JPH11119181A - Cooling structure of projection type liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling performance and to make the device small- sized by sending air by an air distributing means to a liquid crystal panel unit part, a light source lamp unit, and a power unit part. SOLUTION: A flow of cooling air from a cooling fan 101 is taken in the device through an air filter provided at an outside air intake provided to an outer package case 7. Further, the liquid crystal panel unit 3, power unit 6, and power lamp unit 1 are distributed to the air outlet of the cooling fan 101 and an air delivery pipe 102 for guiding the cooling air is added; and the discharge air of the cooling fan 101 is distributed to 2 places and the cooling air is distributed and sent to the liquid crystal panel unit 3, power unit 6, and power lamp unit 1 to cooling the device. Further, the cooling air which is distributed and sent after passing through the cooled parts of the respective units is discharged to outside the device from an air discharge hole provided above the air passage parts of the respective units through natural convection and the static pressure of the cooling fan 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention decomposes white light from a light source lamp into three color lights of red, blue and green, and makes each of these lights correspond to image information through a light valve composed of a liquid crystal panel. The present invention relates to a cooling structure of a projection-type liquid crystal display device that modulates, modulates, modulates, and modulates light of each color, and enlarges and projects the modulated light on a screen via a projection lens unit.

Further, the present invention relates to a cooling structure for efficiently cooling the liquid crystal panel unit, the power supply unit and the light source lamp unit of the projection type liquid crystal display device which require cooling.

[0003] The present invention also relates to a cooling structure for greatly reducing the noise caused by a cooling fan and significantly improving the quality of products.

[0004] The present invention also relates to a cooling structure which can use a small-sized cooling fan because the cooling efficiency is greatly improved, and can greatly reduce the size of the entire apparatus.

[0005]

2. Description of the Related Art Recently, high-resolution liquid crystal panels have been used in projection-type liquid crystal display devices in order to project image information more clearly, and furthermore, brighter and higher-luminance projection screens have been promoted. In addition, due to the spread of personal computers and the like, electronic presentations are often used, and there is a strong demand for a projection type liquid crystal display device to have a small size and light weight with excellent portability as an image output device such as a notebook personal computer.

For this reason, the rated input power of the light source lamp also increases with the increase in brightness, and the cooling performance of the optical element components and the like is an important issue. There is also a strong demand for a compact structure.

FIG. 8 is a plan view showing an outline of a cooling structure of a conventional projection type liquid crystal display device. A cooling structure of a conventional projection type liquid crystal display device will be described with reference to the drawings.

In FIG. 8, reference numeral 1 denotes a light source lamp unit, 2 denotes white light from the light source lamp unit 1 in red,
This is an irradiation optical unit that separates the colors into blue and green, and collects the separated lights. Reference numeral 3 denotes a liquid crystal panel unit that modulates the light condensed by the irradiation optical unit 2 in accordance with image information, and a color combining optical unit that performs color combination of the modulated light with a light valve that includes the liquid crystal panel unit 3. 4 form image information. Further, a projection optical unit 5 for enlarging and projecting the light combined by the color combining optical unit 4.
To enlarge and project the image on the screen. In addition, the power supply unit 6 includes a power supply unit 6 serving as a driving source for driving a light source lamp unit and an electric device, and a signal processing circuit (not shown).

In this type of projection type liquid crystal display device, self-heating of the light source lamp unit 1 having a strong light output and temperature rise of optical element parts such as the liquid crystal panel unit 3 into which light emitted from the light source lamp unit 1 is incident. And power supply unit 6
Generally, forced cooling is necessary for heat generation due to the loss of each device, etc., and each cooling using multiple cooling fans etc. corresponding to the cooling block for light source lamp, liquid crystal panel unit or power supply unit The device is installed.

FIG. 9 shows a cooling structure of a liquid crystal panel unit of a conventional projection type liquid crystal display device. The conventional cooling structure of a liquid crystal panel will be described with reference to the drawings. In FIG. 9, the optical base 8 is fixed to the outer case 7 of the device, and the irradiation optical unit 2 is mounted on the optical base 8 while being positioned. The liquid crystal panel unit 3 is integrally engaged with the color synthesizing optical unit 4 with a liquid crystal panel mounting bracket 9 and is mounted on the optical base 8. The projection optical unit 5 is fixed to the optical base 8. The cooling fan 10 for cooling the liquid crystal panel unit 3 is mounted on the optical base 8 on the side opposite to the mounting surface of the liquid crystal panel unit 3, that is, on the back side.

Here, the optical base 8 is provided with openings 11 which serve as three ventilation passages for red, green and blue, respectively, for guiding the cooling air of the cooling fan 10 for the liquid crystal panel to the liquid crystal panel unit 3. In order to send cooling air necessary for cooling the three liquid crystal panel units 3, three openings 11 are provided.
An air chamber called an air chamber 12 is provided between the cooling fan 10 and the cooling fan 10 for a liquid crystal panel.

FIG. 10 is an explanatory view of the cooling structure of the light source lamp unit 1. First, the cooling structure of the light source lamp unit 1 will be described with reference to the drawings. In this figure, reference numeral 13 denotes a cooling fan for a light source lamp for appropriately cooling a high-temperature portion of the light source lamp unit 1 and adjusting the temperature by sucking and ventilating high-temperature air around the light source lamp unit 1. The light source lamp box 14 is arranged on the upstream side of the airflow by the light source lamp cooling fan 13 and holds the light source lamp unit 1. The light source lamp box 14 is provided with a louver-shaped air outlet for discharging air in a high-temperature atmosphere around the light source lamp unit 1 sucked from the light source lamp cooling fan 13 to the outside of the apparatus. A passage that becomes one path 4 is formed integrally.

When the inside of the light source lamp box 14 is made to have a negative pressure by the light source lamp cooling fan 13, air flows upstream along the bulb or the reflector portion of the light source lamp unit 1. Is formed. The light source lamp housing member 16 has a guide portion that can be detachably held so that the light source lamp box 14 can be exchanged and managed, and is positioned and fixed to the outer case 7 or the irradiation optical unit 2 of the apparatus. The light source lamp housing member 16 is provided with a positioning mechanism (not shown) that enables the light beam emitted from the light source lamp unit 1 to be positioned on a predetermined optical axis.

The light source lamp accommodating member 16 has a louver-shaped first path 15 for air flow of the light source lamp box 14.
And a second path 17 for airflow having a louver shape symmetrical to the light source lamp box 14 is integrally formed with the light source lamp box 14. Further, the light source lamp housing member 16 passes through the air inlet on the upstream side of the light source lamp box 14 and the air inlet on the upstream side so that air is introduced into the reflector portion of the light source lamp unit 1. Are formed. First air of the light source lamp box 14 and the light source lamp housing member 16
The louver shape of the path 15 and the second path 17 is such that the light source lamp unit 1 is
The projections have a symmetrical light-shielding louver shape that has a closed shape so as to have a light-shielding property so that unnecessary light flux does not leak to the side opposite to the light exit side.

The high-temperature atmosphere air sucked in by the cooling fan 13 for the light source lamp is exhausted from the exterior case 7, that is, the device, by the exhaust port 18 arranged in the air discharge direction of the cooling fan 13 for the light source lamp of the exterior case 7. It is exhausted to the outside.

Next, a conventional cooling structure of the power supply unit 6 will be described with reference to FIG. In FIG. 8, the power supply unit 6 is housed in the power supply unit case 21 and fixed to the outer case 7. Reference numeral 19 denotes a power supply unit cooling fan fixed to one end surface of the power supply unit case 21. Further, the power supply unit cooling fan 19 draws in air inside the device outside the power supply unit case, guides the air to the inside of the power supply unit case 21, and self-heats due to power loss inside the power supply unit 6. It is configured to forcibly blow and cool the electric device. In the power supply unit case 21, an opening 20 for discharging the forced air flow of the power supply unit cooling fan 19 is provided on a straight line connecting the vicinity of the light source lamp cooling fan 13 and the cooling portion. The airflow discharged to the outside of the power supply unit case after convection inside the power supply unit case is exhausted to the outside of the apparatus by the cooling fan 13 for the light source lamp.

Here, the cooling mechanism of the conventional cooling structure of the projection type liquid crystal display device will be briefly described.

