JP2017053952A - Projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type display device that can reduce deterioration of a light source during vertical placement projection and is more compact.SOLUTION: A projector comprises a light source unit 1 comprising a light emission tube, a lamp cooling fan, a light source cooling duct A17, and a light source cooling duct C19. Further, the projector comprises a light source cooling duct B18 having an opening capable of being opposed to an opening of the light source cooling duct A17, and a light source cooling duct D20 having an opening capable of being opposed to an opening of the light source cooling duct C19. Then the light source unit 1 can be attached to and detached from the projector, and the light source cooling duct B18 and light source cooling duct D20 can be attached to and detached from the light source unit 1. Further, the projector is configured to be released from a state in which the openings of the respective ducts are opposed to each other as the light source unit 1 is detached.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a projection display device.

  In recent years, projectors have been used in a variety of postures other than standing on a desk or the like, and hanging from a ceiling using a dedicated fixture. For example, in event venues, there is a demand for projection methods such as upward projection and downward projection projected onto the ceiling or floor. In the field of advertising, there is also a demand for a projection method in which a projection screen is vertically long in order to display a person, a tower, or the like by vertical projection (portrait projection).

  On the other hand, high-pressure mercury lamps, which are mainly used as light sources for projectors, need to cool the arc tube because the arc tube emits heat together with the light. And changes with the attitude of the projector. Specifically, high-temperature steam stays in the arc tube, and when the arc tube is not horizontal, the high-temperature vapor gathers at a higher position and becomes high temperature. As a result, one of the two electrodes that is close to the high temperature portion deteriorates faster than the other, which is not preferable.

  As techniques for solving such a problem, techniques described in Patent Document 1 and Patent Document 2 are known. Patent Document 1 discloses a configuration in which cooling wind is guided to a higher position on the surface of the arc tube during stationary, ceiling-mounting, and vertical projection by using a wind-shielding sphere that enters the receiving portion according to the direction of gravity. ing. Patent Document 2 discloses a configuration in which the lamp and the cooling system for the lamp are rotated during vertical projection to keep the arc tube horizontal during vertical projection.

JP 2011-253156 A JP 2011-203590 A

  If the vertical projection is performed with the configuration shown in Patent Document 1, the wind-shielding ball blocks the cooling air to the arc tube, and the arc tube may not be sufficiently cooled. Further, in the configuration in which the lamp and the cooling system are rotated as in the configuration shown in Patent Document 2, a space for allowing the rotation operation is required, and the entire projector may be increased in size.

  Accordingly, an object of the present invention is to provide a more compact projection display device that can reduce deterioration of a light source during vertical projection.

In order to achieve the above object, a projection display device according to the present invention provides:
A light source unit comprising an arc tube,
Air blowing means;
A first duct for guiding the fluid from the blowing means toward the light source unit;
A second duct for guiding the fluid from the blowing means toward the light source unit;
A third duct having an opening capable of facing the opening on the light source unit side of the first duct, and guiding the fluid from the first duct to the arc tube;
A projection display device comprising: a fourth duct having an opening capable of facing the opening on the light source unit side of the second duct and guiding the fluid from the second duct to the arc tube. Because
The light source unit is detachable from the projection display device,
The third duct and the fourth duct are detachable from the light source unit,
When the light source unit is detached from the projection display device, the opening on the light source unit side of the first duct and the opening on the first duct side of the third duct face each other. And the state where the opening on the light source unit side of the second duct and the opening on the second duct side of the fourth duct are opposed is released,
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to reduce deterioration of the light source at the time of vertical installation projection, a more compact projection type display apparatus can be provided.

