll direction determined immediately before as a new scroll direction only when θ is larger than α.
[0011]
The present invention is also a portable communication terminal comprising a display control device including a touch pad that receives input from the outside via a pad surface, and a display unit, wherein the display control device has an input position on the pad surface. Position detection means that sequentially detects the first input position, and for each input position sequentially detected after the first input position is detected, the direction of the vector is calculated with the input position as the end point and the input position detected immediately before as the start point. Vector calculating means for performing the above operation, and the vector V at each of the input positions. _n And the vector V n at the input position detected immediately before ₁ The display content of the display unit is determined in accordance with the direction change determination means for determining whether or not the angle θ (0 ≦ θ ≦ 180 °) formed by is greater than the predetermined angle α and the movement of each input position. Scroll means for scrolling in the direction, and scroll control means for redefining a direction opposite to the scroll direction determined immediately before as a new scroll direction only when θ is larger than α.
[0012]
As a result, as long as the input position is moved in the moving direction within a predetermined range on the touch pad surface, the display content on the display unit can be continuously scrolled in one direction, and the input position can be moved as necessary. Since the scroll direction can be reversed by controlling the direction, the display moving direction on the display unit can be easily controlled in a small space regardless of the input position on the touch pad surface.
[0013]
For example, if the predetermined angle α is 90 °, the user keeps scrolling in one direction on the touchpad surface at a rate larger than 50% of the possible angle range of the angle θ without reversing the scroll direction. By setting the predetermined angle α to be larger than 90 °, it is possible to continue scrolling in one direction at a larger rate.
[0014]
In addition, the present invention is a display control device that includes a touch pad that receives an input from the outside through contact with the pad surface, and displays a pointer on the display unit in accordance with the input. Detecting means for detecting, vector calculating means for calculating a vector having the input position as an end point and the first input position as a start point for each input position detected sequentially after the input position is first detected; Each time an input position is sequentially detected, pointer movement control means for moving the pointer displayed on the display unit according to a vector calculated for the input position can be provided.
[0015]
In addition, the present invention is a display control device that includes a touch pad that receives an external input via the pad surface, and that displays a pointer on the display unit according to the input, and detects a position of the external input Means for calculating a vector having the input position as an end point and the first input position as a start point for each input position sequentially detected after the input position is first detected; The pointer movement control means for moving the pointer displayed on the display unit according to the vector calculated for the input position each time is sequentially detected.
[0016]
Thereby, it is possible to easily control the moving direction of the pointer in the display unit with a small space regardless of the input position.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
<Configuration>
FIG. 6B illustrates a specific example of an external view of a mobile phone 100 in which the display control device in this embodiment is mounted. In FIG. 6B, the same components as those of the mobile phone in FIG. In FIG. 6B, reference numeral 103 denotes a touch pad, and reference numeral 606 denotes a switching key for selecting and instructing activation of the scroll control program and the pointer movement control program.
[0018]
FIG. 1 is a functional block diagram showing a functional configuration of the mobile phone 100. The cellular phone 100 includes an antenna 101, a wireless unit 102, a touch pad 103, a touch pad control unit 104, a control unit 105, a display unit 106, an input unit 107, a memory 108, a microphone 109, and a speaker 110. The display control apparatus according to the present embodiment includes a touch pad 103, a touch pad control unit 104, and a control unit 105. The same number is attached | subjected about the component same as the component of FIG. 6 (B).
[0019]
The wireless unit 102 transmits and receives communication data for communication as a communication radio wave, modulates the communication data output from the control unit 105 into a communication radio wave, transmits the communication data via the antenna 101, and transmits the communication data via the antenna. The received communication radio wave is demodulated and output to the control unit 105.
Here, “communication data” refers to control data used for communication control such as a telephone number, voice data for a call, electronic mail, character information, image data, an incoming signal, and the like.
[0020]
The touch pad 103 is composed of a capacitance sensor that detects a change in capacitance, and when an input from a user is received through contact with a touch pad surface such as a fingertip or a touch pad pen, Is detected from the change in capacitance at the input position, and the input position is output to the touch pad control unit 104 as a position coordinate signal indicating the position coordinates on the touch pad surface.
[0021]
The detection of the input position may be performed every time the input position is moved, or may be performed at regular intervals.
