JP2000222163A - Data display system and data display control method in data display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the part between an information processor such as a personal computer and a data display device such as a projector wireless, to efficiently and reliably transfer data to be displayed to a data display device side and to perform networking further. SOLUTION: The personal computer 1 is provided with a radio communication module part 11 for enabling data communication with other equipment by radio waves and the data to be displayed are transmitted as a file by the radio communication module part 11. The projector 2 is similarly provided with the radio communication module part 21 as well. Also, the projector 2 is provided with a data preservation means for preserving the file to be displayed sent from the personal computer 1, a display data processing means which is provided with a viewer function corresponding to the type of the file to be displayed preserved in the data preservation means and analyzes the type of the file activating the viewer function suited to it and prepares display data and a display means for displaying the display data prepared by the display data processing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data display system and a data display system capable of transmitting and receiving signals between an information processing device such as a personal computer (hereinafter referred to as a personal computer) and a data display device such as a projector by wireless communication. In the data display control method.

[0002]

2. Description of the Related Art Recently, at a conference or a lecture, it has been common practice to explain necessary data on a screen while projecting data stored in a personal computer using a projector. .

In this case, the personal computer and the projector are connected by a cable, and data in the personal computer is transmitted to the projector via the cable. For this reason, there is always a connection cable on the spot, which is not aesthetically pleasing and there are many problems in usability.

[0004] To cope with this, it has been realized to wirelessly transmit and receive signals between a personal computer and a projector. For example, there is a display system for transmitting data existing in a personal computer to a projector by infrared communication (Japanese Patent Laid-Open No. Hei 10-145796). According to this, the cable for connecting the personal computer and the projector can be unnecessary.

[0005]

However, there are various problems with this infrared data transmission. First,
Infrared communication has the problem that the distance between the personal computer, which is the source of information, and the projector cannot be increased due to the short range of information and the low communication speed.It is extremely difficult to use in large venues. Become.

[0006] Further, since infrared communication is communication using light, there is a problem in that if there is an obstacle that blocks light, data transmission will be greatly hindered, and the light will be affected by other light such as sunlight. There is also.

[0007] In particular, recently, a person giving a presentation has his / her personal computer at hand, displays necessary data on a screen while operating the personal computer, and explains the displayed contents. I have. In this case, if the venue is large, the distance between the personal computer and the projector may be long. In such a situation, there is a problem in information transmission by infrared communication.

[0008] Recently, networking of information has been advanced. For example, suppose that a meeting is held by a large number of attendees at a certain venue,
One of the components of wireless networking is to wirelessly network notebook personal computers that are individually owned by a large number of people who attend the conference.
It is also conceivable to make one. In this way, by networking each device present in the venue, the data of each attendee can be transferred to other attendees' personal computers by wireless communication and downloaded, or It is also possible for each participant to freely transmit their own data to one projector and project the data on the screen, thereby enabling an extremely efficient conference.

However, in order to construct a system in which a large number of personal computers and projectors are networked as described above and data can be exchanged between the personal computers and data can be transferred from any personal computer to any projector, It is considered difficult to realize the data communication by infrared communication.

In the present invention, data transmission and reception between an information processing device (such as a personal computer) as a data transmission source and a data display device (such as a projector) capable of displaying the data on a screen or the like can be performed by radio communication using radio waves. To realize a data display system and a data display control method in the data display system capable of efficiently holding a conference in a large venue by easily enabling wireless networking. And

[0011]

In order to achieve the above object, a data display system according to the present invention comprises an information processing apparatus for transmitting data to be displayed, and a data to be displayed transmitted from the information processing apparatus. And a data display device for receiving and displaying the data on a display screen, wherein the information processing device has wireless communication means for enabling data communication with other devices by radio waves, The data to be transmitted can be transmitted as a file by the wireless communication unit, and the data display device is transmitted from the information processing device by a wireless communication unit that enables data communication by radio waves with another device. A data storage unit for storing a file to be displayed, and a viewer function corresponding to the type of file to be displayed stored in the data storage unit; Display data processing means for analyzing the type of the file and activating a viewer function suitable for the display data to create display data; and display means for receiving and displaying the display data created by the display data processing means. It has a configuration.

