JP2012083553A - Projection type display device and control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type display device that detects malfunction of a shutter at the start-up of the device, and if malfunction is detected, carries out processing for addressing the malfunction, as well as a control method of the device.SOLUTION: A control method of a projection type display device includes the following steps of: determining whether or not an opening/closing state of an exhaust port shutter is normal at the start-up of the device body before starting the drive of an image projection unit (steps S2A, S4A); carrying out retry control for operating the exhaust port shutter if the state is determined not to be normal (steps S5A, S3A); and carrying out error processing if the exhaust port shutter is not operated (step S8A).

Description

  The present invention relates to a projection display apparatus having a shutter that opens and closes a ventilation opening and a control method thereof.

  A projection display device (projector) has been proposed that has an open / close mechanism (shutter) that opens and closes an exhaust port (ventilation opening) and uses a drive motor as a drive source of the open / close mechanism ( For example, see Patent Documents 1, 2, and 3). This type of opening / closing mechanism is configured to be driven in response to a power-on or power-off switch operation.

Japanese Patent No. 4023490 Japanese Patent No. 3827644 Japanese Patent No. 3453775

Incidentally, the above-mentioned patent document does not describe the operation in the abnormal state of the opening / closing mechanism. If it is configured so that an abnormal state can be detected and an error state occurs when an abnormality occurs, an error occurs and the projection display device cannot be activated and cannot be used.
On the other hand, if the projection display device can be used even in the event of an abnormality, the user may use the projection display device without noticing the abnormality, and if the opening / closing mechanism does not open, the projection display device There is a risk that the temperature will rise.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a projection display device capable of confirming an abnormality of a shutter at the time of activation and executing a process corresponding to the abnormality, and a control method thereof. .

In order to achieve the above object, the present invention provides, in a projection display device, an apparatus main body including an image projection unit that projects an image, a shutter that opens and closes a ventilation opening included in the apparatus main body, and the shutter. A shutter driving unit for driving, an open / close detecting unit for detecting an open / closed state of the shutter, and at the start of the apparatus main body, before starting the driving of the image projection unit, the shutter detected by the open / close detecting unit It is determined whether or not the open / closed state is abnormal, and when it is determined to be abnormal, the shutter driving unit performs control to operate the shutter, and if the shutter does not operate, a control unit that performs error processing is provided. It is characterized by.
According to this configuration, it is possible to check for a shutter error at startup and execute error processing only when the shutter error cannot be recovered even after retrying. Corresponding processing can be appropriately executed.

In the above-described configuration, the apparatus main body includes a fan that ventilates the opening, and the control unit detects the opening / closing before starting the driving of the image projection unit and the fan when the apparatus main body is activated. It may be determined whether the opening / closing state of the shutter detected by the unit is abnormal. According to this configuration, it is possible to determine whether or not there is a shutter abnormality before starting the driving of the part related to heat generation and cooling, and the situation where the internal temperature becomes high or the fan is driven with the shutter closed. Can be avoided.
In the above configuration, the control unit may retry control for closing the shutter when the shutter is not closed, and may perform error processing when the shutter is not closed even after retrying. According to this configuration, it is possible to avoid a situation in which a state in which dust and insects easily enter is left.

In the above configuration, the control unit performs control to open the shutter before starting to drive the image projection unit, and if the shutter is not opened, the control to retry opening the shutter is retried. Alternatively, error processing may be performed when the shutter is not opened. According to this configuration, it is possible to avoid a situation where the image projection unit is driven in a state where the shutter is not opened, and a situation where the internal temperature becomes high can be avoided reliably. In addition, since the confirmation of the shutter closing operation and the shutter opening operation are performed at the time of activation, it is possible to confirm both the shutter opening and closing operations.
Further, in the above configuration, the apparatus main body includes an intake port provided with a dustproof filter and an exhaust port that opens without being provided with a dustproof filter and serves as the opening for ventilation. The apparatus main body may be configured to be dust-proof by closing the shutter when it is off, and the dust-proof filter and the shutter that opens and closes the exhaust port. According to this configuration, dust and insects can be prevented from entering from the air intake by the dust filter, and the air vent of the projection display can be closed by closing the air outlet with the shutter, thus preventing dust and insects from entering. can do.

In the projection display device, the present invention provides an apparatus main body including an image projection unit that projects an image, a shutter that opens and closes a ventilation opening included in the apparatus main body, a shutter drive unit that drives the shutter, An open / close detection unit that detects an open / close state of the shutter, and a control that monitors whether the shutter is open by the open / close detection unit after the apparatus main body is activated, and performs error processing when the shutter is not open And a section.
According to this configuration, it is possible to avoid a situation in which the shutter is closed due to some trouble and the internal temperature is likely to rise after starting.
In this case, the shutter is a shutter mechanism that opens and closes by driving a solenoid, and includes a biasing member that biases the shutter toward the closing side, and the shutter driving unit releases the holding force of the solenoid to Since the shutter is closed by the urging force of the urging member, the shutter can be closed in a shorter time than when the motor is driven to close, and the exhaust port shutter is urged by the urging member even if a solenoid malfunctions. Can be easily closed.