Schematic diagram of a projection display device Perspective view of lamp cooling configuration diagram Cross-sectional view of lamp cooling configuration during installation (viewed along reflector optical axis) Cross-sectional view of lamp cooling configuration when facing upward (viewed along reflector optical axis) Cross-sectional view of the lamp cooling configuration when suspended from the ceiling (viewed along the reflector optical axis) Cross-sectional view of lamp cooling configuration when facing downward (viewed along reflector optical axis) Sectional view of the lamp cooling configuration during installation (viewed perpendicular to the reflector optical axis) Sectional view of the lamp cooling configuration when installed vertically (viewed perpendicular to the reflector optical axis) Explanatory diagram of preferable conditions for lamp cooling configuration Sectional drawing of lamp cooling configuration in another embodiment (viewed in the direction orthogonal to the reflector optical axis)

  Preferred embodiments of the present invention will be illustratively described below with reference to the drawings. However, the relative arrangement of the component parts described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions. That is, the present invention is not limited to the embodiments described later, and various modifications and changes can be made within the scope of the gist.

(Configuration of projection display device)
First, the configuration of a projector (projection display device) according to an embodiment of the present invention will be described with reference to FIG.

  In FIG. 1, α is an illumination optical system that receives light from a light source unit 1 described later, and includes a first fly-eye lens, a second fly-eye lens, a polarization conversion element, and a condenser lens. β is a color separation / combination optical system that guides light from the illumination optical system α to a liquid crystal panel for each color of RGB (not shown), and includes a dichroic mirror, a polarization beam splitter for G, a polarization beam splitter for RB, and a color synthesis prism. ing.

  Reference numeral 25 denotes a mirror that reflects light from the illumination optical system α and guides it to the color separation / synthesis optical system β. The optical axis of the color separation / synthesis optical system β is perpendicular to the optical axis of the illumination optical system α by the mirror 25. Therefore, it is possible to suppress the entire projector from being horizontally long.

  A light source unit 1 includes an arc tube 26 and a parabolic reflector (reflector) 27 that reflects light from the arc tube 26. Instead of the paraboloid reflector 27, an elliptical reflector and a negative lens may be used. Reference numeral 2 denotes a projection lens unit that guides outgoing light from the color separation / synthesis optical system β to a screen (projected surface) SC.

  Reference numeral 3 denotes an intake port including an air filter (not shown) that suppresses the entry of dust into the housing when the outside air is inhaled. Reference numeral 4 denotes a cooling unit for cooling the light source unit 1 using the external air drawn from the intake port 3. Lamp cooling fan (air blowing means).

  Reference numeral 5 denotes an illumination optical system cooling fan that cools the illumination optical system α using outside air sucked from the intake port 3. Reference numeral 6 denotes a color separation / synthesis optical system cooling fan that cools the color separation / synthesis optical system β using outside air sucked from the intake port 3.

  Reference numeral 7 denotes an exhaust fan that exhausts high-temperature air inside the enclosure to the outside of the enclosure, 8 denotes a power supply unit that supplies power to the light source unit 1, and 9 controls the amount of power supplied to the light source unit 1. Light source power changing means. By the light source power changing means 9, the projector can take the normal mode and the eco mode.

  Reference numeral 10 denotes a temperature detection sensor that detects the ambient temperature of the projector. Specifically, the temperature sensor 10 is an IC that outputs a voltage proportional to the temperature, and appropriately detects the ambient temperature of the exterior cabinet 13 described later. Provided in position. In the embodiment of the present invention, the temperature sensor 10 is provided in the vicinity of the air inlet 3.

  Reference numeral 11 denotes an attitude detection sensor (attitude detection means) that detects the attitude of the projector, and the attitude detection sensor 10 is an IC that detects a rotational motion, converts it into an electrical signal, and outputs it. The posture detection sensor 11 determines which posture the projector is in from among stationary, ceiling-mounted, vertical projection, and vertical, by comparing the detected value with a predetermined threshold value.

  Reference numeral 12 denotes a control device, which is composed of a CPU, a ROM, etc., and detects the projection mode (normal mode or eco mode) of the projector input by the user according to a program stored in the control device 12 to change the light source power. 9 is controlled. The control device 12 has at least two or more threshold values in order to identify each posture and each projection mode in advance. Reference numeral 13 denotes an exterior cabinet for storing 1 to 12 described above. Reference numeral 31 denotes air volume control means for controlling the lamp cooling fan 4 based on the information from the attitude detection sensor 11 described above.

