JP2010186036A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device that prevents an unintended remote-control operation. <P>SOLUTION: Two remote controllers 41, 42 transmit remote-control signals different in format, while a remote-control signal receiving part 28 can receive both formats. However, the remote-control signal receiving part 28 cannot enable both formats simultaneously but enables only one of the formats. In order to receive a remote-control signal of the other format, it is necessary to change the setting to enable the format. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display apparatus that is remotely operated by a remote controller.

  When a plurality of image display devices are used in a predetermined space, if a remote control for remotely operating the plurality of image display devices is common, a plurality of image display devices can be operated simultaneously with one remote control. It becomes possible. However, in the configuration as described above, even when it is desired to remotely control each image display device individually, a plurality of image display devices operate in response to the remote control. For this reason, Patent Document 1 is provided with a switch circuit for switching between enabling and disabling the remote control operation, and an image display device (projection-type image display) capable of remote control operation only when this switch circuit is set to ON. Device) has been proposed. According to this image display device, since the switch circuit is set to OFF, there is no response to the remote control, so that a situation in which a plurality of image display devices are operated unintentionally can be suppressed.

JP 2000-330201 A

  However, in the image display device described in Patent Document 1, in order to perform a remote control operation on the image display device in which the switch circuit is set to OFF, the switch circuit must be set to ON again. Under circumstances where frequent switching is necessary, there is a problem that the operation becomes complicated. Similarly, Patent Document 1 proposes a configuration that enables individual operations by transmitting a signal received from a remote controller by one image display device to another image display device via a cable. . However, in such a configuration, the work of connecting the cables is necessary, so the preparation in advance becomes complicated, and the arrangement of the image display devices is restricted by the cable connection, and the aesthetic appearance of the room is impaired. I will.

  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 is an image display device that is remotely operated by a remote control signal transmitted from a remote controller, and can receive a remote control signal in a plurality of formats. A format setting unit that sets an effective format from the plurality of formats, and a format of the remote control signal received by the remote control signal receiving unit is a format that is set to be valid by the format setting unit. A control unit that performs control based on the remote control signal; and a display unit that displays an image based on the control of the control unit.

  According to this image display device, when the remote control signal receiving unit receives a remote control signal having a format that is set effectively by the format setting unit, the control unit is configured to perform control based on the remote control signal. By appropriately setting the format, it is possible to switch available remote controllers. For this reason, if a plurality of image display devices arranged close to each other are set to valid formats, they will not be remotely operated by the same remote controller, and the plurality of image display devices can be operated individually. It becomes possible to do. Even if other image display devices are not arranged close to each other, remote operation is not possible except for a remote controller having an effective format, so that unintended remote operation can be suppressed.

  Application Example 2 In the image display device according to the application example described above, it is preferable that the format setting unit displays a list of the plurality of formats on the display unit and selects a format to be effectively set from the list. .

  According to this image display device, since the format to be validated is selected from a list of a plurality of formats, the format can be easily set.

  Application Example 3 In the image display device according to the application example, the format setting unit displays a confirmation message on the display unit after a format to be set valid is selected, and confirmation by the confirmation message is performed. Once done, it is desirable to set the selected format to valid.

  According to this image display device, since a confirmation message is displayed after a format to be validated is selected, and the confirmation by the confirmation message is performed, the selected format is validated. It is possible to prevent the setting change (switching) of the format from being inadvertently performed.

  Application Example 4 The image display apparatus according to the application example may further include a remote controller that transmits a remote control signal of any one of the plurality of formats.

  Application Example 5 The image display device according to the application example may further include a plurality of remote controllers that respectively transmit the plurality of formats of remote control signals.

  Application Example 6 In the image display device according to the application example described above, the plurality of remote controls include a first remote control and a second remote control whose operation content is more limited than that of the first remote control. You may do it.

1 is a block diagram showing a schematic configuration of a projector. Explanatory drawing for demonstrating a remote control signal. 7 is a flowchart for explaining the operation of the projector when switching between valid formats. The figure which shows a format selection menu. The figure which shows a confirmation message. The figure which shows the remote control which concerns on a modification.

