JP4742299B2 - Data projector and projection system - Google Patents

Description

The present invention relates to a data projector and a projection system .

There is a data projector that images and projects data supplied from a computer. In addition, there is a projection system in which data is transmitted from a computer to a data projector by wireless communication, and a control command is transmitted to the data projector to operate the data projector (for example, see Patent Document 1).
Japanese Patent Laying-Open No. 2004-053760 (page 3, FIG. 1)

  However, in such a conventional projection system, data cannot be transmitted to project an image unless communication settings are made between the data projector and the computer. This communication setting work is complicated and particularly difficult for beginners.

SUMMARY An advantage of some aspects of the invention is that it provides a data projector and a projection system capable of easily performing communication settings by wireless communication.

In order to achieve this object, a data projector according to the first aspect of the present invention provides:
In a data projector that receives data by wireless communication from a terminal, performs image processing of received data, and projects an image on a projection surface.
A main body storage unit for storing communication setting information necessary for wireless communication;
It has a plurality of keys, and is a communication setting information stored in the main body storage unit by operating these keys, a connection network name for identification in a wireless communication network and information on a channel used for wireless communication An input unit capable of inputting rewrite information;
A storage control unit that has a wireless communication function and is equipped with a removable communication device equipped with a storage unit, and stores communication setting information stored in the main body storage unit in the storage unit of the communication device;
When the communication device is attached to the terminal, wireless communication is performed with the communication device according to communication setting information stored in the main body storage unit and the storage unit of the communication device, and data is transmitted from the terminal. A communication unit for receiving,
A data projector characterized by that.

The main body storage unit may be composed of a rewritable nonvolatile memory .

The communication device
Connected to the terminal via a data line for receiving data,
A transmission unit for transmitting data supplied from the terminal via the data line by wireless communication;
A secondary battery that supplies power necessary for wireless communication to the transmitter, and
You may make it provide the charging part which charges the secondary battery of the said communication apparatus when the said communication apparatus is mounted | worn.

A projection system according to a second aspect of the present invention is
In a projection system that includes a data projector, a terminal, and a communication device, receives data wirelessly transmitted from the terminal via the communication device, performs an imaging process on the received data, and projects an image on a projection surface ,
The communication device is detachable from the data projector and the terminal, has a wireless communication function and a storage unit,
The data projector is
A main body storage unit for storing communication setting information necessary for wireless communication;
It has a plurality of keys, and is a communication setting information stored in the main body storage unit by operating these keys, a connection network name for identification in a wireless communication network and information on a channel used for wireless communication An input unit capable of inputting rewrite information;
A storage control unit that stores communication setting information stored in the main body storage unit in the storage unit of the communication device when the communication device is mounted;
When the communication device is attached to the terminal, wireless communication is performed with the communication device according to communication setting information stored in the main body storage unit and the storage unit of the communication device, and data is transmitted from the terminal. A communication unit for receiving,
A projection system characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the communication setting by radio | wireless communication can be performed easily.

Hereinafter, description with reference to the accompanying drawings data projector and a projection system according to an embodiment of the present invention.
(Embodiment 1)
FIG. 1 shows the configuration of the projection system according to the first embodiment.
The projection system according to the first embodiment includes a data projector 1, a computer 2, and a communication device 3.

  The communication device 3 is a LAN (Local Area Network) card, and includes a connection terminal 301, a memory 302, and a communication unit 303.

  The connection terminal 301 is a terminal that can be attached to and detached from the data projector 1 or the computer 2.

  The memory 302 is provided for storing communication setting information necessary for performing wireless communication. This communication setting information will be described later.

  The communication unit 303 is for transmitting data to the data projector 1 by wireless communication when the communication device 3 is attached to the computer 2.

  The data projector 1 is for receiving data from the computer 2 via the communication device 3 by wireless communication and imaging it, and projecting this image onto a projection surface such as a screen.

  The data projector 1 includes a projection device 101, an image processing unit 102, a display unit 103, an input device 104, an infrared signal receiving unit 105, a memory 106, a ROM 107, a RAM 108, a CPU 109, and a connection terminal 110. And a network control unit 111 and a communication unit 112.

