JP2011107368A - Projection type display device and cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection type display device can ease viewer's unpleasant feeling to exhaust air. <P>SOLUTION: The projection type display device includes an exhaust fan 140 driven to cool a heat generating component in a cabinet 110, and a cleaning device 200 detachably attached to the cabinet 110 and emitting electrolytic mist having cleaning action. The cleaning device 200 is attached to a projector body 100 so that the mist emitted from the cleaning device 200 may be diffused by air exhausted from the exhaust port 111 of the cabinet 110 by the exhaust fan 140. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projection display device that modulates light from a light source and projects the light onto a projection surface, and a cleaning device suitable for use with the projection display device.

  In general, in a projection display device (hereinafter referred to as “projector”), a light source such as a lamp and a light modulation element such as a liquid crystal panel generate a large amount of heat during projection. For this reason, such a projector is provided with a cooling device for cooling these heat generating components. The cooling device includes an intake fan, supplies outside air to the heat generating portion by the intake fan, and cools the heat generating components.

  In addition, the projector is provided with an exhaust fan. The air heated by cooling the heat-generating component is discharged to the outside by an exhaust fan (for example, see Patent Document 1).

JP 2008-102375 A

  By the way, in home use or mobile type projectors, projection is often performed in a relatively small space such as a living room or a conference room. In such a case, since the viewer views from a position relatively close to the projector, the viewer may feel uncomfortable with the exhaust from the projector due to odor caused by cooling of the heat generating components.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a projection display device and a cleaning device that can alleviate the discomfort of the viewer to the exhaust.

  A projection display device according to a first aspect of the present invention is a fan for cooling a heat generating component disposed in an apparatus main body, and is detachably attached to the apparatus main body, and discharges a mist having a cleaning action. And a cleaning device. Here, the cleaning device is attached to the device main body so that the mist discharged from the cleaning device is diffused by the air generated by the fan and discharged from the device main body.

  According to the configuration of the present invention, the exhaust discharged from the apparatus main body after cooling the heat-generating component can be cleaned by the mist discharged from the cleaning apparatus, so that the viewer's discomfort with respect to the exhaust can be reduced. Further, since the mist is diffused by the air exhausted from the fan, it can be avoided that the mist enters the viewer's field of view and hinders viewing.

  Further, it is not necessary to provide a fan for diffusing mist in the cleaning device, and the cleaning device can be simplified.

  In the projection display device of the present invention, the fan may be configured to include an exhaust fan that discharges air that has been heated by cooling the heat-generating component from the apparatus main body.

  With such a configuration, the exhaust gas emitted from the apparatus main body after cooling the heat-generating component is used for mist diffusion, so that the exhaust gas can be brought into contact with the mist before spreading widely in the external space. Efficiency can be increased.

  In the projection display device of the present invention, the fan may include an intake fan that takes in outside air and supplies the air to the heat generating component. In this case, the apparatus main body is provided with a duct for directing a part of the air from the intake fan to the cleaning apparatus.

  With such a configuration, the mist can be diffused by air having a low temperature, so that a reduction in the cleaning effect due to the evaporation of the mist can be suppressed.

  In the projection display device according to the aspect of the invention, the cleaning device includes a tank that stores a cleaning liquid, a mist generation unit that generates the mist from the liquid, and a control unit that drives and controls the mist generation unit. And an exhaust detection unit that detects exhaust from the apparatus main body to the cleaning apparatus. In this case, the control unit stops the mist generating unit when there is no exhaust to the cleaning device.

  With such a configuration, it is possible to prevent the mist discharged from the cleaning device from entering the inside of the device main body.

  In the projection display device of the present invention, the cleaning device may be configured to include a liquid amount detection unit for detecting the amount of liquid in the tank. In this case, the control unit outputs liquid amount shortage information to the apparatus main body when the liquid amount is smaller than a predetermined amount. On the other hand, the apparatus main body may be configured to include a notification control unit. When the liquid amount shortage information is input, the notification control unit notifies the liquid level shortage of the cleaning device.

  With such a configuration, it is possible to notify the user that the amount of liquid in the tank of the cleaning device is insufficient.

  In the projection display device according to the aspect of the invention, the cleaning device may be configured to include an electrolysis unit that electrolyzes the electrolyte to be stored in the tank.

  With such a configuration, the exhaust air and the air in the space where the projection display device is installed can be cleaned using the electrolytic solution generated by electrolysis.

  A cleaning device according to a second aspect of the present invention includes a tank for storing a liquid having a cleaning action, a mist generating unit for generating mist from the liquid, a control unit for driving and controlling the mist generating unit, A wind detection unit that detects air blowing to the cleaning device. Here, the control unit stops the mist generating unit when the air flow is smaller than a predetermined amount.

