JP2013029642A - Image display device and control method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device that informs a user of an image input terminal to which an image signal is input even when an image input terminal to which the image signal is not input is selected in the image display device provided with a plurality of image input terminals.SOLUTION: When an image signal is not detected at a currently selected image input terminal and the image signal is detected to be input to any other image input terminal, an image display device causes image projecting means to project a notification message that informs a user of an image input terminal to which the image signal is input and a switching method for switching to other image input terminal.

Description

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

  Conventionally, when displaying image data using an image display device having a plurality of image input terminals, the image data is not displayed correctly because an external device is connected to an image input terminal different from the selected image input terminal. In some cases, users who are not used to the operation are confused. Further, there are cases where a user who is not familiar with the operation repeats the key operation or leaves it without knowing the switching method of the image input terminal. Therefore, a projector that displays signal input states of a plurality of image input terminals on a touch panel provided in the main body is disclosed (Patent Document 1).

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 device according to this application example includes an image including a plurality of image input terminals to which image signals are input, and image display means for displaying an image based on the input image signals. An image input selection means for selecting any one of the plurality of image input terminals and whether or not an image signal is input to any of the plurality of image input terminals. An image display device comprising an image signal detection means and a control means for controlling the image display device, wherein the control means does not detect an image signal at a currently selected image input terminal and the image input At least one of the image input terminal to which the image signal is input and the switching method to the other image input terminal when detecting that the image signal is input to any of the other image input terminals different from the terminal one And displaying on the image display unit a notification message informing.

  According to this application example, even when a user unfamiliar with the operation of the image display device connects an external device to an image input terminal different from the selected one, the image input terminal to which an image signal is input It becomes possible to know at least one of the switching methods to other image input terminals by a notification message.

  Application Example 2 In the image display device according to the application example described above, an input operation unit that receives an input operation, a storage unit that stores an operation number counter that counts the number of input operations received by the input operation unit, And the control means detects that an image signal is not detected in the currently selected image input terminal and an image signal is input to any of the other image input terminals, and When the operation counter counter counts an input operation exceeding a predetermined number of times, a notification message that informs at least one of the image input terminal to which the image signal is input and the switching method to another image input terminal is displayed. It displays on a display means.

  According to this application example, when the image signal is not detected at the selected image input terminal and the image signal is input to any of the other image input terminals, the input operation unit inputs more than a predetermined number of times. When an operation is accepted, an image input terminal to which an image signal is input and a switching method are displayed as a notification message. In other words, when a user who is not familiar with the operation does not know how to switch the image input terminal and operates the key several times, the image input terminal to which the image signal is input and a method for switching to another image input terminal It is possible to know at least one of these by a notification message.

  Application Example 3 In the image display device according to the application example described above, the control unit is configured so that the state in which no image signal is detected at the currently selected image input terminal continues for a predetermined time, and then the other image input terminal When it is detected that an image signal is input to any one of the image display means, a notification message that informs at least one of an image input terminal to which the image signal is input and a switching method to another image input terminal It is characterized by displaying.

  According to this application example, when a user unfamiliar with the operation of the image display device connects an external device to a different image input terminal from the selected one and has been left for a while without knowing the switching method. In addition, at least one of an image input terminal to which an image signal is input and a method for switching to another image input terminal is notified by a notification message, and an operation method can be notified.

  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; and image display means for displaying an image based on the input image signals. A control method for an image display apparatus, comprising: an image input selection step of selecting any one of the plurality of image input terminals; and an image signal being input to any of the plurality of image input terminals. A signal detection step for detecting whether or not an image signal is not detected at the currently selected image input terminal by the signal detection step, and an image is displayed on one of the other image input terminals different from the image input terminal. When it is detected that a signal is input, a notification message indicating at least one of the image input terminal to which the image signal is input and the switching method to another image input terminal is sent in advance. A notification step of displaying on the image display means, that it has a characterized.

  According to this application example, even when a user unfamiliar with the operation of the image display device connects an external device to an image input terminal different from the selected one, the terminal to which the image signal is input and the other It is possible to know at least one of the switching methods to the image input terminal by a notification message.

