JPH04280294A - Pointer indicating device - Google Patents

Abstract

PURPOSE:To display a plurality of pointers on a screen and enable respective pointers to be independently operated respectively. CONSTITUTION:Pointer generating circuits 74a, 74b, 74c generate pointers 73a, 73b, 73c, respectively, in one to one correspondence. For example, in the case when an order code is given from a remote controller 10a, only the pointer generating circuit 74a receives it and moves the corresponding pointer 73a. The pointers 73a and 73c don't move and remain fixed, to the right and lower point of a screen, as an initial state, since the pointer generating circuits 74b and 74c don't receive the order code from the remote controller 10a.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The present invention relates to a position pointer cursor (hereinafter simply referred to as a pointer) for pointing to a specific position within a displayed image when image information is reproduced and displayed in an image display device. The present invention relates to a pointer display device that displays a pointer.

0002

2. Description of the Related Art Conventionally, there has been an image display device that records digital image data captured by a camera, image scanner, etc. in an external storage device such as an optical disk, and searches and displays the data as needed. In such a device,
If you need to point to a specific point on the screen, e.g.
As described in Japanese Unexamined Patent Publication No. 62-152076, a pointer that can move freely on the screen is displayed and can be operated and given instructions using an input device such as a keyboard or mouse. .

0003

[Problem to be Solved by the Invention] By the way, the above-mentioned image display device is not only used as a display device, but also has an application that sequentially displays images in a predetermined order at a recital. , when used as a so-called presentation system, or when holding a conference by exchanging images with the destination through a transmission path, so-called TV
It may be used as a conference system.

[0004] In such cases, for example, multiple people may exchange opinions on one screen (image), so if there is only one pointer to point to a specific point on the screen, This single pointer moves around the screen more than necessary, which is very inconvenient for people participating in the meeting and for the person operating the pointer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pointer display device that solves the above-mentioned problems of the conventional technology and can display a plurality of pointers on a screen and operate each pointer independently. It's about doing.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the present invention, a plurality of pointers are arranged one to one, respectively.
A plurality of pointer generation means are generated in response to the above, and are displayed on the screen, and move corresponding pointers on the screen in response to input operation signals, respectively, and a plurality of pointers, respectively, on a one-to-one basis. In order to move the corresponding pointer on the screen, a plurality of operation signal generation means each generate an operation signal, and an operation signal generation means generates an operation signal generated by the plurality of operation signal generation means, respectively. The pointer generating means is provided with an input means for inputting an input to the pointer generating means corresponding to the same pointer as the corresponding pointer of the means.

[0007]

[Operation] The plurality of pointer generation means generate a plurality of pointers in one-to-one correspondence and display them on the screen. The plurality of operation signal generation means also have a one-to-one correspondence with the plurality of pointers, and each generates an operation signal to move the corresponding pointer on the screen. The input means inputs the operation signal generated by the operation signal generation means to the pointer generation means corresponding to the same pointer as the corresponding pointer of the operation signal generation means. Therefore, a plurality of pointers can be displayed on the screen and each pointer can be operated independently. Therefore, in presentations, TV conferences, etc. in which a plurality of people participate, each person can have an operation signal generating means and proceed using a dedicated pointer, so that smooth progress can be expected.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an image display device equipped with a pointer display device as a first embodiment of the present invention. This image display device is used as a presentation system for making presentations to a plurality of people at conferences and the like.

In FIG. 1, 1 is a CPU that controls and manages the system, 2 is a main memory in which the CPU 1 temporarily stores data, etc., and 3 is a ROM that stores software for operating the system. , 4 is an optical disk device for storing images; 5 is a system bus for transferring control commands from CPU 1, image data, etc. between each device; 6 is a compressor for compressing image data during recording and decompressing it during playback. An expansion circuit, 7 a frame memory for storing image data for display, 8 a display for displaying the image in the frame memory 7, 9 a remote control device held by the operator (hereinafter, a remote control is used as a specific example). Receiving circuits 10a, 10b, 10c that receive data sent by (explained) and convert it into a code that can be analyzed by the CPU 1
is a remote control used by an operator to give commands to the present presentation system, and here the case where three people give commands to the present system is described.

[0010] In reality, there is a process in which image data to be used as materials for a presentation is created in advance and recorded on a recording medium such as an optical disc. It is assumed that has already been recorded on the optical disc, which is a recording medium. Therefore, the block diagram shown in FIG. 1 is a so-called reproduction-only system in which image data recorded at the time of presentation is sequentially reproduced using a remote control.