  According to the configuration of the present invention, by disposing the cleaning device in the vicinity of the exhaust port of the projection display device, it is possible to clean the exhaust gas emitted from the projection display device after cooling the heat-generating parts, so that the viewer feels uncomfortable with exhaust. Can be relieved.

  In addition, since mist is not generated unless the projection display device is exhausted, it is possible to prevent the mist released from the cleaning device from entering the projection display device.

  As described above, according to the present invention, it is possible to provide a projection display device and a cleaning device that can alleviate the viewer's discomfort with respect to exhaust.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

It is a perspective view which shows the state before a cleaning apparatus is attached to the projector main body which concerns on embodiment. It is a perspective view which shows the state by which the cleaning apparatus was attached to the projector main body which concerns on embodiment. It is a figure which shows the structure of the optical engine which concerns on embodiment. It is a block diagram which shows the structure of the projector main body which concerns on embodiment. It is a figure which shows the structure for attaching the cleaning apparatus which concerns on embodiment to a projector main body. It is a figure which shows the structure of the cleaning apparatus which concerns on embodiment. It is a figure for demonstrating the structure of the drive control part which concerns on embodiment. It is a figure which shows the processing flow of the cleaning operation by the cleaning apparatus which concerns on embodiment, and the processing flow of the drought display by a projector main body. It is a perspective view which shows the state before a cleaning apparatus is attached to the projector main body which concerns on the example of a change. It is a perspective view which shows the state by which the cleaning apparatus was attached to the projector main body which concerns on the example of a change. It is the internal perspective figure seen from the upper direction and the back of the projector which concerns on the example of a change.

  Hereinafter, a projector according to an embodiment will be described with reference to the drawings.

  1 and 2 are perspective views showing the configuration of the projector. FIG. 1 is a perspective view showing a state before the cleaning device 200 is attached to the projector main body 100, and FIG. 2 is a perspective view showing a state where the cleaning device 200 is attached to the projector main body 100.

  Referring to these drawings, the projector includes a projector main body 100, a cleaning device 200 that is detachably attached to the projector main body 100, and a USB cable 300 that relays between the projector main body 100 and the cleaning device 200. Yes.

  The projector main body 100 includes a cabinet 110 having a horizontally long and substantially rectangular parallelepiped shape. An exhaust port 111 is formed on the right side surface of the cabinet 110. Further, on the right side surface of the cabinet 110, engagement pieces 112 are formed at two positions on the front and rear sides of the lower end portion.

  An optical engine 120, a projection lens 130, and an exhaust fan 140 are disposed inside the cabinet 110. The optical engine 120 generates video light modulated by the video signal. A projection lens 130 is attached to the optical engine 120, and a front end portion of the projection lens 130 is exposed forward from the front surface of the cabinet 110. The projection lens 130 enlarges and projects the image light generated by the optical engine 120 onto a screen arranged in front of the projector.

  The exhaust fan 140 is disposed such that its exhaust surface faces the exhaust port 111. The exhaust fan 140 is sucked into the cabinet 110 by an intake fan (described later), and air heated by cooling heat-generating components such as a lamp (described later) and a liquid crystal panel (described later) is supplied to the outside through the exhaust port 111. To discharge.

  FIG. 3 is a diagram illustrating the configuration of the optical engine 120.

  As shown in the figure, the optical engine 120 includes a lamp 121, a light guide optical system 122, three transmissive liquid crystal panels 123, 124, and 125, and a dichroic prism 126. In addition, polarizing plates (not shown) are arranged on the incident side and the emission side of the liquid crystal panels 123, 124, and 125.

  The lamp 121 is, for example, a metal halide lamp or a xenon lamp. White light emitted from the lamp 121 is converted into light in the red wavelength band (hereinafter referred to as “R light”), light in the green wavelength band (hereinafter referred to as “G light”), and blue wavelength by the light guide optical system 122. The light is separated into band light (hereinafter referred to as “B light”) and applied to the liquid crystal panels 123, 124 and 125. The R light, G light, and B light modulated by the liquid crystal panels 123, 124, and 125 are color-combined by the dichroic prism 126 and emitted as video light.

  In addition to the transmissive liquid crystal panels 123, 124, and 125, a reflective liquid crystal panel or a MEMS device can be used as the light modulation element that constitutes the optical engine 120. In addition, the optical engine 120 is not a three-plate optical system including three light modulation elements as described above, but may be configured by, for example, a single-plate optical system using one light modulation element and a color wheel. it can.