(Lamp cooling configuration)
The lamp cooling configuration will be described with reference to FIG.

  In FIG. 2, reference numeral 14 denotes a light source holding unit that holds the above-described light source unit 1, and reference numeral 15 denotes a light source holding cover for preventing the heat of the lamp 1 that becomes high temperature from adversely affecting the housing. The arc tube 26, the reflector 27, the light source holding part 14, and the light source holding cover 15 are collectively referred to as the light source unit 1. Reference numeral 16 denotes an explosion-proof glass for preventing glass pieces from scattering inside the housing when the lamp bursts.

  Reference numeral 17 denotes a light source cooling duct A (first duct) fixed to an optical engine that holds an optical element (not shown), and 18 denotes a light source cooling duct B (third duct) fixed to the light source holding unit 14. is there. The light source cooling duct A17 and the light source cooling duct B18 are collectively referred to as a first duct structure. Further, as will be described in detail later, the light source cooling duct B18 can be replaced with a vertical light source cooling duct B23 shown in FIG. The light source cooling duct A17 and the light source cooling duct B18 are not fastened and can be divided.

  Reference numeral 19 denotes a light source cooling duct C (second duct) fixed to an optical engine that holds an optical element (not shown), and 20 denotes a light source cooling duct D (fourth duct) fixed to the light source holding part 14. is there. The light source cooling duct C19 and the light source cooling duct D20 are collectively referred to as a second duct structure. Further, as will be described in detail later, the light source cooling duct D20 can be replaced with a vertically installed light source cooling duct D24 shown in FIG. The light source cooling duct C19 and the light source cooling duct D20 are not fastened and can be divided.

  Reference numeral 21 denotes a sirocco fan (first fan) that guides the fluid to the light source cooling duct A17, and is mainly used at the time of installation, upward, and vertical installation. Reference numeral 22 denotes a sirocco fan (second fan) that guides fluid to the light source cooling duct C19, and is mainly used when suspended from the ceiling, downward, or vertically. The lamp cooling fan 4 as the air blowing means includes a sirocco fan 21 and a sirocco fan 22.

  Next, a cooling method of the light source unit 1 in each posture such as stationary projection, ceiling projection, vertical projection, and vertical projection will be described.

(Deferred projection)
FIG. 3 is a diagram showing the cooling of the light source unit 1 during stationary projection, and assumes a case where a projector is installed on a desk or the like and projected in the left direction on the paper surface.

  In FIG. 3, g is the direction of gravity, d is the projection direction (the optical axis direction of the projection lens), S1 is the bottom surface of the projector, S2 is the top plate of the projector, and hs1 is the surface of the arc tube 26. It is the position of the high temperature part that becomes high temperature.

  As described above, high-temperature steam stays in the arc tube 26, and this vapor is directed upward (opposite to the direction of gravity). Therefore, the position of the high-temperature portion is the surface of the arc tube 26 during stationary projection. Hs1 at a higher position of the position hs1, and the position hs1 needs to be sufficiently cooled. In the embodiment of the present invention, the sirocco fan 21 mainly contributes to the cooling of the light source unit 1 during stationary projection, and as indicated by the arrow in FIG. 3, the arc tube 26 is heated at a high temperature mainly by the fluid from the light source cooling duct B18. The part can be cooled.

(Upward projection)
FIG. 4 is a diagram showing a state of cooling of the light source unit 1 during upward projection, and assumes a case where a projector is installed on a desk or the like and projected onto the ceiling in the upward direction on the paper surface. Compared to the above-described stationary projection, the high temperature portion is located at a higher position on the surface of the arc tube 26 due to the high-temperature steam in the arc tube 26, but the high temperature portion is not located at the position hs1 during upward projection. It is different in that it is located at hs2. In the embodiment of the present invention, the sirocco fan 21 mainly contributes to the cooling of the light source unit 1 during upward projection, and as indicated by the arrow in FIG. The part can be cooled.

