JP2010176060A - Display, projector, and method for switching video source of display, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display for easily performing video source switching operation and quickly displaying a desired video, to provide a projector, and to provide a method and a program for switching video sources of the display. <P>SOLUTION: The display includes: a plurality of video source terminals T; a signal monitoring part 51 for monitoring presence/no presence of signals input to respective video source terminals T; a terminal selection part 57 for selecting the video source terminal T to be a display target on the basis of the monitored result of the signal monitoring part 51; and a projecting optical system 70 for projecting and displaying a video based on the signal input from the video source terminal T to be the display target. When a no-signal terminal which is a video source terminal to which no signal is input is switched to a signal presence terminal which is a video source terminal to which a signal is input, the terminal selection part 57 selects the signal presence terminal as a display target. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device including a plurality of video source terminals, a projector, a video source switching method for the display device, and a program.

A projector usually includes a plurality of video source terminals. For example, a computer input terminal using a personal computer as a video source, a video input terminal using a video player as a video source, a LAN terminal for inputting a signal via a LAN (wireless or wired), and the like. Therefore, the user needs to select a desired video source from a plurality of video sources and perform projection display. Therefore, a method for easily searching which video source can be used from among a plurality of video sources and what kind of display is being performed has been proposed.
For example, Non-Patent Document 1 describes a method of automatically detecting and switching an input signal. In this method, when a video source switching operation (pressing an [input detection] button) is performed by a remote controller or the like, a video based on a video source next to the currently selected video source is displayed. Therefore, when a plurality of video sources are connected, it is necessary for the user to repeatedly switch the video sources until the target video is displayed.
However, when there are many video source terminals, it takes time to perform a switching operation for all the terminals. In Non-Patent Document 1, video display is not performed for video source terminals to which no signal is input. ing. That is, since only a video source terminal to which a signal is input is set as a switching target, a desired video source can be searched quickly.

OFFILIO PROJECTOR INSTRUCTION MANUAL EMP-1815 / 1810 2007 Edition (Epson Sales Co., Ltd. Seiko Epson Co., Ltd., page 17 “Switching Projected Images”)

  However, since the search method described in Non-Patent Document 1 does not switch to a video source terminal to which no signal is input as described above, when switching to a video source that is not connected, first, the video source Must be connected (input a signal to the video source terminal), and then the [Detect Input] button must be pressed. That is, two operations are required to switch the video source, and the operation is complicated. In the search method described in Non-Patent Document 1, it is necessary to detect whether or not a signal is input from the next video source every time a switching operation is performed. In some cases, the video display takes time.

  In view of the above problems, the present invention provides a display device, a projector, a video source switching method for a display device, and a program capable of easily performing a video source switching operation and quickly displaying a desired video. The purpose is to provide.

  The display device of the present invention includes a plurality of video source terminals, a signal monitoring unit that monitors the presence or absence of a signal input to each video source terminal, and a video source terminal that is a display target based on the monitoring result of the signal monitoring unit A video source terminal selection means for selecting a video signal and a display means for displaying video based on a signal input from the video source terminal to be displayed, wherein the signal monitoring means is a video source terminal that has no signal input. When it is detected that the terminal without signal is switched to the terminal with signal that is the video source terminal with signal input, the video source terminal selection means selects the terminal with signal as a display target.

  A video source switching method for a display device according to the present invention is a video source switching method for a display device having a plurality of video source terminals, the step of monitoring the presence or absence of a signal input to each video source terminal, and each video Based on the monitoring result of the source terminal, if it is detected that the no-signal terminal, which is a video source terminal without a signal input, is switched to a terminal with a signal, which is a video source terminal with a signal input, the terminal with the signal is A step of selecting as a display target, and a step of displaying a video based on a signal input from a video source terminal to be displayed.

