JP2013080141A - Image display device, method of controlling image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device that can change a setting of control from a state of control by an external information processing apparatus to a state of control by an operation from an operation panel on a main body or a remote control, without performing special setting change operation.SOLUTION: An image display device 1 includes: mode setting means 20b for setting either one of an external control mode where the image display device 1 is controlled by control information from an external information processing apparatus and a normal mode where the image display device 1 is controlled by an operation to the image display device 1; and control means for setting, after a first time has passed from the reception of the control information (step S108:Y), the normal mode to the mode setting means 20b (step S109).

Description

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

  A projector that allows an image display device (projector) and an information processing device (personal computer: PC) to be connected by a serial cable or the like so that various controls such as power on / off and input switching can be controlled on the PC side. It has been known.

  In such a projector, when it is in a state that can be controlled by a PC, an operation with a remote controller (remote control) provided as an accessory of the projector and an operation panel provided on the projector main body are performed. It preferably has a function of invalidating the operation. As described above, various projectors having a function of invalidating the operation on the remote controller and the operation on the operation panel have been proposed (see, for example, Patent Document 1).

  The projector described in Patent Document 1 has a remote control number switching function. When invalidating the operation on the remote control, a setting change operation such as switching the remote control number to a number different from the registered number is performed. The operation with the remote control can be invalidated. Further, even when the operation on the operation panel is invalidated, the operation on the operation panel can be invalidated by the user changing the setting for invalidating the operation. Thereby, for example, when the projector can be controlled by the PC, the operation on the remote controller and the operation on the operation panel can be invalidated.

JP 2009-239720 A

  In order for the projector described in Patent Document 1 to disable the operation on the operation unit in order to control the projector by the PC, and then terminate the projector control by the PC and perform the operation on the operation unit. The user must change the setting to validate the operation each time. In particular, during a presentation or the like, there has been a problem that such a setting cannot be performed smoothly if the setting is performed each time.

  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 can be controlled by an external information processing device, and communicates with the information processing device and operation receiving means for receiving an operation on the image display device. A communication means; a control information receiving means for receiving control information for the image display apparatus from the information processing apparatus via the communication means; an external control mode in which the image display apparatus is controlled by the control information; and the operation A mode setting means for setting one of the normal modes controlled by the control means, and a control means for setting the normal mode in the mode setting means when a first time has elapsed after receiving the control information; It is provided with.

  According to this application example, the normal mode is set in the mode setting unit when the first time has elapsed after receiving the control information from the information processing apparatus. As a result, when the control program from the information processing apparatus ends and control information is not sent even after a predetermined time (first time) has elapsed, the setting is automatically changed from the external control mode to the normal mode. Therefore, the operation of the operation accepting unit of the image display device can be validated without the user performing a setting change operation.

  Application Example 2 In the image display device according to the application example, the first time is set by the control information.

  According to this application example, the waiting time (first time) from when the image display apparatus receives the control information to when switching to the normal mode can be set by the control information from the information processing apparatus. As a result, the first time is shorter than the transmission interval of the control information by the control program of the information processing device, and the image display device is prevented from switching to the normal mode before the control information from the information processing device arrives. it can.

  Application Example 3 In the image display device according to the application example, the control unit turns off the power of the image display device when the first time has elapsed after receiving the control information. It is characterized by.

  According to this application example, when the first time has elapsed since the image display device received the control information, the image display device can be turned off. When the control information is not sent even after the first time elapses, such as when the control on the information processing device side ends or when some abnormality occurs in the information processing device, the power supply of the image display device Can be automatically turned off.

  Application Example 4 An image display apparatus control method according to this application example includes an operation receiving unit that receives an external operation, a communication unit that communicates with an external information processing apparatus, and an external control mode that is controlled by control information. Or a mode setting means for setting any one of the normal modes controlled by the operation, and a control method for the image display apparatus that can be controlled by the information processing apparatus, through the communication means, A control information receiving step for receiving control information for the image display device from the information processing device, and a normal mode setting for setting the normal mode in the mode setting means when a first time has passed since the control information was received. And a step.

