JP2008304668A - Image display device and control method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device capable of suppressing an undesired image from being displayed, with an inexpensive configuration and to provide a control method of the image display device. <P>SOLUTION: An input source invalidating key provided in a control panel 22 and a remote control 23 is an operation key for specifying an input terminal to be invalidated. When a user operates the input source invalidating key, a control section 20 judges that the input terminal selected by an input source selection section 26 at this point of time is specified, to invalidate the input terminal. Concretely, when the input source invalidating key is operated, the control section 20 instructs the input source selection section 26 to successively switch to the input terminal and inhibits switching to the specified input terminal, even when an input source switching key is operated, after that. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image display device having a plurality of input terminals and a control method thereof.

An image display device such as a projector includes a large number of input terminals to receive images from various image supply devices such as a personal computer and a video reproduction device (see, for example, Patent Document 1). In a general image display device, in order to switch from an image (input image) input to each input terminal to a desired input image, an input switching key provided on an operation panel or a remote control is displayed on the desired input image. It is necessary to repeat the operation until
Further, the projector device described in Patent Document 1 includes a video display device capable of simultaneously displaying all input images, and an input switching device (touch panel) corresponding thereto, and a plurality of images displayed on the video display device. An image to be projected (projected image output) can be easily selected from the input images.

JP 2003-323168 A

However, in the configuration in which the input image is switched by the input switching key, another input image may be displayed in the middle of switching to the desired input image. For this reason, for example, when a presentation is performed using a projector, an image irrelevant to the presentation may be displayed before switching to a presentation image.
Further, in the projector device described in Patent Document 1, since it is possible to select an image to be projected after confirming a plurality of input images in advance with a video display device, an undesired image is displayed. It is possible to prevent. However, since it is necessary to have a video display function different from the function of projecting an image, there is a problem that the apparatus becomes expensive.

  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 A plurality of input terminals to which image signals are input, an input selection unit that selects one input terminal from the plurality of input terminals, and an input terminal selected by the input selection unit An image display unit that displays an image based on an image signal, an input operation unit that receives an input operation, and a control unit that sequentially switches input terminals to be selected by the input selection unit based on an input operation on the input operation unit And an input terminal invalidating unit that invalidates a designated input terminal among the plurality of input terminals, and the control unit is invalidated by the input terminal invalidating unit among the plurality of input terminals. An image display apparatus that causes the input selection unit to select one input terminal from among input terminals other than the input terminals.

  According to this image display device, the input terminal invalidation unit invalidates the specified input terminal among the plurality of input terminals, and the control unit excludes the input terminals excluding those invalidated by the input terminal invalidation unit Since one input terminal is selected by the input selection unit, an image input to the designated input terminal is not displayed on the image display unit. As a result, it is possible to prevent an unwanted image from being displayed during image switching. Further, since it is not necessary to separately provide a video display device or the like for selecting an image to be displayed on the image display unit, it is possible to prevent the device from becoming expensive.

  Application Example 2 In the image display device, the image display device further includes an image signal detection unit that detects whether or not the image signal is input to the input terminal, and the control unit is configured to detect the image signal by the image signal detection unit. Of the input terminals from which input of an image signal is detected, one input terminal is selected by the input selection unit from input terminals other than those invalidated by the input terminal invalidation unit. Image display device.

  According to this image display device, only the input terminal from which the input of the image signal is detected by the image signal detection unit is selected by the input selection unit, and therefore, the input terminal to which no image signal is input is selected. There will be nothing. As a result, an input operation for switching to a desired input terminal can be performed with less effort.

  Application Example 3 In the above image display device, the control unit causes the image display unit to display a list image indicating whether or not each of the plurality of input terminals is invalid. .

  According to this image display apparatus, since the control unit displays a list image indicating whether each input terminal is invalid or not on the image display unit, it is possible to easily visually recognize which input terminal is invalid. Become.

  Application Example 4 In the image display device, the image display unit modulates the light source and the light emitted from the light source based on the image signal selected by the input selection unit to form an image. An image display device comprising: a light modulation device that performs projection and an optical projection system that magnifies and projects an image formed by the light modulation device.

  According to this image display device, since the light emitted from the light source is modulated and enlarged and projected, it becomes easy to display an image in a large size.

  Application Example 5 A plurality of input terminals to which an image signal is input, an input selection unit that selects one input terminal from the plurality of input terminals, and an input terminal selected by the input selection unit An image display unit that displays an image based on an image signal, an input operation unit that receives an input operation, and a control unit that sequentially switches input terminals to be selected by the input selection unit based on an input operation on the input operation unit A first step of invalidating a designated input terminal among the plurality of input terminals, and the first of the plurality of input terminals. A control method for an image display device, comprising: a second step of causing the input selection unit to select one input terminal from input terminals other than those invalidated in the step.