In addition, the present invention provides an apparatus main body including an image projection unit that projects an image, a shutter that opens and closes a ventilation opening included in the apparatus main body, a shutter drive unit that drives the shutter, and an open / close state of the shutter In the control method of the projection type display device comprising an open / close detection unit for detecting the open / close state of the shutter, the open / close state of the shutter detected by the open / close detection unit before starting the driving of the image projection unit at the start-up of the device main body If the shutter is not abnormal, control is performed so that the shutter is operated. If the shutter is not operated, error processing is performed.
According to this configuration, it is possible to check for an abnormality of the shutter at the time of activation and execute error processing only when the shutter abnormality cannot be recovered even after retrying, and it is possible to appropriately execute processing corresponding to the abnormality.

  In the above configuration, when starting the apparatus main body, before starting the driving of the fan that ventilates the image projection unit and the opening, it is determined whether or not the opening / closing state of the shutter detected by the opening / closing detection unit is abnormal. You may make it determine. Further, the control for closing the shutter may be retried when the shutter is not closed, and error processing may be performed when the shutter does not close even after retrying. Also, before starting to drive the image projection unit, control is performed to open the shutter, and if the shutter is not opened, the control to open the shutter is retried. Processing may be performed.

  According to the present invention, it is possible to confirm an abnormality of the shutter at the time of activation and appropriately execute a process corresponding to the abnormality.

It is a figure which shows the internal structure of the projector which concerns on embodiment of this invention. It is a block diagram which shows the function structure of a projector. It is a perspective view which shows the open state of an exhaust port shutter. It is a disassembled perspective view of an exhaust port shutter. It is a figure which shows the closed state of an exhaust-port shutter. It is a figure which shows a solenoid with a periphery structure. It is a flowchart which shows shutter control at the time of starting. It is a flowchart which shows the shutter monitoring process after starting. It is a flowchart which shows shutter control at the time of operation stop.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating an internal structure of a projector (projection display device) 10 according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a functional configuration of the projector 10.
As shown in FIG. 1, the projector 10 includes an image projection unit 21 that projects image light representing an image, and the image projection unit 21 displays an image (projected image) on a screen (not shown) serving as a projection surface. An apparatus main body 12 in which projector components such as the image projection unit 21 are arranged in a housing 11 and an exterior cover (not shown) that covers the apparatus main body 12 are provided.
The housing 11 has a substantially rectangular shape in a plan view, and an intake port 15 is provided on one side of the left and right side surfaces (short sides) 11L and 11R of the housing 11 and an exhaust port 16 is provided on the other side. Here, in FIG. 1, the front surface of the housing 11 (the surface on which the projection lens 53 of the image projection unit 21 is exposed) is denoted by reference numeral 11A, and the rear surface of the housing 11 is denoted by reference numeral 11B. When the housing 11 is viewed from the front surface 11A, the left side is denoted as a left side 11L, and the right side is denoted as a right side 11R.

  In the housing 11, a cooling fan 31 is disposed on the intake port 15 side, and an exhaust port shutter 32 is disposed on the exhaust port 16 side. An image is formed in a region between the cooling fan 31 and the exhaust port shutter 32. Projection unit 21 and power supply unit 22 are arranged. Further, a circuit board 33 having a control unit 44 shown in FIG. The exterior cover covers the housing 11 except for the intake port 15 and the exhaust port 16. Accordingly, outside air is introduced into the housing 11 from the air inlet 15 by the cooling fan 31, and each part such as the image projection unit 21 is cooled by the cooling air and then discharged from the air outlet 16.

In the projector 10 of this configuration, as shown in FIG. 1, a dust-proof filter 34 is disposed in the intake port 15 on one side of the ventilation opening, and the exhaust port 16 on the other side of the ventilation opening. Since the exhaust port shutter 32 for opening and closing the exhaust port 16 is disposed, it is possible to prevent intrusion of dust or insects from any of the openings 15 and 16. That is, the projector 10 is configured as a dustproof projector suitable for use in a dusty area.
Further, the projector 10 of this configuration performs cooling by the cooling fan 31 when each part such as the image projection unit 21 is operated. However, when the operation of each part is stopped by improving the material of each part, the cooling by the cooling fan 31 becomes unnecessary immediately. It is configured to be able to.

The power supply unit 22 is connected to an outlet installed indoors or the like via a plug (not shown), thereby receiving power supply from an external power source, which is a commercial power supply sent from an electric power company, and supplying power to each unit of the projector 10 To do. That is, the projector 10 drives an external power source as operating power.
The circuit board 33 includes a signal processing unit 41, a projection system driving unit 42, a storage unit 43, a control unit 44, an audio driving unit 45, a fan driving unit 46, a lamp driving unit 47, a terminal driving unit 48, and an exhaust port shutter. A drive unit 49 is provided (see FIG. 2).
As shown in FIG. 2, the signal processing unit 41 receives a video signal SA (in this configuration, an image-only signal or both an image and an audio from an external device (such as a personal computer or a DVD player) 18 connected by a cable. Image processing system that inputs image signals corresponding to the signal SA, and an audio processing system that performs audio processing on the audio data corresponding to the signal SA.
Here, the image processing system performs IP conversion for converting the format of the image data from the interlace method to the progressive method, resolution conversion processing for expanding or reducing the size of the IP converted image data, brightness, and saturation. Various color corrections such as adjustment are performed.

