WO2010109595A1 - 映像生成デバイスの防塵構造、および投写型表示装置 - Google Patents
映像生成デバイスの防塵構造、および投写型表示装置 Download PDFInfo
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- WO2010109595A1 WO2010109595A1 PCT/JP2009/055824 JP2009055824W WO2010109595A1 WO 2010109595 A1 WO2010109595 A1 WO 2010109595A1 JP 2009055824 W JP2009055824 W JP 2009055824W WO 2010109595 A1 WO2010109595 A1 WO 2010109595A1
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- Prior art keywords
- air
- air passage
- filter
- air filter
- dust
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3144—Cooling systems
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
- G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133311—Environmental protection, e.g. against dust or humidity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/36—Airflow channels, e.g. constructional arrangements facilitating the flow of air
Definitions
- the present invention relates to a dust-proof structure of an image generation device such as a liquid crystal display (LCD) panel or DMD (Digital Micromirror Device), and a projection display device including the dust-proof structure.
- an image generation device such as a liquid crystal display (LCD) panel or DMD (Digital Micromirror Device)
- DMD Digital Micromirror Device
- Patent Document 1 discloses a configuration in which the entire projection display device is covered with a protective cabinet, and an air filter and a cooling fan are provided in the protective cabinet. In this dustproof structure, the dust is removed from the air entering the protective cabinet from the outside by an air filter, so that the entire projection display device is encased by the cooling air after the dust is removed.
- Patent Document 2 discloses that an LCD panel (hereinafter abbreviated as LCD) that generates a projected image includes a red optical path (R optical path), a green optical path (G optical path), A projection display device is described which is a so-called three-plate liquid crystal projector, which is arranged in a blue light path (B light path).
- R optical path red optical path
- G optical path green optical path
- B light path blue light path
- air blowing paths are provided corresponding to the G light path and the B light path, respectively, and different air filters are provided in these air blowing paths.
- the G optical path and the B optical path are fed with cooling air from which dust has been removed by an air filter.
- the B component in the energy of light applied to the LCD is the largest, and the R component and the G component are approximately the same. Therefore, a configuration that preferentially cools the B optical path over the G optical path is adopted. It has been. Therefore, in this dustproof structure, the dust collection performance of the air filter arranged in the air passage of the B optical path is set lower than that of the air filter arranged in the air passage of the G optical path. With this configuration, the air flow resistance of the B optical path is smaller than the air flow path of the G optical path, and the ventilation resistance by the air filter is reduced, and the cooling performance is improved.
- the configuration described in Patent Document 1 described above is a configuration in which dust is contained in all the cooling air sucked into the projection display device to prevent the entire projection display device from dust. For this reason, in this configuration, the cooling performance of the projection display device is poor, and the amount of heat generated by the projection display device is relatively large. Therefore, with this configuration, a large amount of air is required to sufficiently cool the entire projection display device.
- the entire projection display apparatus is covered with a protective cabinet, it is necessary to increase the size and weight of the apparatus, and to provide a structure in which the protective cabinet maintains high hermeticity.
- the cooling fan provided in the projection display device it is necessary to provide a plurality of high static pressure fans in order to overcome the ventilation resistance of the air filter.
- the air filter may be clogged when used in a poor environment or for a long time.
- the air filter is clogged, sufficient cooling air cannot be sent to the mounted components in the projection display device.
- the temperature of the mounted component is increased, malfunction occurs, and the life of the mounted component is significantly reduced.
- the projection display device may stop due to the activation of the protection circuit.
- Bias in the air flow to the air path of the B optical path causes clogging in the air filter of the air path of the B optical path, and eventually the air paths of both optical paths are blocked, causing the temperature of the optical components to rise significantly. It is easy to cause a decrease in the life of the mounted component and damage to the mounted component.
- An object of the present invention is to provide a dust-proof structure of a video generation device and a projection display device that can solve the above-described technical problems.
- An example of the purpose is to prevent a decrease in brightness of the projected image and a change in color temperature of the projected image, and to suppress noise caused by the cooling fan.
- the dust-proof structure of the image generation device is: A video generation device for each of red, green and blue; A red airway, a green airway, and a blue airway arranged so that cooling air can be blown to each of the image generation devices; A first air filter disposed in each of the red air path, the green air path, and the blue air path; A second air filter having a filter eye smaller than the first air filter, disposed in at least one of the green air passage and the blue air passage.
- the projection display device includes the dustproof structure of the image generation device of the present invention.
- the projection display apparatus according to the present embodiment is a three-plate liquid crystal projector in which LCDs as image generation devices that generate an image to be projected are arranged in an R optical path, a G optical path, and a B optical path, respectively.
- the projection display device includes a housing, an intake opening provided in the housing, an intake louver as a louver member detachably provided in the intake opening, and an optical component for cooling the optical component.
- An intake duct that is disposed on the intake side of the cooling fan and communicates with the intake port of the intake louver, and an LCD duct that is disposed on the discharge side of the cooling fan and blows cooling air to the LCD.
- the optical parts include the LCD and polarizing plates disposed before and after the optical path with respect to the LCD.
- the respective optical components arranged in the R optical path, the G optical path, and the B optical path are referred to as an R optical component, a G optical component, and a B optical component, respectively.
- each air passage arranged so that cooling air can be blown onto each optical component includes an air intake passage of the air intake duct and an air supply passage of the LCD duct.
- FIG. 1A to FIG. 2F show an embodiment in which the present invention is applied to a projection display device having an intake opening on the left side and the back of the housing.
- 1A to 2E show a first embodiment
- FIG. 2F shows a second embodiment
- FIG. 2G shows a third embodiment.
- FIGS. 3A to 5D show an embodiment in which the present invention is applied to a three-plate projector having an intake opening on the left side surface of the housing.
- 3A to 3C show a fourth embodiment
- FIG. 3D shows a fifth embodiment
- FIG. 3E shows a sixth embodiment.
- 4A and 4B show a seventh embodiment
- FIG. 4C shows an eighth embodiment
- FIG. 4D shows a ninth embodiment.
