JP5658482B2 - Display device and program - Google Patents

Description

The present invention relates Viewing apparatus.

  In recent years, projectors have been widely used for presentations. Since projectors can enlarge and project presentation materials and the like on a screen, they are often used in conferences and workshops where many people participate. A general usage form of a projector is to connect a personal computer (PC) and a projector so that they can communicate with each other, and transmit a display screen of the PC to the projector for display. Some projectors can be connected to a built-in or removable recording medium.

  Recently, a PC and a projector may be connected by a communication network such as a LAN. In this case, since the PC and the projector can bidirectionally communicate data other than the display screen, for example, the PC can access a recording medium connected to the projector.

  When the PC accesses the recording medium of the projector and displays a screen (for example, a file list) corresponding thereto, this screen is also projected by the projector. However, the recording medium may contain confidential information that is not intended to be shown to the audience. Therefore, there is a need for a technique that suppresses erroneous projection of confidential information and the like.

  Patent Document 1 is known as a technique for suppressing erroneous projection of confidential information and the like. According to Patent Document 1, when the attribute information indicating confidential information is included in the header portion of the file, or when characters or images indicating confidential information are included in the file contents In addition, the projector is prohibited from projecting the contents of the file.

JP 2004-185568 A

  When using the technique of Patent Document 1, it is necessary to set in advance information indicating confidential information in the header portion and contents of a file. However, such setting work is burdensome for the user (especially when the number of files is large).

  In addition, since the technique of Patent Document 1 does not handle the case where confidential information is included in information (for example, file name) related to the content itself of the recording medium, information indicating a list of contents recorded on the recording medium Projection of (for example, a file list) cannot be suppressed.

The present invention has been made in view of such a situation, and it is possible to suppress unintended display of information about a list of contents recorded on a recording medium connected to a display device such as a projector. Objective.

One of the display devices according to the present invention includes a receiving unit that receives image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording unit, and the external device A list of contents recorded in the recording means when the display means performs processing for displaying image data transmitted from the external device and display means for displaying image data transmitted from the external device. When a request for acquiring information used for displaying the image is received from the external device, the image data transmitted from the external device and a list of contents recorded in the recording unit And control means for performing control so that information including information is not displayed on the display means .
One of the display devices according to the present invention includes a receiving unit that receives image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording unit, and the external device A list of contents recorded in the recording means when the display means performs processing for displaying image data transmitted from the external device and display means for displaying image data transmitted from the external device. When a request for acquiring information used to display the image is received from the external device, a part of the image data transmitted from the external device and recorded in the recording unit And control means for performing control for making it difficult to visually recognize a portion corresponding to the information about the list.
One of the programs according to the present invention includes: a receiving unit that receives image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording unit; Display means for displaying image data transmitted from an external device, and content recorded in the recording means when the display means performs processing for displaying image data transmitted from the external device When a request for acquiring information used to display a list of images is received from the external device, a list of contents that are image data transmitted from the external device and recorded in the recording unit Is a program for functioning as control means for performing control to prevent information including information on the display means from being displayed on the display means. .
One of the programs according to the present invention includes: a receiving unit that receives image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording unit; Display means for displaying image data transmitted from an external device, and content recorded in the recording means when the display means performs processing for displaying image data transmitted from the external device When a request for acquiring information used to display the list of images is received from the external device, it is part of the image data transmitted from the external device and recorded in the recording means It is a program for functioning as control means for performing control for making it difficult to visually recognize a portion corresponding to information about a list of contents.

According to the present invention, it is possible to suppress unintended display of information about a list of contents recorded on a recording medium connected to a display device such as a projector.

Schematic which shows the usage type of the projector 11 which concerns on 1st Embodiment. The block diagram which shows the detailed structure of the projector 11 The figure which shows the example of a display when content information (information which shows the list of contents) is displayed on the display screen 17 of PC13. The flowchart which shows the flow of operation | movement of the projector 11 and PC13 based on 1st Embodiment. The flowchart which shows the flow of operation | movement of the projector 11 and PC13 based on 2nd Embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The technical scope of the present invention is determined by the claims, and is not limited by the following individual embodiments. In addition, not all combinations of features described in the embodiments are essential to the present invention.

