JP2020129039A - Display device, display method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device, a display method and a program capable of changing the drawing position of drawing information according to the size of a display area on a display screen. A display area setting unit sets a display area having an area corresponding to the remaining amount of a battery for driving a display in a display screen of the display. Then, the designated position detecting unit detects the designated position with respect to the display area, and the designated position storage unit stores the setting state of the display area and the coordinates of the designated position in association with each other. The drawing control unit draws drawing information at a designated position. Then, when the display area setting unit changes the display area setting, the display control unit sets the display area based on the changed display area setting state and the information stored in the instruction position storage unit. The drawing information drawn before the change is enlarged or reduced and displayed. [Selection diagram] Fig. 3

Description

The present invention relates to a display device, a display method and a program.

2. Description of the Related Art In recent years, a display device is known in which a user can draw a line, a figure, or the like on a display unit by inputting by tracing a surface of a display screen with a finger.

In a display device having such a drawing function, a technique has been proposed in which the display area is reduced and the power consumption is suppressed according to the remaining amount of battery power.

However, according to the technique, when the user performs drawing in a state where the display area is reduced and then the charge amount of the battery is restored and the display area returns to the state before the reduction, the drawing information is drawn in the display image. There is a problem that the position shifts.

The present invention has been made in view of the above, and provides a display device, a display method, and a program capable of changing a drawing position of drawing information according to a size of a display area on a display screen. To aim.

In order to solve the above-mentioned problems and achieve the object, the present invention is a display device driven by a battery, wherein a display area corresponding to the remaining amount of the battery is provided in a display screen of the display device. A display area setting unit to be set, a pointing position detection unit to detect a pointing position to the display area, a pointing position storage unit to store the setting state of the display area and coordinates of the pointing position in association with each other, Based on the drawing control unit that draws the drawing information at the position, the changed setting state when the display area setting unit changes the setting of the display area, and the information stored by the designated position storage unit. And a display control unit for displaying the drawing information drawn before the setting of the display area is changed in an enlarged or reduced manner.

According to the present invention, in a display device that is driven by a battery and draws through a touch panel, when the display area is reduced when the remaining amount of the battery decreases due to discharge, and when the remaining amount of the battery increases due to charging. In this case, even when the display area is enlarged, it is possible to prevent the drawing position from deviating from the display image.

FIG. 1 is an external perspective view of an electronic blackboard that is an application example of a display device. FIG. 2 is a hardware block diagram showing an example of the hardware configuration of the electronic blackboard. FIG. 3 is a functional block diagram showing an example of the functional configuration of the controller unit of the electronic blackboard. FIG. 4 is a diagram illustrating an outline of the operation of the electronic blackboard. FIG. 5 is a diagram illustrating a method of setting a narrow display area on the display screen of the display when the remaining battery level is low. FIG. 6 is a diagram illustrating a method of enlarging and reducing drawing information. FIG. 7 is a flowchart showing an example of the flow of processing performed by the electronic blackboard.

(Explanation of electronic blackboard)
The outline of the electronic blackboard 10 according to the embodiment will be described below with reference to the accompanying drawings. FIG. 1 is an external perspective view of an electronic blackboard 10 which is an application example of a display device. As shown in FIG. 1, the electronic blackboard 10 includes a display 280, a controller unit 11, a battery unit 41, and a touch sensor 214.

The display 280 is a display device that outputs drawing information and image information, and is composed of a liquid crystal panel, an organic EL panel, or the like. The display 280 includes a display screen 42 that displays image information and drawing information. The display 280 is an example of a display device.

The controller unit 11 and the battery unit 41 are mounted inside the housing of the display 280. The controller unit 11 controls the entire operation of the electronic blackboard 10. The battery unit 41 supplies electric power to the electronic blackboard 10. The battery 224 is, for example, a primary battery such as a manganese battery or an alkaline battery, or a secondary battery such as a lithium ion battery or a nickel-hydrogen battery.

The touch sensor 214 performs input of coordinates and detection of coordinates by, for example, an infrared blocking method. Specifically, the touch sensors 214 are installed at both upper ends of the display 280. The touch sensor 214 includes both a light emitting unit that emits infrared rays and a light receiving unit that receives infrared rays. The touch sensor 214 emits a plurality of infrared rays parallel to the screen of the display 280. The emitted infrared light is reflected by a reflecting member provided around the display 280, returns on the same optical path as the optical path of the emitted infrared light, and is received by the light receiving unit. At that time, if there are objects such as a hand or an electronic pen on the screen, infrared rays reflected by these objects are detected by the light receiving unit. At this time, the two touch sensors 214 simultaneously receive the infrared rays reflected from the object, and specify the coordinate position where the object contacts, based on the principle of triangulation.

