JP2008139771A - Image display device, control method, control program, and recording medium - Google Patents

Abstract

An image display apparatus capable of improving convenience is provided.
A control device constituting a projector as an image display device includes an input selection unit that selects any one of the plurality of input terminals, and an input that is set for each of the plurality of input terminals. Whether or not it is an input state in which an image signal is input via the memory 46 that stores priority information regarding the priority at the time of selecting the terminal 30 and the input terminal 30 selected by the input selection unit 41. Priority input for preferentially inputting an image signal to the input state detection unit 42 to be detected and the input terminal 30 selected in descending order of priority and detected as being in the input state by the input state detection unit 42 A main controller 45 for recognizing a terminal and inputting an image signal via a priority input terminal; and a table for displaying an image on the image projection unit 10 based on the image signal input via the priority input terminal. And a control unit 44.
[Selection] Figure 1

Description

  The present invention relates to an image display device, a control method, a control program, and a recording medium.

2. Description of the Related Art Conventionally, there has been known an image display device such as a projector capable of giving a presentation and watching a movie or the like by receiving supply of various types of image signals (see, for example, Patent Document 1). ).
The image display device described in Patent Document 1 includes a plurality of input terminals for connecting to various external devices such as a personal computer and a DVD (Digital Versatile Disk) player, and is provided in a main body operation unit or a remote controller. The input of various types of image signals can be switched by operating the changeover switch (input switching operation).

JP 2003-274316 A

  However, in the image display device described in Patent Document 1, a plurality of operations are required before switching to input of a desired image signal, which complicates the user and cannot improve convenience. There is a problem.

  An object of the present invention is to provide an image display device, a control method, a control program, and a recording medium that can improve convenience.

  An image display apparatus according to the present invention includes a display unit that displays an image based on image information, a plurality of input terminals for inputting the image information, and an input through any one of the plurality of input terminals. An image display apparatus comprising: a control unit that causes the display unit to display an image based on the image information, wherein the control unit includes: an input selection unit that selects any one of the plurality of input terminals; A priority information storage unit that is set for each of the plurality of input terminals and stores priority information related to a priority when the input terminal is selected, and the input terminal selected by the input selection unit An input state detection unit that detects whether or not an image information is input, and an input selection unit that selects the input terminal in descending order of priority based on the priority information to detect the input state Part Selection control for recognizing the input terminal detected as being in the input state as a priority input terminal for preferentially inputting the image information and performing selection control for inputting the image information via the priority input terminal And a display control unit that performs display control for displaying an image on the display unit based on the image information input via the priority input terminal.

In the present invention, the control means constituting the image display device includes an input selection unit, a priority information storage unit, an input state detection unit, a selection control unit, and a display control unit. Information can be input, and an image based on the input image information can be displayed on the display means.
First, the selection control unit reads the priority information stored in the priority information storage unit, and causes the input selection unit to select input terminals in descending order of priority based on the priority information (selection step).
The input state detection unit detects whether or not the input state is an input state in which image information is input through the selected input terminal every time the input selection unit is selected by the input selection unit (input state). Detection step).
The selection control unit recognizes the input terminal detected as being in the input state by the input state detection unit as a priority input terminal for preferentially inputting image information, and inputs the image information via the priority input terminal. (Input step)
Thereafter, the display control unit causes the display means to display an image based on the image information input via the priority input terminal (display step).

  As described above, the control means detects the input state of the input terminal while selecting the input terminal in descending order of priority, and is an input terminal that is an input state having a high priority and image information being input. It is possible to execute processing for selecting (priority input terminal) and inputting image information via the priority input terminal. As a result, it is possible to automatically switch to the input of desired (high priority) image information (image signal), and without complicating the user to perform the input switching operation a plurality of times. , The convenience can be improved.

  An image display apparatus according to the present invention includes a display unit that displays an image based on image information, a plurality of input terminals for inputting the image information, and an input through any one of the plurality of input terminals. An image display apparatus comprising: a control unit that causes the display unit to display an image based on the image information, wherein the control unit includes: an input selection unit that selects any one of the plurality of input terminals; A priority information storage unit that is set for each of the plurality of input terminals and stores priority information regarding a priority when the input terminal is selected; and the image information is input for each of the plurality of input terminals. An input state detection unit that detects whether or not the input state is present, and an input terminal having a high priority based on the priority information among the input terminals detected by the input state detection unit as being in the input state. ,priority A selection control unit for recognizing as a priority input terminal for inputting the image information, and performing selection control for causing the input selection unit to select the priority input terminal and inputting the image information via the priority input terminal; And a display control unit that performs display control for causing the display unit to display an image based on the image information input via a priority input terminal.

In the present invention, the control means constituting the image display device includes an input selection unit, a priority information storage unit, an input state detection unit, a selection control unit, and a display control unit. Information can be input, and an image based on the input image information can be displayed on the display means.
First, the input state detection unit directly connects to each of the plurality of input terminals, and collectively detects whether or not the input state is where image information is input to each of the plurality of input terminals (input state detection step). ).
Next, the selection control unit reads the priority information stored in the priority information storage unit. The selection control unit is a priority input terminal that preferentially inputs image information to an input terminal having a high priority based on priority information among the input terminals detected by the input state detection unit as being in the input state. Then, the priority input terminal is selected by the input selection unit and image information is input through the priority input terminal (selection input step).
Thereafter, the display control unit causes the display means to display an image based on the image information input via the priority input terminal (display step).

  As described above, the control means collectively detects the input terminals in the input state, and recognizes the input terminal having the highest priority (priority input terminal) among the input terminals in the input state based on the priority information. Thus, it is possible to select a priority input terminal that has a high priority and is in an input state in which image information is input, and execute processing for inputting the image information through the priority input terminal. As a result, it is possible to automatically switch to the input of desired (high priority) image information (image signal), and without complicating the user to perform the input switching operation a plurality of times. , The convenience can be improved.

The image display device of the present invention further includes setting input means for selecting and inputting input switching information for selecting the other input terminal and switching the input of the image information, and the selection control unit is configured to input the setting input means to the setting input means. It is preferable that the selection control is performed when input switching information is set and input.
By the way, in the conventional image display device, when a plurality of external devices are connected and image signals are respectively supplied from the plurality of external devices, when the input switching operation is sequentially performed, the input of the image signals is sequentially performed. Since switching is performed, an image corresponding to the image signal supplied from each external device is displayed. For example, when an input switching operation is mistakenly performed while a presentation is being performed by displaying an image corresponding to an image signal supplied from an external device such as a personal computer, other types not used for the presentation An image corresponding to an image signal supplied from an external device will be displayed.

  In the present invention, the selection control unit performs selection control (selection step, input step, selection input step) when an input switching operation is performed by the user (when input switching information is set and input to the setting input means). To implement. As a result, when an input switching operation is performed, the control means selects a priority input terminal that has a high priority and is in an input state in which image information is input, and the image is input via the priority input terminal. Since the process for inputting information is executed, for example, in the above case, if the priority of the input terminal for inputting the image signal supplied from the external device such as a personal computer is set high, the input is switched by mistake. Even if the operation is performed, the input terminal is selected again, and it is possible to prevent an image corresponding to an image signal supplied from another external device not used for presentation from being displayed.