  According to this application example, the normal mode is set in the mode setting unit when the first time has elapsed after receiving the control information from the information processing apparatus. As a result, when the control program from the information processing apparatus is terminated and control information is not sent for a predetermined time, the setting is automatically changed from the external control mode to the normal mode, so that the user performs a setting change operation. Instead, the operation of the operation accepting unit of the image display apparatus can be validated.

The figure explaining the external control of a projector. The block diagram which shows the circuit structure of a projector. The flowchart which shows operation | movement when a projector detects the control information from the outside. The flowchart which shows operation | movement when a projector receives the operation signal.

  Hereinafter, a projector which is an embodiment of an image display device according to the present invention will be described with reference to the accompanying drawings. However, the following embodiment does not limit the invention according to the claims, and the embodiment Not all of the combinations of features in are necessarily essential for the solution of the invention.

(First embodiment)
FIG. 1 is a diagram for explaining the external control of the projector 1 according to the present embodiment. As shown in FIG. 1, the projector 1 communicates with a personal computer (also referred to as a PC) 200 as an information processing apparatus via a communication cable 300.

The communication cable 300 connects the projector 1 and the PC 200 so that they can communicate bidirectionally, and an RS-232C cable or the like can be used.
In the present embodiment, the communication between the projector 1 and the PC 200 is a wired method using the communication cable 300, but may be a wireless method.

The projector 1 is powered on by an operation on a remote controller (also referred to as a remote controller or RC) 25 provided as an accessory of the projector 1 or an operation on the input operation means 23 provided on the housing of the projector 1. Various controls such as on / off and input switching can be performed.
Such a state in which the projector 1 is controlled by operation is referred to as a normal mode.

The PC 200 includes a projector control unit 210 that controls the projector 1. The projector control unit 210 has a control program for controlling the projector 1. Accordingly, various controls such as power on / off of the projector 1 and input switching can be performed by control information from the PC 200 side via the communication means.
A state in which the projector 1 is controlled by the control information in this way is referred to as an external control mode.

FIG. 2 is a block diagram illustrating a circuit configuration of the projector 1 according to the present embodiment.
As shown in FIG. 2, 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 projection unit 10, a control unit 20, a storage unit 21, and a light source control unit 22. The input operation means 23, the operation signal receiving means 24, the communication means 30, the control information receiving means 31, the power supply unit 40, the power supply terminal 41, and the like are housed in a casing (not shown).

  The image projection means 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 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. Further, in the image projection means 10, a transmissive liquid crystal type projection optical system using the light source 11 and three liquid crystal light valves 12R, 12G, and 12B as light modulators is exemplified. You may employ | adopt the light modulation apparatus of other display systems, such as a 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.

In the present embodiment, the control means 20 includes a timer 20a for measuring time and a mode setting means 20b.
The mode setting means 20b is controlled by an external control mode in which the projector 1 is controlled by control information (control command) received by the control information receiving means 31, or by an operation (operation signal) of the input operation means 23 or the remote controller 25. One of the normal modes is set.

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.
In the present embodiment, the storage means 21 includes an automatic power-off flag 21a that is set at the time of setting to turn off the power when no control command is received. The automatic power-off flag 21a is set and cleared from a setting menu which will be described later or by a control command from an external information processing apparatus.

  The input operation means 23 is provided on the outer surface of the housing of the projector 1 and receives an operation on the projector 1 from the user, and includes a plurality of operation keys for the user to perform various instructions.

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, a help 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 operation signal receiving unit 24 receives an operation signal from a remote controller 25 that allows the user to remotely operate the projector 1, and outputs the operation content of the user to the control unit 20.
The operation keys of the remote controller 25 include a power key, input switching key, menu key, cursor key, determination key, escape key, help key equivalent to the input operation means 23, screen mute key, color mode switching key, number There are input keys.
In the present embodiment, the input operation unit 23, the remote controller 25, and the operation signal reception unit 24 correspond to the operation reception unit.

  The communication unit 30 performs bidirectional communication with the PC 200 via the communication cable 300.

The control information receiving unit 31 receives control information (control command) from the PC 200 via the communication unit 30 and notifies the control unit 20 of the control information. Control commands from the PC 200 include power on / off of the projector 1, input switching, various mode setting commands, and the like.
Among them, the command waiting time setting command is to set the first time T1, which is also the command waiting time in the present embodiment, and when the first time T1 has elapsed since the last control command was received. The mode setting means 20b changes the setting from the external control mode to the normal mode.

