JP2001022681A - Presentation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a presentation system with which presentation can be more smoothly performed by enabling communication processing adaptive to the state of load of a CPU on the side of a host device. SOLUTION: A master device 1 is provided with a discriminating means for discriminating the CPU load state of a host device 2 by inquiring the CPU load state of the host device 2 to the host device 2 when transmitting a presentation image to the host device 2 and an adaptive transmission control means for performing adaptive data transmission corresponding to the CPU load state of the host device 2 discriminated by the discriminating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a presentation device.

[0002]

2. Description of the Related Art Conventionally, a presentation system using a liquid crystal projector is well known. In such a presentation system, image data sent from the personal computer to the main body of the liquid crystal projector is sent to a liquid crystal panel, and an image displayed on the liquid crystal panel is enlarged and displayed on a screen.

Generally, when giving a presentation, a presenter gives an explanation of the presentation while operating a personal computer. Therefore, it is convenient for the presenter if it is possible to operate the personal computer at a place where the presentation image is easy to see. For this reason, it is convenient if the personal computer can be operated away from the display unit.

In the case of a presentation system using a liquid crystal projector, it is convenient if a personal computer can be arranged at a location distant from a screen as a display unit. In a presentation system using a liquid crystal projector, even when a personal computer is arranged at a position distant from a screen serving as a display unit, the main body of the liquid crystal projector can be arranged very close to the personal computer. Therefore, there is not much problem in connecting the personal computer and the main body of the liquid crystal projector with a connection line such as a cable.

Recently, a PDP (plasma display panel) display device having a thickness of about 10 cm, which can be mounted on a wall, has attracted attention as a flat display device. In a PDP display device mounted on a wall, a circuit such as a driving circuit is integrally incorporated, and the PDP display device is installed without a connection line or the like on the floor.

In a presentation system in which a presentation image created by a personal computer is displayed on such a PDP display device, if the personal computer is arranged at a position distant from the PDP display device, which is a display unit, the personal computer and the PDP display device can be relatively compared. There is a problem that it is inconvenient because it is necessary to connect with a long connection line.

[0007] Therefore, the present applicant provides a wireless LAN to a personal computer (master device) that provides a presentation image.
A transmitter is provided, and a wireless LAN receiver is provided on a PDP (host device) side for displaying a presentation image,
The image transmitted from the personal computer via the wireless LAN transmitter is received by the wireless LAN receiver, and the image is transmitted to the wireless LAN receiver.
A presentation device has been developed in which an image received by a receiver is displayed on a PDP.

However, in this presentation apparatus, regardless of the state of the CPU load on the personal computer and the state of the CPU load on the PDP,
Since the presentation image is displayed on both the DP side, there is a possibility that the CPU load on the personal computer side or PDP side becomes abnormally large. If the CPU load on the personal computer or PDP becomes abnormally large, communication processing and display processing will be delayed, which will hinder presentation.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a presentation apparatus which can perform communication processing adapted to the state of a load on a CPU of a host apparatus and can perform a presentation more smoothly. And

SUMMARY OF THE INVENTION It is an object of the present invention to provide a presentation device that enables a display process adapted to a load state of a CPU of a host device side to be performed on a host device side, thereby enabling a presentation to be performed more smoothly. I do.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a presentation device that enables a display process adapted to a state of a CPU load on a master device side on a master device side, thereby enabling a presentation to be performed more smoothly. .

[0012]

A first presentation device according to the present invention provides a presentation image, and comprises a master device having a wireless LAN transmitter for transmitting the presentation image, and a transmission from the master device. Wireless LAN receiver and wireless LAN for receiving received presentation image
In a presentation device including a host device having a PDP display for displaying a presentation image received by a receiver, a master device sends a CPU load state of the host device to the host device when transmitting a presentation image to the host device. A determination unit that determines the CPU load state of the host device by making an inquiry; and an adaptive transmission control unit that performs adaptive data transmission according to the CPU load state of the host device determined by the determination unit. Features.

As the adaptive transmission control means, for example,
When the CPU load state of the host device is high, transmission of the presentation image is interrupted. When the CPU load state of the host device is low, the presentation image is transmitted to the host device. Used.

As the adaptive transmission control means, for example,
When the CPU load state of the host device is the high load state, the presentation image is transmitted intermittently. When the CPU load state of the host device is the low load state,
The one that continuously transmits presentation images is used.