Here, the touch pad 103 can be configured by, for example, providing matrix electrodes on the front surface and the back surface of the electrostatic film, and forming an electric field by applying a pulse from one end of the electrostatic film. As a result, the capacitance of the contact portion decreases when the fingertip or pen touches the electrostatic film through the pad surface, so the change in capacitance is converted into a change in current value to detect the position of the contact portion. can do.
[0022]
The touch pad control unit 104 A / D converts the position coordinate signal input from the touch pad 103 and outputs the position coordinate data to the control unit 105 as position coordinate data.
The control unit 105 includes, for example, a microprocessor, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and controls the entire mobile phone 100 by executing a control program stored in the ROM. Do.
[0023]
Further, the control unit 105 performs a scroll control process and a pointer movement control process by executing a scroll control program and a pointer movement control program stored in the ROM, respectively. Hereinafter, both processes will be described.
(1) Scroll control processing
The control unit 105 records the position coordinate data sequentially input from the touch pad control unit 104 in the memory 108, determines the initial input direction based on the position coordinate data, and displays the display unit according to the determined initial input direction. If the scroll direction of the display of 106 is specified, the display is scrolled in the specified scroll direction, and then the movement locus of the input position on the touchpad surface is not reversed, the specified scroll direction according to the movement of the input position When the movement of the display is continued and inversion is detected, the display is moved in the opposite scroll direction, and it is detected by the touch pad 103 that there is no contact on the touch pad surface. When notified from the unit 104, it is determined that the input is completed, and the process is terminated.
[0024]
Here, the “initial input direction” refers to a vector having a first input position on the touchpad surface of the touchpad 103 as a start point and an input position immediately thereafter as an end point in the orthogonal X-axis direction and Y-axis direction. This refers to the direction indicated by the Y component of the vector when it is decomposed into vectors.
FIG. 2B to FIG. 2E show examples of the movement locus of the input position input on the touch pad surface by the user. For example, in FIG. 2B, the initial input direction in the movement trajectory starting from the start point with a solid line is determined as “downward”, and the initial input direction in the movement trajectory starting from the start point with a dotted line is It is determined as “upward”.
[0025]
When the Y component vector is 0, it may be determined as “upward”, may be determined as “downward”, or may be determined according to the position indicated by the position coordinates of the start point. It is good also as switching.
For example, the determination of the initial input direction (hereinafter referred to as “zero determination”) when the Y component vector is 0 may be switched depending on whether or not the Y coordinate indicated by the position coordinate of the starting point exceeds a predetermined value.
[0026]
As a result, when the starting point is at a position as shown in FIGS. 2B and 2C, the zero determination is determined as “upward”, as shown in FIGS. 2D and 2E. If it is in the position, the zero determination can be made “downward”, and the scroll direction can be easily switched even when the area near the edge on the touchpad surface is the starting point. .
[0027]
“Detection of inversion of input direction” means a vector (hereinafter referred to as “input”) for each input position sequentially input after the input of the first input position, with the input position as the end point and the immediately preceding input position as the start point. The direction of “position vector” is calculated as the slope of a straight line connecting the position coordinates of both input positions, and the input at each input position depends on whether or not the absolute value of the difference from the previously calculated slope is greater than 2. This means that it is determined whether or not the angle θ (0 ° ≦ θ ≦ 180 °) formed by the position vector and the immediately preceding input position vector exceeds 90 °, and when it exceeds, it is detected as “inversion”.
[0028]
For example, in each movement locus of the input position shown in FIGS. 2B to 2E, a portion of the movement locus connecting the input positions indicated by black circles is detected as “inverted”.
Here, FIG. 2A is a conceptual diagram showing how the display on the display unit scrolls according to the movement trajectories of the input positions shown in FIGS. 2B to 2E. When the movement locus follows the locus indicated by the solid line, the display in FIG. 2A scrolls in the direction of the arrow indicated by the solid line, and when the movement locus follows the locus indicated by the dotted line, FIG. The display of (A) scrolls in the direction of the arrow indicated by the dotted line.
[0029]
Specifically, using the example of the movement locus where the movement locus from the start point shown in FIG. 2B starts at the solid line portion, the control unit 105 sequentially inputs each position coordinate from the touch pad control unit 104. Every time, the position coordinates are recorded in the memory 108, and until the position coordinates of the input positions A, B, and C are inputted, the display of the display unit 106 in FIG. When the position coordinates of A, B, and C are input, the inclinations of the straight lines AB and BC are calculated based on the recorded position coordinates of A, B, and C. Based on the absolute value of the difference, it is determined that the angle θ formed by the vector AB (input position vector at B) and the vector BC (input position vector at C) shown in FIG. Detect the reversal of the movement trajectory, Thereafter, as the input position on the touch pad surface moves along the movement locus indicated by the dotted line after the input position C in FIG. 2B, the display of the input position display unit 106 in FIG. Scroll in the direction of the arrow (upward).