According to these configurations, when it is detected that a no-signal terminal that is a video source terminal without a signal input is switched to a signal-provided terminal that is a video source terminal with a signal input, it is input from the terminal with the signal. If the user wants to switch to a video source that is not connected, the user can simply connect the video source (input the signal to the video source terminal) and use the [Detect Input] button. Since it is not necessary to press down, the operation is easy. Along with this, a desired video (video based on a signal from an unconnected video source) can be quickly displayed. When the video source is in the power off state, it is handled as a no-signal terminal. Therefore, if the video source is in such a state, the video source can be switched by simply turning on the device that supplies the video source. be able to.
The display means preferably displays the video source name together with the video based on the signal input from the video source terminal to be displayed.

  In the display device described above, when the signal monitoring unit detects that the terminal with the signal is switched to the terminal without the signal, the video source terminal selection unit selects any one of the other terminals with the signal. It is preferable to select a terminal with a signal as a display target.

  According to this configuration, when switching from the video source currently being displayed to another video source, it is only necessary to disconnect the video source (or the device that supplies the video source is in a power-off state. The operation is easy. Along with this, a desired video can be quickly displayed.

  In the display device described above, based on the monitoring result of the signal monitoring means, further comprising grouping means for grouping a plurality of video source terminals into a group with a signal and a group without a signal, the signal monitoring means, When it is detected that the terminal with signal is switched to the terminal without signal, the video source terminal selection means preferably selects any one terminal with signal from the group with signal as a display target.

  According to this configuration, since any one signal terminal is selected as a display target from the signal group, as compared with the case where the presence / absence of signal input is sequentially detected for all video sources. The video can be displayed quickly. This configuration is effective when the number of video source terminals is large.

  In the display device described above, the plurality of video source terminals have a priority, and when the signal monitoring unit detects that the terminal with the signal is switched to the terminal without the signal, the video source terminal selecting unit It is preferable to select the terminal with the signal with the highest priority from the group with signals as the display target.

  According to this configuration, it is possible to more quickly switch to a desired video source by setting priorities in the order of high usage frequency.

  The display device described above further includes an operation unit for performing a switching operation for switching the video source, and the video source terminal selection unit is selected from the group with a signal as a display target until then by using the switching operation as a trigger. It is preferable to select a terminal with a signal having the next highest priority after the video source terminal that has been set as a display target.

  According to this configuration, since a video source is sequentially switched from a group with a signal according to a priority order, a desired video can be searched more quickly.

  In the display device described above, it is preferable that the display unit displays a list of video source terminals belonging to the group with signal according to the priority order.

According to this configuration, since the list of video source terminals belonging to the group with signal is displayed according to the priority order, the user can determine whether there is a signal of each video source (which video source is usable) and the switching order. And can be grasped.
The list of video source terminals belonging to the group with signal is preferably displayed when the power is turned on or when the switching operation is performed. Further, a button for instructing a list display may be provided, and display is possible by pressing the button.

  A projector according to the present invention is characterized by including each unit in the display device described above.

  The program of the present invention is for causing a computer to execute each step in the video source switching method of the display device described above.

  According to these configurations, a video source switching operation can be easily performed, and a video source switching method for a projector and a display device that can quickly search for a desired video source can be realized.

It is a block diagram which shows the structure of the projector which concerns on one Embodiment of this invention. It is a figure for demonstrating the priority of a video source terminal, grouping, and the switching order. It is a flowchart which shows the video display process of a projector. FIG. 4 is a flowchart illustrating a video source switching process, which is the subroutine of FIG. 3. FIG. It is a figure which shows the example of a display of a terminal list with a signal. It is a figure which shows the example of a display of a terminal list with a signal. It is a figure which shows the other example of a display of a terminal list with a signal. It is a figure which shows the modification of a terminal list | wrist with a signal.

  Hereinafter, a display device, a projector, a video source switching method for the display device, and a program according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a projector is illustrated as an example of a display device. However, as long as it includes a plurality of video source terminals, other projectors such as a rear projector and various display devices that are integrally provided with a transmissive screen are included. The present invention can also be applied to a display device.