- 5A to 5D and Table 1 show a tenth embodiment.
- First embodiment> 1A to 2D show a first embodiment which is the best mode.
- the projection display apparatus according to the first embodiment is a configuration example having intake openings on the left side and the rear of the housing.
- FIG. 1A is a perspective view showing the projection display device from the front.
- the housing is composed of three structural parts, a bottom housing 11, an upper housing 10, and a lamp lid 12. Internally mounted components of the projection display device are mainly fixed to and supported by the bottom housing 11.
- An operation button 13 is provided on the upper housing 10 and is operated by a user.
- An inflow port 14 for allowing outside air to flow into the housing is provided on the front surface of the housing.
- a temperature sensor which will be described later, is provided inside the casing of the inflow port 14 as temperature detecting means for detecting the temperature of air flowing into the casing from the outside.
- a projection lens 16 is disposed on the front surface of the casing, and the projection lens 16 projects an image generated by the LCD unit including three LCDs onto a projection surface of a screen (not shown).
- FIG. 1B is a perspective view showing the projection display device from the rear.
- an inflow port 19 for allowing outside air to flow into the housing is provided on the left side surface of the housing.
- an R intake opening 20 is provided on the left side surface of the housing for sending outside air to the R optical component arranged in the R optical path.
- the R intake opening 20 is detachably provided with an R intake louver 21 for taking in outside air.
- a G optical component disposed in the G optical path and the B optical path and a GB intake opening 26 for sending outside air to the B optical component are provided on the rear surface of the housing.
- a GB intake louver 22 for taking in outside air is detachably provided in the GB intake opening 26.
- Each of the R intake louver 21 and the GB intake louver 22 has a plurality of intake ports.
- an IO terminal panel 23 and an AC inlet 24 are provided on the rear surface of the casing.
- the IO terminal panel 23 has signal input terminals from other electronic devices such as a PC (personal computer) and a DVD (Digital Versatile Disc) player, and signal output terminals to other display devices.
- the AC inlet 24 is a cable outlet for supplying power to the projection display device from the outside.
- an exhaust port 15 for exhausting the air in the housing to the outside is provided on the right side surface of the housing.
- FIG. 1C is a perspective view showing a state in which the upper housing 10 is removed from the state shown in FIG. 1B.
- the power supplied from the outside is subjected to power control such as voltage transformation by the power source 30, and a ballast power source (not shown) that emits a lamp (not shown) as a light source for irradiating the LCD with light, and a main circuit board 31.
- the ballast power source performs power adjustment such as causing the lamp provided in the lamp unit 32 to emit light, stably maintaining the light emission state, and changing the amount of power supplied to the lamp. As shown in FIG.
- the main circuit board 31 includes a non-volatile memory 27 as a storage unit that stores a plurality of types of information, and a control circuit unit 28 as a control unit for performing a plurality of types of control. ing.
- the main circuit board 31 generates video such as controlling the three LCDs based on external signals, performs drive control of the entire projection display device, and stores a plurality of types of information related to these controls.
- the light emitted from the emitted lamp is split by a plurality of optical components provided in the optical engine 33 and is irradiated to each LCD. In each LCD, an image is generated based on the image signal, is enlarged by a projection lens 16 through a light combining unit (not shown) provided in the LCD unit, and is projected onto a projection surface such as a screen.
- the power source 30, the ballast, the main circuit board 31, the lamp, the optical components in the optical engine 33, etc. generate heat and increase in temperature with this series of projection operations.
- An increase in the temperature of electronic components and optical components degrades these components and shortens their service life. For this reason, in order to prevent the temperature rise of these components, the components are cooled using the cooling fan.
- the G optical component and the B optical component in the optical engine 33 include a G sirocco fan as a first cooling fan via a GB intake louver 22 and a GB intake duct 40 (not shown).
- 36 and B sirocco fan 51 send the cooling air sucked. Cooling air sucked by an R sirocco fan (multi-blade fan) 35 as a second cooling fan is sent to the R optical component via the R intake louver 21 and the R intake duct 37.
- the projection display device is an exhaust fan for exhausting the cooling air discharged into the housing after cooling the LCD unit and the air flowing in from the inlets 14 and 19 from the exhaust port 15 to the outside of the housing.
- 34 is provided.
- the lamp unit 32 has a light source fan 39 for cooling the lamp.
- the temperature sensor 38 detects the temperature of the outside air flowing in from the inlet 14 and sends information to the control circuit unit 28 of the main circuit board 31.
- the control circuit unit 28 of the main circuit board 31 is based on the prestored information on the temperature of the outside air and the rotational speed of each fan, and each sirocco fan 35, 36, 51, the rotational speeds of the exhaust fan 34 and the light source fan 39 are each controlled to a predetermined rotational speed.
- FIG. 2A is a perspective view showing the respective air filters disassembled by removing the GB intake louver 22 from the GB intake opening 26 of the housing.
- a GB intake duct 40 is provided between the G sirocco fan 36 and the B sirocco fan 51 and the GB intake louver 22 arranged inside the projection display device. It has been.
- the GB intake duct 40 includes two intake passages for cooling the G optical component and the B optical component, respectively.
- the GB intake duct 40 is provided with a GB air filter 43 as a first air filter (pre-filter) at a position adjacent to the GB intake louver 22.
- a G air filter 41 and a B air filter 42 as a second air filter having a finer (smaller) filter than the GB air filter 43 are slidable. Supported and attached.
- the G air filter 41 and the B air filter 42 are disposed between the GB air filter 43, the G sirocco fan 36, and the B sirocco fan 51.
- the opening area of the GB intake duct 40 is larger than that of the LCD duct whose opening area is relatively narrow in order to blow cooling air onto the LCD. For this reason, the G air filter 41 and the B air filter 42 are arranged in the GB intake duct 40, so that the ventilation cross-sectional area of the filter can be made larger than the configuration arranged in the LCD duct, and clogging occurs. Can be prevented.
- the GB air filter 43 is a urethane-based porous filter, and is an air filter having a medium size performance composed of several tens of cells per inch.
- the GB air filter 43 is held and held inside the GB intake louver 22 by a locking claw.
