JP2013152261A - Image display unit and method for controlling image display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display unit having a plurality of image signal input terminals, and configured to display an image only when an image signal is input to all image input terminals set to be used.SOLUTION: Image signal detection means obtains signal detection states from all image input terminals set by use-terminal setting means 201 (step S104). If an image signal is detected at all of the image input terminals having been set (step S105: Y), image projection means projects an image according image signals input to image input terminals selected by image input selection means (step S106). Meanwhile, if an image signal is not detected at any of the image input terminals having been set (step S105: N), the image projection means projects an image signal detection state (step S107).

Description

  The present invention relates to an image display device and a method for controlling the image display device.

In an image display device having a plurality of image input terminals, a presentation may be performed while connecting different external devices to each image input terminal and switching between the plurality of image input terminals. At this time, if it is not confirmed in advance that image signals are input to all image input terminals, images will not be displayed when switching to an image input terminal that does not input image signals, and the presentation will fail. There is a risk of doing.
Patent Document 1 discloses a projector that displays signal input states of a plurality of image input terminals on a touch panel provided in a main body.

JP 2003-323168 A

  However, mounting the touch panel to display the signal input status of the image input terminal as in the projector of Patent Document 1 has a problem of increasing the cost.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An image display apparatus according to this application example includes a plurality of image input terminals to which image signals are input, an image display unit that displays an image based on the input image signals, and the plurality of image inputs. Use terminal setting means for setting an image input terminal to be used from among the terminals, and image signal detection means for detecting whether an image signal is input for each of the image input terminals set in the use terminal setting means, The image input selection means for selecting one of the image input terminals set in the use terminal setting means, and all the image input terminals set in the use terminal setting means by the image signal detection means When it is detected that an image signal is input to the image input means, an image based on the image signal input to one image input terminal selected by the image input selection means is displayed on the image display means. Characterized by comprising a control means for more display.

  According to this application example, when an image signal is input to all of the image input terminals set to be used in advance, the image is projected, so that the image signal is input to one of the image input terminals to be used. It is possible to avoid a situation in which the presentation is started in a state where it is not.

  Application Example 2 In the image display device according to the application example described above, in a state where an image is displayed by the image display unit, any of the image input terminals set in the use terminal setting unit is not detected as an image signal. It is further characterized by further comprising an informing means for informing when the state is reached.

  According to this application example, it is possible to immediately know the state in which the image signal is no longer detected at any of the image input terminals set to be used in advance during image projection by the notification unit.

  Application Example 3 In the image display device according to the application example, in the state where the control unit displays an image by the image display unit, any one of the image input terminals set in the use terminal setting unit When the image signal is not detected, a predetermined warning message is displayed by the image display means.

  According to this application example, when an image signal is no longer detected at any of the image input terminals set to be used in advance during image projection, a warning message indicates the image input terminal at which the image signal is no longer input. It becomes possible.

  Application Example 4 A method for controlling an image display device according to this application example includes a plurality of image input terminals to which image signals are input, an image display unit that displays an image based on the input image signals, Use terminal setting means for setting an image input terminal to be used from among a plurality of image input terminals, and an image for detecting whether an image signal is input for each of the image input terminals set by the use terminal setting means. An image input selection step of selecting any one of the image input terminals set by the use terminal setting means, and the image signal detection method. Selected by the image input selection step when it is detected by the means that image signals are input to all the image input terminals set in the use terminal setting means. It displays an image based on the image signal input to the image input terminal by the image display means, and having a control step.

  According to this application example, when an image signal is input to all of the image input terminals set to be used in advance, the image is projected, so that the image signal is input to one of the image input terminals to be used. It is possible to avoid a situation in which the presentation is started in a state where it is not.

