JP5352950B2 - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal projector device capable of reducing deterioration in cooling effect due to clogging of a filter with a simple configuration and extremely reducing filter exchanging works or cleaning works. <P>SOLUTION: In the projector 20 with forced air-cooling, a detachably installed filter unit 5 includes a movable pre-filter 7, air filters 10, 11 having dust prevention performance with particle-removing diameter smaller than that of the pre-filter 7, a brush 9 removing powder dust attached to the pre-filter 7, and a movable mechanism 8 of the pre-filter 7. Thus, the dirt and powder dust collected by the pre-filter 7 are removed. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a forced air-cooled projector apparatus that improves the dust-proofing effect without reducing the cooling effect due to the clogging of dust or dust in the filter unit portion of the air inlet.

  In recent years, projector apparatuses using devices that optically modulate video signals such as DMDs and liquid crystal panels have become mainstream. In this projector apparatus, an image of a device in which light emitted from a light source is condensed on a device via a mirror or the like and light-modulated is enlarged and projected onto a screen through a projection lens.

  In such devices and optical components, the temperature rises by receiving light from the light source, and the reliability and lifetime are extremely reduced. Further, since the light source lamp also generates a large amount of heat, it is generally cooled in order to suppress the temperature rise as in the case of a device or the like.

  For cooling, forced air cooling is generally used to forcibly take in air from the outside of the projector device using a blower fan.For this reason, in order to prevent dust contained in the air taken in from adhering to the device and appearing in the image. In addition, a filter for collecting dust and dust is provided at the air intake port from the outside.

Conventionally, in Patent Document 1, a filter housing member is provided in the opening of a cabinet of an intake fan, and a first air filter and a second particle having a smaller removed particle size are detachable along the air path in the filter housing member. It has been proposed to improve the dustproof performance by configuring the air filter and improve the service of cleaning and replacement.
Japanese Patent Laid-Open No. 10-200247

  In recent years, projector apparatuses have become brighter, smaller, lighter, and more compact, and stable cooling is extremely important in order to suppress the temperature rise of devices and light source lamps.

  In the conventional technology, dust or dust sucked from the outside during cooling is collected on the filter, but the filter eyes are clogged with dust over time, and there is a problem that the cooling effect is lowered.

  Further, in order to improve the cooling effect, an operation of frequently exchanging or cleaning the filter occurs, and this is a considerably complicated operation in the case of constant installation such as a ceiling suspension.

  In view of the above-described conventional problems, the present invention provides a projector device that can reduce the cooling effect due to filter clogging with a simple configuration and can greatly reduce filter replacement or cleaning work. It is.

The projector device of the present invention includes a light source block including a light source lamp that emits white light, an optical block that optically processes the white light emitted from the light source block, and generates an image, and the optical block generates the light source block. A projection lens unit for enlarging and projecting the projected image on a screen, an intake fan forcing outside air into a member that becomes hot in the optical block or the light source block, and cooling, and outside air for forced air cooling that is detachable from the outside of the apparatus in the projector device that includes a filter unit with the intake of the filter unit, sensing a prefilter movable, and clogging sensor for sensing the clogging of the prefilter, clogging by the clogging sensor Or when a preset time has passed, A drive mechanism unit for causing the movable Iruta, is composed of a brush for removing dust adhering to the pre-filter, a second air filter having a small dustproof performance of removing particle diameter than the pre-filter,
Further, the filter unit is detachable from the outside of the projector device, and is configured to be electrically connected to the projector device by a connector .

  According to the projector device of the present invention, the pre-filter movable mechanism and the brush are provided in the filter unit, so that the filter in the set of devices, light source lamps, and the like caused by filter clogging due to dust or dust in the air inlet of the projector device. It is possible to expect the effect of suppressing the rise in the component temperature and the reflection of dust on the projected image, and also reducing the noise caused by the increased air volume of the blower fan.