(Explanation of hardware configuration of electronic blackboard)
Next, the hardware configuration of the electronic blackboard 10 will be described with reference to FIG. FIG. 2 is a hardware block diagram showing an example of the hardware configuration of the electronic blackboard 10.

As shown in FIG. 2, the electronic blackboard 10 includes a controller unit 11, a display unit 21, a touch panel unit 31, and a battery unit 41.

The controller unit 11 controls the entire operation of the electronic blackboard 10. The controller unit 11 includes a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, and an SSD (Solid State Drive) 204.

The CPU 201 controls the overall operation of the electronic blackboard 10. The ROM 202 stores programs used for driving the CPU 201 such as the CPU 201 and IPL (Initial Program Loader). The RAM 203 is used as a work area for the CPU 201. The SSD 204 stores various data such as a program for an electronic blackboard.

The program executed by the CPU 201 is a file in a format that can be installed in the controller section 11 or that can be executed in addition to being provided by being pre-installed in the ROM 202, and is a CD-ROM, a flexible disk (FD), a CD-R. Alternatively, it may be configured to be provided by being recorded in a computer-readable recording medium such as a DVD. Further, the program may be stored in a computer connected to a network such as the Internet and provided by being downloaded via the network. Also, the program may be configured to be provided or distributed via a network such as the Internet.

The display unit 21 displays drawing information drawn by the hand H or the electronic pen 290 and image information input from an external device. The display unit 21 includes a GPU (Graphics Processing Unit) 212, a display controller 213, and a display 280.

The GPU 212 is a semiconductor chip that specializes in graphics such as drawing information and image information. The display controller 213 controls and manages screen display in order to output the output image from the GPU 212 to the display 280 or the like. Further, the display controller 213 controls the state of the backlight of the display 280 (lighting, extinguishing, dimming, brightening, etc.).

The touch panel unit 31 includes a touch sensor 214 and a touch panel controller 215. The touch sensor 214 is a sensor that detects that the electronic pen 290, the hand H of the user, or the like has come into contact with the display 280, and the position where the touch has been made. The outline of the touch sensor 214 is as described above. The touch panel controller 215 controls the operation of the touch sensor 214.

Note that the touch sensor 214 is not limited to the infrared blocking method, but is a capacitance type touch panel that identifies a contact position by detecting a change in capacitance, and a contact position is identified by a voltage change between two opposing resistance films. A detection unit such as a resistive film type touch panel or an electromagnetic induction type touch panel that detects electromagnetic induction generated when a contact object touches the display unit and specifies the contact position may be used.

The electronic pen 290 described above is controlled by an electronic pen controller 216 included in the electronic blackboard 10. By communicating with the electronic pen 290, the electronic pen controller 216 determines whether the display 280 is touched by the pen tip or the pen tip. It should be noted that the electronic pen controller 216 may determine whether or not there is a touch on the portion of the electronic pen 290 gripped by the user, or other portions of the electronic pen 290, as well as the pen tip and pen bottom of the electronic pen 290.

The battery unit 41 includes a battery 224 and a battery controller 225. The battery 224 supplies power to the electronic blackboard 10. The battery controller 225 manages the remaining amount of the battery 224. The electronic blackboard 10 may further include, as the battery unit 41, a power supply unit that receives an AC power source and supplies it to the electronic blackboard 10. The battery 224 is provided so that the electronic whiteboard 10 can be used even in a place where AC power cannot be supplied.

The electronic whiteboard 10 further includes a network I/F (Interface) 205 and an external device connection I/F 206. The network I/F 205 controls communication with a communication network not shown in FIG. The external device connection I/F 206 is an interface for connecting various external devices. In this case, the external device is, for example, a USB (Universal Serial Bus) memory 230 and an external device (microphone 240, speaker 250, camera 260).

The electronic blackboard 10 also includes a capture device 211, a short-range communication circuit 219, an antenna 219a of the short-range communication circuit 219, a power switch 222, and a selection switch 223.

The capture device 211 causes the display of an external PC (Personal Computer) 270 to display video information as a still image or a moving image.