The block diagram which shows the circuit structure of a projector. The flowchart which shows operation | movement of a projector. It is a figure which shows the display message of a projector, (a) is an example of a notification message when there is one image input terminal to which an image signal is input other than the currently selected image input terminal, and (b) is being selected. An example of a notification message when there are a plurality of image input terminals to which image signals are input other than the image input terminal, (c) includes one image input terminal to which an image signal is input, including the currently selected image input terminal. An example of a warning message when there is no connection is shown.

  Hereinafter, a projector as an image display apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. The following embodiments do not limit the invention according to the scope of claims, and all combinations of features in the embodiments are not necessarily essential to the solution means of the invention.

(First embodiment)
FIG. 1 is a block diagram illustrating a circuit configuration of the projector according to the present embodiment.
As shown in FIG. 1, the projector 1 includes an image signal processing unit 3, an OSD processing unit 4, an image input selection unit 5, an image input terminal 6, an image signal detection unit 7, an image projection unit 10, a control unit 20, and a storage unit. 21, a light source control unit 22, an input operation unit 23, and the like, which are housed in a housing (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 projecting means 10 modulates the light emitted from the light source 11 by 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. The liquid crystal light valves 12R, 12G, and 12B are formed with a plurality of pixels (not shown) arranged in a matrix, 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. For this reason, 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 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 1 that projects using the light source lamp 11a as the light source 11 is illustrated, but the present invention is also applicable to a projector that projects using an LED (Light Emitting Diode) light source or a laser light source as the light source. Can do.
In the present embodiment, the image projection unit 10 exemplifies a transmissive liquid crystal type projection optical system using the light source 11 and the 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 display system and a micromirror device system (light switch display system).

  The control means 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 (not shown) stored in the storage means 21. As a result, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21. The control means 20 includes a timer 20a that measures time.

The storage means 21 is composed of 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 1, various setting data for defining operation conditions of the projector 1, and the like.
The storage means 21 stores a key input counter 21a as an operation number counter that counts the number of input operations accepted by the input operation means 23 in a state where the image signal of the image input terminal 6 is not detected.

  Although not shown in the figure, the input operation means 23 includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the input operation means 23 include a power key for alternately switching on / off the power supply, and input switching for switching to any one of the plurality of image input terminals 6 by the image input selection means 5. There are a key, a menu key for superimposing a setting menu for performing various settings, a cursor key for selecting a setting item from the setting menu, a determination key, an escape key, and the like.

  When the user operates various operation keys of the input operation unit 23, the input operation unit 23 outputs an operation signal corresponding to the operation content of the user to the control unit 20. The input operation means 23 may have a configuration including a remote controller (remote control) signal receiving means (not shown) and a remote controller (not shown) capable of remote operation. In this case, the remote controller emits an operation signal such as infrared rays according to the operation content of the user (user), and the remote control signal receiving means receives this and transmits it to the control means 20 as control information.

  As described above, the image input terminal 6 includes a plurality of image input terminals 6a, 6b, and 6c. Each of the plurality of image input terminals 6a, 6b, and 6c includes an external image such as a video playback device or a personal computer. Image information is input from the output device via a cable (not shown). The image information input to the image input terminal 6 is supplied to the image input selection means 5.

The image input selecting means 5 outputs image information inputted to one image input terminal 6 selected based on an instruction from the control means 20 among the plurality of image input terminals 6 (6a, 6b, 6c) as image signal processing means. 3 is output.
When the user operates an input switching key provided in the input operation unit 23 to designate, for example, the image input terminal 6a, the control unit 20 outputs image information input to the image input terminal 6a to the image signal processing unit 3. The image input selection means 5 is instructed to do so.

  The image signal detection unit 7 notifies the control unit 20 of the detection result as to whether or not a valid image signal is input to the image input terminal 6 selected by the image input selection unit 5.

