JP2016103810A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video display device capable of facilitating change in settings by a general user while preventing settings from being changed unwillingly.SOLUTION: A video display device comprises control means of performing switching between a general mode in which some of operations which can be performed for the video display device can be executed and a privilege mode which is wider in range of operation on the video display device than the general mode, on the basis of comparison between first authentication information for identifying user's authority and input second authentication information, and recording means of recording a set value of the video display device in the privilege mode as a first set value, and the control means erases a second set value as a set value of the video display device in the general mode under certain conditions, and determines the first set value read out of the recording means as a set value of the video display device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a video display device, and more particularly to a video display device having an authentication function.

  In a video display device installed in a common space such as a conference room, an unspecified number of users may operate the video display device. In such a case, the setting may be changed to a setting that does not match the intended use, and as a result, the intended video display may not be achieved and smooth progress of the conference may be hindered.

  For example, assume that a video display device installed in a conference room has been set by a user to automatically turn off the video display device at a predetermined time. When a user who does not know this is holding a conference using the video display device, the video display device is suddenly turned off despite the conference.

  In view of such circumstances, there is known a video display device that prevents the unspecified user from using the video display device or changes the setting by giving the video display device user authentication. Yes.

  Patent Document 1 discloses a projector in which a light source is not turned on unless a predetermined predetermined operation button is pressed in the correct order and then the power is turned on.

  Patent Document 2 discloses a projector that determines the authority level of a user by authentication using a password and permits only an operation according to the authority level.

JP 2005-338604 A JP 2006-235000 A

  However, in the prior art disclosed in the above-mentioned Patent Document 1, in order to change the setting, it is necessary to successfully authenticate and start the video display device. A user who does not know the authentication method (hereinafter referred to as a general user) needs to inquire of a user who knows the authentication method (hereinafter referred to as a privileged user).

  Moreover, in the prior art disclosed in the above-mentioned Patent Document 2, when it is desired to change the setting according to the number of participants in the conference and the form of the conference, if the setting items that cannot be operated by general users are included, the setting is immediately made. It couldn't be changed and it was necessary to contact privileged users as well.

  In this way, by restricting the operation of the video display device by authentication, it is possible to prevent the setting from being changed arbitrarily and to prevent an unintended setting, but a decrease in convenience for general users can be avoided. There wasn't.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a video display device that facilitates a general user's setting change while preventing an unintended setting change.

  Executing a part of the operations that can be performed on the video display device based on a comparison between the first authentication information for identifying the authority of the user and the input second authentication information. A control unit that switches between a general mode that is possible and a privileged mode in which the video display device can be operated in a wider range than the general mode, and a setting value of the video display device in the privileged mode is recorded as a first setting value And the control means deletes the second setting value, which is the setting value of the video display device in the general mode, under the predetermined condition, and reads the first setting value read from the recording means. The set value is a set value of the video display device.

  According to the present invention, it is possible to provide a video display device that facilitates a general user's setting change while preventing an unintended setting change.

Overall configuration diagram showing a projector of the present invention The flowchart figure in 1st Example of this invention. Setting example in the embodiment of the present invention The flowchart figure in the 2nd and 3rd Example of this invention Overall configuration diagram showing a display of the present invention

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

Example 1
A projector according to a first embodiment of the present invention will be described below with reference to FIG.

  The projector 10 includes a video signal input terminal 100, a video signal processing circuit 101, an OSD generation circuit 102, a communication unit 103, a control microcomputer 104, a nonvolatile memory 105, a volatile memory 106, an operation detection unit 107, a video projection optical system 108, a projection lens. 109, a lens ROM 110, a lens driving device 111, and a power supply unit (not shown).

  The video signal input terminal 100 is provided with connection terminals such as HDMI (registered trademark), DVI, and analog VGA. Video signals and audio signals from external video output devices such as PCs and Blu-ray Disc players are input.

  The video signal processing circuit 101 has a function of determining the resolution of an input video based on data such as a clock frequency of an input video signal and an info frame, and a function of scaling such as noise removal and enlargement / reduction.

  The OSD generation circuit 102 generates an OSD (on-screen display) image such as a menu image or an information icon image by graphic drawing, and displays the OSD image on a display image. The user can change various settings of the projector by operating the displayed OSD menu.

  The video projection optical system 108 includes a light source (not shown), a liquid crystal panel (not shown) that displays an image from the video signal processing circuit 101, an optical system (not shown) that guides light from the light source to the liquid crystal panel, and a liquid crystal panel. It is comprised from the optical system not shown which guides the light of this to a projection lens. As the light source, a high-pressure mercury lamp, LED, laser, or the like is used.