First, the cooling mechanism of the cooling structure of the liquid crystal panel unit will be described. FIG. 9 shows a cross-sectional view of the cooling structure of the liquid crystal panel unit. The flow of cooling air from the cooling fan 10 for the liquid crystal panel described above draws in outside air from the bottom of the device through an intake filter 22 provided on the lower surface of the outer case, and flows in the direction of the three liquid crystal panel units 3, that is, in the direction of arrow A. The air is flowing. The air discharged from the liquid crystal panel cooling fan 10 is supplied to the air chamber 2.
3, the cooling air is guided to the liquid crystal panel unit 3 through the three openings 11 of the optical base 8 assuming that the temperature is substantially uniform, and the temperature, which is the incident portion of light from the light source lamp of the liquid crystal panel unit 3, is obtained. It is forcibly applied to the heat-generating part, and forced air cooling is performed.

Next, a cooling mechanism of the cooling structure of the light source lamp unit will be described. Here, the light source lamp box 14 and the light source lamp housing member 1
6, air flows in from the air inlet through the light source lamp cooling fan 13, cools the reflector portion of the light source lamp unit 1 and the like, and is then exhausted to the outside of the exterior case 7. As the flow of the air, the outside air sucked by the cooling fan 10 for the liquid crystal panel from the ventilation port of the exterior case 7 (not shown)
In addition, the air is sucked in from the air inlet provided in the light source lamp housing member 16, and the light exit side along the reflector portion of the light source lamp unit 1 in the light source lamp box 14 in the light source lamp box 14 which is made negative pressure by the light source lamp cooling fan 13. It is guided in the direction, flows from the first path 15 of the light source lamp box 14 to the cooling fan 13 for the light source lamp through the second path 17 of the light source lamp housing member 16, and is discharged out of the apparatus as indicated by the arrow.

As a result, in the light source lamp unit 1 serving as a heat source, a cooling action occurs due to forced air flow, and the air flow by the light source lamp cooling fan 13 or the driving voltage of the light source lamp cooling fan 13 is controlled. By performing the optimal adjustment, in the light source lamp unit 1, the cooling is adjusted to an appropriate temperature.

[0021]

Recently, a projection type liquid crystal display device uses a liquid crystal panel unit having a high resolution and a high definition in order to project image information more clearly. Brightness and brightness of the projection screen have been promoted to make it clear even if it is not dark, and the improvement of cooling performance of optical element parts etc. with the adoption of a light source lamp with high emission intensity is a major technical issue. I have.

Further, as in the case of a notebook personal computer or the like, compactness and light weight are also strongly demanded so as to be easy to carry, and there is a particular need for a miniaturized cooling structure that is incompatible with improvement in cooling performance.

However, in the above-described conventional configuration, the cooling fan 1 for the liquid crystal panel is provided below the liquid crystal panel unit 3.
0, an optical base 8 for mounting the cooling fan 10 for the liquid crystal panel, and a fan guard member 24 for safety consideration on the upstream side of the cooling fan 10 for the liquid crystal panel.
In addition, an intake filter 22 serving as dustproof means for preventing dust from adhering to the liquid crystal panel unit 3 when inhaling outside air.
In addition, since the filter is arranged in series, such as the bottom cover 25 of the filter, there is a problem that the thickness of the device is increased and the entire device is increased in size.

An air chamber 23 is provided upstream of the three openings 11 for guiding the cooling air of the cooling fan 10 for the liquid crystal panel to the liquid crystal panel unit 3, and the uniformized air is supplied to the three openings 11. However, in fact, the pressure loss of the ventilation circuit is reduced due to the sudden reduction of the cross-sectional area of the ventilation passage until the air discharged from the cooling fan 10 for the liquid crystal panel reaches the opening 11 from the air chamber 23. However, the air flow reaching the liquid crystal panel unit 3 is drastically reduced, and the cooling efficiency is extremely deteriorated.

Therefore, in order to secure the cooling performance,
The cooling fan 10 for a large liquid crystal panel with an excessive air volume must be installed, or the cooling fan 10 for a liquid crystal panel must be rotated at a high speed. As a result, the product size becomes large and the blowing noise becomes excessive. However, there is a problem that the properties are significantly reduced.

In addition, there is another problem that a vortex is generated due to turbulence of the air flow at a portion where the cross sectional area of the ventilation changes suddenly due to the same cause, and the blowing noise is increased.

Further, in the conventional cooling structure of the light source lamp portion, since the internal volume is made as small as possible in order to reduce the size of the entire apparatus, the path of the air flow is inevitably reduced, and the path is very small. It was often cramped. For this reason, air required for cooling the light source lamp unit 1 does not flow and the cooling performance is sufficiently exhibited, so that an auxiliary cooling fan needs to be added or the air volume of the light source lamp cooling fan 13 needs to be increased more than necessary. However, the configuration of the entire apparatus may be rather complicated or the price may be increased. Further, since the air passage for cooling the light source lamp unit 1 becomes complicated for the viewer, the ventilation resistance for the light source lamp cooling fan 13 becomes large, and the wind noise of the light source lamp cooling fan 13 becomes large. Become
There has been a major problem in that it hinders viewing and significantly lowers the merchantability of the device.

In particular, since the exhaust air of the cooling fan 13 for the light source lamp and the blowing noise accompanying the exhaust are radiated to the outside of the apparatus, they are likely to hinder viewing, and the installation location of the exhaust port also affects the commercial value. It has long been a major problem.

The present invention focuses on such a problem, and is particularly directly related to the performance of a product such as a projected image, and is a compact device capable of efficiently cooling the liquid crystal panel unit 3, which is the most important part to be cooled. Still another object of the present invention is to provide a projection-type liquid crystal display device having extremely low air blowing noise and high commercial value.

Another object of the present invention is to provide a projection type liquid crystal display device capable of improving the cooling efficiency of the light source lamp unit and suppressing the blowing noise radiated to the outside of the device.

[0031]

According to the present invention, there is provided a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and a condensed light unit. Three liquid crystal panel units R, G, and B for optically generating image information of light, a color combining optical unit for combining colors of optical information of the liquid crystal panel unit, and enlarging and projecting image information on a screen. A projection optical unit, a power supply unit serving as a drive source for driving the light source lamp unit or other electrical devices, a cooling air intake formed in an outer case of the apparatus, the liquid crystal panel unit, the light source lamp unit, and a power supply unit Outside air for cooling the liquid crystal panel unit and the front of the liquid crystal panel unit are introduced through the outside air intake for cooling. A single cooling fan for blowing cooling ambient air to the light source lamp unit and the power supply unit,
Air distribution means mounted on an air discharge port of the cooling fan, for branching and guiding the discharge air of the cooling fan to a cooling portion of the liquid crystal panel unit, the light source lamp unit, and the power supply unit; Air guided by the means to the liquid crystal panel unit and the light source lamp unit and the power supply unit,
The liquid crystal panel unit, the light source lamp unit, and the power supply unit are each provided with an air discharge port that is naturally discharged to the outside of the device after forcibly convecting the cooling portions.

The present invention also provides a light source lamp unit that emits a white light beam, an irradiation optical unit that collects light from the light source lamp unit, and an R unit that optically generates image information by using the collected light. , G, and B liquid crystal panel units, a color synthesizing optical unit for color synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and an inside of the light source lamp unit. Alternatively, a cooling fan that inhales a high-temperature atmosphere in the periphery and air inside the apparatus and discharges the air to the outside of the apparatus to cool and control the light source lamp unit, and a cooling fan installed in the apparatus outer case and discharges air from the cooling fan to the outside of the apparatus. And an exhaust port for exhausting air to the cooling fan, and the cooling fan is closed in a direction other than an air passage connecting the ventilation opening and the exhaust port. In state, the discharge airflow from the cooling fan is to repeat the expansion or compression, is characterized in that an exhaust chamber muffler formed in the form of repeating the expansion or contraction of the air passage sectional area.

The present invention also provides a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and an R, R for generating image information optically from the condensed light. Three liquid crystal panel units G and B, a color synthesizing optical unit for color synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and inside or inside the light source lamp unit. A cooling fan that cools and cools the light source lamp unit by inhaling a high-temperature atmosphere in the peripheral area and air inside the device and discharging the air to the outside of the device, and installed in an outer case of the device, and discharging air from the cooling fan to the outside of the device. An exhaust port for exhausting, disposed in an air discharge direction of the cooling fan,
In a state in which a ventilation path connecting the ventilation opening of the cooling fan and the exhaust port is closed, a ventilation path extending from the cooling fan to the exhaust port is divided into a plurality of ventilation paths, and an inner wall of the ventilation path is divided. Exhaust chamber silencing means formed of a sound absorbing member.