FIG. 2 is a block diagram showing an example of the structure of the receiving circuit 9 in FIG. 1. Components having the same functions as those in FIG. 1 are given the same reference numerals. In FIG. 2, reference numeral 91 denotes a light receiving circuit for receiving an infrared signal transmitted when the remote controllers 10a, 10b, 10c issue a command; 92a, 92b,
92c transmits infrared signal commands transmitted from the remote controllers 10a, 10b, and 10c to the CP of the presentation system.
A signal conversion circuit that converts into an instruction code that can be interpreted by U1, 92a is for the remote controller 10a, and 92b is for the remote controller 10b.
Reference numeral 92c is a dedicated signal conversion circuit for the remote controller 10c, which responds only to the command codes transmitted by each remote controller 10c. This can be easily achieved by configuring a decoder to decode only a specific instruction code using a general-purpose IC or the like. 93 is a signal conversion circuit 92a
, 92b and 92c, and 94 is a bus for outputting the instruction code stored in the command register 93 onto the system bus 5 in accordance with a request from the CPU 1. This is an interface (I/F) circuit.

FIG. 3 is a block diagram showing an example of the structure of the frame memory 7 in FIG. 1. In this figure as well, like in FIG. 2, parts having the same functions as in FIG. 1 are given the same symbols. In FIG. 3, reference numeral 71 is an image memory for storing image data recorded on an optical disk, and in order to make it easier to understand, a picture of what is actually displayed on the screen has been added to this figure. Reference numeral 72 denotes a pointer memory for displaying a pointer that can be moved by the remote controller, and pointers 73a, 73b, and 73c corresponding to each remote controller are displayed on the screen as shown in the figure. 74a, 74b, 74c are pointer generation circuits for respectively displaying and moving the pointers 73a, 73b, 73c on the pointer memory 72, and receiving the outputs of the signal conversion circuits 92a, 92b, 92c, This is a circuit for moving pointers 73a, 73b, and 73c.

FIG. 4 shows an example of the configuration of this pointer generation circuit. This shows the configuration of the pointer generation circuit 74a corresponding to the remote controller 10a.
b, 74c may have a similar configuration.

In FIG. 4, 741 is an address calculation circuit, which calculates the address of the pointer memory 72 in order to display the pointer 73a based on a signal from the remote controller 10a inputted from the input terminal 77a. This can be achieved by using an adder circuit or a counter. 742 is a ROM (read-only memory) in which data on the shape and color of the pointer 73a is recorded in advance. 743
is a circuit that writes pointer data read from the ROM 742 into the pointer memory 72 according to the address input from the address calculation circuit 741.

Further, in FIG. 3, reference numeral 75 denotes a synthesis circuit for synthesizing and displaying the image in the image memory 71 and the pointer image in the pointer memory 72. 76 is an output terminal for outputting the combined image to the display 8 shown in FIG.

Next, the operation of this presentation system will be explained. Here, a case will be described in which a presenter makes a presentation to two other people. It is assumed that the presenter is the first operator and holds the remote control 10a. The remaining two people are in a position to ask questions and each have one remote control 10b and 10c, and serve as the second operator and third operator during the question and answer session. Each of these remote controllers is capable of generating and transmitting its own signal code, and is designed not to transmit the same command code to each other.

[0017] In this presentation system, a data string (
In the following, images can be displayed according to a scenario (hereinafter referred to as a scenario), and this scenario is created at the time of image data creation and is stored on an optical disc.

[0018] At the time of presentation, the first operator first starts up the system. The CPU 1 interprets and executes the contents of the ROM 3, enters an initial state, and shifts to a state of waiting for command input from the remote controller 10a. The first operator selects a scenario using the remote controller 10a and instructs its execution. Commands output from the remote controller 10a are received by the receiving circuit 9 and taken into the CPU 1 through the system bus 5.

The situation at this time will be explained using FIG. 12. A command code emitted by modulating infrared light from the remote controller 10a is input to the light receiving circuit 91, demodulated, and output as a command code. This instruction code is input to the signal conversion circuits 92a, 92b, and 92c, but since it is issued by the remote control 10a, only the signal conversion circuit 92a interprets (that is, decodes) the contents.
Then, the instruction is converted into an executable instruction by the CPU 1, and the conversion result is input to the command register 93. Even if the output of the light receiving circuit 91 is inputted to 92b, 92c, it is not interpreted as an instruction code, and no valid signal is outputted from the signal conversion circuits 92b, 92c. When a plurality of commands from the remote controller 10a are input in succession, the command codes are stored in the command register 93 in the order in which they are input.