  The projection lens 109 projects light from the liquid crystal panel and displays an image. In addition, a lens ROM 110 which is a nonvolatile memory is provided, and information indicating the characteristics of the projection lens such as a product name of the projection lens, a lens focal length, a lens type, and an aperture value is recorded.

  Note that the projection lens 109 can be configured to be detachable, and the use application of the projector can be expanded by using a projection lens having different characteristics such as telephoto, wide angle, and aperture value.

  The lens driving device 111 can drive the motor by a drive pulse signal and vary the focal position and the magnification of the projection lens within the characteristic range of the projection lens.

  The control microcomputer 104 executes processing based on various settings recorded in the nonvolatile memory 105. Also, control is performed such as analyzing received data from the communication unit 103 described later, and changing an operation event from the operation detection unit 107 described later and an image generated by the OSD generation circuit 102 in synchronization. Further, the control microcomputer 104 performs authentication information setting such as password registration or change in accordance with a user's operation on the OSD menu. Further, by reading the information in the lens ROM 110, the range in which the projection lens can be driven is determined.

  The communication unit 103 includes a connection terminal such as RS-232C and a wired LAN, and a wireless communication transmission / reception unit, and can transmit and receive data to and from an external device in a predetermined communication format.

  The nonvolatile memory 105 is a rewritable nonvolatile recording medium that can retain information even when the power to the projector is turned off, and a flash memory, an EEPROM, or the like is used. A plurality of data may be arranged depending on the data volume to be recorded and the purpose of processing. The nonvolatile memory 105 stores various information related to the projector, such as a manufacturing serial number, firmware and version, EDID and version, and setting value. In addition, a recording area for setting content recording processing in a privileged mode described later is also provided.

  The volatile memory 106 is a RAM, and is used as a temporary recording area of the control microcomputer 104 while the power is on. Settings during operation are also recorded in this area.

  The operation detection unit 107 includes an operation unit (not illustrated) provided on the outer surface of the projector 10 and a light reception unit (not illustrated) such as an infrared remote controller or a wired remote controller, detects an event such as a button operation, and responds to it. A key code or the like is notified to the control microcomputer 104.

  FIG. 2 is a flowchart in the first embodiment of the present invention.

  Although not shown in the flowchart, a privileged user corresponding to an administrator operates the OSD menu and inputs a password as authentication information in advance before starting this processing flow. The input password is recorded in the nonvolatile memory 105.

<S100>
A setting value set in the privileged mode, which will be described later, is read from the nonvolatile memory 105 and set. Even if the setting is appropriately changed in a general mode to be described later, whenever the power of the projector 10 is turned on, the setting value set in the general mode is always erased and returns to the setting value set in the privileged mode. At this time, the focus position, zoom position, trapezoidal distortion correction, and the like of the projection lens, which are often set in accordance with the installation environment, return to the setting values set in the privileged mode.

<S101>
This is a step of performing user authentication and identifying the authority of the user.

  First, the previous mode information recorded in the nonvolatile memory 105 is read. The recording of mode information in the nonvolatile memory 105 will be described in S102 and S104 described later. When the mode information is the general mode, the process proceeds to S105.

  In the privileged mode, the user is prompted to enter a password as authentication information. If the input password and the password that is the authentication information recorded in the non-volatile memory 105 are compared, if they match, the process proceeds to S102. If they do not match, the process proceeds to S105.

<S102>
Since the authentication information matches, the operation range is wider than that in the general mode, and normally operates as a privilege mode in which all operations can be executed. Here, the focus position and zoom position of the projection lens of the projector, trapezoidal distortion correction setting, various image quality mode settings, and the like can be set according to the installation environment.

  For example, the OSD menu is operated and set as shown in FIG. 3A, for example, in order to make it easy to see the document video, such as the maximum display brightness, the image quality mode is the presentation mode, and the automatic extinguishing function is OFF.

  Also, the authentication information can be changed. For example, the password can be periodically updated to enhance security. Here, the fact that the mode has shifted to the privileged mode is recorded in the nonvolatile memory 105 as mode information.

<S103>
In the mode switching step, the OSD menu can be operated to switch to the general mode. Normally, when the setting in the privileged mode is completed, the mode is switched to the general mode so that the setting in the privileged mode and the authentication information are not changed carelessly. When switching to the general mode is selected, the process proceeds to S104. If the operation continues in the privileged mode, the process proceeds to S102.

<S104>
Since the transition is made from the privileged mode to the general mode, the setting value set in the privileged mode and the fact that the mode has been shifted to the general mode are recorded in the nonvolatile memory 105, and the process proceeds to S105.