  Hereinafter, a projector as an image display apparatus will be described.

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 a projector body 2 and two remote controllers 41 and 42 (hereinafter referred to as “first remote controller 41” and “second remote controller 42”) for remotely operating the projector body 2. The projector body 2 includes an image projection unit 10, a control unit 20, a storage unit 21, an image information input unit 22, an image processing unit 23, an OSD processing unit 24, a power supply circuit 25, A light source control unit 26, an operation panel 27, a remote control signal receiving unit 28, and the like are provided.

  The image projection unit 10 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 light valve drive unit 14, and the like. The image projection unit 10 corresponds to a display unit, modulates the light emitted from the light source 11 with the liquid crystal light valves 12R, 12G, and 12B, forms an image, and projects the image from the projection lens 13. Displayed on an external screen S or the like.

  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 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 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 an image corresponding to the image information is formed for each color light. The formed color images are synthesized for each pixel by a color synthesis optical system (not shown) to form a color image, and then enlarged and projected 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 main body 2. Control over all operations. 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 main body 2, various setting data for defining operation conditions of the projector main body 2, and the like.

  The image information input unit 22 includes an input terminal (not shown) connected to an external image output device C such as a video playback device or a personal computer, and various types of image information are input from the image output device C. The The image information input to the image information input unit 22 is supplied to the image processing unit 23.

  The image processing unit 23 converts various types of image information input from the image information input unit 22 into image information 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. Convert to image information for prescription. Further, the image processing unit 23 performs image quality adjustment processing for adjusting brightness, contrast, sharpness, hue, and the like on the converted image information based on an instruction from the control unit 20, and the processed image information Is output to the OSD processing unit 24.

  The OSD processing unit 24 superimposes and displays an OSD (on-screen display) image such as a menu image or a message image on the image projected from the image projection unit 10 (projection image) based on an instruction from the control unit 20. Perform the process. The OSD processing unit 24 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 OSD image superimposition display, the OSD processing unit 24 reads necessary OSD image information from the OSD memory, and performs image processing so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image information is combined with the image information input from the unit 23. The image information combined with the OSD image information 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 24 outputs the image information input from the image processing unit 23 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 information, the liquid crystal light valves 12R, 12G, and 12B form images corresponding to the image information, and these images are projected into the projection lens. 13 is projected.

  The power supply circuit 25 is supplied with commercial power such as AC 100V from the outside. The power supply circuit 25 converts a commercial power supply (AC power supply) into a DC power supply having a predetermined voltage and supplies power to each unit of the projector main body 2. Further, the power supply circuit 25 supplies power (operating power) necessary for image projection to each unit based on an instruction from the control unit 20 (also referred to as “power-on state”) and operating power. It is possible to switch between a state in which supply is stopped (also referred to as a “power-off state” or a “standby state”).

  The light source control unit 26 controls supply and stop of power to the light source 11 based on an instruction from the control unit 20 and switches between turning on and off the light source 11.

  The operation panel 27 corresponds to an input operation unit that receives an input operation from a user, and includes a plurality of operation keys for performing various instructions to the projector main body 2. The operation keys provided on the operation panel 27 include a power key for switching the power on and off, a menu key for displaying a menu image (top menu) for performing various settings, and items on the menu image. Direction keys (four operation keys corresponding to up / down / left / right) used for selection and the like, a determination key for determining an item selected in the menu image, and the like are included. When the user operates various operation keys on the operation panel 27, the operation panel 27 outputs an operation signal corresponding to the operated operation key to the control unit 20.

  As with the operation panel 27, the remote controllers 41 and 42 have a plurality of operation keys such as a power key, a menu key, a direction key, and an enter key, and control codes corresponding to the operation keys operated by the user are transmitted in infrared. It transmits to the projector body 2 as a blinking signal (remote control signal). Here, as the format (communication method) of the remote control signal, there are a number of formats such as the NEC (registered trademark) format adopted by many manufacturers and the home-made cooperative format, as well as a format unique to the manufacturer. The two remote controllers 41 and 42 of the present embodiment transmit remote control signals in different formats. Thereafter, the format of the first remote controller 41 is “first format” and the second The format of the remote controller 42 is referred to as “second format”.