In the image display device of the present invention, when the display control unit performs the display control based on the image information input via a predetermined input terminal, the input switching information is input to the setting input unit. When the selection is input by setting, the selection control unit executes the selection control, and when the selection control unit recognizes the predetermined input terminal as the priority input terminal, the input of the image information is switched. It is preferable to display an image based on warning information to invalidate the image on the display means.
By the way, when the image based on the image information input through the predetermined input terminal is displayed on the display means, the selection control unit performs the selection control by performing the input switching operation by the user. When the predetermined input terminal is recognized as the priority input terminal again, the image displayed on the display means is not switched. That is, the user may recognize that the image display device has failed because the displayed image is not switched despite the input switching operation.

  In the present invention, the display control unit performs the selection control by the selection control unit when the input switching operation is performed by the user during the display control, and the same input terminal is preferentially input again. When it is recognized that the terminal is a terminal, an image based on warning information indicating that switching of input of image information is invalid is displayed on the display means. Accordingly, as an image based on the warning information, for example, if a message that “the input currently displayed is the input with the highest priority” is displayed, the user can switch the input in the above case. Recognize that the currently displayed input has the highest priority and recognize that the image display device has failed even if the displayed image does not switch despite the operation being performed. There is no.

In the image display device according to the aspect of the invention, the selection control unit may include the input state detection unit when the display control is performed based on the image information input by the display control unit via a predetermined input terminal. Preferably, the selection control is performed again when the predetermined input terminal is no longer detected as being in the input state.
By the way, when the image based on the image information input through the predetermined input terminal is displayed on the display means, the image information is not input through the predetermined input terminal (for example, the predetermined input terminal). When an external device connected to the input terminal is removed, image information is not supplied via the predetermined input terminal, so that the display means performs a solid no-signal display.

  In the present invention, the input state detection unit inputs image information via the predetermined input terminal when display control is performed based on the image information input via the predetermined input terminal by the display control unit. It is always detected whether or not the input state is set. That is, the input state detection unit can detect that image information is no longer input via the predetermined input terminal. Then, the selection control unit performs selection control (selection step, input step, selection input step) again when the input state detection unit no longer detects that the predetermined input terminal is in the input state. As a result, even when image information is no longer input via the predetermined input terminal, the priority is high among the input terminals other than the predetermined input terminal, and the image information is input. Since the priority input terminal that is in the input state is selected and the image information is input through the priority input terminal, an image based on the image information is displayed on the display means. Accordingly, it is possible to always display an image based on the image information on the display means, for example, from other external devices that are not used for the presentation without performing an input switching operation between presentations by a plurality of presenters. A predetermined image based on the supplied image signal can be automatically displayed on the display means.

  According to the control method of the present invention, display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and input through any one of the plurality of input terminals A control method for an image display device comprising a control means for causing the display means to display an image based on image information, wherein the control means is set for each of the plurality of input terminals and selects the input terminal. A selection step of selecting the input terminals in descending order of priority based on priority information relating to priority, and whether or not the image information is input via the input terminals selected in the selection step. An input state detection step for detecting the input state, and an input terminal detected as the input state in the input state detection step as a priority input terminal for preferentially inputting the image information An input step for inputting the image information via the priority input terminal, and a display step for displaying an image on the display means based on the image information input via the priority input terminal. It is characterized by doing.

  According to the control method of the present invention, display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and input through any one of the plurality of input terminals A control method for an image display device comprising a control means for displaying an image based on image information on the display means, wherein the control means is in an input state in which the image information is input for each of the plurality of input terminals. An input state detection step for detecting whether or not the input state is detected, and among the input terminals detected as being in the input state in the input state detection step, the input terminal set for each of the plurality of input terminals is selected. An input terminal having a high priority based on priority information regarding priority at the time is recognized as a priority input terminal for preferentially inputting the image information, and the priority input terminal is selected by selecting the priority input terminal. A selection input step for inputting the image information via a display, and a display step for displaying an image on the display means based on the image information input via the priority input terminal. .

  Since the control method of the present invention is implemented by the above-described image display device, it can enjoy the same operations and effects as the above-described image display device.

  The control program of the present invention is input via a display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and any one of the plurality of input terminals. A control program for an image display device comprising a control means for displaying an image based on image information on the display means, wherein the control means executes the control method described above.

  The recording medium of the present invention is characterized in that the control program described above is recorded in a computer readable manner.

Since the control program and the recording medium configured as described above are used to implement the control method described above, the same operations and effects as the control method described above can be enjoyed.
Further, since the control program described above is recorded on the recording medium, the handling of the program becomes easy.

[First embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a block diagram showing the configuration of the projector 1 in the first embodiment.
The projector 1 performs predetermined image processing on the input image information (image signal), and optically processes a light beam emitted from the light source based on the image information subjected to the image processing to form image light. The projected image is enlarged and projected on a screen (not shown). As shown in FIG. 1, the projector 1 is roughly composed of an image projection unit 10 as a display unit, an operation unit 20 as a setting input unit, a plurality of input terminals 30, and a control device 40 as a control unit. Has been.

Under the control of the control device 40, the image projection unit 10 forms image light and enlarges and projects it onto the screen. As shown in FIG. 1, the image projection unit 10 includes a light source device 11, a liquid crystal light valve 12 as a light modulation element, a projection optical system 13, and the like.
The light source device 11 emits a light beam toward the liquid crystal light valve 12 under the control of the control device 40. The light source device 11 includes a light source lamp 111 and a light source driving unit 112.

The light source lamp 111 is composed of an ultra high pressure mercury lamp. It should be noted that other discharge light source lamps such as a metal halide lamp and a xenon lamp may be employed in addition to the ultra-high pressure mercury lamp. Furthermore, the present invention is not limited to a discharge light source lamp, and various solid light emitting elements such as a light emitting diode, a laser diode, an organic EL (Electro Luminescence) element, and a silicon light emitting element may be employed.
The light source driving unit 112 drives the light source lamp 111 with a predetermined driving voltage under the control of the control device 40.

The liquid crystal light valve 12 is a transmissive liquid crystal panel that changes the arrangement of liquid crystal molecules sealed in a liquid crystal cell (not shown) based on a drive signal from the control device 40 and is emitted from the light source lamp 111. Image light corresponding to the drive signal is emitted to the projection optical system 13 by transmitting or blocking the light flux.
The projection optical system 13 enlarges and projects the image light emitted from the liquid crystal light valve 12 toward the screen.

  Although not shown, the projector 1 includes three liquid crystal light valves 12 corresponding to the three colors RGB. The light source device 11 also includes a color separation optical system that separates the light source light into three colors of light. Furthermore, the projection optical system 13 has a color combining optical system that generates image light representing a color image by combining three color image lights. As for the configuration of such an optical system, various general projector optical system configurations can be used.

