JP5033570B2 - Projection-type image display system and projection-type image display device used therefor - Google Patents

Description

  The present invention relates to a projection video display system that transmits image data from an information processing device such as a PC (personal computer) to a projection video display device such as a liquid crystal projector and projects the enlarged image, and a projection video display device used therefor It is.

As this type of prior art, for example, Patent Document 1 discloses an input processing unit that stores image data supplied from an information processing apparatus such as a PC in a RAM to generate a frame image, and a frame image from the RAM. An output processing unit that reads and outputs the image data, and when image data is supplied from the PC, the input processing unit is detected to generate a frame image, and in other cases, the input processing unit is driven. A projector system and a projector for stopping are disclosed.
JP 2004-177784 A

  However, the prior art as disclosed in Patent Document 1 does not automatically operate the projector by checking the state of the projector (projection-type video display device) itself from a PC (information processing device). For this reason, when the user starts / stops using the PC, the projector cannot be automatically turned on / off or switched, and the projector itself must be operated. Operation was troublesome.

  Accordingly, the present invention has been made to solve such problems, and a projection image display system capable of eliminating the troublesomeness of user operations at the start / end of use and a projection image display used therefor The object is to provide an apparatus.

  In order to achieve the above object, the invention according to claim 1 of the present application provides a projection image display system in which image data is transmitted from an information processing device to a projection image display device via a network and enlarged and projected. When the image transmission operation is performed on the information processing apparatus side, the projection display apparatus is turned on, and the input switching of the projection display apparatus is set to the network image display mode state. When image data is transmitted from the information processing apparatus to the projection display apparatus, and image transmission operation is stopped on the information processing apparatus side, image data transmission to the projection display apparatus is stopped, and The projection display apparatus is turned off.

  The invention according to claim 2 is a projection display apparatus used in the projection display system according to claim 1, wherein a predetermined state of the own apparatus is changed in response to a predetermined state inquiry from the information processing apparatus. A state confirmation unit for confirming, a state data transmission unit for transmitting state data obtained by the state confirmation unit to the information processing device, and a predetermined request operation in response to a predetermined operation request from the information processing device And a request operation executing means.

  According to the first aspect of the present invention, it is confirmed whether or not the projection display apparatus is turned on via the network based on the image transmission operation on the information processing apparatus side, and the power is turned on. When it is confirmed that the projection type video display device is turned on, the projection type video display device is turned on, and it is confirmed that the power source is turned on, or after the power is turned on, image data is output from the information processing device. When the user starts using the information processing apparatus, the projector automatically checks the power-on state of the projection display apparatus. If the power is not turned on, the user turns on the power and transmits the image data. Therefore, the troublesome user operation at the start of use can be eliminated.

  According to the second aspect of the present invention, the projection type image display apparatus is obtained by the state confirmation unit for confirming the predetermined state of the own apparatus in response to the predetermined state inquiry from the information processing apparatus, and the state confirmation unit. The above-described effects are provided with status data transmitting means for transmitting the status data to the information processing apparatus and request operation executing means for executing a predetermined request operation in response to a predetermined operation request from the information processing apparatus. Can be realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a system configuration diagram showing a schematic configuration of an embodiment of a projection image display system according to the present invention.

  The projection display system according to the present embodiment is connected to the PC 1 via a PC (Personal Computer) 1 widely used as a small-sized and general-purpose information processing apparatus and a network 2 such as a wireless local area network (LAN). It is composed of a liquid crystal projector 3 as a possible projection display apparatus.

  FIG. 2 is a block diagram showing the configuration of the PC 1 mainly related to the projection display system. The PC 1 is connected to a CPU (Central Processing Unit) 11 that controls the entire PC 1 and implements various means according to the present invention by executing processes shown in flowcharts to be described later, and the CPU 11 via the bus 12. An HDD (Hard Disk Drive) 13, a RAM (Random-Access Memory) 14, a liquid crystal display 15, a network communication unit 16, and the like are included.