Further, the present invention provides a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and an R, R for generating image information optically by the condensed light. Three liquid crystal panel units G and B, a color synthesizing optical unit for color synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and inside or inside the light source lamp unit. A cooling fan for cooling the temperature of the light source lamp unit by sucking the high-temperature atmosphere in the peripheral area and the air inside the device and discharging the air to the outside of the device, and a device exterior substantially perpendicular to a direction in which air is discharged from the cooling fan. An exhaust port provided in a case for exhausting the air discharged from the cooling fan to the outside of the apparatus, and a passage connecting the ventilation opening of the cooling fan and the exhaust port. In a state where the passages other than the passages are closed, from the cooling fan to the exhaust port arranged in a direction substantially perpendicular to the direction in which the air from the cooling fan protrudes, the ventilation passage is continuously bent by bending in a substantially perpendicular direction. And a formed exhaust chamber silencing means.

Further, the present invention provides a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and an R, for optically generating image information using the condensed light. Three liquid crystal panel units G and B, a color synthesizing optical unit for synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, the light source lamp unit or other electric devices A power supply unit serving as a drive source for driving a dynamic device, and a propeller for inhaling high-temperature atmosphere inside or around the light source lamp unit and air inside the device and discharging the air to the outside of the device to cool and control the temperature of the light source lamp unit. A fan, an exhaust port installed in the outer case of the device, and an exhaust port for discharging air discharged from the propeller fan to the outside of the device, and a propeller A housing for fixing the fan, and in a state in which a portion other than a ventilation path connecting the ventilation opening portion of the propeller fan and the exhaust port, which is downstream of the discharge airflow of the propeller fan, is closed, upstream of the discharge airflow of the propeller fan. And a ventilation path means for forming a ventilation path, such as the light source lamp unit and the power supply unit, for inhaling a high-temperature atmosphere from at least two or more cooling locations.

According to the present invention having such features,
With a single cooling fan, air can be guided to the cooling parts of the liquid crystal panel unit, light source lamp unit, and power supply unit with low pressure loss by the air distribution means. Can be greatly reduced in size. Conventionally, at least three types of cooling fans corresponding to a liquid crystal panel unit, a light source lamp unit, and a power supply unit have a cooling structure. However, since a single fan is used, a beat noise caused by a plurality of cooling fans is generated. Since there is no exhaust at all and no unnecessary air volume is exhausted, the noise radiated to the outside of the apparatus can be significantly reduced, and the whole apparatus can be significantly reduced in size.

Further, according to the present invention having the above-described features, the blast noise caused by the exhaust air and the exhaust air of the cooling fan for the light source lamp radiated to the outside of the apparatus can be reduced immediately before the exhaust air is radiated to the outside of the apparatus. By repeating the expansion and contraction of the cross-sectional area of the ventilation path by the room silencer, sound pressure energy is repeatedly reflected or interfered inside the exhaust chamber silencer to produce a silencing effect, thereby suppressing the blowing noise radiated outside the device. I can do it. In addition, since the air passages other than the above-described air passages are closed, leakage of the discharge airflow from the cooling fan for the light source lamp is eliminated, and the ventilation efficiency can be greatly improved.

Further, according to the present invention having the above-described features, the blowing noise accompanying the exhaust air and the exhaust air of the cooling fan for the light source lamp radiated to the outside of the apparatus can be obtained just before the exhaust air is radiated to the outside of the apparatus. The inner wall is formed of a sound absorbing member, and the turbulence of the air flow due to the exhaust is rectified by the exhaust chamber silencing means partitioned into a plurality of ventilation passages, and the blowing noise is largely suppressed by the sound absorbing action. Radiated noise can be significantly reduced. In addition, since the air passages other than the above-described air passages are closed, leakage of the discharge airflow from the cooling fan for the light source lamp is eliminated, and the ventilation efficiency can be greatly improved.

Further, according to the present invention having the above-described features, the blowing noise accompanying the exhaust air and the exhaust air of the cooling fan for the light source lamp radiated to the outside of the apparatus can be obtained immediately before being radiated to the outside of the apparatus. The inner wall is formed of a sound absorbing member, and the exhaust direction of the cooling fan for the light source lamp is disposed between the exhaust port arranged at a position bent at a substantially right angle to the exhaust direction, by an exhaust chamber silencing means bent at a substantially right angle, The energy of the wind noise of the blades of the cooling fan accompanying the exhaust is absorbed by the bent inner wall of the exhaust chamber silencing means, and the amount of noise radiated from the exhaust port can be extremely reduced. In addition, since the air passages other than the above-described air passages are closed, leakage of the discharge airflow from the cooling fan for the light source lamp is eliminated, and the ventilation efficiency can be greatly improved.

According to the present invention having the above-described features, a propeller fan is used for cooling the light source lamp unit, and the air guide means for sucking at least two or more high temperature atmospheres whose housing is to be cooled. The cooling duct can also be used for two or more locations with a single cooling fan, so the number of parts can be kept low, and leakage other than the ventilation path can be blocked. It can be greatly improved.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and a condensed light. R that optically generates image information,
Three liquid crystal panel units G and B, a color synthesizing optical unit for synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, the light source lamp unit or other electric devices Power supply unit serving as a drive source for driving the external device, a cooling outside air intake formed in the outer case of the apparatus, and outside air for cooling the liquid crystal panel unit, the light source lamp unit and the power supply unit. A single cooling fan that is introduced into the inside of the device from the mouth and blows outside air for cooling to the liquid crystal panel unit and the light source lamp unit and the power supply unit,
Air distributing means mounted on an air discharge port of the cooling fan, for branching and guiding air discharged from the cooling fan to respective cooling portions of the liquid crystal panel unit, the light source lamp unit and the power supply unit, and After the air guided to the liquid crystal panel unit, the light source lamp unit, and the power supply unit by the air distribution means forcibly convects the cooling portion, the air outlet is naturally discharged to the outside of the device. Unit and the light source lamp unit and the power supply unit, respectively.The liquid crystal panel unit, the light source lamp unit and the power supply unit are provided with a single cooling fan, and the distribution efficiency is low with a low pressure loss by air distribution means. Because it can guide air, cooling performance is dramatically improved, To avoid using a number cooling fan,
The entire device can be significantly reduced in size.

In addition, at least three conventional liquid crystal panel units, light source lamp units, and power supply unit portions are provided.
Although it was a type of cooling fan, it had a cooling structure, but because it is a single fan, there is no beat noise between cooling fans generated by the interaction of multiple cooling fans,
Since unnecessary unnecessary air volume is not exhausted, there is an effect that noise radiated to the outside of the apparatus can be significantly reduced.

According to a third aspect of the present invention, there is provided a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, R for optically generating image information,
Three liquid crystal panel units G and B, a color synthesizing optical unit for color synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and inside or inside the light source lamp unit. A cooling fan that cools and cools the light source lamp unit by inhaling a high-temperature atmosphere in the peripheral area and air inside the device and discharging the air to the outside of the device, and installed in an outer case of the device, and discharging air from the cooling fan to the outside of the device. An exhaust port for exhausting the air, the cooling fan is disposed in a direction in which the air is discharged from the cooling fan, and the airflow discharged from the cooling fan is expanded or Exhaust chamber silencing means formed in such a manner that the cross-sectional area of the ventilation path is repeatedly expanded or contracted so as to repeat compression. The radiated exhaust noise of the cooling fan for the light source lamp and the blast noise caused by the exhaust are generated by the exhaust chamber silencing means that the cross-sectional area of the ventilation path repeatedly expands or contracts immediately before being exhausted to the outside of the device. The pressure energy is repeatedly reflected or interfered within the exhaust chamber silencing means to produce a silencing effect, and the blowing noise radiated to the outside of the apparatus can be reduced. In addition, since the air passage other than the above-mentioned air passage is closed, there is no leakage of the discharge airflow from the cooling fan for the light source lamp, so that the ventilation efficiency can be greatly improved.