The operation unit 20 includes a remote controller (not shown) and buttons and keys provided in the projector 1. The operation unit 20 recognizes an operation by the user and outputs a predetermined operation signal to the control device 40. As shown in FIG. 1, the operation unit 20 includes an input switching unit 21 and the like. In FIG. 1, other input units such as an input unit that performs ON / OFF of the projector 1 in the operation unit 20, an input unit that performs volume adjustment, and an input unit that performs image quality adjustment of a projected image are illustrated. Is omitted.
The input switching unit 21 is an input button for setting and inputting input switching information for selecting another input terminal and switching the input of an image signal. Then, the input switching unit 21 recognizes pressing by the user and outputs an operation signal as input switching information to the control device 40.

The plurality of input terminals 30 are input terminals for inputting image signals from an external device (not shown). As shown in FIG. 1, a first input terminal 31, a second input terminal 32, and a first input terminal 30 are provided. 3 input terminals 33 and a fourth input terminal 34.
The first input terminal 31 is configured by a terminal (for example, a Dsub terminal) for inputting an analog RGB signal in which signals for R (red), G (green), and B (blue) components are independent. . That is, the first input terminal 31 can be connected to an external device such as a personal computer via a signal line, and receives an analog RGB signal output from the personal computer or the like.

  The second input terminal 32 is typified by high-definition broadcasting, and includes a luminance signal having luminance information, a red difference signal obtained by taking the difference between the luminance signal and the red signal, and a blue difference signal obtained by taking the difference between the luminance signal and the blue signal. And a terminal (for example, D terminal) for inputting a component signal composed of the three signals. In other words, the second input terminal 32 can be connected to an external device such as a DVD player via a signal line, and inputs a component signal output from the DVD player or the like.

The third input terminal 33 includes a terminal (for example, an S terminal) for inputting an S signal obtained by separating a signal having luminance information and a signal having color information. That is, the third input terminal 33 can be connected to an external device such as an S signal video tape recorder via a signal line, and inputs an S signal output from the S signal video tape recorder or the like.
The fourth input terminal 34 is represented by a conventional terrestrial TV broadcast, and is a terminal for inputting a composite signal in which a signal having luminance information and a signal having color information are combined (for example, a 1RCA terminal or the like). ). That is, the fourth input terminal 34 can be connected to an external device such as a video tape recorder via a signal line, and inputs a composite signal output from the video tape recorder or the like.

  The control device 40 includes a main control unit 45 such as a CPU (Central Processing Unit) and controls the entire projector 1 according to a control program stored in the memory 46. As a configuration of the control device 40, the processing function of the input image signal is mainly described, and description of other functions is omitted. In addition to the main control unit 45 and the memory 46, the control device 40 includes an input selection unit 41, an input state detection unit 42, a signal conversion unit 43, a display control unit 44, and the like.

The input selection unit 41 selects any one of the plurality of input terminals 31 to 34 in accordance with a control signal from the main control unit 45, and inputs a signal through the selected input terminal 30. It consists of a so-called selector.
The input state detection unit 42 detects whether or not the image signal is input through the input terminal 30 selected by the input selection unit 41 according to a control signal from the main control unit 45. To do. For example, the input state detection unit 42 determines whether or not the image signal is being input via the input terminal 30 selected by the input selection unit 41, based on the synchronization signal included in the image signal. Detect by checking the presence or absence. Then, the input state detection unit 42 outputs a signal corresponding to the input state in which the image signal is input or the non-input state in which the image signal is not input to the main control unit 45.

  The signal conversion unit 43 performs predetermined signal processing on the image signal input through the input terminal 30 selected by the input selection unit 41 in accordance with a control signal from the main control unit 45, and performs digital processing. Output as a signal (digital image data). For example, if the input image signal is an analog RGB signal or a component signal, the signal conversion unit 43 performs A / D conversion processing and outputs the digital signal. Further, when the input image signal is an S signal or a composite signal, the signal conversion unit 43 converts the signal into a component signal, performs A / D conversion processing, and outputs the signal as a digital signal.

  The display control unit 44 is a part that performs drive control of the liquid crystal light valve 12 in accordance with a control signal from the main control unit 45. More specifically, the display control unit 44 performs predetermined image data processing on the digital image data input via the signal conversion unit 43, and performs digital image data (hereinafter, processed image data) subjected to the image data processing. ) Is output to the liquid crystal light valve 12 to perform display control for causing the liquid crystal light valve 12 to form an image (image light) based on the processed image data. As shown in FIG. 1, the display control unit 44 includes an image data processing unit 441, a panel driving unit 442, and the like.

  The image data processing unit 441 performs resolution conversion processing for adjusting the resolution to the resolution (number of pixels) of the liquid crystal light valve 12 for the digital image data output from the signal conversion unit 43, image size adjustment processing such as enlargement / reduction, Various image data processing such as brightness adjustment processing, contrast adjustment processing, sharpness adjustment processing, processing for synthesizing OSD (on-screen display) images such as menus and messages, trapezoidal distortion correction processing, and gamma correction processing is performed. Although not specifically shown, the image data processing unit 441 includes an image memory and an OSD memory for performing the above-described image data processing. The image memory is a part that buffers input image data. For example, a frame buffer that stores all image data for one screen, a line buffer that stores scanning data for one horizontal line, and the like are used. it can. The OSD memory is a part for storing OSD image information related to OSD images such as menus and messages.

  The panel drive unit 442 generates a drive signal for driving the liquid crystal light valve 12 from the processed image data subjected to the image data processing by the image data processing unit 441, and outputs the drive signal to the liquid crystal light valve 12. Thus, the liquid crystal light valve 12 is caused to form an image (image light) based on the processed image data.

In addition to the control program, the memory 46 is set for each of the input terminals 31 to 34 and stores priority information related to the priority when selecting the input terminal. Here, as the priority information, each priority “1”, “2”, “3”, “4”, where “1” is the higher priority and “4” is the lower priority, This is information associated with each input terminal 31-34. The priority information stored in the memory 46 may be information set in advance, or may be information that can be set and changed by the operation of the operation unit 20 by the user.
That is, the memory 46 corresponds to a priority information storage unit according to the present invention.

The main control unit 45 outputs a predetermined control signal to each of the constituent members 41 to 44 according to a control program stored in the memory 46, and executes a predetermined process. For example, the main control unit 45 is stored in the memory 46 when the projector 1 is started up or when an operation signal is input from the input switching unit 21 of the operation unit 20 when the projector 1 is driven (when the input switching operation is performed). The input selection unit 41 selects the input terminals 30 in descending order of priority based on the priority information, and the image signal is preferentially input to the input terminals 30 detected by the input state detection unit 42 as being in the input state. Selection control for recognizing the input signal as a priority input terminal and inputting an image signal through the priority input terminal.
That is, the main control unit 45 corresponds to a selection control unit according to the present invention.

[Projector operation (control method)]
Next, the operation of the projector 1 described above will be described with reference to the drawings.
Hereinafter, as the operation of the projector 1, the operation of selecting the input terminal 30 will be mainly described, and description of other operations will be omitted. In addition, as the selection operation of the input terminal 30, a selection operation when the projector 1 is started and a selection operation when the input switching operation is performed will be described in order.
In the following, for convenience of explanation, as priority information stored in the memory 46, the priority “1” is associated with the first input terminal 31 and the priority “2” is associated with the second input terminal 32. It is assumed that the priority “3” is associated with the third input terminal 33 and the priority “4” is associated with the fourth input terminal 34. In addition, among the input terminals 31 to 34, the other input terminals 32 to 34 other than the first input terminal 31 are connected to the respective external devices, and image signals are supplied to the input terminals 32 to 34, respectively. Shall.