Further, the data display control method in the data display system according to the present invention includes an information processing apparatus for transmitting data to be displayed, and receiving the data to be displayed transmitted from the information processing apparatus and displaying the data on a display screen. In a data display control method in a data display system having a data display device to be displayed, the information processing device and the data display device each include a wireless communication unit, and the information processing device can transmit data to be displayed as a file. ,
On the data display device side, the file to be displayed sent from the information processing device is stored in the data storage unit, and the file to be displayed at that time is selected from the files to be displayed stored in the data storage unit. Analyzes the type of the file, activates the viewer function according to the file based on the analysis result, creates display data,
The created display data is displayed on the display screen.

In each of these inventions, the information processing device and the data display device exist as components of the wireless network, and when a plurality of information processing devices and at least one data display device exist, the information processing device and the data display device are connected to each other. Data can be exchanged, and a file can be transferred from an arbitrary information processing device to a predetermined data display device, so that the data display device receiving the file can display the data of the file.

Further, in addition to the information processing device and the data display device, a controller capable of remotely operating at least one of the information processing device and the data display device is provided.
The controller has wireless communication means for enabling data communication by radio waves, and is capable of giving a command to at least one of the information processing device and the data display device.

Further, the controller also exists as a component of a wireless network together with the information processing device and the data display device. When a plurality of information processing devices, at least one data display device, and at least one controller are present, Data can be exchanged between information processing devices, and a file can be transferred from any information processing device to a predetermined data display device, and the data of the file can be displayed on the data display device that has received the file. And a command can be transmitted from the controller to a predetermined information processing device or data display device.

As described above, according to the present invention, data between an information processing apparatus holding data to be displayed and a data display apparatus for receiving data to be displayed from the information processing apparatus and displaying the data on a display screen are displayed. The transmission and reception are performed by wireless communication using radio waves. In order to realize this, the information processing apparatus is provided with a wireless communication unit that enables wireless data communication with other devices by radio waves, and data to be displayed is transmitted to the data file (hereinafter, referred to as a data file). In this case, the data display device is also provided with wireless communication means for enabling wireless data communication with other devices by radio waves.

The data display device has a data storage means for storing a file to be displayed sent from the information processing apparatus, and a viewer corresponding to the type of the file to be displayed stored in the data storage means. A data processing unit that has a function, analyzes a file type, activates a viewer function suitable for the file type, and creates display data, and a data display unit that receives and displays the display data created by the data processing unit Are provided.

As described above, by employing wireless communication using radio waves, communication can be performed without being largely affected by other light such as a shield or sunlight, and a communicable distance can be increased. Also, the file is stored as a file in the data storage unit of the data display device, and a file having a display specification at that time is read out of several stored files, and a viewer function corresponding to the file is read out. Is started to generate display data, so that there is no need to send data to be displayed in real time, and display data suitable for a file to be displayed can be generated.

In addition to the information processing device and the data display device, a controller which can be remotely operated by radio communication using radio waves is provided for the information processing device and the data display device. , A control command can be given, so that a reliable operation can be performed even when the information processing device or the data display device is at a remote position.

Further, a wireless network can be constituted by the information processing device, the data display device, the controller and the like. For example, when a conference or the like is held in a large venue or the like, by configuring a network with these devices in the venue, data can be exchanged between users having devices connectable to the network. . For example, presentation materials can be exchanged between personal computers owned by each attendee, and the projector can be controlled from anywhere in the presentation hall. Furthermore, the remote control of the projector can be performed using a remote control, and data of an arbitrary personal computer can be transmitted to the projector using the remote control.

Therefore, it is possible to omit troublesome preparation such as preparing a personal computer dedicated to the projector in advance and storing data to be displayed on the personal computer, and even if the projector is at a remote position, the presentation can be performed. Can display the data while operating the personal computer by himself / herself, so that an efficient presentation can be made.

[0022]

Embodiments of the present invention will be described below. FIG. 1 is a diagram showing a configuration of a data display system according to the present invention, which is roughly divided into a personal computer 1 serving as an information processing device serving as an information source and a liquid crystal projector serving as a data display device (hereinafter simply referred to as a projector). 2. It has a screen 3 for displaying an image output by the projector 2, and further has a remote controller (referred to as a remote controller) 4 for remotely controlling the liquid crystal projector 2 and the personal computer 1.