1 is a block diagram showing a schematic configuration of a projector. The figure which shows the setting information of a use terminal setting means. (A) to (f) is a diagram showing screen transition of the projector. The flowchart which shows operation | movement when a projector starts. The flowchart which shows operation | movement when a projector receives input switching operation. 9 is a flowchart showing the operation of a scheduled task for monitoring the image signal detection state of the image input terminal set by the projector as the used terminal setting means. The schematic plan view which shows the operation key of an input operation means. The schematic plan view which shows the operation key of a remote control. The figure which shows the screen of the image signal undetected state of the modification 2.

  Hereinafter, a projector according to an embodiment of the present invention will be described with reference to the drawings. However, the following embodiments do not limit the invention according to the claims, and all combinations of features in the embodiments are described below. However, this is not always essential for the solution of the invention.

(First embodiment)
FIG. 1 is a block diagram illustrating a schematic configuration of a projector according to the present embodiment.
As shown in FIG. 1, the projector 100 includes an image input terminal 6, an image projection unit 10, an image signal detection unit 15, an OSD processing unit 16, an image signal processing unit 17, an image input selection unit 18, a control unit 20, and a storage unit. 21, a light source control unit 22, an input operation unit 23, an operation signal reception unit 24, a notification unit 26, and the like, which are housed inside or outside the casing (not shown).

  The image projection means 10 as an image display means includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive means 14, and the like. The image projection means 10 modulates the light emitted from the light source 11 with the liquid crystal light valves 12R, 12G, and 12B to form image light, and projects the image light from the projection lens 13 to project the image on the screen SC or the like. Is displayed.

The light source 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. ing.
Light emitted from the light source 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue, which are the three primary colors of light, by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 12R, 12G, and 12B, respectively.

The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. In the liquid crystal light valves 12R, 12G, and 12B, a plurality of pixels (not shown) arranged in a matrix are formed, and a driving voltage can be applied to the liquid crystal for each pixel.
When the liquid crystal driving unit 14 applies a driving voltage corresponding to the input image information to each pixel, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source 11 is modulated by passing through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light.
The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

  In the present embodiment, the projector 100 that projects using the light source lamp 11a as the light source is exemplified. However, the present invention can also be applied to a projector that projects using an LED (Light Emitting Diode) light source or a laser light source as the light source. it can.

  In the present embodiment, the image projection unit 10 is exemplified by a transmissive liquid crystal type projection optical system using three liquid crystal light valves 12R, 12G, and 12B as light modulators. You may employ | adopt the light modulation apparatus of other display systems, such as a micromirror device system (light switch display system).

  The control means 20 includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory) used for temporary storage of various data, and the like, according to a control program (not shown) stored in the storage means 21. By operating, the overall operation of the projector 100 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21. The control unit 20 includes a use terminal setting unit 201 that sets the image input terminal 6 to be used among the plurality of image input terminals 6.

The use terminal setting unit 201 sets which of the plurality of image input terminals 6 is used. An example of setting contents of the used terminal setting means 201 is shown in FIG.
As shown in FIG. 2, a video playback device (Video 1A, Video 2A), a personal computer (PC1, PC2, PC3), etc., which are external image supply devices (not shown), are connected to the image input terminals 61-65. Of these, it is set to use three image input terminals 61, 62 and 64 connected to PC1, PC2 and Video1A.

  Returning to FIG. 1, the storage means 21 is constituted by a rewritable nonvolatile memory such as a flash memory (not shown) or FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 100, various setting data for defining operation conditions of the projector 100, and the like.

  The input operation means 23 is provided on the outer surface of the main body housing of the projector 100 and receives an input operation from the user. The input operation means 23 includes a plurality of operation keys for the user to give various instructions to the projector 100. . The operation keys of the input operation means 23 are shown in FIG.

  As shown in FIG. 7, the operation keys provided in the input operation unit 23 include a power key 23 a for alternately switching on and off the power, and a plurality of image input terminals 6 by the image input selection unit 18. An input switching key 23b for switching to the image input terminal 6, a menu key 23c for superimposing a setting menu for performing various settings, a cursor key 23d for selecting a setting item from the menu, a decision key 23e, an escape key 23f and help key 23g.

