JP3490985B2 - Projector device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to light from a light source.
Generates image light by guiding to the academic system and expands to the screen in front
The present invention relates to a projector device that performs projection. [0002] 2. Description of the Related Art A projector of this type is provided with a case.
Inside the housing, a lamp as a light source and a polarizing beam splitter
, Polarizer, liquid crystal panel, projection lens, etc.
Optical system that is
Heat is generated from polarizing beam splitters and liquid crystal panels
To install a cooling fan inside the casing,
By flowing the air inside the casing, the optical
Cooling of the entire system has been performed. [0003] However, high brightness is required.
To a projector device that can project
In this case, the amount of heat generated from the optical system increases,
It is necessary to increase the cooling air volume by rotating the fan at high speed.
And as a result, the noise generated from the cooling fan increases.
Problem. Therefore, an object of the present invention is to reduce the number of optical systems.
A projector device that can sufficiently cool
To reduce noise from cooling fans
It is. [0004] A projector according to the present invention.
-The device takes in air from outside the casing.
One or more air intake windows to blow air into the optics
With one or more air outlets for
The space inside the casing is separated from the air through the intake window.
An air passage extending to the outlet is formed. Soshi
A cooling fan is installed in the air flow path,
Only air taken in through the intake window from outside
By spraying the optical system from the outlet, the optical system
Is cooled. In the projector device of the present invention,
When the intake window opens to the outside of the casing,
In addition, an air passage extending from the intake window to the air outlet
Interior space (optical system installation space)
Because of the operation of the cooling fan,
As the low-temperature air outside the sink is taken in,
The low temperature air mixed with the high temperature air inside the casing
Without blowing, it is blown from the air outlet to the optical system
Will be. As a result, the optical system is sufficiently cooled. In a specific configuration, the inside of the casing is
Is provided with a cooling unit along the optical system,
In the knit housing, the intake window and air outlet are
While being opened, the partition wall forming the air flow path is
The cooling fan is installed and the suction port is connected to the intake window.
And the outlet is connected to the air outlet.
Attached inside the housing, the intake window of the housing
Is connected to an air inlet formed in the casing. In the specific configuration, the operation of the cooling fan is
The air outside the casing is sucked by the
Through the pores and the intake window of the housing of the cooling unit,
It is sucked into the suction port of the cooling fan. And cooling
The air discharged from the outlet of the fan is
Blowing from housing air outlet toward optical system
Can be [0008] According to the projector device of the present invention,
If cold air outside the casing is
Blows into optics without mixing with hot air
Therefore, it is possible to obtain a sufficient cooling effect with less airflow than before.
This reduces noise from the cooling fan.
Is possible. [0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to a liquid crystal projector.
The embodiment that was implemented in
You.overall structure The liquid crystal projector according to the present invention is configured as shown in FIG.
Flat case consisting of half case (11) and upper case (12)
The casing (1) and the front panel (13) of the casing (1).
The lamp window (14) is opened and the lamp unit
There is an exhaust vent (15) for warm air discharged from the knit.
You. The inside of the casing (1) is as shown in FIGS.
Optical unit for generating color image light (2)
And a lamp unit (4) serving as a light source of the optical unit (2)
And a cooling unit for cooling the optical unit (2)
(6) is deployed. [0010]Optical unit (2) The optical unit (2) is a lamp unit as shown in FIG.
The white light from (4) is passed to the first integrator (21)
(22), the second integrator (23) and the polarization beam splitter.
After passing through the liter (24), it is led to the two-color separation mirror for blue (25),
This separates the blue light. Also, two-color separation mirror for blue
-Light passing through (25) is guided to the green two-color separation mirror (27),
This separates the green light. Two-color separation mirror for blue (2
The blue light separated by 5) passes through the second mirror (26)
The light enters the color synthesizing device (3). Also, a two-color separation mirror for green (2
The green light separated by 7) is incident on the color synthesizer (3)
The red light enters the color synthesizing device (3) via the third mirror (28).
