JPH08101457A - Projector device - Google Patents

Abstract

PURPOSE: To excellently cool a picture display means while preventing dust from adhering thereto by including the picture display means in an air passage where other parts except an intake port and an exhaust port are hermetically sealed and allowing air to pass through an air filter on an air intake side through the intake port so that the air is allowed to flow in and discharged by means of a fan device. CONSTITUTION: This device is provided with the air passage where the picture display means 10 to 12 and 16 are included and disposed, which has the intake port 26 and the exhaust port 20 opened to an outward side, and where other parts except the intake port 26 and the exhaust port 20 are hermetically sealed. Then, the air filter on the air intake side 27 through which flowing air is caused to pass near the intake port 26 and the fan device 17 which causes the air to flow in the air passage through the intake port 26 and discharges it to the outward side through the exhaust port 20 are installed in the air passage. Also, an air filter on an exhaust side 29 is installed near the exhaust port 20 in the air passage. Then, the device is provided with a projection lens projecting pictures displayed by the picture display means 10 to 12 and 16 to the outward side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device for enlarging and projecting an image displayed by an image display means such as an LCD (liquid crystal display) panel on a screen.

[0002]

2. Description of the Related Art Conventionally, a projector device has been proposed which is configured to use an LCD (liquid crystal display) panel as an image display means and to magnify and project an image displayed by the LCD panel on a screen by a projection lens. ing.

In such a projector device,
The LCD panel is arranged in the outer housing so as to be on the focal plane of the projection lens, and is illuminated by a lamp such as a metal halide lamp.

In such a projector device, since the LCD panel is illuminated by the lamp, the LCD panel and polarizing filters arranged in front of and behind the LCD panel, in particular, polarized light on the illumination light incident side. The filter is heated. That is, the LCD panel and the polarization filter are self-heated due to the radiation heat from the lamp and the self-heating due to the absorption of the polarization component in the anti-transmission axis direction.
Heated.

Therefore, in this projector device, the LCD panel and the polarization filter are cooled by a so-called axial fan (propeller type fan). That is, the axial fan allows the air on the outer side of the outer casing to flow into the outer casing, and allows the air to pass near the LCD panel and the polarization filter, whereby the LCD panel and the Allow the polarizing filter to cool.

[0006]

By the way, the axial flow fan (propeller type fan) has a low static pressure and a sufficient flow rate resistance to allow a sufficient amount of air to flow into the outer housing. Disappear.

Therefore, in the projector device, a coarse net is provided at the air inlet provided at a position facing the axial fan of the outer casing, and the net is provided near the LCD panel and the polarizing filter. In order for the sent air to be easily discharged to the outer side of the outer casing, it is sufficient to prevent passage resistance in the portion of the outer casing in the vicinity of the LCD panel and the polarization filter. A large opening will be provided.

Therefore, in this projector device, air sent near the LCD panel and the polarization filter is highly likely to flow into the outer casing while containing dust, and the axial fan is also provided. When is stopped, there is a risk that dust may enter through the opening for releasing air from the inside of the outer casing.

When dust adheres to the LCD panel or the polarizing filter, the shadow of the dust is generated in the projected image, which causes deterioration of the image quality of this image.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and it is possible to reliably prevent dust from adhering to an image display means such as an LCD panel and to improve the image display means. It is an object of the present invention to provide a projector device that can be cooled.

[0011]

In order to solve the above-mentioned problems and achieve the above-mentioned object, a projector device according to the present invention is provided with an image display means and an image display means provided on the outside. An air flow path having an open intake port and an exhaust port and the other parts of the intake port and the exhaust port being in a hermetically sealed state, and being disposed in the air flow channel near the intake port. An intake side air filter through which the air flowing into the air flow path through the intake port passes, and an air inside the air flow path that causes the outside air to flow into the air flow path through the intake port And a projection lens for projecting an image displayed by the image display means toward the outside.

In the project apparatus according to the present invention, the exhaust side is located in the air flow path in the vicinity of the exhaust port, through which air exhausted from the air flow path passes through the exhaust port. An air filter is provided.

[0013]

In the projector device according to the present invention, the image display means has an intake port and an exhaust port opened to the outside, and the other parts of the intake port and the exhaust port are hermetically sealed. The fan device is housed in the passage, and the fan device allows the air on the outer side to flow into the air passage through the intake port and to flow the air in the air passage through the exhaust port. By discharging to the outside, it is cooled by the dust-free air.

Further, in the project apparatus, an exhaust side air filter is provided which is located in the air flow path in the vicinity of the exhaust port and through which air exhausted from the air flow path passes through the exhaust port. In this case, in the air flow passage,
The air passage and each of the air filters are substantially sealed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

The projector apparatus according to the present invention has a chassis box 4 as shown in FIGS. The chassis box 4 is formed into a substantially rectangular parallelepiped housing.