(Ceiling projection)
FIG. 5 is a diagram showing a state of cooling of the light source unit 1 during the ceiling projection, and it is assumed that the projector is suspended from the ceiling by a dedicated fixture and projected in the right direction on the paper surface. As shown in FIG. 5, the high temperature portion is located at hs3 on the light source cooling duct D20 side as compared with the above-described stationary projection. For this reason, in the embodiment of the present invention, the sirocco fan 22 mainly contributes to cooling of the light source unit 1 during the ceiling projection and emits light mainly by the fluid from the light source cooling duct D20 as shown by the arrows in FIG. It becomes possible to cool the high temperature part of the pipe 26.

(Downward projection)
FIG. 6 is a diagram illustrating a state of cooling of the light source unit 1 during downward projection, and it is assumed that the projector is suspended from the ceiling by a dedicated fixture and projected onto the ground. Compared with the above-described upward projection, the high temperature portion is located at hs4 on the light source cooling duct D20 side. For this reason, in the embodiment of the present invention, the sirocco fan 22 mainly contributes to the cooling of the light source unit 1 during the ceiling projection, and emits light mainly by the fluid from the light source cooling duct D20 as shown by the arrows in FIG. It becomes possible to cool the high temperature part of the pipe 26.

  As described above, according to the embodiment of the present invention, it is possible to guide the fluid from the sirocco fan 21 and the sirocco fan 22 to the position of the high temperature portion that differs depending on each posture during stationary projection, ceiling projection, and vertical projection. It becomes.

(Vertical projection)
Next, cooling of the light source unit 1 during vertical projection will be described with reference to FIGS. 7 and 8.

  FIG. 7 is a view showing the cooling state during stationary projection as in FIG. 3, whereas FIG. 3 is a view of the reflector 27 as viewed in the optical axis direction, whereas FIG. It is a figure of the direction view orthogonal to an optical axis. As described above, the high temperature portion on the surface of the bulb portion 32 included in the arc tube 26 is located at hs1 during stationary projection. For this reason, the light source cooling duct B18 is configured to guide the fluid from the sirocco fan 21 in the direction d1 so that the fluid from the sirocco fan 21 is guided to the position hs1. Similarly, the light source cooling duct D20 is configured to guide the fluid from the sirocco fan 22 in the direction d2.

  On the other hand, at the time of vertical projection shown in FIG. 8, the high temperature portion on the surface of the tube portion 32 is located at hs5 different from the position hs1, so the light source cooling duct B18 and the light source cooling duct D20 have high temperature portions at the time of vertical projection. May not be sufficiently cooled. Therefore, in the embodiment of the present invention, during vertical projection, the light source cooling duct B18 is replaced with the light source cooling duct B23 (fifth duct), and the light source cooling duct D20 is replaced with the light source cooling duct D24 (sixth duct). Exchange.

  The light source cooling duct B23 is configured to be able to guide the fluid from the sirocco fan 21 in the direction d3, and the direction d3 is inclined to the explosion-proof glass 16 side with respect to the direction d1. The light source cooling duct D24 is configured to be able to guide the fluid from the sirocco fan 22 in the direction d4, and the direction d4 is inclined to the explosion-proof glass 16 side with respect to the direction d2. By using the light source cooling duct B23 and the light source cooling duct D24 having such a configuration, it is possible to sufficiently cool the high-temperature portion during vertical projection.

  That is, the projector includes a light source cooling duct A17 as a first duct that guides the fluid from the lamp cooling fan 4 as a blowing means toward the light source unit 1, and a light source cooling duct C19 as a second duct. Further, the projector has an opening that can face the opening on the light source unit 1 side of the light source cooling duct A17, and the light source cooling duct as a third duct that guides the fluid from the light source cooling duct A17 to the arc tube 26. B18 is provided. Further, the projector has an opening that can face the opening on the light source unit 1 side of the light source cooling duct C19, and the light source cooling duct as a fourth duct that guides the fluid from the light source cooling duct C19 to the arc tube 26. D20 is provided.