  The remote control signal receiver 28 receives remote control signals transmitted from the remote controls 41 and 42, and can receive both the first format and the second format. However, in the present embodiment, both formats cannot be made valid (receivable state) at the same time, and only one of the formats can be made valid. That is, in order to receive the remote control signal of the other format, it is necessary to change the setting and switch the effective format.

FIG. 2 is an explanatory diagram for explaining a remote control signal.
As shown in FIG. 2, the remote control signal transmitted from the remote controllers 41 and 42 includes a leader part and a data part. Of these, the data part is the main body of the remote control signal. In addition to the control code corresponding to the operation content (operated operation key), the code for identifying the manufacturer and device is the PPM (Pulse Position Modulation) system. It is modulated with. In the PPM system, one bit is represented by a combination of a period during which infrared is turned on (on period) and a period during which the infrared light is turned off (off period). In some formats, 0 or 1 is determined depending on the length of the on period (long or short).

  The leader part indicates the start of the remote control signal and is transmitted prior to the data part. The leader part is composed of an on period and an off period each having a predetermined length, but is set sufficiently longer than the on period and off period in the data part, so that the leader part can be easily identified. It is possible. Also, the length of the on period and the off period in the leader part varies depending on the format of the remote control signal, so the remote control signal format is determined by measuring the length of the on period and off period of the leader part of the received remote control signal. can do.

  Returning to FIG. 1, the remote control signal receiving unit 28 includes a light receiving unit 28a, a setting storage unit 28b, a signal processing unit 28c, and the like. The light receiving unit 28a is configured to include a light receiving element such as a photodiode, and receives a remote control signal transmitted from the remote controllers 41 and 42 and converts it into an electrical signal.

  The setting storage unit 28b stores information (valid format information) indicating which one of the two formats supported by the projector 1 is set valid, and includes a control code, a user operation content, and the like. Is stored in the data table. Note that the storage unit 21 stores two data tables for each format in advance, and when the effective format is switched, a data table of a new effective format is read from the storage unit 21 and set and stored. 28b (details will be described later).

  The signal processing unit 28c determines the format of the received remote control signal and determines whether the received remote control signal format is valid based on the valid format information stored in the setting storage unit 28b. If the received remote control signal format is a valid format, the signal processing unit 28c refers to the data table stored in the setting storage unit 28b to recognize the user's operation content, and the control unit 20 Notify On the other hand, when the format of the received remote control signal is not a valid format, the signal processing unit 28c discards the received remote control signal and does not notify the control unit 20.

  When the operation content is notified from the remote control signal receiving unit 28 (signal processing unit 28c), the control unit 20 executes control according to the operation content. For example, when the user operates the power key, the control unit 20 instructs the power circuit 25 to switch the power on and off. When the user operates the menu key, the control unit 20 instructs the OSD processing unit 24 to display a menu image (not shown).

  FIG. 3 is a flowchart for explaining the operation of the projector 1 when the effective format is switched. After the user operates a menu key provided on the operation panel 27 or the remote controllers 41 and 42 to superimpose a menu image (top menu) (not shown), the format of the remote controller is changed from among a plurality of items included in the top menu. When the item for selecting is selected, the control unit 20 operates according to the flow shown in FIG.

  As shown in FIG. 3, in step S101, the control unit 20 instructs the OSD processing unit 24 to superimpose and display an OSD image (format selection menu Mf) for selecting a valid format (see FIG. 4). ).