The personal computer 1 is provided with a wireless communication module 11 capable of communicating with other devices by radio waves, and the projector 2 is also capable of communicating with other devices by radio waves. A wireless communication module unit 21 is provided to enable wireless communication between the personal computer 1 and the projector 2.

The remote controller 4 is also provided with a wireless communication module section 41 capable of communicating with other devices by radio waves so that wireless communication with the projector 2 and the personal computer 1 is possible. An operation of giving a command for sending the data in 1 to the projector 2 and giving various commands (focus control, volume adjustment, input selection, etc.) to the projector 2 can be remotely performed.

In FIG. 1, only one personal computer 1, one projector 2 and one remote controller 4 are shown, but a plurality of these are provided and each is networked. Is assumed. However, in this embodiment, signal transmission and reception by a certain personal computer 1, a certain projector 2, and a certain remote controller 4 will be described.

FIG. 2 shows the configuration of the projector 2. In addition to the wireless communication module unit 21 shown in FIG. 1, an interface unit 22, a buffer 23, a main storage unit 24,
Control unit 25, audio processing unit 26, drawing display processing unit 27, display unit 28, audio / video input unit 29 for inputting analog signals such as video signals, and interface unit 3 thereof
0, an amplifier 31, a speaker 32, and the like. The buffer 23 and the main storage unit constitute a data storage unit 33, and the control unit 25, the audio processing unit 26, and the drawing display processing unit 27 constitute a display data processing unit 34.

The buffer 23 includes the wireless communication module 2
1 temporarily stores the file received from the personal computer 1. The file sent from the personal computer 1 is temporarily stored in the buffer 23, and is sequentially transferred to the main storage unit 24. Also, when performing data processing on the file to be displayed (display target file),
The display target file is read from the main storage unit 24,
It is also used to hold the read display target file.

The main storage unit 24 sequentially stores the files stored in the buffer 23, and is constituted by a hard disk or a flash memory.

The control unit 25 includes the buffer 23 and the main storage unit 2.
4, the interface unit 22, the audio processing unit 26, the drawing display processing unit 27, and other components that control the entire hardware of the projector 2 and have a CPU, a ROM, a RAM, and the like. The control unit 25 controls the entire hardware of the projector 2 and has a viewer function corresponding to the type of the file sent from the personal computer 1. Main storage unit 2 for performing processing
4 is analyzed to determine the type of the file to be displayed, the viewer corresponding to the type is started, and the display data of the file to be displayed in the buffer 23 is drawn and displayed. An operation of transferring the data to the unit 27 is also performed.

When the audio data is included in the display target file, the audio processing unit 26 applies the audio data read from the buffer 23 by the control unit 25 at the same sampling rate as the display data in the display target file. After decoding and D / A conversion, it is sent to the amplifier 31.

When the viewer is started by the control unit 25 and the display target file held in the buffer 23 is transferred, the drawing display processing unit 27 stores the display data in its own frame memory (not shown). Write to. Then, display data is read out for each display frame, and D /
After the A conversion, the data is transferred to the data display means 28.

The data display means 28 has a liquid crystal display (LCD), a lens, a light source and the like, not shown, and displays the display data created by the drawing display processing section 27 on the liquid crystal display. Is projected on the screen 3 using the light source and the lens.

Next, a schematic operation of the projector 2 configured as described above will be described. When the file received by the wireless communication module unit 21 is confirmed to be a file addressed to itself, the file is temporarily stored in the buffer 23 and then sequentially transferred to the main storage unit 24 and stored therein. Then, among the files stored in the main storage unit 24, the display target file to be displayed at that time is transferred to the buffer 23 again, and the control unit 25 analyzes the display target file and specifies the type of the file. Then, a viewer according to the type of the file is started. This control unit 2
5 has a viewer function according to the type of file as described above, and a viewer according to the display target file is started. For example, a viewer such as JPEG or MPEG is prepared for an image file.

In this way, the viewer corresponding to the display target file at that time is started, whereby the display data in the display target file is transferred from the buffer 23 to the drawing display processing unit 27. As a result, the drawing display processing section 27 stores the display data in its own frame memory, reads out the data from the frame memory for each display frame, performs D / A conversion, and sends the data to the data display means 28.

Then, the data display means 28 displays the sent display data on a liquid crystal display (LCD).
It is projected on the screen 3 using a light source and a lens.