[0020] In the standby state, the CPU 1 accesses the I/F circuit 94 of the receiving circuit 9, fetches instructions from the oldest one stored in the command register 93 through the system bus 5, and starts execution. That is, here, the optical disk device 4 is operated, the scenario written on the optical disk is copied to the main memory 2, and the first piece of image data written in the scenario is read from the optical disk and transferred to the frame memory 7. .

At this time, if the image is a compressed image, the data read out from the optical disk device 4 is once transferred to the companding circuit 6 and returned to the original image through decompression processing, and then stored in the frame memory 7. will be forwarded to. The image data stored in the frame memory 7 is displayed on the display 8. Thereafter, the CPU 1 enters a standby state and continues to display the first image until the next command is input from the remote controller 10a.

The presenter, ie, the first operator, moves the pointer 73a using the remote control 10a to point to a desired point on the screen and gives an explanation. This operation of the pointer 73a is also performed by interpreting only the command code of the remote controller 10a within the receiving circuit 9, as in the case of starting execution.

The pointer display on the frame memory 7 at this time will be explained using FIG. 3. As shown in FIG. 3, pointer generation circuits 74a, 74b, 74c generate pointers, and signal conversion circuits 92a, 92b, 92c
Pointers 73a, 73b,
73c is moved. Remote control 10a
Pointer generation circuit 7
4a controls pointer 73a. Pointer 73b, 7
3c does not move because the pointer generation circuits 74b and 74c do not receive any commands, and remains fixed at the bottom right of the screen as an initial state, for example.

After the explanation is completed, the first operator operates the remote control 10a to display the next image, and again issues a command to the CPU 1 through the receiving circuit 9. The CPU 1 refers to the scenario on the main memory 2, reads the image data corresponding to the next page from the optical disk device 4, transfers it to the frame memory 7, displays it, and enters a standby state. By repeating the above operations, the first operator makes a presentation.

Next, when conducting a question and answer session, the second and third operators who are the questioners use the remote controllers 10b and 10c, respectively.
The pointers 73b and 73c are operated using the . That is, in FIG. 2, a command issued from the remote controller 10b is input to the light receiving circuit 91, and then is input to the signal converting circuit 92a.
, 92b, 92c. However, in this case, since the instruction code is issued by the remote control 10b, it is interpreted only by the signal conversion circuit 92b, and the instruction code is outputted to the pointer generation circuit 74b via the output terminal 95b. At this time, nothing is output from the signal conversion circuits 92a and 92c. In FIG. 3, the pointer generation circuit 74b controls the pointer 73b and moves it on the screen as operated by the second operator. In the case of the third operator, the third operator can use the remote control 10c to operate the pointer 73c on the screen and specify a specific point on the screen.

As described above, according to this embodiment, multiple people can operate their own pointers, so a situation where a single pointer moves back and forth on the screen does not occur, which makes presentations and TV conferences easier. You can do this if things go smoothly.

Now, in the above explanation, the pointer data recorded in the ROM 742 of the pointer generation circuits 74a, 74b, and 74c are all the same. Therefore, as shown in FIG. 3, the three pointers displayed on the screen have the same shape and the same color, making it difficult for the operator to identify his own pointer. Therefore, in order to solve this problem, pointer generation circuits 74a, 74b, 74c
Pointer data having different shapes and colors is recorded in the ROM 742. This will be explained below using FIG. 5.

FIG. 5 is an explanatory diagram showing another example of three pointers displayed on the screen. That is, the ROM 742 of the pointer generation circuit 74a shown in FIG.
Pointer data that displays the figure shown in FIG. 5(a) is recorded as the pointer 73a for 0a, and the pointer data as shown in FIG. Pointer data for displaying a figure is recorded, and pointer data for displaying a figure shown in FIG. 5(c) is recorded in the ROM of the pointer generation circuit 74c as a pointer 73c for the remote controller 10c. Make sure to keep it. thus,
By providing pointer shapes or colors exclusively for the pointers 73a, 73b, and 73c, the pointers can be easily identified.