  The projection apparatus 101 is for projecting an image onto a projection plane based on data or the like processed by the image processing unit 102.

  The image processing unit 102 performs image processing such as correction of trapezoidal distortion of the image projected on the projection surface.

  The display unit 103 is for displaying various data and images processed by the image processing unit 102.

  The input device 104 is for inputting data, and includes a numeric keypad (not shown). The input device 104 acquires data input by a user operating a numeric keypad or the like.

  The infrared signal receiving unit 105 is for receiving an infrared signal from a remote controller (not shown) attached to the data projector 1. Similar to the input device 104, this remote controller is for inputting data, and includes a numeric keypad, a transmission button, and the like.

  The remote controller transmits this data as an infrared signal when data is input by the user operating a numeric keypad and the transmission button is pressed. When receiving the infrared signal from the remote controller, the infrared signal receiving unit 105 transmits the acquired data to the CPU 109.

  The memory 106 stores communication setting information in advance. The memory 106 is configured by, for example, a flash memory that can erase and write data, and whose stored contents are not lost even when the power of the data projector 1 is turned off.

  The communication setting information is information necessary for the communication unit 112 to perform wireless communication with the communication device 3, and the memory 106 includes a connection network name and channel information used for wireless communication as communication setting information. Remember.

  The connection network name is an identification name of the data projector 1 in the communication network, and the use channel information is information on a channel used for wireless communication.

  The ROM 107 stores data such as a program executed by the CPU 109. The RAM 108 stores data necessary for the operation of the CPU 109.

  The CPU 109 is for controlling the entire data projector 1. Specifically, when the communication device 3 is attached to the data projector 1, the CPU 109 reads communication setting information from the memory 106 and supplies the communication setting information to the network control unit 111. Then, the CPU 109 controls the network control unit 111 so as to be stored in the memory 302 of the communication device 3.

  In addition, the CPU 109 acquires information transmitted from the input device 104 and the infrared signal receiving unit 105, and controls the data projector 1 based on the acquired information.

  The connection terminal 110 is used to attach the communication device 3 to the data projector 1 and is connected to the connection terminal 301 of the communication device 3 so that data can be input / output between the data projector 1 and the communication device 3. become.

  The network control unit 111 is for making settings related to communication. When the communication setting information is supplied from the CPU 109, the network control unit 111 is controlled by the CPU 109 and stores the communication setting information in the memory 302 of the communication device 3.

  The network control unit 111 stores the connection network name and channel information of the data projector 1 in the memory 302 of the communication device 3 as communication setting information.

  The communication unit 112 performs wireless communication with the communication device 3 attached to the computer 2 and receives data from the computer 2 when communication setting is performed according to the communication setting information.

  The computer 2 is a terminal for supplying data to the data projector 1. The computer 2 includes a connection terminal 201, an input device 202, a storage device 203, a video adapter 204, a VRAM 205, a display device 206, a network control unit 207, a RAM 208, and a CPU 209.

  The connection terminal 201 is for mounting the communication device 3. When the communication device 3 is mounted on the computer 2, data can be input / output between the computer 2 and the communication device 3.

  The input device 202 includes a keyboard, a mouse, a numeric keypad, and the like, and is used for inputting data. When a transmission command for transmitting an RGB signal is input, the input device 202 transmits this transmission command to the CPU 209.

  The storage device 203 includes a semiconductor memory, an HDD (Hard Disk Drive), and the like, and stores communication setting information, data, and the like. The storage device 203 also stores various program data executed by the CPU 209.

  The video adapter 204 is for connecting devices related to screen display such as the VRAM 205 and the display device 206. A VRAM (Video Random Access Memory) 205 is for storing R (red), G (green), and B (blue) data.

  The display device 206 is composed of, for example, a liquid crystal display and is for displaying an image based on RGB data stored in the VRAM 205. When displaying an image, the display device 206 acquires RGB data from the VRAM 205 via the video adapter 204.

  The network control unit 207 is for performing settings related to wireless communication and network control, and for supplying RGB signals supplied from the CPU 209 to the communication device 3.

  When the communication device 3 is attached to the computer 2 and the communication setting information is stored in the memory 302, the network control unit 207 reads the communication setting information from the memory 302. The network control unit 207 supplies the read communication setting information to the CPU 209.