The image signal processing unit 3 converts the image information input from the image input selection unit 5 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B. Here, the converted image information is for each color light of R, G, and B, 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 4 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 means 4 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 4 reads out 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 3.
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 4 outputs the image information input from the image signal processing unit 3 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 in accordance with the image information input from the OSD processing unit 4, the liquid crystal light valves 12R, 12G, and 12B form images according 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.

  Next, the operation of the projector 1 of the present embodiment will be described using the flowchart of FIG.

As shown in FIG. 2, when the projector 1 is turned on by the power key operation of the input operation unit 23 (step S <b> 101), the control unit 20 selects the currently selected image input based on the detection result of the image signal detection unit 7. It is checked whether an image signal is input to the terminal 6 (step S102 (signal detection step)). The currently selected image input terminal 6 is an image input terminal selected by the user from among a plurality of image input terminals in an image input selection step (not shown).
When an image signal is input to the currently selected image input terminal 6 (step S102: Y), the process proceeds to step S106. When no image signal is input to the currently selected image input terminal 6 (step S102: N), the process proceeds to step S103.

  In step S <b> 103, the control unit 20 switches each of the plurality of image input terminals 6 to the image input terminal 6 different from the currently selected image input terminal 6 by the image input selection unit 5, while the image signal detection unit 7 switches each image. The image signal detection state of the input terminal 6 is acquired, and the process proceeds to step S104.

  In step S104, the control means 20 checks whether there is an image input terminal 6 from which an image signal is detected in addition to the currently selected image input terminal 6, according to the image signal detection state acquired in step S103. If there is an image input terminal 6 from which an image signal is detected (step S104: Y), the process proceeds to step S105. If there is no image input terminal 6 from which an image signal is detected (step S104: N), the process proceeds to step S107.

  In step S105, the control means 20 resets the key input counter 21a, starts timing by the timer 20a, and then proceeds to step S110.

  In step S106, the control means 20 starts projecting the image data of the currently selected image input terminal 6 by the image projection means 10, and ends this flow.

  In step S107, the control unit 20 projects the warning message M3 by the image projection unit 10, and the process proceeds to step S108. An example of the warning message M3 at this time is shown in FIG.

  In step S108, the operation flow ends.

  In step S110, the control means 20 checks whether an image signal is detected at the currently selected image input terminal 6. When an image signal is detected (step S110: Y), the process proceeds to step S116. When the image signal is not detected (step S110: N), the process proceeds to step S111.

  In step S111, the control unit 20 checks whether or not the input operation unit 23 has accepted the input operation. When an input operation is accepted (step S111: Y), the process proceeds to step S113. When the input operation is not accepted (step S111: N), the process proceeds to step S112.

  In step S112, the control means 20 checks whether or not the time measured by the timer 20a has passed a predetermined time T1 (for example, 10 seconds). When the timer 20a has passed the predetermined time T1 (step S112: Y), the process proceeds to step S120. When the timer 20a has not passed the predetermined time T1 (step S112: N), the process proceeds to step S110.

  In step S113, the control means 20 increases the key input counter 21a by 1, and proceeds to step S114.

  In step S114, the control means 20 checks whether or not the key input counter 21a has exceeded a predetermined number of times N1 (for example, 10 times). When the key input counter 21a exceeds the predetermined number N1 (step S114: Y), the process proceeds to step S120. If the key input counter 21a does not exceed the predetermined number N1 (step S114: N), the process proceeds to step S115.

  In step S115, the control unit 20 executes a process based on the key operation accepted by the input operation unit 23 in step S111, and the process proceeds to step S110.

  In step S116, the control means 20 stops the timer 20a and transitions to step S117.

  In step S117, the control means 20 starts projecting the image data of the currently selected image input terminal 6 by the image projection means 10, and ends this flow.

