JP2003005293A - Projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently cool an optical system with a small amount of airflow in a projector device that guides light from a light source to the optical system and generates color video light to enlarge and project it on a front screen. SOLUTION: In the projector device, a cooling unit 6 is arranged along the optical system. The cooling unit 6 is provided with a plurality of cooling fans 66, 67 and 68, a plurality of trunk air outlets 69, 63, 64 and 65 opened toward high temperature parts created at a plurality of locations of the optical system, and a passage network 8 for guiding airflows from the cooling fans 66, 67 and 68 to the trunk air outlets 69, 63, 64 and 65. The passage network 8 is provided with a plurality of passages to allocate the amount of airflow to be blown out from each trunk air outlet to the high temperature parts of the optical system according to the temperatures of the high temperature parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device that guides light from a light source to an optical system to generate color image light and projects the color image light on a front screen in an enlarged manner.

[0002]

2. Description of the Related Art A projector device of this type is constructed by arranging a lamp as a light source and an optical system composed of a polarizing beam splitter, a polarizing plate, a liquid crystal panel, a projection lens and the like inside a casing. However, since heat is generated from the polarization beam splitter and liquid crystal panel that make up the optical system, a cooling fan is installed inside the casing,
The entire optical system is cooled by flowing the air inside the casing.

[0003]

However, in a projector device capable of projecting a high-luminance image, the amount of heat generated from the optical system is large, so that the cooling fan is rotated at a high speed to reduce the amount of cooling air. Therefore, there is a problem that the noise generated from the cooling fan increases. Therefore, an object of the present invention is to provide a projector device capable of sufficiently cooling an optical system with a small amount of air flow and reduce noise from a cooling fan.

[0004]

In the projector device according to the present invention, a cooling unit (6) is arranged along the optical system, and the cooling unit (6) is provided with one or a plurality of intake air for taking in outside air. A window, one or a plurality of cooling fans that take in and discharge outside air from the intake window, a plurality of air outlets that open toward high temperature portions that occur at a plurality of locations of the optical system, and the cooling fan. And a flow path network (8) for guiding the air to the plurality of air outlets, and the flow path network (8) has an air flow rate to be blown from each air outlet toward the high temperature part of the optical system. Are provided according to the temperature of the high temperature part.

In the projector device of the present invention described above, a plurality of air outlets are opened toward the high temperature portions generated at a plurality of locations of the optical system, and at the same time, the air outlets are provided from the outlets of one or a plurality of cooling fans. Since a flow path network (8) consisting of multiple flow paths leading to the optical system is formed, the outside air taken in from the intake window is blown directly from each air outlet to the high temperature part of the optical system by the operation of the cooling fan. , The high temperature part of the optical system is intensively cooled. Naturally, the flow path network (8)
The multiple flow paths of the multiple flow paths are adjusted so that the volume of airflow to be blown from each air outlet to the high temperature part of the optical system is distributed according to the temperature of the high temperature part. The part is cooled to a substantially uniform temperature. Therefore, it is possible to perform sufficient cooling with a smaller amount of air as compared with the conventional case in which the entire optical system is cooled by simply causing the air in the casing to flow.

In a specific configuration, each air outlet of the cooling unit (6) is provided with an airflow guide wall for guiding the wind direction of the airflow to be blown toward the center position of the high temperature part of the optical system. . As a result, the high temperature portion of the optical system is cooled more efficiently.

Further, in a specific configuration, the cooling unit
(6) is configured by installing the one or more cooling fans in the housing (60) and installing a partition wall for forming the flow path network (8). The plurality of air outlets are opened on the surface facing the optical system. According to the specific configuration, the low temperature air flowing inside the housing (60) and the high temperature air existing outside the housing (60) are blocked by the wall surface of the housing (60) and mixed with each other. Therefore, the high temperature part of the optical system can be sufficiently cooled by the low temperature air.