  FIG. 4 is a block diagram showing the configuration of the projector main body 100.

  In addition to the exhaust fan 140, the projector main body 100 is provided with an intake fan 150. The intake fan 150 takes in outside air and supplies it to heat-generating components such as the lamp 121 and the liquid crystal panels 123, 124, 125, and cools them. The intake port of the intake fan 150 is disposed on the bottom surface of the projector main body 100.

  The projector main body 100 controls the drive of the lamp 121 and the liquid crystal panels 123, 124, 125, etc., so that the control unit 160, the storage unit 161, the operation input unit 162, the remote control receiving unit 163, the USB interface 164, the video signal processing unit 165, A panel drive unit 166, a fan drive unit 167, a lamp drive unit 168, and a power supply unit 169 are provided.

  The operation input unit 162 outputs an input signal corresponding to a button operation of an operation unit (not shown) to the control unit 160. Remote control receiving unit 163 outputs an input signal corresponding to a button operation of a remote control (not shown) to control unit 160.

  The USB interface 164 includes a USB connector 164a and a USB host 164b. When the cleaning device 200 is attached to the projector main body 100, the host-side USB terminal 301 of the USB cable 300 is connected to the USB connector 164a. The USB host 164b performs data communication based on the USB standard with a USB device (described later) provided in the cleaning device 200.

  The video signal processing unit 165 converts an externally input video signal into an RGB video signal that can be displayed on the liquid crystal panels 123, 124, and 125, and outputs the RGB video signal to the panel driving unit 166. The panel drive unit 166 drives the liquid crystal panels 123, 124, and 125 in accordance with the video signal input from the video signal processing unit 165 and the control signal from the control unit 160.

  The fan driving unit 167 drives the exhaust fan 140 and the intake fan 150 in accordance with a control signal from the control unit 160. The lamp driving unit 168 drives the lamp 121 according to a control signal from the control unit 160.

  The storage unit 161 includes a RAM, a ROM, and the like. The storage unit 161 stores a control program for giving the control unit 160 a control function. The control unit 160 includes a CPU and controls each unit according to the control program.

  The power supply unit 169 supplies power to each unit of the projector main body 100, such as the control unit 160, as indicated by a broken line in the figure. Further, the power supply unit 169 supplies a predetermined DC voltage (for example, DC 5V) to the cleaning device 200 via the USB interface 164.

  Returning to FIG. 1 and FIG. 2, the cleaning device 200 includes a cabinet 210. A discharge port 211 is formed substantially at the center of the upper surface of the cabinet 210.

  FIG. 5 is a diagram showing a structure for attaching the cleaning device 200 to the projector main body 100. 5A is a diagram showing a surface (left side surface in FIG. 1) attached to the projector main body 100 in the cleaning device 200, and FIG. 5B shows a bottom surface portion on the left side surface side of the cleaning device 200. FIG. FIG. 5C is a cross-sectional view taken along line BB ′ of FIG. 5A in a state where the cleaning device 200 is attached to the projector main body 100.

  As shown in FIGS. 5A and 5B, the cabinet 210 has two engagement holes 212 corresponding to the engagement pieces 112 of the projector main body 100 from the left side surface to the bottom surface. . When the cleaning device 200 is attached to the projector main body 100, the engagement piece 112 is fitted into the engagement hole 212 from the bottom surface side of the cabinet 210, and is engaged with the engagement hole 212 as shown in FIG. .

  In this way, as shown in FIG. 2, the cleaning device 200 is attached to the right side surface of the projector main body 100 (cabinet 110).

  Inside the cleaning device 200, electrolyzed water having a sterilizing action is generated by electrolytic decomposition, and the electrolyzed water is converted into mist (hereinafter referred to as “electrolytic mist”) and discharged from the discharge port 211. On the other hand, air that has been heated by cooling heat-generating components such as the lamp 121 and the liquid crystal panels 123, 124, and 125 is discharged from the exhaust port 111 of the projector main body 100 by the exhaust fan 140. The exhaust from the exhaust port 111 diffuses the electrolytic mist discharged from the discharge port 211.

  At this time, when the exhaust gas from the exhaust port 111 reaches the electrolytic mist, the temperature of the exhaust gas is sufficiently lowered (for example, 50 ° C. or less) between the exhaust port 111 and the discharge port 211. A predetermined distance D (for example, 3 to 5 cm) is provided. Thereby, it is possible to prevent the electrolytic mist from evaporating due to contact with the high-temperature exhaust gas (70 to 80 ° C.) immediately after the discharge, and the cleaning effect is lowered.

  Hereinafter, the configuration of the cleaning device 200 will be described in detail.