The projection system drive unit 42 functions as a liquid crystal panel drive unit and a light source drive unit that drive the liquid crystal panel 52 and the light source device 51 of the image projection unit 21, and image data subjected to image processing by the signal processing unit 41. Based on this, the liquid crystal panel 52 and the light source device 51 are driven to display an image.
As shown in FIG. 1, the image projection unit 21 extends along the back surface 11 </ b> B which is one of the long sides of the housing 11 and extends to the front surface 11 </ b> A along the side surfaces 11 </ b> L and 11 </ b> R which are short sides of the housing 11. A light source device 51 that has a substantially L shape in plan view and extends as a light source, a liquid crystal panel (also referred to as a liquid crystal light valve) 52 (52R, 52G, 52B), and a projection lens 53 I have.
The light source device 51 includes a xenon lamp, an ultrahigh pressure mercury lamp, an LED (Light Emitting Diode), or the like. The liquid crystal panel 52 is composed of a transmissive liquid crystal panel in which a plurality of pixels are arranged in a matrix, and the illumination light (from the light source device 51 ( 1 is modulated into image light representing an image and emitted from the projection lens 53.

In the present embodiment, the projector 10 is a 3LCD projector. In this case, as shown in FIG. 1, the optical components for separating and condensing light of the three liquid crystal panels 52R, 52G, and 52B and the light source device 51 corresponding to the three colors R, G, and B are used. Components (lenses 321 to 324, 341, 343, dimmer 325, dichroic mirrors 331, 332, reflection mirrors 333, 342, 344, polarizing plates 351, 353, prism 354, etc.) are provided.
With this configuration, the light emitted from the light source device 51 is separated into light of three colors R, G, and B, transmitted through the liquid crystal panels 52R, 52G, and 52B, and synthesized by the prism 354 to generate a color image. Can do. Note that the configuration of the image projection unit 21 is not limited to the configuration illustrated in FIG. 1, and a known configuration can be widely applied, and a known configuration including one liquid crystal panel 52 may be applied.

As shown in FIG. 2, the storage unit 43 stores various programs such as a control program and various data.
The control unit 44 functions as a computer that controls each unit of the projector 10 by reading and executing the control program stored in the storage unit 43.
The projector 10 includes an audio output unit 35 such as a speaker, an indicator lamp (LED in the present embodiment) 36 for notifying the user of the operation state of the projector 10 (power on, standby state, error state, etc.), trigger Output terminal 37 for outputting the power-out and power signal (USB bus power) (trigger-out terminal for outputting trigger-out to an external device (not shown), USB terminal, etc.) and various operators for the user to give various instructions An operation unit 38 and the like are further provided.

The sound drive unit 45 drives the sound output unit 35 of the projector 10 under the control of the control unit 44, and the sound corresponding to the sound data output from the signal processing unit 41, the operation sound, the warning sound, etc. Play various sounds.
Under the control of the control unit 44, the lamp driving unit 47 selectively drives / non-drives (including blinking) a plurality of indicator lamps (notification units) 36 to turn on / off each indicator lamp 36, As a result, the power is on and in the standby state (power saving state compared to the power on. A state in which some functions are enabled (for example, operation of the main body operation unit (operation unit 38) or remote control operation not illustrated) The monitor out function is enabled)), and the error status is notified to the user.
The terminal drive unit 48 is triggered to notify the external device (screen device or the like) that the projector 10 is turned on under the control of the control unit 44, or to supply power to the USB-connected external device. The signal is output to the outside via the output terminal 37.

The exhaust port shutter drive unit (shutter drive unit) 49 opens and closes the exhaust port shutter 32 under the control of the control unit 44, and when the power is turned on by the operation of the operation unit 38, the exhaust port shutter 32. When the power is turned off by the operation of the operation unit 38, the exhaust port shutter 32 is driven to close.
The open / close detection unit 50 is a switch mechanism that detects opening / closing of the exhaust port shutter 32. The control unit 44 can detect the open / closed state of the exhaust port shutter 32 by acquiring the detection result of the open / close detection unit 50.

Here, FIG. 3 is a perspective view showing an open state of the exhaust port shutter 32, and FIG. 4 is an exploded perspective view of the exhaust port shutter 32. FIG. 5 is a view showing a closed state of the exhaust port shutter 32.
As shown in FIGS. 3 to 5, the exhaust shutter 32 is openable and closable with a rectangular frame-shaped frame 33 </ b> A and an opening in the frame 33 </ b> A (an opening communicating with the exhaust 16) spaced in the longitudinal direction. A plurality of (eight in this configuration) louvers 33B, a cam plate 33C slidably disposed on the frame frame 33A, and a solenoid 33D for operating the cam plate 33C.

As shown in FIG. 4, the frame frame 33A includes a plate-like member 33E that constitutes a part of the upper frame, and the upper and lower ends of each louver 33B by the lower frame and the plate-like member 33E of the frame frame 33A. The rotating shaft J1 protruding in the direction is supported rotatably.
A cam plate 33C is slidably supported on the plate-like member 33E, and a protruding shaft J2 that protrudes upward from the rotation shaft J1 of each louver 33B is inserted into the cam plate 33C. The
Thus, when the cam plate 33C is slid, all the louvers 33B rotate about the rotation axis J1 to open and close the opening of the frame frame 33A.
The solenoid 33D is fixed to the frame 33A, and the plunger P of the solenoid 33D is connected to one end of the cam plate 33C. In the figure, reference numeral 33K denotes a circuit board for driving the solenoid.