  Various types of image signals are input to the plurality of image input terminals 6 from an external image supply device (not shown), and the input image signals are supplied to the image input selection means 5.

  The image input selection unit 5 selects one image input terminal 6 based on an instruction from the control unit 20 among the plurality of image input terminals 6, and performs image signal processing on an image signal input to the one image input terminal 6. Output to means 3. When the user designates one desired image input terminal 6 by operating the input switching key provided in the input operation means 23, the control means 20 causes the image signal input to the one image input terminal 6 to be image signal processing means. 3 is instructed to the image input selection means 5 so that it is output to 3.

The image signal processing unit 3 converts the image signal input from the image input selection unit 5 into image data representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B. Here, the converted image data is for each color light of R, G, B, and is composed of a plurality of pixel values corresponding to all the pixels of the liquid crystal light valves 12R, 12G, 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.
Further, the image signal processing unit 3 performs image quality adjustment processing for adjusting brightness, contrast, sharpness, hue, and the like on the converted image data based on an instruction from the control unit 20, and the processed image is processed. Data is output to the OSD processing means 4.

The OSD processing unit 4 performs processing for superimposing and displaying an OSD (on-screen display) image such as a setting 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 onto the screen SC.

  The light source control unit 22 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 power supply unit 40 is supplied with electric power from the outside via a power supply terminal 41 connected to a commercial power supply such as AC100V. The power supply unit 40 converts the input power into predetermined DC power and supplies the power to each unit of the projector 1. In addition, the power supply unit 40 is configured to supply power (operating power) necessary for image projection to each unit (power-on state) and stop supplying operating power based on an instruction from the control unit 20. It is possible to switch between a state (standby state) of waiting for an operation for turning on.

  Next, the operation of the projector 1 according to the present embodiment will be described with reference to the flowcharts of FIGS. 3 and 4.

(When projector 1 detects external control information)
As shown in FIG. 3, when the projector 1 detects control information from the outside (step S101), the mode setting unit 20b is set to the external control mode (step S102), and the process proceeds to step S103. As a method for setting the external control mode, there are an operation from a setting menu, a combination operation of specific keys of the input operation means 23 or the remote controller 25, and the like.

  In step S103, the control means 20 starts measuring time by the timer 20a, and proceeds to step S104.

  In step S104, the control unit 20 checks whether control information (control command) is received from the control information receiving unit 31. If a control command has been received (step S104: Y), the process proceeds to step S105. If no control command has been received (step S104: N), the process proceeds to step S108. Step S104 corresponds to a control information receiving step.

  In step S105, the control means 20 checks whether or not the control command received in step S104 is a command waiting time setting command. When the received control command is a command waiting time setting command (step S105: Y), the process proceeds to step S107. When it is not a command waiting time setting command (step S105: N), the process proceeds to step S106.

  In step S106, the control means 20 executes processing of the control command received in step S104, and the process proceeds to step S103.

  In step S107, the control unit 20 sets (changes) the value of the first time T1 based on the command waiting time setting command received in step S104, and the process proceeds to step S103.

In step S108, the control means 20 checks whether or not the time measured by the timer 20a has passed the first time T1. When the timer 20a has passed the first time T1 (step S108: Y), the process proceeds to step S109. When the timer 20a has not passed the first time T1 (step S108: N), the process proceeds to step S104.
Here, the first time T1 is the command waiting time as described above, and is set to, for example, 1 minute in the initial state, and the setting is changed by the command waiting time setting command as described in step S107. Is possible.

  In step S109, the mode setting means 20b is set to the normal mode, and the process proceeds to step S110. Step S109 corresponds to a normal mode setting step. In addition, since the mode setting means 20b is set to the external control mode between step S103 and step S108, the input operation of the input operation means 23 and the remote controller 25 is not accepted.

  In step S110, the control means 20 checks whether or not the automatic power off flag 21a is set. When the automatic power-off flag 21a is set (step S110: Y), the process proceeds to step S112. When the automatic power off flag 21a is not set (step S110: N), the process proceeds to step S111.

  In step S111, the operation flow ends.

  In step S112, the control unit 20 turns off the power of the projector 1 and shifts to the standby state.