In a more specific configuration, the optical system includes a polarization beam splitter (24) to which light from a light source should enter.
And a plurality of separation mirrors for separating the light passing through the polarization beam splitter (24) into lights of three primary colors, and three liquid crystals for the three primary colors through which the lights of the three primary colors separated by the separation mirrors should respectively pass. Color image light from the panel (32) (35) (38), color combining prism (30) that combines the image light of the three primary colors from the three liquid crystal panels into color image light, and color image light from the color combining prism (30) And a projection lens (20) for enlarging and projecting, the cooling unit (6) has, as the plurality of air outlets, one air outlet (69) for blowing air to the polarization beam splitter (24) and 3 Three air outlets (63) (64) (65) for blowing air to the liquid crystal panels (32) (35) (38) are provided. According to the specific configuration, four high temperature parts generated in the optical system, that is, the polarization beam splitter (24) and the high temperature part 3
The liquid crystal panels (32) (35) (38) are four air outlets.
(69) (63) (64) (65) is intensively cooled by the air blown out.

Here, since the blue liquid crystal panel (32) has the highest temperature, the flow channel network (8) is set so that the amount of airflow to be blown to the blue liquid crystal panel (32) is set to the maximum. Has been adjusted. As a result, the four high temperature parts are cooled to substantially equal temperatures.

[0010]

According to the projector device of the present invention, the optical system can be sufficiently cooled with a small amount of air, so that the noise from the cooling fan can be reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A liquid crystal projector according to the present invention will be described below.
Embodiments specifically described with reference to the drawings
Itoverall structure The liquid crystal projector according to the present invention, as shown in FIG.
Flat case consisting of half case (11) and upper half case (12)
The casing (1) and the front panel (13) of the casing (1).
The projection window (14) is opened and the lamp unit
An exhaust hole (15) for warm air discharged from the knit has been opened.
It Inside the casing (1), as shown in FIGS.
An optical unit for generating color image light (2)
And a lamp unit (4) that serves as a light source for the optical unit (2)
And a cooling unit for cooling the optical unit (2)
(6) and are deployed.

[0012]Optical unit (2) The optical unit (2) is a lamp unit as shown in FIG.
The white light from (4) is sent to the first integrator (21) and the first
Beam (22), second integrator (23) and polarized beam sp
After passing through the litter (24), lead to the blue two-color separation mirror (25),
This separates the blue light. Also, two-color separation mirror for blue
-Direct the light that passed through (25) to the two-color separation mirror for green (27),
This separates the green light. Two-color separation mirror for blue (2
The blue light separated by 5) goes through the second mirror (26)
It enters the color synthesizer (3). Also, two-color separation mirror for green (2
The green light separated by 7) enters the color synthesizer (3).
Then, the red light enters the color synthesizer (3) through the third mirror (28).
Shoot.

The blue light incident on the color synthesizer (3) is incident on the blue incident side polarizing plate (31) of the color synthesizer (3) and the blue liquid crystal panel (3).
2), and the output side polarization plate for blue (33), then the color synthesis prism
Guided by (30). The green light incident on the color synthesizer (3) is incident on the green incident side polarizing plate (34), the green liquid crystal panel (35), and the green emitting side polarizing plate (36). Then, the light is guided to the color synthesis prism (30). Further, the red light incident on the color synthesizing device (3) receives the red incident side polarization plate (3) of the color synthesizing device (3).
7), the liquid crystal panel for red (38), and the emission side polarization plate (39) for red, and is guided to the color synthesis prism (30). Color synthesis prism
The three colors of image light guided to (30) are combined by the color combining prism (30), and the color image light obtained by this is
It is enlarged and projected on the screen in front through the projection lens (20).