According to a fourth aspect of the present invention, there is provided a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and a light source unit for condensing the light. R for optically generating image information,
Three liquid crystal panel units G and B, a color synthesizing optical unit for color synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and inside or inside the light source lamp unit. A cooling fan that cools and cools the light source lamp unit by inhaling a high-temperature atmosphere in the peripheral area and air inside the device and discharging the air to the outside of the device, and installed in an outer case of the device, and discharging air from the cooling fan to the outside of the device. An exhaust port for discharging, and a ventilation path extending from the cooling fan to the exhaust port in a state in which the air outlet is arranged in a direction in which the cooling fan discharges air, and except for a ventilation path connecting the ventilation opening of the cooling fan and the exhaust port. Into a plurality of ventilation passages, and exhaust chamber silencing means in which the inner walls of the plurality of ventilation passages are formed by a sound absorbing member. The blowing noise accompanying the exhaust air and exhaust of the cooling fan for the light source lamp is formed immediately before the exhaust air is radiated to the outside of the apparatus by forming an inner wall with a sound absorbing member, and by an exhaust chamber silencing means partitioned into a plurality of ventilation paths, The turbulence of the air flow caused by the exhaust is rectified, and the sound pressure energy of the blast noise is absorbed or attenuated by the above-mentioned sound absorbing member. Radiated noise can be significantly reduced. In addition, since the air passage other than the above-mentioned air passage is closed, there is no leakage of the discharge airflow from the cooling fan for the light source lamp, so that the ventilation efficiency can be greatly improved.

According to a fifth aspect of the present invention, there is provided a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and R for optically generating image information,
Three liquid crystal panel units G and B, a color synthesizing optical unit for color synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and inside or inside the light source lamp unit. A cooling fan for cooling the temperature of the light source lamp unit by sucking the high-temperature atmosphere in the peripheral area and the air inside the device and discharging the air to the outside of the device, and a device exterior substantially perpendicular to a direction in which air is discharged from the cooling fan. A cooling fan is provided from the cooling fan in a state where a case other than an exhaust port for discharging the air discharged from the cooling fan to the outside of the apparatus and a ventilation path connecting the ventilation opening of the cooling fan and the exhaust port are closed. The fan is bent in a substantially perpendicular direction to the exhaust port arranged in a direction substantially perpendicular to the air discharge direction of the fan to form a ventilation path continuously. The exhaust noise of the cooling fan for the light source lamp radiated to the outside of the device and the blast noise accompanying the exhaust are generated by the sound absorbing member on the inner wall immediately before being radiated to the outside of the device. Formed by
The exhaust direction of the cooling fan blades caused by the exhaust air is reduced by the exhaust chamber silencing means that is disposed between the exhaust port and the exhaust port that is disposed at a position that is bent at a substantially right angle to the exhaust direction of the cooling fan for the light source lamp. Is absorbed by the bent inner wall of the exhaust chamber silencing means, and the amount of noise radiated from the exhaust port can be extremely reduced.

Further, since the noise generation direction, that is, the radiation direction to the outside of the device is bent in a substantially right angle direction, the direct blast noise is radiated to the outside of the device because the sound is blocked by the inner wall of the exhaust chamber. This has the effect that the amount of noise can be significantly reduced. In addition, since the air passage other than the above-mentioned air passage is closed, there is no leakage of the discharge airflow from the cooling fan for the light source lamp, so that the ventilation efficiency can be greatly improved.

According to a sixth aspect of the present invention, there is provided a light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, R for optically generating image information,
Three liquid crystal panel units G and B, a color synthesizing optical unit for synthesizing optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, the light source lamp unit or other electric devices A power supply unit serving as a drive source for driving the dynamic device, and a high-temperature atmosphere inside or around the light source lamp unit and air inside the device to be sucked and discharged to the outside of the device,
A propeller fan that cools and regulates the temperature of the light source lamp unit, an exhaust port that is installed in an outer case of the device, and that discharges air discharged from the propeller fan to the outside of the device, and a housing that fixes the propeller fan, In a state in which a portion other than the ventilation path connecting the ventilation opening of the propeller fan and the exhaust port, which is downstream of the discharge air flow, is closed,
The ventilation path upstream of the discharge airflow of the propeller fan, such as the light source lamp unit and the power supply unit,
Air guiding means for forming an air guiding path for inhaling a high-temperature atmosphere from at least two or more of the cooling portions, wherein a propeller fan is used for cooling the light source lamp unit, and the housing is provided with a cooling object. Since it was also used as a baffle for inhaling at least two high temperature atmospheres,
Since the number of parts is kept low and leakage on the ventilation path can be blocked, the cooling efficiency can be greatly improved without increasing the size of the device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a plan view showing a cooling structure of a projection type liquid crystal display device of the present invention. FIG. 2 is a sectional view of the portion. Since the basic overall structure is the same as that of the prior art, FIGS. 8, 9 and 10 are also used at the same time, and the same components will be described using the same reference numerals.

Reference numeral 1 denotes a light source lamp unit, and reference numeral 2 denotes an irradiation optical unit that separates white light from the light source lamp unit 1 into red, blue, and green, and collects the separated lights. Reference numeral 3 denotes a liquid crystal panel unit that modulates the light condensed by the irradiation optical unit 2 in accordance with image information, and a color combining optical unit that performs color combination of the modulated light with a light valve that includes the liquid crystal panel unit 3. 4 form image information. In addition, an image is enlarged and projected on a screen by a projection optical unit 5 that enlarges and projects the light that has been color-synthesized by the color synthesizing optical unit 4. In addition, the light source lamp unit 1 and a power supply unit 6 serving as a drive source for driving an electric device and a signal processing circuit (not shown) are provided.

This type of projection type liquid crystal display device has a self-heating function of the light source lamp unit 1 having a strong light output, a rise in the temperature of the liquid crystal panel unit 3 and the like incident upon the light from the light source lamp unit 1 and a power supply unit 6. Generally, forcible cooling is required for heat generation of the internal element parts, and each cooling device using a cooling fan or the like is incorporated.

The cooling structure of the present invention will be described in detail with reference to the drawings. In FIG. 1, an optical base 8 is fixed to an exterior case 7, and the irradiation optical unit 2 is mounted on the optical base 8 while being positioned. The liquid crystal panel unit 3 is integrally engaged with the color synthesizing optical unit 4 with a liquid crystal panel mounting bracket 9 and is mounted on the optical base 8. The projection optical unit 5 is fixed to the optical base 8. The single cooling fan 101 that cools the liquid crystal panel unit 3 and the like is, for example, a small centrifugal fan having a large static pressure, and is arranged and fixed inside the outer case at a position away from the liquid crystal panel unit 3. The outside air intake 104 is provided in the exterior case 7 to take in outside air into the air intake of the cooling fan 101, and clean outside air that has passed through dustproof means such as an intake filter (not shown) is sucked into the inside of the apparatus. It has a mechanism.

The air outlet of the cooling fan 101 has an air delivery pipe 102 serving as an air distribution means for guiding the air discharged from the cooling fan 101 to the liquid crystal panel unit 3, the power supply unit 6 and the light source lamp unit 1. And the air discharged from the cooling fan 101 is supplied to the liquid crystal panel unit 3 and the power supply unit 6.
After being distributed to the light source lamp units 1, the air is blown to desired cooling portions to cool the respective units.

The cooling structure of the projection type liquid crystal display device configured as described above will be described with reference to FIGS. 1 and 2.

First, the flow of the cooling air from the cooling fan 101 described above is applied to the outside air intake port 1 provided in the outer case 7.
It is taken into the apparatus via an air filter, not shown, provided as an air cleaning means provided in the apparatus 04. The air outlet of the cooling fan 101 is provided with the liquid crystal panel unit 3.
The power supply unit 6 and the light source lamp unit 1 are each provided with an air delivery pipe 102 serving as an air distribution means for distributing and guiding cooling air.
Is distributed to two or more locations, and the cooling air is distributed to the liquid crystal panel unit 3, the power supply unit 6, and the light source lamp unit 1 to guide the air, thereby performing cooling. After being distributed and blown, the cooling air passes through the cooling portion of each unit, and then flows through the air outlet 103 provided above the air guiding portion of each unit to the outside of the device by natural convection or the cooling fan 101. Is exhausted by the static pressure.