  FIG. 6 is a diagram illustrating a configuration of the cleaning device 200. FIG. 6A is a cross-sectional view taken along the line AA ′ of FIG. 6B and 6C are a longitudinal sectional view and a top view, respectively, showing the configuration of the ultrasonic vibration unit 242.

  The cleaning device 200 includes a tank 220, an electrolysis unit 230, a mist generation unit 240, a water amount sensor 250, an air volume sensor 260 and a drive control unit 270, and an operation switch 280 disposed in the cabinet 210. It has.

  The tank 220 stores tap water. The tank 220 includes a water supply port 221, and tap water is supplied into the tank 220 from the water supply port 221. The water supply port 221 is closed by the cap 222. An opening 223 is formed in the tank 220 at a position corresponding to the discharge port 211 of the cabinet 210. Furthermore, the tank 220 is covered with a heat insulating material 224.

  The electrolysis unit 230 includes a pair of insoluble or highly corrosion-resistant electrodes 231 disposed on the bottom of the tank 220. For the pair of electrodes 231, for example, a ferrite electrode or a titanium electrode coated with a noble metal is used.

  A direct current flows through the pair of electrodes 231 by applying a direct current voltage. Thereby, the tap water in the tank 220 is electrolyzed.

  In general, tap water contains chlorine ions of several ppm to several tens of ppm due to reduction of a chlorine agent injected for disinfection and sterilization.

  When a direct current flows through the pair of electrodes 231, chlorine ions are oxidized and chlorine gas is generated on the anode side as represented by the formula (1).

2Cl ⁻ → Cl ₂ + 2e (1)
The generated chlorine gas dissolves in water, and hypochlorous acid (HClO) is generated as shown in formula (2). Hypochlorous acid exhibits a sterilizing action due to its high oxidizing power.

Cl ₂ + H ₂ O → HClO + HCl (2)
Electrolysis generates oxygen gas from the anode and hydrogen gas from the cathode. These gases are discharged to the outside through gas vent holes (not shown) provided in the upper portions of the tank 220 and the cabinet 210, respectively.

  Thus, the electrolyzed water produced by electrolysis has a sterilizing action due to the effect of hypochlorous acid.

  The mist generating unit 240 includes a water absorbing body 241, an ultrasonic vibration unit 242, and a press holding member 243.

  The water absorption body 241 is formed by forming a material having a high water absorption capacity or water retention capacity, such as sponge, fiber, or felt, into a cylindrical shape. The water absorber 241 is inserted into the tank 220 through the opening 223 and immersed in the electrolyzed water (tap water) in the tank 220. The electrolyzed water generated in the tank 220 is sucked up by the upper end of the water absorber 241.

  The ultrasonic vibration unit 242 is disposed between the discharge port 211 and the opening 223. As shown in FIGS. 6B and 6C, the ultrasonic unit 242 includes a disk-shaped vibrating plate 242a and a flat annular piezoelectric ceramic 242b.

  The vibration plate 242a is made of a thin metal plate (for example, nickel material) or a resin plate, and its lower surface is in close contact with the upper end surface of the water absorber 241. A large number of through holes 242c are formed in a circular area slightly smaller than the upper end surface of the water absorbent body 241 at the center of the vibration plate 242a (see FIG. 6C). For example, about 200 through holes 242c having a diameter of several microns are formed. The through hole 242c has a tapered shape whose diameter decreases toward the upper side (the piezoelectric ceramic 242b side). The through hole 242 faces the outside through the discharge port 211. 6B and 6C, for convenience, the through hole 242c is drawn so as to have the same diameter in the vertical direction.

  The piezoelectric ceramic 242b is made of a known piezoelectric material such as lead zirconate titanate, and is polarized in the thickness direction. A first electrode 242d and a second electrode 242e made of a conductive material such as gold are mounted on the upper and lower surfaces of the piezoelectric ceramic 242b, respectively. These electrodes 242d and 242e are formed in a ring shape like the piezoelectric ceramics 242b, and lead wires for power supply (not shown) are connected to each.

  The vibration plate 242a is fixed to the lower surface of the second electrode 242e by a fixing method such as adhesion.

  The pressing holding member 243 includes a holding plate 243a that holds the lower end of the water absorbing body 241 and a spring 243b disposed below the holding plate 243a, and biases the water absorbing body 241 upward while holding it. Thereby, the water absorbing body 241 contacts the lower surface of the vibration plate 242a with an appropriate pressing force.