  In addition, the effect of significantly reducing the number of times of maintenance work for cleaning and replacement of the filter, which has frequently occurred in the past, can be expected.

  The projector device of the present invention includes a light source block including a light source lamp that emits white light, an optical block that optically processes the white light emitted from the light source block, and generates an image, and the optical block generates the light source block. A projection lens block for enlarging and projecting the projected image on the screen, an intake fan for forcibly taking outside air into the high temperature members of the optical block and light source block and cooling, and an outside air intake port that is detachable from the outside of the apparatus The filter unit includes a movable pre-filter, a drive mechanism unit for operating the pre-filter, a brush for removing dust attached to the pre-filter, and the filter unit. A second dust-proof performance with a smaller removal particle size than the prefilter to be stored A device and a light source lamp that are caused by clogging of the second air filter due to dust or dust by being arranged upstream of the second air filter. In addition, the temperature of the components in the set and the like, and the reflection of dust on the projected image are suppressed, and the noise caused by the increase in the air volume of the blower fan is also reduced.

  Further, it also has an effect of remarkably reducing the number of times of maintenance work for cleaning and replacement of the filter, which has frequently occurred in the past.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
1A and 1B show a schematic configuration diagram of a projector apparatus according to Embodiment 1 of the present invention. FIG. 1A is a plan view and FIG. 1B is a side view. FIG. 2 is an external perspective view of the projector apparatus according to the first embodiment of the present invention.

  As shown in FIGS. 1 and 2, the projector device 20 generates an image by optically processing the light source block 1 including a light source lamp that emits white light and the white light emitted from the light source block 1. The outside air is forcibly introduced into the optical block 2, the projection lens block 3 for enlarging and projecting the image generated by the optical block 2 onto a screen (not shown), and the optical block 2 and the light source block 1 at high temperature. From the cooling fan 4, the filter unit 5 that can be removed from the outside of the projector device 20 and having an outside air intake, and the exhaust fan 6 that discharges high-temperature air around the light source block 1 to the outside of the device It is configured.

  As shown in FIG. 2, the filter unit 5 is detachable from the outside of the projector device 20 and is electrically connected to the projector device 20 by a connector 13 described later.

  3 to 5 are diagrams showing a schematic configuration of the filter unit of the projector device according to the first embodiment of the present invention, FIG. 3 is a plan view showing a stationary state of the pre-filter 7, FIG. 4 is a side view of the same state, FIG. 5 is a plan view showing the movable state of the pre-filter 7.

  As shown in FIGS. 3 and 4, the filter unit 5 is disposed so as to sandwich the movable prefilter 7, the drive mechanism unit 8 for moving the prefilter 7, and the prefilter 7. A brush 9 for removing dust adhering to the air and a second and third air filters 10 and 11 having a dust-proof performance having a smaller removal particle diameter than the pre-filter 7 are housed. The third plurality of air filters 10 and 11 are disposed upstream of the air path. As shown in FIG. 4, the whole surface 5a which the prefilter 7 opposes is open | released, and becomes the intake of external air. The air filter 10, 11 side surface is provided with an opening 5 b through which air from which dust or dust has been removed from outside air is passed to the intake fan 4.

  Here, the brush 9 is fixed to the housing of the filter unit 5 and is disposed at a position where it does not overlap with the air filters 10 and 11 in plan view.

  Further, a rack 7 a is provided on the outer peripheral side surface of the pre-filter 7, and the pre-filter 7 is moved in parallel along the rail 12 by a motor 8 a via a gear 8 b in the drive mechanism unit 8. Reference numeral 13 denotes a connector for electrically connecting the position detection switch 14 for detecting the movable position of the motor 8 a and the pre-filter 7 to the projector device 20.

  Reference numeral 15 denotes a clogging sensor that is determined based on the transmittance of the pre-filter 7 or the flow velocity of the incoming air.