- the GB intake louver 22 is attached by fitting a convex portion provided at the upper end portion and a concave portion provided in the GB intake opening portion 26 of the housing.
- the G air filter 41 and the B air filter 42 are held in the GB intake duct 40 by attaching the GB intake louver 22 to the GB intake opening 26 of the housing. These three air filters 41, 42, and 43 can be easily replaced through the GB intake opening 26 or from the inside of the housing by removing the GB intake louver 22 from the GB intake opening 26. It is.
- the structures of the G air filter 41 and the B air filter 42 will be described with reference to cross-sectional views.
- FIG. 2B shows a cross-sectional view of the G air filter 41
- FIG. 2C shows a cross-sectional view of the B air filter 42.
- the ventilation direction with respect to the G air filter 41 and the B air filter 42 is an arrow direction shown in the drawing.
- the inside of the G air filter 41 has a structure in which the nonwoven fabric 41a is folded back about 8 times.
- a high-efficiency particulate air filter (HEPA filter) having a high dust removal capability is provided. It has been adopted. The reason why the HEPA filter is folded back is to extend the life of the G air filter 41 by reducing the ventilation resistance and reducing the amount of dust attached per unit area.
- the inside of the B air filter 42 has a portion in which the nonwoven fabric 42a is folded eight times, and has a portion in which the bag-like nonwoven fabric is filled with activated carbon 42b.
- a ULPA filter Ultra Low Penetration Air Filter
- the activated carbon 42b functions to adsorb fumes such as fat and oil contained in cigarette smoke and odors.
- the B air filter 42 having a double structure functions as a second air filter that is finer than the G air filter 41.
- FIG. 2D is a perspective view showing an LCD duct for sending cooling air to the LCD unit
- FIG. 2E is an exploded plan view showing the LCD duct.
- an R air passage 45r, a G air passage 45g, and a B air passage 45b corresponding to the R optical component, the G optical component, and the B optical component are formed inside the LCD duct 45, respectively.
- a dedicated air outlet is provided below each of the R optical component, the G optical component, and the B optical component arranged in the LCD unit.
- the air taken in from the R intake louver 21 is guided to the intake port of the R sirocco fan 35 via the R air filter 50 and the R intake duct 37.
- the cooling air discharged from the discharge port of the R sirocco fan 35 is sent to the R air passage 45 r of the LCD duct 45.
- the cooling air is sent to the R-LCD 47 of the R optical component through the R air passage 45r.
- the air taken in from the GB intake louver 22 is guided to the intake port of the G sirocco fan 36 via the intake passages of the GB air filter 43, the G air filter 41, and the GB intake duct 40.
- the cooling air discharged from the discharge port of the G sirocco fan 36 is sent to the G air passage 45g of the LCD duct 45. Then, the cooling air is sent to the G-LCD 48 of the G optical component through the G air passage 45g.
- the air taken in from the GB intake louver 22 is guided to the intake port of the B sirocco fan 51 through the intake passages of the GB air filter 43, the B air filter 42, and the GB intake duct 40.
- the cooling air discharged from the outlet of the B sirocco fan 51 is sent to the B air passage 45 b of the LCD duct 45. Then, the cooling air is sent to the B-LCD 49 of the B optical component through the B air passage 45b.
- the cooling air sent into the LCD duct 45 flows into the three optical paths from the dedicated air outlets toward the LCDs 47, 48, and 49 of the LCD unit through the air passages.
- a urethane-based porous filter having a thickness of about 2 mm is used, and the performance of a medium size consisting of 30 cells per inch is used. Is an air filter.
- the G air filter 41 and the B air filter 42 as the second air filter have the same configuration as described above.
- the dust-containing air is first removed by the R air filter 50 and the GB air filter 43 from the dust having a particle size of about 80 ⁇ m or more. Since the R optical component has a small influence on the decrease in brightness and the change in color temperature when dust adheres, the air that has passed through the R air filter 50 is blown to the R air passage 45r of the R optical component as it is. .
- dust having a particle size of about 0.3 ⁇ m or more is removed by a box-shaped G air filter 41 formed by folding a HEPA filter inside.
- the air sent to the B optical component is made up of dust having a particle size of about 0.15 ⁇ m or more, cigarette dust, etc. by a box-shaped B air filter 42 having a double structure composed of an ULPA filter and activated carbon inside. Fume-based fine dust is removed.
- the fineness of the R air filter 50 and the GB air filter 43 as the first air filter is the same as that of the GB air filter 43 or coarser than that.
- the G air filter 41 and the B air filter 42 in the GB intake duct 40 are not provided in the ventilation path corresponding to the R optical component, and the fineness of the eyes is the same as that of the B air filter 42. It is desirable to be coarser than that.
- the GB air filter 43 as the first air filter is configured to be separately arranged for the G optical component and the B optical component, whether the fineness of the eyes in the G air filter 41 is the same as that of the B air filter 42 It is desirable to be coarser than that. The reason is as follows.
- ⁇ R optical parts are less affected by dust adhering to brightness reduction and color temperature change.
- the G air filter 41 is used to prevent only the dust from adhering to the G optical component to prevent a decrease in brightness, the bright state of the projected image is maintained for a relatively long time. ) Will become prominent. Therefore, in order to prevent the color temperature from changing, it is necessary to prevent the fine dust (such as fine sand dust and cigarette dust) from adhering to the B optical component by using the B air filter 42.
- the change in the color temperature is prevented by preventing only the dust from adhering to the B optical component, the projected image can be prevented from becoming yellow, but the brightness decreases relatively quickly. This is because the effect disappears.
- the G optical component disposed in the G optical path that affects the decrease in the brightness of the projected image and the B optical path disposed in the B optical path that affects the change in color temperature.
- Optical components can be prevented from adhering to dust.
- this embodiment can reduce the air flow resistance with respect to the R optical component disposed in the R optical path that has a relatively small influence on the projected image. With this configuration, it is possible to realize a projection display device that prevents a decrease in brightness of a projected image and a change in color temperature and suppresses noise caused by a cooling fan.