  Thus, in the ultrasonic vibration unit 242, when an alternating voltage of a predetermined frequency (for example, 160 KHz, 50 Vp-p) is applied between the first electrode 242d and the second electrode 242e, the piezoelectric ceramic 242b Vibrates in the radial direction. Due to the vibration of the piezoelectric ceramic 242b, the vibration plate 242a vibrates ultrasonically. The electrolyzed water supplied to the upper end of the water absorbing body 241 is atomized by the ultrasonic vibration of the vibrating plate 242a to become electrolytic mist, and is discharged to the outside from the discharge port 211 through the through hole 242c.

  The water amount sensor 250 is disposed inside the tank 220 and detects the amount of water in the tank 220. As the water amount sensor 250, for example, a float type liquid level sensor can be used. In this case, if the float is displaced as the amount of water in the tank 220 changes, a detection signal corresponding to the displacement is output. In addition, as the water amount sensor 250, various liquid level sensors such as a magnetic type, an electrode type, and an optical type can be used.

  The air volume sensor 260 detects the air volume of the air discharged from the exhaust port 111 toward the cleaning device 200 and outputs a detection signal corresponding to the air volume.

  FIG. 7 is a diagram for explaining the configuration of the drive control unit 270. FIG. 7A is a diagram illustrating the configuration of the drive control unit 270, and FIG. 7B is a diagram illustrating the configuration of the vibration unit driving unit 273.

  The drive control unit 270 includes a control unit 271, an electrolysis drive unit 272, a vibration unit drive unit 273, and a USB interface 274.

  The control unit 271 is configured by a CPU or the like. An operation start / stop signal is input from the operation switch 280 to the control unit 271. In addition, detection signals are input from the water volume sensor 250 and the air volume sensor 260. The control unit 271 outputs a control signal to the electrolysis drive unit 272 and the vibration unit drive unit 273 based on signals input from the operation switch 280, the water volume sensor 250, and the air volume sensor 260.

  The electrolysis drive unit 272 drives the electrolysis unit 230 according to a control signal from the control unit 271. That is, the pair of electrodes 231 is energized.

  As shown in FIG. 7B, the vibration unit driving unit 273 includes an oscillation circuit 273a, a transistor 273b, and a step-up transformer 273c. The ultrasonic vibration unit 242 is supplied from the DC voltage supplied from the USB interface 274 by these circuits. AC voltage is generated for driving. Then, the generated AC voltage is applied according to the control signal from the control unit 271 to drive the ultrasonic vibration unit 242.

  The USB interface 274 includes a USB connector 274a and a USB device 274b. When the cleaning apparatus 200 is attached to the projector main body 100, the device-side USB terminal 302 of the USB cable 300 is connected to the USB connector 274a. The USB device 274b performs data communication based on the USB standard with the USB device 164b on the projector main body 100 side.

  In addition, the USB interface 274 supplies the DC voltage supplied from the projector main body 100 to the control unit 271, the electrolytic drive unit 272, and the vibration unit drive unit 273 as indicated by the broken line in the figure.

  FIG. 8A is a diagram showing a processing flow of the cleaning operation by the cleaning device 200. FIG. 8B is a diagram illustrating a processing flow of drought display by the projector main body 100.

  First, the cleaning operation by the cleaning device 200 will be described with reference to FIG.

  When the cleaning device 200 and the projector main body 100 are connected by the USB cable 300 and power is supplied from the USB interface 274 to the control unit 271, the control unit 271 is activated. The control unit 271 monitors whether or not the operation switch 280 is turned on (S101).

  When the operation switch is turned on by the user (S101: YES), the clean operation is started. First, the control unit 271 determines whether or not the inside of the tank 220 is in a drought state (S102). When the water amount detected by the water amount sensor 250 is lower than a predetermined reference water amount, the control unit 271 determines that the water is in a drought state.

  When determining that the tank 220 is in a drought state (S102: YES), the control unit 271 outputs drought information to the projector main body 100 via the USB interface 274 and the USB cable 300 (S103), and ends the clean operation. To do.

  On the other hand, when determining that the inside of the tank 220 is not in a drought state (S102: NO), the control unit 271 determines whether or not the exhaust is performed from the exhaust port 111 of the projector main body 100 (S104). If the air volume detected by the air volume sensor 260 is greater than a predetermined amount, the control unit 271 determines that exhaust is being performed.

  When it is determined that the exhaust is not performed (S104: NO), the control unit 271 waits until the exhaust is performed. On the other hand, if it determines with exhausting being made (S104: YES), it will energize a pair of electrode 231 and electrolyze the tap water in the tank 200 (S105). The electrolysis is performed for a predetermined electrolysis time (for example, about 10 minutes) so that the concentration of hypochlorous acid contained in the electrolyzed water falls within an appropriate range (a range in which the concentration is not too high). During electrolysis, the polarity of the voltage applied to each electrode 231 is reversed at regular time intervals (for example, every 2 minutes). Thereby, scales such as calcium and magnesium can be prevented from adhering to the electrode 231.

