JP3593827B2 - Screen scroll control device and scroll control method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a screen scroll control device and a scroll control method using coordinate input means such as a touch panel.
[0002]
[Prior art]
In general, in applications such as car navigation, a DRAW tool, and CAD, a scroll operation of a screen for moving a display screen of a display device in up, down, left, and right directions is frequently used. Conventionally, a joystick connected to a computer, a scroll bar of a keyboard, or the like has been used as an operation input unit for scrolling a display screen of a display device.
[0003]
[Problems to be solved by the invention]
By the way, with the operation method using a joystick or a scroll bar, which has been widely used, it has been difficult for a user who is not used to operating a computer or the like to intuitively imagine the operation method.
[0004]
In addition, the screen scrolling method using a joystick or a scroll bar has a problem in that when the screen scrolling operation is continued, the operation must always be continuously performed from the input device, and the burden on the user is large. Was.
[0005]
Therefore, an object of the present invention is to provide a screen scroll control device and a screen control method that allow a user to easily perform a screen scroll operation in operation of a computer or the like in view of the conventional problems as described above. is there.
[0006]
[Means for Solving the Problems]
A screen scroll control device according to the present invention includes a storage unit for temporarily storing display information, a display control unit for performing display control according to the display information read from the storage unit, and a display control unit. Screen display means for performing a screen display in accordance with the display information read from the storage means, coordinate input means, and writing of display information to the storage means based on the input coordinates by the coordinate input means Control means for controlling the readout and controlling the display control means to scroll the display screen by the screen display means, wherein the control means performs displacement scrolling while there is a coordinate input from the coordinate input means. State, and on the other hand, when the coordinate input from the coordinate input means is stopped, control is performed such that the inertia scroll state is established. In the scroll state, the display screen is controlled to scroll by a vector equal to the change vector of the input coordinates. On the other hand, in the inertial scroll state, the display screen is controlled by a vector proportional to the change vector of the input coordinates immediately before the coordinate input disappears. , And is controlled so that the scroll speed of the display screen is reduced as time passes.
[0010]
Further, for example, a touch panel is used as the coordinate input means in the screen scroll control device according to the present invention.
[0011]
The present invention is a screen scroll control method for controlling writing / reading of display information based on input coordinates to be input and for scrolling a display screen according to a screen display, wherein the coordinate input according to the input coordinates is performed. A certain period is set as a displacement scroll state, and in the displacement scroll state, the display screen is controlled to be scrolled by a vector equal to a change vector of input coordinates, and on the other hand, when there is no coordinate input from the coordinate input means, an inertial scroll state is set. In the inertial scroll state, the display screen is scrolled by a vector proportional to the change vector of the input coordinates immediately before the coordinate input disappears, and the scroll speed of the display screen is reduced with time.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 shows a hardware configuration for realizing the scroll control method according to the present invention.
[0017]
The screen scroll control device 10 having the hardware configuration shown in FIG. 1 includes a storage unit 1 for temporarily storing display information, and a display control unit 2 to which the display information read from the storage unit 1 is supplied. A screen display unit 3 controlled by the display control unit 2, a coordinate input unit 4 using a touch panel, and writing / reading of display information to / from the storage unit 1 based on input coordinates by the coordinate input unit 4. A control unit 5 that controls the display control unit 2 and controls the display control unit 2 to scroll the display screen of the screen display unit 3 is applied to, for example, a car navigation system, a DRAW tool, a CAD system, and the like.
[0018]
In the scroll control device 10, the storage unit 1 includes, for example, a video RAM that temporarily stores display information of an area AR _MEMO wider than a display range AR _DSP of the screen display unit 3 as shown in FIG. Under the control of the control unit 5, display information is written from a main storage device (not shown), and display information for one screen is read. In addition, the display control unit 2 scrolls the screen display of the screen display unit 3 according to the display information read from the storage unit 1 by providing the scroll data to the scroll register by the control unit 5. Display control is performed. The screen display unit 3 is a display device using, for example, a cathode ray tube, a liquid crystal display device, or the like, and is controlled by the display control unit 2 and responds to display information read from the storage unit 1. The screen is displayed. The coordinate input unit 4 is for inputting coordinates by touching a touch panel provided on the front surface of the display screen of the screen display unit 3, and supplies the input data to the control unit 5. I have.