  The HDD 13 stores programs executed by the CPU 11 such as an OS (Operating System) and various application software. The RAM 14 is used as a work RAM when the CPU 11 executes a program, and is also used as a storage area for capture data obtained by capturing a display image on the liquid crystal display 15. The network communication unit 16 connects the PC 1 to a network 2 such as a wireless LAN to enable network communication.

  FIG. 3 is a block diagram showing a configuration of the liquid crystal projector 3 mainly relating to the projection type video display system. The liquid crystal projector 3 controls the entire liquid crystal projector 3 and implements various means according to the present invention by executing processing shown in a flowchart described later, and a ROM (connected to the CPU 31 via the bus 32 ( It comprises a read-only memory (33), a RAM 34, a USB (Universal Serial Bus) connector 35, a power supply control circuit 36, a network communication unit 37, a liquid crystal panel 38, and the like.

  The ROM 33 stores programs executed by the CPU 31, network setting data such as IP (Internet Protocol) address information necessary for network connection, and the like. The RAM 34 is used as a working RAM when the CPU 31 executes a program, and is also used as a drawing RAM for storing image data from the PC 1 or the like for drawing. The USB connector 35 is a general-purpose connection unit that can connect various peripheral devices such as a USB memory. The power control circuit 36 controls power on / off and power supply to each part of the apparatus. The network communication unit 37 connects the liquid crystal projector 3 to the network 2 such as a wireless LAN to enable network communication. The liquid crystal panel 38 is disposed as an optical modulation element in an optical system (not shown), and displays a projection image based on image data read from the drawing RAM of the RAM 34.

  FIG. 4 is a flowchart showing the operation of the PC 1 according to the present invention, which is executed by the CPU 11.

  When the process shown in the flowchart of FIG. 4 is started, first a user operation waiting state is entered (N loop in step S101). When there is a user operation from this waiting state for user operation (Y in step S101), and the image transmission button by the PC application is pressed and a request for transmission of the PC display image is made (Y in step S102), first, the application sends the projector 3 to the projector 3. Then, a power ON confirmation request is made (step S103). If an operation other than pressing the image transmission button is performed, processing corresponding to the operation is performed and the process returns to the user operation waiting state (N in step S102 → step S104 → step S101).

  If the projector 3 is not turned on in step S103, a power-on request command is issued to the projector 3 to turn on the projector 3 (N in step S103 → step S105). Thereafter, the input switching state of the projector 3 is confirmed, and it is confirmed whether or not the input switching is in a mode for displaying a network image (step S106). If the input switching is not in the network image display mode, a command for switching the input switching to the network image display mode is issued, and the setting of the input switching of the projector 3 is changed to the mode for displaying the network image (N in step S106). → Step S107). If the power is already turned on when the power is turned on (Y in step S103) or if the input mode is the network image display mode when checking the input switching state (Y in step S106), the command is not issued. The process proceeds to the next process as it is.

  After the above processing is completed, the image data obtained by capturing the PC display image is transmitted to the projector 3 via the network 2 (step S108), and the projector 3 enlarges and projects the PC display image on the screen.

  When the above image transmission is being performed, it is confirmed whether or not an image transmission end request has been made by a user operation while performing image transmission (N in step S109 → loop in step S108). Then, when the image transmission stop button by the PC application is pressed and a termination request is made, the image transmission to the projector 3 is terminated (Y in step S109 → step S110), and the projector 3 is confirmed to be turned off ( Step S111).

  When the power of the projector 3 is turned off, the state transits to the waiting state for the user operation as it is (Y in step S111 → step S101), but when the power of the projector 3 remains on, the power to the projector 3 is turned on. After issuing a request command to turn off the projector 3 and turning off the power of the projector 3, a transition is made to a waiting state for a user operation (N in step S111 → step S112 → step S101).

  Thereby, the user can enlarge and project the PC display image from the projector 3 and display it on the screen without being conscious of the power supply state or the input switching state of the projector 3.

  FIG. 5 is a flowchart showing the operation of the projector 3 according to the present invention, which is executed by the CPU 31. Note that the processing shown in this flowchart is configured to be executed with standby power even when the projector 3 is not powered on.