In addition to the above-described method, it is also possible to use a RAM (Random Access Memory) that can be erased and written in place of the RO of the pointer generation circuits 74a, 74b, and 74c. This will be explained below using FIG. 6. FIG. 6 is a block diagram showing another example of the configuration of the pointer generation circuit in FIG. 3. In FIG. 6, 744 is a RAM used instead of the ROM 742 shown in FIG.
is an interface circuit for exchanging pointer data between the RAM 744 and the system bus 5.

In this configuration example, the CPU 1 writes desired pointer data in advance to the RAM 744 via the system bus 5 and the interface circuit 745 and stores it therein. This allows the shape to be adjusted depending on the case.
Color pointers can be displayed freely. Therefore,
It becomes easier to identify pointers, and effective presentations can be made.

Furthermore, in the above explanation, the remote controllers 10a,
10b and 10c each generate their own instruction code,
However, since the same command code is not sent to each other, there is an inconvenience that a specific pointer can only be moved using a specific remote control. In order to solve this problem, each of the remote controllers 10a, 10b, and 10c is provided with a code selection switch so that any remote controller can operate the desired pointer. This will be explained below using FIG. 7.

FIG. 7 is a block diagram showing another example of the configuration of the remote control 10a in FIG. 1. Figure 7 shows the remote control 10a.
The configuration of remote controllers 10b and 10c is shown.
The configuration is similar for .

In FIG. 7, reference numeral 101 denotes a remote control input circuit, which is generally composed of matrix-shaped push buttons. In response to the output result of input circuit 101, code selection and generation circuit 102 selects and generates an instruction code. For this, a ROM is used, and the input circuit 101
The instruction code data may be output by using the output as the ROM address.

Here, the code selection generation circuit 102 has the following:
All command codes generated by the three remote controllers mentioned above are stored. The code selection switch 103 and the decoder 10 select which of these three types of codes to select.
7 allows this to be done. The code selection switch 103 selects the instruction code of the remote controller 10a when the terminal 104 is selected, the instruction code of the remote controller 10c when the terminal 105 is selected, and the instruction code of the remote controller 10c when the terminal 106 is selected. As selected in generation circuit 102,
The configuration is such that a decoder 107 switches the ROM address.

Therefore, with this configuration, a desired pointer can be operated simply by changing the code selection switch 103, thereby eliminating the inconvenience of being able to move a specific pointer only with a specific remote controller.

Furthermore, in the above explanation, if two or more operators operate at the same time, two or more pointers will move on the screen at the same time, causing confusion for the operators and people attending the meeting. There was a problem of giving Therefore, in order to solve this problem, a new circuit as shown in FIG. 8 was added to the frame memory 7 shown in FIG. 3.

FIG. 8 is a block diagram showing the main parts of another example of the structure of the frame memory 7 in FIG. 1. That is, the configuration example shown in FIG. 8 is one in which the circuit described below is provided in the path from the input terminals 77a, 77b, 77c to the pointer generation circuits 74a, 74b, 74c in the frame memory 7 shown in FIG. It is.

In FIG. 8, components having the same functions as those in FIG. 3 are given the same symbols. 11a, 11b, and 11c are switch circuits, which are closed when the control signal is at a high level.
When it becomes low level, it opens and input terminals a, 77b, 77c
It is designed to block signals input from the 12
a, 12b, 12c are pointer generation circuits 74a, 74b
, 74c, which outputs a high level signal when no instruction code is input, and outputs a low level signal when input is detected. Since the instruction code is usually a pulse train, this can be realized by using, for example, a mono-multivibrator so that when a pulse is input, it can be held at a low level for a certain period of time.

13a is an AND circuit whose inputs are the output signals of the input detection circuits 12b and 12c, 13b is the output signal of the input detection circuits 12a and 12c, and 13c is the output signal of the input detection circuits 12a and 12b. , the respective outputs are input to switch circuits 11a, 11b, and 11c. 14a, 14b, 14c are pointer generation circuits 74a
, 74b, 74c are connected to the pointer memory 72 in FIG. 3, and are used to write a pointer into the memory.

In this configuration example, for example, the remote control 10
A case where b is operated will be explained. First, if the remote controllers 10a, 10b, 10c are not operated,
Since the instruction code is not input to the input detection circuits 12a, 12b, and 12c, all output signals are at high level.
Switch circuits 11a, 11b, and 11c are all closed.