On the other hand, the file transferred from the personal computer 1 may include audio data, but if audio data exists, the audio data is stored in the buffer 23.
The data is decoded by the audio processing unit 26 at the same sampling rate as the data in the file to be displayed, D / A converted, and sent to the amplifier 31.

The above is the schematic operation of the projector 2 used in the data display system of the present invention. Next, the processing procedure will be described in detail with reference to the flowchart of FIG. The flowchart in FIG. 3 shows the processing performed by the data receiving side (in this embodiment, the projector 2 side), and is mainly the processing performed by the wireless communication module unit 21 and the control unit 25 of the projector 2.

First, initialization of each hardware in the projector 2 and initialization of the wireless communication module 21 are performed (step s1). In addition to these initial settings, when communication is performed last time, parameter setting of a communication disconnection state when the communication state ends is also performed.

Then, a Beacon frame is transmitted at a constant period (step s2). The Beacon frame is a frame that is output by each device constituting the same network and notifies other devices of the existence of its own device, and has a format as shown in FIG.
The frame shown in FIG. 4 includes a frame type FT indicating the type of the frame, a destination address AD1, a source address AD2, an error check code ER, and the like. In this case, the frame type FT is “Beacon”, the destination address AD1 is “broadcast” indicating all devices constituting the network, and the source address AD
Reference numeral 2 denotes an address of the projector 2 which is the source of the Beacon frame (the address of the projector 2 is represented by PJ1 here) "PJ1", and an error check code ER is set. As the error check code ER, for example, CRC can be used. Here, the error check code ER
A value obtained by calculating the frame type FT, the destination address AD1, and the source address AD2 by using a CRC polynomial is set.

The projector 2 has such a Beacon.
While transmitting a frame, the apparatus is in a reception standby state for waiting for a frame from another device (step s3), and holds the reception standby state until some frame is received. Then, when a frame whose destination address AD1 matches the address allocated to itself is received, a CRC is calculated from the error check code ER of the received frame and the received frame in order to determine whether there is any error in the frame. (Step s4). If they do not match, the frame is discarded, and the process returns to step s2. If the calculated CRC values match, it is determined that the frame has been received normally, and the frame type FT of the frame is checked to determine whether the frame is a connection request (step s5). At this time, if the received frame is a connection request frame, various parameters in the connection request frame are confirmed, and it is determined whether the data is correct as data to be received by itself (step s6).

This connection request frame has a structure as shown in FIG. 5, and, like the Beacon frame, a frame type FT indicating the type of the frame, a destination address AD1, a source address AD2, and an error check code ER. Etc. In this case, frame type F
Assuming that T is a "connection request", the destination address AD1 is to send a signal from the personal computer PC1 to the projector PJ1, and the address "PJ1" of the projector 2 and the source address AD2 are the address of the personal computer 1 (this Here, the address of “PC1” is “PC1”). In addition, the frame type FT and the destination address AD are used as the error check code ER.
1. Set a value obtained as a result of calculating up to the source address AD2 by the CRC polynomial.

When the projector 2 receives such a connection request frame, it determines whether or not the destination address AD1 is an address addressed to itself from among various parameters in the connection request frame. The display is performed (step s7), the process returns to step s2, and if there is no error, the parameter is changed to the connection state (step s7), and an ACK (Acknowledge) frame is transmitted (step s8). This ACK frame has almost the same frame structure as shown in FIG. 5, and the frame type T is "ACK". In this case, an ACK frame is sent back to the personal computer PC1.
The destination address AD1 is “PC1”, and the source address is “PJ1” because it is the projector 2 in this case.
In addition, a CRC calculation value is set as the error check code ER.

By the above steps s4 to s8, the transmitting side (the personal computer 1) and the receiving side (the projector 2)
When the connection request processing with this is completed, actual data (in this case, a file to be displayed by the projector 2) can be transferred only when this state is reached.

In such a state, the projector 2 returns to the state of step s2, and it is assumed that the file to be displayed has been transferred from the personal computer 1. Projector 2
Receives the frame of the file, determines whether or not the frame is a connection request by the frame type FT (step s5). In this case, since the frame type FT is not the “connection request”, the steps s10 and thereafter are performed. Process. FIG. 6 shows an example of a data frame for transferring a file. This data frame has a frame type FT, a destination address AD1, a source address AD
2. Data file DF, error check code ER, etc. In this case, the frame type FT is "data", the destination address AD1 is "PJ1", and the source address AD2 is "PC1".