According to the first embodiment described above, only a single cooling fan is used, and the air delivery pipe, which is an air distribution means, efficiently supplies a plurality of cooling parts such as a light source lamp unit, a liquid crystal panel unit, and a power supply unit. The cooling air can be guided well, and the cooling structure can be made extremely small. Further, since only a single cooling fan is used, there is an effect that a beat noise generated between a plurality of cooling fans and a cooling structure can be efficiently configured with a small amount of air, so that the noise of the entire apparatus can be extremely reduced.

In the embodiment of the present invention shown in FIG.
The color combining unit 4 has been described using a combining prism, but for example, a so-called mirror in which image information passing through three R, G, and B liquid crystal panels is sequentially combined by mirrors corresponding to respective colors. The cooling structure may be applied to a projection type liquid crystal projection device using a sequential synthesis method.

(Embodiment 2) FIG. 3 is a plan view showing a cooling structure of a projection type liquid crystal display device of the present invention. Since the basic overall structure is the same as that of the prior art, FIGS.
0 and the same components will be described using the same reference numerals.

Reference numeral 1 denotes a light source lamp unit, and reference numeral 2 denotes an irradiation optical unit that separates white light from the light source lamp unit 1 into red, blue, and green, and collects the separated lights. Reference numeral 3 denotes a liquid crystal panel unit that modulates the light condensed by the irradiation optical unit 2 in accordance with image information, and a color combining optical unit that performs color combination of the modulated light with a light valve that includes the liquid crystal panel unit 3. 4 form image information. Further, an image is enlarged and projected on a screen by a projection optical unit 5 for enlarging and projecting the light synthesized by the color synthesizing unit 4. In addition, the power supply unit 6 includes a power supply unit 6 serving as a drive source for driving a light source lamp and an electric device, and a signal processing circuit (not shown).

In this type of projection type liquid crystal display device, self-heating of the light source lamp unit 1 having a strong light output, a rise in the temperature of the liquid crystal panel unit 3 or the like incident by light from the light source lamp unit 1, a power supply unit 6 Generally, forcible cooling is required for the heat generated by the cooling device, and each cooling device using a cooling fan or the like is incorporated.

The details of the cooling structure will be described with reference to FIG. Reference numeral 201 denotes a light source lamp cooling fan that appropriately cools a high-temperature portion of the light source lamp unit 1 and adjusts the temperature by inhaling and ventilating high-temperature air around the light source lamp unit 1. The light source lamp box 14 is arranged on the upstream side of the air flow by the light source lamp cooling fan 201 and holds the light source lamp unit 1. The light source lamp box 14 is provided with a louver-shaped air outlet for discharging air in a high-temperature atmosphere around the light source lamp unit 1 sucked from the light source lamp cooling fan 201 to the outside of the apparatus. A passage that becomes one path 4 is formed integrally.

When the inside of the light source lamp box 14 is made to have a negative pressure by the light source lamp cooling fan 201, an air suction port is provided on the upstream side so that air flows along the reflector portion of the light source lamp unit 1. Are formed. The light source lamp housing member 16 is
Has a guide portion which can be detachably held so as to be exchangeable and manageable, and is positioned and fixed to the apparatus exterior case 7 or the irradiation optical unit 2. The light source lamp housing member 16 is provided with a positioning mechanism (not shown) that enables the light beam emitted from the light source lamp unit 1 to be positioned on a predetermined optical axis.

The light source lamp housing member 16 has a louver-shaped first flow path 15 of the light source lamp box 14.
And a second path 17 for airflow having a louver shape symmetrical to the light source lamp box 14 is integrally formed with the light source lamp box 14. Further, the light source lamp housing member 16 passes through the air inlet on the upstream side of the light source lamp box 14 and the air inlet on the upstream side so that air is introduced into the reflector portion of the light source lamp unit 1. Are formed. First air of the light source lamp box 14 and the light source lamp housing member 16
The louver shape of the path 15 and the second path 17 is such that the light source lamp unit 1 is
The projections have a symmetrical light-shielding louver shape that has a closed shape so as to have a light-shielding property so that unnecessary light flux does not leak to the side opposite to the light exit side.

The air in the high-temperature atmosphere sucked in by the cooling fan 201 for the light source lamp is exhausted from the exterior case 7, that is, the device, through the exhaust port 203 of the exterior case 7 arranged in the air discharge direction of the cooling fan 201 for the light source lamp. It is exhausted to the outside.

Here, according to the present invention, which is different from the prior art, the exhaust chamber between the air discharge port of the cooling fan 201 for the light source lamp and the exhaust port 203 provided in the outer case is replaced with the cooling fan for the light source lamp. The cooling fan 2 for the light source lamp is sealed in a state where there is no air leakage except for the ventilation path connecting the ventilation opening 201 and the exhaust port 203 of the outer case 7.
The exhaust chamber muffling means 202 is formed so that the cross-sectional area of the ventilation path is expanded or contracted repeatedly so that the discharge air flow of No. 01 repeats expansion or contraction.

With respect to the cooling structure of the projection type liquid crystal display device of the present invention configured as described above, a cooling mechanism and a mechanism for suppressing noise generated during cooling will be described with reference to FIG.

According to the above-described structure, the air flows into the light source lamp box 14 and the light source lamp housing member 16 from the air inlet through the light source lamp cooling fan 201 to cool the reflector portion of the light source lamp unit 1 and the like. The air is exhausted to the outside of the case 7. As for the flow of air, the outside air sucked by the cooling fan 10 for the liquid crystal panel from the vent of the exterior case 7 (not shown) is sucked from the air inlet provided in the light source lamp box 14 and the light source lamp housing 16. The light source lamp box 14 is guided in the direction opposite to the emission side along the reflector portion of the light source lamp unit 1 in the light source lamp box 14 which has been made negative pressure by the light source lamp cooling fan 201.
From the first path 15 through the second path 17 of the light source lamp housing member 16 to the light source lamp cooling fan 201,
Exhaust chamber silencing means 202 connecting the exhaust port 203 provided in the outer case 7 and the cooling fan 201 for the light source lamp as shown by the arrow.
Through the exhaust port 203 provided in the outer case 7 to the outside of the apparatus.

As a result, in the light source lamp unit 1 serving as a heat source, a cooling action occurs due to forced air flow, and the air flow rate of the light source lamp cooling fan 201 or the driving voltage of the light source lamp cooling fan 201 is controlled. By performing the optimal adjustment, in the light source lamp unit 1, the cooling is adjusted to an appropriate temperature.

Here, in the above-described configuration, the blowing air noise such as the wind noise caused by the blades of the cooling fan 201 for the light source lamp and the airflow noise of the airflow passing through the light shielding configuration is such that the cooling airflow is exhausted to the outside of the apparatus. At this time, it is radiated to the outside of the device like air. Therefore, in order to suppress noise, it is necessary to suppress noise before exhaust emission. On the other hand, in the cooling structure of the present invention, between the cooling fan 201 for the light source lamp and the exhaust port 203, the cross-sectional area of the ventilation path is repeatedly expanded or contracted so that the air flow repeats expansion or contraction. The exhaust chamber silencing means 202 in the form is provided.

As described above, according to the present embodiment, the air flow by the cooling fan is provided between the cooling fan used for cooling the light source lamp unit and the exhaust port for discharging the air discharged from the cooling fan to the outside of the apparatus. Exhaust chamber silencing means with a ventilation path that repeats expansion and contraction is provided, so when the ventilation noise passes through the exhaust chamber silencing means, the sound pressure is repeatedly reflected or interfered, and the energy of the noise is greatly reduced. The noise level is reduced, and the noise level is radiated to the outside of the apparatus while being suppressed. Therefore, there is an effect that the noise of the whole apparatus is remarkably reduced.

In the embodiment of the present invention shown in FIG.
The color combining unit 4 has been described using a combining prism, but for example, a so-called mirror in which image information passing through three R, G, and B liquid crystal panels is sequentially combined by mirrors corresponding to respective colors. The cooling structure may be applied to a projection type liquid crystal projection device using a sequential synthesis method.

(Embodiment 3) FIG. 4 is a plan view showing a cooling structure of a projection type liquid crystal display device of the present invention. FIG. 5 is a sectional view of the portion. The basic overall structure is the same as that of the prior art, and the basic configuration is the same as that of the second embodiment of the present invention, so that the detailed description is omitted.

Since the basic overall structure is the same as that of the prior art, the same components will be described using the same reference numerals with reference to FIGS.