[0041] First, when the remote control 10b is operated,
An instruction code is input to the input terminal 77b. The instruction code is input to the input detection circuit 12b and the pointer generation circuit 74b, and the input detection circuit 12b detects that the signal is input and sets the output signal to a low level. In response to this signal, the output signals of the AND circuits 13a, 13c become low level, and the switch circuits 11a, 11c are opened, so that even if an instruction code is inputted to the input terminals 77a, 77c thereafter, it will not be accepted.

After that, when the operation with the remote controller 10b is completed, the input detection circuit 12b sets its output signal to high level again and closes the switch circuits 11a and 11c, so that commands from the remote controllers 10a and 10c can be accepted. Become.

As described above, according to this configuration example, 2
Since more than one pointer does not move on the screen at the same time, there is an advantage that the operator and the people attending the meeting will not be confused.

Furthermore, in the above explanation, when the operator is operating one pointer, if another pointer is on the screen, it may become a nuisance or cause an annoyance. Therefore, in order to solve this problem, a new circuit as shown in FIG. 9 was added to the frame memory 7 shown in FIG. 3.

FIG. 9 is a block diagram showing the main parts of another example of the structure of the frame memory 7 in FIG. 1. In FIG. That is, in the configuration example shown in FIG. 9, in the frame memory 7 shown in FIG. 3, the circuits other than those shown in FIG. , holding circuits 15a, 15b, and 15c are provided.

Here, the holding circuits 15a, 15b, 15c
inputs the outputs of the input detection circuits 12a, 12b, 12c and the outputs of the logic circuits 13a, 13b, 13c. The holding circuit 15a holds the output level of the input detection circuit 12a until the output of the other input detection circuits 12b and 12c, that is, the output of the AND 13a, is input. Similarly, the output levels of the input detection circuits 12b and 12c are held. For example, flip-flop circuits may be used for the holding circuits 15a, 15b, 15c, and the outputs of the input detection circuits 12a, 12b, 12c are used as clock inputs, and the outputs of AND circuits 13a, 13b, 13c are used as reset inputs. This can be achieved by doing this. And the holding circuits 15a, 1
The outputs of 5b and 15c are output from pointer generation circuits 74a and 74.
b, 74c.

Pointer generation circuits 74a, 74b, 74c
Basically, the configuration is the same as that shown in FIG. The ROM 742 stores two types of data: data indicating the shape and color of the normal display pointer, and pointer data that can be displayed in a smaller size so that it is not noticeable on the screen when another pointer is being operated. Types of pointer data are stored. Then, the output signals of the holding circuits 15a, 15b, and 15c described above are input as address signals, and by switching the addresses,
For example, when the level is low, the former pointer is read, and when the level is high, the latter pointer is read.

First, in the initial state, three holding circuits 15
Since pointer generation circuits 74a, 74b, and 74c are outputting high-level signals, pointer generation circuits 74a, 74b, and 74c display small pointers on the screen. Next, remote control 1
When 0a is operated, the instruction code is input to the input detection circuit 12a.
input, and the normal high level output becomes low level. The holding circuit 15a receives the output of the input detection circuit 12a, outputs a low level signal, and outputs a low level signal to the pointer generation circuit 7.
Enter in 4a. The pointer generation circuit 74a then switches to a normal size pointer display to display the pointer to make it easier to see.

When the operation of the remote controller 10a is completed, the output of the input detection circuit 12a becomes high level again, but the output of the holding circuit 15a remains at low level, so the pointer remains at its normal size. . Next, when the remote control 10b is operated, the instruction code is input to the input detection circuit 12b, and the output signal of the holding circuit 15b changes from high level to low level, just as in the case where the remote control 10a is operated. At this time, input detection circuit 1
Since the output of 2b becomes low level, as a result, the output of AND circuit 13a changes from high level to low level,
This signal is input to the pointer generation circuit 74a, the output signal is reset, and the low level output is changed to the high level output for the first time. Therefore, at the same time that the pointer on the remote controller 10b becomes the normal size, the pointer on the remote controller 10a becomes smaller.

Therefore, according to this configuration example, the pointer becomes the normal size only when the operator is operating the pointer, and the pointers of other operators are displayed small, so that they do not get in the way on the screen. You can prevent this from happening. The embodiments of the present invention have been described above, and the input terminals 77a, 7 in FIGS. 3, 4, 6, 8, and 9
For circuits after 7b and 77c, instead of dedicated circuits, for example, a microcontroller is used exclusively for pointers, or a C
Needless to say, by using PU1, everything can be realized by software.