- air filters are selectively and appropriately arranged in the R optical path, the G optical path, and the B optical path, respectively, according to the degree of influence of dust adhesion on the optical component on the projected image. Therefore, it is possible to keep the optical characteristics of the projected image good and to reduce the noise caused by each fan, and to reduce the size of the entire apparatus.
- this embodiment it is possible to easily replace the air filter from the intake duct by removing the intake louver from the intake opening of the housing. For this reason, this embodiment is preferably applied to a projection display device used in a dusty environment where it is necessary to frequently replace the air filter.
- the first embodiment is a projection display device installed in a poor environment where dust and cigarette smoke are mixed.
- the second embodiment is an example of a projection display device that requires only measures against dust when used in semi-outdoors and the like. Compared with the projection display device of the first embodiment, each fan The noise caused by can be reduced.
- the semi-outdoor refers to a space where the entire space is not surrounded by walls even if there is a roof, such as a courtyard, and at least one of the spaces faces the outside.
- FIG. 2F is an exploded plan view showing a configuration of an LCD duct for sending cooling air to the LCD unit.
- the basic configuration of the second embodiment is the same as that of the first embodiment shown in FIG. 2E.
- the second air filter B is provided in the intake passage of the GB intake duct 40.
- the difference is that the air filter 42 is not provided.
- the ULPA filter constituting the B air filter 42 has a higher dust collection performance (dust removal performance) than a general filter, but has a higher ventilation resistance. For this reason, it is not necessary to use the B air filter 42 when used in an environment that does not require handling of tobacco smoke, such as semi-outdoors.
- the rotational speed of the B sirocco fan 51 is set to 4800 rpm when the temperature of the outside air detected by the temperature sensor 38 is 25 ° C.
- the rotation speed of the B sirocco fan 51 is set to 4200 rpm.
- the first embodiment is an example of a projection display device installed in a poor environment in which sand dust and cigarette smoke are mixed.
- the second embodiment is directed to dust when used in semi-outdoors. This is an example of a projection display device that requires the above countermeasure.
- the third embodiment is an example of a projection display device that needs only a countermeasure against cigarette smoke rather than dust when used in a restaurant room, for example.
- the noise is slightly larger than that of the second embodiment, but can be reduced as compared with the first embodiment.
- the third example was able to reduce the noise by about 1.5 dB compared to the first example.
- FIG. 2G is an exploded plan view showing a configuration of an LCD duct for sending cooling air to the LCD unit.
- the basic configuration of the third embodiment is the same as that of the first embodiment shown in FIG. 2E.
- FIG. 2G there is a second air filter G in the intake passage of the GB intake duct 40.
- the difference is that the air filter 41 is not provided.
- the HEPA filter constituting the G air filter 41 has higher dust collection performance than a general filter, but has a large ventilation resistance. For this reason, it is not necessary to use the G air filter 41 when used in an environment that does not require handling of dust, for example, when used indoors such as in a restaurant.
- the absence of the G air filter 41 reduces the ventilation resistance of the intake path of the G optical path, so that the rotational speed of the G sirocco fan 36 can be reduced.
- the rotational speed of the G sirocco fan 36 is set to 4400 rpm.
- the rotational speed of the G sirocco fan 36 is set to 4000 rpm. Reducing the number of rotations of the cooling fan is effective for reducing noise, and the third embodiment can reduce the noise by about 1.5 dB compared to the first embodiment. It was.
- FIG. 3A is a perspective view showing the air filter disassembled by removing the G intake louver 68 from the intake opening of the housing.
- the casing is composed of two structural parts, a bottom casing 61 and an upper casing 60. Internally mounted components of the projection display device are mainly fixed to and supported by the bottom housing 61. An operation button 62 is provided on the upper casing 60 and is operated by the user. On the left side surface of the upper housing 60, an inflow port 69 for allowing outside air to flow into the housing is provided.
- a temperature sensor (to be described later) for detecting the temperature of air flowing from the outside is provided inside the casing of the inflow port 69.
- an RB intake louver 65 is formed at the front side position on the right side surface of the upper housing 60 to suck in the outside air sent to the R optical component and the B optical component arranged in the R optical path and the B optical path, respectively.
- the RB intake louver 65 is formed integrally with the upper casing 61.
- the RB intake louver for feeding outside air into the R optical component and the B optical component on the left side surface of the upper casing 60.
- An opening may be provided, and the RB intake louver 65 may be detachably provided in the RB intake opening.
- a G intake opening 77 for sending outside air to the G optical component arranged in the G optical path is provided at a position on the back side of the right side surface of the upper housing 60.
- the G intake opening 77 is detachably provided with a G intake louver 68 for taking in outside air.
- the RB intake louver 65 and the G intake louver 68 each have a plurality of intake ports.
- an IO terminal panel 63 and an AC inlet 64 are provided on the back surface of the upper housing 60.
- the IO terminal panel 63 has signal input terminals from other electronic devices such as PCs and DVD players, and signal output terminals to other external display devices.
- the AC inlet 64 is a cable outlet for supplying power to the projection display device from the outside.
- FIG. 3B is a perspective view showing a configuration of an LCD duct for sending cooling air to the LCD unit
- FIG. 3C is an exploded plan view showing the LCD duct.
- the R optical component and the B optical component in the optical engine were sucked by the RB sirocco fan 78 as shown in FIG. 3C through the RB intake louver 65 and the RB intake duct 72 as shown in FIGS. 3A and 3B. Cooling air is sent. Cooling air sucked by the G sirocco fan 79 is sent to the G optical component via the G intake louver 68 and the G intake duct 70.
- a G air intake duct 70 is provided between the G sirocco fan 79 disposed inside the projection display device and the G air intake louver 68 inside the housing. Yes.
- a G air filter 66 as a second air filter is slidably supported and attached in the intake passage of the G intake duct 70.
- a G air filter 67 as a first air filter having a coarser mesh than the G air filter 66 is disposed between the G air filter 66 and the G intake louver 68 in the G intake duct 70.
- the G air filter 67 is a urethane-based porous filter, and is an air filter having a medium size performance composed of several tens of cells per inch.