The details of the cooling structure will be described with reference to FIG. Reference numeral 301 denotes a cooling fan for a light source lamp that appropriately cools a high-temperature portion of the light source lamp unit 1 and controls the temperature by sucking and ventilating high-temperature air around the light source lamp unit 1. The light source lamp box 14 is arranged on the upstream side of the air flow by the light source lamp cooling fan 301 and holds the light source lamp unit 1. The light source lamp box 14 is provided with a louver-shaped air outlet for discharging air in a high-temperature atmosphere around the light source lamp unit 1 sucked from the light source lamp cooling fan 301 to the outside of the apparatus. A passage that becomes one path 4 is formed integrally.

When the inside of the light source lamp box 14 is made to have a negative pressure by the light source lamp cooling fan 301, an air suction port is provided upstream so that air flows along the reflector portion of the light source lamp unit 1. Are formed. The light source lamp housing member 16 is
Has a guide portion which can be detachably held so as to be exchangeable and manageable, and is positioned and fixed to the apparatus exterior case 7 or the irradiation optical unit 2. The light source lamp housing member 16 is provided with a positioning mechanism (not shown) that enables the light beam emitted from the light source lamp unit 1 to be positioned on a predetermined optical axis.

The light source lamp housing member 16 has a louver-shaped first flow path 15 of the light source lamp box 14.
And a second path 17 for airflow having a louver shape symmetrical to the light source lamp box 14 is integrally formed with the light source lamp box 14. Further, the light source lamp housing member 16 passes through the air inlet on the upstream side of the light source lamp box 14 and the air inlet on the upstream side so that air is introduced into the reflector portion of the light source lamp unit 1. Are formed. First air of the light source lamp box 14 and the light source lamp housing member 16
The louver shape of the path 15 and the second path 17 is such that the light source lamp unit 1 is
The projections have a symmetrical louver shape that has a closed shape so as to have a light shielding property so that unnecessary light flux does not leak to the side opposite to the light exit side. The high-temperature atmosphere air sucked in by the light source lamp cooling fan 301 is discharged to the outside of the outer case 7, that is, to the outside of the apparatus by the exhaust port 303 arranged in the air discharge direction of the light source lamp cooling fan 301 of the outer case 7. It is supposed to be exhausted.

Here, in the present invention, which is different from the prior art, in the present invention, the exhaust chamber between the air discharge port of the cooling fan 301 for the light source lamp and the exhaust port 303 provided in the outer case is provided with the cooling fan for the light source lamp. Ventilation connecting the ventilation opening of the light source lamp cooling fan 301 and the exhaust port 303 in a state where there is no air leakage except for the ventilation path connecting the ventilation opening of the 301 and the exhaust port 303 of the exterior case 7. That is, the passage is divided into a plurality of ventilation passages, and the exhaust wall silencing means 302 using the sound absorbing member 304 on the partition wall.

With respect to the cooling structure of the projection type liquid crystal display device configured as described above, a mechanism for suppressing noise generated during cooling will be described with reference to FIG. The cooling mechanism is the same as in the second embodiment.

Here, in the above-described configuration, the blowing noise such as the wind noise caused by the blades of the cooling fan 301 for the light source lamp and the airflow noise of the airflow passing through the light-shielding configuration is generated when the cooling airflow is exhausted to the outside of the apparatus. Is radiated to the outside of the device like air. Therefore, in order to suppress noise, it is necessary to suppress noise before exhaust emission. On the other hand, in the cooling structure of the present invention, between the cooling fan 301 for the light source lamp and the exhaust port 303, a plurality of ventilation paths connecting the ventilation opening of the cooling fan 301 for the light source lamp and the exhaust port 303 are provided. And an exhaust chamber muffling means 302 using a sound absorbing member 304 is provided on the partition wall.

According to the third embodiment described above, the ventilation path between the cooling fan used for cooling the light source lamp unit and the exhaust port for exhausting the air discharged from the cooling fan to the outside of the apparatus is divided into a plurality of ventilation paths. Since the exhaust chamber is provided with an exhaust chamber silencing means which is divided into passages and the inner walls of the plurality of ventilation passages are formed of a sound absorbing member, the energy of the blowing noise from the cooling fan is absorbed by the inner walls of the plurality of ventilation passages, and is directed to the outside of the device. This has the effect of significantly reducing the blast noise radiated, and significantly reducing the noise of the entire apparatus.

In the embodiment of the present invention shown in FIG.
The color combining unit 4 has been described using a combining prism, but for example, a so-called mirror in which image information passing through three R, G, and B liquid crystal panels is sequentially combined by mirrors corresponding to respective colors. The cooling structure may be applied to a projection type liquid crystal projection device using a sequential synthesis method.

(Embodiment 4) FIG. 6 is a plan view showing a cooling structure of a projection type liquid crystal display device of the present invention. The basic structure is the same as that of the prior art, and the basic configuration is the same as that of the second embodiment. 8 and 9, the same components will be described using the same reference numerals.

The cooling structure will be described in detail with reference to FIG. Reference numeral 401 denotes a light source lamp cooling fan that appropriately cools a high-temperature portion of the light source lamp unit 1 and controls the temperature by sucking and ventilating high-temperature air around the light source lamp unit 1. The light source lamp box 14 is arranged on the upstream side of the air flow by the light source lamp cooling fan 401 and holds the light source lamp unit 1. The light source lamp box 14 is provided with a louver-shaped air outlet for discharging air in a high-temperature atmosphere around the light source lamp unit 1 sucked from the light source lamp cooling fan 401 to the outside of the apparatus. A passage that becomes one path 4 is formed integrally.

When the inside of the light source lamp box 14 is made to have a negative pressure by the light source lamp cooling fan 401, an air suction port is provided upstream so that air flows along the reflector portion of the light source lamp unit 1. Are formed. The light source lamp housing member 16 is
Has a guide portion which can be detachably held so as to be exchangeable and manageable, and is positioned and fixed to the apparatus exterior case 7 or the irradiation optical unit 2. The light source lamp housing member 16 is provided with a positioning mechanism (not shown) that enables the light beam emitted from the light source lamp unit 1 to be positioned on a predetermined optical axis.

The light source lamp housing member 16 has a louver-shaped first flow path 15 of the air flow of the light source lamp box 14.
And a second path 17 for airflow having a louver shape symmetrical to the light source lamp box 14 is integrally formed with the light source lamp box 14. Further, the light source lamp housing member 16 passes through the air inlet on the upstream side of the light source lamp box 14 and the air inlet on the upstream side so that air is introduced into the reflector portion of the light source lamp unit 1. Are formed. First air of the light source lamp box 14 and the light source lamp housing member 16
The louver shape of the path 15 and the second path 17 is such that the light source lamp unit 1 is
The projections have a symmetrical louver shape that has a closed shape so as to have a light shielding property so that unnecessary light flux does not leak to the side opposite to the light exit side. The high-temperature atmosphere air sucked in by the light source lamp cooling fan 401 is discharged to the outside of the exterior case 7, that is, to the outside of the apparatus by the exhaust port 402 of the exterior case 7 arranged in the air discharge direction of the light source lamp cooling fan 401. It is supposed to be exhausted.

Here, according to the present invention, which is different from the prior art, the exhaust port 402 provided in the outer case 7 is bent at right angles to the air discharge port of the cooling fan 401 for the light source lamp.
Between the ventilation opening of the cooling fan 401 for the light source lamp and the exhaust port 4 of the outer case 7.
The air passages other than the ventilation passage connecting the exhaust chambers 02 are formed so as to be sealed so as not to leak air, and a sound absorbing member 404 is attached to part or all of the inner wall of the exhaust chamber.

Referring to FIG. 1, the cooling structure of the projection type liquid crystal display device configured as described above will be described with reference to FIG. The cooling mechanism is the same as in the second embodiment.

Here, in the above-described configuration, the blowing noise such as the wind noise caused by the blades of the cooling fan 401 for the light source lamp and the airflow noise of the airflow passing through the light-shielding structure is generated when the cooling airflow is exhausted to the outside of the apparatus. Is radiated to the outside of the device like air. Therefore, in order to suppress noise, it is necessary to suppress noise before exhaust emission. On the other hand, in the cooling structure of the present invention, the light source lamp cooling fan 401 is bent in a direction perpendicular to the air discharging direction, and the light source lamp is provided between the cooling fan 401 and the exhaust port 402 provided in the outer case 7. The ventilation opening of the cooling fan 401 for air and the exhaust port 402 of the outer case 7 are formed in a state in which the air passage other than the ventilation path that is connected while being bent is sealed so as not to leak air, and a part of the inner wall of the exhaust chamber 402 or The entire structure is constituted by exhaust chamber silencing means 403 to which a sound absorbing member 404 is attached.