  FIG. 1 is a block diagram showing the configuration of the projector 10. As shown in the figure, the projector 10 includes a plurality of video source terminals (signal input terminals) T, a signal monitoring unit 51, an operation unit 52, a remote control receiving unit 62, a control unit 53, a storage unit 54, a power supply unit 55, a lamp. Drive unit 56, terminal selection unit 57, video converter 58, video signal processing unit 59, video signal correction unit 60, light valve drive unit 61, bus line 65, frame memory 68, OSD (On Screen Display) memory 69, and projection optics A system 70 is provided. The projection optical system 70 includes a light source lamp 71, a liquid crystal light valve 72, and a projection lens 73.

  In the projector 10 of the present embodiment, as the video source terminal T, the computer 1 input terminal T1, the computer 2 input terminal T2, and the S-video input terminal T3 corresponding to the S signal are compatible with analog RGB signals and component signals. And a video input terminal T4 and a LAN terminal T5 corresponding to the composite signal. In addition, as the video source terminal T, terminals such as a C-video input terminal, a BNC terminal, an HDMI terminal, and a USB terminal may be further provided.

  The signal monitoring unit 51 monitors the presence / absence of a signal input to each video source terminal T. “Signal monitoring means” in the claims refers to the signal monitoring unit 51. Specifically, whether or not a video signal (hereinafter also simply referred to as “signal”) is supplied from each video source 20 is identified by detecting the presence or absence of a synchronization signal included in the video signal, An identification signal indicating the identification result is output to the control unit 53.

  The operation unit 52 is for a user to perform various operations, and includes an operation panel provided in the main body of the projector 10. The remote control receiving unit 62 is for transmitting and receiving signals to and from the remote control 63. The “operation means” in the claims refers to the operation unit 52 and the remote controller 63. On the operation unit 52 and the remote controller 63, a [power] button for turning on / off the power, an [input detection] button for switching the video source 20, and a list of video source terminals T to which signals are input are displayed. [List display] button and the like (both not shown). In the following description, the video source terminal T to which a signal is input is referred to as a “signal present terminal”, and the video source terminal T to which no signal is input is referred to as a “no signal terminal”.

  The control unit 53 is configured by a CPU (Central Processing Unit), and controls the entire projector 10 by inputting / outputting signals to / from each unit via the bus line 65. In addition, the control unit 53 selects a plurality of video source terminals T based on the monitoring result of the signal monitoring unit 51 (identification signal acquired from the signal monitoring unit 51) as “a group with signal” to which a signal is input, A grouping process for grouping into “signalless groups” in which no signal is input is performed (grouping means). The grouping process is executed as needed with the acquisition of the identification signal. Further, the control unit 53 selects the video source terminal T to be displayed based on the result of the grouping process or the operation of the operation unit 52.

  The storage unit 54 is configured by a non-volatile memory capable of rewriting data, such as a flash memory, and stores a control program and control data for the control unit 53 to perform various controls. The control program includes a “video source switching processing program” for switching the video source 20 based on the monitoring result of the signal monitoring unit 51 and the video signal switching command from the operation unit 52. In addition, the storage unit 54 includes a priority storage area 66 that defines the priority of each video source 20 and a grouping result storage area 67 that stores the grouping results grouped by the control unit 53.

  As shown in FIG. 2A, the priority storage area 66 stores the priorities of a plurality of video source terminals T (T1 to T5) provided in the projector 10. In this embodiment, it is assumed that priorities are defined in the order of the computer 1 input terminal T1, the computer 2 input terminal T2, the S-video input terminal T3, the video input terminal T4, and the LAN terminal T5.

  In the grouping result storage area 67, as shown in FIG. 2B, the video source terminals T belonging to the “group with signal” and “group without signal” are stored. In the figure, a video signal is input to the computer 1 input terminal T1, the computer 2 input terminal T2, and the S-video input terminal T3, and no video signal is input to the video input terminal T4 and the LAN terminal T5 (corresponding video source). 20 is not connected or the power is off). For example, when the [input detection] button of the operation unit 52 is pressed in the grouped state as shown in FIG. 2B, as shown in FIG. Display objects are sequentially selected from the video source terminals T1, T2, and T3 in accordance with the priority order shown in FIG. Details will be described later.