The operation signal receiving unit 24 receives an operation signal from a remote controller (remote controller / RC) 25 that performs an input operation by remote operation, and outputs the operation content according to the user operation content to the control unit 20. The operation keys of the remote controller 25 are shown in FIG.
As shown in FIG. 8, as the operation keys provided in the remote controller 25, a power key 25a equivalent to the input operation means 23, an input switching key 25b, a menu key 25c, a cursor key 25d, an enter key 25e, an escape key 25f, a help key In addition to the 25g operation keys, there are a screen mute key 25h, a screen aspect ratio switch key 25i, a color mode switch key 25j, a number input key 25k, and the like.

  Image information is input to the plurality of image input terminals 6 from an external image supply device (not shown) such as a video playback device (Video 1A, Video 2A) or a personal computer (PC1, PC2, PC3) via a cable (not shown). The image information input to each image input terminal 6 is supplied to the image input selection means 18 and the image signal detection means 15.

  When the user designates one desired image input terminal 6 by operating the input switching key 23b provided in the input operation means 23, the control means 20 causes the image signal input to the one image input terminal 6 to be subjected to image signal processing. The image input selection means 18 is instructed to be output to the means 17.

  The image input selection means 18 selects one image input terminal 6 based on an instruction from the control means 20 among the plurality of image input terminals 6, and outputs an image signal input to the one image input terminal 6 as an image signal processing means. 17 to output.

  The image signal detection unit 15 controls the detection result of whether or not a valid image signal is input for each of the plurality of image input terminals 6 set by the use terminal setting unit 201 based on an instruction from the control unit 20. The means 20 is notified.

  The image signal processing means 17 converts the image information input from the image input selection means 18 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, 12B. Here, the converted image information is for each of the R, G, and B color lights, and is composed of a plurality of pixel values corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted is defined by this pixel value.

  The OSD processing unit 16 performs processing for superimposing and displaying an OSD (on-screen display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing unit 16 includes an OSD memory (not shown), and stores OSD image information representing graphics, fonts, and the like for forming an OSD image. When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 16 reads necessary OSD image information from the OSD memory, and outputs an image signal so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image information is synthesized with the image information input from the processing means 17. The image information combined with the OSD image information is output to the liquid crystal driving means 14. When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 16 outputs the image information input from the image signal processing unit 17 to the liquid crystal driving unit 14 as it is.

  When the liquid crystal driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image information input from the OSD processing unit 16, the liquid crystal light valves 12R, 12G, and 12B form images corresponding to the image information, An image is projected from the projection lens 13.

  The light source control unit 22 controls the supply and stop of power to the light source 11 based on an instruction from the control unit 20 to switch the light source 11 on and off.

  The notifying unit 26 is configured by an LED, a buzzer, or the like, and notifies that no image signal is input to any of the image input terminals 6 set by the use terminal setting unit 201.

Next, screen transition of the projector 100 according to the present embodiment will be described with reference to FIG.
FIG. 3 is a diagram showing an input switching operation and a screen transition when the image signal input state of the image input terminal 6 changes. In the example of FIG. 3, it is assumed that three image input terminals 61, 62, 64 (PC1, PC2, Video1A) set by the use terminal setting means 201 are used.
In the present embodiment, it is assumed that the image input terminal 6 set by the use terminal setting unit 201 is switched and selected in a predetermined order by the operation of the input switching key 23b (25b).

In FIG. 3A, the image input terminal 61 is selected immediately after the projector 100 is activated, an image signal is input from the PC 1 to the image input terminal 61, the image input terminal 62 connected to the PC 2, and the Video 1A is connected. The image input terminal 64 indicates a state in which no image signal is input.
As shown in FIG. 3A, the image input terminal 61 is selected and the image signal from the PC 1 is input. However, the image input terminal 62 and the image input terminal 64 set by the use terminal setting unit 201 are used. Since no image signal is input, an image based on the image signal input to the selected image input terminal 61 is not displayed. Instead, PC1 (image input terminal 61), PC2 (image input terminal 62) , Video 1A (image input terminal 64), the image signal input state from each is displayed as an image.