The near field communication circuit 219 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark).

The power switch 222 is a switch for switching ON/OFF the power of the electronic blackboard 10. The selection switches 223 are, for example, a group of switches for adjusting the brightness and shade of the display on the display 280.

Further, the electronic blackboard 10 includes a bus line 210. The bus line 210 is an address bus, a data bus, or the like for electrically connecting the respective components such as the CPU 201 shown in FIG.

(Explanation of hardware configuration of electronic blackboard)
Next, the functional configuration of the controller unit 11 of the electronic whiteboard 10 will be described with reference to FIG. FIG. 3 is a functional block diagram showing an example of the functional configuration of the controller unit 11 of the electronic blackboard 10.

The controller unit 11 shown in FIG. 2 realizes each functional unit shown in FIG. 3 inside the CPU 201 by executing a program used to drive the CPU 201. That is, the controller unit 11 includes a battery remaining amount detection unit 111, a display area setting unit 112, a backlight control unit 113, a designated position detection unit 114, a designated position storage unit 115, a drawing control unit 116, and a display. The control unit 117 and the operation control unit 118 are realized as a functional unit.

The battery remaining amount detection unit 111 detects the remaining amount of the battery 224.

The display area setting unit 112 sets a display area in the display screen 42 of the display 280 (display device) according to the remaining amount of the battery 224. In addition, in the present embodiment, the display area setting unit 112 sets the display area having an area corresponding to the remaining amount of the battery 224, but the display area setting method is not limited thereto.

The backlight control unit 113 controls the state of the backlight of the display 280. In particular, the backlight control unit 113 turns off the backlight of a region other than the display region in the display screen 42 according to the setting of the display region setting unit 112.

The designated position detection unit 114 detects a designated position with respect to the display area.

The designated position storage unit 115 stores the setting state of the display area and the coordinates of the designated position in association with each other.

The drawing control unit 116 causes the drawing information to be drawn at the designated position.

When the display area setting unit 112 changes the setting of the display area, the display control unit 117 sets the display area based on the changed setting state of the display area and the information stored in the pointing position storage unit 115. The drawing information drawn before is changed is displayed enlarged or reduced.

The operation control unit 118 receives various operations on the electronic blackboard 10. The operation control unit 118 also transmits information corresponding to the received operation to the controller unit 11.

(Explanation of hardware configuration of electronic blackboard)
Next, with reference to FIG. 4, an operation outline of the electronic blackboard 10 in the present embodiment will be described. FIG. 4 is a diagram for explaining an outline of the operation of the electronic blackboard 10.

FIG. 4A shows a state (state 1) in which the entire display screen 42 of the display 280 is set in the display area 43a by the action of the display area setting unit 112. Then, when the user of the electronic blackboard 10 draws on the display area 43a with the hand H or the electronic pen 290 when the display 280 is in the state of FIG. 4A, the drawing position detected by the pointing position detecting unit 114. Then, the drawing control unit 116 causes the drawing information 50a to be drawn. Then, the designated position storage unit 115 stores the setting of the display area 43a and the drawing position of the drawing information 50a in association with each other.

FIG. 4B shows a state (state 2) in which the remaining amount of the battery 224 becomes less than a preset threshold due to the discharge of the battery 224. That is, when the battery remaining amount detecting unit 111 detects that the remaining amount of the battery 224 has become less than the threshold value, the display area setting unit 112 sets the display area 43a in order to suppress the power consumption of the display 280. The reduced display area 43b is set. Then, the backlight control unit 113 further turns off the backlight of the area 43c on the display screen 42 other than the display area 43b. That is, the entire area 43c is black.

Then, in the state of FIG. 4B, the display control unit 117 reduces the drawing information 50a drawn in the state before the display screen 42 is reduced to a state corresponding to the display area 43b, and draws it. The information 50b is displayed.

Further, the information drawn in the state of FIG. 4B is drawn as drawing information 50c at the drawn position. At this time, if the hand H or the electronic pen 290 makes contact with the area 43c, the designated position detection unit 114 ignores the contact. Alternatively, the pointed position detection unit 114 may set the area 43c outside the detection range.

The drawing information 50b displayed in the state of FIG. 4B and the drawing information 50c drawn in the state of FIG. 4B are set in the display area 43b by the action of the designated position storage unit 115. It is stored in association with being present.