With respect to the cooling structure of the projection type liquid crystal display device configured as described above, a mechanism for suppressing noise generated during cooling will be described with reference to FIG. The cooling mechanism is the same as in the second embodiment.

Here, in the above-described configuration, the blowing noise such as the wind noise caused by the blades of the cooling fan 401 for the light source lamp and the airflow noise of the airflow passing through the light-shielding structure is generated when the cooling airflow is exhausted to the outside of the apparatus. Is radiated to the outside of the device like air. Therefore, in order to suppress noise, it is necessary to suppress noise before exhaust emission. On the other hand, in the cooling structure of the present invention, a ventilation path connecting the ventilation opening of the cooling fan 401 for the light source lamp and the exhaust port 402 is bent between the cooling fan 401 for the light source lamp and the exhaust port 402. The exhaust chamber muffling means 403 is provided, and a part or all of the inner wall is formed by a sound absorbing member 404.

As described above, according to the present embodiment, the exhaust fan having a bent ventilation path between the cooling fan used for cooling the light source lamp unit and the exhaust port for exhausting the air discharged from the cooling fan to the outside of the device. Since the room noise reduction means 403 is provided and a part or the whole of the inner wall is formed by the sound absorbing member 404, the wind noise of the blades of the cooling fan 401 for the light source lamp and other blowing noises are generated by bending the exhaust air. Room silencing means 403
When passing through, the noise energy is largely absorbed by the sound absorbing member 404, and the exhaust direction radiated to the outside and the radiation direction of the blast noise generated from the light source lamp cooling fan 401 are bent. Therefore, not the direct radiated sound, but the indirect radiated sound after the noise energy is absorbed and goes out of the device, has the effect of suppressing the noise of the entire device extremely low.

Note that in the embodiment of the present invention shown in FIG.
The color combining unit 4 has been described using a combining prism, but for example, a so-called mirror in which image information passing through three R, G, and B liquid crystal panels is sequentially combined by mirrors corresponding to respective colors. The cooling structure may be applied to a projection type liquid crystal projection device using a sequential synthesis method.

(Embodiment 5) FIG. 7 is a plan view showing a cooling structure of a projection type liquid crystal display device of the present invention. The basic overall structure is the same as that of the prior art, and the basic configuration is the same as that of the second embodiment, so that the detailed description is omitted here. 8 and 9, the same components will be described using the same reference numerals.

The details of the cooling structure and the cooling mechanism will be described with reference to FIG. Reference numeral 501 denotes a propeller fan for cooling a light source lamp that appropriately cools a high-temperature portion of the light source lamp unit 1 and controls the temperature by inhaling and ventilating high-temperature air around the light source lamp unit 1. 5
Reference numeral 02 denotes a ventilation path means that serves as a ventilation path for the propeller fan 501 and serves as a housing for the propeller fan 501.

The light source lamp box 14 is provided with a propeller fan 50.
The light source lamp unit 1 is disposed on the upstream side of the air flow formed by the air flow path 1 and the air guide path means 502. The light source lamp box 14 is provided to discharge air of a high-temperature atmosphere around the light source lamp unit 1 sucked by a static pressure generated by a ventilation path formed by a propeller fan 501 and a ventilation path means 502 to the outside of the apparatus. A passage serving as a first passage 4 of the air flow serving as an exhaust port of the louvered air is integrally formed.

Further, since the inside of the light source lamp box 14 becomes negative pressure due to the static pressure generated in the ventilation path formed by the propeller fan 501 and the ventilation path means 502, the light source lamp unit 1 An air inlet is formed on the upstream side so that air flows along the air. The light source lamp housing member 16 has a guide portion that can be detachably held so that the light source lamp box 14 can be exchanged and managed, and is positioned and fixed to the apparatus exterior case 7 or the irradiation optical unit 2. Light source lamp storage member 1
Numeral 6 is provided with a positioning mechanism (not shown) that can freely position a light beam emitted from the light source lamp unit 1 on a predetermined optical axis.

The light source lamp housing member 16 has a louver-shaped first path 15 of air flow of the light source lamp box 14.
And a second path 17 for airflow having a louver shape symmetrical to the light source lamp box 14 is integrally formed with the light source lamp box 14. Further, the light source lamp housing member 16 passes through the air inlet on the upstream side of the light source lamp box 14 and the air inlet on the upstream side so that air is introduced into the reflector portion of the light source lamp unit 1. Are formed. First air of the light source lamp box 14 and the light source lamp housing member 16
The louver shape of the path 15 and the second path 17 is such that the light source lamp unit 1 is
The projections have a symmetrical louver shape that has a closed shape so as to have a light shielding property so that unnecessary light flux does not leak to the side opposite to the light exit side. The high-temperature atmosphere air sucked in by the propeller fan 501 is exhausted to the outside of the outer case 7, that is, to the outside of the apparatus by the exhaust port 502 of the outer case 7 arranged in the air discharge direction of the propeller fan 501. ing.

The cooling structure of the present invention configured as described above is different from the prior art in that the propeller fan 50
The ventilation path serving as the air guide path means 503, which is the mounting housing for the first unit, forms a ventilation path serving as the air guide path means 503 from at least two or more cooling locations such as the power source unit 6 as well as the light source lamp unit 1. That's what you're doing.

As described above, according to the fifth embodiment of the present invention, 1
Since two propeller fans are used and the air guide path serving also as a mounting housing for the propeller fan is formed in at least two places to cool two or more cooling parts,
Since not only the light source lamp unit 1 but also the inside of the power supply unit 6 is exhausted to the outside after the high-temperature atmosphere is sucked in, the cooling efficiency can be significantly improved without adding any components.

In the embodiment of the present invention shown in FIG.
The color combining unit 4 has been described using a combining prism, but for example, a so-called mirror in which image information passing through three R, G, and B liquid crystal panels is sequentially combined by mirrors corresponding to respective colors. The cooling structure may be applied to a projection type liquid crystal projection device using a sequential synthesis method.

[0100]

As described above, according to the present invention, a single cooling fan can guide air to the liquid crystal panel unit, the light source lamp unit, and the power supply unit with low pressure loss by the air distribution means. The performance is remarkably improved and the entire device can be significantly reduced in size. Conventionally, at least three types of cooling fans corresponding to a liquid crystal panel unit, a light source lamp unit, and a power supply unit have a cooling structure. However, since a single fan is used, a beat noise caused by a plurality of cooling fans is generated. Not at all
In addition, since an unnecessary amount of airflow is not exhausted, an excellent effect that noise radiated to the outside of the apparatus can be significantly reduced can be obtained.

Further, as described above, according to the present invention, the exhaust noise emitted from the cooling fan for the light source lamp and the blast noise radiated to the outside of the apparatus by the exhaust chamber silencing means immediately before the exhaust air is radiated to the outside of the apparatus. By repeating the expansion and contraction of the cross-sectional area of the ventilation passage, sound pressure energy is repeatedly reflected or interfered inside the exhaust chamber silencing means to produce a silencing effect, and the blowing noise radiated to the outside of the device can be reduced. In addition, since the air passages other than the above-described air passages are closed, there is no leakage of the discharge airflow from the cooling fan for the light source lamp, and an excellent effect that the ventilation efficiency can be greatly improved can be obtained.

Further, as described above, according to the present invention, the noise generated by the exhaust air and the exhaust air of the cooling fan for the light source lamp radiated to the outside of the device is reduced by the sound absorbing member on the inner wall just before the air is radiated to the outside of the device. The turbulence of the air flow caused by the exhaust is rectified by the exhaust chamber silencing means that is formed and partitioned into a plurality of ventilation paths, and the blowing noise is significantly suppressed by the sound absorption function, and the amount of radiated noise to the outside of the device is reduced. Can be significantly reduced. In addition, since the air passages other than the above-described air passages are closed, there is no leakage of the discharge airflow from the cooling fan for the light source lamp, and an excellent effect that the ventilation efficiency can be greatly improved can be obtained.