  FIG. 3B shows a state in which an image signal from Video 1A is further input to the image input terminal 64 from the state of FIG. Since no image signal is input to the image input terminal 62 set by the use terminal setting means 201, an image based on the image signal input to the selected image input terminal 61 is not displayed. Instead, PC1 Image signal input states from the (image input terminal 61), PC2 (image input terminal 62), and Video 1A (image input terminal 64) are displayed as images.

  FIG. 3C shows a state in which an image signal from the PC 2 is further input to the image input terminal 62 from the state of FIG. Since the image signal is input to all the three image input terminals 61, 62, 64 set by the use terminal setting means 201, the image signal from the PC 1 input to the selected image input terminal 61. An image based on is displayed.

  FIG. 3D shows a state where the input switching key 23b (25b) is further operated from the state shown in FIG. When an instruction to switch the image input terminal 6 is received by the input switch key 23b (25b), the image input terminal 62 next to the image input terminal 61 is selected based on the information set by the use terminal setting means 201 and input from the PC 2 An image based on the image signal being displayed is displayed.

  FIG. 3 (e) shows a state in which the input switching key 23b (25b) is further operated from the state of FIG. 3 (d). When an instruction to switch the image input terminal 6 is received by the input switch key 23b (25b), the next Video 1A (image input terminal 64) of the PC 2 (image input terminal 62) is based on the information set by the use terminal setting means 201. An image based on the image signal selected and input from the Video 1A to the image input terminal 64 is displayed.

FIG. 3F shows a state in which the image signal from the PC 2 is no longer input to the image input terminal 62 from the state of FIG. While the image from Video 1A is being displayed, the image signal from PC 2 is no longer input to image input terminal 62 set by use terminal setting means 201, so that the image signal input to selected image input terminal 64 And the message indicating that the image signal input from the PC 2 to the image input terminal 62 is in an undetected state, PC1 (image input terminal 61), PC2 (image input terminal 62), and Video1A. The image signal input state from each (image input terminal 64) is displayed as an image.
In the state of FIG. 3F, when an image signal is input again from the PC 2 to the image input terminal 62, the process proceeds to FIG.

  Next, the operation of the projector 100 of the present embodiment will be described using the flowcharts of FIGS. 4 is an operation when the projector 100 is activated, FIG. 5 is an operation when the projector 100 receives an input switching operation, and FIG. 6 is an input to the image input terminal 6 set by the use terminal setting unit 201. 5 is a flowchart showing the operation of a scheduled task for monitoring the detection state of image signals. 4 to 6, “image input terminal 6” is also referred to as “input terminal”, and “set image input terminal 6” is also referred to as “use input terminal”.

(When the projector starts up)
As shown in FIG. 4, when the projector 100 is turned on by operating the power key 23a (25a) of the input operation means 23 (step S101), the control means 20 acquires information set by the use terminal setting means 201. (Step S102), the process proceeds to Step S103. It is assumed that the use terminal setting means 201 is set in advance as shown in FIG. 2 by a menu operation or the like (not shown).

  In step S103, the control unit 20 instructs the image input selection unit 18 to switch to the first image input terminal 6 (referred to as “input terminal” in the drawing) based on the setting information acquired in step S102, and the process proceeds to step S104. To do. Step S103 and later-described step S202 correspond to an image input selection step.

  In step S104, the control unit 20 instructs the image signal detection unit 15 to acquire the respective image signal detection states of the image input terminals 6 set by the use terminal setting unit 201, and the process proceeds to step S105.