On the top plate 2 of the chassis box 4,
The hanger member 1 is attached. The chassis box 4 is suspended and supported by the ceiling 21 via the hanger member 1. In addition, this chassis box 4
Is covered with a cover 23 attached to the ceiling 21, as shown in FIG.

Inside the chassis box 4, a lamp house 3 is housed and disposed on the rear side. As shown in FIG. 5, the lamp house 3 is formed in a housing shape in which the front side is opened, and houses the metal halide lamp 31. The lamp house 3 has a plurality of through holes so that air can flow in and out of the lamp house 3. A concave reflecting mirror 32 is arranged on the rear side of the metal halide lamp 31. The light emitted from the metal halide lamp 31 is reflected by the concave reflecting mirror 32 and emitted to the front side of the lamp house 3.

On the upper side of the lamp house 3,
An exhaust fan 24 is provided. This exhaust fan 24
Is a coaxial fan (propeller type fan), and
As indicated by the middle arrow I, the air in the lamp house 3 is discharged to the upper side of the lamp house 3 through the through hole of the lamp house 3.

The luminous flux emitted from the lamp house 3 passes through a condenser lens (not shown), and as shown in FIG. 2, the first dichroic mirror 5 serving as a color separation mirror R (red color) in the chassis box 4. ) And G (green) and B (blue). The R (red) and G (green) light beams that have been color-separated by the first dichroic mirror 5 are incident on the second dichroic mirror 8 via the first pre-polarization filter 6. In addition, the B (blue) light beam color-separated by the first dichroic mirror 5 passes through the second pre-polarization filter 7 and enters the optical path of this light beam by 45 degrees.
It is incident on the mirror 9 arranged at an angle of °.

The light beam incident on the second dichroic mirror 8 is color-separated into two light beams of R (red) and G (green). The light fluxes separated in color by the second dichroic mirror 8 are first and second LCD (liquid crystal display) panels 10 and 11 serving as image display means.
Is incident in response to. The light flux incident on the mirror 9 has its optical path deflected and is incident on the third LCD panel 12 serving as an image display unit.

In this way, the luminous flux incident on the first LCD panel 10 passes through the dichroic mirrors 5 and 8 to generate R (red), G (green) and B.
It is the light flux of the first color (R (red)) of (blue). In addition, the light flux incident on the second LCD panel 11 passes through the dichroic mirrors 5 and 8 so that the second color of R (red), G (green), and B (blue) ( The luminous flux is G (green). Then, the luminous flux incident on the third LCD panel 12 is
By going through the first dichroic mirror 5,
It is the light flux of the third color (B (blue)) of R (red), G (green), and B (blue).

As shown in FIG. 1, incident side polarization filters 16 are provided on the luminous flux incident sides of the LCD panels 10, 11 and 12, respectively. These incident side polarization filters 16 and LCs corresponding to these incident side polarization filters 16
3 mm to 5 m between D panel 10, 11, 12
A void of about m is formed.

The incident-side polarization filters 16 cooperate with the pre-polarization filters 6 and 7 to make the light beams incident on the LCD panels 10, 11 and 12 into a linearly polarized state. In this projector device,
Since the action of making the light fluxes incident on the panels 10, 11, 12 into the linearly polarized state is dispersed in the pre-polarization filters 6 and 7 and the incident-side polarization filters 16, the pre-polarization filters 6 and 6 are dispersed. 7 and the temperature rises of the respective incident side polarization filters 16 are suppressed.

In addition, each of the LCD panels 10, 11, 1 described above
Emission-side polarization filters (not shown) are respectively arranged on the light-emission side of the two light fluxes. These emission side polarization filters are LCD panels 1 corresponding to the emission side polarization filters.
It is attached to the main surface portions of the luminous flux exit sides of 0, 11, and 12.

The luminous fluxes emitted from the LCD panels 10, 11 and 12 are incident on the combining prism 13. The three light beams incident on the combining prism 13 are combined with each other to form one light beam. The light fluxes synthesized by the synthesis prism 13 enter a projection lens 14 arranged in the front portion of the chassis box 4.

The projection lens 14 has a lens barrel and a plurality of lenses 15 arranged in the lens barrel. The lens barrel is made to penetrate the front plate portion of the chassis box 4. Are arranged.

The projection lens 15 projects the incident light beam on a screen (not shown) arranged in front of the projector device. The projection lens 15 has a rear focal plane in the vicinity of the image display surface portion of each of the LCD panels 10, 11 and 12, and the LCD panel 1
The image in which the images displayed by 0, 11, and 12 are combined is enlarged and projected on the screen.