  When performing wireless communication, the network control unit 207 is supplied with communication setting information from the CPU 209 and performs settings related to wireless communication based on the communication setting information. That is, the network control unit 207 performs connection processing by wireless communication with the data projector 1 based on the connection network name and the channel used. When the connection process is completed, the network control unit 207 receives RGB signals from the CPU 209 and supplies them to the attached communication device 3.

  The RAM 208 is for storing data necessary for the operation of the CPU 209. The CPU 209 controls each part of the computer 2.

  Specifically, the CPU 209 controls the network control unit 207 to read out communication setting information from the communication device 3 when the communication device 3 is attached to the computer 2.

  Then, the CPU 209 stores the communication setting information read by the network control unit 207 in the storage device 203.

  When a transmission command is transmitted from the input device 202, the CPU 209 reads communication setting information from the storage device 203 and supplies it to the network control unit 207. The CPU 209 reads RGB data from the VRAM 205 via the video adapter 204 and supplies the RGB signal to the network control unit 207.

Next, the operation of the projection system according to the first embodiment will be described.
When the RGB signal is not transmitted from the computer 2 to the data projector 1, the communication device 3 is attached to the data projector 1.

  When the communication device 3 is attached to the data projector 1, the CPU 109 and the network control unit 111 execute the communication setting process (1) according to the flowchart shown in FIG.

  That is, the CPU 109 reads the connection network name of the data projector 1 from the memory 106 (step S11).

  The CPU 109 supplies the read connection network name of the data projector 1 to the network control unit 111 (step S12).

The network control unit 111 stores the supplied connection network name in the memory 302 of the communication device 3 (step S13).
The network control unit 111 selects a use channel (step S14).

  The network control unit 111 stores information on the selected used channel in the memory 302 of the communication device 3 (step S15). Further, the memory 106 also stores information on the used channel.

  When the computer 2 transmits RGB signals to the data projector 1, the communication device 3 is attached to the computer 2.

  When the communication device 3 is attached to the computer 2, the CPU 209 and the network control unit 207 of the computer 2 execute the communication setting process (2) according to the flowchart shown in FIG.

  That is, the network control unit 207 reads the communication setting information from the memory 302 of the communication device 3 (Step S21).

  The network control unit 207 supplies the read communication setting information to the CPU 209 (step S22).

  The CPU 209 stores the supplied communication setting information in the storage device 203 (step S23).

Next, the communication setting process will be specifically described.
For example, as shown in FIG. 4, it is assumed that the data projector 1 and the computers 21 to 23 are devices capable of wireless communication. The computers 21 to 23 have the same configuration as the computer 2 shown in FIG.

  If the connection network name of the data projector 1 is “DJ1”, the memory 106 of the data projector 1 stores this connection network name “DJ1” in advance.

  When the RGB signals are not transmitted from the computers 21 to 23 to the data projector 1, the communication device 3 is attached to the data projector 1 as shown in FIG. In this case, the CPU 109 reads out the connection network name “DJ1” from the memory 106 and supplies it to the network control unit 111 (processing in steps S11 and S12).

  The network control unit 111 stores the supplied connection network name “DJ1” in the memory 302 of the communication device 3 (processing in step S13).

  For example, when the channel “CH1” can be used as a wireless communication channel, the network control unit 111 selects the channel “CH1” as the use channel, and uses the use channel information “CH1” in the memory of the communication device 3. 302 (processing in steps S14 and S15). The memory 106 also stores this used channel information “CH1”.

  When transmitting RGB signals from the computer 22 to the data projector 1, the communication device 3 is mounted on the computer 22 as shown in FIG. 5.

  When the communication device 3 is attached to the computer 22, the network control unit 207 of the computer 22 reads the connection network name “DJ1” and the used channel information “CH1” from the memory 302 of the communication device 3 (processing in step S21). ).

  Then, the network control unit 207 supplies the read connection network name “DJ1” and used channel information “CH1” to the CPU 209 (step S22).

  The CPU 209 stores the connection network name “DJ1” and the used channel “CH1” in the storage device 203 (processing in step S23). In this way, the memory 106 of the data projector 1 and the storage device 203 of the computer 22 store the same communication setting information.