  The terminal selection unit 57 selects the video source terminal T to be displayed based on a command from the control unit 53. That is, the input selector (not shown) is switched to the selected video source terminal T. Note that “video source terminal selection means” in the claims refers to the control unit 53 and the terminal selection unit 57.

  The power supply unit 55, the lamp driving unit 56, the video converter 58, the video signal processing unit 59, the video signal correction unit 60, the light valve driving unit 61, and the projection optical system 70 are well-known configurations (for example, Japanese Patent Laid-Open No. 2006-2006). Detailed description thereof is omitted.

  Next, the video display processing of the projector 10 will be described with reference to the flowcharts of FIGS. 3 and 4. Further, the description will be supplemented with reference to the projection display examples of FIGS. 5 and 6 as appropriate. First, when the projector 10 is powered on, the signal monitoring unit 51 starts monitoring all the video source terminals T (S01). Further, the control unit 53 groups the video source terminals T into “group with signal” or “group without signal” based on the identification signal based on the monitoring result of the signal monitoring unit 51 (S02).

  Here, the control unit 53 determines whether or not there is a terminal with a signal (S03), and when it exists (S03: Yes), the video source terminal with the highest priority in the “group with signal”. T is selected (S04). Further, by switching the input selector by the terminal selection unit 57, an image based on the video signal input from the selected video source terminal T is projected and displayed (S06).

  For example, in the case of grouping as in the example shown in FIG. 2B, as shown in FIG. 5A, a list of terminals with signals belonging to the “group with signals” (corresponding to the terminals with signals). A list of video source names) 93 is superimposed and displayed on video (video display screen 91) from the computer 1 input terminal. Hereinafter, this display is referred to as “superimposition list 93”. In the superimposition list 93, the video source name corresponding to the currently selected video source terminal T is enclosed in a square, and the video source name corresponding to the video source terminal T in the non-selected state has a predetermined mark ( In the illustrated example, a triangle pointing rightward) is added. These video source names are listed in order from the top according to the priority order of the video source terminals T shown in FIG. Note that when the display of the superimposition list 93 is started, a timer (not shown) starts counting and is erased after a predetermined time.

  On the other hand, when there is no signal present terminal (S03: No), the previous video source terminal T is selected (S05), and a standby screen 92 (for example, a blue solid screen) based on the video source terminal T is displayed ( S06). In other words, the projector 10 of the present embodiment stores the video source information selected at that time in a predetermined area of the storage unit 54 when the power is turned off, and reproduces when there is no signaled terminal at the next start-up. It can be done.

  For example, when the video source terminal T selected when the power is turned off last time is the computer 1 input terminal T1, the character information 94 is displayed on the standby screen 92 as shown in FIG. The character information 94 includes a video source name and a message indicating that the video source 20 has not been input.

  Subsequently, the control unit 53 determines whether or not the group configuration has changed based on the identification signal output from the signal monitoring unit 51 (S07). “Change in group configuration” refers to whether a terminal with a signal has changed to a terminal without a signal or a terminal without a signal has changed to a terminal with a signal. If there is a change in the group configuration (S07: Yes), the video source switching process is executed (S09).

  If there is no change in the group configuration (S07: No), it is determined whether or not a switching operation has been performed (S08). That is, in this step, it is determined whether or not the [input detection] button is pressed. Here, when a switching operation is performed (S08: Yes), a video source switching process is executed (S09).

  After the video source switching process is finished, it is determined whether or not the power is turned off (S10). If the power source is pressed (S10: Yes), the video display process is finished. On the other hand, if not pressed, S07 and subsequent steps are repeated. As described above, the projector 10 always keeps monitoring by the signal monitoring unit 51 during activation, and executes the video source switching process when the grouping configuration is changed or when a switching operation is performed.