Next, FIG. 4C shows a state (state 3) in which the battery 224 is charged and the remaining amount of the battery 224 exceeds a preset threshold value. Although the state 3 is the same as the state 1, the state 3 will be described for convenience of explanation.

When the battery remaining amount detecting unit 111 detects that the remaining amount of the battery 224 exceeds the threshold value, the display area setting unit 112 sets the display area 43a on the display 280. Then, the backlight control unit 113 further turns on all the backlights.

Then, in the state of FIG. 4C, the display control unit 117 enlarges the drawing information 50b, 50c drawn in the state before the display screen 42 is enlarged to a state corresponding to the display area 43a. indicate. That is, the drawing information 50a and 50d are displayed.

Then, the drawing information 50a, 50d displayed in the state of FIG. 4C is stored by the action of the designated position storage unit 115 in association with the fact that the display area 43a is set.

After that, the state 1 (state 3) and the state 2 are alternately changed according to the remaining amount of the battery 224.

Although the display areas 43a and 43b have been described as being changed in two steps according to the remaining capacity of the battery 224 in FIG. 4, the number of display areas set is not limited to two. That is, the display area may be finely changed in multiple stages according to the remaining amount of the battery 224.

(Explanation of display area setting method)
Next, a method of setting the display area 43b will be described with reference to FIG. FIG. 5 is a diagram illustrating a method of setting a narrow display area 43b on the display screen 42 of the display 280 when the remaining amount of the battery 224 is low.

In the widest state (display area 43a in FIG. 4A), the display screen 42 of the display 280 has an upper left point A(0, 0, with the horizontal direction of the display screen 42 as the x-axis and the vertical direction as the y-axis. It is assumed that the image information and the drawing information can be displayed in the range from 0) to the lower right point B(M,N). Then, the display area setting unit 112 sets the reduced display area 43b near the center of the display screen 42.

It is assumed that the display area 43b can display image information and drawing information in the range from the upper left point C(a,b) to the lower right point D(c,d). In the example of FIG. 5, the display area 43b is set near the center of the display screen 42, but the setting position of the display area 43b is not limited to this. That is, for example, the display area 43b may be set so that the point A(0,0) and the point C(a,b) are in a matched state.

The designated position storage unit 115 stores the coordinates of the point C (a, b) and the point D (c, d) as the setting state of the display area 43b. That is, the coordinates of the point C (a, b) and the point D (c, d) represent the position of the display area 43b. Further, the size of the display area 43b, that is, the horizontal size (c-a) and the vertical size (d-b) is calculated from the coordinates of the point C (a, b) and the point D (c, d). It

(Explanation of enlargement/reduction method of drawing information)
Next, a method for enlarging and reducing drawing information will be described with reference to FIG. FIG. 6 is a diagram illustrating a method of enlarging and reducing drawing information.

As described above, the designated position storage unit 115 stores that the display area 43b is set on the display screen 42 of the display 280 and the drawing position of the drawing information drawn therein in association with each other. For example, as shown in FIG. 6, when the display area 43b is set, the coordinates of the point U, which is the drawing position of the drawing information, are stored. Since the drawing information is generally a figure in which a plurality of points are continuous, the coordinates of a plurality of points U are stored. Here, for simplification of description, it is assumed that the drawing position is only the point U(p, q).

At this time, it is assumed that the display area setting unit 112 enlarges the display area and sets the display area 43a. At this time, the display control unit 117 moves the point U(p,q) to the point V(r,s) calculated by the equations (1) and (2).

r={(p-a)/(c-a)}*M... (1)
s={(q-b)/(d-b)}*N (2)

That is, the display control unit 117 determines the position of the point V(r,s) in the display area 43a so as to be equal to the relative position of the point U(p,q) with respect to the display area 43b.

Conversely, when the display area setting unit 112 reduces the display area and changes the display area 43a to the display area 43b, the point V(r,s) is calculated by the equations (3) and (4). To the point U(p,q) to be processed.

p=(r/M)*(c−a)+a (3)
q=(s/N)*(d−b)+b (4)

The display control unit 117 also enlarges or reduces the image information displayed in the display area 43a or the display area 43b according to the change of the setting state of the display area.

(Explanation of the flow of processing performed by the electronic blackboard)
Next, a flow of processing performed by the electronic blackboard 10 will be described with reference to FIG. 7. FIG. 7 is a flowchart showing an example of the flow of processing performed by the electronic blackboard 10.

The operation control unit 118 activates the electronic blackboard 10 by detecting a user's activation operation (step S11).