  In the projector apparatus configured as described above, when the clogging sensor 15 senses that a certain amount of dust has accumulated in the pre-filter 7, or when a predetermined time has passed, FIG. As shown, the motor 8a of the drive mechanism unit 8 is driven to move the prefilter 7 in parallel in the direction of the arrow through the gear 8b and the rack 7a of the prefilter 7. As the pre-filter 7 moves, friction is generated between the pre-filter 7 and dust and dust adhering to the pre-filter 7 are removed by the brush 9.

  The movement of the pre-filter 7 is sensed by the position detection switch 14 and reversed, and stops at a predetermined position.

  Since the filter unit 5 is detachable from the outside of the projector device 20, dust and dust accumulated in the filter unit 5 can be discarded by periodically removing the filter unit 5.

  In this way, by providing the pre-filter movable mechanism and brush on the filter unit, it is possible to prevent clogging of the filter due to dust and dust at the air inlet of the projector device, and the resulting set in the set of devices, light source lamps, etc. The temperature rise of the parts and the reflection of dust on the projected image are also suppressed, and the noise caused by the increased air volume of the blower fan can be reduced.

  Further, since the brush 9 is fixed to the housing of the filter unit 5 and the pre-filter 7 is moved, the dust and dust removed by the brush 9 can be collected in one place. And the air filters 10 and 11 are arranged at positions where they do not overlap with each other in a plane, so that the dust and dust removed from the air filters 10 and 11 are attached to the air filters 10 and 11 again, thereby improving the dustproof performance of the air filters 10 and 11. It will not be reduced.

  In addition, it is possible to significantly reduce the number of times of maintenance work for cleaning and replacing the filter, which has frequently occurred in the past.

(Embodiment 2)
6 to 8 are diagrams showing a schematic configuration of the filter unit of the projector device according to the second embodiment of the present invention. FIG. 6 is a plan view showing a stationary state of the pre-filter 7, and FIG. 7 is a side view of the same state. FIG. 8 is a plan view showing a movable state of the pre-filter 7. In the present embodiment, the same components as those in the first embodiment are given the same numbers.

  As in FIG. 2 of the first embodiment, the filter unit 5 is detachable from the outside of the projector device 20 and is electrically connected to the projector device 20 by a connector 13 described later.

  As shown in FIGS. 6 and 7, the filter unit 5 is arranged so as to sandwich the movable prefilter 7, the drive mechanism unit 8 for moving the prefilter 7, and the prefilter 7. A brush 9 for removing dust and dust adhering to the air and a second and a third plurality of air filters 10 and 11 having a dust-removing performance smaller in the removal particle diameter than the pre-filter 7 are housed. The second and third air filters 10 and 11 are disposed upstream of the air path. As shown in FIG. 7, the whole surface 5a which the prefilter 7 opposes is open | released, and becomes an intake port of external air. The air filter 10, 11 side surface is provided with an opening 5 b through which air from which dust or dust has been removed from outside air is passed to the intake fan 4.

    Here, the brush 9 is fixed to the housing of the filter unit 5, and the air filters 10 and 11 are arranged at positions where the air filters 10 and 11 partially overlap but most do not overlap.

  A rack 7 a is provided on the outer peripheral side surface of the pre-filter 7, and the pre-filter 7 is rotationally movable around the rotation shaft 16 by a motor 8 a via a gear 8 b in the drive mechanism unit 8. Reference numeral 13 denotes a connector for electrically connecting the position detection switch 14 for detecting the movable position of the motor 8 a and the pre-filter 7 to the projector device 20.

  Reference numeral 15 denotes a clogging sensor that is determined based on the transmittance of the pre-filter 7 or the flow velocity of the incoming air.

  In the projector device configured as described above, when the clogging sensor 15 detects that a certain amount of dust is accumulated in the prefilter 7 based on the transmittance of the prefilter 7 or the flow velocity of the flowing air, Alternatively, when a predetermined period of time has passed, the motor 8a of the drive mechanism unit 8 is driven as shown in FIG. 8, and the prefilter 7 is moved to the rotary shaft 16 via the gear 8b and the rack 7a of the prefilter 7. Rotate in the direction of the arrow around the center. As the pre-filter 7 moves, friction is generated between the pre-filter 7 and dust and dust adhering to the pre-filter 7 are removed by the brush 9.