  Next, the video source switching process corresponding to S09 of FIG. 3 will be described with reference to the flowchart of FIG. In the video source switching process, when a terminal without a signal changes to a terminal with a signal (S21: Yes), the terminal changes to a terminal with a signal (the video source 20 in the connected state has changed from the power-off state to the power-on state). The video source terminal T is selected as a display target (S22).

  Conversely, when the terminal with signal changes to the terminal without signal (S23: Yes), the video source terminal T having the highest priority in the group with signal is selected as a display target (S24).

  Furthermore, when the switching operation is performed (S25: Yes), the video source terminal T having the second highest priority after the video source terminal T currently being displayed is selected as the display target in the group with signal. (S26).

  After S22, S24, and S26, an image based on the video signal input from the selected video source terminal T is projected and displayed (S27). For example, as shown in FIG. 5A, when the “computer 1 input terminal” is a display target and the “video input terminal” changes from a terminal without a signal to a terminal with a signal, The display of the list 93 is as shown in FIG. Further, in the state shown in FIG. 5A, when the “computer 1 input terminal” is changed from the terminal with signal to the terminal without signal, the superimposition list 93 is displayed as shown in FIG. Become. At this time, the displayed video is a video from the “computer 2 input terminal” which is the video source terminal T having the highest priority in the group with signal. Further, in the state shown in FIG. 5A, when the [Detect Input] button is pressed, the display target is switched to “Computer 2 Input Terminal”, and the superimposition list 93 is displayed as shown in FIG. It will be in the state shown in

  The terminal list with signal 93 can be displayed on the screen as shown by reference numeral 95 in FIG. 7B instead of being superimposed on the video. Hereinafter, the screen 95 is referred to as a “screen display list”. The screen display list 95 is displayed when the [List display] button of the operation unit 52 is pressed. In the display example of the figure, the shaded video source name ("computer 1" in the illustrated example) is currently selected by the terminal selection unit 57 as a display target. Therefore, when the [OK] button is pressed in the state shown in the figure, an image based on the image signal from the “computer 1” is projected and displayed. It is also possible to select another video source terminal T by pressing the [cursor] button and the [decision] button while the screen display list 95 is displayed. The screen display list 95 may be deleted after a predetermined time has elapsed from the start of display, or may be deleted when an erasing operation is performed. When the [List Display] button is pressed during video display, the screen display list 95 may be displayed superimposed on the video.

  As described above, according to the projector 10 of the present embodiment, when a terminal without a signal is switched to a terminal with a signal, an image based on a signal input from the terminal with a signal is displayed. If it is desired to switch to the video source 20 in the state, it is only necessary to connect the video source 20 (or turn on the video source 20), and it is not necessary to press the [Detect Input] button. Video can be displayed. In addition, when switching from the video source 20 currently being displayed to another video source 20, it is only necessary to release the connection of the video source 20 (or to turn off the power of the video source 20). Easy to operate.

  Also, the state of the video source terminal T is constantly monitored, and each video source terminal T is grouped into a “group with signal” and a “group without signal”, and only the “group with signal” is targeted. Since switching is performed, it is not necessary to sequentially detect the presence or absence of signal input to the video source terminals T belonging to the “no signal group”, and a desired video can be displayed quickly.

  In addition, since the lists 93 and 95 of the video source terminals T belonging to the group with signal are displayed according to the priority order, the user can indicate whether or not there is a signal from each video source 20 (which video source 20 can be used). The switching order can be grasped. Furthermore, since only the video source terminals T belonging to the group with signal are displayed in the superimposition list 93, even the projector 10 provided with a large number of video source terminals T does not hinder the visual recognition of the video.