[0019]
The control unit 5 includes, for example, a microcomputer, and controls the screen display unit 3 to scroll the display screen based on the input data from the coordinate input unit 4 according to the procedure shown in the flowchart of FIG. Do.
[0020]
That is, first, the control unit 5 is in a standby state (step S1) waiting for an input from the coordinate input unit 4 using the touch panel, and in the next determination process (step S2), the input from the coordinate input unit 4 is performed. The state of contact with the touch panel is determined based on the presence or absence of data, and when it is determined that the touch panel is in the release state, that is, in the non-contact state, the operation of returning to step S1 is repeated. Then, in the determination process of step S2, when it is determined that input data is generated due to contact with the touch panel and the touch state, that is, the touch state is determined, the state transits to the displacement scroll state (step S3).
[0021]
In the displacement scroll state (step S3), based on the change vector of the input coordinates given as the input data from the coordinate input unit 4, control is performed to scroll the screen by a vector equal to or proportional to the change vector. In the determination process (step S4), the touch state on the touch panel is determined based on the presence or absence of the input data from the coordinate input unit 4, and it is determined that the input data due to the touch on the touch panel is in a certain touch state, that is, the touch state. If so, the process returns to step S3, and the control of scrolling the screen by the amount of change according to the change vector of the input coordinates is repeatedly performed. If it is determined in the determination process of step S4 that the input data due to the touch on the touch panel has disappeared and the release state, that is, the non-contact state has been determined, the process transits to the inertial scroll (step 5).
[0022]
In this inertial scroll (step 5), control is performed to scroll the screen by a vector equal to or proportional to the change vector based on the change vector of the input coordinates immediately before the coordinate input due to the touch on the touch panel disappears. In the determination process (step S6), the state of contact with the touch panel is determined based on the presence or absence of input data from the coordinate input unit 4, and the release state where there is no input data due to the touch on the touch panel, that is, the non-contact state. When the determination is made, the process returns to the step 5, and the control of scrolling the screen by a shift amount corresponding to the change vector of the input coordinates immediately before the coordinate input disappears is repeatedly performed. If it is determined in the determination process of step S6 that the input data due to the touch on the touch panel has entered a touch state, that is, a contact state, the state transits to the above-described displacement scroll state (step S3).
[0023]
In the inertial scroll state (step 5), the scroll amount can be gradually attenuated by setting the attenuation amount as in the state where the frictional force is working. In this case, when the scroll amount becomes zero, the process returns to the above-described standby state (step S1).
[0024]
Here, regarding a specific example of the control in the inertial scroll state, as shown in FIG. 4, the sampling point immediately before the coordinate input from the coordinate input unit 4 using the touch panel is stopped is set to point A, and the point A is set. Is described as (tx, ty), the sampling point immediately before the coordinate input from the coordinate input unit 4 is stopped is point B, and the coordinates of the point B are (rx, ry).
[0025]
Scroll amount in this case, a proportionality constant Kx, and Ky Since proportional to the amount of change in the input coordinates from the coordinate input unit 4, the scroll amount scrY ₀ scroll amount scrx 0, _y direction in the x direction ,
scrx ₀ = Kx (rx−tx)
scry ₀ = Ky (ry-ty)
It becomes.
[0026]
In the inertial scroll state, the scroll amount is gradually attenuated with time, so that the initial value of the scroll vector amount scrv ₀ is
scrv ₀ = (scrx ₀ ² + scry ₀ ² ) ^1/2
Therefore, assuming that the elapsed time from the inertial scroll state is t and the attenuation is F, the scroll vector amount scrv at time t is
scrv = scrv ₀ −t / F> 0
Given by When the angle of the scroll vector with respect to the x axis is θ, the scroll amount scrx in the x direction and the scroll amount scry in the y direction are:
scrx = scrv × cos θ
scry = scrv × sin θ
Can be obtained at The control unit 5 calculates the scroll amount scrx in the x direction and the scroll amount scry in the y direction by such arithmetic processing, and controls the inertial scroll (step 5). The amount of attenuation may be arbitrarily varied. Further, the display screen may be scrolled by a fixed scroll amount until the next coordinate input without attenuation.