  According to the control method of the image display device, in the first step, the designated input terminal among the plurality of input terminals is invalidated, and in the second step, the one invalidated in the first step is selected. Since one input terminal is selected by the input selection unit from the input terminals other than the input terminal, an image input to the designated input terminal is not displayed on the image display unit. As a result, it is possible to prevent an unwanted image from being displayed during image switching. Further, since it is not necessary to separately provide a video display device or the like for selecting an image to be displayed on the image display unit, it is possible to prevent the device from becoming expensive.

  In addition, when the above-described image display device and its control method are constructed using a computer (CPU) provided in the image display device, the above-described form and the application example are programs for realizing the functions. Alternatively, the program may be configured in a recording medium or the like in which the program is recorded so as to be readable by the computer. Recording media include flexible disks, CD-ROMs, magneto-optical disks, IC cards, ROM cartridges, punch cards, printed matter on which codes such as barcodes are printed, internal storage devices of image display devices (memory such as RAM and ROM) ), And an external storage device can be used.

Hereinafter, the projector according to the present embodiment will be described with reference to the drawings.
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 1 includes an image projection unit 10 as an image display unit, a control unit 20, a storage unit 21, an operation panel 22, a remote controller 23, an operation signal reception unit 24, an input terminal group 25, and an input source selection. The image projection unit 10 includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, and a projection optical system. Projection lens 13, light valve driving unit 14, and the like.

  The light source 11 includes a discharge-type light source lamp 11a made of a 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. Yes. 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 that 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. The liquid crystal light valves 12R, 12G, and 12B are formed with a plurality of pixels arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel. When the light valve driving unit 14 applies a driving voltage corresponding to the input image data to each pixel, each pixel is set to a light transmittance corresponding to the image data. That is, the light emitted from the light source 11 is modulated by transmitting through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to the image data 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 image light representing a color image, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

  The control unit 20 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of various data, and the like, and operates according to a control program stored in the storage unit 21 to operate the projector 1. Centrally control the operation. That is, the control unit 20 functions as a computer together with the storage unit 21.

  The storage unit 21 includes a non-volatile memory such as a mask ROM (Read Only Memory), a flash memory, or an FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various data, and the like.

  The operation panel 22 and the remote controller 23 correspond to an input operation unit, and include a plurality of operation keys for performing various instructions to the projector 1. The operation keys provided on the operation panel 22 and the remote controller 23 include a “power key” for turning on / off the power, a “menu key” for displaying a menu image for performing various settings, selection of items in the menu image, and the like. "Cursor key" used to select, "decision key" to confirm the selected item, "cancel key" used to cancel the operation, "input source switching key" for switching the input source (image signal supply source) ”, An“ input source invalidation key ”for designating an input source to be invalidated. When the user operates various operation keys on the operation panel 22, the operation panel 22 outputs an operation signal corresponding to the operation content of the user to the control unit 20. When the user operates various operation keys of the remote controller 23, the remote controller 23 emits an infrared operation signal corresponding to the user's operation content, and the operation signal receiving unit 24 receives this and transmits it to the control unit 20.

  The input terminal group 25 includes a plurality of input terminals capable of inputting various types of image signals from an external image supply device (not shown) such as an information device such as a PC (personal computer) or a video device such as a video playback device. ing. In the present embodiment, two PC-system input terminals 25a and 25b that can input image signals from information devices and the like, and two video-system input terminals 25c and 25d that can input image signals from video devices and the like are provided. A total of four input terminals are provided. The image signals input to the input terminals 25 a to 25 d are supplied to the input source selection unit 26. In the menu image and the like, the PC input terminals 25a and 25b are expressed as “PC1” and “PC2”, respectively, and the video input terminals 25c and 25d are expressed as “Video1” and “Video2”, respectively. (See FIG. 6).

  The input source selection unit 26 corresponds to the input selection unit, and selects one input terminal based on an instruction from the control unit 20 among the four input terminals 25a to 25d, and an image input to this input terminal. The signal is output to the image signal processing unit 27.

  The image signal processing unit 27 uses various types of image signals input from the input source selection unit 26 as image data representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B, that is, a drive voltage applied to each pixel. Is converted into image data for prescribing. Further, on the basis of an instruction from the control unit 20, the converted image data is adjusted for brightness, contrast, sharpness, hue, and various image quality adjustments such as gamma correction. The image data whose image quality has been adjusted by the image signal processing unit 27 is output to the OSD processing unit 28.