[0030]
(2) Pointer movement control processing
When the control unit 105 receives position coordinate data (hereinafter referred to as “initial position coordinate data”) indicating an initial input position on the touch pad surface of the touch pad 103 from the touch pad control unit 104, the initial position coordinate is received. Data is recorded in the memory 108, a pointer is displayed at a position corresponding to the initial position coordinates on the display unit 106, and the input position is changed from the touch pad control unit 104 according to the movement of the input position on the touch pad surface. When the position coordinate data is sequentially input, the position coordinate data is recorded in the memory 108. Based on the position coordinate data and the initial position coordinate data, the position coordinate is the end point, and the initial position coordinate is the start point. Calculate the vector.
[0031]
Specifically, based on both position coordinate data (here, the position coordinates of the start point are (X1, Y1) and the position coordinates of the end point are (X2, Y2)), the direction of the movement vector ((X2- X1) / (Y2-Y1)), size ((X2-X1) ² + (Y2-Y1) ² ) ^1/2 Is calculated.
The control unit 105 moves the position of the pointer displayed on the display unit 106 in accordance with the calculated direction and size of the movement vector, and the touch pad 103 indicates that the touch pad surface is no longer touched. When it is detected and notified from the touchpad control unit 104, it is determined that the input is completed, and the process is terminated.
[0032]
FIG. 3A is a diagram illustrating a state in which the direction and the magnitude of the movement vector change as the input position moves on the touch pad surface.
A indicates initial position coordinates. As the input position moves on the touch pad surface, the movement vector starting from the initial position coordinates changes in the order of vector a, vector b, and vector c.
[0033]
FIG. 3B is a diagram showing how the pointer moves on the display unit 106 in accordance with changes in the direction and magnitude of the movement vector.
Here, directions and magnitudes corresponding to the directions and magnitudes of the movement vectors a, b, and c in FIG. 3A (represented as vectors a ′, b ′, and c ′ in FIG. 3B, respectively). This indicates that the pointer moves.
[0034]
The display unit 106 displays images and characters based on communication data input from the control unit 105, and scrolls the display and moves the position of the displayed pointer based on the control of the control unit 105. .
The input unit 107 receives an instruction to select a control program to be activated from the user, and outputs the received instruction to the control unit 105.
[0035]
Further, various inputs such as character input and telephone number input are received from the user and output to the control unit 105.
The memory 108 records position coordinate data and the like.
The microphone 109 A / D converts voice input from the user into voice data and outputs the voice data to the control unit 105.
The speaker 110 performs D / A conversion on the audio data output from the control unit 105 and outputs audio.
<Operation>
Next, the operation of the scroll control process performed by the control unit 105 will be described. FIG. 4 is a flowchart showing the above operation. Hereinafter, the operation will be described with reference to FIG.
[0036]
When the control unit 105 receives an instruction to start the scroll control program from the user via the input unit 107, the control unit 105 reads the scroll control program stored in the ROM, starts the scroll control process, and touches the touch pad surface. Whether or not the input from the user is started is determined by detecting the input of the position coordinate data from the touch pad control unit 104 (step S401), and when the input is started (step S401: Y) The initial input direction is detected (step S402), and it is determined whether the detected initial input direction is upward (step S403).
[0037]
In the case of the upward direction (step S403: Y), the display on the display unit 106 is scrolled upward (step S404), and then the direction of the input position vector at each input position sequentially input from the touchpad control unit 104 is immediately before. It is determined whether or not the input position vector is inverted (step S405).
When reversed (step S405: Y), the display on the display unit 106 is scrolled in the direction opposite to the previous scrolling direction (step S406), and the touchpad control unit 104 is no longer touched on the touchpad surface. It is determined whether or not the input from the touch pad surface is completed depending on whether or not the notification has been given (step S407).
[0038]
When the input is completed (step S407: Y), the process returns to step S401. When the input is not completed (step S407: N), the process returns to step S405.
In step S403, when the direction is not upward (step S403: N), the display on the display unit 106 is scrolled downward (step S408), and the process of step S405 is performed.