In the data frame, data to be actually displayed (display data) and command data for another device (in this case, the projector 2) are stored in the data file DF portion. May be. Further, the command data includes a control command (focus control, volume adjustment, input selection, etc.) from the remote controller 4 for controlling each part of the projector 2,
There is a diagnostic command for maintaining each part of the projector 2.

The type of data contained in the data file DF can be distinguished by providing an area Z for describing an identifier indicating the data at the head of the data file DF, for example, in the case of display data to be actually displayed. Are described as "0", "1" for a control command, and "2" for a diagnostic command.

Here, the description returns to step s10 of FIG. Here, it is determined whether or not the file transfer is performed, based on the content described at the head of the data file DF. If "0", it is known that the transmitted data frame is a file containing the display data. In this case, it is determined whether the parameters (such as the destination address AD1) in the data frame are correct. Is determined (step s11).

If there is an error in this parameter, an error is displayed (step s17), and the process returns to step s2. If the parameter is correct, it is determined whether or not the connection processing has been completed (step s12), and the connection processing has been completed. If not, an error is displayed (step s17), and the process returns to step s2. If the connection process is completed, a file reception process is performed (step s13). This file reception process is a process of temporarily storing data in a data frame received by the wireless communication module unit 21 in the buffer 23 and sequentially transferring the data to the main storage unit 24.

The error check code ER of the transmitted data frame is checked (step s1).
4) If an error is detected, the received data frame is discarded (step s18), an error is displayed (step s17), and the process returns to step s2. If there is no error, an ACK frame is transmitted (step s1).
5) A process for displaying the display target file is performed (step s16), and thereafter, the process returns to step s2.

In the process of displaying the display target file, a viewer corresponding to the display target file is started,
This includes a process of creating display data in the drawing display processing unit 27 and displaying it on the screen 3 by the display unit 28, and a process of performing audio processing and outputting audio if there is audio.

The above is the reception processing procedure of the projector 2 in this embodiment. Most of this processing procedure is performed by the wireless communication module unit 21.
The control unit 25 performs the error display process of s17, the process of taking the received file into the buffer 23 and transferring it to the main storage unit 24 (step s13), and the process of displaying the file (step s16). To do.

When it is determined in step s10 of the flowchart of FIG. 3 that the transfer is not file transfer, the process shown in FIG. 7 is performed. In FIG. 7, the frame type FT of the received frame is checked to determine whether the frame is a disconnection notification (step s2).
1) If the notification is a disconnection notification, the parameter is changed in order to change to a disconnected state (step s22). If it is not a disconnection notification, it is determined whether or not it is a command (step s23). If it is a command, processing corresponding to the command is performed (step s24). And AC
The K frame is transmitted (step s25), and the process returns to step s2 of FIG. If it is not a command, an error is displayed (step s26), and the process returns to step s2 in FIG.

The specific processing contents of the command processing performed in step s24 in FIG. 7 are as shown in FIG. In FIG. 8, first, the type of command is determined. That is, it is determined whether the command is a control command for the projector 2 from the remote controller 4 (step 41). As described above, when the received frame is a data frame, whether or not the command is a control command is determined by the identifier Z (display data "0", Command “1” and the diagnostic command “2” for the projector 2), and if the identifier is “1”, it is determined to be a control command and processing corresponding to the control command is performed ( Step s32: As described above, the control commands include focus control, volume adjustment, input selection, etc., and codes corresponding to the respective processing contents are assigned, and the focus control, the volume Performs control such as adjustment and input selection.

In step s31, if the command is not a control command, it is checked whether or not the command is a diagnostic command ("2") (step s33). Command processing (for example, the buffer 23 or the main storage unit 24 of the projector 2)
Etc. are checked (step s34).

When the processing of these control commands and diagnostic commands is completed, the processing returns to step s2 in FIG. On the other hand, if it is determined in step s33 that the command is not a diagnostic command, it is regarded as an error and an error is displayed (step s35), and the process returns to step s2 in FIG.