  When the electrolysis is completed, the control unit 271 drives the ultrasonic vibration unit 242 (S106). Thereby, as described above, the electrolyzed water in the tank 200 is discharged from the discharge port 211 as electrolytic mist.

  The electrolytic mist discharged from the discharge port 211 is diffused around the projector by the exhaust discharged from the exhaust port 111 after cooling the heat generating components such as the lamp 121 and the liquid crystal panels 123, 124, and 125. Thus, the exhaust itself contacting the electrolytic mist is cleaned by the sterilizing action of hypochlorous acid contained in the electrolytic mist. Further, the air around the projector is cleaned by the diffused electrolytic mist.

  While the ultrasonic vibration unit 242 is being driven, the control unit 271 monitors whether the operation switch 280 is turned off, whether the tank 220 is in a drought state, and whether exhaust is stopped (S107 to S109). ).

  When the control unit 271 determines that the operation switch 280 is turned off (S107: YES), the control unit 271 stops the ultrasonic vibration unit 242 (S110) and ends the clean operation. If it is determined that the tank 220 is in a drought state (S108: YES), drought information is output to the projector main body 100 (S111), the ultrasonic vibration unit 242 is stopped (S110), and the cleaning operation is terminated. . Further, when the control unit 271 determines that the exhaust is stopped (S109: YES), the control unit 271 stops the ultrasonic vibration unit 242 (S110) and ends the cleaning operation.

  Next, with reference to FIG. 8B, the drought display by the projector main body 100 will be described.

  During operation of the projector main body 100, the control unit 160 monitors whether drought information is input from the cleaning device 200 via the USB interface 164 (S201). When the drought information is output from the cleaning device 200 by the process of step S103 or S111 in FIG. 8A, and drought information is input thereby (S201: YES), the control unit 160 displays the drought information on the screen. Is displayed (S202). That is, the control unit 160 outputs a control signal that instructs the video signal processing unit 165 to display drought information. In accordance with the control signal from the control unit 160, the video signal processing unit 165 receives an indication from the outside that the cleaning device 200 is in a drought state (for example, a character display such as “please supply water to the cleaning device”). The synthesized video signal is output to the panel driver 166. Thereby, drought information is superimposed and displayed on a part of the projected image displayed on the screen.

  As described above, according to the present embodiment, the exhaust from the projector main body 100 after the heat generating components in the cabinet 110 can be cleaned by the electrolytic mist discharged from the cleaning device 200 can be cleaned. Can relieve discomfort.

  Moreover, according to this Embodiment, it is not necessary to provide the fan for diffusing electrolytic mist in the cleaning apparatus 200, and the cleaning apparatus 200 can be simplified.

  Furthermore, according to the present embodiment, the exhaust gas emitted from projector main body 100 after cooling the heat-generating component is used for the diffusion of the electrolytic mist, so that the exhaust gas can be brought into contact with the electrolytic mist before it spreads widely in the external space. The cleaning efficiency of the exhaust can be increased.

  In addition, according to the present embodiment, when the exhaust port 111 is not exhausted, the ultrasonic vibration unit 242 (mist generation unit 240) is stopped, so that the electrolytic mist discharged from the cleaning device 200 is reduced. It is possible to prevent the humidity inside the cabinet 110 (projector body 100) from entering the cabinet 110 through the exhaust port 111.

  In the process flow of FIG. 8A, the presence / absence of exhaust is determined in step S104 before electrolysis in step S105, but after the electrolysis, ultrasonic waves are detected in step S106. The presence or absence of exhaust may be determined before driving the vibration unit 242. Alternatively, the presence / absence of exhaust may not be determined before electrolysis, but only before the ultrasonic vibration unit 242 is driven. Even with such a configuration, it is possible to achieve the effect of preventing the entry of electrolytic mist from the exhaust port 111.

  Further, according to the present embodiment, since it is notified on the screen that the inside of the tank 220 of the cleaning device 200 is in a drought state, it is easy for the user to recognize that the liquid amount in the tank 220 is insufficient.

  Furthermore, according to the present embodiment, exhaust gas can be purified using electrolyzed water generated by electrolysis. Therefore, the user does not need to prepare a dedicated medicine having a cleaning effect, and the user does not take much time and effort.