[0014]Lamp unit (4) As shown in FIG. 7, the lamp unit (4) has a housing (4
An ultra-high pressure mercury lamp (5) is installed in 1).
An exhaust fan (40) is installed behind (5).
It The ultra-high pressure mercury lamp (5) has a reflector (51) and a reflector.
A light emitting part (50) provided at the focal position of the deflector (51),
A transparent plate (53) that covers the opening of the reflector (51).
The lower end of the translucent plate (53) has a reflector.
-In the width direction of the translucent plate (53) between the opening edge of the (51)
A long and narrow air inlet (52) is opened and the light is transmitted.
At the top edge of the plate (53) is the opening edge of the reflector (51).
And a narrow space that extends in the width direction of the translucent plate (53).
The Qi Outlet (54) is open. In addition, with the air inlet (52)
Each of the air outlets (54) is connected to the light emitting part (50) of the lamp (5).
It has an opening shape that is inclined toward.

As shown in FIG. 6, on the upper wall of the housing (41), one elongated first intake air extending in the front-rear direction is provided at one end in the width direction orthogonal to the optical axis (front-rear direction) of the lamp. Window (45)
And a plurality of elongated second intake windows (46) extending in the front-rear direction are provided at the center in the width direction.
Also, on the upper wall of the housing (41), at the end in the light emitting direction,
One third intake window (49) is opened which extends in the width direction.

A fan case (42) is connected to the housing (41) at a portion facing the air inlet (52) through a duct (47), and the inside of the fan case (42) is , A fan (44) is housed. The blower fan (44) is a duct
A discharge port (48) opening toward the inside of (47) and an intake port (43) opening downward are shown in FIG.
As shown in FIG. 5, it will be connected to a plurality of intake holes (16) formed in the bottom wall of the lower half case (11).

When the liquid crystal projector is turned on, the exhaust fan (40) and the blower fan (44) start rotating. Rotation of the exhaust fan (40) causes the housing to
(41) First intake window (45), second intake window (46) and third intake window
Air is sucked from (49) to generate an air flow around the lamp (5) toward the exhaust fan (40), and the air flow cools the outer peripheral surface of the lamp (5).

Here, the first wall is provided on the upper wall of the housing (41).
Since the left-right asymmetrical opening pattern is given by the intake window (45), the exhaust gas is emitted around the reflector (51) of the lamp (5) while rotating in one direction around the optical axis of the lamp (5). An air flow to the fan (40) will be generated.

For example, as shown in FIG. 8, when the exhaust fan (40) rotates in the clockwise direction, the ceiling wall of the housing (41b) has a first intake window (45) and a first intake window (45) at a position which is generally biased to the right. 3 By opening the intake window (49) and providing an asymmetrical opening pattern as a whole, a clockwise airflow surrounding the lamp (5) is generated, and the airflow maintains its rotation. While passing through the exhaust fan (40). As a result, uniform heat transfer is performed on the entire outer peripheral surface of the lamp (5), and the lamp (5) can be sufficiently cooled with a smaller air flow rate.

On the other hand, as shown in FIG.
When a plurality of second intake windows (46) are symmetrically opened on the ceiling wall of (41a), almost no airflow rotating around the lamp (5) is generated, and the outer peripheral surface of the lamp (5) is Airflow that is partially biased is generated. As a result, the heat transfer on the outer peripheral surface of the lamp (5) becomes insufficient, and the temperature distribution becomes uneven.

FIG. 10 (a) shows a housing (41a) in which a plurality of second intake windows (46) are opened in the central portion of the ceiling wall, and FIG. 10 (b) shows the width of the end portion of the ceiling wall. 3rd intake window (4
9) shows a housing (41b) in which a first intake window (45) extending back and forth on the side of the ceiling wall is opened, and FIG. 11 (c) shows the first intake window (45) and the second intake window (45). The housing (41c) in which all of the intake window (46) and the third intake window (49) are opened is shown in Table 1.
Shows the result of measuring the temperature distribution on the outer peripheral surface of the lamp for three types of lamp units having these housings (41a) (41b) (41c).