  In step S105, the control unit 20 checks whether image signals have been detected in all of the image input terminals 6 set by the use terminal setting unit 201 based on the image signal detection state acquired in step S104. When image signals are detected at all the set image input terminals 6 (step S105: Y), the process proceeds to step S106. Image signals are not detected at all the set image input terminals 6, that is, image signals are detected at any one of the image input terminals 6 set by the use terminal setting means 201. If not (step S105: N), the process proceeds to step S107.

  In step S106, the control unit 20 projects an image based on the image signal input to the image input terminal 6 (selection input terminal) selected by the image input selection unit 18 by the image projection unit 10, and the process proceeds to step S108. . Step S106, and later-described step S205 and step S304 correspond to control steps.

  In step S107, the control means 20 projects the image signal detection state acquired in step S104 by the image projection means 10 (see FIG. 3A), and transitions to step S108.

  In step S108, the operation flow ends.

(When the projector accepts an input switching operation)
As shown in FIG. 5, when the input switching operation by the input switching key 23b (25b) of the input operation unit 23 is received during the operation of the projector 100 (step S201), the control unit 20 is set by the use terminal setting unit 201. Switch to the next image input terminal 6 based on the received information (step S202), and transition to step S203.

  In step S203, the control unit 20 instructs the image signal detection unit 15 to acquire each image signal detection state of the image input terminal 6 set by the use terminal setting unit 201, and the process proceeds to step S204.

  In step S204, the control means 20 checks whether image signals have been detected in all of the image input terminals 6 set by the use terminal setting means 201 based on the image signal detection state acquired in step S203. When an image signal is detected at all the set image input terminals 6 (step S204: Y), the process proceeds to step S205. Image signals are not detected at all the set image input terminals 6, that is, image signals are detected at any one of the image input terminals 6 set by the use terminal setting means 201. If not (step S204: N), the process proceeds to step S206.

  In step S205, the control unit 20 projects an image based on the image signal input to the image input terminal 6 (selection input terminal) selected by the image input selection unit 18 by the image projection unit 10, and the process proceeds to step S207. .

  In step S206, the control means 20 projects the image signal detection state acquired in step S203 by the image projection means 10 (see FIG. 3A), and transitions to step S207.

  In step S207, the operation flow ends.

(Scheduled task to monitor image signal detection status)
As shown in FIG. 6, when the projector 100 starts executing a scheduled task for monitoring the detection state of the image signal input to the image input terminal 6 set by the use terminal setting unit 201 (step S301), the control unit 20 Instructs the image signal detection means 15 to acquire the image signal detection state of each of the image input terminals 6 set by the use terminal setting means 201 (step S302), and proceeds to step S303.

  In step S303, the control unit 20 checks whether image signals have been detected in all of the image input terminals 6 set by the use terminal setting unit 201 based on the image signal detection state acquired in step S302. When image signals are detected at all the set image input terminals 6 (step S303: Y), the process proceeds to step S304. Image signals are not detected at all the set image input terminals 6, that is, image signals are detected at any one of the image input terminals 6 set by the use terminal setting means 201. If not (step S303: N), the process proceeds to step S305.

  In step S304, the control unit 20 projects an image based on the image signal input to the image input terminal 6 (selection input terminal) selected by the image input selection unit 18 by the image projection unit 10, and the process proceeds to step S307. .

  In step S305, the control unit 20 notifies the notification unit 26 that one of the image input terminals 6 set by the use terminal setting unit 201 is in an image signal non-detected state, and the process proceeds to step S306. .

  In step S306, the control unit 20 determines the state of the image input terminal 6 in the image signal non-detected state among the image input terminals 6 set in the use terminal setting unit 201 based on the image signal detection state acquired in step S302. The image projection means 10 projects the warning message shown and the image (see FIG. 3F) showing the image signal detection state of each of the set image input terminals 6, and the process proceeds to step S307.

  In step S307, the operation flow ends.