[0027]
In the car navigation system to which the scroll control device 10 having such a configuration is applied, while the finger of the user touches the coordinate input unit 4 provided on the front surface of the display screen of the screen display unit 3, that is, the touch panel, the above-described operation is performed. In the displacement scroll state, for example, the display screen, that is, the map moves so as to coincide with the movement amount of the finger indicated by the arrow in FIG.
[0028]
When the user removes his / her finger from the touch panel, the above-described inertial scroll state is set, and the map is continued while maintaining the scroll amount immediately before.
[0029]
Further, the user can stop the scrolling by touching the touch panel while the map is scrolling.
[0030]
Furthermore, by setting the amount of attenuation of the scroll, the scroll speed of the map can be gradually attenuated and finally stopped. This coincides with, for example, an image in which a partial rectangular area of the globe is displayed on the screen and the globe is rotated.
[0031]
As described above, in the scroll control device 10 according to the present embodiment, since the operation method and operation for scrolling are close to actual physical phenomena in the real world, the scroll operation without discomfort can be performed, and even for a person who operates for the first time. It can be easily operated.
[0032]
Note that the coordinate input unit 4 is not limited to a touch panel, but may be a mouse, a tablet, or the like. Further, the scroll control device 10 according to the present invention can be applied not only to a car navigation system but also to various other applications such as a DRAW tool and a CAD system.
[0033]
【The invention's effect】
As described above, according to the present invention, while there is a coordinate input, the display screen is scrolled with a vector based on the change vector of the input coordinate, and when the coordinate input disappears, the change vector of the input coordinate immediately before the coordinate input disappears. The display screen is scrolled by the vector based on, so that the user can perform the scroll operation without continuing the input. Therefore, the burden on the user can be reduced in applications that use scroll operations frequently, such as car navigation, DRAW tools, and CAD.
[0034]
Further, according to the present invention, a scroll operation can be performed with an interface close to a daily operation, and it becomes possible for a person who operates for the first time to easily operate.
[0035]
Further, according to the present invention, since the scrolling behavior of the screen is close to the physical phenomenon of the real world, the scrolling operation without a sense of incongruity can be performed.
[Brief description of the drawings]
FIG. 1 is a block diagram of a scroll control device showing a hardware configuration for realizing a scroll control method according to the present invention.
FIG. 2 is a conceptual diagram showing a method of scrolling a screen by the scroll control device.
FIG. 3 is a flowchart showing a control procedure of screen scrolling by a control unit in the scroll control device.
FIG. 4 is a diagram for describing a specific example of control in an inertial scroll state by the control unit.
[Explanation of symbols]
1 storage unit, 2 display control unit, 3 screen display unit, 4 coordinate input unit, 5 control unit

Claims (3)

Storage means for temporarily storing display information;
Display control means for performing display control according to the display information read from the storage means,
A screen display unit that is controlled by the display control unit and performs a screen display according to the display information read from the storage unit;
Coordinate input means;
Control means for controlling writing / reading of display information to / from the storage means based on the input coordinates by the coordinate input means and controlling the display control means to scroll a display screen by the screen display means;
The control means controls the displacement scroll state while there is a coordinate input from the coordinate input means, and performs an inertial scroll state when there is no coordinate input from the coordinate input means, In the displacement scroll state, control is performed so as to scroll the display screen with a vector equal to the change vector of the input coordinates. A scroll control device for a screen, wherein the display screen is scrolled and the scroll speed of the display screen is controlled to decrease with time. 2. The screen scroll control device according to claim 1, wherein said coordinate input means comprises a touch panel. A screen scroll control method for controlling writing / reading of display information based on input coordinates to be input and scrolling a display screen related to the screen display,
While there is a coordinate input related to the input coordinates, a displacement scroll state is set,
In the displacement scroll state, the display screen is controlled to scroll by a vector equal to the change vector of the input coordinates,
On the other hand, when there is no coordinate input from the coordinate input means, an inertial scroll state occurs,
In the inertial scroll state, the display screen is scrolled by a vector proportional to a change vector of the input coordinates immediately before the coordinate input disappears, and the scroll speed of the display screen is reduced with time. Scroll control method.

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