[0051]

According to the present invention, a plurality of pointers can be displayed on the screen and each pointer can be operated independently. Therefore, in presentations or TV conferences where multiple people participate, each person can proceed while using their own pointer.
We can expect smooth progress. In addition, even if multiple pointers are displayed, each pointer can have a different shape or color, making it easier to identify each pointer.Also, if it is not needed during operation, it can be made less noticeable on the screen. It doesn't get in the way or bother you from above.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an image display device equipped with a pointer display device as a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of the receiving circuit 9 in FIG. 1.

FIG. 3 is a block diagram showing an example of the configuration of the frame memory 7 in FIG. 1;

4 is a block diagram showing an example of a configuration of a pointer generation circuit 74a in FIG. 3. FIG.

FIG. 5 is an explanatory diagram showing another example of three pointers displayed on the screen.

6 is a block diagram showing another configuration example of the pointer generation circuit 74a in FIG. 3. FIG.

7 is a block diagram showing another configuration example of the remote controller 10a in FIG. 1. FIG.

8 is a block diagram showing main parts of another example of the configuration of the frame memory 7 in FIG. 1. FIG.

9 is a block diagram showing the main parts of another configuration example of the frame memory 7 in FIG. 1. FIG.

[Explanation of symbols]

7... Frame memory, 9... Receiving circuit, 10a, 10b,
10c...Remote control, 11a, 11b, 11c...Switch, 12a, 12b, 12c...Input detection circuit, 13a, 1
3b, 13c...AND circuit, 15a, 15b, 15c...
Holding circuit, 72... Pointer memory, 74a, 74b,
74c...Pointer generation circuit, 91...Light receiving circuit, 92a,
92b, 92c...Signal conversion circuit, 102...Code selection generation circuit, 103...Code selection switch, 107...Decoder.

Claims (5)

[Claims] 1. An image display device capable of displaying a plurality of pointers, each pointing to a point on the screen, on a screen on which a desired image is displayed, superimposed on the image. a plurality of pointer generating means that are generated in a one-to-one correspondence, are displayed on the screen, and each moves a corresponding pointer on the screen in response to an input operation signal; a plurality of operation signal generation means each generating the operation signal in a one-to-one correspondence with a pointer and each generating the operation signal in order to move the corresponding pointer on the screen; input means for inputting the operation signal into the pointer generation means corresponding to the same pointer as the corresponding pointer of the operation signal generation means that generated the operation signal, and inputting the plurality of pointers independently on the screen. A pointer display device characterized in that the pointer can be moved. 2. An image display device capable of displaying, on a screen on which a desired image is displayed, a plurality of pointers each pointing to a point on the screen, superimposed on the image; a plurality of pointer generating means that are generated in a one-to-one correspondence, are displayed on the screen, and each moves a corresponding pointer on the screen in response to an input operation signal; one or more operation signal generating means for generating the operation signal to select a specified pointer from among the pointers and move the selected pointer on the screen;
input means for inputting the operation signal generated by the operation signal generation means to a pointer generation means corresponding to the same pointer as the pointer selected by the operation signal generation means;
A pointer display device comprising: a plurality of pointers that can be independently moved on the screen. 3. The pointer display device according to claim 1, wherein the plurality of pointer generating means generate pointers having different colors or shapes from each other as the generated pointers, and display the generated pointers on the screen. A pointer display device characterized in that the plurality of pointers can be distinguished from each other on the screen. 4. The pointer display device according to claim 1, 2 or 3, further comprising: input detection means for detecting input of the operation signal to a plurality of the pointer generation means; and a result of detection by the input detection means; When the operation signal is input from the input means to any one pointer generation means among the plurality of pointer generation means, inputting the operation signal from the input means to another pointer generation means. A pointer display device comprising: an input prohibition means for prohibiting input from the screen, so that two or more of the plurality of pointers cannot be moved on the screen at the same time. 5. The pointer display device according to claim 1, 2 or 3, further comprising input detection means for detecting the input of the operation signal to a plurality of the pointer generation means, a result of detection by the input detection means, When the operation signal is input from the input means to any one pointer generation means among the plurality of pointer generation means, the other pointer generation means are controlled so that the pointer generation means generates a signal. 1. A pointer display device comprising: control means for preventing the generation of a pointer to be generated or for changing the color or shape of a generated pointer.