[0039]
If it is not reversed in step S405 (step S405: N), scrolling in the currently scrolling direction is continued (step S409), and the process of step S407 is performed.
Next, the operation of the pointer movement control process performed by the control unit 105 will be described. FIG. 5 is a flowchart showing the above operation. Hereinafter, a description will be given with reference to FIG.
[0040]
When the control unit 105 receives a pointer movement control program activation instruction from the user via the input unit 107, the control unit 105 reads the pointer movement control program stored in the ROM, activates the pointer movement control process, and operates the touch pad surface. It is determined by detecting the input of position coordinate data from the touchpad control unit 104 whether or not the input from the user is started through contact with the touchpad (step S501), and when the input is started (step S501). : Y), an initial input position is detected (step S502), initial position coordinate data of the initial input position is recorded in the memory 108, and a pointer is displayed on the display unit 106 at a position corresponding to the initial position coordinate ( Step S503), according to the movement of the input position on the touch pad surface, the touch pad control unit 1 4, when the position coordinate data of the input position is input, it is detected that the input position has moved (step S <b> 504: Y), the position coordinate data is recorded in the memory 108, and the position coordinate data and the initial position data are initialized. Based on the position coordinate data, a movement vector having the position coordinate as the end point and the initial position coordinate as the start point is calculated (step S505), and displayed on the display unit 106 according to the direction and size of the calculated movement vector. Whether or not the input from the touch pad surface is completed depending on whether or not the touch pad control unit 104 notifies that the touch pad surface is no longer touched (step S506). It is determined whether or not (step S507).
[0041]
When the input is completed (step S507: Y), the process returns to step S501. When the input is not completed (step S507: N), the process returns to step S504.
As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to this embodiment.
[0042]
(1) In this embodiment, the display control device is mounted on the mobile phone 100. However, the display control device may be mounted on a device having another display unit, such as a PDA (Personal Digital Assistance), a personal computer, or a digital camera. Good.
(2) In the present embodiment, in the scroll control process, the display scroll direction of the display unit 106 is switched up and down in accordance with the inversion, but it may be switched to the left and right, or the input unit 107 is scrolled. A direction switching key may be provided to select a direction (vertical direction or horizontal direction) for switching the scroll direction.
[0043]
(3) In this embodiment, in the scroll control process, the control unit 105 records the position coordinate data sequentially input from the touch pad control unit 104 in the memory 108. However, the position coordinate data is input. In step S405 of FIG. 4, the input position vector at each input position sequentially input from the touch pad control unit 104 is in the direction of the previous input position vector. If it is determined that the position has been reversed (step S405: Y), the position coordinates are moved from the start point to the end point based on the position coordinate data and the input times of the start point and end point of the input position vector determined to be reversed. The calculated moving speed is calculated, and it is determined whether or not the calculated moving speed is larger than a predetermined threshold value. As shown in the flowchart, the display on the display unit 106 is scrolled in the direction opposite to the previous scrolling direction (step S406), and whether or not the touchpad control unit 104 notifies that the touchpad surface has been removed has been notified. Thus, it may be determined whether or not the input from the touch pad surface is completed (step S407).
[0044]
As a result, when the input position is slowly moved on the touch pad surface, the scroll direction is not reversed in any direction, so the user can change the input position. The display on the display unit can be continuously scrolled in one direction without worrying about the moving direction.
(4) In the present embodiment, whether or not the angle θ (0 ° ≦ θ ≦ 180 °) formed by the input position vector at each input position and the immediately preceding input position vector exceeds 90 ° in the scroll control process. However, the angle is not limited to 90 ° but may be any angle from 0 ° to 180 °, but from the viewpoint of operability, the angle is determined to be 90 °. Any angle of 180 ° or less is desirable.
[0045]
In addition, in order to allow the user to easily and intuitively recognize the reverse direction during the input operation on the touch pad surface, the angle range is set to a narrower range (for example, 135 ° to 180 °). It is effective to do. As a result, the user can take the angle range for continuing scrolling in one direction at a sufficiently wide ratio (the former angle range / the latter angle range> 3) with respect to the angle range for reversing. The problem of unintentionally performing an input operation in the reverse direction can be reduced.
[0046]
Also, the angle used for inversion determination may be set by user input.