<S105>
This is a step that operates as a general mode. In general mode, the same operations as privileged mode can be performed except for some operations that require authentication when switching from general mode to privileged mode and that authentication password cannot be registered or changed. .

  Therefore, even if it is desired to change the setting according to the number of participants in the conference and the form of the conference, the setting can be changed as appropriate without inquiring the administrator, and convenience for general users can be improved.

<S106>
In the step of executing the switching operation to the privileged mode, whether or not to shift to the privileged mode is selected according to a user instruction. When the transition to the privileged mode is executed, the process proceeds to S100, and when the transition to the privileged mode is not performed, the process returns to S105.

  As described above, when the power supply of the projector 10 is turned on, the control microcomputer 104 reads the privileged mode setting stored in the nonvolatile memory 105 and reflects it as the setting of the projector 10. That is, each setting value of the projector 10 returns to the state set in the privileged mode.

  For example, when the general user feels that the display brightness of the projector in use is too bright, an operation for reducing the brightness can be executed from the OSD menu as shown in FIG. The projector 10 is set to a state in which the brightness is lower than that set in the privileged mode. However, when the power is turned off and the power is turned on next time as shown in FIG. To do.

  As a result, the setting of the projector 10 can be changed as appropriate, and when another user uses the projector at another opportunity, it is possible to prevent a situation in which the setting is not intended.

(Example 2)
A projector according to a second embodiment of the invention will be described.

  The configuration of the projector is the same as that of the first embodiment.

  FIG. 4 is a flowchart in the second embodiment of the present invention. The description of the same step numbers as those in the processing flow of FIG. 2 in the first embodiment is omitted.

  The difference from the first embodiment is that the buttons of the operation unit provided on the apparatus or the remote controller are operated in a specific order in order to return to the setting value previously set in the privileged mode in the nonvolatile memory 105 (hereinafter referred to as the button). Operation pattern). The button operation pattern data is recorded.

<S207>
In the step of determining whether or not to read the setting value of the privileged mode, it is determined whether or not a predetermined condition is met.

  In this embodiment, the operation buttons on the operation unit or the operation buttons on the remote controller are input in a certain order. The control microcomputer 104 receives the key code of the operation button and compares the operation button pattern data input in a predetermined order with the operation pattern data recorded in the nonvolatile memory 105. If they match, the process moves to S208, and if they do not match, the process moves to S106.

<S208>
Since the predetermined condition is met, the setting value set in the general mode is erased and the setting value set in the privileged mode is read from the nonvolatile memory 105 and set as in S100. Thereby, it is possible to return to the setting value set in the privileged mode while maintaining the general mode.

  As described above, even when the setting is appropriately changed in the general mode, it is possible to return to the setting set in the privileged mode without turning off the power and operating the power on again.

  For example, when another user who is different from the previous user continues to use the projector, even if the previous user has changed the setting, turn off the projector and turn it on again. It is possible to return to the state set in the privilege mode.

(Example 3)
Hereinafter, a display according to a third embodiment of the present invention will be described with reference to FIG.

  The display 20 includes a video signal input terminal 100, a video signal processing circuit 101, an OSD generation circuit 102, a communication unit 103, a control microcomputer 104, a nonvolatile memory 105, a volatile memory 106, an operation detection unit 107, a video display unit 208, and a display panel drive. A circuit 209 and a power supply unit (not shown) are provided.

  The blocks having the same numbers as those of the projector in the first embodiment have the same functions in the display of this embodiment, and thus the description thereof is omitted.

  The video display unit 208 includes a liquid crystal panel (not shown), a backlight unit (not shown) that is disposed on the back side of the liquid crystal panel, and irradiates the liquid crystal panel with light.

  The display panel drive circuit 209 is a circuit that generates a timing signal and the like for driving a liquid crystal panel (not shown).

  FIG. 4 is a flowchart in the third embodiment of the present invention. The same step numbers as those in the processing flow of FIG. 2 in the first embodiment are the same in the display of this embodiment, and thus the description thereof is omitted.

  In the display of this embodiment, communication data for returning to the set value set in the privileged mode in advance is recorded in the nonvolatile memory 105.

<S207>
In the step of determining whether or not to read the setting value of the privileged mode, it is determined whether or not a predetermined condition is met.

  In this embodiment, a communication command is transmitted from an external device such as a PC. The control microcomputer 104 compares the received communication data with the communication data recorded in the nonvolatile memory 105. If they match, the process moves to S208, and if they do not match, the process moves to S106.