[0022]

[Table 1]

As is clear from the results of Table 1, the housings (41b) (41b) (41b) (41b) having a left-right asymmetric opening pattern as a whole
In c), the maximum temperature is kept lower than that of the housing (41a) having a symmetrical opening pattern, and
The difference between the maximum temperature and the minimum temperature is kept small, which confirms the effect of the housing having an asymmetric opening pattern.

Further, the lamp unit shown in FIG. 6 and FIG.
In (4), as the blower fan (44) rotates, air is sucked from the intake hole (16) of the lower half case (11) through the intake port (43) of the blower fan (44) and discharged. Exit (4
Air is discharged from 8), and the discharged air is duct (47).
Through the air inlet (52) of the lamp (5) to the reflector
It is introduced inside (51). Here, since the air inlet (52) is opened toward the light emitting part (50), the reflector (5
The air introduced inside 1) is directly blown to the light emitting unit (50). Further, the air flow is guided along the concave curved surface of the reflector (51) to generate a swirling flow surrounding the light emitting section (50).

As a result, the air introduced into the inside of the reflector (51) exchanges heat with the light emitting part (50) of the lamp (5) at a high heat transfer coefficient, and the light emitting part (50) is forcibly cooled by air. Then, the air is led out to the outside of the reflector (51) from the air outlet (54). The air led out of the air outlet (54) to the outside of the reflector (51) merges with the airflow flowing around the reflector (51) and flows toward the exhaust fan (40). The airflow that has passed through the exhaust fan (40) is discharged forward through the exhaust holes (15) of the front panel (13) shown in FIG.

As described above, since the light emitting part (50), which has the highest temperature among the lamps (5), is efficiently cooled, the exhaust fan
It is possible to set the air volume of the fan (40) or the blower fan (44) to a small amount, which can significantly reduce the noise generated from these fans (40) and (44).

Further, in the liquid crystal projector of the present invention, the emission direction of the white light from the lamp unit (4) and the projection direction of the image light from the optical unit (2) are set to 1
By adopting an optical system set in the opposite direction that is different by 80 degrees,
Projection window (14) and exhaust hole on front panel (13) of casing (1)
Since it is also provided with (15), the noise generated from the fan built in the lamp unit (4) is emitted toward the screen in the light projection direction. As a result, the noise from the fan is less likely to reach the viewer at the rear position farther from the screen than the liquid crystal projector.

[0028]Cooling unit (6) As shown in FIGS. 3 and 4, the lower position of the optical unit (2)
The cooling unit to cool the optical unit (2).
(6) is placed. The cooling unit (6) is shown in FIG. 11 and
It has a flat housing (60) as shown in Figure 12,
Four air outlets opened on the surface of the housing (60)
The four optical units (2) above (63) (64) (65) (69)
The air is blown toward the heat generating part.

The four air outlets (63) (64) (65) (69)
Of the three, the three air outlets (63), (64), and (65) shown in FIG. 16 are blue incident-side polarization plates that constitute the color synthesizing device (3).
(31), a blue liquid crystal panel (32) and a blue emission side polarizing plate (33), an air outlet for blue, an incident side polarizing plate for green (34), and a liquid crystal panel for green (35). ) And output side polarizing plate for green (36)
An air outlet for green, which is open toward, an incident side polarizing plate (37) for red, a liquid crystal panel (38) for red, and an outgoing side polarizing plate (3) for red.
It is an air outlet for red that opens toward 9).
The remaining one air outlet (69) shown in FIG. 12 serves as an air outlet for a polarization beam splitter (hereinafter referred to as PBS) that opens toward the polarization beam splitter (24) shown in FIG.

The housing (60) of the cooling unit (6) is composed of a main body (61) and a lid (62) as shown in FIG.
The above-mentioned four air outlets (63) (64) (65) (69) are opened at (62). The housing body (61) has first to third parts.
The three cooling fans (66) (67) (68) are arranged in a line, and the air discharged from these cooling fans (66) (67) (68) is formed by a plurality of partition walls. The flow is divided or merged via the flow path network (8) to form four flows having appropriate flow rates as described later, and four air outlets (63) (64) (65) (6)
Blow out from 9).