  Further, according to the present embodiment, since the tank 220 is covered with the heat insulating material 224, even if a part of the exhaust from the exhaust port 111 is blown to the cleaning device 200, the electrolyzed water in the tank 220 is heated. It is hard to be done. Therefore, it can prevent that hypochlorous acid vaporizes and the density | concentration falls because the temperature of electrolysis water becomes high.

  Furthermore, according to the present embodiment, the mist generating unit 240 is configured to make the electrolyzed water absorbed by the water absorbing body 241 into a mist shape by the ultrasonic vibration of the ultrasonic vibration unit 242. Even if it is greatly shaken or tilted, the electrolyzed water (tap water) in the tank 220 is difficult to leak from the discharge port 211.

<Example of change>
9 to 11 are diagrams showing the configuration of the projector according to the modification. FIG. 9 is a perspective view showing a state before the cleaning device 200 is attached to the projector main body 100, and FIG. 10 is a perspective view showing a state where the cleaning device 200 is attached to the projector main body 100. FIG. 11A is an internal perspective view of the projector as viewed from above, and FIG. 11B is an internal perspective view of the projector as viewed from the rear. In FIG. 11, for the sake of convenience, configurations other than the portions according to the present invention are not shown.

  With reference to these drawings, a projector according to a modification will be described. In addition, about the same structure as the said embodiment, the same number is attached | subjected and description is abbreviate | omitted.

  In the projector main body 100, a first exhaust port 113 is formed on the front surface of the cabinet 110. A second exhaust port 114 is formed on the right side surface of the cabinet 110.

  A power output terminal 115 is provided on the right side surface of the cabinet 110. The power output terminal 115 is connected to the power supply unit 169 shown in FIG. 4, and a power source (DC voltage) for driving the cleaning device 200 is supplied from the application unit 169.

  FIG. 9B is a diagram illustrating the left side rear portion of the cabinet 210. In the cleaning device 200, a power input terminal 213 as shown in FIG. 9B is provided at a position corresponding to the power output terminal 115 on the rear side of the left side surface of the cabinet 210. When the cleaning device 200 is attached to the right side surface of the projector main body 100 (cabinet 110), the power input terminal 213 contacts the power output terminal 115. Accordingly, power is supplied to the control unit 271, the electrolytic drive unit 272, and the vibration unit drive unit 273 via the power input terminal 213.

  In this modified example, since power is supplied to the cleaning device 200 by the power output terminal 115 and the power input terminal 213, power is not supplied from the USB interface 274.

  As shown in FIG. 11, an exhaust fan 141 and an intake fan 151 are arranged inside the cabinet 110. The intake fan 151 takes in outside air from an intake port 115 formed on the bottom surface of the cabinet 110 and supplies the outside air to the heat generating parts such as the lamp 121 and the liquid crystal panels 123, 124, and 125 through the supply duct 152 to generate these heat. Cool the parts.

  The exhaust fan 141 is disposed so that the exhaust surface thereof faces the first exhaust port 113. Air that is supplied from the supply duct 152 to the heat generating component and is warmed by cooling the heat generating component is discharged to the outside by the exhaust fan 141 through the first exhaust port 113. The exhaust discharged from the first exhaust port 113 drifts around the projector.

  An exhaust duct 153 is connected between the intake fan 151 and the second exhaust port 114. A part of the outside air sent out from the intake fan 151 is exhausted to the outside through the exhaust duct 153 through the exhaust duct 153 as shown by the broken line arrows in the figure.

  In a state where the cleaning device 200 is attached to the projector main body 100, the discharge port 211 is located in front of the second exhaust port 114 (see FIGS. 9 and 10). When the cleaning device 200 is operated, the electrolytic mist discharged from the discharge port 211 is diffused by the exhaust from the second discharge port 114. The diffused electrolytic mist contacts and cleans the exhaust after cooling the heat-generating components floating around the projector.

  In the configuration of the present modified example, a part of the outside air taken in by the intake fan 151 is exhausted toward the discharge port 211, not the exhaust heated by cooling the heat-generating components, so that the cooler exhaust is used as the electrolytic mist. Can be sprayed. Thereby, evaporation of electrolytic mist can be further suppressed.

<Others>
The embodiment of the present invention can be variously modified in addition to the above.

  For example, in the above embodiment, the cleaning device 200 is attached to the projector main body 100 by the engagement piece 112 and the engagement hole 212. However, the present invention is not limited to this, and any attachment structure may be used as long as the cleaning apparatus 200 is detachable from the projector main body 100, that is, can be attached and detached without using a tool such as a screwdriver. For example, a magnet may be disposed on one of the projector main body 100 and the cleaning device 200 and a magnetic member such as iron may be disposed on the other, and the cleaning device 200 may be attached to the projector main body 100 by a magnetic force.