[First Embodiment]
Hereinafter, embodiments in which the display device of the present invention is applied to a projector will be described. FIG. 1 is a schematic diagram showing a usage pattern of the projector 11 according to the first embodiment. In FIG. 1, a projector 11 and a personal computer (PC) 13 which is an example of an external device are a wired LAN such as Ethernet (registered trademark), a wireless LAN such as IEEE802.11b or Bluetooth (registered trademark), or a public line. Or the like via the network 14. Another information terminal device may be used instead of the PC 13. The display screen 17 of the PC 13 is transferred to the projector 11 as screen data for each sheet and enlarged and projected on the screen 15.

  The PC 13 stores an application for generating screen data representing the display screen 17 (for example, JPEG image data), and this application is unaware of whether or not the display screen 17 includes presentation material. Further, the projector 11 stores an application for converting received screen data into display data, and this application is unaware of whether the received screen data includes presentation material.

  The projector 11 and the recording medium 12 are connected by a cable 16 of various standards such as a USB cable and an IEEE1394 cable. The recording medium 12 is composed of a hard disk, a flash memory, or the like. Alternatively, the recording medium 12 may include a secondary storage device such as a magneto-optical disk, a CD-ROM, a CD-RW, or a DVD-ROM. The recording medium 12 may be inside or outside the projector 11.

  A user who makes a presentation creates a presentation material on the PC 13 or acquires it from the recording medium 12 via the projector 11. In FIG. 1, the recording medium 12 and the PC 13 are connected to the projector 11 one by one, but the number of connected recording media and PCs is not limited to one and may be any number.

  Next, a detailed configuration of the projector 11 will be described with reference to FIG. In FIG. 2, the same or similar components as those in FIG. Each processing unit in the projector 11 is connected to be communicable with each other via a system bus 21.

  The operation unit 22 includes buttons, a touch panel, and the like, and the user can perform operations such as turning on / off the power of the projector 11 and various settings of the projector 11 via the operation unit 22. The operation signal receiving unit 23 receives an operation command of the projector 11 from the remote controller 50 attached to the projector 11 by infrared communication.

  The display unit 24 displays (projects) the screen data received from the system bus 21 (strictly, display data generated from the screen data) on the screen 15. The control unit 25 switches ON / OFF of screen display on the display unit 24, projects screen data of the display screen 17 of the PC 13, an image stored in advance in the recording medium 12, or the like on the display unit 24, The display unit 24 is controlled such as projecting the above message on the display unit 24. The control unit 25 controls data communication between the projector 11 and the PC 13, between the projector 11 and the recording medium 12, a control command received from the PC 13, or an operation command from the operation unit 22 or the operation signal receiving unit 23. The projector 11 is also controlled accordingly.

  The communication unit 26 receives screen data from the PC 13 and transmits / receives control commands for establishing connection with the PC 13 and transferring screen data. The connection unit 27 includes various interfaces for connecting the projector 11 and the recording medium 12. The storage unit 28 stores screen data received from the PC 13. The image processing unit 29 performs various image processing on the screen data of the PC 13 stored in the storage unit 28. The image processing unit 29 also functions as an image recognition unit, performs pattern recognition, character recognition, and the like, and identifies an object that exists in the screen data.

  FIG. 3 is a diagram illustrating a display example when content information (information indicating a list of content) is displayed on the display screen 17 of the PC 13. When the PC 13 transmits an acquisition request for content information recorded in the recording medium 12 to the projector 11, the projector 11 acquires content information in the recording medium 12 and transmits it to the PC 13. The transmitted content information is displayed in the window 31 generated on the display screen 17 (see content information 32). At this time, when the display screen 17 is projected from the projector 11, there is a possibility that the content information 32 may be seen by the audience, and there is a problem when confidential information is included in the content information 32. . Therefore, the projector 11 suppresses display (projection) of the content information 32 by performing display control described in detail below.