  The light source unit 1 is detachable from the projector, and the light source cooling duct B18 and the light source cooling duct D20 are detachable from the light source unit 1. Further, in the projector, as the light source unit 1 is removed from the projector, the opening on the light source unit 1 side of the light source cooling duct A17 and the opening on the light source cooling duct A17 side of the light source cooling duct B18 face each other. It is configured to be released. Further, in the projector, as the light source unit 1 is removed from the projector, the opening of the light source cooling duct C19 on the light source unit 1 side and the opening of the light source cooling duct D20 on the light source cooling duct C19 side face each other. It is configured to be released.

  Here, the opening on the light source unit side and the opening on the duct side are opposed to each other, the opening on the light source unit 1 side (first opening) of the light source cooling duct A17 and the light source cooling duct of the light source cooling duct B18. In other words, the opening (second opening) on the A17 side is in contact. Furthermore, it may be paraphrased that the first opening and the second opening are entirely or partially overlapped in the fluid direction view. The cancellation of the state in which the first opening and the second opening are opposed to each other means that the positional relationship between the first opening and the second opening is changed as described above. In other words, the first opening and the second opening do not overlap each other.

  With the configuration described above, the light source unit 1 is removed from the housing, the light source cooling duct B18 fastened to the light source unit 1 is replaced with the vertical optical cooling duct B23, and the light source cooling duct D20 is replaced with the vertical optical cooling duct. 24 can be exchanged. Further, since the light source cooling duct B18 and the light source cooling duct D20, which are short portions at the front end of the duct structure, are attached to the light source unit 1 so that they can be removed from the projector together with the light source unit 1, the duct can be easily replaced. Will be able to.

  Thereby, since the cooling air can be applied to the high temperature part of the lamp whose position changes in each posture such as stationary, ceiling-mounted projection, vertical projection, and vertical projection, it is possible to reduce deterioration of the light source. In addition, since it is not necessary to provide a rotation mechanism as described in Patent Document 2, it is possible to realize a smaller projector.

(More preferred configuration)
Hereinafter, a more preferable configuration will be described. FIG. 9 is a diagram collectively showing the positions hs1 to hs4 of the high temperature part during the stationary projection, the ceiling projection, and the vertical projection shown in FIGS. As shown in FIG. 9, when the reflector 27 is viewed in the optical axis direction, the high temperature portion during stationary projection, ceiling projection, and vertical projection is located on a concentric circle on the surface of the tube portion 32. For this reason, the light source cooling duct B18 and the light source cooling duct D20 are arranged so as to be shifted in phase so as to be symmetrical with respect to the optical axis when viewed from the optical axis direction of the reflector 27. Thereby, even if it is the same duct structure, it becomes possible to fully cool the positions hs1 to hs4 of the high temperature portions which are different in the postures of stationary projection, ceiling projection and vertical projection.

  In other words, the light source unit 1 includes a reflector 27 that reflects light from the arc tube 26. The projector is configured such that the opening of the light source cooling duct B18 on the light source unit 1 side and the opening of the light source cooling duct D20 on the light source unit 1 side face each other when the reflector 27 is viewed in the optical axis direction.

In addition, when the reflector 27 is viewed in the optical axis direction, an angle formed between the end surface of the light source cooling duct B18 on the light source unit 1 side and the bottom surface S1 of the projector is θ1, and the end surface of the light source cooling duct D20 on the light source unit 1 side and the bottom surface of the projector. When the angle formed by S1 is θ2,
35 ≦ θ1 ≦ 55 °
35 ≦ θ2 ≦ 55 °
Is preferable.

further,
40 ≦ θ1 ≦ 50 °
40 ≦ θ2 ≦ 50 °
Is more preferable. In other words, it is preferable to guide the fluid to the arc tube 26 from two opposing directions inclined at approximately 45 ° with respect to the bottom surface or the installation surface of the projector 27 when viewed in the optical axis direction of the reflector 27. As a result, as described above, even in the same duct structure, it is possible to sufficiently cool the positions hs1 to hs4 of the high temperature portions that are different in each posture.