  When the processing shown in the flowchart of FIG. 5 is started, first, a command reception waiting state from the PC 1 is entered (N loop of step S201). When a predetermined command is received from the PC 1 in this command reception waiting state (Y in step S201), first, whether or not the received command is a predetermined state inquiry (power ON / OFF confirmation request or input switching state confirmation request). Is checked (step S202).

  If the command received from the PC 1 is a predetermined status inquiry, the status of the apparatus (projector 3) is checked in response to the inquiry content (power ON / OFF confirmation request or input switching status confirmation request) (Y in step S202). → Step S203). Status data obtained by this status confirmation (specifically, data indicating whether the power is turned on or off or input switching is in the network image display mode) is transmitted to the PC 1 via the network 2 and is in a command reception waiting state. (Step S204 → Step S201).

  On the other hand, if the command received from the PC 1 is not a status inquiry (N in step S202), the process proceeds to step S205, and a predetermined projector operation request (a power ON / OFF request command or a command to set input switching to the network image display mode). If it is a predetermined projector operation request, the requested operation, that is, the power is turned ON / OFF or the input switching is set to the network image display mode to return to the command reception waiting state (Y in step S205) Step S206 → Step S201).

  As described above, according to the present embodiment, when the user wants to enlarge and project a PC display image from the projector 3 and display it on the screen, the power ON operation of the projector 3 and the input switching state are set to the network image display mode. Annoying prior operations such as switching are not required, so that troublesome user operations at the start of use can be eliminated, and display can be performed by one-button operation from the PC 1 without worrying about the power supply state or the input switching state. It becomes possible.

  Furthermore, since it is possible to turn off the power of the projector 3 only by an end button operation from the PC 1, the troublesome user operation at the end of use can be eliminated. Further, there is an advantage that a portable projector or the like can be carried immediately after the image display end operation without turning off the power.

  In the above-described embodiment, it is possible to eliminate the troublesome user operation at the start of use even when input switching is necessary in response to input switching. In the case where the network image display mode is always set, the present invention can be implemented without corresponding to input switching.

  In the above embodiment, a liquid crystal projector using a liquid crystal panel as a light modulation element is shown as a projection display apparatus. However, the present invention is also applied to a projection display apparatus having another image light generation system. Can do. That is, the present invention can be applied to a projector such as a DLP (Digital Light Processing; registered trademark of Texas Instruments (TI)) system. In addition to the front projection type, the present invention can be applied to a rear projection type image display apparatus.

1 is a system configuration diagram showing a schematic configuration of an embodiment of a projection image display system according to the present invention. The block diagram which shows the structure which mainly concerns on a projection type video display system of PC. The block diagram which shows the structure which mainly concerns on a projection type video display system of a liquid crystal projector. The flowchart which shows the operation | movement which concerns on this invention of this PC. 6 is a flowchart showing the operation of the liquid crystal projector according to the present invention.

Explanation of symbols

1 PC
11 CPU
12 bus 13 HDD
14 RAM
15 liquid crystal display 16 network communication unit 2 network 3 liquid crystal projector 31 CPU
32 bus 33 ROM
34 RAM
35 USB connector 36 Power control circuit 37 Network communication unit 38 LCD panel

Claims (2)

In the projection display system in which an image data from the information processing apparatus is enlarged and projected it is transmitted to the projection display apparatus via the network,
When an image transmission operation is performed on the information processing apparatus side, the projection video display apparatus is turned on, and input switching of the projection video display apparatus is set in a network image display mode, so that the information Image data is transmitted from the processing device to the projection display device,
When the image transmission operation is stopped on the information processing apparatus side, image data transmission to the projection display apparatus is stopped and the power of the projection display apparatus is turned off. Video display system. A projection display apparatus used in the projection display system according to claim 1,
  State confirmation means for confirming a predetermined state of the own apparatus in response to a predetermined state inquiry from the information processing apparatus; and state data transmission means for transmitting state data obtained by the state confirmation means to the information processing apparatus; And a requested operation execution means for executing a predetermined requested operation in response to a predetermined operation request from the information processing apparatus.