<S208>
Since the predetermined condition is met, the setting value set in the privileged mode is read from the nonvolatile memory 105 and set, as in S100. Thereby, it is possible to return to the setting value set in the privileged mode while maintaining the general mode.

  The communication here can be performed using RS-232C, wired LAN, wireless LAN, short-range wireless communication, or the like, as long as it is possible to transmit and receive predetermined communication data between apparatuses.

  For example, when a user who can execute the privilege mode has an employee ID card capable of short-range wireless communication, the employee ID data of the user is recorded in the nonvolatile memory 105 as communication data. After that, you can return to the settings that were set in the privileged mode simply by holding your employee ID card.

  Further, in the case of a system configuration in which a large number of displays are centrally managed in a lump, it can be remotely operated via a LAN and can be operated flexibly.

  As described above, even when the setting is appropriately changed in the general mode, it is possible to return to the setting set in the privileged mode by transmitting and receiving communication data without turning off the power and turning on the power again.

  As described above, according to the embodiment, the setting of the video display device can be appropriately changed in the general mode, while the preset setting of the video display device is not unexpectedly changed and is not intended. It is possible to prevent setting changes.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

  For example, when switching from the general mode to the privileged mode, the method for inputting the password has been shown in the embodiments. However, various methods such as execution of predetermined button operations, fingerprint authentication, vein authentication, or voice authentication have been described. Authentication means are available.

  Further, when the general mode is switched to the privileged mode, the setting value of the privileged mode may be read and set.

  Further, the video display device can be applied to a projector using DMD (Digital Mirror Device), a display using an organic EL panel, and the like.

  The present invention is effective for a video display device having an authentication function.

DESCRIPTION OF SYMBOLS 10 Projector 100 Video signal input terminal 101 Video signal processing circuit 102 OSD generation circuit 103 Communication part 104 Control microcomputer 105 Non-volatile memory 106 Volatile memory 107 Operation detection part 108 Image projection optical system 109 Projection lens 110 Lens ROM
111 Lens drive device

Claims (10)

A video display device,
Executing a part of the operations that can be performed on the video display device based on a comparison between the first authentication information for identifying the authority of the user and the input second authentication information. Control means for switching between a general mode that is possible and a privileged mode in which the operable range for the video display device is wider than the general mode;
Recording means for recording the set value of the video display device in the privilege mode as a first set value;
Further, the control means erases a second setting value, which is a setting value of the video display device in the general mode, under a predetermined condition, and uses the first setting value read from the recording means as the video. An image display device characterized in that the set value of the display device is used.   The video display apparatus according to claim 1, wherein when the first authentication information matches the second authentication information, the privileged mode is switched.   The video display device according to claim 1, wherein the general mode can execute an operation except that the first authentication information is set.   The setting value of the video display device in the privilege mode is recorded when the mode switching unit switches from the privilege mode to the general mode. The video display device described.   5. The predetermined condition is when the video display device is in the general mode, the power source of the video display device is turned off, and then the power source is turned on. The video display device according to claim 1.   The predetermined condition is that the video display device is in the general mode, and the operation buttons of the video display device or the operation buttons of the remote controller are input in a predetermined order. The video display device according to claim 1.   5. The video display device according to claim 1, wherein the predetermined condition is a case where the video display device is in the general mode and is switched to the privileged mode. 6.   The video display device further includes a communication unit, and the predetermined condition is when the video display device is in the general mode and predetermined communication data is input by the communication unit. Item 5. The video display device according to any one of Items 1 to 4. A method of controlling a video display device,
Comparing the first authentication information for identifying the authority of the user with the input second authentication information;
Based on the result of the comparison step, a general mode in which a part of operations that can be performed on the video display device can be executed, and a range in which the video display device can be operated is wider than the general mode. A mode switching step for switching between the privileged mode,
A recording step of recording a set value of the video display device in the privileged mode as a first set value;
Under a predetermined condition, the second setting value, which is the setting value of the video display device in the general mode, is deleted, and the first setting value read from the recording unit is set as the setting value of the video display device. And steps to
A method for controlling a video display device, comprising: A control program for controlling a video display device,
Comparing the first authentication information for identifying the authority of the user with the input second authentication information;
Based on the result of the comparison step, a general mode in which a part of operations that can be performed on the video display device can be executed, and a range in which the video display device can be operated is wider than the general mode. A mode switching step for switching between the privileged mode,
A recording step of recording a set value of the video display device in the privileged mode as a first set value;
Under a predetermined condition, the second setting value, which is the setting value of the video display device in the general mode, is deleted, and the first setting value read from the recording unit is set as the setting value of the video display device. And steps to
The control program characterized by performing.

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