[Selection operation at startup]
FIG. 2 is a flowchart for explaining the operation of the projector 1 at the time of activation.
When the power of the projector 1 is turned on by the user's input operation of the operation unit 20 and the projector 1 is activated, the main control unit 45 reads the control program stored in the memory 46 and performs the following processing according to the control program. Execute.
That is, the main control unit 45 reads the priority information stored in the memory 46 and recognizes the priority of each input terminal 31 to 34 (step S1).
After step S1, the main control unit 45 sets the input terminal 30 associated with “1” having the highest priority (in this embodiment, the first input terminal 31 by setting the priority information as described above). And a predetermined control signal is output to the input selection unit 41. And the input selection part 41 selects the input terminal 30 (1st input terminal 31) with the highest priority according to the control signal from the main control part 45 (step S2).

After step S <b> 2, the main control unit 45 outputs a predetermined control signal to the input state detection unit 42. The input state detection unit 42 receives an image signal at the input terminal 30 (first input terminal 31 having the highest priority) selected by the input selection unit 41 in accordance with a control signal from the main control unit 45. It is detected whether or not the input state is being input (step S3: input state detection step).
After step S3, the main controller 45 selects the input terminal 30 (first input terminal 31 with the highest priority) selected by the input selector 41 based on the signal output from the input state detector 42. Is in an input state (step S4).

In the present embodiment, depending on the connection state between the input terminal 30 and the external device as described above, that is, the first input terminal 31 is not connected to the external device (for example, a personal computer), and an image signal is supplied. In step S3, the input state detection unit 42 detects that the first input terminal 31 selected by the input selection unit 41 is in the non-input state, and outputs a signal corresponding to the non-input state. Output to the main controller 45.
In step S4, the main control unit 45 determines that “N”, that is, the first input terminal 31 is in the non-input state.

In step S4, when the main control unit 45 determines “N”, that is, when it is determined that the input terminal 30 (first input terminal 31) having the highest priority is in a non-input state, all four. It is determined whether or not the input state of the input terminals 31 to 34 has been detected (step S5).
In step S5, when the main control unit 45 determines “N”, that is, when it is determined that the input states of all four input terminals 31 to 34 are not detected, the main control unit 45 performs the next based on the priority information. The input terminal 30 having a high priority (in the present embodiment, the second input terminal 32 by setting the priority information as described above) is recognized, and a predetermined control signal is output to the input selection unit 41. And the input selection part 41 selects the input terminal 30 (2nd input terminal 32) with the next highest priority according to the control signal from the main control part 45 (step S6: selection step).

After step S6, the main control unit 45 again causes the input state detection unit 42 to detect whether or not the input terminal 30 (second input terminal 32) having the next highest priority is in the input state (step S3). ) Based on the signal output from the input state detection unit 42, it is determined whether or not the input terminal 30 (second input terminal 32) having the next highest priority is in the input state (step S4).
In this embodiment, according to the connection state between the input terminal 30 and the external device as described above, that is, the second input terminal 32 is connected to the external device (for example, a DVD player), and an image signal is supplied from the external device. Therefore, in step S3, the input state detection unit 42 detects that the second input terminal 32 is in the input state, and outputs a signal corresponding to the input state to the main control unit 45.
In step S4, the main control unit 45 determines that “Y”, that is, the second input terminal 32 is in the input state.

As described above, when the projector 1 is driven, the main control unit 45 causes the input state detection unit 42 to input the input terminal 30 while causing the input selection unit 41 to select the input terminal 30 in order of priority in steps S1 to S6. 30 input states are detected.
Steps S1, S2, and S6 correspond to the selection step according to the present invention.

  In step S4, when the main control unit 45 determines “Y”, that is, when it is determined that the input terminal 30 (second input terminal 32) selected by the input selection unit 41 is in the input state, The input terminal 30 (second input terminal 32) is recognized as a priority input terminal for preferentially inputting an image signal, and an image signal is input through the priority input terminal (second input terminal 32) (step) S7: Input step).

  After step S <b> 7, the main control unit 45 outputs a predetermined control signal to the signal conversion unit 43. Then, the signal conversion unit 43 performs signal processing on the image signal (component signal) input via the priority input terminal (second input terminal 32) according to the control signal from the main control unit 45. And output as a digital signal. Further, the main control unit 45 outputs a predetermined control signal to the display control unit 44. Then, the display control unit 44 performs image data processing on the digital image data output from the signal conversion unit 43 in response to a control signal from the main control unit 45, and sends the image signal to the liquid crystal light valve 12. The image light based on is formed. Through the above processing, the image light is enlarged and projected from the projector 1, and an image (video) based on the image signal output from the external device (DVD player or the like) is displayed on the screen (step S8: display step).

In step S8, after the image based on the image signal via the priority input terminal (second input terminal 32) is displayed on the screen and the projector 1 is driven, the main control unit 45 returns to step S3 again, Steps S3 to S7 are repeated.
That is, while the image signal is supplied via the priority input terminal (second input terminal 32), the main control unit 45 inputs the priority input terminal (second input terminal 32) in steps S3 and S4. In step S7, the second input terminal 32 is recognized as a priority input terminal. In step S8, the priority input terminal (second input terminal 32) output from the external device (such as a DVD player) is determined. The video display based on the image signal input via is continued.

On the other hand, when the image signal is no longer supplied via the priority input terminal (second input terminal 32), the main control unit 45 (for example, when an external device connected to the second input terminal 32 is removed) ), In steps S3 and S4, it is determined that the priority input terminal (second input terminal 32) is in the non-input state. Therefore, in steps S5 and S6, the input associated with “3” having the next highest priority. The input selection unit 41 is selected by the terminal 30 (in the present embodiment, the third input terminal 33 is set by setting the priority information as described above). Then, depending on the connection state between the input terminal 30 and the external device as described above, the main control unit 45 determines that the input terminal 30 (third input terminal 33) having the next highest priority is in the input state in steps S3 and S4. Therefore, in step S7, the third input terminal 33 is recognized as a priority input terminal. In step S8, an image signal output from an external device (such as a DVD player) and input via the second input terminal 32 is determined. Is switched from the video display based on the video signal based on the image signal output from the external device (S signal video tape recorder or the like) and input via the priority input terminal (third input terminal 33).
That is, when the display control is being performed based on the image signal input from the display control unit 44 via the predetermined input terminal (second input terminal 32), the main control unit 45 performs the input state detection unit 42. When the predetermined input terminal (second input terminal 32) is no longer detected as being in the input state, selection control (selection step S6, input step S7) is performed again.