As shown in FIGS. 1 and 4, this projector device includes the LCD panels 10, 11,
12 and an air flow passage tube 28 forming an air flow passage for cooling each of the polarization filters 16 described above. The air passage cylinder 28 is formed in a cylinder shape having a substantially rectangular cross section, and is arranged so as to include the LCD panels 10, 11 and 12 therein. That is, the air flow tube 28 includes the introduction tube portion 18 that extends horizontally above the synthetic prism 13,
Each of the above LCDs is hung downward from the introduction tube portion 18
The duct portion 19 corresponding to each LCD panel 10, 11, 12 facing the upper side of the panel 10, 11, 12 and each L
It has an exhaust port 20 corresponding to each of the LCD panels 10, 11 and 12 which is provided on the lower side of the CD panels 10, 11 and 12.

The LCDs of the air passage cylinder 28 are each described above.
As described above, the portion including the panels 10, 11 and 12 is capable of horizontally injecting the light flux into the LCD panels 10, 11 and 12 and horizontally emitting the light flux from the LCD panels 10, 11 and 12. Has become.

At the front end of the introduction tube portion 18,
The air discharge part of the intake fan device 17 is joined. The intake fan device 17 is configured to have a substantially circular can-shaped housing portion and a sirocco fan (centrifugal fan) housed in the housing portion and rotated. The air discharge portion of the intake fan device 17 is an opening formed on the side surface of the casing. And this intake fan device 17 is
An air suction section 30 is provided at the center of the bottom surface of the housing section. The air suction portion 30 is an opening portion formed in the housing portion and corresponds to the central portion of the sirocco fan. To the air intake portion 30 of the intake fan device 17, a base end portion of an intake cylinder portion 25 forming a part of the air flow passage cylinder 28 is joined. This intake cylinder portion 25 is
The front end side is bent toward the front side inside the chassis box 4, and the front end portion serves as an intake port 26. The intake port 26 is exposed to the outside on the front side through a mesh-shaped through hole formed on the front surface of the chassis box 4.

That is, the air passage cylinder 28 has the intake port 26 and the exhaust port 20 which are open to the outside, and the other parts of the intake port 26 and the exhaust port 20 are in a hermetically sealed state. .

An intake side air filter 27 is disposed in the intake cylinder portion 25 in the vicinity of the intake port 26. The intake side air filter 27 is for passing the air flowing into the air flow path cylinder 28 through the intake port 26, and removes dust in the air. Further, an exhaust side air filter 29 is arranged in the vicinity of the exhaust port 20 in the air flow pipe 28. The exhaust side air filter 29 is for passing the air flowing out of the air flow channel cylinder 28 through the exhaust port 20, and removes dust in the air.

The intake fan device 17 has an arrow A in FIG.
And as indicated by an arrow B, the air on the outer side is caused to flow into the air passage pipe 28 through the intake port 26, and as shown by an arrow F in FIG. The air inside is discharged to the outside through the exhaust port 20.

In the air passage cylinder 28, the air discharged from the intake fan device 17 passes through the introduction cylinder portion 18 and inside each of the duct portions 19 as shown by arrows C and D in FIG. Flow into. The air that has flowed into the duct portion 19 is, as indicated by an arrow E in FIG.
It reaches the exhaust port 20 through the vicinity of the D panels 10, 11, 12 and the incident side polarization filter 16.

As described above, each of the LCD panels 10 and 1
1, 12 and the air flowing in the vicinity of the incident side polarization filter 16 receives heat from the LCD panels 10, 11, 12 and the incident side polarization filter 16 and is heated, whereby the LCD panel 10, 11 is heated. , 12 and the incident side polarization filter 16 are cooled. The above LCDs
Panels 10, 11, 12 and the incident side polarization filter 16
The air also passes through the space between and, so that the incident side polarization filter 16 that is particularly heated can be cooled well.

Since the intake port 26 and the exhaust port 20 are closed by the intake side air filter 27 and the exhaust side air filter 29, respectively, the inside of the air flow pipe 28 is protected against dust. Is hermetically sealed, regardless of whether the intake fan device 17 is operating or not,
Ingress of dust is prevented.

The rear upper surface of the chassis box 4 is located above the lamp house 3, that is, above the exhaust fan 24, and has an air vent opening upward. 33 is formed.

A through hole 22 is formed in the ceiling 21 corresponding to the ventilation port 33. That is, the ventilation port 33 faces the upper side of the ceiling 21 through the through hole 22.

A grill member 34 is attached to the chassis box 4 so as to correspond to the ventilation port 33, that is, to close the ventilation port 33. As shown in FIGS. 5 and 6, the grill member 34 is formed in a substantially flat plate shape having a plurality of slit-shaped openings 35.