  Next, the CPU 209 reads data from the storage device 203 and writes the RGB data read via the video adapter 204 to the VRAM 205.

  The display device 206 acquires RGB data written in the VRAM 205 via the video adapter 204, and displays an image based on the acquired RGB data.

  When the user inputs this RGB data transmission command to the input device 202, the input device 202 responds and transmits this transmission command to the CPU 209.

  When acquiring this transmission command, the CPU 209 reads out the connection network name “DJ1” and the used channel information “CH1” as the communication setting information from the storage device 203 and supplies them to the network control unit 207.

  The network control unit 207 identifies the data projector 1 according to the connection network name “DJ1”, and sets the channel “CH1” to be used based on the channel “CH1”. Then, the network control unit 207 executes wireless communication connection processing with the data projector 1.

  When the connection between the communication apparatus 3 and the data projector 1 is established by wireless communication, the CPU 209 reads the designated RGB data from the VRAM 205 via the video adapter 204. The CPU 209 supplies the read RGB data to the network control unit 207 as an RGB signal.

  The network control unit 207 receives the RGB signal from the CPU 209 and supplies the received RGB signal to the communication device 3.

  The communication unit 303 of the communication device 3 transmits the supplied RGB signal to the data projector 1 using the channel “CH1”. In this way, the computer 22 supplies RGB signals to the data projector 1.

Next, the communication unit 112 of the data projector 1 receives the RGB signal transmitted from the communication device 3 attached to the computer 22.
The network control unit 111 supplies the RGB signal received by the communication unit 112 to the CPU 109.

  The CPU 109 causes the display unit 103 to display an image based on the RGB signals. Then, the CPU 109 supplies the RGB signal to the projection apparatus 101, and the projection apparatus 101 projects an image on the screen 4 based on the RGB signal.

  When the image projected on the screen 4 is distorted, the image processing unit 102 performs trapezoidal distortion correction on this image.

  Then, the CPU 109 supplies the data subjected to the trapezoidal distortion correction by the image processing unit 102 to the projection device 101 again, and the projection device 101 projects the corrected image on the screen 4.

  As described above, according to the first embodiment, the network control unit 111 of the data projector 1 writes the communication setting information of the data projector 1 in the memory 302 of the communication device 3. The computer 2 reads out the communication setting information from the memory 302 and stores it. When the RGB signal is transmitted to the data projector 1, the data projector 1 and the computer 2 perform communication settings according to the communication setting information, and the data projector 1 receives the RGB signal by wireless communication.

  Therefore, by simply replacing the communication device 3 from the data projector 1 to the computer 2, communication setting by wireless communication can be performed without any special setting by the user, and communication setting can be easily performed even for beginners.

(Embodiment 2)
The projection system according to Embodiment 2 is configured such that a communication device is connected to a computer via an RGB cable.

FIG. 6 shows the configuration of the projection system according to the second embodiment.
The computer 2 includes an RGB terminal 211. The RGB terminal 211 is generally provided in the computer 2 and is a terminal for inputting and outputting RGB signals. The RGB terminal 211 is connected to the video adapter 204.

  The communication device 3 includes an RGB terminal 311, an A / D conversion unit 312, a compression unit 313, and a secondary battery 314.

  The RGB terminal 311 is a terminal to which the RGB cable 5 is connected. The RGB cable 5 is a data line for receiving RGB signals from the computer 2.

  The A / D conversion unit 312 converts an analog RGB signal received via the RGB cable 5 and the RGB terminal 311 into a digital signal.

  The compression unit 313 compresses the digital signal converted by the A / D conversion unit 312 and supplies the compressed digital signal to the communication unit 303.

  The secondary battery 314 is for supplying power necessary for wireless communication to the communication unit 303. The secondary battery 314 is provided because the RGB cable 5 has no power supply line.

  As shown in FIG. 7, the data projector 1 includes a power supply unit 121 and a charger 122.

  The power supply unit 121 is for supplying AC power to the data projector 1 when AC power is supplied from an AC power source (not shown).