  Note that the input terminal 30 is not connected to the external device as described above and, for example, when the image signal is not supplied to all the input terminals 31 to 34 (for example, all the input terminals 31 to 34 are connected to the external device). The main control unit 45 repeatedly performs the above-described steps S3 to S6. In step S5, the main control unit 45 repeats “Y”, that is, the input states of all four input terminals 31 to 34. It is determined that has been detected. In step S <b> 5, if the main control unit 45 determines “Y”, the main control unit 45 outputs a predetermined control signal to the display control unit 44. The display control unit 44 causes the liquid crystal light valve 12 to form, for example, blue plain image light. Through the above processing, the image light is enlarged and projected from the projector 1, and a no-signal image (blue plain image) indicating a no-signal state is displayed on the screen (step S9).

[Selection operation during input switching operation]
FIG. 3 is a flowchart for explaining the operation of the projector 1 during the input switching operation.
FIG. 4 is a diagram for explaining the operation of the projector 1 during the input switching operation. More specifically, FIG. 4 is a diagram illustrating an example of an image displayed by the operation of the projector 1 during the input switching operation.
When the video display based on the image signal output from the external device (DVD player or the like) and input through the priority input terminal (second input terminal 32) is performed in step S8 described above, the main control unit 45 It is constantly monitored whether or not the user has pressed the input switching unit 21 and has input an operation signal as input switching information from the input switching unit 21 (step S10). That is, the main control unit 45 outputs from the external device (DVD player or the like) in step S8 and inputs it through the priority input terminal (second input terminal 32) until the operation signal from the input switching unit 21 is input. Continue to display video based on the image signal.

In step S10, when the main control unit 45 determines “Y”, that is, when an input switching operation is performed by the user, the image signal of the image displayed in step S8 based on the priority information. It is determined whether or not there is an input terminal 30 with a higher priority than the input terminal 30 (second input terminal 32) that receives the input (step S11).
In the present embodiment, by setting the priority information as described above, the main control unit 45 inputs “Y” in step S11, that is, an input terminal that inputs the image signal of the image displayed in step S8. It is determined that there is an input terminal 30 (first input terminal 31) having a higher priority than 30 (second input terminal 32).

In step S11, when the main control unit 45 determines “Y”, that is, it has priority over the input terminal 30 (second input terminal 32) that inputs the image signal of the image displayed in step S8. If it is determined that there is a high-priority input terminal 30 (first input terminal 31), the high-priority input terminal is recognized based on the priority information (step S12).
In the present embodiment, by setting the priority information as described above, the main control unit 45, in step S12, inputs the input terminal 30 (second input) to which the image signal of the image displayed in step S8 is input. It is recognized that the input terminal 30 having a higher priority than the terminal 32) is only the first input terminal 31.

  After step S12, the main control unit 45 recognizes the input terminal 30 (first input terminal 31) having the highest priority among the input terminals 30 having high priority recognized in step S12, and the input selection unit 41. To output a predetermined control signal. Then, the input selection unit 41 responds to the control signal from the main control unit 45, and the input terminal 30 (first input terminal) having the highest priority among the input terminals 30 having high priority recognized in step S12. 31) is selected (step S13).

After step S <b> 13, the main control unit 45 outputs a predetermined control signal to the input state detection unit 42. Then, the input state detection unit 42 detects whether or not the input terminal 30 (first input terminal 31) selected in step S13 is in an input state in accordance with a control signal from the main control unit 45 ( Step S14: Input state detection step).
After step S14, the main control unit 45 determines whether or not the input terminal 30 (first input terminal 31) selected in step S13 is in the input state based on the signal output from the input state detection unit 42. Is determined (step S15).

In the present embodiment, depending on the connection state between the input terminal 30 and the external device as described above, that is, the first input terminal 31 is not connected to the external device (for example, a personal computer), and an image signal is supplied. In step S14, the input state detection unit 42 detects that the first input terminal 31 selected by the input selection unit 41 is in the non-input state, and outputs a signal corresponding to the non-input state. Output to the main controller 45.
In step S15, the main control unit 45 determines that “N”, that is, the first input terminal 31 is in the non-input state.

In step S15, when the main control unit 45 determines “N”, that is, when it is determined that the input terminal 30 (first input terminal 31) selected in step S13 is in a non-input state, It is determined whether or not all input terminals 30 with high priority recognized in step S12 have been selected by the input selection unit 41 (step S16).
In the present embodiment, as described above, in step S12, the main control unit 45 has priority over the input terminal 30 (second input terminal 32) that inputs the image signal of the image displayed in step S8. It is recognized that the input terminal 30 having a high degree is only the first input terminal 31. For this reason, in step S <b> 16, the main control unit 45 determines that the input selection unit 41 has selected “Y”, that is, all input terminals having a higher priority than the second input terminal 32.

  If the main control unit 45 determines “N” in step S16, that is, if it is determined that the input selection unit 41 has selected all the input terminals 30 with high priority recognized in step S12, In S8, the input terminal 30 (second input terminal 32) to which the image signal of the displayed image is input is recognized as a priority input terminal, and a predetermined control signal is output to the input selection unit 41. Then, the input selection unit 41 selects the priority input terminal (second input terminal 32) again according to the control signal from the main control unit 45, and passes through the priority input terminal (second input terminal 32). Then, an image signal is input (step S17: input step).

After step S17, the main control unit 45 outputs a predetermined control signal (including a predetermined OSD command) to the signal conversion unit 43 and the display control unit 44. Then, the signal conversion unit 43 and the display control unit 44 respond to an image signal (component signal) input via the priority input terminal (second input terminal 32) in accordance with a control signal from the main control unit 45. The liquid crystal light valve 12 forms image light based on the image signal. Further, the display control unit 44 reads out OSD image information (message), which is warning information indicating that the switching of the input of the image signal is invalid, from the OSD memory in response to the OSD command from the main control unit 45. The liquid crystal light valve 12 is caused to form image light in which a message is superimposed on an image based on an image signal input via the priority input terminal (second input terminal 32).
Then, as shown in FIG. 4, the image light is enlarged and projected from the projector 1, and the image D0 based on the image signal input via the priority input terminal (second input terminal 32) on the screen is An image D on which a message D1 that is warning information, for example, “the input currently displayed is the input with the highest priority” is superimposed is displayed (step S18).

  Here, for example, when the input terminal 30 to which the image signal of the image displayed in step S8 is input is the first input terminal 31, the first information is set by the priority information as described above. Since there is no input terminal 30 associated with a priority higher than the priority “1” associated with the input terminal 31, the main control unit 45 displays “N” in step S11, that is, in step S8. It is determined that there is no input terminal 30 having a higher priority than the input terminal 30 (first input terminal 31) that is inputting the image signal of the current image. If the main control unit 45 determines “N” in step S11, the main control unit 45 proceeds to step S18. In step S18, the main control unit 45 sends a predetermined control signal (predetermined OSD) to the signal conversion unit 43 and the display control unit 44. Command) and display the image D on the screen.