  As described above, according to the projector 100 of this embodiment, when the image signal is input to all the image input terminals 6 set by the use terminal setting unit 201, the image projection unit 10 projects an image. Therefore, it is possible to avoid a situation in which the presentation is started in a state where no image signal is input to any of the image input terminals 6 to be used.

  Further, when an image signal is no longer detected at any of the image input terminals 6 set by the use terminal setting unit 201 during image projection, the notification unit 26 notifies the image input terminal 6 so that the image is input to any of the image input terminals 6. It is possible to immediately know the state where the signal is not input by the notification means 26.

  In addition, when an image signal is no longer detected at any of the image input terminals 6 set by the use terminal setting unit 201 while an image is being projected, the image input terminal 6 at which no image signal is input due to a warning image is immediately displayed. It becomes possible to know.

Moreover, you may change the said embodiment as follows.
(Modification 1)
In the above-described embodiment, the image input terminal 6 to which an image signal is input by a predetermined operation in a state in which no image signal is detected and an image is not projected on any of the image input terminals 6 set by the use terminal setting unit 201. The image may be projected and the input may be switched.
As a result, when any of the external devices connected to the plurality of image input terminals 6 is not yet ready, the presentation is performed using only the image input terminals 6 to which the ready external devices are connected. Will be able to start.

(Modification 2)
In the above embodiment, in a state where no image signal is detected and an image is not projected on any of the image input terminals 6 set by the use terminal setting unit 201, only the image input terminal 6 where no image signal is detected is displayed as an image. May be. As a result, the user can immediately know which image input terminal 6 does not receive an image signal.
FIG. 9 shows a screen display example of this modification. FIG. 9 shows a display image when the input from the Video 1A to the image input terminal 64 is no signal when the image input terminal 61 input from the PC 1 is selected.

  DESCRIPTION OF SYMBOLS 100 ... Projector, 6 ... Image input terminal, 10 ... Image projection means, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve, 13 ... Projection lens, 14 ... Liquid crystal drive means, 15 ... Image signal detection means, 16 ... OSD processing means, 17 ... image signal processing means, 18 ... image input selection means, 20 ... control means, 201 ... used terminal setting means, 21 ... storage means, 22 ... light source control means, 23 ... input operation means, 24 ... operation Signal receiving means, 25... Remote controller (remote controller / RC), 26.

Claims (4)

A plurality of image input terminals to which image signals are input;
Image display means for displaying an image based on the input image signal;
Use terminal setting means for setting an image input terminal to be used from among the plurality of image input terminals,
Image signal detecting means for detecting whether an image signal is input for each of the image input terminals set in the use terminal setting means;
Image input selection means for selecting one of the image input terminals set in the use terminal setting means;
One image input terminal selected by the image input selection means when it is detected by the image signal detection means that an image signal is input to all the image input terminals set in the use terminal setting means Control means for displaying an image based on the image signal input to the image display means;
An image display device comprising: The image display device according to claim 1,
In the state where the image is displayed by the image display means, the information display means further includes a notification means for notifying when any of the image input terminals set in the use terminal setting means is in an image signal non-detection state. A characteristic image display device. The image display device according to claim 1 or 2,
The control means is a predetermined warning message when any of the image input terminals set in the use terminal setting means is in an image signal non-detected state while the image display means is displaying an image. Is displayed by the image display means. A plurality of image input terminals to which image signals are input;
Image display means for displaying an image based on the input image signal;
Use terminal setting means for setting an image input terminal to be used from among the plurality of image input terminals,
Image signal detection means for detecting whether an image signal is input for each of the image input terminals set by the use terminal setting means;
A method for controlling an image display device comprising:
An image input selection step of selecting any one of the image input terminals set by the use terminal setting means;
One image input terminal selected by the image input selection step when it is detected by the image signal detection means that an image signal is input to all the image input terminals set in the use terminal setting means A control step of displaying an image based on the image signal input to the image display means;
A method for controlling an image display device, comprising:

Images