FIG. 9 shows a processing procedure of the control unit 25 for the file subjected to the reception processing in step s13 of FIG. That is, the file receiving process in step s13 in FIG. 3 is a process of temporarily storing the file received by the wireless communication module 21 in the buffer 23, and then sequentially transferring the file to the main storage unit 24. First, among the files written in the main storage unit 24, the display target file at that time is transferred to the buffer 23 again (step s41). Then, the type of the display target file is specified (step s42). When the type of the display target file is specified, a viewer corresponding to the type is started (step s43), and the display data of the file is drawn and displayed. It is transferred to the unit 27 (step s44). Further, it is checked whether or not the display target file has audio data (step s45). If there is audio data, the audio data is transferred to the audio processing unit 26.

By performing such processing, the file from the personal computer 1 received by the projector 2 is converted into display data by the drawing display processing unit 27, and the display data is projected on the screen 3 by the display unit 28. You. Further, if there is a voice, the voice is processed and output as voice by the speaker 32.

The above is the processing contents on the data receiving side (the projector 2 in this embodiment). Next, the data transmitting side (the personal computer 1 in this embodiment).
Will be described with reference to FIGS. 10 and 11.

In FIG. 10, first, initial settings are made in the same manner as in FIG. In this case, initialization of each hardware in the personal computer 1 and initialization of the wireless communication module are performed (step s51). Then, the presence of a communication partner device on the same network is checked (step s5).
2). That is, this is the state of waiting for the Beacon frame described above, and it is determined whether or not a Beacon frame has been received (step s53).
When the n frames are received, the communication parameters of the other party sending the Beacon frame are acquired, and the acquired communication parameters are registered in the list (step s54).
That is, the source address A described in the received Beacon frame (the Beacon frame shown in FIG. 4)
Based on D2, the name of the device that transmitted it and its address are registered in a list. Such processing is performed for all received Beacon frames.

The processing up to this point is for preparing communication on the data transmission side (PC 1). By performing such communication preparation processing, communication parameters (address, etc.) of other devices sharing the network can be obtained. ) List is created. After the communication preparation processing is performed in this way, the actual communication processing is started. This will be described with reference to FIG.

In FIG. 11, when a transmission start request from a user is received (step s61), it is checked whether or not the address of the communication partner (projector 2 in this case) exists in the list based on the transmission start request. If not, an error is displayed (step s63). If there is an address of the communication partner (projector 2), a connection request frame is created using the address and transmitted.

In this connection request frame, the frame type FT is “connection request”, and the destination address AD1 is “P”.
J1 ", the source address AD2 is" PC1 ", and a value calculated by CRC is set as the error check code ER.

When such a connection request frame is transmitted, the device (projector 2) having the destination address AD1 (“PJ1”) performs the processing of steps s4 to s8 in the flowchart of FIG. Send it back.

At this time, the personal computer 1 on the sending side receives the AC
The K frame reception standby state is set (step s65).
Then, it is determined whether an ACK frame from the receiving side (projector 2) has been received within a predetermined time (step s66). If you can not receive within a certain time,
It is determined whether the number is within the number of times the connection request can be retransmitted (step s67). If the number is within the number of times the connection request can be retransmitted, the process returns to step s64 again to retransmit the connection request frame. On the other hand, if the number of times that the connection request can be retransmitted is exceeded, an error is displayed (step s68).

In the process of step s66, if an ACK frame is received within a predetermined time, a file to be displayed is transferred (step s69). Then, the personal computer 1 enters a state of waiting for reception of an ACK frame (step s70). Thereafter, it is determined whether an ACK frame from the receiving side (projector 2) has been received within a predetermined time (step s7).
1). If the file cannot be received within the fixed time, it is determined whether or not the number of times the file can be retransmitted is reached (step s72).
If it is within the number of times the file can be retransmitted, step s6 is performed again.
9 and resend the file. On the other hand, if the number of times that the file can be retransmitted is exceeded, an error is displayed (step s73).

In the process of step s71, if an ACK frame can be received within a predetermined period of time, it is determined that the transmission process has been completed, and a disconnection notification is transmitted (step s74). The parameters set at that time are discarded (step s75), and then the process returns to step s52 in FIG.

As described above, according to the embodiment of the present invention, data can be exchanged between the personal computer 1 and the projector 2 by radio communication using radio waves. Unlike conventional communication, communication can be performed without being affected by a shield or sunlight, and the communication distance can be increased because of wireless communication using radio waves. Moreover, in the embodiment of the present invention, data to be displayed is sent to the projector 2 as a file,
The projector 2 stores the received file in the buffer 23.
, And sequentially transferred to the main storage means 24,
From the files stored in the main storage means 24, a file to be displayed (display target file) at that time is read out, a viewer corresponding to the display target file is started, and display data is created. The image is projected on the screen 3.