  As shown in FIG. 4, the format selection menu Mf is an OSD image for displaying a list of formats that can be received by the remote control signal receiver 28 and allowing the user to select a format to be validated. Here, two items of “first format” and “second format” are displayed vertically. One of these two items (format) ("first format" in the example of FIG. 4) has an emphasized color scheme, indicating that this item is selected. . The user can select an arbitrary format by operating the direction keys provided on the operation panel 27 or the remote controllers 41 and 42. When the user presses the decision key after selecting the format to be enabled, the format selection is performed. Is completed. Immediately after the format selection menu Mf is displayed, the format that is set to be valid at that time is selected.

  When the selection of the format is completed and the process proceeds to step S102, the control unit 20 determines whether or not a selection to switch the valid format has been made, that is, whether or not a format different from the format that is set to be valid at that time has been selected. Determine whether. And when selection which switches an effective format is made, it transfers to step S103. On the other hand, when a format that is set to be valid at that time is selected again, the control unit 20 ends the flow as it is.

  When the selection to switch the valid format is made and the process proceeds to step S103, the control unit 20 instructs the OSD processing unit 24 to display an OSD image (confirmation message Mc) for reconfirming the format switching. Superimposed display (see FIG. 5).

  As shown in FIG. 5, the confirmation message Mc includes a message for warning that the remote controller that has been used until now cannot be used when the format is switched, and a message for reconfirming the switching of the format. In the confirmation message Mc, two items “Yes” and “No” are displayed as answers to the reconfirmation, and “No” is selected. The user can select an arbitrary item by operating the direction keys provided on the operation panel 27 or the remote controllers 41 and 42. When the user operates the enter key after selecting one of the items, The selection is complete.

  In step S104, the control unit 20 determines whether or not format switching has been reconfirmed, that is, whether or not “Yes” has been selected in the confirmation message Mc. If “yes” is selected, the process proceeds to step S105. If “no” is selected, format switching is stopped and the flow ends.

  When “Yes” is selected and the process proceeds to step S105, the control unit 20 executes format switching. Specifically, the control unit 20 enables the new format by rewriting the valid format information in the setting storage unit 28b, reads out the data table for the validated format from the storage unit 21, and sets the setting storage unit 28b. Write to.

  In step S106, the control unit 20 shifts the projector 1 to the standby state and ends the flow. Specifically, after performing various end operations (for example, turning off the light source 11) for ending the operation of the projector 1, the control unit 20 instructs the power supply circuit 25 to operate power to each unit. Stop supplying.

  As a result, the projector main body 2 can receive a remote control signal of a format that is newly set to be valid, and an operation for turning on the power can also be performed with a remote control different from the previous one.

  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, since the remote control can be performed only with the remote control signal in the format set to be effective, even when the two projector main bodies 2 are arranged close to each other, If different formats are set to be valid, both projector main bodies 2 are not remotely operated by the same remote controller, and a plurality of projector main bodies 2 can be remotely operated individually. Further, since remote control is not possible except for the remote controller of the format set to be effective, it is possible to prevent an unintended remote operation from being performed by the other remote controller.

  (2) According to the projector 1 of the present embodiment, when the format to be validated is set, one format is selected from the list of formats displayed in the format selection menu Mf. Setting can be performed easily.

  (3) According to the projector 1 of the present embodiment, after the format to be validated is selected from the format selection menu Mf, the confirmation message Mc is displayed to reconfirm the format switching. Thus, it is possible to prevent the setting change (switching) of the effective format from being inadvertently performed.

  In the present embodiment, the control unit 20, the OSD processing unit 24, and the setting storage unit 28b when executing steps S101 to S105 (see FIG. 3) to set a valid format correspond to the format setting unit. .

(Modification)
Moreover, you may change the said embodiment as follows.

  In the above embodiment, the operation keys provided in the two remote controllers 41 and 42 are not necessarily the same. For example, as shown in FIG. 6, one remote controller (for example, the first remote controller 41) is a multi-function remote controller having a number of operation keys, and the other remote controller (for example, the second remote controller 42) is operated. It may be a simple remote controller in which the number of keys is reduced to limit the operation content. In such a configuration, normally, if the format of the second remote controller 42 (simple remote controller) is enabled, an unexpected operation (for example, advanced setting operation) may be performed with the multi-function remote controller. It becomes possible to prevent. Then, only when the operation with the multi-function remote controller is necessary, the effective format may be switched.

