This application claims the benefit of Taiwan application Serial No. 94135277, filed Oct. 7, 2005, the subject matter of which is incorporated herein by reference.
1. Field of the Invention
The invention relates in general to a projector, and more particularly to a projector for issuing a display authority token to the computers connected to the same.
2. Description of the Related Art
Nowadays projectors have been an essential electronic product in a conference room. Lots of technical reports and analysis are displayed on a screen via a projector.
Projectors can be divided into two classes, one is network connectible, and the other is not network connectible. The not-network-connectible projector performs an image transmission operation via an interface connector such as DVI or HDMI. Supposed there are many users who take turns to make a report by using a not-network-connectible projector in a conference room. They need to connect their own computers to a connector of the not-network-connectible projector before they make a report. For this reason, it will waste much time and damage the connecter more easily to have the connector of the network-connectible projector inserted to and unplugged from the computers.
Compared to the not-network-connectible projector, the network-connectible projector performs a relatively simpler operation. The network-connectible projector manages report orders via a manager such that each user's computer takes turns to be coupled to the network-connectible projector for report. However, in practical application, it still needs a manager to perform a complicated mechanism of authority control, arbitration and connection management. Therefore, it is still not easy for the present network-connectible projector to have a practical management and it is also difficult to find a skilled person to perform authority settings in a practical operation, thereby causing usage inconvenience of the projector.
It is therefore an object of the invention to provide a projector. The users can take turns easily to transmit frames of their computers to the projector according to the practical conference orders without need of an extra manager for performing complicated authority control.
The invention achieves the above-identified object by providing a projector for selectively connecting to a number of computers is disclosed. The projector includes an access-point module and a projection module. The access-point module is for issuing a display authority token to one of the computers connected to the projector in response to a computer request for the display authority token. The project module is for projecting a video data of the computer with the display authority token.
The invention achieves the above-identified object by providing a method for establishing a video data communication among a projector and a plurality of computers. The projector is capable to issue a display authority token to one of the computers. The method comprises receiving by the projector a computer request for the display authority token sent from one of the computers; issuing by the projector the display authority token to the computer in response to the computer request, so as to establish the video data communication with the computer with the display authority token; and projecting, by the projector, the video data from the computer with the display authority token.
The invention achieves the above-identified object by providing a network communication system. The network communication system comprises a plurality of computers and a projector for selectively connecting to the computers. The projector comprises an access-point module and a projection module. The access-point module is for issuing a display authority token to one of the computers connected to the projector in response to a computer request for the display authority token. The projection module is for projecting the video data from the computer with the display authority token. Each of the computers is independently capable to send a computer request to the projector.
The invention achieves the above-identified object by providing a method for transmitting a first video data from a first computer and a second video data from a second computer to a projector. The first and the second computers are capable of being selectively un-authorized and authorized. The method comprises connecting the first computer, the second computer and the projector; making the first and the second computers un-authorized; sending, by the first computer, a computer request for a display authority token to the projector; issuing, by the projector, the display authority token to the first computer to make the first computer authorized; sending the first video data from the first computer being authorized to the projector, and the projector projecting the first video data; and sending, by the second computer, a computer request for the display authority token to the projector, after the first computer stops sending the first video data to the projector.
The invention achieves the above-identified object by providing a method for transmitting a video data of one of a plurality of computers to a projector. The method comprises connecting the computers and the projector; synchronously outputting a format from the computers and the projector; detecting, by each of the computers, whether a display authority token from the projector is received; making, by one of the computers which does not receive the display authority token, a computer request for the display authority token; sending the computer request to the projector; receiving, by the computer, the display authority token from the projector; waiting for, by the computer with the display authority token, a projector request for a refresh video data from the projector; and sending a video data from the computer with the display authority token to the projector in response to the projector request.
Other objects, features, and advantages of the invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The following description is made with reference to the accompanying drawings.
A network communication system includes a projector and a number of computers. In the network communication system, each of the computers is independently capable to send a computer request for the display authority token to the projector. Each computer can be connected to the projector on wire or by a wireless way.
The projector includes an access-point module and a projection module. The projection module includes a chassis, a digital micro-mirror device (DMD), a color wheel etc. to perform light propagation and separation. The access-point module is for performing signal transmission and reception and controlling the number of the computers connected to the projector to be less than a predetermined limitation. In the embodiment, the users use the computers to send respectively a computer request for the display authority token to the access-point module in order to transmit a video data prepared for display via the projection module. In the following description, an example is taken to illustrate how the projector makes a video data communication with the computers and how the computers take turns to output the video data thereof.
Referring to
Referring to
In the step 207, each of the second computer 113 and the third computer 115 will display a button or icon representative of the computer request for the display authority token on its screen. According to the conference ethics, if the first user finishes the report, the second user needs only to select the button or icon on the screen of the second computer 113 by cursor to receive the display authority token instead of the first user. In the same way, the third user can wait until the second user finishes the report and then select the button or icon on the screen of the third computer 115 by cursor to receive the display authority token. In a conference, the next user only needs to wait for the previous user to finish reporting and select the button or icon by cursor on his/her own computer to display the video data via the projector.
The above-mentioned process shows how to transmitting a video data of one of the computers to the projector. In the following description, a process for performing network connection and frame display operation is illustrated from a point view of the projector. The projector 101 as turned on will perform the following steps. Referring to
Owing that every projector 101 has a limitation to the number of computers requesting for connection, the projector 101 will perform the steps 301 and 302 to control the amount of the computers in connection. If the number of computers which the projector 101 can be connected to is 4, take
Moreover, each computer connected to the projector 101 will perform a synchronous output format operation with the projector 101 as mentioned in step 203. Meanwhile, the computers and projector 101 will test the system compatibility. For example, the projector 101 checks or coordinates parameters such as resolution and display frequency of output frames. In step 305, it can be designed that the computer which is foremost for connecting to the projector 101 can receive the display authority token. For example, in
In the steps 313 and 315, the projector 101 will detect the video data communication and the display authority token of the computer periodically. For example, after the first user finishes using the first computer 111 to report, the projector 101 interrupts the connection with the first computer 111 such that the video data communication is interrupted simultaneously. At this time, the projector 101 detects the interruption and returns to the step 305. If the second user makes the computer request for the display authority token, the projector 101 will issue the display authority token to the second computer 113.
In terms of the network communication system 100, it executes the following steps. Referring to
According to the projector and method for issuing the display authority token to computers from the same disclosed by the above-mentioned embodiment of the invention, each user can just select the button or icon by cursor on the screen of his/her computer to receive the display authority token from the projector and directly transmit video data of the computer to the projector for projection in conference orders without extra authority managers. Therefore, the projector does not waste the conference time in connector insertion and unplug like the not-network-connectible projector and thus can improve the variety of product usage.
While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
Number | Date | Country | Kind |
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94135277 | Oct 2005 | TW | national |