  FIG. 4 is a flowchart showing a flow of operations of the projector 11 and the PC 13 according to the first embodiment. In FIG. 4, the operation flow of the projector 11 is shown on the left side, and the operation flow of the PC 13 is shown on the right side.

  In S 401 and S 402, the projector 11 and the PC 13 establish a connection via the network 14. An example of processing for establishing a connection includes the projector 11 and the PC 13 joining the network 14, and the PC 13 transmitting a connection request to the projector 11.

  In S403, the PC 13 starts transmitting screen data to the projector 11, and in S404, the projector 11 starts displaying (projecting) the screen data received from the PC 13. In the projector 11, the screen data is received via the communication unit 26, and the screen data is projected by the display unit 24. The processing in S403 and S404 may include that the PC 13 transmits a screen data transmission request command to the projector 11, or the projector 11 transmits a screen data transmission permission command to the PC 13 in response thereto. .

  In S <b> 413, the projector 11 waits until a content information acquisition request is received from the PC 13 via the communication unit 26. When the PC 13 transmits a content information acquisition request to the projector 11 in S414, the processing of the projector 11 proceeds to S415.

  Here, the content information acquisition request is an information acquisition request indicating a list of contents recorded on the recording medium 12. Specific examples of the content information acquisition request include an acquisition request for list information of files stored in a specific folder of the recording medium 12, an acquisition request for a music playlist, and the like. Whether or not the content information acquisition request has been received is determined by the control unit 25 of the projector 11 according to a predetermined standard defined in advance. For example, information indicating a command format is recorded in the ROM (not shown) of the control unit 25, and the control unit 25 receives a content information acquisition request when receiving a command of this format from the PC 13. to decide. Alternatively, the ROM (not shown) of the control unit 25 stores a list of file extensions that hold the playlist, and the content information when an access request for the file having this extension is received from the PC 13. It is determined that an acquisition request has been received.

  In S415, the control unit 25 of the projector 11 advances the process to S416, S417, or S418 in accordance with a display control mode set in advance via the operation unit 22 or the like. When receiving the content information acquisition request, the control unit 25 of the projector 11 according to the present embodiment performs display control so that screen data newly received from the PC 13 is not displayed in a legible state thereafter. The processes of S416, S417, and S418 are specific examples of display control. However, the display control is not limited to these, and “newly received screen data is not displayed in a legible state”. Any control is possible as long as it is present.

  In S416, the control unit 25 of the projector 11 controls the display unit 24 so as not to update the screen data being displayed. In S417, the control unit 25 of the projector 11 controls the display unit 24 to stop the display of the screen data. In step S418, the control unit 25 of the projector 11 controls the display unit 24 to display a preset image instead of the screen data received from the PC 13. For example, the preset image is recorded in the storage unit 28 or the recording medium 12.

  By the display control in S416, S417, or S418, the screen data newly received from the PC 13 is not displayed at all, so that “not displayed in a legible state” is achieved. Therefore, even if the PC 13 displays a window such as the window 31 of FIG. 3 in S420 described later, the display unit 24 of the projector 11 does not display this window), so that the confidential information included in the content information 32 is protected. Can do.

  In S419, the control unit 25 of the projector 11 acquires the content information requested by the content information acquisition request from the recording medium 12, and transmits the content information to the PC 13 via the communication unit 26. In S420, the PC 13 receives the content information and displays the received content information on its own display screen 17.

  Note that if the content information requested by the content information acquisition request is not recorded on the recording medium 12, the confidential information is not displayed, and therefore the processing of S416 to S418 can be omitted. For example, in S415, the control unit 25 of the projector 11 determines whether or not the content information requested by the content information acquisition request is recorded on the recording medium 12, and if not recorded, the processing of S416 to S418 is omitted. can do.

  Also, there is no problem if the audience sees files and folders that are not confidential information. For this reason, the secret information is set in the header of the file or folder in the recording medium 12 in advance, and only when there is a request for acquiring content information to the file or folder that is the confidential information, S416 to S418. The process may be executed.