[0047]
【The invention's effect】
(1) The present invention is a display control device including a touch pad that receives external input through contact with a pad surface, and includes position detection means for sequentially detecting input positions on the pad surface, and first input For each input position sequentially detected after the position is detected, vector calculation means for calculating a vector having the input position as the end point and the input position detected immediately before as the start point, and the vector V at each input position _n And the vector V n at the input position detected immediately before ₁ The direction change determination means for determining whether or not the angle θ (0 ≦ θ ≦ 180 °) formed by is greater than a predetermined angle α, and the display contents of the display unit are determined according to the movement of the input positions. Scroll means for scrolling in the selected direction, and scroll control means for redefining a direction opposite to the scroll direction set immediately before as a new scroll direction only when θ is larger than α.
[0048]
(2) Moreover, this invention is a portable communication terminal provided with the display control apparatus containing the touchpad which receives the input from the outside via a pad surface, and a display part, Comprising: The said display control apparatus is to a pad surface. A position detection means for sequentially detecting the input position, and for each input position sequentially detected after the first input position is detected, a vector having the input position as the end point and the input position detected immediately before as the start point Vector calculation means for calculating a direction, and the vector V at each input position _n And the vector V n at the input position detected immediately before ₁ The display content of the display unit is determined in accordance with the direction change determination means for determining whether or not the angle θ (0 ≦ θ ≦ 180 °) formed by is greater than the predetermined angle α and the movement of each input position. Scroll means for scrolling in the direction;
Only when θ is larger than α, scroll control means for redefining a direction opposite to the scroll direction determined immediately before as a new scroll direction may be provided.
[0049]
With the configuration of (1) or (2), as long as the input position is moved in the moving direction within a predetermined range on the touch pad surface, the display content of the display unit can be continuously scrolled in one direction, By controlling the direction of movement of the input position as necessary, the scroll direction can be reversed, making it easy to control the direction of movement of the display on the display unit with less space regardless of the input position on the touchpad surface. Can be done.
[0050]
For example, if the predetermined angle α is 90 °, the user keeps scrolling in one direction on the touchpad surface at a rate larger than 50% of the possible angle range of the angle θ without reversing the scroll direction. By setting the predetermined angle α to be larger than 90 °, it is possible to continue scrolling in one direction at a larger rate.
[0051]
(3) In the configuration of (1) or (2), the position detecting unit further detects a moving direction of the input position from the first input position, and the scroll control unit is configured to detect the moving direction based on the detected moving direction. A direction for scrolling the display content of the display unit may be determined, and the display content of the display unit may be scrolled in the determined direction.
Thus, since the scroll direction of the display content on the display unit is specified based on the moving direction of the input position at the start of input, the user can specify the intended scroll direction in the initial input operation.
[0052]
(4) In any one of the constitutions (1) to (3), the display control device further includes, for each input position, movement speed calculation means for calculating a movement speed from the input position detected immediately before. Moving speed determining means for determining whether or not the calculated moving speed is greater than a threshold value, and the scroll control means determines the scroll direction only when θ is greater than α and the moving speed is greater than the threshold value. It may be reversed.
[0053]
As a result, when the input position is slowly moved on the touch pad surface, the scroll direction is not reversed in any direction, so the user can change the input position. The display unit can be easily scrolled in one direction without worrying about the moving direction, and at the same time, the scrolling direction can be reversed by quickly changing the moving direction when necessary.
[0054]
(5) In any configuration of (1) to (4), α may be 90 °.
As a result, the user can control the direction of movement of the input position on the touchpad surface within a wide range of allowable movement directions within ± 90 ° of the vector direction at the previous input position. The display content on the display can be continuously scrolled in one direction, and the scroll direction is reversed by making the moving direction of the input position larger than ± 90 ° with respect to the vector direction at the previous input position. Therefore, the display moving direction on the display unit can be easily controlled regardless of the input position.
[0055]
(6) Further, the present invention is a display control device that includes a touch pad that receives input from the outside through contact with the pad surface, and displays a pointer on the display unit in response to the input. Detection means for detecting an input position, and vector calculation means for calculating a vector having the input position as an end point and the first input position as a start point for each input position sequentially detected after the input position is first detected And a pointer movement control means for moving the pointer displayed on the display unit according to a vector calculated for the input position each time the input position is sequentially detected.
[0056]
In addition, the present invention is a display control device that includes a touch pad that receives an external input via the pad surface, and that displays a pointer on the display unit according to the input, and detects a position of the external input Means for calculating a vector having the input position as an end point and the first input position as a start point for each input position sequentially detected after the input position is first detected; The pointer movement control means for moving the pointer displayed on the display unit according to the vector calculated for the input position each time is sequentially detected.
