JP2002252880A - Liquid crystal projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal projector capable of remote operation, without having to use exclusive applications for control of a liquid crystal projector through a control computer. SOLUTION: The liquid crystal projector includes a server means, connected to a control computer via a network. The server means includes a means for controlling the liquid projector, according to the demand from a browser of the control computer connected to the network.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal projector which is mounted on a ceiling or the like and is difficult to perform internal adjustment, setting change, and the like by directly operating the liquid crystal projector.

[0002]

2. Description of the Related Art A large-sized liquid crystal projector is often mounted on a ceiling, and control such as internal adjustment and setting change is often performed from a remote place by a controller (generally, a PC). In this case, conventionally, control is performed by connecting the liquid crystal projector and the controller with a dedicated line, and executing a dedicated application for controlling the liquid crystal projector on the controller side.

However, in the conventional example, since a dedicated application for controlling the liquid crystal projector is required on the controller side, a specific type of OS (Operating System) is required.
There is a problem that it is necessary to use a computer that implements m) or to prepare a number of dedicated applications for various OSs.

In the prior art, since the liquid crystal projector and the controller are connected by a dedicated line, it is necessary to switch the connection one by one in order to control a plurality of liquid crystal projectors with one controller. Was.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal projector which enables a control computer to remotely control a liquid crystal projector without using a dedicated application for controlling the liquid crystal projector.

[0006]

A first liquid crystal projector according to the present invention comprises server means connected to a control computer via a network, and the server means includes a control computer connected to the network. The liquid crystal projector is provided with means for controlling the liquid crystal projector in response to an operation request from a browser.

A second liquid crystal projector according to the present invention includes server means connected to a control computer via a network, and the server means transmits an internal state request from a browser of the control computer connected to the network. Means for transmitting the internal state of the liquid crystal projector to the control computer.

[0008] A third liquid crystal projector according to the present invention comprises server means connected to a control computer via a network, and the server means responds to an operation request from a browser of the control computer connected to the network. Means for controlling the liquid crystal projector accordingly, and means for transmitting the internal state of the liquid crystal projector to the control computer in response to an internal state request from the browser of the control computer connected to the network. I do.

[0009]

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

FIG. 1 shows the configuration of a control system for a liquid crystal projector.

The control system for a liquid crystal projector includes a liquid crystal projector 1 and a control computer 4 connected to the liquid crystal projector 1 via a network 3.

The liquid crystal projector 1 incorporates a server module (server means) 2. The server module 2 is an HTTPd (HyperText Transfer Protocol daemon) which is a server application dedicated to a Web server.
n) and a CGI (Common Gateway Interface), and are connected to the control computer 4 via a network. Here, the IP address of the server module 2 is “192.168.0.3”.

A WWW browser is installed in the control computer 4. As the network 3, for example, a LAN configured by TCP / IP-based Ethernet (registered trademark) is used.

FIG. 2 shows the electrical configuration of the liquid crystal projector main body CPU and the server module 2.

The liquid crystal projector 1 includes a liquid crystal projector main body side CPU 11 and a RAM 12.

The liquid crystal projector main body CPU 11 performs optical and mechanical controls such as zooming and focusing, adjusts electrical characteristics such as contrast and brightness, and monitors the internal state of the liquid crystal projector 1. RAM 12 is a CPU
Reference numeral 11 denotes a work RAM, which is used, for example, for storing the internal state of the liquid crystal projector 1 and reconstructing content information such as images and sounds passed from the server module.

The server module 2 includes a server module side CPU 21, an HDD 22, and a network device (Network Device) 23. The server / module side CPU 21 is a liquid crystal projector main body side CP.
It is connected to U11. Server module side CPU
Reference numeral 21 is connected to a network via a network device 23. Server module side CPU 21
Performs data exchange with the liquid crystal projector main body CPU 11 to control the liquid crystal projector main body and collect information from the liquid crystal projector main body.

The HDD 22 has a server module side C
A program and an OS of the PU 21 are stored. In some cases, contents such as images and sounds are also stored.

Referring to FIG. 3, an operation when remote-controlling liquid crystal projector 1 using control computer 4 will be described.

The HTTPd 31 is a server application dedicated to a Web server. CGI program 32
Is started by the HTTPd 31 and the setting file 3
3 is rewritten. The setting file 33 sets the operation of the control program 34 of the liquid crystal projector.

The control program 34 includes a setting file 33
Various controls of the liquid crystal projector are performed while referring to the contents of the above. The type of control differs depending on the type of the target 35. The target 35 represents a mechanism or a circuit to be controlled. Specifically, a zoom mechanism, a focus mechanism,
A contrast adjustment circuit, a brightness adjustment circuit, and the like are included.

On the liquid crystal projector side, since the HTTPd 31 is operating in the server module 2, the liquid crystal projector 1 is recognized as a WWW server by the control computer 4 on the network 3.

The operator accesses the liquid crystal projector 1 by operating the control computer 4 having a WWW browser function, and performs a predetermined operation for controlling the liquid crystal projector 1. When receiving the instruction from the control computer 4, the HTTpd 31 activates the CGI program 32 according to the received instruction. CGI
The program 32 rewrites the contents of the setting file 33 according to the contents of the instruction from the control computer 4. When the content of the setting file 33 is rewritten, the control program 34 controls the target 35 according to the rewritten content.

Therefore, the operator accesses the liquid crystal projector 1 on the network 3 using the browser function of the control computer 4 to change the image quality setting of the liquid crystal projector 1 or to change the optical magnification. Or it can be changed.