  In the above embodiment, the projector 1 has a configuration including the remote controllers 41 and 42. However, since a general-purpose remote controller can be used, the remote controllers 41 and 42 are not essential configurations. Further, only one of the two remote controllers may be provided.

  In the above embodiment, the remote control signal receiving unit 28 can receive remote control signals of two formats, but may be configured to receive three or more formats. In this case, even when three or more projector main bodies 2 are arranged close to each other, each can be remotely operated individually.

  In the above-described embodiment, the format is switched to the standby state after execution. However, it may be automatically restarted after that (the power is turned on). Further, the format switching may not be performed immediately after the format to be enabled is selected, and the format switching may be performed when the power is later turned off by the user. Further, if it is not necessary to shift to the standby state after executing the format switching, the power-on state may be maintained after the format switching.

  In the above embodiment, the remote controllers 41 and 42 and the projector main body 2 communicate with each other by infrared rays. However, optical communication other than infrared rays may be used, or a communication method using radio waves, ultrasonic waves, or the like may be used. It may be adopted.

  In the above embodiment, the three-plate projector 1 using the three liquid crystal light valves 12R, 12G, and 12B as the light modulation device has been described. However, the present invention is not limited to this. For example, it is possible to form an image with one liquid crystal light valve that includes sub-pixels that can transmit R light, G light, and B light in each pixel.

  In the above-described embodiment, the transmissive liquid crystal light valves 12R, 12G, and 12B are used as the light modulator, but a reflective light modulator such as a reflective liquid crystal light valve can also be used. Also, a micromirror array device that modulates the light emitted from the light source 11 by controlling the emission direction of the incident light for each micromirror as a pixel can be used.

  In the above 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 above embodiment, the projector 1 is described as an example of the image display device. However, a rear projector integrally provided with a transmissive screen, a CRT (cathode ray tube) display, a liquid crystal display, a plasma display, The present invention can also be applied to SED (Surface-conduction Electron-emitter Display), organic EL (Electro Luminescence) displays, and the like.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Projector main body, 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, DESCRIPTION OF SYMBOLS 20 ... Control part, 21 ... Memory | storage part, 22 ... Image information input part, 23 ... Image processing part, 24 ... OSD process part, 25 ... Power supply circuit, 26 ... Light source control part, 27 ... Operation panel, 28 ... Remote control signal reception 28a ... light receiving unit, 28b ... setting storage unit, 28c ... signal processing unit, 41 ... first remote control, 42 ... second remote control, Mc ... confirmation message, Mf ... format selection menu, C ... image output device, S ... Screen.

Claims (6)

An image display device that is remotely controlled by a remote control signal transmitted from a remote control,
A remote control signal receiver capable of receiving the remote control signals of a plurality of formats;
A format setting section for setting an effective format from the plurality of formats;
A control unit that performs control based on the remote control signal when the format of the remote control signal received by the remote control signal receiving unit is a format that is effectively set by the format setting unit;
A display unit for displaying an image based on the control of the control unit;
An image display device comprising: The image display device according to claim 1,
The image display device, wherein the format setting unit displays a list of the plurality of formats on the display unit, and selects a format to be set effectively from the list. The image display device according to claim 2,
The format setting unit displays a confirmation message on the display unit after a format to be set to be valid is selected, and after the confirmation by the confirmation message is made, sets the selected format to be valid. An image display device characterized by that. The image display device according to claim 1,
An image display device further comprising a remote controller that transmits a remote control signal of any one of the plurality of formats. The image display device according to claim 1,
An image display device further comprising a plurality of remote controllers that respectively transmit the remote control signals of the plurality of formats. The image display device according to claim 5,
The image display device according to claim 1, wherein the plurality of remote controls include a first remote control and a second remote control whose operation content is more limited than that of the first remote control.

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