  The charger 122 is for supplying power from the power supply unit 121 to charge the secondary battery 314 of the communication device 3. When the communication device 3 is attached to the data projector 1, the charger 122 supplies current to the secondary battery 314 via the connection terminal 110 of the data projector 1 and the connection terminal 301 of the communication device 3, and the secondary battery. 314 is charged.

Next, the operation of the projection system according to the second embodiment will be described.
When the RGB signal is not transmitted from the computer 2 to the data projector 1, the connection terminal 301 of the communication device 3 is connected to the connection terminal 110 of the data projector 1.

  The network control unit 111 stores the communication setting information supplied from the CPU 109 in the memory 302 of the communication device 3 as in the first embodiment.

  The charger 122 is supplied with electric power from the power supply unit 121, supplies current to the secondary battery 314 via the connection terminal 110 of the data projector 1 and the connection terminal 301 of the communication device 3, and charges the secondary battery 314. .

  When the RGB signal is transmitted from the computer 2 to the data projector 1, the RGB terminal 311 of the communication device 3 is connected to the RGB terminal 211 of the computer 2.

  When the communication device 3 is attached to the computer 2, the CPU 209 reads communication setting information from the memory 302 of the communication device 3 via the RGB terminal 311, the RGB cable 5, the RGB terminal 211, and the video adapter 204, and the storage device 203.

  The CPU 209 performs communication settings based on the communication setting information stored in the storage device 203. When connection by wireless communication is performed, the CPU 209 supplies RGB data stored in the VRAM 205 as RGB signals to the communication device 3 via the video adapter 204, the RGB terminal 211, and the RGB cable 5.

  The A / D conversion unit 312 of the communication device 3 receives an analog RGB signal via the RGB terminal 311 and converts the RGB signal into a digital signal.

  The compression unit 313 compresses the digital signal converted by the A / D conversion unit 312 and supplies the compressed digital signal to the communication unit 303.

  The communication unit 303 receives power necessary for transmission from the secondary battery 314 and transmits the digital signal supplied from the compression unit 313 to the data projector 1.

  As described above, according to the second embodiment, the communication device 3 is connected to the computer 2 via the RGB cable 5, and the CPU 209 of the computer 2 acquires communication setting information via the RGB cable 5, and RGB A signal is supplied to the communication device 3. In addition, the charger 122 of the data projector 1 charges the secondary battery 314 of the communication device 3 when the communication device 3 is attached to the data projector 1.

  Therefore, the computer 2 can acquire communication setting information via the generally provided RGB terminal 211, and can supply RGB signals from the computer 2 to the data projector 1.

In carrying out the present invention, various forms are conceivable and the present invention is not limited to the above embodiment.
For example, as shown in FIG. 8, the RGB signal can be transmitted from the computer 2 to the data projector 1 in a state where the communication device 3 is attached to the data projector 1. In this case, the data projector 1 includes a connection detection unit 131 and an RGB terminal 132.

  The connection detection unit 131 detects whether or not the communication device 3 is attached. When the communication device 3 is attached to the data projector 1, the connection detection unit 131 transmits an attachment detection signal indicating the attachment of the communication device 3 to the CPU 109. .

  The RGB terminal 132 is a terminal for connecting to the RGB cable 5, and the RGB cable 5 is connected to enable input of RGB signals. The RGB terminal 132 is connected to the image processing unit 102.

  If the CPU 109 does not receive an attachment detection signal from the connection detection unit 131, the CPU 109 performs wireless communication with the communication device 3 and receives RGB signals as in the first embodiment.

  On the other hand, when receiving a mounting detection signal from the connection detection unit 131, the CPU 109 controls the image processing unit 102 so that the image processing unit 102 acquires RGB signals via the RGB terminal 132.

  As shown in FIG. 9, the data projector 1 may further include a secondary battery 123 and a charger 124. In this case, the charger 124 is supplied with power from an external power supply different from the power supply unit 121 for the data projector 1 to charge the secondary battery 123, and the charger 121 is supplied with power from the secondary battery 123. Then, the secondary battery 314 of the communication device 3 is charged.

  Next, in the above embodiment, it is assumed that the communication setting information is stored in advance in the memory 106 of the data projector 1. However, the communication setting information can be written or rewritten on the data projector 1 side.

  In this case, communication setting information is input from the input device 104 of the data projector 1 or the remote controller.