That is, of the incident side polarization plate, the liquid crystal panel, and the emission side polarization plate (hereinafter, these three sheets are collectively referred to as a polarization / liquid crystal part) for each color constituting the color synthesizing device (3), one for blue Since the amount of heat generated by the polarized light / liquid crystal part is the largest, the airflow discharged from each cooling fan (66) (67) (68) is divided into two, and one of the divided airflows is divided into the green polarization / liquid crystal part. , The polarized light / liquid crystal portion for red and the PBS are cooled, and the other divided air current is allocated to the polarized light / liquid crystal portion for blue.

Therefore, as shown in FIGS. 14 and 15, as the flow path network (8), the flow from the first cooling fan (66) to the blue air outlet (63) and the PBS air outlet (69). Road,
A flow path from the second cooling fan (67) to the blue air outlet (63) and the green air outlet (64), and the third cooling fan (68) for the blue air outlet (63) and red. It forms a flow path to the air outlet (65).

At the air outlet (69) for PBS, there is a guide vane.
(89) is attached, and the airflow from the first cooling fan (66) is blown at high speed to the high temperature portion of the polarization beam splitter (24), that is, the central portion of the light emitting surface. For cooling the blue polarization / liquid crystal part, the green polarization / liquid crystal part, and the red polarization / liquid crystal part, in order to properly adjust the air volume and the wind direction with respect to the entrance side and the exit side, as described later, Form a surface.

That is, as shown in FIG. 13, the first to fourth partition walls (81) (82) (83) (84) are installed at the blue air outlet (63) to install the first cooling fan. From the first air blowing part (91) that should blow the air flow from (66), the second air blowing part (92) that should blow the air flow from the second cooling fan (67), and the third cooling fan (68) The third air outlet (9
3) Form and. Further, air flow guide surfaces (not shown) are formed on the first partition wall (81) and the third partition wall (83), respectively.
The wind direction and volume of the airflow from the second cooling fan (67) and the third cooling fan (68) to the entrance side and the exit side of the polarization / liquid crystal portion for blue are adjusted. A guide blade (85) is installed in the air outlet (64) for green, and two air outlets (95) (96) are formed on both sides of the guide blade (85). / Adjusts the wind direction and volume of the air flow to the incident side and the emission side of the liquid crystal part. Furthermore, the red air outlet (65) has a fifth partition wall (86) and guide vanes (87).
Is installed to form two air outlets (97) and (98), and the air flow direction and volume from the third cooling fan (68) to the incident side and the emission side of the red polarization / liquid crystal portion are adjusted. .

FIG. 16 shows the positional relationship between the blue air outlet (63) and the blue polarization / liquid crystal part, the positional relationship between the green air outlet (64) and the green polarization / liquid crystal part, and the red air. Outlet (65)
Shows the positional relationship between the polarized light for red and the liquid crystal part, and the airflow whose air volume and direction are adjusted as described above is blown to the incident side and the output side of each polarized light / liquid crystal part for effective cooling. Be done.

The first cooling fan (66), the second cooling fan (67) and the third cooling fan (68) shown in FIG. 14 are all single suction type sirocco fans having a suction port on one side of the casing. . The first cooling fan (66) and the second cooling fan (67) are installed in the housing body (61) with their suction ports (66a) (67a) facing upward, and their respective discharge ports ( 66b) and 67b) face the inlet of the channel network (8). The third cooling fan (68) is installed in the housing body (61) with the suction port facing downward, and the discharge port (68b) faces the inlet of the flow path network (8). .

On the rear surface of the housing body (61), as shown in FIG. 14, the first rear surface intake air is provided corresponding to the first cooling fan (66), the second cooling fan (67) and the third cooling fan (68). Window (71),
A second rear intake window (72) and a third rear intake window (73) are opened. Also, on the bottom surface of the housing body (61), as shown in FIG. 18, corresponding to the third cooling fan (68), the lower intake window (7
4) has been opened.