- the G air filter 67 is held and held inside the G intake louver 68 by a locking claw.
- the G intake louver 68 is attached by fitting a convex portion provided at the lower end portion and a concave portion provided in the G intake opening 77.
- the G air filter 66 is held in the G intake duct 70 by attaching a G intake louver 68 to the G intake opening 77 of the upper housing 60. These two air filters 66 and 67 are easily exchanged through the G air intake opening 77 or from the inside of the housing by removing the G air intake louver 68 from the G air intake opening 77 of the upper housing 60. Has been made possible. Since the structure of the G air filter 66 is the same as that of the G air filter 41, description thereof is omitted. Next, the path and structure until the cooling air sucked from the outside is sent to the LCD unit will be described.
- an R air passage 46r, a G air passage 46g, and a B air passage 46b corresponding to the R optical component, the G optical component, and the B optical component are formed inside the LCD duct 46, respectively.
- dedicated air outlets are respectively provided below the R optical component, the G optical component, and the B optical component arranged in the LCD unit.
- the air taken in from the RB intake louver 65 is guided to the intake port of the RB sirocco fan 78 via the RB air filter 71 and the RB intake duct 72.
- the cooling air discharged from the outlet of the RB sirocco fan is sent to the R air passage 46r and the B air passage 46b of the LCD duct 46, respectively.
- the cooling air is sent to the R-LCD 47 of the R optical component through the R air passage 45r and sent to the B-LCD 49 of the R optical component through the B air passage 45b.
- the air taken in from the G intake louver 68 is guided to the intake port of the G sirocco fan 79 through the G air filter 67, the G air filter 66, and the G intake duct 70.
- the cooling air discharged from the discharge port of the G sirocco fan is sent to the G air passage 46g of the LCD duct 46. Then, the cooling air is sent to the G optical component G-LCD 48 through the G air passage 45g.
- the cooling air thus sent into the LCD duct 46 flows from the dedicated air outlets toward the LCDs 47, 48, and 49 of the LCD unit through the respective air passages.
- Both the RB air filter 71 and the G air filter 67 which are the first air filters, use a urethane-based porous filter having a thickness of about 2 mm, and have a medium size performance of 30 cells per inch.
- the structure of the G air filter 66 that is the second air filter is the same as that described above.
- the dust-containing air sucked from the outside of the housing is first removed by the RB air filter 71 and the G air filter 67 with a particle size of about 80 ⁇ m or more. Since the R optical component has little influence on the decrease in brightness and the change in color temperature when dust adheres, the air that has passed through the RB air filter 71 is blown to the R air passage 46r of the R optical component as it is. . Further, the projection display apparatus of the fourth embodiment is intended for use in an environment with a lot of dust such as semi-outdoors, so the air that has passed through the RB air filter 71 is also sent to the B optical component as it is. ing.
- the air sent to the G optical component is further removed of dust having a particle size of about 0.3 ⁇ m or more by a box-shaped G air filter 66 woven with a HEPA filter inside.
- the dust-proof structure by this air cooling system can realize a projection display device that prevents the brightness of the projected image from being lowered and further reduces noise.
- the fourth embodiment is an example of a projection display device that requires only measures against dust when used in semi-outdoors.
- the fifth embodiment is an example of a projection display device installed in a poor environment where dust and cigarette smoke are mixed.
- FIG. 3D is an exploded plan view showing a configuration of an LCD duct for sending cooling air to the LCD unit.
- the basic configuration of the fifth embodiment is the same as the configuration of the fourth embodiment shown in FIG. 3C.
- a second air filter is provided in the intake passage of the RB intake duct 72.
- the difference is that a certain RB air filter 73 is provided.
- the RB air filter 73 is a double-structure air filter shown in FIG. 2C used in the first and third embodiments.
- the ULPA filter has a large ventilation resistance, but has a higher dust collection performance than a general air filter.
- the noise is slightly higher than that of the projection display apparatus of the fourth embodiment, but the noise can be suppressed to the minimum increase.
- the dust-proof structure using this air cooling system can prevent the brightness of the projected image from decreasing and the color temperature from changing, as well as the noise from each fan.
- the cooling air sent to the R optical component and the B optical component is made of dust having a particle size of about 0.15 ⁇ m or more by the box-shaped RB air filter 73 having a double structure of ULPA filter and activated carbon inside, and the dust of the cigarette. Fume-based fine dust such as is removed. That is, the fineness of the pre-air filters (RB air filter 71 and G air filter 67) is the same as or smaller than that of the RB air filter 71, and the air filter (G air in the intake duct). As for the fineness of the eyes in the filter 66 and the RB air filter 73), it is desirable that the G air filter 66 is the same as or coarser than the RB air filter 73.
- the fourth embodiment is an example of a projection display device that only needs countermeasures against dust such as semi-outdoors
- the fifth embodiment is a mixture of dust and cigarette smoke.
- This is an example of a projection display device installed in a poor environment.
- the sixth embodiment is an example of a projection display device that requires countermeasures against cigarette smoke rather than dust, such as when used indoors in restaurants and the like.
- the noise is slightly larger than that of the projection display apparatus according to the fourth embodiment, the noise can be reduced as compared with the projection display apparatus according to the fifth embodiment.
- FIG. 3E is an exploded plan view showing a configuration of an LCD duct for sending cooling air to the LCD unit.
- the basic configuration of the sixth embodiment is the same as that of the fifth embodiment shown in FIG. 3D.
- a second air filter is provided in the intake passage of the G intake duct 70.
- the difference is that a certain G air filter 66 is not provided.
- the HEPA filter constituting the G air filter 66 has higher dust collection performance than a general air filter, but has high ventilation resistance. For this reason, for example, when used in an indoor environment such as a restaurant where it is not necessary to deal with dust, the projection display device does not need to include the G air filter 66, and the G air filter 66 can be omitted. Since the ventilation resistance of the intake path corresponding to the G optical path is reduced, the rotational speed of the G sirocco fan 79 in the G optical path can be reduced.