A plurality of louver members 36 are provided on the lower surface of the grill member 34 so as to face the inner side of the ventilation port 33 and correspond to the openings 35. Each of the louver members 36 is formed of a material such as a metal plate and has a substantially rectangular shape. One side edge portion is joined to the grill member 34 and the other side edge portion is separated from the grill member 34. , The openings 3 corresponding to the openings 35
5 are arranged in parallel.

The louver members 36 are located immediately below the corresponding openings 35. That is, the other side edge portion of each louver member 36 and the edge portion of the opening portion 35 corresponding to the louver member 36 overlap in the vertical direction as indicated by an arrow G in FIG.

Further, each louver member 36 has a liquid reservoir concave portion 37 at the other side edge portion separated from the grill member 34. The liquid reservoir concave portion 37 is formed by bending the other side edge portion of each of the louver members 36 upward at a substantially right angle.

Both ends of these louver members 36 are located on the outer side of the ventilation port 33 with respect to the edges on both sides of the ventilation port 33.

In the chassis box 4 having the grill member 34 and the louver member 36, the air discharged from the air flow passage cylinder 28 through the exhaust port 20 passes through the ventilation port 33. It is discharged to the outside of the chassis box 4, and passes through the inside of the lamp house 3 through the exhaust fan 24 and the ventilation port 33, as shown by arrows F, H and I in FIG. It is discharged to the outside of the chassis box 4.

At this time, the louver member 36 does not hinder the flow of air through the openings 35. The louver members 36 collect the water droplets, which enter the openings 35 from the upper side of the ceiling 21 in the liquid reservoir concave portions 37, as shown by arrows J in FIG. 38 above chassis box 4
Prevent invasion.

The water droplets thus accumulated in the liquid reservoir recess 37 are evaporated by the heat of the air discharged through the opening 35, or flow in the liquid reservoir recess 37. It is discharged from the liquid reservoir concave portion 37.

In this way, when the water drops 38 flow in the liquid reservoir concave portion 37 and are discharged from the liquid reservoir concave portion 37, both end portions of each louver member 36 have edges on both sides of the ventilation port 33. Since the water droplet 38 is located on the outer side of the ventilation port 33 than the portion, the water droplet 38 will flow down to the outer side of the ventilation port 33 and will not enter the ventilation port 33.

[0049]

As described above, in the projector device according to the present invention, the image display means has the intake port and the exhaust port opened to the outside, and the other parts of the intake port and the exhaust port are It is contained in the air flow path that is hermetically sealed.

Therefore, in this projector device, the fan device causes the air on the outer side to flow into the air flow path through the intake port so as to flow through the air filter on the intake side to allow the air in the air flow path to flow. By discharging to the outside through the exhaust port, the image display means can be cooled by the dust-free air.

Further, in the project apparatus, an exhaust side air filter may be provided in the air passage near the exhaust port and through which air exhausted from the air passage passes through the exhaust port. The inside of the air flow passage can be substantially sealed by the air flow passage and the air filters.

That is, the present invention provides a projector device capable of satisfactorily cooling the image display means while reliably preventing dust from adhering to the image display means such as an LCD panel. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a side view showing a partially broken structure of a projector device according to the present invention.

FIG. 2 is a bottom view showing the structure of the projector device with a part thereof cut away.

FIG. 3 is a front view showing the configuration of the projector device.

FIG. 4 is a side view showing a partially cutaway view of a structure of an air flow path of the projector device.

FIG. 5 is a longitudinal cross-sectional view of a main part showing a configuration in the vicinity of a ventilation port of the projector device.

FIG. 6 is a partially cutaway perspective view showing a configuration of a grill member arranged corresponding to the ventilation port.

[Explanation of symbols]

 10 First LCD Panel 11 Second LCD Panel 12 Third LCD Panel 14 Projection Lens 17 Intake Fan 16 Polarizing Filter 18 Introducing Tube Section 19 Duct Section 20 Exhaust Port 24 Exhaust Fan 25 Intake Tube Section 26 Intake Port 27 Intake Side Air filter 28 Air flow tube 29 Exhaust air filter

Claims (2)

[Claims] 1. An image display means and an intake port and an exhaust port, which are arranged so as to include the image display means and are open to the outside, and the other parts of the intake port and the exhaust port are hermetically sealed. An air flow path that is in a state, and is disposed in the air flow path in the vicinity of the intake port,
An intake side air filter through which the air flowing into the air flow path passes through the intake port, and an outside air flows into the air flow path through the intake port, A projector device provided with a fan device for discharging the air of the above to the outside through the exhaust port, and a projection lens for projecting the image displayed by the image display means toward the outside. 2. An exhaust side air filter, which is disposed in the air flow path near the exhaust port and through which air exhausted from the air flow path passes through the exhaust port. The described projector device.