FIG. 17 shows a sectional structure of the cooling unit (6) at the position where the second cooling fan (67) is installed.
The sectional structure at the position where the first cooling fan (66) is installed is similar. In addition, FIG. 18 shows the third of the cooling unit (6).
The cross-sectional structure at the position where the cooling fan (68) is installed is shown. The first cooling fan (66) and the second cooling fan (6
A space S as large as possible is provided between the upper wall of the lid body (62) and the upper wall of the lid body (62), and as shown by an arrow in FIG. 17, a rear surface of the housing body (61). Air sucked from the intake windows (71) (72) flows into the suction ports (66a) (67a) of the first and second cooling fans (66) (67) through the space. or,
Below the third cooling fan (68), a space S as large as possible is provided between the housing main body (61) and the bottom wall of the housing main body (61). As shown by the arrow in FIG. (61)
The air sucked from the rear suction window (73) and the lower suction window (74) is sucked into the suction port (68a) of the third cooling fan (68) through the space.

The three rear intake windows (71), (72) and (73) of the housing body (61) are connected to the intake holes (not shown) formed in the rear surface of the casing (1), and the housing body (61) The lower surface intake window (74) of () is connected to an intake hole (not shown) formed in the bottom wall of the casing (1).

As described above, the suction ports (66a) (67a) (68a) of the cooling fans (66) (67) (68) are all the casing (1).
Since there is no connection between the cooling fan (66), (67) and (68), the wall surface of the housing (60) is connected to the outside of the casing (1) and the inside of the casing (1). ) Only the low temperature air outside is sucked in, and the high temperature air inside the casing (1) is not sucked in. As a result, low-temperature air is blown toward the optical unit (2), and the optical unit (2) can be sufficiently cooled with a small air volume.

Further, each cooling fan (66) of the cooling unit (6)
(67) (68) uses a single suction type sirocco fan, and between the fan side where the suction ports (66a) (67a) (68a) are opened and the housing (60) wall surface, Since the space S is provided, the flow resistance of the air sucked by the fan through the space is low. As a result,
As each cooling fan, a low output sirocco fan with a low rotation speed can be adopted.

According to the above-mentioned liquid crystal projector of the present invention, the cooling system for cooling the lamp (5) and the optical unit (2) can be improved, so that effective cooling can be performed with a smaller air flow than before. It is possible to operate the fan for feeding the cooling air at a low rotation speed, which can significantly reduce the noise generated from the fan.

[Brief description of drawings]

FIG. 1 is a perspective view of a liquid crystal projector according to the present invention.

FIG. 2 is a diagram showing a configuration of an optical system of a lamp unit and an optical unit equipped in the liquid crystal projector.

FIG. 3 is an exploded perspective view of the liquid crystal projector.

FIG. 4 is a perspective view showing a state in which a lamp unit, an optical unit and a cooling unit are removed from a lower half case of the liquid crystal projector.

FIG. 5 is a perspective view showing a state where a lamp unit, an optical unit and a cooling unit are incorporated in a lower half case of the liquid crystal projector.

FIG. 6 is a plan view of a lamp unit.

FIG. 7 is a sectional view of a lamp unit.

FIG. 8 is a partially cutaway perspective view of a lamp unit having a left-right asymmetric opening pattern.

FIG. 9 is a partially cutaway perspective view of a lamp unit having a symmetrical opening pattern.

FIG. 10 is a plan view of three types of lamp units having different opening patterns.

FIG. 11 is a perspective view of a cooling unit and a color synthesizing device.

FIG. 12 is a perspective view of a cooling unit.

FIG. 13 is a plan view of a cooling unit.

FIG. 14 is an exploded perspective view of a cooling unit.

FIG. 15 is a plan view of a housing body of the cooling unit.