  In addition to the attitude detection sensor 11 that detects the attitude of the light source unit 1 described above, the projector also includes an air volume control means 31 that controls the lamp cooling fan 4 based on information from the attitude detection sensor 11. Is preferred.

  Furthermore, the lamp cooling fan 4 includes a sirocco fan 21 (first fan) that guides fluid to the light source cooling duct A17 and a sirocco fan 22 (second fan) that guides fluid to the light source cooling duct C19. Is preferred. Further, the air volume control means 31 controls both fans so that the rotation speed per unit time of one of the sirocco fan 21 and the sirocco fan 22 is higher than the rotation speed per other unit time. It is preferable to do. The high position here means a position that is further away in the direction opposite to the direction of gravity. In addition, the air volume control means 31 may increase the rotational speeds of both fans when the temperature detection sensor 10 determines that the temperature inside the projector is equal to or higher than a predetermined temperature.

  By adopting such a configuration, it is possible to cool different high-temperature parts in each posture and reduce noise and power consumption compared to the case where both the sirocco fan 21 and the sirocco fan 22 are moved at the same rotational speed. It becomes possible to do. Further, it is preferable to use a sirocco fan as the lamp cooling fan 4 because the directivity of the fluid can be increased and more fluid can be sprayed to a desired position.

  Alternatively, only the sirocco fan 21 may be operated when the posture detection sensor 11 determines that the projector is in the posture of stationary projection or upward projection. When it is determined that the projector is in the ceiling-mounted projection or the downward projection posture, only the sirocco fan 22 may be operated. Of course, both the sirocco fan 21 and the sirocco fan 22 may be operated regardless of the projection posture as in the embodiment of the present invention.

(Other embodiments)
In the above-described embodiment, the configuration in which the duct is replaced with a dedicated one when performing vertical projection is disclosed, but the present invention is not limited to this. For example, as shown in FIG. 10, it may be configured to include an air guide unit 28 and an air direction control unit 29 that controls the air guide unit 28.

  In FIG. 10, the air guiding means 28 includes a direction in which the first duct structure guides the fluid from the lamp cooling fan 4 to the light source unit 1, and the second duct structure directs the fluid from the lamp cooling fan 4 to the light source unit 1. It is a plurality of fins that can change the guiding direction and can rotate. The wind direction control means 29 controls the wind guide means 28 based on information from the attitude detection sensor 11. Here, the first duct structure is the light source cooling duct A17 and the light source cooling duct B18, and the second duct structure is the light source cooling duct C19 and the light source cooling duct D20. .

  The configuration shown in FIG. 10 is more preferably the following configuration. That is, when the light source unit 1 is in a predetermined posture, the direction in which the fluid from the first duct structure is guided to the light source unit 1 is the first direction, and the fluid from the second duct structure is the light source unit 1. The guided direction is defined as the second direction. Then, it is assumed that the posture detection sensor 11 determines that the light source unit 1 is in a posture in which the angle formed by the optical axis of the reflector 27 and the projector installation surface is larger than a predetermined posture. The predetermined posture here is the posture of the light source unit 1 at the time of stationary projection, and the posture in which the angle formed by the optical axis of the reflector 27 and the installation surface of the projector is larger than the predetermined posture. This is the posture of the light source unit 1 during the standing projection.

  At this time, the wind direction control means 29 controls the wind guide means 28 so that the fluid from the first duct structure is guided to a position farther from the installation surface than in the first direction. Further, the air guide means 28 is controlled so that the fluid from the second duct structure is guided to a position farther from the installation surface than in the second direction.

  By adopting such a configuration, the projector can adjust the wind direction from the first duct structure and the second duct structure according to the attitude of the projector without replacing the duct member. As a result, it is possible to reduce the deterioration of the light source during vertical projection and to realize a smaller projector.