  The OSD processing unit 28 displays an OSD (on-screen display) image such as a menu image or a message image on an image (input image) based on image data input from the image signal processing unit 27 based on an instruction from the control unit 20. The process for superimposing on is performed. The OSD processing unit 28 includes an OSD memory (not shown), and stores OSD image data representing graphics, fonts, and the like for forming an OSD image. When the control unit 20 instructs to superimpose an OSD image, the OSD processing unit 28 reads out necessary OSD image data from the OSD memory, and an image signal processing unit so that the OSD image is superimposed at a predetermined position of the input image. The OSD image data is combined with the image data input from the terminal 27. The image data combined with the OSD image data is output to the light valve driving unit 14. When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 28 outputs the image data output from the image signal processing unit 27 to the light valve driving unit 14 as it is.

  When the light valve driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the input image data, the liquid crystal light valves 12R, 12G, and 12B form images according to the image data, and these images are projected to the projection lens. 13 is projected onto the screen SC.

Next, the operation of the projector 1 according to the present embodiment will be described with reference to the drawings.
The input source switching key provided on the operation panel 22 and the remote controller 23 is an operation key for switching the input source (image signal supply source). When the user operates the input source switching key, the control unit 20 displays the input source. The input terminals to be selected by the selection unit 26 are sequentially switched. Specifically, every time the input source switching key is operated, the control unit 20, for example, →→ input terminal 25a (PC1) → input terminal 25b (PC2) → input terminal 25c (Video1) → input terminal 25d ( One input terminal is selected by the input source selection unit 26 in the order of Video2) → input terminal 25a (PC1) →..., And the images projected from the image projection unit 10 (projection image G) are sequentially switched (see FIG. 2).

  The input source invalidation key provided in the operation panel 22 and the remote controller 23 is an operation key for designating an input terminal to be invalidated. When the user operates the input source invalidation key, the control unit 20 At that time, it is determined that the input terminal selected by the input source selection unit 26 is designated, and the input terminal is invalidated. Specifically, when the input source invalidation key is operated, the control unit 20 instructs the input source selection unit 26 to switch to the input terminal in the next order (next order), and thereafter. Even when the input source switching key is operated, switching to the designated input terminal is prohibited.

  For example, when all the input terminals 25a to 25d are not invalid (valid), if the input source invalidation key is operated while the input terminal 25c (Video1) is selected, the control unit 20 The source selection unit 26 selects the next input terminal 25d (Video 2). Thus, an image based on the image signal input to the input terminal 25d is projected from the image projection unit 10. Further, when the input source switching key is operated while the input terminal 25b (PC2) is selected, the control unit 20 skips switching to the input terminal 25c (Video1) and performs input. Switch to terminal 25d (Video 2). That is, after invalidating the input terminal 25c (Video 1), the control unit 20 causes the input terminal 25d (Video 2) → input terminal 25a (PC1) → input terminal 25b (every time the input source switching key is operated. PC2) → input terminal 25d (Video2) →... Causes the input source selection unit 26 to select one input terminal in this order (see FIG. 3).

  The storage unit 21 stores input source information indicating whether each of the input terminals 25a to 25d is valid or invalid, and the control unit 20 invalidates the input terminal in accordance with the operation of the input source invalidation key. In this case, the input source information is updated and stored in the storage unit 21.

FIG. 4 is a flowchart for explaining the details of the operation when the input source invalidation key is operated. When the input source invalidation key is operated, the control unit 20 operates according to the flow shown in FIG.
As shown in FIG. 4, in step S101, the control unit 20 reads input source information from the storage unit 21, and in step S102, whether or not there are a plurality of valid input terminals based on the read input source information. Judging. If there is only one valid input terminal, the process proceeds to step S103, and if there are a plurality of valid input terminals, the process proceeds to step S104.

  If there is only one valid input terminal and the process proceeds to step S103, the control unit 20 instructs the OSD processing unit 28 to give an error message indicating that the number of invalid input terminals cannot be increased (for example, , “No more input terminals can be disabled.” Is superimposed on the input image for a predetermined time, and the process is terminated. By going through these two steps S102 and S103, all the input terminals 25a to 25d are not invalidated, and at least one input terminal can be made valid.

  On the other hand, when there are a plurality of valid input terminals and the process proceeds to step S104, the input terminal currently selected (for example, the input terminal 25c) is invalidated for the input source information read in step S101. The updated input source information is stored in the storage unit 21.