When contents such as images and sounds are stored in the HDD 22, the operator accesses the liquid crystal projector 1 on the network 3 using the browser function of the control computer 4, and
It is also possible to realize a slide show using the content stored in D22. At this time, the RAM 12 is used for developing and reconstructing the image.

Referring to FIG. 4, the operation when browsing the internal state of liquid crystal projector 1 using control computer 4 will be described.

In FIG. 4, reference numeral 36 denotes a data file in which the internal state of the liquid crystal projector 1 is described.
Reference numeral 37 denotes an HTML file created based on the data file.

An operator accesses the liquid crystal projector 1 by operating the control computer 4 having a WWW browser function, and performs a predetermined operation for obtaining information on the internal state of the liquid crystal projector 1. As a result, a request for obtaining information on the internal state of the liquid crystal projector 1 from the control computer 4 is issued via HTTP.
It is transmitted to d31.

When the HTTPd 31 receives this request, it activates the CGI program 32 according to the received request. The CGI program 32 includes a data file 36
Read data from If necessary, before reading data from the data file 36, the content of the data file 36 may be updated to the latest information.

The CGI program 32 creates an HTML file 37 based on the read data. HTTP
d31 is H created by the CGI program 32.
The TML file 37 is transmitted to the control computer 4 as information on the internal state of the liquid crystal projector 1. The control computer 4 displays the received information on the internal state of the liquid crystal projector 1.

That is, the operator operates the control computer 4
By accessing the liquid crystal projector 1 on the network 3 using the browser function, the information on the internal state of the liquid crystal projector 1 can be browsed by the control computer 4.

FIG. 5 shows an example in which a plurality of liquid crystal projectors 1 are connected to the same network 3.

Each liquid crystal projector 1 incorporates the server module 2 as described above. Different IP addresses are assigned to the respective liquid crystal projectors 1. The control computer 4 can access any of the liquid crystal projectors 1 by using the URL and perform control.

By installing a client program on the liquid crystal projector 1 on the network shown in FIG.
It is also possible to run a client program in parallel with the TTPd31.

Here, the client program is W
Similar to the WW browser, the CG is sent to the HTTPd 31 running on another liquid crystal projector 1 on the network.
This is for instructing execution of the I program. With this client program, it becomes possible to operate the liquid crystal projectors on the network synchronously or sequentially.

Referring to FIG. 6, the operation when the same control is performed simultaneously from control computer 4 to each liquid crystal projector 1 on network 3 will be described.

In FIG. 6, it is assumed that two liquid crystal projectors are connected on the network 3. One liquid crystal projector is a first liquid crystal projector 101, and the other liquid crystal projector is a second liquid crystal projector 2
Let's say 01.

The first liquid crystal projector 101 has a
A client program 138 is provided in addition to the d131 and the CGI program 132. The second liquid crystal projector 201 includes a client program 238 in addition to the HTTPd 231 and the CGI program 232.

First, as indicated by a dashed line A, the control computer 4 reads the HTTPd of the first liquid crystal
The first liquid crystal projector 101 is controlled by activating the CGI program 132 via 131.

At this time, the CGI program 132 simultaneously executes the client program 138 as shown by the broken line B.
To access the HTTPd 231 of the second liquid crystal projector 201 as shown by the broken line C.

HTTPd 231 is a CGI program 23
2 activates the second liquid crystal projector 201
Is controlled.

When another liquid crystal projector is connected to the network 3, the CGI program 232 of the second liquid crystal projector 201 controls the other liquid crystal projector by accessing the HTTP d of the other liquid crystal projector. It is also possible.

As described above, the control computer 4 controls a single liquid crystal projector on the network to control a plurality of liquid crystal projectors connected to the network. For example, it is possible to simultaneously switch the input to a plurality of liquid crystal projectors connected to a network, and to turn on the power supply at regular time intervals so as not to apply an excessive load to the power supply. .

[0044]

According to the present invention, the control computer can remotely control the liquid crystal projector without using a dedicated application for controlling the liquid crystal projector.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a control system of a liquid crystal projector.

FIG. 2 is a block diagram mainly showing an electrical configuration of a liquid crystal projector main body CPU and a server module 2;

FIG. 3 is a functional block diagram for explaining an operation when the liquid crystal projector 1 is remotely controlled using a control computer 4.

FIG. 4 is a functional block diagram for explaining an operation when browsing the internal state of the liquid crystal projector 1 using the control computer 4.

FIG. 5 is a block diagram showing an example in which a plurality of liquid crystal projectors 1 are connected to the same network 3.

FIG. 6 is a functional block diagram for explaining an operation when the same control is performed simultaneously from the control computer 4 to each of the liquid crystal projectors 1 on the network 3.

[Explanation of symbols]

 1 LCD projector 2 Server module 3 Network 4 Control computer

Claims (3)

[Claims] 1. A control computer comprising a server connected to a control computer via a network, wherein the server controls the liquid crystal projector in response to an operation request from a browser of the control computer connected to the network. LCD projector equipped with. 2. The liquid crystal projector according to claim 1, further comprising: a server connected to the control computer via a network, wherein the server receives an internal state request from a browser of the control computer connected to the network. A liquid crystal projector comprising means for transmitting a state to a control computer. 3. A control device comprising server means connected to the control computer via a network, wherein the server means controls the liquid crystal projector in response to an operation request from a browser of the control computer connected to the network. And a means for transmitting the internal state of the liquid crystal projector to the control computer in response to an internal state request from a browser of the control computer connected to the network.