  In step S120 (notification step), the control unit 20 projects the notification message M1 or the notification message M2 by the image projection unit 10. If there is one image input terminal 6 from which the image signal is detected from the signal detection state of the other image input terminal 6 acquired in step 103, the notification message M1 is projected by the image projection means 10, and the image signal is detected. When there are a plurality of image input terminals 6, the image projection means 10 projects a message indicating the name of the image input terminal and a method for switching to another image input terminal as in the notification message M 2. An example of the notification message M1 at this time is shown in FIG. 3A, and an example of the notification message M2 is shown in FIG.

  In step S121, the control unit 20 receives a key operation for the notification message M1 or the notification message M2 projected in step S120 by the input operation unit 23, and switches the image input terminal 6 by the image input selection unit 5 based on the received key operation. . Next, the process proceeds to step S122.

  In step S122, the control means 20 stops timing by the timer 20a, and transitions to step S123.

  In step S123, the control means 20 projects the image data of the currently selected image input terminal 6 by the image projection means 10, and ends this flow.

As described above, according to the projector 1 of the present embodiment, even when an external device is connected to an image input terminal 6 different from the currently selected one, the image input terminal 6 to which an image signal is input, It becomes possible to know how to switch to another image input terminal 6 by a notification message.
In addition, even if a user who is not familiar with the operation does not know how to switch the image input terminal 6 and is left as it is for a predetermined time, or when a key operation is repeated several times, even a user who is not familiar with the operation may It is possible to know at least one of the image input terminal 6 to which a signal is input and the switching method to another image input terminal 6 by a notification message.

(Modification 1)
Moreover, you may change the said embodiment as follows.
In the above embodiment, when it is detected that an image signal is not input to the image input terminal 6 selected by the image input selection unit 5 and an image signal is input to another image input terminal 6, In addition to the switching method between the image input terminal 6 and another image input terminal 6, a reduced image (thumbnail) of the image signal may be displayed.
As a result, when image signals are input to a plurality of image input terminals 6, it is possible to confirm which image input terminal 6 should be selected by a reduced image.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 3 ... Image signal processing means, 4 ... OSD processing means, 5 ... Image input selection means, 6 ... Image input terminal, 7 ... Image signal detection means, 10 ... Image projection means, 11 ... Light source, 12R, 12G , 12B ... liquid crystal light valve, 13 ... projection lens, 14 ... liquid crystal drive means, 20 ... control means, 21 ... storage means, 21a ... key input counter, 22 ... light source control means, 23 ... input operation means.

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;
An image display device comprising:
Image input selection means for selecting any one of the plurality of image input terminals;
Image signal detection means for detecting whether or not the image signal is input to any of the plurality of image input terminals;
Control means for controlling the image display device;
An image display device comprising:
When the control means detects that no image signal is detected at the currently selected image input terminal and an image signal is input to any of the other image input terminals different from the image input terminal, An image display device that displays on the image display means a notification message that informs at least one of an image input terminal to which the image signal is input and a switching method to another image input terminal. The image display device according to claim 1,
An input operation means for receiving an input operation;
A storage means for storing an operation number counter for counting the number of input operations accepted by the input operation means;
The control means detects that no image signal is detected at the currently selected image input terminal and an image signal is input to any of the other image input terminals, and then the operation number counter When the number of input operations exceeding a predetermined number is counted, a notification message informing at least one of the image input terminal to which the image signal is input and the switching method to another image input terminal is displayed on the image display means. An image display device. The image display device according to claim 1,
When the control means detects that an image signal is input to any of the other image input terminals after a state in which no image signal is detected at the currently selected image input terminal continues for a predetermined time, An image display device that displays on the image display means a notification message that informs at least one of an image input terminal to which the image signal is input and a switching method to another image input terminal. 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;
A method for controlling an image display device comprising:
An image input selection step of selecting any one of the plurality of image input terminals;
A signal detection step of detecting whether an image signal is input to any of the plurality of image input terminals;
The signal detection step detects that no image signal is detected at the currently selected image input terminal, and that an image signal is input to one of the other image input terminals different from the image input terminal. A notification step of causing the image display means to display a notification message indicating at least one of an image input terminal to which the image signal is input and a switching method to another image input terminal;
A method for controlling an image display device, comprising:

Images