  In the above embodiment, the data projector 1 stores the connection network name and channel information in the memory 302 of the communication device 3 as communication setting information. However, the communication setting information is not limited to this. For example, the wireless LAN communication standard to be used, the presence / absence of encryption information, the decryption key information encrypted to prevent eavesdropping, the password, etc. It may be included. Further, the communication setting information may include control information for remotely operating the data projector 1 such as on / off information of the data projector 1.

  Next, the network control unit 111 and the image processing unit 102 of the data projector 1 and the network control unit 207 of the computer 2 may be configured by hardware or software.

  Next, in the above embodiment, the data processing apparatus has been described as the data projector 1. However, the data processing apparatus is not limited to this, and may be a terminal having the same configuration as the computer 2, for example. The computer 2 may also be a mobile terminal.

It is a block diagram which shows the structure of the projection system which concerns on Embodiment 1 of this invention. 6 is a flowchart showing a communication setting process (1) executed by the data projector when the communication device shown in FIG. 1 is attached to the data projector. It is a flowchart which shows the communication setting process (2) which a computer performs when the communication apparatus shown in FIG. 1 is mounted | worn with a computer. It is a figure which shows the specific example when the communication apparatus shown in FIG. 1 is mounted | worn with the data projector. It is a figure which shows the specific example when the communication apparatus shown in FIG. 1 is connected to the computer. It is a block diagram which shows the structure of a computer and a communication apparatus as a projection system which concerns on Embodiment 2 of this invention. It is a block diagram which shows the structure of a data projector and a communication apparatus as a projection system which concerns on Embodiment 2 of this invention. 6 is a block diagram showing an application example (1) of the data projector according to the first embodiment. FIG. 6 is a block diagram illustrating an application example (2) of the data projector according to the first embodiment. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Data projector, 2 ... Computer, 3 ... Communication apparatus, 101 ... Projection apparatus, 106 ... Memory, 109 ... CPU, 111 ... Network control part, 207 ... Network control unit, 209 ... CPU, 302 ... memory, 303 ... communication unit

Claims (4)

In a data projector that receives data by wireless communication from a terminal, performs image processing of received data, and projects an image on a projection surface.
A main body storage unit for storing communication setting information necessary for wireless communication;
It has a plurality of keys, and is a communication setting information stored in the main body storage unit by operating these keys, a connection network name for identification in a wireless communication network and information on a channel used for wireless communication An input unit capable of inputting rewrite information;
A storage control unit that has a wireless communication function and is equipped with a removable communication device equipped with a storage unit, and stores communication setting information stored in the main body storage unit in the storage unit of the communication device;
When the communication device is attached to the terminal, wireless communication is performed with the communication device according to communication setting information stored in the main body storage unit and the storage unit of the communication device, and data is transmitted from the terminal. A communication unit for receiving,
A data projector characterized by that. The main body storage unit is composed of a rewritable nonvolatile memory.
The data projector according to claim 1. The communication device
Connected to the terminal via a data line for receiving data,
A transmission unit for transmitting data supplied from the terminal via the data line by wireless communication;
A secondary battery that supplies power necessary for wireless communication to the transmitter, and
A charging unit for charging a secondary battery of the communication device when the communication device is mounted;
The data projector according to claim 1, wherein the data projector is a data projector. In a projection system that includes a data projector, a terminal, and a communication device, receives data wirelessly transmitted from the terminal via the communication device, performs an imaging process on the received data, and projects an image on a projection surface ,
The communication device is detachable from the data projector and the terminal, has a wireless communication function and a storage unit,
The data projector is
A main body storage unit for storing communication setting information necessary for wireless communication;
It has a plurality of keys, and is a communication setting information stored in the main body storage unit by operating these keys, a connection network name for identification in a wireless communication network and information on a channel used for wireless communication An input unit capable of inputting rewrite information;
A storage control unit that stores communication setting information stored in the main body storage unit in the storage unit of the communication device when the communication device is mounted;
When the communication device is attached to the terminal, wireless communication is performed with the communication device according to communication setting information stored in the main body storage unit and the storage unit of the communication device, and data is transmitted from the terminal. A communication unit for receiving,
A projection system characterized by that .

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