[0015] A second presentation device according to the present invention provides a presentation image, and a wireless LA for transmitting the presentation image.
A master device having N transmitters, and a host device having a wireless LAN receiver for receiving a presentation image transmitted from the master device and a PDP display for displaying the presentation image received by the wireless LAN receiver. In displaying the presentation image transmitted to the host device on the host device side, the master device inquires the host device about the CPU load status of the host device to determine the CPU load status of the host device. Means, a display mode determining means for determining a display mode according to the CPU load state of the host device determined by the determining means, and a display mode transmitting means for notifying the host device of the determined display mode. The trout In the display mode corresponding to the notified display mode by the apparatus, characterized by comprising a display control means for displaying the presentation image received from the host apparatus to the PDP display device.

As the display mode determining means, for example,
When the CPU load state of the host device is a high load state, the simple display mode for performing the display control ignoring the special display effect is determined as the display mode, and the CPU load state of the host device is in the low load state. In some cases, a device that determines a normal display mode as a display mode for performing display control with the special display effect enabled is used.

A third presentation device according to the present invention provides a presentation image, and a wireless LA for transmitting the presentation image.
A master device having N transmitters, and a host device having a wireless LAN receiver for receiving a presentation image transmitted from the master device and a PDP display for displaying the presentation image received by the wireless LAN receiver. In the presentation device, when the master device displays the presentation image transmitted to the host device on the master device side and displays the presentation image transmitted to the host device on the display device, the CPU load state of the master device is reduced. Determining means for determining whether or not the CPU load state of the master device is high, and stopping the display processing for displaying the presentation image transmitted to the host device on the display device of the master device; CPU load status is low In some cases, characterized by comprising display control means for executing a display process for displaying the presentation image sent to the host apparatus on a display of the master device side.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

The presentation device is an operation side device 1
(Hereinafter, referred to as a master device) and a PDP display device (hereinafter, referred to as a host device) 2.

The master device 1 includes a personal computer (PC) 10 such as a notebook personal computer for providing a presentation image, and a wireless modem unit (wireless LAN transmitter) 20 connected to a PC card interface unit 13 of the PC 10. Become. As is well known, the PC 10 includes a keyboard 11 and a liquid crystal display 12.
, A PC card interface unit 13, an image memory 14, and a control unit 15 including a CPU. The CPU in the control unit 15 is referred to as a master-side CPU.

The host device 2 includes a wireless modem unit (wireless LAN receiver) 31, a PDP display 32, and an image transmitted from the master device 1 which are compatible with the wireless modem unit (wireless LAN transmitter) 20 of the master device 1. Control unit 3 including image memory 33 for storing data and CPU
4 is provided. The CPU in the control unit 35 is referred to as a host-side CPU.

A presentation image to be transmitted to the host device 2 is stored in the image memory 14 of the master device 1. When the presentation image stored in the image memory 14 is transmitted from the master device 1 to the host device 2 and displayed on the host device 2, the operator specifies the presentation image to be transmitted, and then specifies the presentation image to be transmitted. Input a transmission command to. It is assumed that the operator inputs a transmission command each time a presentation image for one page is designated.

FIGS. 2 and 3 show a transmission processing procedure performed by the master CPU when a transmission command is input to the master device 1.

When a transmission command is input, a transmission image for one page specified by the operator is selected (step 1).

Then, a transmission permission / non-permission inquiry command is transmitted to the host device 2 (step 2). As described later, the host device 2 determines whether or not there is a free space in the image memory 33 when receiving this inquiry command. A non-permission command is transmitted to the master device 1. When transmitting the permission command, the host device 2 transmits the load state of the CPU (host-side CPU) in the control unit 34 to the master device 1.

If a non-permission command is received from the host device 2 (YES in step 3), a transmission error is displayed on the display 12 (step 4), and the current transmission processing is terminated. When the permission command is received from the host device 2 (YES in step 5), the process waits for the load status of the host CPU to be transmitted from the host device 2 (step 6).

When the load state of the host CPU is received from the host device 2 (YES in step 6), the host C
A transmission process adapted to the load state of the PU is performed. That is, if the load state of the host CPU is a high load state (step 7), the display unit 12 indicates that the host CPU is in the standby state.
(Step 8), the process returns to step 2, and the transmission permission / non-permission inquiry command is transmitted again.

If the load state of the host CPU is a medium load state (step 7), the one selected in step 1
The image data for the page is transmitted intermittently (at predetermined intervals little by little) to the host device 2 (step 9).