The exhaust port shutter 32 is provided with an urging member (in this embodiment, a tension coil spring) 33S that urges the cam plate 33C toward the shutter closing side, and the urging member 33S reliably holds the exhaust port shutter 32. It can be kept closed.
The solenoid 33D is a keep solenoid type (also referred to as a self-holding type) solenoid, and the cam shutter 33C is pulled toward the solenoid 33D against the urging force of the urging member 33S by the exhaust port shutter drive unit 49. The exhaust port shutter 32 is driven to open (solenoid attraction operation), and is attracted by the magnetomotive force of a built-in permanent magnet, whereby the exhaust port shutter 32 is held open (solenoid attraction operation).
Further, the solenoid 33D is driven to close the exhaust port shutter 32 by the exhaust port shutter drive unit 49 being restored by the reverse magnetomotive force of the coil that cancels the magnetomotive force of the built-in permanent magnet (the solenoid recovery operation). ).
The opening / closing detector 50 that detects the opening / closing of the exhaust port shutter 32 includes a switch mechanism that is attached to the plate-like member 33E of the exhaust port shutter 32 and opens / closes according to the position of the cam plate 33C.

FIG. 6 is a diagram showing the solenoid 33D together with the peripheral configuration.
As shown in FIG. 6, two control lines consisting of a + control line LP and a −control line LN are connected to the solenoid 33D, and the control unit 44 applies voltages and voltages to the control lines LP and LN. By changing the direction, the solenoid 33D is activated, and the exhaust port shutter 32 is driven to open and close.
When the protruding portion 33C1 (see FIG. 6) provided on the cam plate 33C comes into contact with the open / close detection unit 50, the switch mechanism is turned on / off. More specifically, when the exhaust port shutter 32 is open, the open / close detection unit 50 is turned on, the potential of the wiring connected to the open / close detection unit 50 becomes H level, and the exhaust port shutter 32 is completely closed. The open / close detection unit 50 is turned off, and the potential of the wiring becomes L level.
The control unit 44 inputs the signal of this wiring as the detection signal SK, and can detect whether the exhaust port shutter 32 is open or closed according to the signal level of the detection signal SK.

By the way, since the projector 10 is a dustproof projector, the exhaust port shutter 32 is closed while the projector 10 is not used, so that dust, insects, and the like can enter from the outside when the projector 10 is left or transported. It is the structure which can prevent reliably.
However, if a problem occurs in the exhaust port shutter 32, the exhaust port shutter 32 remains closed without being opened when the power is turned on, resulting in a situation where sufficient cooling cannot be performed, or when the operation is stopped due to the power being turned off. There is a possibility that the shutter 32 may remain open without closing.
In this configuration, in order to deal with such a malfunction of the exhaust port shutter 32, shutter control at startup (also referred to as power-on shutter control) is performed at startup, shutter monitoring processing is performed after startup, and operation is stopped when operation is stopped. Hour shutter control (also called power-off shutter control) is performed.

FIG. 7 is a flowchart showing the startup shutter control.
Before explaining this control, as a premise, in the projector 10, the exhaust outlet shutter 32 is driven to close when the power is turned off, and the exhaust outlet shutter 32 is closed when not in use. The closing drive when the power is turned off is described in shutter control during operation stop (power-off shutter control) described later.
Further, in the following description, when the exhaust shutter driving unit 49 and the other driving units 42 to 48 are particularly distinguished and described, the other driving units 42 to 48 are collectively combined with the driving unit K1 (in FIG. 2). The drive object of the drive unit K1 is collectively expressed as a driven part K2 (enclosed by a two-dot chain line in the drawing).

This startup shutter control is executed when a “Power” key on the operation unit 38 is operated by the user and the startup process is started by the control unit 44. More specifically, when the “Power” key is operated, the control unit 44 performs this “start-up shutter control” prior to the start-up process of the driven unit K2 other than the exhaust port shutter 32. That is, “startup shutter control” is performed before starting the image projection unit 21 or the like that generates relatively large heat by the light source device 51 or the like and before starting the cooling fan 31.
As shown in FIG. 7, the control unit 44 first sets the + control line LP and the − control line LN to the L level by the exhaust port shutter driving unit 49, and initially sets the solenoid 33D to the non-energized state (step S1A). ). Then, after a predetermined waiting time (for example, 10 msec) has elapsed, the control unit 44 determines whether or not the exhaust port shutter 32 is closed based on the detection signal SK of the open / close detection unit 50 (step S2A).

Here, if the exhaust port shutter 32 is operating normally, the exhaust port shutter 32 should be closed. If the exhaust port shutter 32 is closed (step S2A: YES), the control unit 44 The exhaust port shutter drive unit 49 opens the exhaust port shutter 32 (step S3A).
In this step S3A, the control unit 44 starts the suction operation of the solenoid 33D by setting the + control line LP to the H level by the exhaust port shutter driving unit 49 and starting energizing the solenoid 33D, and for a predetermined time (in this configuration, After waiting for 200 msec), the + control line LP is switched to L level to stop energization.
Here, the reason for setting the waiting time is to secure a sufficient time for the suction operation of the solenoid 33D and to obtain a sufficient time for the opening driving of the exhaust port shutter 32.

Subsequently, the control unit 44 determines whether or not the exhaust port shutter 32 is open based on the detection signal SK of the open / close detection unit 50 (step S4A), and if it is open (step S4A: YES), this “ “Start-up shutter control” is terminated. That is, when the exhaust port shutter 32 operates normally and opens, the control unit 44 ends the control.
In this case, since the exhaust port shutter 32 is operating normally, the control unit 44 starts driving the driven portion K2 by a drive unit K1 other than the exhaust port shutter drive unit 49, and the light source device 51 and the like are relatively driven. The image projection unit 21 with large heat generation is started and the fan is started to perform normal operation. As a result, the user can view the image from the external device 18 with the projector 10.

On the other hand, if it is determined in step S2A that the exhaust port shutter 32 is not closed (step S2A: NO), that is, if the open / close state of the shutter 32 is different from the normal state (that is, abnormal), the control unit 44. Is determined to be abnormal, the exhaust shutter 32 is driven to close, and the shutter closing drive that should have been performed previously is retried (step S5A).
In step S5A, the control unit 44 starts energization of the solenoid 33D with reverse characteristics by setting the -control line LN to the H level by the exhaust port shutter driving unit 49, and starts the recovery operation of the solenoid 33D. Then, after waiting for a predetermined time (200 msec in this configuration), the control unit 44 switches the −control line LN to the L level and stops energization. Here, the waiting time is provided in order to secure a sufficient time for the recovery operation of the solenoid 33D and to obtain a sufficient time for the drive of closing the exhaust port shutter 32.

Subsequently, if the number of retries (the number of retries for shutter closing drive after the start-up shutter control) is started is less than or equal to the specified number (two or less in the present embodiment) (step S6A: NO), The process proceeds to step S2A.
Therefore, if the exhaust port shutter 32 is closed by retry (step S2A: YES), the exhaust port shutter 32 is driven to open (step S3A), and if the exhaust port shutter 32 is opened (step S4A: YES), the exhaust port Since the normal operation of the shutter 32 can be confirmed, it can be determined that the shutter 32 has been restored, and the control unit 44 terminates the control and activates the projector 10 to operate normally.

On the other hand, if the shutter 32 is not closed even after retrying (step S2A: NO), the control unit 44 retries the shutter closing drive again (step S5A).
If the exhaust port shutter 32 is not closed even after retrying in this way, if the number of retries exceeds the specified number (2 times) (step S6A: NO), that is, if the number of retries reaches 3, the exhaust port Since it can be determined that the shutter 32 cannot be closed, the control unit 44 immediately performs error processing (step S8A).

  In this case, the control unit 44 performs the error processing by 1) driving the indicator lamp 36 by the lamp driving unit 47 (in this configuration, blinking red), and notifying the user that the error state is present, 2) Error information indicating that the exhaust shutter 32 is in an error state in which it cannot be closed is written in a flash ROM (not shown) provided outside the storage unit 43 or other than the storage unit 43 and stored as an error history. 3) Cooling fan 31 If the image projection unit 21 including the light source device 51 is driven, the drive is immediately stopped.

  As a result, the user or the like can know that the projector 10 is in an error state, and the maintenance operator or the like can read out the error history from the storage unit 43 or the like during the maintenance, It is possible to confirm whether such an error has occurred, and it is possible to reliably avoid a situation in which each part of the projector 10 is operated while the exhaust port shutter 32 is closed.

  If the projector 10 has a network terminal and is connected to an external device (personal computer) 18 or the like via the network terminal, 4) error information is described as an error message, e-mail or error You may make it perform the notification process which notifies a signal to an external apparatus. In the present embodiment, the case where the “starting shutter control” is performed prior to the starting process of the driven unit K2 has been described. However, the “starting shutter control” is performed in parallel with the starting process of the driven unit K2. May be performed. When performing in parallel, if the exhaust port shutter 32 is abnormal, it is desirable to immediately stop driving the driven portion K2 as an error process.

In addition, even if the exhaust port shutter 32 is closed due to the retry by the shutter closing drive, if the shutter 32 is not opened by the shutter opening drive of step S3A (step S4A: NO), the control unit 44 If the number of shutter opening drive retries (the number of shutter opening drive retries after the start-up shutter control) is started is less than the specified number (two or less in this embodiment) (step S7A: YES), step S3A The process proceeds to retry the shutter open drive.
If the number of times of retry of the shutter opening drive exceeds the specified number (2 times) (step S7A: NO), that is, if the number of retries becomes 3, it is determined that the exhaust port shutter 32 cannot be opened. Therefore, the control unit 44 immediately performs error processing (step S8A).

In this case, the controller 44 performs the error processing of 1) to 4) described above to notify the error and cause the projector 10 to operate without opening the exhaust port shutter 32. Make sure to avoid it.
In the error process in the case where the opening drive cannot be performed, error information indicating an error state in which the exhaust port shutter 32 cannot be opened is left as an error history. Further, the driving of the indicator lamp 36 in this case may be a driving mode different from the driving mode when the closed driving cannot be performed (for example, the blinking interval of red flashing is changed).
In this way, the control unit 44 performs retry control to operate the shutter 32 when the exhaust shutter 32 cannot be driven to be closed or cannot be opened, and performs error processing when it cannot be recovered. After the error processing is performed, when a predetermined time has elapsed, the control unit 44 stops driving the entire projector 10. As a result, it is possible to avoid a situation where the projector 10 is activated in a state where the abnormality of the exhaust port shutter 32 cannot be recovered. The above is “startup shutter control”.

FIG. 8 is a flowchart showing the shutter monitoring process after activation.
When the projector 10 is activated, as shown in FIG. 8, the control unit 44 determines whether or not the exhaust port shutter 32 is open based on the detection signal SK of the open / close detection unit 50 (step S1B). (Step S1B: YES), after waiting for a predetermined waiting time (1 second in the present embodiment) (Step S2B), the process proceeds to Step S1B again to determine whether or not the exhaust port shutter 32 is open. To do. That is, the control unit 44 continuously monitors whether or not the exhaust port shutter 32 is opened at a waiting time interval.

When the control unit 44 detects that the exhaust port shutter 32 is not open (step S1B: NO), the number of detections is set as the number of errors, and the number of errors (the number of errors after starting the “shutter monitoring process”) is defined. It is determined whether the number is less than or equal to the number of times (one or less in the present embodiment) (step S3B).
If it is determined in step S3B that the number is equal to or less than the specified number of times (step S3B: YES), the control unit 44 proceeds to the process of step S2B and exceeds the specified number of times (if the number of errors is two). Then, it is determined that a problem has occurred in the exhaust port shutter 32, error processing is immediately performed, and the operation of each unit of the projector 10 is stopped (step S4B).

  As the error processing, similarly to the error processing in step S8A, 1) notification processing for driving the indicator lamp 36 by the lamp driving unit 47, 2) history processing for leaving error information as an error history, and 3) driving the cooling fan 31 If it does, the process immediately stops driving, and if the image projection unit 21 including the light source device 51 is driven, the process immediately stops driving. 4) If there is a network terminal, the notification process for notifying the external device of error information is performed. Is called. The above is the “shutter monitoring process”.

  For this reason, after the projector 10 is started, if the state where the exhaust port shutter 32 is not opened due to a malfunction exceeds the specified number of times, the user is immediately notified by error processing, and the projector 10 is stopped. Thereby, the shutter abnormality during the normal operation is immediately notified to the user or the like, and an increase in the internal temperature can be avoided.

FIG. 9 is a flowchart illustrating shutter control during operation stop (power-off shutter control).
This control is executed when the “Power” key on the operation unit 38 is operated by the user after the projector 10 is started to turn off the power. The power off is an operation stop state when the user does not use the projector 10, and at least the image projection unit 21 stops driving and the apparatus main body 12 hardly generates heat, and cooling is unnecessary. is there.
The control unit 44 monitors whether or not power-off is instructed (step S1C), and when power-off is instructed (step S1C: YES), the driven unit K2 other than the exhaust port shutter 32 is driven by the driving unit K1. The drive is stopped (step S2C). That is, the driving of the parts related to heat generation and cooling such as the light source device 51 and the cooling fan 31 is stopped.

Then, after the light source device 51 and the cooling fan 31 are stopped, the control unit 44 drives the exhaust port shutter 32 to be closed by the exhaust port shutter driving unit 49 (step S3C), and then the detection signal SK of the open / close detection unit 50. Based on this, it is determined whether or not the exhaust port shutter 32 is closed (step S4C).
Here, if the exhaust port shutter 32 is operating normally, the exhaust port shutter 32 should be closed. If the exhaust port shutter 32 is closed (step S4C: YES), the control unit 44 Then, the apparatus main body 12 is set in the standby state and the control is finished (step S5C).
The standby state is a state in which the apparatus main body 12 can be activated. Specifically, when the “Power” key in the operation unit 38 is operated by the user to instruct power-on, the apparatus body 12 is immediately activated. State. Note that external operations are not accepted until the standby state is entered.

On the other hand, when the exhaust port shutter 32 is not closed (step S4C: NO), the control unit 44 determines that the number of retries for driving the exhaust port shutter 32 to be closed (the number of retries after starting “power-off shutter control”) is equal to or less than the specified number. (2 times or less in this embodiment) is determined (step S6C). If the number is less than the specified number (step S6C: YES), the process proceeds to step S3C, and the closing drive of the exhaust port shutter 32 is retried. Let
If the exhaust port shutter 32 does not close even after retrying in this manner, the controller counts when the number of retries exceeds the specified number (2 times) (step S6C: NO), that is, when the number of retries is three. 44 determines that the exhaust port shutter 32 cannot be closed and performs error processing immediately (step S7C).

As the error processing, similarly to the error processing in steps S8A and S4B, 1) notification processing for driving the indicator lamp 36 by the lamp driving unit 47, 2) history processing for leaving error information as an error history, and 3) network terminal In the case of having, the notification process for notifying the error information to the external device is performed.
Thereby, when the exhaust port shutter 32 is not closed when the driving of the projector 10 is stopped, an abnormality can be notified to the user or the like. Therefore, it is possible to avoid a situation where the projector 10 is left without the user noticing that the exhaust port shutter 32 is not closed.

In addition, when a predetermined time has elapsed after performing this error processing, the control unit 44 stops driving each unit of the projector 10 and then shifts to a standby state (step S5C) and ends the control. Thereby, even when the exhaust port shutter 32 is not closed when the driving of the projector 10 is stopped, the driving of each part can be reliably stopped.
In addition, since the operation shifts to the standby state after the drive is stopped, when the user instructs to turn on the power, the projector 10 starts to be activated, and if the exhaust port shutter 32 operates normally at that time, the user can 10 can be used. The above is the “operation stop shutter control”.
Here, since the above-mentioned “startup shutter control” is executed at the time of start-up, it is possible to reliably avoid a situation in which each part of the projector 10 is operated in a state where the exhaust port shutter 32 does not operate normally at the time of start-up. it can.

As described above, the control unit 44 determines whether or not the exhaust port shutter 32 is closed before starting the driving of the image projection unit 21 when the projector 10 is activated (when the apparatus main body 12 is activated). If not closed, retry control is performed to close the exhaust port shutter 32. If not closed, error processing is performed. If closed, the exhaust port shutter 32 is driven to open. Retry control for opening the mouth shutter 32 is performed, and if it is not opened, error processing is performed.
That is, in this configuration, it is determined whether or not the opening / closing state of the exhaust port shutter 32 is abnormal at the time of activation, and if it is determined to be abnormal, retry control is performed, and error processing is performed if the shutter 32 does not operate normally. The user is notified of shutter failure.
For this reason, it is possible to check the abnormality of the exhaust shutter 32 at the time of startup, and to execute error processing only when the shutter abnormality cannot be recovered even after retrying, and to avoid the situation of executing error processing until it can be recovered. Corresponding processing can be appropriately executed.

As described above, since the dust-proof filter 34 is provided in the air inlet 15 of the projector 10 having this configuration, the dust-proof filter 34 prevents dust and insects from entering the air inlet 15. For this reason, by closing the exhaust port 16 with the exhaust port shutter 32, the vent of the projector 10 is closed, and dust and insects can be reliably prevented from entering the projector 10.
In this configuration, an abnormality that the exhaust port shutter 32 does not close is a situation that should be avoided as a dust-proof shutter, and in this configuration, error processing is performed when this abnormality is not resolved by retrying, and therefore this abnormality is left unattended. It can be avoided.
In addition, in this configuration, if each part operates while the exhaust port shutter 32 is closed, the internal temperature of the apparatus main body 12 becomes high. In this configuration, however, before the driving of the image projection unit 21 is started, a retry is performed. However, when the exhaust port shutter 32 is kept closed, the activation is stopped, so that the situation where the internal temperature becomes high can be reliably avoided.

The control unit 44 determines whether the opening / closing state of the exhaust port shutter 32 is abnormal before starting the driving of the image projection unit 21 and the cooling fan 31 when the apparatus main body 12 is activated. It is possible to determine whether or not there is an abnormality in the shutter before starting the driving of the part related to this, and it is possible to avoid the situation that the internal temperature becomes high due to this, and the fan is driven with the exhaust shutter 32 closed. The situation can be avoided.
Further, the control unit 44 retries control for closing the exhaust port shutter 32 when the exhaust port shutter 32 is not closed at the time of activation, and performs error processing when the exhaust port shutter 32 is not closed even after retrying. It is possible to avoid a situation where an easy state is left unattended.

Further, the control unit 44 performs control to open the exhaust port shutter 32 before starting the driving of the image projection unit 21. If the exhaust port shutter 32 is not opened, the control unit 44 retries the control to open the exhaust port shutter 32 and retry. However, since the error processing is performed when the exhaust port shutter 32 is not opened, the situation where the image projection unit 21 is driven without the exhaust port shutter 32 being opened can be avoided, and the situation where the internal temperature becomes high can be ensured. Can be avoided.
Thus, in this configuration, at the time of start-up, confirmation of the closing operation of the exhaust port shutter 32 and confirmation of the opening operation of the exhaust port shutter 32 are performed, so that both the opening / closing operation of the exhaust port shutter 32 can be confirmed. Is possible.

In addition, in this configuration, after the apparatus main body 12 is activated, it is monitored whether or not the exhaust port shutter 32 is open, and when the exhaust port shutter 32 is not open, a shutter monitoring process (see FIG. 7) that performs error processing is performed. Therefore, it is possible to avoid a situation in which the exhaust port shutter 32 is closed due to some trouble (for example, the influence of an external impact) and the internal temperature is likely to rise after starting.
Further, the exhaust port shutter 32 opens and closes by driving the solenoid 33D, and the exhaust port shutter drive unit 49 energizes the solenoid 33D to drive the exhaust port shutter 32 closed. Thus, the exhaust port shutter 32 can be closed in a short time, and for example, the time required for retry when the operation is stopped can be shortened.
In addition, in this configuration, the biasing member 33S that biases the exhaust port shutter 32 to the closing side is provided, the holding force of the solenoid 33D is released, and the exhaust port shutter 32 is closed by the biasing force of the biasing member 33S. Even if a malfunction occurs in 33D, the exhaust port shutter 32 can be easily closed by the biasing member 33S.

  In this configuration, the control unit 44 performs control to close the exhaust port shutter 32 when the operation of the projector 10 is stopped (when the operation of the apparatus body 12 is stopped), and detects whether the exhaust port shutter 32 is closed, If not closed, the control to close the exhaust port shutter 32 is retried, and if it is not closed even after retrying, error processing is performed, and after the error processing is performed, a transition is made to a standby state that can be started. Checking the abnormality of the exhaust shutter 32, error processing can be executed only when the shutter error cannot be recovered even after retrying, and the situation where error processing is executed until it can be recovered can be avoided. Can be executed.

In addition, in this configuration, the projector 10 can be activated even when an error that the exhaust port shutter 32 is not closed is notified because the standby state is activated after the error processing is performed.
As described above, since the projector 10 of this configuration is a dust-proof projector, it is not desirable to leave a disadvantageous error in terms of dust prevention that the exhaust port shutter 32 does not close when not in use. It does not have any adverse effect on the start-up and operation. With the above configuration, in the present application, the projector 10 can be activated and enabled while reliably informing a user or the like of an error that the exhaust port shutter 32 does not close.

  In this configuration, since “startup shutter control” is performed at the time of startup, it is possible to start and use the projector 10 when an abnormality in the opening / closing state of the exhaust shutter 32 is confirmed and recovered at startup. It becomes possible. Therefore, if the exhaust port shutter 32 operates normally before or when the projector 10 is activated, the projector 10 can be used normally. If the projector 10 does not operate normally even when activated, the projector 10 does not operate normally. The situation where the projector 10 operates in the state can be avoided.

  In addition, when the operation of the projector 10 is stopped, the control unit 44 performs control to close the shutter after stopping the driving of the image projection unit 21 and the cooling fan 31 and detects whether the shutter is closed. The shutter can be closed after the driving of the part related to cooling is stopped, and the situation where the internal temperature becomes high can be reliably avoided.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
For example, in the above-described embodiment, the case where the exhaust port shutter 32 is provided has been described. However, the present invention is not limited thereto, and a shutter may be provided at the intake port 15, or the projection lens 53 may have a lens protection shutter (lens shutter). May be provided. In short, the present invention can be widely applied to the abnormality detection and error processing of the shutter that opens and closes at the time of startup and operation stop.
The projector 10 described above is a type that projects an image on a screen using a transmissive liquid crystal panel 52. However, the projector 10 may be a projector that uses a reflective liquid crystal panel or a digital mirror device. A DMD projector may be used. The projector is not limited to a 3LCD type projector that projects color images by three liquid crystal panels 52, and a projector and a color wheel that project color images by displaying time-division images corresponding to RGB using a single liquid crystal light valve. The present invention can be applied to both the single-plate DMD projector and the 3DMD projector provided. In short, the present invention can be widely applied to a projection display device having a shutter.

  DESCRIPTION OF SYMBOLS 10 ... Projector (projection type display apparatus), 11 ... Housing | casing, 12 ... Apparatus main body, 21 ... Image projection part, 15 ... Intake port (opening part), 16 ... Exhaust port (opening part), 21 ... Image projection part, DESCRIPTION OF SYMBOLS 22 ... Power supply part, 31 ... Cooling fan, 32 ... Exhaust port shutter (shutter), 33D ... Solenoid, 33S ... Energizing member, 34 ... Dust-proof filter, 35 ... Sound output part, 36 ... Indicator lamp (notification part), 37 DESCRIPTION OF SYMBOLS Output terminal 38 ... Operation part 41 ... Signal processing part 42 ... Projection system drive part 43 ... Memory | storage part 44 ... Control part 45 ... Sound drive part 46 ... Fan drive part 47 ... Lamp drive part, 48 ... Terminal drive unit, 49 ... Exhaust port shutter drive unit (shutter drive unit), 52, 52R, 52G, 52B ... Liquid crystal panel, 53 ... Projection lens, K1 ... Drive unit other than exhaust port shutter drive unit, K2 Driven portion other than the exhaust port shutter.

Claims (9)

An apparatus main body including an image projection unit for projecting an image;
A shutter that opens and closes a ventilation opening of the apparatus body;
A shutter drive unit for driving the shutter;
An open / close detector for detecting an open / close state of the shutter;
When starting the apparatus main body, before starting the driving of the image projection unit, it is determined whether or not the shutter open / closed state detected by the open / close detection unit is abnormal. A control unit that controls the shutter to operate by a driving unit; if the shutter does not operate, a control unit that performs error processing;
A projection type display device comprising: The apparatus main body has a fan for ventilating the opening,
The control unit determines whether the opening / closing state of the shutter detected by the opening / closing detection unit is abnormal before starting the driving of the image projection unit and the fan when the apparatus main body is activated. The projection type display device according to claim 1, wherein   3. The control unit according to claim 1, wherein the control unit retries control for closing the shutter when the shutter is not closed, and performs error processing when the shutter is not closed even after retrying. Projection display device.   The control unit performs control to open the shutter before starting the driving of the image projection unit, and if the shutter is not opened, the control to open the shutter is retried, and the shutter is not opened even if the retry is performed. 4. The projection display device according to claim 1, wherein error processing is performed in some cases. 5.   The apparatus main body has an intake port provided with a dustproof filter and an exhaust port that opens without being provided with a dustproof filter and serves as the ventilation opening, and closes the shutter when the apparatus main body is turned off. 5. The projection display device according to claim 1, wherein the device main body is configured to be dust-proof by the dust-proof filter and the shutter that opens and closes the exhaust port. An apparatus main body including an image projection unit for projecting an image, a shutter for opening and closing a ventilation opening included in the apparatus main body, a shutter driving unit for driving the shutter, and an open / close detection unit for detecting an open / closed state of the shutter In a method for controlling a projection display device comprising:
When starting the apparatus main body, before starting the driving of the image projection unit, it is determined whether or not the shutter open / closed state detected by the open / close detection unit is abnormal. A control method for a projection display device, wherein a control for operating the shutter is performed by a driving unit, and error processing is performed if the shutter does not operate.   Determining whether the open / close state of the shutter detected by the open / close detection unit is abnormal before starting the driving of the fan that ventilates the image projection unit and the opening when the apparatus main body is activated; The control method of the projection type display apparatus according to claim 6, wherein the projection type display apparatus is a control method.   The control method for a projection display device according to claim 6 or 7, wherein when the shutter is not closed, the control for closing the shutter is retried, and error processing is performed when the shutter is not closed even after retrying.   Before starting the driving of the image projection unit, control to open the shutter is performed, and if the shutter is not opened, the control to open the shutter is retried. The method of controlling a projection display device according to claim 6, wherein the control method is performed.

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