Further, for example, when the image signal is not supplied via the second input terminal 32 (for example, when an external device connected to the second input terminal 32 is removed), as described above, The priority input terminal becomes the third input terminal 33, and an image based on the image signal output from the external device and input via the third input terminal 33 in step S8 is displayed. In this case, in step S12, the main control unit 45 has an input terminal having a higher priority than the input terminal 30 (third input terminal 33) that inputs the image signal of the image displayed in step S8. Are recognized as the first input terminal 31 and the second input terminal 32. Moreover, the main control part 45 makes the input selection part 41 select the 1st input terminal 31 which is the input terminal 30 with the highest priority in step S13, and implements step S14-S16 mentioned above. Here, the main control unit 45 recognizes that the input terminals having higher priority than the third input terminal 33 in step S12 are the first input terminal 31 and the second input terminal 32. In S <b> 16, it is determined that “N”, that is, all input terminals 30 having higher priority than the third input terminal 33 are not selected by the input selection unit 41. In step S16, when the main control unit 45 determines “N”, the main control unit 45 outputs a predetermined control signal to the input selection unit 41, and then inputs the input terminal 30 (second input terminal) having the next highest priority. 32) is selected by the input selection unit 41 (step S19). After step S19, the process proceeds to step S14 again.
As described above, even when an input switching operation is performed by the user, the main control unit 45 performs the input selection unit in descending order of priority in steps S11 to S19, as in the case of starting the projector 1 described above. While the input terminal 30 is selected by 41, the input state of the input terminal 30 is detected by the input state detection unit 42.
Steps S13 and S19 correspond to the selection step according to the present invention.

Further, for example, an external device (such as a personal computer) is connected to the first input terminal 31 and an image signal is supplied via the first input terminal 31. Thereafter, an input switching operation is performed by the user. If implemented, the main control unit 45 determines in step S15 that “Y”, that is, the first input terminal 31 is in the input state. In step S15, when the main control unit 45 determines “Y”, the main control unit 45 recognizes the first input terminal 31 as a priority input terminal, and passes through the priority input terminal (first input terminal 31). An image signal is input (step S20: input step).
Then, the main control unit 45 proceeds to step S8 after step S20, and displays video based on the image signal output from the external device (DVD player or the like) and input via the second input terminal 32 in step S8. To video display based on an image signal output from an external device (such as a personal computer) and input via a priority input terminal (first input terminal 31).

The first embodiment described above has the following effects.
In the present embodiment, the control device 40 configuring the projector 1 includes an input selection unit 41, an input state detection unit 42, a display control unit 44, a main control unit 45, and a memory 46. The input state of the input terminal 30 is detected while the input terminal 30 is selected, and the input terminal 30 (priority input terminal) that has a high priority and is in the input state where the image signal is input is selected, and the priority input is performed. A process of inputting an image signal through the terminal can be executed. As a result, it is possible to automatically switch to the input of a desired (high priority) image signal, without forcing the user to perform a complicated operation of performing the input switching operation a plurality of times. Improvement can be achieved.

  Further, the main control unit 45 performs selection control (selection steps S13 and S19, input steps S17 and S20) when an input switching operation is performed by the user. As a result, when an input switching operation is performed, the control device 40 selects a priority input terminal that has a high priority and is in an input state in which an image signal is input, and passes through the priority input terminal. Since the processing for inputting the image signal is executed, for example, if the priority of the first input terminal 31 for inputting the image signal supplied from an external device such as a personal computer is set to be high, an external device such as a personal computer is used. When a presentation is performed by displaying an image corresponding to an image signal supplied from the device, even if an input switching operation is mistakenly performed, the first input terminal 31 is selected again, and the presentation is performed. It is possible to prevent the display of an image corresponding to an image signal supplied from another external device that is not used.

  Further, the display control unit 44 performs selection control (selection steps S13, S19, input step S17) in the main control unit 45 by performing an input switching operation by the user while performing display control. When the same input terminal 30 is recognized as the priority input terminal again, the image D including the message D1 for invalidating the switching of the input of the image signal is displayed on the screen. As a result, the user recognizes that the currently displayed input is the highest priority input even if the displayed image is not switched despite the input switching operation. There is no recognition that the projector 1 has failed.

  In addition, the input state detection unit 42 performs image control via the predetermined input terminal 30 when display control is performed based on the image signal input via the predetermined input terminal 30 by the display control unit 44. It is always detected whether or not the input state is input. That is, the input state detection unit 42 can detect that the image signal is no longer input via the predetermined input terminal 30. When the input state detection unit 42 no longer detects that the predetermined input terminal 30 is in the input state, the main control unit 45 performs selection control (selection step S6, input step S7) again. . As a result, even when an image signal is no longer input via the predetermined input terminal 30, the input terminal 30 other than the predetermined input terminal 30 has a higher priority and the image signal is Since a priority input terminal that is in the input state is selected and an image signal is input through the priority input terminal, an image based on the image signal is displayed on the screen. Therefore, it is possible to always display an image based on the image signal on the screen. For example, it is supplied from another external device not used for the presentation without performing an input switching operation between presentations by a plurality of presenters. The predetermined image based on the image signal to be displayed can be automatically displayed on the screen.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
In the following description, the same structure and the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 5 is a block diagram showing a configuration of a projector 1 ′ as an image display device in the second embodiment.
In the first embodiment, the input state detection unit 42 detects whether or not the image signal is being input via the input terminal 30 selected by the input selection unit 41.
On the other hand, in the second embodiment, the input state detection unit 42 ′ is directly connected to the input terminals 31 to 34 and is in an input state in which an image signal is input to each of the input terminals 31 to 34. Detect all of them at once. The present embodiment differs from the projector 1 described in the first embodiment in the input state detection method by the input state detection unit 42 ′, and accordingly, by the main control unit 45 ′ as a selection control unit. Only the selection control is different, and other configurations are the same as those in the first embodiment.

  The input state detection unit 42 ′ collectively detects whether or not the input terminals 31 to 34 are in the input state according to a control signal from the main control unit 45. For example, similarly to the input state detection unit 42 described in the first embodiment, the input state detection unit 42 ′ checks the presence / absence of a synchronization signal included in the image signal, so that the input terminals 31 to 34 are connected. It is detected whether it is in an input state. Then, the input state detection unit 42 ′ outputs a signal corresponding to the input state or the non-input state to the main control unit 45 for each of the input terminals 31 to 34.

  The main control unit 45 ′ gives priority input to the input terminal 30 having a high priority based on the priority information stored in the memory 46 among the input terminals 30 detected as being in the input state by the input state detection unit 42 ′. Selection control is performed in which the input selection unit 41 selects the priority input terminal and inputs the image signal through the priority input terminal.

Next, the operation of the projector 1 ′ in the second embodiment will be described with reference to the drawings.
In the following, as the operation of the projector 1 ′, similarly to the first embodiment, the selection operation at the time of starting the projector 1 ′ and the selection operation at the time of the input switching operation will be described in order.
In the following, for convenience of explanation, setting of priority information and a connection state between the input terminal 30 and the external device are the same as those in the first embodiment.