  In step S421, the control unit 25 of the projector 11 controls the display unit 24 to display information indicating that the above-described display control is being executed. Thereby, for example, a message “Projection of screen is suspended. Please wait for a while” is projected on the screen 15.

  In step S <b> 422, the control unit 25 of the projector 11 stores the screen data newly received from the PC 13 in the storage unit 28. Then, the image processing unit 29 recognizes an image (for example, the window 31 in FIG. 3) indicating the content information included in the screen data by using an arbitrary image recognition technique such as pattern recognition or character recognition. . When the PC 13 finishes displaying the content information in S423, the image indicating the content information is not recognized in S422, and the process of the projector 11 proceeds to S424.

  In step S424, the control unit 25 of the projector 11 stops “display control for preventing newly received screen data from being displayed in a legible state”. As a result, the readable display on the display screen 17 of the PC 13 is resumed on the projector 11. Although not shown, the display control may be stopped after a predetermined time has elapsed since the display control was started in S416 to S418. In this way, the user can perform an operation necessary for protecting confidential information such as closing the window 31 while the projector 11 interrupts the display of the screen data of the PC 13. Here, by projecting the remaining time until the display of the screen data is resumed onto the screen 15 and notifying the user of the display resume time, the risk that the content information is displayed can be reduced.

  As described above, according to the present embodiment, when the projector 11 receives a content information acquisition request from the PC 13, the display control is performed so that the screen data newly received from the PC 13 is not displayed in a legible state. Run.

  Thereby, it is possible to suppress unintended display of information indicating a list of contents recorded on a recording medium connected to a display device such as a projector.

[Second Embodiment]
In the second embodiment, another example of the display control mode will be described. In S416 to S418 in FIG. 4, the display of the screen data itself is stopped so that “the newly received screen data is not displayed in a legible state”. On the other hand, in the second embodiment, the control unit 25 of the projector 11 processes the screen data newly received from the PC 13 so that it cannot be read.

  In the second embodiment, the configuration of the projector 11 is the same as in the first embodiment. FIG. 5 is a flowchart showing a flow of operations of the projector 11 and the PC 13 according to the second embodiment. In FIG. 5, the operation flow of the projector 11 is shown on the left side, and the operation flow of the PC 13 is shown on the right side. In FIG. 5, steps in which the same or similar processing as in FIG. 4 is performed are denoted by the same reference numerals, and description thereof is omitted.

  In S <b> 516, the control unit 25 of the projector 11 performs a blurring process on the screen data newly received from the PC 13. In step S517, the control unit 25 of the projector 11 performs mosaic processing on the screen data newly received from the PC 13. In S518, the control unit 25 of the projector 11 paints the screen data newly received from the PC 13 with an arbitrary color.

  In step S521, the control unit 25 of the projector 11 controls the display unit 24 to display information indicating that the above-described display control is being executed. Thereby, for example, a message “Processing and displaying the screen. Please wait for a while” is projected on the screen 15.

  In S524, the control unit 25 of the projector 11 stops “display control for preventing newly received screen data from being displayed in a legible state” (specifically, processing of the screen data).

  As described above, according to the present embodiment, when the projector 11 receives a content information acquisition request from the PC 13, the display control is performed so that the screen data newly received from the PC 13 is not displayed in a legible state. Run. Specifically, the projector 11 processes the screen data newly received from the PC 13 so that it cannot be read.

  Thereby, it is possible to suppress unintended display of information indicating a list of contents recorded on a recording medium connected to a display device such as a projector.