  Moreover, in the said embodiment, although it is set as the structure by which the cleaning apparatus 200 is attached to the side surface of the cabinet 110, you may be set as the structure by which the cleaning apparatus 200 is attached to the front surface, rear surface, and upper surface of the cabinet 110, for example. .

  Further, in the above embodiment, the presence or absence of exhaust from the exhaust port 111 is determined based on the air volume detected by the air volume sensor 260. However, the present invention is not limited to this. For example, the following configuration can also be used. That is, the control unit 160 of the projector main body 100 outputs drive information indicating that the exhaust fan 140 is driven and stop information indicating that the exhaust fan 140 is stopped to the cleaning device 200 via the USB cable 300. Is done. Thus, when drive information is input from the USB interface 274 to the control unit 271, the control unit 271 determines that exhaust is being performed in step S <b> 104 of FIG. 8A. When the stop information is input, the control unit 271 determines that the exhaust is stopped in step S109 of FIG. With such a configuration, the air volume sensor 260 can be reduced.

  Moreover, in the said embodiment, it is set as the structure which the liquid with a cleansing effect | action is produced | generated by electrolysis. However, the present invention is not limited to this. For example, a chemical solution having a sterilizing action such as hypochlorous acid may be supplied to the tank 220. Moreover, it replaces with the electrolysis part 230, an ozone generator is provided, ozone is supplied in the tank 220, and this ozone melt | dissolves in a tap water, The structure which produces | generates ozone water with a disinfection action is produced | generated. It may be said.

  Further, in the above-described embodiments and modifications, the power of the cleaning device 200 is supplied from the projector main body 100. However, the present invention is not limited to this. For example, a battery may be mounted on the cleaning device 200. Further, an AC cord may be connected to the cleaning device 200 and commercial power may be supplied. In this case, the cleaning device 200 is provided with a power supply unit for generating various voltages supplied to each unit from a commercial power supply.

  Moreover, you may make it arrange | position the alerting | reporting means (a lamp | ramp, a buzzer, etc.) for alert | reporting that the inside of the tank 220 is a drought state, or exhaust is not made | formed to the cleaning apparatus 200. FIG.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

100 Projector body (device body)
140 Exhaust fan (fan)
151 Intake fan (fan)
153 Exhaust duct (duct)
160 Control unit (notification control unit)
200 Cleaner 220 Tank 230 Electrolyzer 240 Mist Generator 250 Water Quantity Sensor (Liquid Quantity Detector)
260 Air volume sensor (wind detector, exhaust detector)
271 Control unit 274 USB interface (exhaust detection unit)

Claims (7)

In a projection display device,
A fan for cooling the heat generating components arranged in the device body,
A cleaning device that is detachably attached to the device main body and discharges a mist having a cleaning action,
The cleaning device is attached to the device body such that mist discharged from the cleaning device is diffused by air generated by the fan and exhausted from the device body.
A projection display device characterized by that. The projection display device according to claim 1,
The fan includes an exhaust fan that discharges air heated by cooling the heat-generating component from the apparatus main body.
A projection display device characterized by that. The projection display device according to claim 1,
The fan includes an intake fan that takes in outside air and supplies it to the heat generating component,
The apparatus body is provided with a duct for directing a part of the air from the intake fan to the cleaning apparatus.
A projection display device characterized by that. The projection display device according to any one of claims 1 to 3,
The cleaning device comprises:
A tank for storing a cleaning liquid;
A mist generating unit for generating the mist from the liquid;
A control unit that drives and controls the mist generation unit;
An exhaust detection unit for detecting exhaust from the device main body to the cleaning device,
The control unit stops the mist generating unit when there is no exhaust to the cleaning device.
A projection display device characterized by that. The projection display device according to claim 4,
The cleaning device comprises:
A liquid amount detector for detecting the amount of liquid in the tank;
When the liquid amount is less than a predetermined amount, the control unit outputs liquid amount shortage information to the apparatus main body,
The apparatus main body is
A notification control unit for notifying the liquid amount shortage of the cleaning device when the liquid amount shortage information is input;
A projection display device characterized by that. The projection display device according to claim 4 or 5,
The cleaning device comprises:
An electrolysis unit that electrolyzes the electrolyte to be stored in the tank;
A projection display device characterized by that. In the cleaning device,
A tank for storing a cleaning liquid;
A mist generating unit for generating mist from the liquid;
A control unit that drives and controls the mist generation unit;
A wind detection unit for detecting air flow to the cleaning device;
With
The control unit stops the mist generating unit when the blowing is smaller than a predetermined amount.
A cleaning device characterized by that.

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