[Selection operation at startup]
FIG. 6 is a flowchart for explaining the operation of the projector 1 ′ at startup.
When the power of the projector 1 ′ is turned on by the input operation of the operation unit 20 by the user and the projector 1 ′ is activated, the main control unit 45 ′ reads the control program stored in the memory 46, and according to the control program, The following processing is executed.
That is, the main control unit 45 ′ outputs a predetermined control signal to the input state detection unit 42 ′. Then, the input state detection unit 42 ′ collectively detects whether or not the input terminals 31 to 34 are in the input state in accordance with a control signal from the main control unit 45 ′ (step S21: input state detection). Step).
After step S21, the main control unit 45 ′ collectively determines whether or not the input terminals 31 to 34 are in the input state according to the signal output from the input state detection unit 42 ′. It is determined whether or not the input terminals 31 to 34 are in a non-input state (step S22).

In the present embodiment, depending on the connection state between the input terminal 30 and the external device as described above, the input state detection unit 42 ′ has the first input terminal 31 in the non-input state in step S 21 and other input terminals. 32 to 34 are detected to be in an input state, and a signal corresponding to each detected state is output to the main control unit 45.
In step S <b> 22, the main control unit 45 ′ determines that “N”, that is, only the first input terminal 31 is in the non-input state and the other input terminals 32 to 34 are in the input state.

In step S22, when the main control unit 45 ′ determines “N”, the priority information stored in the memory 46 is read out in the same manner as in step S1 described in the first embodiment, and the input terminals 31 to 31 are read. Recognize 34 priorities.
After step S <b> 1, the main control unit 45 selects the input terminal 30 having the highest priority among the input terminals 30 (input terminals 32 to 34) detected as being in the input state by the input state detection unit 42 ′ In the embodiment, by setting the priority information as described above, the second input terminal 32) is recognized as a priority input terminal, and a predetermined control signal is output to the input selection unit 41. Then, the input selection unit 41 selects a priority input terminal (second input terminal 32), and inputs an image signal via the priority input terminal (second input terminal 32) (step S23: selection input step). .
That is, steps S1 and S23 correspond to the selection input step according to the present invention.

  After step S23, the main control unit 45 ′ outputs a predetermined control signal to the signal conversion unit 43 and the display control unit 44 in the same manner as in step S8 described in the first embodiment, so that the external device (DVD player) Etc.) is displayed based on the image signal output from the priority input terminal (second input terminal 32).

In step S8, after the image based on the image signal via the priority input terminal (second input terminal 32) is displayed on the screen and the projector 1 ′ is driven, the main control unit 45 returns to step S21 again. Steps S21, S22, S1, and S23 are repeated.
That is, the main control unit 45 ′ recognizes the second input terminal 32 as the priority input terminal in step S23 while the image signal is supplied via the priority input terminal (second input terminal 32). In step S8, the video display based on the image signal output from the external device (DVD player or the like) and input via the priority input terminal (second input terminal 32) is continued.

On the other hand, the main control unit 45 ′, when the image signal is no longer supplied via the priority input terminal (second input terminal 32) (for example, the external device connected to the second input terminal 32 is removed). In this case, in step S23, the input terminal 30 (in this embodiment, the third input terminal 33 according to the setting of the priority information described above) associated with “3” having the next highest priority is set as the priority input terminal. In step S8, from the video display based on the image signal output from the external device (DVD player or the like) and input via the second input terminal 32, it is output from the external device (S signal video tape recorder or the like). The display is switched to video display based on the image signal input via the priority input terminal (third input terminal 33).
That is, the main control unit 45 ′ performs display control based on the image signal input from the display control unit 44 via the predetermined input terminal (second input terminal 32), as in the first embodiment. When the predetermined input terminal (second input terminal 32) is no longer detected in the input state by the input state detection unit 42, the selection control is again performed (selection input steps S1 and S23). To implement.

[Selection operation during input switching operation]
FIG. 7 is a flowchart for explaining the operation of the projector 1 ′ during the input switching operation.
When the video display based on the image signal output from the external device (DVD player or the like) and input through the priority input terminal (second input terminal 32) is performed in step S8 described above, the main control unit 45 ' Similarly to step S10 described in the first embodiment, it is constantly monitored whether or not an operation signal as input switching information from the input switching unit 21 is input.

In step S10, the main control unit 45 ′ outputs a predetermined control signal to the input state detection unit 42 ′ when it determines “Y”, that is, when an input switching operation is performed by the user. Then, the input state detection unit 42 'collectively detects whether or not the input state is set for each of the input terminals 31 to 34 in accordance with a control signal from the main control unit 45' (step S24: input state detection). Step).
After step S24, the main control unit 45 'collectively determines whether or not the input terminals 31 to 34 are in the input state according to the signal output from the input state detection unit 42'. It is determined whether or not there is an input terminal 30 having a higher priority than the input terminal 30 (second input terminal 32) to which the image signal of the image displayed in step S8 is input. Determination is made (step S25).

In the present embodiment, due to the connection state between the input terminal 30 and the external device as described above, the input state detection unit 42 ′ has the first input terminal 31 in the non-input state in step S 24, and other input terminals. 32 to 34 are detected to be in an input state, and a signal corresponding to each detected state is output to the main control unit 45.
Then, the main control unit 45 ′ determines that only the first input terminal 31 is in the non-input state and the other input terminals 32 to 34 are in the input state. In step S25, the main control unit 45 ′ inputs “N”, that is, the image signal of the image displayed in step S8 among the input terminals 30 (input terminals 32 to 34) in the input state. The input terminal 30 (second input terminal 32) is determined to be the input terminal 30 with the highest priority, and the second input terminal 32 is recognized as the priority input terminal.

  In step S25, if the main control unit 45 ′ determines “N”, a predetermined control signal (predetermined OSD command) is sent to the display control unit 44 as in step S18 described in the first embodiment. To display the image D on the screen.

Here, for example, an external device (personal computer) is connected to the first input terminal 31 and an image signal is supplied via the first input terminal 31. Thereafter, an input switching operation is performed by the user. In the case where it has been implemented, in step S25, the main control unit 45 ′ makes “Y”, that is, the input terminal 30 (second input terminal 32) to which the image signal of the image displayed in step S8 is input. It is determined that there is an input terminal 30 (first input terminal 31) having a higher priority than (). In step S25, when the main control unit 45 ′ determines “Y”, the main control unit 45 ′ recognizes the first input terminal 31 as the priority input terminal, and passes through the priority input terminal (first input terminal 31). Then, an image signal is input (step S26: selection input step).
Then, after step S26, the main control unit 45 'proceeds to step S8, and the video based on the image signal output from the external device (DVD player or the like) and input via the second input terminal 32 in step S8. The display is switched to video display based on an image signal output from an external device (such as a personal computer) and input via a priority input terminal (first input terminal 31).