[Other Embodiments]
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

Claims (16)

Receiving means for receiving image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording means;
Display means for displaying image data transmitted from the external device ;
Wherein when the processing for displaying the image data transmitted from the external device is the display means is performed, for obtaining information used to display a list of contents recorded in the recording means When a request is received from the external device , image data transmitted from the external device that includes information about a list of contents recorded in the recording unit is not displayed on the display unit. Control means for performing control to
Display device characterized by having. The control means includes the display means for preventing image data transmitted from the external device including information on a list of contents recorded in the recording means from being displayed on the display means. The display device according to claim 1, wherein a process for updating the image data displayed by is not performed. In order to prevent the display unit from displaying image data transmitted from the external device including information on a list of contents recorded in the recording unit. The display device according to claim 1, wherein a process for stopping display of the image data transmitted from is performed. In order to prevent the display unit from displaying image data transmitted from the external device including information on a list of contents recorded in the recording unit. The display device according to claim 1, wherein a process for displaying other image data instead of the image data transmitted from is performed. When the display means performs processing for displaying image data transmitted from the external device, for obtaining information used to display a list of contents recorded in the recording means 5. The display device according to claim 1, wherein, when a request is received from the external device, the display unit performs processing for displaying a predetermined message. 6. When the image data transmitted from the external device does not include information about the list of contents recorded in the recording unit, the display unit displays the image data transmitted from the external device. The display device according to claim 1, wherein the process is restarted. The display means converts the image data transmitted from the external device into display data and displays the display data on a screen in order to display the image data transmitted from the external device. Item 7. The display device according to any one of Items 1 to 6. Receiving means for receiving image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording means;
Display means for displaying image data transmitted from the external device ;
Wherein when the processing for displaying the image data transmitted from the external device is the display means is performed, for obtaining information used to display a list of contents recorded in the recording means When a request is received from the external device, it is difficult to visually recognize a part of the image data transmitted from the external device and corresponding to information about a list of contents recorded in the recording unit. Control means for performing control to
Display device characterized by having. In order to make it difficult to visually recognize a part of the image data transmitted from the external device and corresponding to information about a list of contents recorded in the recording unit, the control unit 9. The blurring process is performed on a part of the image data transmitted from, which corresponds to information on a list of contents recorded in the recording unit. The display device described. In order to make it difficult to visually recognize a part of the image data transmitted from the external device and corresponding to information about a list of contents recorded in the recording unit, the control unit 9. The mosaic process is performed on a part of the image data transmitted from the image data and corresponding to the information about the list of contents recorded in the recording unit. The display device described. In order to make it difficult to visually recognize a part of the image data transmitted from the external device and corresponding to information about a list of contents recorded in the recording unit, the control unit A process for filling a part of the image data transmitted from the image data corresponding to the information about the list of contents recorded in the recording unit with a predetermined color is performed. The display device according to claim 8. When the display means performs processing for displaying image data transmitted from the external device, for obtaining information used to display a list of contents recorded in the recording means If the request is received from said external device, said display means, the display device according to Jo Tokoro message to any one of claims 8 to 11, characterized in that the process for table Shimesuru. When the image data transmitted from the external device does not include information about the list of contents recorded in the recording unit, the control unit is a part of the image data transmitted from the external device. 13. The control according to claim 8, wherein control for making it difficult to visually recognize a portion corresponding to information about a list of contents recorded in the recording unit is stopped. Display device. The display means converts the image data transmitted from the external device into display data and displays the display data on a screen in order to display the image data transmitted from the external device. Item 14. The display device according to any one of Items 8 to 13. Computer
Receiving means for receiving image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording means;
Display means for displaying image data transmitted from the external device;
When the display means performs processing for displaying image data transmitted from the external device, for obtaining information used to display a list of contents recorded in the recording means When a request is received from the external device, image data transmitted from the external device that includes information about a list of contents recorded in the recording unit is not displayed on the display unit. Control means for performing control
Program to function as. Computer
Receiving means for receiving image data transmitted from an external device capable of performing processing for displaying a list of contents recorded in the recording means;
Display means for displaying image data transmitted from the external device;
When the display means performs processing for displaying image data transmitted from the external device, for obtaining information used to display a list of contents recorded in the recording means When a request is received from the external device, it is difficult to visually recognize a part of the image data transmitted from the external device and corresponding to information about a list of contents recorded in the recording unit. Control means for performing control
Program to function as.

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