(When projector 1 receives an operation signal)
As shown in FIG. 4, when the projector 1 receives an operation signal from the operation signal receiving unit 24 by the input operation unit 23 or the remote controller 25 (step S201), the control unit 20 sets the mode setting unit 20b to the normal mode. It is checked whether or not (step S202). When the mode setting unit 20b is set to the normal mode (step S202: Y), the process proceeds to step S203. When the mode setting means 20b is not set to the normal mode, that is, set to the external control mode (step S202: N), the process proceeds to step S204.

  In step S203, the control unit 20 executes processing based on the operation signal received in step S201, and the process proceeds to step S204.

  In step S204, the operation flow ends.

  As described above, according to the projector 1 of the present embodiment, the mode setting unit 20b is set from the external control mode to the normal mode when the first time T1 has elapsed after receiving control information from the PC 200. The As a result, when the control program of the PC 200 is terminated and control information is not sent for the first time T1, the mode setting means 20b is automatically changed from the external control mode to the normal mode, so that the user However, the operation by the input operation means 23 and the remote controller 25 of the projector 1 can be validated without performing the setting change operation.

  Further, the waiting time (first time T1) from when the projector 1 receives the control information to when switching to the normal mode can be set by the control information from the PC 200. Thereby, the first time T1 is shorter than the control information transmission interval by the control program of the PC 200, and the projector 1 switches the mode setting means 20b to the normal mode before the control information from the PC 200 arrives. Can be prevented.

  In addition, since the projector 1 can be turned off when the first time T1 has elapsed since the projector 1 received the control information, the control of the PC 200 is completed while the projector 1 is being used for demonstration or the like. When the control information is not sent during the first time T1, such as when some abnormality occurs in the PC 200, the projector 1 can be automatically turned off.

Moreover, you may change the said embodiment as follows.
(Modification 1)
In the present embodiment, when the control information from the outside is detected, the mode setting unit 20b is immediately set to the external control mode, but the state where the operation by the input operation unit 23 or the remote controller 25 is not detected is the predetermined second. After the time T2 is continued, the mode setting means 20b may be set to the external control mode.
As a result, it is possible to prevent the mode setting unit 20b from being set to the external control mode while the user is operating the input operation unit 23 or the remote controller 25, and the operation being input cannot be accepted thereafter.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 3 ... Image signal processing means, 4 ... OSD processing means, 5 ... Image input selection means, 6 ... Image input terminal, 10 ... Image projection means, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve, DESCRIPTION OF SYMBOLS 13 ... Projection lens, 14 ... Liquid crystal drive means, 20 ... Control means, 20a ... Timer, 20b ... Mode setting means, 21 ... Memory | storage means, 21a ... Automatic power-off flag, 22 ... Light source control means, 23 ... Input operation means, 24 ... Operation signal receiving means, 25 ... Remote controller (remote controller / RC), 30 ... Communication means, 31 ... Control signal receiving means, 40 ... Power supply unit, 41 ... Power supply terminal, 200 ... PC (information processing apparatus), 210 ... Projector Control unit, 300 ... communication cable.

Claims (4)

An image display device that can be controlled by an external information processing device,
Operation accepting means for accepting an operation on the image display device;
Communication means for communicating with the information processing apparatus;
Control information receiving means for receiving control information for the image display apparatus from the information processing apparatus via the communication means;
A mode setting means in which the image display device is set to one of an external control mode controlled by the control information and a normal mode controlled by the operation;
Control means for setting the normal mode in the mode setting means when a first time has passed since the control information was received;
An image display device comprising: The image display device according to claim 1,
The first time is set by the control information.
An image display device characterized by that. The image display device according to claim 1 or 2,
The control means turns off the power of the image display device when the first time has elapsed since the control information was received;
An image display device characterized by that. Mode setting in which an operation accepting unit that accepts an external operation, a communication unit that communicates with an external information processing apparatus, and an external control mode controlled by control information or a normal mode controlled by the operation are set And a control method of the image display device that can be controlled by the information processing device,
A control information receiving step for receiving control information for the image display device from the information processing device via the communication means;
A normal mode setting step of setting the normal mode in the mode setting means when a first time has passed since the control information was received;
A method for controlling an image display device, comprising:

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