JP2005164767A - Projector apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling method without noise for cooling a device whose temperature is increased when a larger picture is requested hereafter and an output of a lamp as a light source is made larger in a projector device. <P>SOLUTION: The projector device is provided with the lamp as the light source, a projected light output means composed of an optical engine outputting projected light by light from the lamp and generating an image, a cooling wind supply means cooling generated heat from the lamp and the optical engine and a ventilation means which is connected between the projected light output means and the cooling wind supply means and sends cooling wind to projected light output means from the cooling wind supply means. The cooling wind supply means is installed in a position kept away and isolated from a televiewer and interrupts noise of a cooling blower fan motor in a viewing and listening room. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a projector provided with a cooling air fan motor for cooling the heat generation of an optical engine that emits light from a lamp as a light source and outputs projection light by the light of the lamp to produce an image. The present invention relates to a projector device that is intended to suppress the operation sound of the projector.

In recent years, projector apparatuses that project a projected image to a large screen have come out in response to a demand for a larger display screen. In the projector apparatus, an optical engine outputs projection light by the lamp as a light source and the light of the lamp to produce an image, and the lamp and the optical engine generate heat during the operation.

When the lamp and the optical engine rise above a certain temperature, problems such as lamp breakage and operational changes due to high heat of the optical engine occur. For this reason, the projector device needs to keep the inside of the device below a certain temperature. Therefore, a cooling blower fan motor is provided.
In the projector device, the operation sound of the cooling air fan motor feels uncomfortable for the viewer as noise. In particular, today, a projector device is used as a home theater, and audio is enjoyed together with video, and the problem of noise caused by a cooling fan motor is even more serious.

As a technique for suppressing noise of a cooling fan motor as a projector device, for example, Japanese Patent Application Laid-Open No. 2003-5289 detects an ambient temperature at a place where the projector device is installed, and sets an optimum rotational speed for an intake fan motor and an exhaust fan motor It is an invention driven by. However, according to the present invention, it is not possible to suppress noise generated when the cooling fan motor necessary for cooling the projector device is operated.

In Japanese Patent Laid-Open No. 10-238292, an exhaust direction adjusting duct is provided at the exhaust port of the projector device so that the exhaust port is not directed to the viewer, thereby making it difficult for the viewer to hear the exhaust sound. In a high-power projector device that generates a large amount of heat, the operating noise of the cooling fan motor is increased, and in this case, a sufficient effect cannot be expected.

JP2003-5289

JP 10-238292 A

In the future, projector devices will be required to have larger images, and accordingly, the devices themselves tend to be larger. Therefore, the lamp as the light source used here also has a large output and heat generation. Therefore, it is necessary to increase the output of the cooling air fan motor. However, when the output of the cooling air fan motor is increased, the noise is correspondingly increased.

In the past, in order to increase the output of the cooling air fan motor, the cooling air fan motor was increased in size and the number of rotations to increase the amount of air flow, or the number of cooling air fan motors was increased so that the objects to be cooled were localized. It was common to take measures such as cooling.
As a result, in order to prevent the noise of the cooling fan fan motor from increasing as a result, it is necessary to perform fine temperature control to control the operation of the cooling fan fan motor. Increasing the output of the cooling blower fan motor and performing precise temperature control is an adverse effect of downsizing and cost reduction of the projector apparatus.

The projector device according to the present invention includes a lamp as a light source, a projection light output unit configured by an optical engine that outputs projection light by the light from the lamp and creates an image, and generates heat from the lamp and the optical engine. The cooling air supply means for cooling, and the ventilation means for sending the cooling air from the cooling air supply means to the projection light output means are connected between the projection light output means and the cooling air supply means.

The cooling air supply means includes an intake air fan motor and an exhaust air fan motor to supply cooling air, and the projection light output means includes a temperature sensor therein to detect the temperature inside the projection light output means. A temperature detection unit, and a blower control unit that compares the temperature detected by the temperature detection unit with a preset threshold value and turns on / off the power supply from the projection light output unit to the cooling air supply unit. Features.

In the projector device of the present invention, the cooling air fan motor that generates noise is separated from the projection light output means that is the main body of the projector device, and can be installed outside the viewing room as the cooling air supply means, so that the noise can be completely cut off from the viewer. Is possible.
In addition, by shutting down the noise of the cooling air fan motor, it is possible to simplify the control circuit by eliminating the need for complicated temperature control of the cooling air fan motor that has been necessary to suppress the noise. The cost can be reduced.
Further, by separating the projection light output means and the cooling air supply means, the projection light output means installed in the viewing room can be reduced in size.

An embodiment in which the projector device 1 of the present invention is permanently installed on the ceiling of the viewing room by a fixing bracket will be described.
FIG. 1 is a perspective view showing the overall configuration of the projector apparatus 1.
In the projector apparatus 1, the projection light output means 2 is permanently installed on the ceiling of the viewing room with a mounting bracket. Cooling air supply means 3 is installed behind the ceiling to which the projection light output means 2 is fixed. The ventilation means 4 uses two bellows type hoses whose directions can be freely changed, and connects the cooling air supply means 3 and the projection light output means 2 to perform ventilation and exhaust.
The air from the cooling air supply means 3 and the power to the exhaust fan motor are supplied from the projection light output means 2 through the power supply wiring 5.