By performing such processing, it is not necessary to send a large amount of data to be displayed to the projector 2 side in real time, and the wireless communication module unit used in the present invention has a low communication speed and a low cost. Can respond.

Further, by providing such a wireless communication module unit in each of the devices such as the projector 2, the personal computer 1, and the remote controller 4, it is possible to easily configure a network with the projector, the plurality of personal computers, the plurality of remote controllers, and the like. . For example, if these devices form a network in a presentation hall,
Attendees who have devices that can connect to the network can exchange data. For example, presentation materials can be exchanged between personal computers owned by each attendee, and the projector can be controlled from anywhere in the presentation hall. Further, the remote control of the projector can be performed using a remote controller, and data of an arbitrary personal computer can be transmitted to the projector using the remote controller.

Therefore, it is possible to omit troublesome preparations such as preparing a personal computer dedicated to the projector in advance and storing data to be displayed on the personal computer, and even if the projector is at a remote position, the presentation can be performed. Can display the data while operating the personal computer by himself / herself, so that an efficient presentation can be made. Of course, it is also possible to prepare a plurality of projectors, transfer data from an arbitrary personal computer to an arbitrary projector, and display the data.

Further, this network can be connected not only to a network closed in a certain venue but also to the Internet, for example.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention. Further, a processing program for performing data display control for performing the processing of the present invention described above includes a floppy disk, an optical disk,
It can be recorded on a recording medium such as a hard disk, and the present invention also includes the recording medium. Further, the processing program may be obtained from a network.

[0073]

As described above, according to the present invention, the information processing apparatus is provided with wireless communication means for enabling wireless data communication with other devices by radio waves, and the data to be displayed is transmitted by the wireless communication means. Means for transmitting data as a file, and the data display device is provided with wireless communication means for enabling wireless data communication with other devices by radio waves. It has data storage means for storing the file to be displayed sent from the device, and a viewer function according to the type of file to be displayed stored in this data storage means. Data processing means for activating the viewer function to create display data, and data display means for receiving and displaying the display data created by the data processing means. To have.

As described above, since the present invention employs radio communication using radio waves, communication can be performed without being greatly affected by other light such as a shield or sunlight, and the communicable distance can be increased. it can. Also, the data is stored in the data storage unit of the data display device as a file, and the display data is created using the viewer function corresponding to the file to be displayed at that time, so that the data is displayed. The need to send large amounts of data in real time.

Further, in addition to the information processing device and the data display device, a controller which can be remotely operated by radio communication using radio waves is provided for the information processing device and the data display device. , Various commands can be given to the user, so that a reliable operation can be performed even if the information processing device or the data display device is at a remote position.

Further, a wireless network can be constituted by the above information processing device, data display device, controller and the like. For example, when a conference or the like is held in a large venue or the like, by configuring a network with these devices in the venue, data can be exchanged between users having devices connectable to the network. . For example, presentation materials can be exchanged between personal computers owned by each attendee, and the projector can be controlled from anywhere in the presentation hall. Further, the remote control of the projector can be performed using a remote controller, and data of an arbitrary personal computer can be transmitted to the projector using the remote controller.

Therefore, it is possible to omit troublesome preparation such as preparing a personal computer dedicated to the projector in advance and storing data to be displayed on the personal computer, and even if the projector is located at a remote position, the presentation can be performed. Can display the data while operating the personal computer by himself / herself, so that an efficient presentation can be made.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram illustrating an embodiment of a data display system of the present invention.

FIG. 2 is a diagram showing a configuration example of the projector shown in FIG.

FIG. 3 is a flowchart illustrating a processing procedure on the data receiving side (projector side).

FIG. 4 is a configuration diagram of a Beacon frame used in the embodiment of the present invention.

FIG. 5 is a configuration diagram of a connection request frame used in the embodiment of the present invention.

FIG. 6 is a configuration diagram of a data frame used in the embodiment of the present invention.