As described above, according to the present invention, the noise generated by the exhaust air and the exhaust air of the cooling fan for the light source lamp radiated to the outside of the apparatus is reduced by the sound absorbing member on the inner wall immediately before being radiated to the outside of the apparatus. The exhaust fan of the cooling fan for the light source lamp is formed and disposed between the exhaust port disposed at a position bent at a right angle to the exhaust port. The energy of the wind noise is absorbed by the bent inner wall of the exhaust chamber silencing means, and the amount of noise radiated from the exhaust port can be extremely reduced. In addition, since the air passages other than the above-described air passages are closed, there is no leakage of the discharge airflow from the cooling fan for the light source lamp, and an excellent effect that the ventilation efficiency can be greatly improved can be obtained.

As described above, in the present invention, the propeller fan is used for cooling the light source lamp unit, and the housing is also used as the air guiding means for sucking at least two or more high-temperature atmospheres to be cooled. Since the number of parts can be kept low and leakage on the ventilation path can be blocked, an excellent effect that the cooling efficiency can be greatly improved without increasing the size of the device can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a cooling structure according to a first embodiment of the present invention.

FIG. 2 is a side view showing a cross-sectional structure of the portion according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a cooling structure according to a second embodiment of the present invention.

FIG. 4 is a side view showing a cooling structure according to a third embodiment of the present invention.

FIG. 5 is a side view showing a cross-sectional structure of the portion according to the third embodiment of the present invention.

FIG. 6 is a plan view showing a cooling structure according to a fourth embodiment of the present invention.

FIG. 7 is a plan view showing a cooling structure according to a fifth embodiment of the present invention.

FIG. 8 is a plan view showing an outline of the overall configuration of a projection type liquid crystal display device according to the related art.

FIG. 9 is a side sectional view showing a cooling structure of a liquid crystal panel unit according to the related art.

FIG. 10 is a plan view showing a cooling structure of a conventional light source lamp unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light source lamp unit 2 Irradiation optical unit 3 Liquid crystal panel unit 4 Color combining optical unit 5 Projection optical unit 6 Power supply unit 7 Outer case 8 Optical base 9 Liquid crystal panel mounting bracket 10 Liquid crystal panel cooling fan 11 Opening 12 Air chamber 13 Light source lamp Cooling fan 14 Light source lamp box 15 First path 16 Light source lamp housing member 17 Second path 18 Exhaust port 19 Power supply unit cooling fan 20 Opening 21 Power supply unit case 22 Intake filter 23 Air chamber 24 Fan guard member 25 Bottom cover 101 Cooling fan 102 air delivery pipe 103 air outlet 104 outside air intake 201 cooling fan 202 exhaust chamber silencing means 203 air exhaust port 301 cooling fan 302 exhaust chamber silencing means 303 air exhaust port 30 4 Sound Absorbing Member 401 Cooling Fan 402 Air Exhaust Port 403 Exhaust Chamber Silencing Means 404 Sound Absorbing Member 501 Propeller Fan 502 Air Exhaust Port 503 Wind Guide Means

Claims (7)

[Claims] 1. A light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and optical information generated from the light condensed by the irradiation optical unit. Three liquid crystal panel units of R, G and B, a color combining optical unit for combining colors of optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and the light source lamp unit or In addition, a power supply unit serving as a drive source for driving an electric device, a cooling outside air intake formed in an outer case of the device, and an outside air for cooling the liquid crystal panel unit, the light source lamp unit and the power supply unit are used for the cooling. The liquid crystal panel unit, the light source lamp unit, and the A single cooling fan that blows outside air for cooling to the power supply unit, and a cooling fan mounted on an air discharge port of the cooling fan, and the cooling fan is provided at each of the liquid crystal panel unit, the light source lamp unit, and the power supply unit. Air distribution means for branching and guiding the discharged air, respectively, and air guided to the liquid crystal panel unit, the light source lamp unit and the power supply unit by the air distribution means, forcibly convecting the cooling portion, respectively. The liquid crystal panel unit, the light source lamp unit, and the power supply unit are each provided with an air discharge port that is naturally discharged to the outside of the device, after which the cooling structure of the projection type liquid crystal display device is provided. 2. The cooling structure according to claim 1, wherein the cooling fan is a centrifugal fan. 3. A light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and optically generating image information using the light condensed by the irradiation optical unit. Three liquid crystal panel units of R, G and B, a color combining optical unit for combining colors of optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and a light source lamp unit. A cooling fan for sucking and discharging the high-temperature atmosphere inside or around the device and the air inside the device to the outside of the device to cool and control the temperature of the light source lamp unit, and installed in an external case of the device, and discharges the air discharged from the cooling fan to the device. An exhaust port for exhausting air to the outside and an air outlet disposed in the air discharge direction of the cooling fan, and sealing the air passages other than the ventilation path connecting the ventilation opening of the cooling fan and the exhaust port. Exhaust chamber silencing means formed in such a manner that the cross-sectional area of the ventilation path is repeatedly expanded or contracted so that the air flow discharged from the cooling fan repeats expansion or compression in a state where the cooling air flows from the cooling fan. Cooling structure of liquid crystal display. 4. A light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and optical information generated from the light condensed by the irradiation optical unit. Three liquid crystal panel units of R, G and B, a color combining optical unit for combining colors of optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and a light source lamp unit. A cooling fan for sucking and discharging the high-temperature atmosphere inside or around the device and the air inside the device to the outside of the device to cool and control the temperature of the light source lamp unit, and installed in an external case of the device, and discharges the air discharged from the cooling fan to the device. An exhaust port for exhausting air to the outside and an air outlet disposed in the air discharge direction of the cooling fan, and sealing the air passages other than the ventilation path connecting the ventilation opening of the cooling fan and the exhaust port. And an exhaust chamber silencing means in which the ventilation path extending from the cooling fan to the exhaust port is divided into a plurality of ventilation paths and the inner walls of the plurality of ventilation paths are formed of a sound absorbing member. Cooling structure of projection type liquid crystal display. 5. A light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and optically generating image information from the light condensed by the irradiation optical unit. Three liquid crystal panel units of R, G and B, a color combining optical unit for combining colors of optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and a light source lamp unit. A cooling fan that cools and regulates the temperature of the light source lamp unit by inhaling a high-temperature atmosphere inside or around the device and air inside the device and discharging the air to the outside of the device, and substantially perpendicular to a direction in which air is discharged from the cooling fan. An exhaust port disposed in an outer case of the apparatus, for exhausting air discharged from the cooling fan to the outside of the apparatus, a ventilation opening of the cooling fan, and the exhaust port In a state where the air passages other than the air passages to be connected are closed, the air passage is bent in a substantially right angle direction to continuously connect the air passage from the cooling fan to the exhaust port arranged in a direction substantially perpendicular to the air discharge direction of the cooling fan. A cooling structure for a projection type liquid crystal display device, comprising: 6. The projection according to claim 5, wherein the inner wall of the ventilation passage of the exhaust chamber silencer is formed of a sound absorbing member having a width of at least 10% of the width of the ventilation passage of the exhaust chamber silencer. Cooling structure for liquid crystal display devices. 7. A light source lamp unit for emitting a white light beam, an irradiation optical unit for condensing light from the light source lamp unit, and optically generating image information using the light condensed by the irradiation optical unit. Three liquid crystal panel units of R, G and B, a color combining optical unit for combining colors of optical information of the liquid crystal panel unit, a projection optical unit for enlarging and projecting image information on a screen, and the light source lamp unit or In addition, a power supply unit serving as a drive source for driving an electric device, a high-temperature atmosphere inside or around the light source lamp unit and air inside the device are sucked and discharged to the outside of the device, and the light source lamp unit is cooled and controlled. A propeller fan, and an exhaust port installed in the outer casing of the device for discharging air discharged from the propeller fan to the outside of the device. A housing for fixing the propeller fan, wherein a portion other than a ventilation passage connecting the ventilation opening of the propeller fan and the exhaust port, which is downstream of the projection airflow of the propeller fan, is closed, and the projection airflow of the propeller fan is A projection type, wherein an upstream ventilation path is provided with a ventilation path means, such as the light source lamp unit and the power supply unit, which forms a ventilation path for inhaling a high-temperature atmosphere from at least two or more cooling locations. Cooling structure of liquid crystal display.