- This dust-proof structure using the air cooling system can prevent changes in the color temperature of the projected image and reduce noise from each fan.
- the intake duct and the intake louver corresponding to the R optical path also serve as the intake duct and the intake louver corresponding to the B optical path, and intake is performed in the R optical path and the B optical path.
- the duct and the intake louver are shared.
- the intake duct and intake louver corresponding to the R optical path also serve as the intake duct and intake louver corresponding to the G optical path.
- the only difference from the fourth to sixth embodiments is that the intake duct and the intake louver are shared by the R and G optical paths. Therefore, in the seventh to ninth embodiments, components other than the intake louver, air filter, intake duct, and sirocco fan are denoted by the same reference numerals as those in the fourth to sixth embodiments for convenience, and the description thereof is omitted. To do.
- the seventh example corresponds to the fourth example (FIG. 3C).
- the cooling air sucked by the RG sirocco fan 84 is sent to the R optical component and the G optical component in the optical engine via the RG intake louver 88 and the RB intake duct 90.
- Cooling air sucked by the B sirocco fan 83 is sent to the B optical component via the B intake louver 85 and the B intake duct 92.
- the RG intake duct 90 is provided with an RG air filter 86 as a second air filter and an RG air filter 87 as a first air filter.
- the B air intake duct 92 is provided with a B air filter 91 that is a second air filter.
- the RG intake louver 88 is detachably provided in the RG intake opening 89 of the housing.
- the eighth example corresponds to the fifth example (FIG. 3D).
- the basic configuration of the eighth embodiment is the same as the configuration of the seventh embodiment shown in FIG. 4B.
- the RB air that is the second air filter is provided in the B intake duct 92.
- the difference is that a filter 93 is provided. Since the structure of the RB air filter 93 is the same as that of the RB air filter 73, the description thereof is omitted.
- the ninth embodiment corresponds to the sixth embodiment (FIG. 3E).
- the basic configuration of the ninth embodiment is the same as the configuration of the seventh embodiment shown in FIG. 4B.
- RG air as a second air filter is connected to the RG intake duct 90.
- the difference is that the filter 86 is not provided.
- the arrangement of the air filter in the intake duct is the same as that of the fourth to sixth embodiments, but the amount of air passing through each optical path is different. That is, in the case where the seventh embodiment and the fourth embodiment are compared, the seventh embodiment having a small passing air volume can make the noise slightly smaller than that of the fourth embodiment. Similarly, in the case where the eighth embodiment and the fifth embodiment are compared, the eighth embodiment having a small passing air volume can make the noise slightly smaller than that of the fifth embodiment. Similarly, in the case where the ninth embodiment and the sixth embodiment are compared, the ninth embodiment having a small passing air volume has the effect of making the noise slightly smaller than that of the sixth embodiment.
- FIG. 5A shows the tenth embodiment and is an exploded plan view showing a configuration of an LCD duct for sending cooling air to the LCD unit.
- the filter detection means for the G air filter is used as a filter detection means for detecting whether or not the G air filter 41 and the B air filter 42 are mounted.
- a sensor 100 and a filter detection sensor 101 for the B air filter are provided.
- push-in type detection switches are used as the filter detection sensors 100 and 101.
- the cooling fan (sirocco fan) of the air filters 41 and 42 is installed.
- the rotation speed can be controlled. Therefore, a low-noise projection display device is realized without causing insufficient cooling of the LCDs 47, 48, and 49.
- FIG. 5B shows a case where only the G air filter 41 is installed in the GB intake duct 40
- FIG. 5C shows a case where only the B air filter 42 is installed in the GB intake duct 40
- FIG. 5D shows a case where both the G air filter 41 and the B air filter 42 are mounted in the GB intake duct 40.
- Table 1 shows the temperature of the outside air detected by the temperature sensor 38 and the number of rotations of each cooling fan corresponding to the presence / absence of the mounted state of the air filters 41 and 42 detected by the filter detection sensors 100 and 101, respectively.
- FIG. 6 is a flowchart showing an operation of controlling the rotation speed of the cooling fan in the projection display device.
- the projection display apparatus is operated from the non-volatile memory 27 of the main circuit board 31 as shown in display 1 in the outside air as shown in step S102.
- Information on the rotational speed of each fan corresponding to the temperature is read into the control circuit unit 28.
- the presence or absence of the air filters 41 and 42 is detected by the filter detection sensors 100 and 101 as shown in step S103, and then the temperature of the outside air is detected by the temperature sensor 38 as shown in step S104.
- the control circuit unit 28 sets the rotation speed of each cooling fan as shown in step S105. Control.
- step S106 it is detected whether or not the power of the projection display device is in the OFF state. If the power of the projection display device is not turned off, the process returns to step S103 where the filter detection sensors 100 and 101 detect again whether the air filters 41 and 41 are attached, and the power is turned off. If yes, the process proceeds to the end operation of the projection display device as shown in step S107.
- the cooling fan when any of the air filters 41 and 42 is removed from or installed in the GB intake duct 40 during the operation in which the projection display apparatus projects an image, the cooling fan The number of rotations can be automatically changed, and at the same time, it is possible to respond quickly to changes in the temperature of the outside air.
- the non-volatile memory 27 of the main circuit board 31 obtains information on the rotational speed of the cooling fan corresponding to the temperature of the outside air as shown in Table 1 from the control circuit unit 28. Is read. Next, whether or not the air filters 41 and 42 are attached is detected by the filter detection sensors 100 and 101, and the presence of the G air filter 41 in the GB intake duct 40 is detected. Subsequently, the temperature sensor 38 detects that the temperature of the outside air is 25 ° C., for example.
- the G air filter 41 is mounted as the air filter, and the temperature of the outside air is 25 ° C.
- the rotational speed of each fan is 4400 rpm for the G sirocco fan 36 (cooling fan for the G optical path in Table 1), 4200 rpm for the B sirocco fan 51 (cooling fan for the B optical path in Table 1), and the R sirocco fan 35 Is set to 3200 rpm, the light source fan is set to 4500 pm, and the exhaust fan 34 is set to 2500 rpm.