  The movement of the pre-filter 7 is detected by the position detection switch 14 and stopped at a predetermined position.

  Since the filter unit 5 is detachable from the outside of the projector device 20, dust and dust accumulated in the filter unit 5 can be discarded by periodically removing the filter unit 5.

  As described above, as in the first embodiment, the filter unit is provided with the pre-filter movable mechanism and the brush, so that the filter clogging due to dust or dust in the air inlet of the projector device can be prevented, and the device resulting therefrom. In addition, the temperature rise of components in the set such as the light source lamp and the like, and the reflection of dust on the projected image can be suppressed, and the noise caused by the increase in the air volume of the blower fan can be reduced.

  Further, since the brush 9 is fixed to the housing of the filter unit 5 and the pre-filter 7 is moved, the dust and dust removed by the brush 9 can be collected in one place. Since the air filters 10 and 11 are only partially overlapped with each other in a plane, the dust and dust removed from the air filters 10 and 11 are reduced by attaching the removed dust and dust to the air filters 10 and 11 again. There is little to let you do.

  Further, in the present embodiment, since the filter unit 5 is rotationally movable, the position of the filter unit 5 is not changed in a planar manner as compared with the parallel movable case of the first embodiment, and therefore, the space can be reduced.

  As in the first embodiment, the number of maintenance operations for cleaning and replacing the filter, which has frequently occurred in the past, can be significantly reduced.

  The projector device according to the present invention suppresses the rise in temperature of components in the set of devices, light source lamps, and the like caused by the filter clogging of the air intake port of the projector device and the reflection of dust on the projected image. It has the effect of reducing noise caused by an increase in the airflow of the fan, and is useful as a forced air-cooled projector device that has improved dustproof effect without reducing the cooling effect due to dust clogging of the filter unit at the air inlet .

1 is a schematic configuration diagram of a projector device according to Embodiment 1 of the present invention. 1 is an external perspective view of a projector apparatus according to Embodiment 1 of the present invention. The top view which shows the stationary state of the pre filter of the filter unit of the projector apparatus in Embodiment 1 of this invention Side view showing the same state The top view which shows the movable state of the pre filter of the filter unit of the projector apparatus in Embodiment 1 of this invention. The top view which shows the stationary state of the pre filter of the filter unit of the projector apparatus in Embodiment 2 of this invention Side view showing the same state The top view which shows the movable state of the pre filter of the filter unit of the projector apparatus in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source block 2 Optical block 3 Projection lens block 4 Intake fan 5 Filter unit 6 Exhaust fan 7 Pre filter 7a Rack 8 Drive mechanism unit 8a Motor 8b Gear 9 Brush 10 2nd air filter 11 3rd air filter 12 Rail 13 Connector 14 Position Detection switch 15 Clogging sensor 16 Rotating shaft 20 Projector device

Claims (1)

A light source block including a light source lamp that emits white light, an optical block that optically processes white light emitted from the light source block to generate an image, and an image generated by the optical block is enlarged on a screen. A projection lens unit for projecting, an intake fan that forcibly takes outside air into the optical block and the light source block that are hot and cools, and a filter that is detachable from the outside of the apparatus and has an intake port for forced air cooling In a projector device comprising a unit,
The filter unit includes a movable pre-filter, a clogging sensor that detects clogging of the pre-filter, and when clogging is detected by the clogging sensor, or when a predetermined time has passed, A drive mechanism unit for moving the pre-filter, a brush for removing dust adhering to the pre-filter, and a second air filter having a dust-proof performance with a removal particle size smaller than that of the pre-filter ,
Furthermore, the filter unit is detachable from the outside of the projector device, and is configured to be electrically connected to the projector device by a connector .

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