FIG. 16: Three polarizations / cooling unit and optical unit
FIG. 3 is a plan view showing a positional relationship with a liquid crystal section.

FIG. 17 is a cross-sectional view of a second cooling fan of the cooling unit.

FIG. 18 is a sectional view of a third cooling fan of the cooling unit.

[Explanation of symbols]

(1) Casing (11) Lower half case (12) Upper case (13) Front panel (14) Projection window (15) Exhaust hole (2) Optical unit (3) Color synthesizer (4) Lamp unit (40) Exhaust fan (41) Housing (44) Blower fan (45) First intake window (46) Second intake window (47) Duct (5) Lamp (50) Light emitting part (51) Reflector (52) Air inlet (53) Translucent plate (54) Air outlet (6) Cooling unit (60) Housing (63) Blue air outlet (64) Green air outlet (65) Red air outlet (69) Air outlet for PBS (66) First cooling fan (67) Second cooling fan (68) Third cooling fan (71) First rear intake window (72) Second rear intake window (73) Third rear intake window (74) Bottom intake window (8) Channel network

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G09F 9/00 304 G09F 9/00 304B (72) Inventor Michihiro Kurokawa 2nd Keihanhondori, Moriguchi City, Osaka Prefecture 5-5 Sanyo Electric Co., Ltd. (72) Inventor Hiromitsu Yoshimitsu 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Shoji Okazaki Keihan Hondori, Moriguchi City, Osaka Prefecture 2-5-5 Sanyo Electric Co., Ltd. (72) Inventor Taichi Yoshimura 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. F-term (reference) 2H088 EA12 EA68 HA20 MA20 2H091 FA10X FA26X FA41Z MA07 5G435 AA12 BB17 DD02 DD04 GG44 LL15

Claims (5)

[Claims] 1. A projector device that guides light from a light source to an optical system, separates the light into three primary colors, combines these three primary colors into color image light, and projects the light from a projection lens (20) forward. In the cooling unit (6) along the optical system
The cooling unit (6) is provided with one or a plurality of intake windows for taking in the outside air, one or a plurality of cooling fans for taking in and discharging the outside air from the intake window, and at a plurality of locations of the optical system. The flow path network (8) includes a plurality of air outlets that open toward a high temperature portion that is generated and a flow path network (8) for guiding the air discharged from the cooling fan to the plurality of air outlets. ) Is provided with a plurality of flow paths that distribute the air volume of the air flow to be blown from each air outlet toward the high temperature portion of the optical system according to the temperature of the high temperature portion. 2. An airflow guide wall for guiding the wind direction of the airflow to be blown toward the center position of the high temperature part of the optical system at each air outlet of the cooling unit (6). The projector device according to 1. 3. A cooling unit (6) is provided with the one or more cooling fans in a housing (60),
The partition wall for forming the flow path network (8) is installed, and the plurality of air outlets are provided on a surface of the housing (60) facing the optical system. Item 2. The projector device according to item 2. 4. The optical system comprises a polarizing beam splitter (24) to which light from a light source should enter, and a polarizing beam splitter.
A plurality of separation mirrors for separating the light passing through (24) into lights of three primary colors, and three liquid crystal panels (32) for the three primary colors through which the lights of the three primary colors separated by the separation mirrors should respectively pass. 3
5) (38), a color combining prism (30) for combining the image lights of the three primary colors from the three liquid crystal panels into a color image light, and a projection for enlarging and projecting the color image light from the color combining prism (30) The cooling unit (6) includes a lens (20), and the cooling unit (6) has, as the plurality of air outlets, one air outlet (69) that blows air toward the polarization beam splitter (24) and three liquid crystals. Three air outlets (6
3) The projector device according to any one of claims 1 to 3, wherein (64) and (65) are opened. 5. The projector device according to claim 4, wherein the flow path network (8) is adjusted so as to set a maximum amount of airflow to be blown toward the blue liquid crystal panel.