The battery remaining amount detection unit 111 determines whether the remaining amount of the battery 224 is equal to or more than the threshold value (step S12). When it is determined that the remaining amount of the battery 224 is equal to or more than the threshold value (step S12: Yes), the process proceeds to step S13. On the other hand, if it is not determined that the remaining amount of the battery 224 is equal to or more than the threshold value (step S12: No), the process proceeds to step S15.

When it is determined Yes in step S12, the display area setting unit 112 sets the display area to "state 1" (step S13). That is, the display area 43a is set. If the display area 43a has already been set, the display area setting unit 112 does nothing. Then, the backlight control unit 113 turns on all the backlights of the display screen 42 (step S14). Then, it progresses to step S17.

When it is determined No in step S12, the display area setting unit 112 sets the display area to "state 2" (step S15). That is, the display area 43b is set. If the display area 43b has already been set, the display area setting unit 112 does nothing. Then, the backlight control unit 113 turns off the backlight at positions other than the position corresponding to the display area 43b of the display screen 42 (step S16). Then, it progresses to step S19.

Following step S14, the display area setting unit 112 determines whether the setting of the display area has changed from "state 2" to "state 1" (step S17). When it is determined that the setting of the display area has changed from "state 2" to "state 1" (step S17: Yes), the process proceeds to step S18. On the other hand, if it is not determined that the setting of the display area has changed from "state 2" to "state 1" (step S17: No), the process proceeds to step S21.

When it is determined Yes in step S17, the display control unit 117 enlarges the image information displayed in the display area 43b and the drawing information drawn in the display area 43b so as to fit the display area 43a. (Step S18). Then, it progresses to step S21.

Further, following step S16, the display area setting unit 112 determines whether the setting of the display area has changed from "state 1" to "state 2" (step S19). When it is determined that the setting of the display area has changed from "state 1" to "state 2" (step S19: Yes), the process proceeds to step S20. On the other hand, if it is not determined that the setting of the display area has changed from "state 1" to "state 2" (step S19: No), the process proceeds to step S21.

When it is determined Yes in step S19, the display control unit 117 reduces the image information displayed in the display area 43a and the drawing information drawn in the display area 43a so as to fit the display area 43b. (Step S20). Then, it progresses to step S21.

The pointed position detection unit 114 determines whether the pointed position is detected in the display area 43a or the display area 43b set at that time (step S21). If it is determined that the designated position is detected (step S21: Yes), the process proceeds to step S22. On the other hand, if it is not determined that the designated position is detected (step S21: No), the process proceeds to step S24.

When it is determined Yes in step S21, the drawing control unit 116 draws the drawing information at the designated position (step S22).

Subsequently, the designated position storage unit 115 stores the setting state of the display area and the designated position in association with each other (step S23).

When it is determined No in step S21, or after executing step S23, the operation control unit 118 determines whether or not the operation end of the electronic blackboard 10 is instructed by detecting the end operation of the user ( Step S24). When it is determined that the operation end of the electronic whiteboard 10 has been instructed (step S24: Yes), the process of FIG. 7 ends. On the other hand, if it is not determined that the operation end of the electronic whiteboard 10 is instructed, the process returns to step S12 and repeats the above-described processing.

As described above, according to the display 280 (display device) of the present embodiment, the display area setting unit 112 displays the display screen 42 of the display 280 according to the remaining amount of the battery 224 that drives the display 280. The display area 43a or the display area 43b of the area is set. Then, the pointed position detection unit 114 detects the pointed position with respect to the display area, and the pointed position storage unit 115 stores the setting state of the display areas (43a, 43b) and the coordinates of the pointed position in association with each other. Then, the drawing control unit 116 causes the drawing information to be drawn at the designated position. Further, when the display area setting unit 112 changes the setting of the display areas (43a, 43b), the display control unit 117 sets the changed setting status of the display area and the information stored in the pointing position storage unit 115. Based on this, the drawing information drawn before the setting of the display area is changed is enlarged or reduced and displayed. Therefore, even if the size of the display area of the display 280 changes, it is possible to prevent the positional deviation of the drawing information with respect to the display area.

Further, according to the display 280 of the present embodiment, the display area setting unit 112 sets the narrow display area 43b when the remaining amount of the battery 224 is less than the threshold, and the remaining amount of the battery 224 exceeds the threshold. In this case, a large display area 43a is set. Therefore, the display area can be set according to the remaining amount of the battery 224.