  In subsequent step S105, the control unit 20 instructs the input source selection unit 26 to select the next input terminal (for example, the input terminal 25d) from the valid input terminals, and ends the process. As a result, an image based on the image signal input to the newly selected input terminal (input terminal 25d) is projected from the image projection unit 10.

FIG. 5 is a flowchart for explaining the details of the operation when the input source switching key is operated.
As shown in FIG. 5, when the input source switching key is operated, the control unit 20 reads the input source information from the storage unit 21 and recognizes which input terminal is valid (step S201). Thereafter, the control unit 20 instructs the input source selection unit 26 to select the next input terminal from the valid input terminals (step S202), and ends the process. This prevents the input source selection unit 26 from selecting an invalid input terminal, thereby preventing an image input to an invalid input terminal from being displayed while switching the input source. Is possible.

  In the projector 1 according to the present embodiment, the user operates the menu keys provided on the operation panel 22 and the remote controller 23 to display a setting menu (not shown) in a superimposed manner, thereby performing a predetermined operation. A list (input terminal list image) indicating whether it is valid or invalid can be displayed in a superimposed manner.

FIG. 6 is an explanatory diagram showing an input terminal list image displayed superimposed on a projected image.
As shown in FIG. 6, the input terminal list image Lt includes four items “PC1”, “PC2”, “Video1”, “Video” corresponding to the input terminals 25a to 25d, respectively, under the title “input terminal list”. "Video 2" is included, and a symbol "O" or "X" is also written on the right side of each item. When displaying the input terminal list image Lt, the control unit 20 reads the input source information from the storage unit 21, and places “O” next to the valid input terminal (item) and “O” next to the invalid input terminal. “×” is added, and the user can recognize whether or not each input terminal is valid by viewing the input terminal list image Lt.

  Also, one of the four items is in a selected state (a state in which the background color is different), and the user operates the cursor keys provided on the operation panel 22 and the remote controller 23 to select any item. Items can be selected. When the user operates the enter key after selecting a desired item, the control unit 20 superimposes and displays an OSD image (valid / invalid switching image St) as shown in FIG. The valid / invalid switching image St includes two items of “◯ Valid” and “× Invalid” under the selected item name (for example, “Video1”). The user can validate or invalidate the selected input terminal by operating the cursor key and selecting any item and then operating the enter key. When the input terminal is switched between valid and invalid by this operation, the control unit 20 ends the superimposed display of the valid / invalid switching image St, displays the input terminal list image Lt reflecting the switching, and inputs The source information is updated and stored in the storage unit 21. As described above, the user can return the invalid input terminal to valid by displaying the input terminal list image Lt. Further, when invalidating the input terminal, in addition to the method of operating the input source invalidation key described above, it is also possible to invalidate from the state where the input terminal list image Lt is displayed.

As described above, according to the projector 1 of the present embodiment, the following effects can be obtained.
(1) According to the projector 1 of the present embodiment, the control unit 20 invalidates the input terminal designated by the user with the input source invalidation key or the like, and thereafter prohibits switching to the input terminal. An image input to the designated input terminal is not projected from the image projection unit 10. As a result, it is possible to prevent an undesired image from being displayed during image switching using the input source switching key.

  (2) According to the projector 1 of the present embodiment, by disabling some of the input terminals, the number of choices (selection targets) when selecting an input terminal with the input source switching key is reduced. The input operation required for switching to the input terminal can be performed with a small number of steps.

  (3) According to the projector 1 of the present embodiment, since it is not necessary to separately provide a video display device or the like for selecting an image to be displayed, it is possible to prevent the device from becoming expensive.

  (4) According to the projector 1 of the present embodiment, the control unit 20 causes the image projection unit 10 to project the input terminal list image Lt indicating whether the input terminals 25a to 25d are valid or invalid. It is possible to easily visually check whether the designation is invalid.

  In the present embodiment, in order to invalidate the designated input terminal in response to the operation of the input source invalidation key or the like, the control unit 20 when executing the above steps S104 and S105 performs the input terminal invalidation. It corresponds to the part.