1 Lamp (light source unit)
4 Lamp cooling fan (air blowing means)
17 Light source cooling duct A (first duct)
18 Light source cooling duct B (third duct)
19 Light source cooling duct C (second duct)
20 Light source cooling duct D (fourth duct)
26 arc tube

Claims (9)

A light source unit comprising an arc tube,
Air blowing means;
A first duct for guiding the fluid from the blowing means toward the light source unit;
A second duct for guiding the fluid from the blowing means toward the light source unit;
A third duct having an opening capable of facing the opening on the light source unit side of the first duct, and guiding the fluid from the first duct to the arc tube;
A projection display device comprising: a fourth duct having an opening capable of facing the opening on the light source unit side of the second duct and guiding the fluid from the second duct to the arc tube. Because
The light source unit is detachable from the projection display device,
The third duct and the fourth duct are detachable from the light source unit,
When the light source unit is detached from the projection display device, the opening on the light source unit side of the first duct and the opening on the first duct side of the third duct face each other. And the state where the opening on the light source unit side of the second duct and the opening on the second duct side of the fourth duct are opposed is released,
A projection type display device characterized by that. The light source unit is detachable from the light source unit in place of the third duct and the fourth duct, and fluid from the first duct is used for the fluid from the first duct. And a fifth duct capable of guiding the fluid from the duct to the arc tube in a direction different from the direction leading to the arc tube, and being detachable from the light source unit, and from the second duct A sixth duct capable of guiding the fluid to the arc tube in a direction different from the direction in which the fourth duct guides the fluid from the second duct to the arc tube. Configured to be attachable,
The projection display device according to claim 1. The light source unit includes a reflector that reflects light from the arc tube,
The light source unit side opening of the third duct and the light source unit side opening of the fourth duct are configured to face each other when viewed in the optical axis direction of the reflector.
The projection display device according to claim 1, wherein: When viewed from the optical axis direction, an angle formed between the end surface of the third duct on the light source unit side and the bottom surface of the projection display device is θ1, and the end surface of the fourth duct on the light source unit side and the projection When the angle formed with the bottom of the mold display device is θ2,
35 ≦ θ1 ≦ 55 °
35 ≦ θ2 ≦ 55 °
The projection display device according to claim 3, wherein: Attitude detecting means for detecting the attitude of the light source unit;
An air volume control means for controlling the air blowing means based on information from the posture detection means,
The projection type display device according to claim 1, wherein the projection type display device is a projection type display device. The air blowing means includes a first fan that guides fluid to the first duct, and a second fan that guides fluid to the second duct,
The air volume control means is configured to control the first fan and the second fan so that one of the first fan and the second fan at a higher position has a higher rotational speed than the other rotational speed. To control the
The projection display device according to claim 5, wherein: The first fan and the second fan are sirocco fans,
The projection display device according to claim 6. A light source unit;
Attitude detecting means for detecting the attitude of the light source unit;
Air blowing means;
A first duct structure for guiding the fluid from the blowing means toward the light source unit;
A second duct structure for guiding the fluid from the blowing means toward the light source unit;
The air guiding means capable of changing the direction in which the first duct structure guides the fluid from the air blowing means to the light source unit and the direction in which the second duct structure guides the fluid from the air blowing means to the light source unit. When,
Wind direction control means for controlling the air guide means based on information from the posture detection means,
A projection type display device characterized by that. The light source unit includes an arc tube and a reflector that reflects light from the arc tube,
When the light source unit is in a predetermined posture, the direction in which the fluid from the first duct structure is guided to the light source unit is the first direction, and the fluid from the second duct structure is the light source unit. The guided direction is the second direction,
When the posture detection means determines that the light source unit is in a posture such that an angle formed between the optical axis of the reflector and the installation surface of the projection display device is larger than the predetermined posture,
The wind direction control means guides the fluid from the first duct structure to a position further away from the installation surface than when it is in the first direction, and more than when it is in the second direction. Controlling the air guide means so that the fluid from the second duct structure is guided to a position away from the installation surface;
The projection display device according to claim 8.

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