7 is a flowchart illustrating a processing procedure on the data receiving side (projector side), and is a flowchart illustrating a processing procedure when it is determined that the transfer is not a file transfer in the processing procedure of FIG. 3;

8 is a flowchart illustrating a processing procedure on the data receiving side (projector side), and is a flowchart illustrating command processing in the processing procedure of FIG. 7;

FIG. 9 is a flowchart illustrating a file display processing procedure performed by a control unit of the projector.

FIG. 10 is a flowchart illustrating a processing procedure on a data transmission side (a personal computer side), and is a flowchart illustrating a communication preparation process.

FIG. 11 is a flowchart illustrating a processing procedure on the data transmission side (the personal computer side), and is a flowchart illustrating an actual file transmission process after the communication preparation process.

[Explanation of symbols]

 Reference Signs List 1 information processing device (personal computer) 2 data display device (projector) 3 screen 4 controller (remote controller) 11, 21, 41 wireless communication module unit 22, 30 interface unit 23 buffer 24 main storage unit 25 control unit 26 audio processing unit 27 drawing Display processing unit 28 Display means 29 Audio / video input unit 31 Amplifier 32 Speaker 33 Data storage means 34 Display data processing means

Claims (8)

[Claims] 1. A data display system comprising: an information processing device for transmitting data to be displayed; and a data display device for receiving the data to be displayed transmitted from the information processing device and displaying the data on a display screen. The information processing apparatus has a wireless communication unit that enables data communication with another device by radio waves, and enables data to be displayed to be transmitted as a file by the wireless communication unit. Wireless communication means for enabling data communication with other devices by radio waves, data storage means for storing a file to be displayed sent from the information processing apparatus, and display data stored in the data storage means It has a viewer function according to the type of file to be analyzed. Data display system characterized by having a display data processing unit, display means for displaying by receiving the display data generated by the display data processing unit. 2. The information processing device and the data display device,
When there are a plurality of information processing devices and at least one data display device as components of a wireless network, data can be exchanged between the information processing devices and a predetermined 2. The data display system according to claim 1, wherein a file transfer to the data display device is enabled, and data display of the file is enabled on the data display device receiving the file. 3. In addition to the information processing device and the data display device, a controller that can remotely control at least one of the information processing device and the data display device is provided, and the controller is a wireless communication device that enables data communication by radio waves. 2. The data display system according to claim 1, further comprising means for giving a command to at least one of the information processing device and the data display device. 4. The controller also exists as a component of a wireless network together with the information processing device and the data display device, and includes a plurality of information processing devices and at least one
When one data display device and at least one controller are present, data can be transferred between the information processing devices, and a file can be transferred from any information processing device to a predetermined data display device. 4. The data display device according to claim 3, wherein the data display device receiving the file enables data display of the file, and the controller can transmit a command to a predetermined information processing device or data display device. Data display system. 5. A data display system comprising: an information processing device for transmitting data to be displayed; and a data display device for receiving the data to be displayed transmitted from the information processing device and displaying the data on a display screen. In the display control method, the information processing device and the data display device each include a wireless communication unit, the information processing device can transmit data to be displayed as a file, and the data display device side receives the data from the information processing device. The transmitted file to be displayed is stored in the data storage unit, and the type of the file to be displayed at that time is analyzed from the files to be displayed stored in the data storage unit, and based on the analysis result, Activate the viewer function according to the file, create the display data, and display the created display data. Data display control method in a data display system is characterized in that so as to display on the screen. 6. The information processing device and the data display device,
When there are a plurality of information processing devices and at least one data display device as components of a wireless network, data can be exchanged between the information processing devices and a predetermined 6. The data display control method in a data display system according to claim 5, wherein the file transfer to the data display device is enabled, and the data display of the file is enabled in the data display device receiving the file. 7. In addition to the information processing device and the data display device, a controller that can remotely control at least one of the information processing device and the data display device is provided, and the controller is a wireless communication device that enables radio wave data communication. 6. A data display control method in a data display system according to claim 5, further comprising means for giving a command to at least one of the information processing device and the data display device. 8. The controller also exists as a component of a wireless network together with the information processing device and the data display device.
When one data display device and at least one controller exist, data can be exchanged between the information processing devices, and a file can be transferred from any information processing device to a predetermined data display device. 8. The data display device according to claim 7, wherein the data display device receiving the file can display data of the file, and the controller can transmit a command to a predetermined information processing device or a data display device. A data display control method in a data display system.