(Modification)
The embodiment may be modified as follows.
The embodiment further includes an image signal detection unit that detects whether or not an image signal is input, and when an input source switching key is operated, an input terminal to which no image signal is input is skipped. May be.
FIG. 8 is a block diagram showing a schematic configuration of a projector according to this modification.
As shown in FIG. 8, an image signal detection unit 29 is provided on the output side of the input source selection unit 26, and whether or not an image signal is input to the input terminal selected by the input source selection unit 26. Can be detected. When the input source switching key is operated by the user, the control unit 20 causes the input source selection unit 26 to select the next effective input terminal and is selected based on the detection result of the image signal detection unit 29. It is determined whether an image signal is input to the input terminal. As a result, if no image signal is input to this input terminal, the next effective input terminal is selected, and the above operation is repeated until an input terminal to which the image signal is input is selected. . As a result, switching to an input terminal to which no image signal is input is prevented, so that the user can perform an input operation required for switching to a desired input terminal with fewer steps.

  In the above-described embodiment, the transmissive liquid crystal light valves 12R, 12G, and 12B are used as the light modulator. However, it is also possible to use a reflective light modulator such as a reflective liquid crystal light valve. In addition, it is possible to use a micromirror array device that modulates light emitted from a light source by controlling the emission direction of incident light for each micromirror as a pixel.

  In the embodiment, the light source 11 is constituted by the discharge-type light source lamp 11a. However, a solid light source such as an LED (Light Emitting Diode) light source or other light sources may be used.

  In the embodiment, the projector 1 that modulates and projects the light emitted from the light source 11 is described as an example of the image display device, but a rear projector that is integrally provided with a transmissive screen, or It can also be applied to liquid crystal displays, plasma displays, SED (Surface-conduction Electron-emitter Display), organic EL (Electro Luminescence) displays, and the like. When a projector is used for the image display device, it becomes easier to display an image with a larger size than other image display devices.

1 is a block diagram showing a schematic configuration of a projector according to an embodiment. Explanatory drawing for demonstrating operation | movement of a projector. Explanatory drawing for demonstrating operation | movement of a projector. The flowchart for demonstrating the detail of operation | movement when an input source invalidation key is operated. The flowchart for demonstrating the detail of operation | movement when an input source switching key is operated. Explanatory drawing which shows an input terminal list image. Explanatory drawing which shows a valid / invalid switching image. The block diagram which shows schematic structure of the projector which concerns on a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 10 ... Image projection part, 11 ... Light source, 11a ... Light source lamp, 11b ... Reflector, 12R, 12G, 12B ... Liquid crystal light valve, 13 ... Projection lens, 14 ... Light valve drive part, 20 ... Control part, DESCRIPTION OF SYMBOLS 21 ... Memory | storage part, 22 ... Operation panel, 23 ... Remote control, 24 ... Operation signal receiving part, 25 ... Input terminal group, 25a-25d ... Input terminal, 26 ... Input source selection part, 27 ... Image signal processing part, 28 ... OSD processing unit, 29... Image signal detection unit, Lt... Input terminal list image, St... Valid / invalid switching image, SC.

Claims (5)

A plurality of input terminals for inputting image signals;
An input selection unit for selecting one input terminal from the plurality of input terminals;
An image display unit that displays an image based on an image signal input to the input terminal selected by the input selection unit;
An input operation unit that accepts input operations;
A control unit that sequentially switches input terminals to be selected by the input selection unit based on an input operation on the input operation unit;
Among the plurality of input terminals, an input terminal invalidating unit for invalidating a designated input terminal,
With
The control unit causes the input selection unit to select one input terminal from among the plurality of input terminals excluding those invalidated by the input terminal invalidation unit. Image display device. The image display device according to claim 1,
An image signal detector that detects whether the image signal is input to the input terminal;
The control unit selects one input terminal from among the input terminals from which the input of the image signal is detected by the image signal detection unit, except for those invalidated by the input terminal invalidation unit. An image display device that causes the input selection unit to select. The image display device according to claim 1 or 2,
The control unit causes the image display unit to display a list image indicating whether or not each of the plurality of input terminals is invalid. The image display device according to claim 1,
The image display unit
A light source;
A light modulation device that modulates light emitted from the light source based on an image signal selected by the input selection unit to form an image;
A projection optical system for enlarging and projecting an image formed by the light modulation device;
An image display device comprising: Based on a plurality of input terminals to which an image signal is input, an input selection unit that selects one input terminal from the plurality of input terminals, and an image signal that is input to the input terminal selected by the input selection unit An image display unit that displays an image, an input operation unit that receives an input operation, and a control unit that sequentially switches input terminals to be selected by the input selection unit based on an input operation on the input operation unit. A control method for an image display device, comprising:
A first step of disabling a designated input terminal among the plurality of input terminals;
A second step of causing the input selection unit to select one input terminal from among the plurality of input terminals excluding those invalidated in the first step;
An image display apparatus control method comprising:

Images