If the load state of the host CPU is a low load state (step 7), the one selected in step 1
The image data for the page is continuously transmitted to the host device 2 (step 10).

By step 9 or step 10,
When the transmission of the image data for one page is completed, an image display command is transmitted to the host device 2 (step 11). When receiving this image display command, the host device 2 transmits the load state of the host-side CPU to the master device 1 as described later.

When the load state of the host CPU is received from the host apparatus 2 (YES in step 12), the image display mode on the host apparatus 2 side is determined based on the load state of the host CPU. That is, the received host-side CP
If the load state of U is a high load state (step 1
3) After displaying the standby state on the display 12 (step 14), the process returns to step 11 and transmits the image display command again.

If the load state of the host CPU is a medium load state (step 13), a display mode designation command indicating that the display mode is the simple display mode is transmitted to the host device 2 (step 15). If the received load state of the host CPU is a low load state (step 13), a display mode designation command indicating that the display mode is the normal display mode is transmitted to the host device 2 (step 16).

In the host device, when the normal display mode is designated, display control processing for enabling special display effects such as fade-in and fade-out is performed, and when the simple display mode is designated, the special display mode is performed. A display control process that ignores the display effect is performed.

When the display mode designation command is transmitted in step 15 or step 16, the master side CP
It is determined whether or not U is overloaded (step 17). If the master CPU is not in an overloaded state, the image of one page transmitted to the host device 2 in the above step 9 or 10 is displayed on the display 12 (step 18). Then, the current transmission processing ends.

In step 17, the master-side CP
If U is in an overloaded state, the current transmission processing is terminated without displaying the image of one page transmitted to the host device 2 in step 9 or 10 on the display unit 12.

FIGS. 4 and 5 show a reception processing procedure performed by the host-side CPU when the host device 2 receives a transmission permission / non-permission inquiry command.

When receiving the transmission permission / inhibition inquiry command from the master device 1, it is determined whether or not the image memory 33 has a free space (step 41). If there is no free space in the image memory 33, a non-permission command is transmitted to the master device 1 (step 42), and the current reception processing ends.

If there is free space in the image memory 33, a permission command is transmitted to the master device 1 (step 43).
Then, the load state of the host CPU is determined (step 44), and the determination result is transmitted (steps 45, 4).
6, 47).

If the host CPU has transmitted a high load state (step 45), the current reception processing is terminated. If the host CPU has transmitted a message indicating that the medium load state or the low load state is present (steps 46 and 47),
Thereafter, the image data sent from the master device 1 is stored in the image memory 33 (step 48).

Then, it waits for an image display command to be sent from the master device 1 (step 49). When the image display command is received (YES in step 49), the load state of the host CPU is determined (step 51), and the determination result is transmitted (steps 52, 53, 54).

When the host CPU has transmitted a high load state (step 52), the flow returns to step 49 to be in a state of waiting for reception of an image display command.

If the host CPU has transmitted a message indicating that it is in a medium load state or a low load state (steps 53 and 5).
4) Wait for a display mode designation command from the master device 1 (step 55).

When a display mode designation command is received from master device 1 (YES in step 55), image display control processing according to the display mode (simple display mode or normal display mode) designated by the received display mode designation command. Is performed, the image for one page stored in step 48 is displayed on the display 33 (step 56). Then, the current reception processing ends.

In the above embodiment, the load state of the host CPU is classified into three levels of high, medium and low. However, the load state of the host CPU is classified into two levels of high and low. It may be.

The load state of the host CPU is set to 2 for high and low.
An example of the process of step 6 in FIG. 2 in the case of classification into stages will be described.

For example, if it is determined in step 7 of FIG. 2 that the load state of the host CPU is high, the process proceeds to step 8 (standby), and in step 7 of FIG. If it is determined that the load state is a low load state, the process proceeds to step 10 (continuous transmission of image data).

Alternatively, if it is determined in step 7 of FIG. 2 that the load state of the host CPU is a high load state, the process proceeds to step 9 (intermittent transmission of image data). If it is determined that the load state of the host CPU is a low load state, the process proceeds to step 10 (continuous transmission of image data).

The load state of the host CPU is set to 2
An example of the process of step 13 in FIG. 3 in the case of classifying into stages will be described.

For example, in step 13 of FIG.
When it is determined that the load state of the host CPU is the high load state, the process proceeds to step 14 (standby), and in step 13 of FIG. 3, it is determined that the load state of the host CPU is the low load state. In this case, the process proceeds to step 16 (transmission of a display mode designation command indicating the normal display mode).