The second embodiment described above has the following effects in addition to the same effects as those of the first embodiment.
In the present embodiment, the input state detection unit 42 ′ collectively detects whether or not the input terminals 31 to 34 are in the input state. As a result, the main control unit 45 ′ allows the input state detection unit 42 to change the input state of the input terminal 30 while allowing the input selection unit 41 to select the input terminal 30 in order of the priority described in the first embodiment. Without performing control to be detected, the input terminal 30 detected as being in the input state by the input state detection unit 42 ′ can easily be the input terminal 30 having a high priority based on the priority information as the priority input terminal. Can be recognized. For this reason, the processing load of the main control unit 45 ′ can be reduced.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In each of the above-described embodiments, the plurality of input terminals 30 are configured by the four input terminals 31 to 34. However, the number of input terminals 30 is not limited to four, but may be two or three, or five. It may be above. Moreover, although the Dsub terminal, D terminal, S terminal, 1 RCA terminal, etc. were adopted as the plurality of input terminals 30, the present invention is not limited to this, and other terminals, for example, 3RCA terminal, 5RCA terminal, and digital signals are input. DVI terminal for connection, 100BASE-T / 10BASE-T terminal for connection with a LAN (Local Area Network) cable, a card slot for detaching a LAN card, etc., various terminals for connection with a storage device (for example, USB (Universal Serial Bus) compatible hard disk, USB terminal for connecting to USB memory, etc.) may be adopted.

In each of the above embodiments, the order of the flows of FIGS. 2, 3, 6, and 7 may be changed as appropriate.
In each of the above embodiments, the message D1 shown in FIG. 4 is not limited to the message described in each of the above embodiments (“the input currently being displayed is the input with the highest priority”), but switching of the input of the image signal. Other information may be used as long as the warning information is invalid.

In each of the above embodiments, the transmissive liquid crystal panel (the liquid crystal light valve 12) is employed. However, the present invention is not limited to this, and a reflective liquid crystal panel may be employed, or a digital micromirror device ( (Trademark of Texas Instruments) may be employed.
In each of the above-described embodiments, the three liquid crystal light valves 12 are provided. However, the present invention is not limited to this, and only one liquid crystal light valve 12 is provided. Two liquid crystal light valves 12 are provided. The liquid crystal light valve 12 described above may be provided.

  In each of the embodiments, the front projection type projector is adopted as the image display device. However, the present invention is not limited to this, and any image display device including a plurality of input terminals 30 may be used. Further, it may be a television receiver provided with display means such as a plasma television, an organic EL (Electro Luminescence) display, or a rear projection type rear projector.

Furthermore, the best configuration for carrying out the present invention has been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

  Since the present invention can improve convenience, it can be used for an image display device such as a projector used for a presentation or home theater.

FIG. 2 is a block diagram illustrating a configuration of a projector according to the first embodiment. 6 is a flowchart for explaining the operation of the projector at the time of startup in the embodiment. 6 is a flowchart for explaining the operation of the projector during an input switching operation in the embodiment. The figure for demonstrating operation | movement of the projector at the time of input switching operation in the said embodiment. The block diagram which shows the structure of the projector in 2nd Embodiment. 6 is a flowchart for explaining the operation of the projector at the time of startup in the embodiment. 6 is a flowchart for explaining the operation of the projector during an input switching operation in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1 '... Projector (image display apparatus), 10 ... Image projection part (display means), 20 ... Operation part (setting input means), 30, 31-34 ... Input terminal, 40 ... Control device (control means), 41 ... Input selection unit, 42, 42 '... Input state detection unit, 44 ... Display control unit, 45, 45' ... Main control unit, 46 ... Memory (priority information storage unit), S1, S2, S6, S13, S19 ... Selection step, S3, S14, S21, S24 ... Input state detection step, S7, S17, S20 ... Input step, S8 ... display step, S1, S23, S26 ... selection input step.

Claims (9)

Display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and an image based on the image information input via any one of the plurality of input terminals An image display device comprising control means for displaying on the display means,
The control means includes
An input selection unit that selects any one of the plurality of input terminals;
A priority information storage unit that is set for each of the plurality of input terminals and stores priority information related to priority when selecting the input terminals;
An input state detection unit for detecting whether or not the image information is input through the input terminal selected by the input selection unit;
The input selection unit is made to select the input terminals in descending order of priority based on the priority information, and the input terminal detected by the input state detection unit as being in the input state is preferentially used for the image information. A selection control unit that recognizes a priority input terminal to be input and performs selection control to input the image information through the priority input terminal;
An image display apparatus comprising: a display control unit that performs display control for displaying an image on the display unit based on the image information input via the priority input terminal. Display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and an image based on the image information input via any one of the plurality of input terminals An image display device comprising control means for displaying on the display means,
The control means includes
An input selection unit that selects any one of the plurality of input terminals;
A priority information storage unit that is set for each of the plurality of input terminals and stores priority information related to priority when selecting the input terminals;
An input state detection unit for detecting whether or not the image information is input for each of the plurality of input terminals;
Among the input terminals detected as being in the input state by the input state detection unit, an input terminal having a high priority based on the priority information is recognized as a priority input terminal for preferentially inputting the image information. A selection control unit that performs selection control for causing the input selection unit to select the priority input terminal and inputting the image information via the priority input terminal;
An image display apparatus comprising: a display control unit that performs display control for displaying an image on the display unit based on the image information input via the priority input terminal. The image display device according to claim 1 or 2,
Setting input means for setting and inputting input switching information for selecting the other input terminal and switching the input of the image information;
The image display apparatus, wherein the selection control unit performs the selection control when the input switching information is set and input to the setting input unit. The image display device according to claim 3,
The display control unit performs the display control based on the image information input via a predetermined input terminal, and the selection is performed when the input switching information is set and input to the setting input unit. Warning information indicating that switching of the input of the image information is invalidated when the selection control is performed by the control unit and the predetermined control terminal recognizes that the predetermined input terminal is the priority input terminal. An image display device, characterized in that an image based on the above is displayed on the display means. The image display device according to any one of claims 1 to 4,
The selection control unit is configured such that when the display control is performed based on the image information input by the display control unit via a predetermined input terminal, the input state detection unit detects the predetermined input terminal. When the input state is no longer detected, the selection control is performed again. Display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and an image based on the image information input via any one of the plurality of input terminals A control method for an image display device comprising control means for displaying on a display means,
The control means is
A selection step of selecting the input terminals in descending order of priority based on priority information relating to priority when the input terminals are selected and set for the plurality of input terminals;
An input state detection step for detecting whether or not the image information is input through the input terminal selected in the selection step;
An input step of recognizing the input terminal detected as being in the input state in the input state detection step as a priority input terminal for preferentially inputting the image information and inputting the image information via the priority input terminal When,
And a display step of displaying an image on the display means based on the image information input via the priority input terminal. Display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and an image based on the image information input via any one of the plurality of input terminals A control method for an image display device comprising control means for displaying on a display means,
The control means is
An input state detecting step for detecting whether or not the image information is input for each of the plurality of input terminals;
Among the input terminals detected in the input state detection step in the input state detection step, the priority is high based on the priority information related to the priority when the input terminal is selected and set for each of the plurality of input terminals. A selection input step of recognizing an input terminal as a priority input terminal for preferentially inputting the image information, selecting the priority input terminal, and inputting the image information via the priority input terminal;
And a display step of displaying an image on the display means based on the image information input via the priority input terminal. Display means for displaying an image based on image information, a plurality of input terminals for inputting the image information, and an image based on the image information input via any one of the plurality of input terminals A control program for an image display device comprising control means for displaying on a display means,
A control program causing the control means to execute the control method according to claim 6 or 7.   9. A recording medium on which a control program according to claim 8 is recorded so as to be readable by a computer.

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