[0057]
Thereby, it is possible to easily control the moving direction of the pointer in the display unit with a small space regardless of the input position.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing a functional configuration of a mobile phone 100 on which a display control apparatus according to the present embodiment is mounted.
FIG. 2A is a conceptual diagram showing how the display on the display unit scrolls according to the movement trajectories of the input positions shown in FIGS. 2B to 2E. 2B to 2E show the movement trajectories of the input position on the touch pad surface. FIG. 2F shows an angle θ formed by the vector AB (input position vector in B) and the vector BC (input position vector in C).
FIG. 3A is a diagram showing a state in which the direction and the magnitude of a movement vector change as the input position moves on the touch pad surface. FIG. 3B is a diagram showing how the pointer moves on the display unit 106 in accordance with changes in the direction and magnitude of the movement vector.
4 is a flowchart showing an operation of scroll control processing performed by a control unit 105. FIG.
FIG. 5 is a flowchart showing an operation of a pointer movement control process performed by a control unit 105.
FIG. 6A shows a specific example of an external view of a mobile phone in which a cross key is mounted as a pointer device. FIG. 6B illustrates a specific example of an external view of a mobile phone 100 in which the display control device in this embodiment is mounted.
[Explanation of symbols]
100 mobile phone
101 Antenna
102 Radio unit
103 touchpad
104 Touchpad controller
105 Control unit
106 Display section
107 Input section
108 memory
109 Speaker
110 microphone
601 Call key
602 Power key
603 Confirm key
604 cross key
605 numeric keypad

Claims (8)

A display control device including a touchpad that receives external input through contact with a pad surface,
Position detecting means for sequentially detecting the input position to the pad surface;
For each input position sequentially detected after the first input position is detected, a vector calculation means for calculating a vector having the input position as the end point and the input position detected immediately before as the start point;
It is determined whether or not an angle θ (0 ≦ θ ≦ 180 °) formed by the vector V _{n at} each input position and the vector V _n−1 detected immediately before is larger than a predetermined angle α. Direction change judging means for
Scroll means for scrolling the display content of the display unit in a predetermined direction in accordance with the movement of each input position;
A display control device comprising scroll control means for redefining a direction opposite to the scroll direction determined immediately before as a new scroll direction only when θ is larger than α. The position detecting means further detects a moving direction of the input position from the first input position;
The display according to claim 1, wherein the scroll control unit determines a direction in which the display content of the display unit is scrolled based on the detected moving direction, and scrolls the display content of the display unit in the determined direction. Control device. The display control device further includes
For each input position, a moving speed calculating means for calculating a moving speed from the input position detected immediately before,
A moving speed determining means for determining whether or not the calculated moving speed is greater than a threshold,
The display control apparatus according to claim 1, wherein the scroll control unit reverses the scroll direction only when θ is larger than α and the moving speed is larger than a threshold value. The display control device according to claim 1, wherein α is 90 °. A mobile communication terminal comprising a display control device including a touchpad that receives an external input via a pad surface, and a display unit,
The display control device includes:
Position detecting means for sequentially detecting the input position to the pad surface;
For each input position detected sequentially after the first input position is detected, a vector calculation means for calculating the direction of a vector having the input position as the end point and the input position detected immediately before as the end point;
It is determined whether or not an angle θ (0 ≦ θ ≦ 180 °) formed by the vector V _{n at} each input position and the vector V _n−1 detected immediately before is larger than a predetermined angle α. A direction change determining means that performs scrolling means for scrolling the display content of the display unit in a predetermined direction in accordance with the movement of each input position;
A mobile communication terminal comprising scroll control means for redefining a direction opposite to the scroll direction determined immediately before as a new scroll direction only when θ is larger than α. The position detecting means further detects a moving direction of the input position from the first input position;
The scroll control means specifies a direction in which the display content of the display unit is scrolled based on the detected moving direction, and scrolls the display content of the display unit in one specified direction according to the movement of the input position. The mobile communication terminal according to claim 5. The display control device further includes
For each input position, a moving speed calculating means for calculating a moving speed from the input position detected immediately before,
A moving speed determining means for determining whether or not the calculated moving speed is greater than a threshold,
The mobile communication terminal according to claim 5 or 6, wherein the scroll control means reverses the scroll direction when θ is larger than α and the moving speed is larger than a threshold value. α is 90 °. The mobile communication terminal according to claim 5 , wherein α is 90 °.

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