Further, according to the display 280 of the present embodiment, when the display area setting unit 112 reduces the display area 43a in the display screen 42 to the display area 43b, the backlight control unit 113 causes the display area 43a to display the area other than the display area 43b. Turn off the backlight of the area. Therefore, it is possible to prevent the remaining amount of the battery 224 from decreasing.

Further, according to the display 280 of the present embodiment, the setting state of the display area is based on the position (for example, the upper left coordinate and the lower right coordinate of the display area) and the size (for example, the number of vertical and horizontal pixels of the display area) of the display area. is there. Therefore, the setting state of the display area can be easily stored.

Further, according to the display 280 of the present embodiment, the display control unit 117 causes the relative position of the drawing information with respect to the display area before the setting change, the relative size of the drawing information with respect to the display area, and the display area after the setting change. The drawing information before the setting change is enlarged or reduced so that the relative position of the drawing information and the relative size of the drawing information with respect to the display area become equal. Therefore, according to the size of the display area on the display screen 42, the drawing position of the drawing information can be changed so that the relative position to the display area becomes constant.

Although the embodiments of the present invention have been described above, the above-described embodiments are presented as examples and are not intended to limit the scope of the present invention. This new embodiment can be implemented in various other forms. Further, various omissions, replacements, and changes can be made without departing from the spirit of the invention. Further, this embodiment is included in the scope and the gist of the invention, and is also included in the invention described in the claims and the scope equivalent thereto.

10 Electronic Blackboard 42 Display Screens 43a, 43b Display Areas 50a, 50b, 50c, 50d Drawing Information 111 Battery Level Detecting Section 112 Display Area Setting Section 113 Backlight Control Section 114 Pointing Position Detecting Section 115 Pointing Position Storage Section 116 Drawing Control Section 117 Display Control Unit 224 Battery 280 Display (Display Device)
290 Electronic pen H hand

JP, 2012-157100, A

Claims (7)

A display device driven by a battery,
In the display screen of the display device, a display area setting unit for setting a display area according to the remaining amount of the battery,
A pointing position detection unit that detects a pointing position for the display area,
A designated position storage unit that stores the setting state of the display area and the coordinates of the designated position in association with each other;
A drawing control unit for drawing drawing information at the designated position,
When the display area setting unit changes the setting of the display area, before the setting of the display area is changed based on the changed setting state and the information stored in the designated position storage unit. A display control unit for displaying the drawn drawing information by enlarging or reducing it;
Display device. The display area setting unit,
When the remaining amount of the battery is less than a threshold value, the display area is set narrow,
When the remaining battery level exceeds the threshold value, the display area is set wide.
The display device according to claim 1. Further comprising a backlight control unit for turning off the backlight of a region other than the display region on the display screen according to the setting of the display region setting unit,
The display device according to claim 1 or 2. The setting state is the position and size of the display area,
The display device according to any one of claims 1 to 3. The display control unit, the relative position of the drawing information with respect to the display area before the setting change and the relative size of the drawing information with respect to the display area,
Enlarging or reducing the drawing information so that the relative position of the drawing information with respect to the display area after the setting change and the relative size of the drawing information with respect to the display area are equal.
The display device according to any one of claims 1 to 4. In a display device driven by a battery,
In the display screen of the display device, a display area setting step for setting a display area according to the remaining amount of the battery,
A pointing position detecting step of detecting a pointing position with respect to the display area,
A designated position storage step of storing the setting state of the display area and the coordinates of the designated position in association with each other;
A drawing control step of drawing drawing information at the designated position,
When the setting of the display area is changed in the display area setting step, based on the changed setting state and the information stored in the pointing position storing step, before the setting of the display area is changed. A display control step of displaying the drawn drawing information by enlarging or reducing it;
How to display. For the computer that controls the display device driven by the battery,
In the display screen of the display device, a display area setting step for setting a display area according to the remaining amount of the battery,
A pointing position detecting step of detecting a pointing position with respect to the display area,
A designated position storing step of storing the setting state of the display area and the coordinates of the designated position in association with each other;
A drawing control step of drawing drawing information at the designated position,
When the setting of the display area is changed in the display area setting step, based on the changed setting state and the information stored in the pointing position storing step, before the setting of the display area is changed. A display control step of displaying the drawn drawing information by enlarging or reducing it;
A program to execute.

Images