Alternatively, in step 13 of FIG.
If it is determined that the load state of the host CPU is a high load state, the process proceeds to step 15 (transmission of a display mode designation command indicating the simple display mode), and in step 13 of FIG. If it is determined that the state is the low load state, the process proceeds to step 16 (transmission of a display mode designation command indicating the normal display mode).

[0051]

According to the present invention, the CP on the host device side can be used.
Communication processing adapted to the state of the load of U becomes possible, and a presentation can be performed more smoothly.

According to the present invention, the host device can perform a display process adapted to the state of the load on the CPU of the host device, and the presentation can be performed more smoothly.

According to the present invention, the master device can perform a display process adapted to the state of the CPU load of the master device, and the presentation can be performed more smoothly.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a presentation device.

FIG. 2 is a flowchart illustrating a processing procedure of a master CPU.

FIG. 3 is a flowchart illustrating a processing procedure of a master CPU.

FIG. 4 is a flowchart illustrating a processing procedure of a host-side CPU.

FIG. 5 is a flowchart illustrating a processing procedure of a host CPU.

[Explanation of symbols]

 Reference Signs List 1 master device 2 host device 10 PC 12 display 13 PC card interface unit 14 image memory 15 control unit 20 wireless modem unit (wireless LAN transmitter) 31 wireless modem unit (wireless LAN receiver) 32 display unit 33 image memory 34 control Department

Claims (6)

[Claims] 1. A master device having a wireless LAN transmitter for transmitting a presentation image, and a wireless LAN receiver for receiving a presentation image transmitted from the master device. Displaying presentation image received by wireless LAN receiver and wireless LAN receiver
In a presentation device provided with a host device having a P display, when transmitting a presentation image to the host device, the master device inquires of the host device about the CPU load state of the host device, and thereby transmits the presentation image to the host device.
A presentation apparatus comprising: a determination unit that determines a U load state; and an adaptive transmission control unit that performs adaptive data transmission according to a CPU load state of a host device determined by the determination unit. 2. The adaptive transmission control means according to claim 1, wherein
When the PU load state is a high load state, transmission of the presentation image is interrupted, and when the CPU load state of the host device is a low load state, the presentation image is transmitted to the host device. The presentation device according to claim 1, wherein 3. The adaptive transmission control means according to claim 1, further comprising:
When the PU load state is a high load state, the presentation image is transmitted intermittently and the CPU of the host device is transmitted.
The presentation device according to claim 1, wherein when the load state is a low load state, the presentation image is continuously transmitted. 4. A master apparatus having a wireless LAN transmitter for transmitting a presentation image, and a wireless LAN receiver for receiving a presentation image transmitted from the master apparatus. Displaying presentation image received by wireless LAN receiver and wireless LAN receiver
In a presentation device provided with a host device having a P display, the master device queries the host device for the CPU load state of the host device when displaying the presentation image transmitted to the host device on the host device side. Determining means for determining the CPU load state of the device, and C of the host device determined by the determining means
A display mode determining unit that determines a display mode according to the PU load state; and a display mode transmitting unit that notifies the host device of the determined display mode. The host device responds to the display mode notified by the master device. A display device for displaying a presentation image received from the host device on the PDP display device in the display mode. 5. A display mode determining means, comprising:
When the PU load state is the high load state, the simple display mode for performing the display control ignoring the special display effect is determined as the display mode, and when the CPU load state of the host device is the low load state. 5. The presentation device according to claim 4, wherein the control unit determines a normal display mode for performing a display control in which a special display effect is enabled as a display mode. 6. A master device having a wireless LAN transmitter for transmitting a presentation image and providing a presentation image, and a wireless LAN receiver for receiving a presentation image transmitted from the master device. Displaying presentation image received by wireless LAN receiver and wireless LAN receiver
In a presentation device including a host device having a P display, the master device displays the presentation image transmitted to the host device on the master device side, and displays the presentation image transmitted to the host device on the display device. At this time, the determination means for determining the CPU load state of the master device, and when the CPU load state of the master device is in a high load state, the presentation image transmitted to the host device is displayed on the display device of the master device. Display control means for stopping display processing of the master device and executing display processing for displaying a presentation image transmitted to the host device on a display device of the master device when the CPU load state of the master device is a low load state A presentation device comprising: