JP2014238435A - Projector - Google Patents

Abstract

A projector capable of enlarging an intake port, an exhaust port, and a pair of left and right speakers while suppressing the size of the main body is provided. An air inlet 7 and a speaker 41L that can open or close the air inlet 7 are provided on a left surface 2L of a main body 2 of the projector 1. The right surface 2R of the main body 2 includes an exhaust port 8 and a speaker 41R that can open or close the exhaust port 8. [Selection] Figure 1

Description

  The present invention relates to a projector that projects an image.

  2. Description of the Related Art Conventionally, a projector that projects an image on a projection surface such as a screen is integrally provided with an image reproducing means for reproducing image information recorded on a recording medium such as a DVD (Digital Versatile Disc) and a speaker for outputting sound. One is known (Patent Document 1). According to such a projector, it is not necessary to connect an external playback device or the like, and an image and sound based on image information recorded on a recording medium can be easily appreciated.

JP 2005-99617 A

  However, the projector has a projection port for emitting projection light, an air intake and exhaust port for taking in and discharging air for cooling the inside of the projector body, an input terminal for connecting an external image device, a power supply terminal, a DVD, etc. The recording medium insertion port, a pair of left and right speakers, and various operation keys for operating the projector must be disposed on the outer surface of the projector main body. For this reason, the size of the intake port, the exhaust port, and the speaker is limited, and there is a problem that cooling efficiency and volume are limited.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example is a projector having an image projection unit that modulates light emitted from a light source according to image information and projects projection light, and a main body that accommodates the image projection unit. A pair of left and right speakers emitting sound based on sound information input together with the image information, and the inside of the main body are cooled by air taken in from an intake port provided in the main body, and the exhaust port provided in the main body Cooling means for discharging air, wherein the intake port is provided on a first coupling surface of the main body, the exhaust port is provided on a second coupling surface of the main body, and the pair of speakers are respectively In the first coupling surface and the second coupling surface, the intake port and the exhaust port can be closed or opened.

  According to this application example, the pair of left and right speakers respectively close or open the air inlet provided in the first coupling surface of the projector body and the air outlet provided in the second coupling surface. That is, when the projector is not used, the intake and exhaust ports are blocked by the speaker, and when the projector is used, the intake and exhaust ports are opened. This makes it easy to place the projection lens, the image input terminal, the storage medium insertion port, and the like on the other surface of the projector main body while suppressing the size of the projector main body. In addition, since the intake port, the exhaust port, and the pair of left and right speakers can be made larger, it is possible to improve cooling efficiency and output a larger sound. Further, when the projector is not used, the intake port and the exhaust port are blocked by the speaker, so that foreign matter can be prevented from entering the inside of the main body from the intake port and the exhaust port.

  Application Example 2 In the projector according to the application example described above, the projector further includes an open / close detection unit that detects whether the pair of speakers open or close the intake port and the exhaust port, and the projector is turned on. It is preferable that when the pair of speakers detect that both the air inlet and the air outlet are open, the light source is turned on and projection is performed by the image projection means.

  According to this application example, when the projector is turned on, when the pair of left and right speakers open both the air inlet and the air outlet, the light source is turned on to project an image. For this reason, the inside of the projector main body can be reliably cooled.

  Application Example 3 In the projector according to the application example described above, the projector further includes an open / close detection unit that detects whether the pair of speakers open or close the intake port and the exhaust port, and the projector is turned on. It is preferable that when the pair of speakers detect that at least one of the intake port and the exhaust port is blocked, the light source is not turned on and projection by the image projection unit is not performed.

  According to this application example, when the projector is turned on, if either the intake port or the exhaust port is blocked, the light source is not turned on and no image is projected. In addition, it is possible to prevent the light source from being turned on in a state where the exhaust port is blocked and starting projection of an image.

  Application Example 4 In the projector according to the application example described above, in a state where the projector is turned on and the light source is turned off, both the intake port and the exhaust port are opened by the pair of speakers. Preferably, the light source is turned on when projection is detected, and projection by the image projection means is performed.

  According to this application example, when the projector is turned on, either the intake port or the exhaust port is blocked, and the projector is started with the light source not turned on and the image is not projected. By opening both mouths, the light source is turned on and image projection is started. Accordingly, when the power is turned on in a state where the opening of the intake port and the exhaust port is forgotten, by opening both the intake port and the exhaust port, it is possible to turn on the light source and start projecting an image.

  Application Example 5 In the projector according to the application example described above, when the projector detects that at least one of the intake port and the exhaust port is blocked by the pair of speakers while projecting an image. It is preferable that when the closed state continues for a predetermined time, the light source is turned off and projection by the image projection unit is stopped.

  According to this application example, when the intake port and the exhaust port are accidentally blocked by the speaker, it is possible to prompt the opening of the intake port and the exhaust port by notifying. If the closed state continues for a predetermined time, it is possible to turn off the light source and stop projecting an image. As a result, it is possible to prevent the occurrence of a malfunction of the projector due to poor cooling.

  Application Example 6 In the projector according to the application example described above, it is preferable that the projector further includes a connection mechanism that rotatably connects the pair of speakers to the main body.

  According to this application example, the intake port and the exhaust port can be closed or opened by a simple operation of rotating the speaker by the connecting mechanism that rotatably connects the speaker to the main body.

1 is an external perspective view of a projector according to an embodiment. 1 is a block diagram showing a circuit configuration of a projector according to an embodiment. The flowchart which shows operation | movement when a projector powers on. 6 is a flowchart showing an operation when a change in the opening / closing state of the intake port and the exhaust port is detected during operation of the projector. FIG. 14 is an external perspective view of a projector according to Modification Example 1.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the following embodiment does not limit the invention according to the scope of claims, and all combinations of features in the embodiment are based on the invention. It is not always essential to the solution.

(Embodiment)
FIG. 1 is an external perspective view of a projector 1 according to the present embodiment. FIG. 1A shows a state in which a speaker 41 is mounted on a main body 2 of the projector 1 and both an intake port 7 and an exhaust port 8 are closed. The figure seen from diagonally back, the figure (b) is the figure which looked at the state where the speaker 41 was removed from the main body 2 of the projector 1, and the inlet port 7 and the exhaust port 8 were opened from the diagonally rear side, figure (c). These are the figures which looked at the main body 2 of the projector 1 from diagonally forward. In the present embodiment, the description will be made assuming that the direction in which an image is projected is the front.

As shown in FIG. 1, the projector 1 according to the present embodiment is configured by a main body 2 and speakers 41 (41L, 41R) in appearance.
The left surface 2L of the main body 2 of the projector 1 is provided with an air inlet 7 and a left speaker 41L that can be opened or closed by being attached or detached. An intake fan 46 (not shown) is provided inside the intake port 7 inside the main body 2. The left surface 2L corresponds to the first coupling surface.

  The right surface 2 </ b> R of the main body 2 is provided with an exhaust port 8 and a right speaker 41 </ b> R that can be opened or closed by detachment. An exhaust fan 47 (not shown) is provided inside the exhaust port 8 inside the main body 2. The right surface 2R corresponds to a second coupling surface. Further, the left speaker 41L and the right speaker 41R constitute a pair of speakers 41.

In addition, the left surface 2L and the right surface 2R are provided with an open / close detection means 42 for detecting whether the intake port 7 and the exhaust port 8 are open or closed.
Further, the upper surface 2T of the main body 2 is provided with an input operation means 23 configured by a plurality of operation keys for giving various instructions to the projector 1, and an informing means 43 for informing the operation state of the projector 1.

An input terminal 6 and a disk slot 3 for inserting the DVD medium M are provided on the rear surface 2S of the main body 2.
Further, a projection lens 13 that projects an image on an external screen SC (see FIG. 2) or the like is exposed on the front surface 2F of the main body 2.

  The intake port 7, the exhaust port 8, the intake fan 46, and the exhaust fan 47 constitute a cooling unit. The cooling means takes air into the main body 2 from the air inlet 7 by the air intake fan 46, and causes the air heated by cooling the inside of the main body 2 to be exhausted from the air outlet 8 by the exhaust fan 47.

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 main body 2 includes an input terminal 6, an image projection unit 10, an OSD processing unit 16, an image signal processing unit 17, a signal input unit 18, a control unit 20, a storage unit 21, a light source control unit 22, and an input. The operation unit 23, the power supply terminal 30, the power supply unit 31, the audio signal processing unit 40, the open / close detection unit 42, the notification unit 43, the cooling control unit 45, the DVD playback unit 50, etc. It is arranged on the outer surface.

  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 projection means 10 modulates the light emitted from the light source 11 by the liquid crystal light valves 12R, 12G, and 12B, and projects the modulated image from the projection lens 13 to project the projected image on the projection surface such as the screen SC. indicate.

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 corresponding liquid crystal light valves 12R, 12G, 12B.

  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. In the liquid crystal light valves 12R, 12G, and 12B, a plurality of pixels (not shown) arranged in a matrix are formed, 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 input image data to each pixel, each pixel is set to a light transmittance corresponding to the image data. Therefore, the light emitted from the light source 11 is modulated by transmitting through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to the image data is formed for each color light.
The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become 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 is exemplified, but the present invention can also be applied to a projector that projects using an LED (Light Emitting Diode) light source or a laser light source as the light source.

  In the present embodiment, the image projection means 10 is exemplified by a transmissive liquid crystal type projection optical system using three liquid crystal light valves 12R, 12G, and 12B, but a reflective liquid crystal display method or a micromirror device method ( A light modulation device of another display method such as a light switch display method may be employed.

  The control means 20 includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory) used for temporary storage of various data, and the like, according to a control program (not shown) stored in the storage means 21. By operating, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21. The control means 20 includes a timer (not shown) that measures time.

  The storage means 21 is composed of a rewritable nonvolatile memory such as a flash memory or FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various setting data for defining operation conditions of the projector 1, and the like.

  The input operation means 23 includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the input operation means 23 include a power key for switching on / off alternately, a playback key for starting playback of the DVD media M, and a stop for stopping playback of the DVD media M. A key, an eject key for removing the DVD medium M from the projector 1, an input switching key for switching the input source of the image signal from the plurality of input terminals 6 and the DVD medium M, and a setting menu for performing various settings are displayed in a superimposed manner. A menu key to be selected, a cursor key for the user to select a setting item from the menu, a determination key for determining various settings, an escape key for returning the screen being set, and the like.

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

  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 on and off the light source 11.

  The signal input means 18 receives image signals (also referred to as image information) and audio from a plurality of input terminals 6 from an external image output device such as a video reproduction device or a personal computer via a cable (not shown) or a communication device. A signal (also referred to as audio information) is input. Also, image information and audio information are input from the DVD playback means 50. The input image signal and audio signal are output to the image signal processing unit 17 and the audio signal processing unit 40 based on an instruction from the control unit 20.

  When the user operates the input switching key of the input operation means 23 and designates desired image information of the input terminal 6 or image information of the DVD medium M, the control means 20 uses the designated image information and audio information as the image signal processing means. 17 and the audio signal processing means 40 are instructed to the signal input means 18. Note that the signal input unit 18 may include a receiving unit for wireless communication, optical communication, and the like, and may be configured to input a signal wirelessly from an external device.

The DVD reproducing means 50 reproduces image information and audio information recorded on the DVD medium M.
The DVD playback means 50 includes an insertion sensor 51, a media transport means 52, a mounting sensor 53, a data reading means 54, a data processing means 55, and the like.

  The insertion sensor 51 is disposed in the vicinity of the disk slot 3 (see FIG. 1), detects that a part of the DVD medium M has been inserted into the disk slot 3, and notifies the control means 20 of it.

  The media transport means 52 is composed of a transport roller for transporting the DVD medium M, a drive motor (none of which is shown) that drives the transport roller to rotate, and the DVD playback means based on instructions from the control means 20 50 carries the DVD medium M.

  Specifically, when the user inserts a part of the DVD medium M into the disk slot 3 and the insertion sensor 51 detects this insertion, the control means 20 instructs the media transport means 52 to insert the DVD medium M. It is pulled into the interior and mounted on a turntable (not shown). When the user operates the eject key of the input operation means 23, the control means 20 instructs the media transport means 52 to detach the DVD medium M from the turntable and remove the DVD media M from the disk slot 3. Let it drain.

  The mounting sensor 53 is arranged in the vicinity of the turntable, detects that the DVD medium M is mounted on the turntable, and notifies the control means 20.

  Based on an instruction from the control means 20, the data reading means 54 rotates the DVD medium M mounted on the turntable by a spindle motor (not shown) and scans an optical pickup (not shown). The data stream recorded on the DVD medium M is sequentially read. This data stream is information in which encoded image information and audio information are multiplexed, and the data stream read by the data reading unit 54 is sequentially output to the data processing unit 55.

  The data processing unit 55 includes a demultiplexer, a decoder, and the like. Based on an instruction from the control unit 20, the data processing unit 55 separates the data stream input from the data reading unit 54 into image information and audio information. A process of decoding (decoding) image information and audio information is performed.

  The data processing unit 55 outputs the decoded image information and audio information to the signal input unit 18. In this specification, the DVD reproduction means 50 reads a data stream from the DVD medium M and outputs image information and audio information based on the data stream. It is written as “Yes”.

  When receiving the operation of the reproduction key of the input operation unit 23, the control unit 20 instructs the DVD reproduction unit 50 to start reproduction of the image information, and when receiving the operation of the stop key of the input operation unit 23, The reproduction unit 50 is instructed to stop the reproduction of the image information.

  The insertion sensor 51 and the mounting sensor 53 can be configured using various detection means such as a mechanical switch, an optical sensor, and a magnetic sensor, for example. The mounting sensor 53 may be configured to detect whether or not the DVD medium M is mounted based on the signal level of the reflected light received by the optical pickup described above.

  The image signal processing unit 17 converts the image signal input from the signal input unit 18 into image data representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B based on an instruction from the control unit 20. Here, the converted image information is classified into red (R), green (G), and blue (B) color lights, and a plurality of pixels corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. Consists of values. The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted is defined by this pixel value.

  The OSD processing unit 16 performs processing for superimposing and displaying an OSD (on-screen display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing unit 16 includes an OSD memory (not shown) and stores OSD image data representing graphics, fonts, and the like for forming an OSD image.

When the control means 20 instructs to superimpose the OSD image, the OSD processing means 16 reads the necessary OSD image data 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 data is synthesized with the image data input from the processing means 17. The image data combined with the OSD image data 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 16 outputs the image data input from the image signal processing unit 17 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 according to the image data input from the OSD processing unit 16, an image corresponding to the image data is projected from the projection lens 13 and projected onto the projection surface of the screen SC. An image is displayed.

  The audio signal processing unit 40 amplifies the audio information input from the signal input unit 18 based on an instruction from the control unit 20 and outputs the amplified audio information to the speaker 41.

  The speaker 41 includes a pair of left and right speakers 41L and 41R, and outputs the audio information input from the audio signal processing means 40 as audible information that can be heard by the user. An audio signal is input from the audio signal processing means 40 to the speaker 41 by a wired cable or wirelessly.

  The open / close detection means 42 includes a mechanical switch (not shown) or a photo sensor, and detects whether the speakers 41L and 41R are mounted on the main body 2 and the intake port 7 and the exhaust port 8 are closed or opened. The control unit 20 is notified of the result.

  The notification unit 43 includes an LED, a buzzer, and the like, and reports various operation states of the projector 1 based on instructions from the control unit 20. In this embodiment, the notification means 43 notifies the state where at least one of the intake port 7 and the exhaust port 8 is closed.

  The cooling control unit 45 controls the rotation of the intake fan 46 and the exhaust fan 47 based on an instruction from the control unit 20 to cool the inside of the main body 2. When the speakers 41L and 41R are both removed from the main body 2 and the intake port 7 and the exhaust port 8 are opened, the control means 20 turns on the light source 11 and operates the intake fan 46 and the exhaust fan 47 to generate an image. Project. When at least one of the speakers 41L and 41R is attached to the main body 2 and at least one of the intake port 7 and the exhaust port 8 is closed, the light source 11 is turned off and the operation of the intake fan 46 and the exhaust fan 47 is performed. Stop and stop projecting images.

  The power supply unit 31 is supplied with electric power such as AC 100V from the outside via the power supply terminal 30. The power supply unit 31 converts input power (AC power) into predetermined DC power and supplies the power to each unit of the projector 1. In addition, the power supply unit 31 stops supplying power (operating power) necessary for image projection to each unit (power-on state) and operating power supply 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. FIG. 3 is a flowchart showing an operation when the projector 1 is turned on, and FIG. 4 is a flowchart showing an operation when the open / close detection means 42 detects a change in the open / close state of the intake port 7 and the exhaust port 8 while the projector 1 is operating. .

[When the projector is turned on]
As shown in FIG. 3, when the projector 1 accepts a power-on operation using the power key of the input operation means 23 (step S101), the control means 20 activates each part other than the image projection system of the projector 1 (main body activation). (Step S102), the process proceeds to Step S103.

  In step S <b> 103, the control unit 20 checks whether both the intake port 7 and the exhaust port 8 are open based on the detection result of the open / close detection unit 42. When both the intake port 7 and the exhaust port 8 are open (step S103: Y), the process proceeds to step S104. When at least one of the intake port 7 and the exhaust port 8 is closed (step S103: N), the process proceeds to step S105.

  In step S104, the control means 20 turns on the light source 11 by the light source control means 22, and the process proceeds to step S106.

  In step S105, the control unit 20 causes the notification unit 43 to notify that at least one of the intake port 7 and the exhaust port 8 is closed, and the process proceeds to step S108.

  In step S106, the control unit 20 instructs the cooling control unit 45 to rotate the intake fan 46 and the exhaust fan 47 to start the cooling operation. Next, the process proceeds to step S107.

  In step S107, the control unit 20 causes the image projection unit 10 to start projecting an image, and the process proceeds to step S108.

  In step S108, the operation flow ends.

  In step S102 described above, sound may be output from the speaker 41. That is, when either the intake port 7 or the exhaust port 8 is closed, it is possible to output only audio without projecting an image.

(When a change in the open / close state of the intake and exhaust ports is detected)
As shown in FIG. 4, when the opening / closing detection means 42 detects a change in the opening / closing state of the intake port 7 and the exhaust port 8 while the projector 1 is in operation (step S201), the process proceeds to step S202.

  In step S202, the control unit 20 checks whether both the intake port 7 and the exhaust port 8 are open based on the detection result of the open / close detection unit 42. When both the intake port 7 and the exhaust port 8 are open (step S202: Y), the process proceeds to step S203. When at least one of the intake port 7 and the exhaust port 8 is closed (step S202: N), the process proceeds to step S210.

  In step S203, the control means 20 checks whether or not the light source 11 is turned off. When the light source 11 is turned off (step S203: Y), the process proceeds to step S204. When the light source 11 is turned on (step S203: N), the process proceeds to step S206.

  In step S204, the control means 20 turns on the light source 11 by the light source control means 22, and the process proceeds to step S205.

  In step S205, the control unit 20 instructs the cooling control unit 45 to rotate the intake fan 46 and the exhaust fan 47 to start the cooling operation. Next, the process proceeds to step S206.

  In step S206, the control unit 20 causes the image projection unit 10 to project an image, and the process proceeds to step S218.

  In step S210, the control means 20 checks whether or not the light source 11 is turned on. When the light source 11 is turned on (step S210: Y), the process proceeds to step S211. When the light source 11 is turned off (step S210: N), the process proceeds to step S218.

  In step S211, the control means 20 notifies the notification means 43 that at least one of the intake port 7 and the exhaust port 8 is closed, and proceeds to step S212.

  In step S212, the control means 20 starts measuring time with a timer, and transitions to step S213.

  In step S213, the control unit 20 checks whether or not both the intake port 7 and the exhaust port 8 are open based on the detection result of the open / close detection unit 42. When both the intake port 7 and the exhaust port 8 are open (step S213: Y), the process proceeds to step S215. When at least one of the intake port 7 and the exhaust port 8 is closed (step S213: N), the process proceeds to step S214.

  In step S214, the control means 20 checks whether or not the timer has passed a predetermined time T1 (for example, 5 seconds). When the timer has passed the predetermined time T1 (step S214: Y), the process proceeds to step S216. When the predetermined time T1 has not elapsed (step S214: N), the process proceeds to step S213.

  In step S215, the control means 20 ends the notification by the notification means 43, and transitions to step S218.

  In step S216, the control unit 20 causes the light source control unit 22 to turn off the light source 11, and the process proceeds to step S217.

  In step S217, the control unit 20 instructs the cooling control unit 45 to stop the rotation of the intake fan 46 and the exhaust fan 47, and stops the cooling operation. Next, the process proceeds to step S218.

  In step S218, the operation flow ends.

According to the embodiment described above, the following effects can be obtained.
According to the projector 1 of the present embodiment, the pair of left and right speakers 41 includes the air inlet 7 provided on the first coupling surface (left surface 2L) and the second coupling surface (right surface 2R) of the main body 2 of the projector 1. ) Are closed or opened. That is, when the projector 1 is not used, the intake port 7 and the exhaust port 8 are closed by the speaker 41, and when the projector 1 is used, the intake port 7 and the exhaust port 8 are opened. In other words, while suppressing the size of the main body 2 of the projector 1, the projection lens 13, the input terminal 6, the storage medium insertion port, and the like can be easily arranged on the other surface of the main body 2, and the intake port 7, the exhaust port 8, Since the pair of left and right speakers 41 can be made larger, the cooling efficiency can be improved and a larger sound can be output. Further, when the projector 1 is not used, the intake port 7 and the exhaust port 8 are closed by the speaker 41, so that foreign matter can be prevented from entering the inside of the main body 2 from the intake port 7 and the exhaust port 8.

  Further, when the projector 1 is turned on, when the pair of left and right speakers 41 opens both the air inlet 7 and the air outlet 8, the light source 11 is turned on to project an image. For this reason, the inside of the main body 2 of the projector 1 can be reliably cooled. If either the air inlet 7 or the air outlet 8 is closed, the light source 11 is not turned on and no image is projected, so the air inlet 7 and the air outlet 8 for cooling the inside of the projector 1 are closed. In this state, it is possible to prevent the light source 11 from turning on and starting image projection.

  In addition, when the projector 1 is turned on, either the air inlet 7 or the air outlet 8 is closed, and the projector 1 is started in a state where the light source 11 is not turned on and the image is not projected. 8 is opened, the light source 11 is turned on and image projection is started. Accordingly, when the power is turned on in a state where the intake port 7 and the exhaust port 8 are forgotten to be opened, both the intake port 7 and the exhaust port 8 are opened to turn on the light source 11 and start projecting an image. Is possible.

  Further, when the intake port 7 or the exhaust port 8 is blocked by the speaker 41 by mistake, it is possible to prompt the opening of the intake port 7 and the exhaust port 8 by notifying. If the closed state continues for a predetermined time, the light source 11 can be turned off and the image projection can be stopped. Thereby, it is possible to prevent the occurrence of the malfunction of the projector 1 due to the cooling failure.

  Further, when it is desired to stop the image projection, the light source 11 can be turned off and the image projection can be stopped by closing at least one of the air inlet 7 and the air outlet 8 with the speaker 41.

Moreover, you may change the said embodiment as follows.
(Modification 1)
In the embodiment described above, the speaker 41 is detachably installed from the main body 2. However, the speaker 41 may be installed via a connection mechanism that is rotatably connected to the main body 2.

  FIG. 5 is an external perspective view of the projector 1 according to the first modification. FIG. 5A shows a state where the speaker 41 of the projector 1 is rotated and the intake port 7 and the exhaust port 8 are closed obliquely rearward. FIG. 5B is a view of the projector 41 in a state in which the speaker 41 of the projector 1 is rotated and the intake port 7 and the exhaust port 8 are opened from an oblique rear side, and FIG. 6 is a view of the state in which the speaker 41 is rotated and the intake port 7 and the exhaust port 8 are opened as viewed obliquely from the front.

  As shown in FIG. 5, the left surface 2 </ b> L of the main body 2 of the projector 1 is provided with an air inlet 7 and a left speaker 41 </ b> L that can be opened or closed by rotating. Further, the right surface 2R includes an exhaust port 8 and a right speaker 41R that can be opened or closed by rotating. Each speaker 41 is rotatably connected to the main body 2 by a connecting mechanism 41P.

  According to the first modification, the intake port 7 and the exhaust port 8 can be opened or closed by a simple operation of rotating the speaker 41.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Main body, 2L ... Left side (1st coupling surface), 2R ... Right side (2nd coupling surface), 3 ... Disk slot, 6 ... Input terminal, 7 ... Intake port, 8 ... Exhaust port, DESCRIPTION OF SYMBOLS 10 ... Image projection means, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve, 13 ... Projection lens, 14 ... Liquid crystal drive means, 16 ... OSD processing means, 17 ... Image signal processing means, 18 ... Signal input means, DESCRIPTION OF SYMBOLS 20 ... Control means, 21 ... Memory | storage means, 22 ... Light source control means, 23 ... Input operation means, 30 ... Power supply terminal, 31 ... Power supply part, 40 ... Audio | voice signal processing means, 41 ... Speaker, 41L ... Left speaker, 41R ... right speaker, 41P ... coupling mechanism, 42 ... open / close detection means, 43 ... notification means, 45 ... cooling control means, 46 ... intake fan, 47 ... exhaust fan, 50 ... DVD playback means, 51 ... insertion sensor 52 ... medium conveying means 53 ... attachment sensor, 54 ... data reading means 55 ... data processing unit, SC ... screen.

Claims (6)

A projector having an image projection unit that modulates light emitted from a light source according to image information and projects projection light, and a main body that accommodates the image projection unit;
A pair of left and right speakers emitting sound based on sound information input together with the image information;
Cooling means for cooling the inside of the main body with air taken in from an intake port provided in the main body, and discharging the air from an exhaust port provided in the main body,
The intake port is provided in a first coupling surface of the body, and the exhaust port is provided in a second coupling surface of the body;
The pair of speakers is provided with a projector capable of closing or opening the intake port and the exhaust port on the first coupling surface and the second coupling surface, respectively. The projector according to claim 1.
An opening / closing detection means for detecting whether the pair of speakers opens or closes the intake port and the exhaust port;
When the projector is turned on, the light source is turned on when the pair of speakers detects that both the air inlet and the air outlet are open, and projection is performed by the image projection unit. Projector. The projector according to claim 1.
An opening / closing detection means for detecting whether the pair of speakers opens or closes the intake port and the exhaust port;
When the projector is turned on, when it is detected that at least one of the intake port and the exhaust port is blocked by the pair of speakers, the light source is not turned on and projection by the image projection unit is performed. A projector characterized by not performing it. The projector according to claim 3.
When the projector is turned on and the light source is turned off, the light source is turned on when the pair of speakers detects that both the air inlet and the air outlet are opened, and the image projection is performed. A projector characterized by performing projection by means. The projector according to claim 2,
When the projector detects that at least one of the air inlet and the air outlet is blocked by the pair of speakers while projecting an image, and when the closed state continues for a predetermined time A projector characterized in that the light source is turned off and projection by the image projection means is stopped. The projector according to any one of claims 1 to 5,
Furthermore, the projector provided with the connection mechanism which connects the said pair of speaker with respect to the said main body so that rotation is possible.

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