FIG. 2 is a perspective view including a partly cutout for explaining the internal structure of the projection light output means 2 of the projector apparatus 1.
The projection light output means 2 emits a lamp 6 serving as a light source for projecting an image, splits the light from the lamp 6 with a spectroscope 7, and uses the light input through the spectroscope 7 as desired projection light. Is output through an optical engine 8 and an optical lens 9 which act to output as

The lamp 6 that is a light source and the optical engine 8 that outputs projection light by the light and generates an image generate heat and become high temperature. Therefore, the projection light output unit housing 11 is provided with the air outlet 12 and the exhaust port 13 so that the cooling air efficiently circulates inside the projection light output unit 2, and the cooling air supplied from the air outlet is supplied to the lamp 6. And a guide plate 15 for guiding the optical engine 8 to the optical engine 8 and a guide plate 16 for guiding the air heated as a result of cooling to the cooling air and to the discharge port.

The cooling air is blown by detecting the cooling air temperature after the temperature sensor 10 located in the latter stage of the cooling air passage path of the lamp 6 has passed through the lamp 6 and the detected temperature is a preset threshold value. Based on the comparison, power supply from the projection output means 2 to the cooling air supply means 3 is turned on and off by the air blowing control means.

FIG. 3 is an exploded view for explaining the structure of the cooling air supply means 3 of the present invention.
FIG. 4 is a sectional view for explaining the structure of the cooling air supply means 3 of the present invention shown in FIG.

The cooling air supply means 3 includes a joint 18 for connecting the ventilation means 4 to two holes provided on one side surface of a casing 17 having a rectangular tube shape, and at both ends of the rectangular tube shape, respectively. It is equipped with a cooling air fan motor 19 that works for intake and exhaust by changing its orientation and is cylindrical and has two openings formed to fit the cooling air fan motor 19 and the joint 18 Connected by the mold duct 20 to ensure a blowing path.
Further, a dustproof filter 21 is installed on the front side of the cooling air fan motor 19 on the intake side, and a cover 22 is attached. The exhaust side has the same structure as the intake side, except that the dust filter 21 need not be attached.

Since the cooling air is blown from the cooling air supply means 3 to the projection light output means 2 in the ventilation means 4, two bellows type hoses whose directions can be freely changed for blowing and exhausting are used. Are connected to the blower and exhaust joints 18 provided in the cooling air supply means 3, and the other ends are connected to the blower opening 12 and the exhaust outlet 13 of the projection light output means 2 attached to the viewing room.
Furthermore, an electric power supply wiring 5 from the projection light output means 2 to the cooling air supply means 3 is also connected.

FIG. 5 is a flowchart showing the control method of the air blowing control means provided in the projection light output means 2 of the projector apparatus of the present invention.
In step S1, the projector apparatus 1 is turned on.
In step S2, the temperature sensor 10 located in the rear stage of the lamp 6 in the cooling air passage in the projection light output means 2 detects the temperature of the cooling air after passing through the lamp.
In step S3, the air blowing control unit incorporated in the projection light output unit 2 compares the detected temperature with a preset threshold value. The threshold value means an optimum temperature at which the projector device operates in the vicinity where the temperature sensor of the projection light output means is installed.
In step S4, if the detected temperature is higher than the threshold value as a result of the comparison, supply of electric power necessary for the operation of the blower fan motor and the exhaust fan motor to the cooling air supply unit 2 is started. .
In step S5, when the detected temperature is lower than the threshold value as a result of the comparison, the supply of power to the cooling fan supply unit and the exhaust fan motor is stopped.
As a result of the comparison, after executing step S4 or step S5, the process returns to step S2 again after a certain period of time and a series of operations is repeated.

Since the projector apparatus 1 includes the cooling air supply means 3, the lamp 6 and the optical engine 8 and the like are overheated, causing no problem or damage to their operation.
In addition, since the cooling air supply means 3 can be installed at a position separated from the projection light output means 2, the noise from the cooling fan motor 19 generated when the cooling air supply means 3 is operated is observed in the viewing room. It is possible to completely shut off in
Further, since complicated temperature control for suppressing noise generation is not required by blocking noise, the control circuit can be simplified, and the cost can be reduced accordingly.

1 is a perspective view showing an overall configuration of a projector apparatus according to the present invention. The perspective view containing the notch which shows the structure of the projection light output means of this invention. The perspective view which shows the structure of the cooling air supply means of this invention. Sectional drawing which shows the structure of the cooling air supply means of this invention. The flowchart figure which shows the method of the temperature control means of this invention.

Explanation of symbols

1: projector device 2: projection light output means 3: cooling air supply means 4: ventilation means 5: electric wiring for power supply 6: lamp 7: spectrometer 8: optical engine 9: optical lens 10: projection light output means housing Body 11: Air outlet 12: Air outlet 13: Lamp air guide plate 14: Optical engine air guide plate 15: Air exhaust air guide plate 16: Cooling air supply means Housing 17: Joint 18: Cooling air fan motor 19 : L-shaped duct 20: Dustproof filter 21: Cover

Claims (3)

Projection light output means comprising a lamp as a light source, an optical engine that outputs projection light by the light from the lamp to produce an image, and cooling air supply means for cooling heat generated from the lamp and the optical engine And a projector for connecting the projection light output means and the cooling air supply means, and a ventilation means for sending the cooling air from the cooling air supply means to the projection light output means. The projector apparatus according to claim 1, wherein the cooling air supply means includes a blower fan motor and an exhaust fan motor. The projection light output means is provided with a temperature detection means for detecting the temperature therein, and is cooled from the projection light output means based on a comparison between the temperature detected by the temperature detection means and a preset threshold value. The projector apparatus according to claim 1, further comprising a blower control unit that turns on and off the power supply to the wind supply unit.

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