  In the above embodiment, as the superimposition list 93 or the screen display list 95, the list display in which only the video source terminals T belonging to the “group with signal” are listed is performed. As indicated by reference numeral 96, the video source terminals T belonging to each group may be listed in “group with signal” and “group without signal”. According to this configuration, the user can grasp the presence / absence of signal input of all the video source terminals T at a glance.

  Further, as indicated by reference numeral 97 in FIG. 8B, not only the presence / absence of signal input, but also the state of a signalless terminal belonging to a “no signal group” may be confirmed. In the example shown in the figure, it is displayed so that the user can distinguish between “power off” and “no connection (not physically connected to the video source terminal T)”.

  In the above embodiment, when the power source of the video source 20 is turned on from off, or when the power source of the video source 20 is turned off from on, the projector 10 detects these and detects the video source 20. If the video source 20 is in a standby state and does not output a signal when the video source 20 is in a standby state, when the video source 20 cancels the standby state or returns from the standby state to the normal state, the video source You may make it perform 20 switching processes.

  Moreover, it is possible to provide each part in the projector 10 shown in said embodiment as a program. Further, the program can be provided by being stored in a recording medium (not shown). That is, a program for causing a computer to function as each unit of the projector 10 and a recording medium recording the program are also included in the scope of the right of the present invention. Other modifications can be made as appropriate without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Projector 20 ... Image | video source 51 ... Signal monitoring part 52 ... Operation part 53 ... Control part 54 ... Memory | storage part 57 ... Terminal selection part 66 ... Priority order memory | storage area | region 67 ... Grouping result memory | storage area 70 ... Projection optical system 91 ... Image | video display Screen 92 ... Standby screen 93 ... List for superimposition 95 ... List for screen display SC ... Screen T ... Video source terminal

Claims (9)

Multiple video source terminals,
Signal monitoring means for monitoring the presence or absence of a signal input to each video source terminal;
Video source terminal selection means for selecting a video source terminal to be displayed based on the monitoring result of the signal monitoring means;
Display means for displaying a video based on a signal input from the video source terminal to be displayed,
When the signal monitoring means detects that a signalless terminal that is a video source terminal without a signal input is switched to a signaled terminal that is a video source terminal with a signal input, the video source terminal selecting means is: A display device, wherein the terminal with a signal is selected as the display target.   When the signal monitoring unit detects that the terminal with the signal is switched to the terminal without the signal, the video source terminal selecting unit selects any one of the terminals with the signal from the other terminals with the signal. The display device according to claim 1, wherein the display device is selected as the display target. Further comprising grouping means for grouping the plurality of video source terminals into a group with a signal and a group without a signal based on a monitoring result of the signal monitoring means;
When the signal monitoring unit detects that the terminal with signal is switched to the terminal without signal, the video source terminal selecting unit selects one of the terminals with signal from the group with signal, The display device according to claim 2, wherein the display device is selected as the display target. The plurality of video source terminals have a priority;
When the signal monitoring unit detects that the terminal with signal is switched to the terminal without signal, the video source terminal selecting unit selects the terminal with signal having the highest priority from the group with signal. The display device according to claim 3, wherein the display device is selected as the display target. An operation means for performing a switching operation for switching the video source;
The video source terminal selection means uses the switching operation as a trigger to display a terminal with a signal having the next highest priority from the video source terminal that has been selected as the display target from the group with signals. The display device according to claim 4, wherein the display device is selected as a target.   The display device according to claim 4, wherein the display unit displays a list of video source terminals belonging to the group with a signal according to the priority order.   A projector comprising: each means in the display device according to claim 1. A video source switching method for a display device having a plurality of video source terminals,
Monitoring the presence or absence of a signal input to each video source terminal;
Based on the monitoring results of each video source terminal, if it is detected that a no-signal terminal that is a video source terminal that does not have a signal input is switched to a terminal that has a signal that is a video source terminal that has a signal input Selecting a terminal as the display target;
And a step of displaying a video based on a signal input from the video source terminal to be displayed.   The program for making a computer perform each step in the video source switching method of the display apparatus of Claim 8.

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