- Each fan is controlled by the control circuit unit 28 so that the rotational speed is maintained. If the projection display device is not turned off after 10 seconds, the filter detection sensors 100 and 101 detect again whether or not the air filters 41 and 42 are attached, and the temperature sensor 38. To detect the temperature of the outside air.
- the optimum number of rotations of the cooling fan is automatically set for the mounted state of each air filter 41, 42, and the optimization of the cooling of the LCD unit and the suppression of noise are achieved.
- the projection display device when the user installs appropriate air filters 41 and 42 in the GB intake duct 40 according to the installation environment, in order to properly cool the LCD unit.
- the number of rotations of the cooling fan as a necessary cooling condition is automatically set, and noise from the cooling fan is suppressed to the minimum necessary.
- the operational reliability of the projection display device is improved, the entire device is reduced in size and weight, and a low noise and dustproof environment adaptive projection display device is realized.
- the video generation device is not limited to an LCD, and can be applied to a display device using another video generation device such as DMD.
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Abstract
Description
赤、緑および青のそれぞれに対応する映像生成デバイスと、
映像生成デバイスのそれぞれに冷却用空気を吹き付けられるように配設された赤用風路、緑用風路および青用風路と、
赤用風路、緑用風路および青用風路のそれぞれに配置された第1のエアフィルタと、
緑用風路および青用風路の少なくとも一方の風路に配置された、フィルタの目が第1のエアフィルタよりも小さい第2のエアフィルタと、を有する。
図1Aから図2Dに、最良の形態である第1の実施例を示す。第1の実施例の投写型表示装置は、筐体の左側面と後方に吸気開口部を有する構成例である。
投写型表示装置は、その用途に応じて様々な環境に設置される。第1の実施例は、砂塵と、煙草の煙などが混在した劣悪な環境に設置される投写型表示装置であった。第2の実施例は、半屋外などで使用する場合に、砂塵への対策だけが必要な投写型表示装置の例であり、第1の実施例の投写型表示装置に比較して、各ファンによる騒音を低減することができる。ここで、半屋外とは、例えば中庭のように、屋根があっても、空間の全部が壁に囲まれておらず、少なくとも空間の一方が外部に面している空間を指している。図2Fは、冷却風をLCD部に送り込むLCDダクトの構成を示す分解平面図である。
第1の実施例は、砂塵と、煙草の煙などが混在した劣悪な環境に設置される投写型表示装置の例であり、第2の実施例は、半屋外などで使用する場合に砂塵への対策が特に必要である投写型表示装置の例であった。
図3Aから図3Cは、第4の実施例である。第4の実施例は、筐体の左側面の2箇所に吸気開口部を有する投写型表示装置の例である。図3Aは、筐体の吸気開口部からG吸気ルーバー68を取り外し、エアフィルタを分解して示す斜視図である。
第4の実施例は、半屋外などで使用される場合に砂塵への対策だけが必要である投写型表示装置の例であった。第5の実施例は、砂塵と、煙草の煙などが混在した劣悪な環境に設置される投写型表示装置の例である。
<第6の実施例>
上述したように、第4の実施例は、半屋外など砂塵への対策だけが必要である投写型表示装置の例であり、第5の実施例は、砂塵と、煙草の煙などが混在した劣悪な環境に設置される投写型表示装置の例であった。第6の実施例は、例えば飲食店などの室内で使用される場合のように、砂塵よりも煙草の煙(ヤニ)への対策が必要である投写型表示装置の例である。騒音に関しては、第4の実施例の投写型表示装置よりもやや大きくなるが、第5の実施例の投写型表示装置よりも騒音を低減することができる。
上述した第4~第6の実施例では、R用光路に対応する吸気ダクトおよび吸気ルーバーが、B用光路に対応する吸気ダクトおよび吸気ルーバーを兼ねており、R用光路とB用光路で吸気ダクトおよび吸気ルーバーが共通にされた構成例であった。
図5Aは、第10の実施例を示しており、冷却風をLCD部に送り込むLCDダクトの構成を示す分解平面図である。第10の実施例は、第1の実施例と同じ構成において、Gエアフィルタ41とBエアフィルタ42の装着状態の有無をそれぞれ検出するために、フィルタ検出手段として、Gエアフィルタ用のフィルタ検出センサ100とBエアフィルタ用のフィルタ検出センサ101を備えている。フィルタ検出センサ100,101としては、押し込み型の検出スイッチが用いられている。
Claims (13)
- 赤、緑および青のそれぞれに対応する映像生成デバイスと、
前記映像生成デバイスのそれぞれに冷却用空気を吹き付けられるように配設された赤用風路、緑用風路および青用風路と、
前記赤用風路、前記緑用風路および前記青用風路のそれぞれに配置された第1のエアフィルタと、
前記緑用風路および前記青用風路の少なくとも一方の風路に配置された、フィルタの目が前記第1のエアフィルタよりも小さい第2のエアフィルタと、
を有する、映像生成デバイスの防塵構造。 - 請求の範囲第1項に記載の映像生成デバイスの防塵構造において、
前記第2のエアフィルタは、前記第1のエアフィルタと前記映像生成デバイスとの間に配置されている、映像生成デバイスの防塵構造。 - 請求の範囲第2項に記載の映像生成デバイスの防塵構造において、
前記冷却用空気を前記第1および第2のエアフィルタの側から吸い込み前記映像生成デバイスの側へ吐出する第1の冷却ファン、および前記冷却用空気を前記第1のエアフィルタの側から吸い込み前記映像生成デバイスの側へ吐出する第2の冷却ファンをさらに有する、映像生成デバイスの防塵構造。 - 請求の範囲第1項に記載の映像生成デバイスの防塵構造において、
前記青用風路の吸気開口部は前記赤用風路および前記緑用風路の吸気開口部と独立して設けられており、
前記赤用風路と前記緑用風路の吸気開口部が一つの開口として一体化されている、映像生成デバイスの防塵構造。 - 請求の範囲第1項に記載の映像生成デバイスの防塵構造において、
前記緑用風路の吸気開口部は前記赤用風路および前記青用風路の吸気開口部と独立して設けられており、
前記赤用風路と前記青用風路の吸気開口部が一つの開口として一体化されている、映像生成デバイスの防塵構造。 - 請求の範囲第1項に記載の映像生成デバイスの防塵構造において、
前記第2のエアフィルタが前記緑用風路および前記青用風路にそれぞれ配置された構成において、前記第2のエアフィルタのうち、前記青用風路に配置された青用のエアフィルタは、フィルタの目が前記緑用風路に配置された緑用のエアフィルタよりも小さい、映像生成デバイスの防塵構造。 - 請求の範囲第6項に記載の映像生成デバイスの防塵構造において、
前記緑用風路に設けられた前記第2のエアフィルタは、HEPAフィルタを折り返して構成され、
前記青用風路に設けられた前記第2のエアフィルタは、ULPAフィルタを折り返して構成された部分と、活性炭が充填された部分とが前記冷却用空気の通風方向に沿って配置されて構成されている、映像生成デバイスの防塵構造。 - 請求項の範囲第1項に記載の映像生成デバイスの防塵構造において、
前記青用風路、前記赤用風路および前記緑用風路の吸気開口部に着脱可能に設けられたルーバー部材と、をさらに有し、
前記第1および第2のエアフィルタは、前記ルーバー部材が前記吸気開口部から取り外されることによって、前記赤用風路、前記緑用風路、および前記青用風路から取り外すことが可能に構成されている、映像生成デバイスの防塵構造。 - 請求の範囲第3項に記載の映像生成デバイスの防塵構造を備える投写型表示装置。
- 請求の範囲第9項に記載の投写型表示装置において、
前記緑用風路と前記青用風路における前記第2のエアフィルタの有無を検出するためのフィルタ検出手段と、
前記フィルタ検出手段による検出結果に基づいて、前記緑用風路および前記青用風路における前記第2のエアフィルタの有無の状態にそれぞれ対応する所定の回転数になるように前記冷却ファンを制御する制御手段と、
を備える投写型表示装置。 - 請求の範囲第9項に記載の投写型表示装置において、
前記冷却用空気の温度を検出する温度検出手段と、
前記温度検出手段による検出結果に基づいて、前記冷却用空気の温度に対応する所定の回転数になるように前記冷却ファンを制御する制御手段と、
を備える投写型表示装置。 - 請求の範囲第10項に記載の投写型表示装置において、
前記映像生成デバイスに光を照射する光源と、
前記光源を冷却するための光源用ファンと、
前記冷却用空気を筐体の外部に排気するための排気ファンと、を備え、
前記制御手段は、前記フィルタ検出手段による検出結果に基づいて、前記緑用風路と前記青用風路における前記第2のエアフィルタの有無の状態にそれぞれ対応する所定の回転数になるように前記光源用ファンおよび前記排気ファンをそれぞれ制御する、投写型表示装置。 - 請求の範囲第10項に記載の投写型表示装置において、
前記投写型表示装置が映像を投写している状態で、前記制御手段は、前記第2のエアフィルタが前記緑用風路および前記青用風路に対して着脱されたときに前記冷却ファンの回転数を制御する、投写型表示装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/138,680 US9118847B2 (en) | 2009-03-24 | 2009-03-24 | Dustproof structure of image generation device, and projection display device |
CN200980158286.3A CN102362221B (zh) | 2009-03-24 | 2009-03-24 | 图像产生装置的防尘结构和投影显示装置 |
PCT/JP2009/055824 WO2010109595A1 (ja) | 2009-03-24 | 2009-03-24 | 映像生成デバイスの防塵構造、および投写型表示装置 |
JP2011505706A JP4784901B2 (ja) | 2009-03-24 | 2009-03-24 | 映像生成デバイスの防塵構造、および投写型表示装置 |
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PCT/JP2009/055824 WO2010109595A1 (ja) | 2009-03-24 | 2009-03-24 | 映像生成デバイスの防塵構造、および投写型表示装置 |
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US (1) | US9118847B2 (ja) |
JP (1) | JP4784901B2 (ja) |
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Cited By (2)
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WO2012046309A1 (ja) * | 2010-10-06 | 2012-04-12 | Necディスプレイソリューションズ株式会社 | 粉塵除去装置 |
JP2015222305A (ja) * | 2014-05-22 | 2015-12-10 | カシオ計算機株式会社 | 画像投影装置 |
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JP2011237725A (ja) * | 2010-05-13 | 2011-11-24 | Sanyo Electric Co Ltd | 投写型表示装置 |
JP5643030B2 (ja) * | 2010-08-30 | 2014-12-17 | 三洋電機株式会社 | 投写型表示装置 |
CN103197495B (zh) * | 2012-01-04 | 2015-06-10 | 中强光电股份有限公司 | 气体过滤模块及投影装置 |
JP2014209183A (ja) * | 2013-03-27 | 2014-11-06 | セイコーエプソン株式会社 | エアフィルター及びプロジェクター |
US9897328B2 (en) * | 2013-05-02 | 2018-02-20 | William B. McEvoy | Tabletop cooking assembly |
JP6482115B2 (ja) * | 2014-12-25 | 2019-03-13 | キヤノンファインテックニスカ株式会社 | 画像読取装置における送風機構及び画像読取装置 |
FR3039943B1 (fr) * | 2015-08-03 | 2017-09-01 | Aledia | Circuit optoelectronique a diodes electroluminescentes |
JP7227785B2 (ja) * | 2019-02-18 | 2023-02-22 | キヤノン株式会社 | 画像処理装置、画像処理方法およびコンピュータプログラム |
US11454402B1 (en) | 2021-12-01 | 2022-09-27 | Mcevoy William B | Tabletop cooking assembly |
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Also Published As
Publication number | Publication date |
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CN102362221B (zh) | 2014-08-06 |
US9118847B2 (en) | 2015-08-25 |
CN102362221A (zh) | 2012-02-22 |
US20120008100A1 (en) | 2012-01-12 |
JP4784901B2 (ja) | 2011-10-05 |
JPWO2010109595A1 (ja) | 2012-09-20 |
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