Shoot. The blue light incident on the color synthesizing device (3)
Incident side polarizing plate (31) of the forming device (3) and the liquid crystal panel (3) for blue
2), and through the blue output side polarizing plate (33), a color combining prism
(30). Green light incident on the color synthesis device (3)
Is the polarizing plate (34) on the green incidence side of the color synthesizer (3), and the liquid crystal for green
Color synthesis via panel (35) and green exit polarizer (36)
It is led to the prism (30). Furthermore, it is incident on the color synthesis device (3).
The red light thus emitted is incident on the red incident side polarizing plate (3) of the color synthesizing device (3).
7), the liquid crystal panel for red (38), and the exit-side polarizing plate for red (39).
After that, the light is guided to the color combining prism (30). Color synthesis prism
The three colors of image light guided to (30) are applied to the color combining prism (30).
Color image light obtained by the
It is enlarged and projected on the screen in front through the projection lens (20).
You. [0012]Lamp unit (4) The lamp unit (4) has a housing (4) as shown in FIG.
1) An ultra-high pressure mercury lamp (5) is installed in
An exhaust fan (40) is installed at the rear of (5).
You. The ultra-high pressure mercury lamp (5) is connected to the reflector (51)
A light emitting unit (50) provided at the focal position of the reflector (51),
A light transmitting plate (53) covering the opening of the reflector (51) is provided.
The reflector at the lower end of the translucent plate (53)
Between the opening edge of the light-transmitting plate (53) and
A wide and narrow air inlet (52) is opened,
At the upper end of the plate (53), the opening edge of the reflector (51)
And a narrow sky extending in the width direction of the light transmitting plate (53).
An air outlet (54) is opened. In addition, 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 it. On the upper wall of the housing (41), as shown in FIG.
One in the width direction orthogonal to the lamp's optical axis (front-back direction).
One elongated first intake window (45) extending in the front-rear direction at the end
At the center in the width direction,
A plurality of elongated second intake windows (46) are provided.
Also, on the upper wall of the housing (41), at the end in the light emitting direction,
One third intake window (49) that extends in the width direction is opened.
You. The housing (41) has an air inlet (52).
A fan case (42) is connected to the facing part via a duct (47)
Inside the fan case (42).
(44) is housed. The blower fan (44) is
Discharge port (48) opening toward the inside of (47) and downward
And an intake port (43) that is open at
As shown in the figure, a plurality of suction
It will be connected to the pore (16). Power is supplied to the liquid crystal projector
And the exhaust fan (40) and the blower fan (44) start rotating.
You. When the exhaust fan (40) rotates, the housing
(41) first intake window (45), second intake window (46) and third intake window
Air is sucked in from (49) and exhaust around lamp (5)
An airflow flowing toward the fan (40) is generated, and
Thus, the outer peripheral surface of the lamp (5) is cooled. Here, the first wall of the housing (41) is
An asymmetric opening pattern is provided by the intake window (45)
Around the reflector (51) of the lamp (5)
Rotates in one direction about the optical axis of the lamp (5).
Airflow toward the exhaust fan (40)
You. For example, as shown in FIG. 8, the exhaust fan (40)
When rotating clockwise, the ceiling wall of the housing (41b)
Is the first intake window (45) and
The third intake window (49) was opened, and the opening was asymmetrical as a whole.
By enclosing the lamp (5) by giving a mouth pattern
A clockwise rotating airflow is generated.
It must pass through the exhaust fan (40) while maintaining rotation.
You. As a result, the uniform outer circumferential surface of the lamp (5) is uniform.
Heat transfer will take place and run with less airflow.
The pump (5) can be cooled sufficiently. On the other hand, as shown in FIG.
A plurality of second intake windows (46) open symmetrically on the ceiling wall of (41a).
If installed, the airflow rotating around the ramp (5)
Almost no air flow, and airflow that is concentrated on a part of the outer peripheral surface of the lamp (5)
Occurs. As a result, the heat on the outer peripheral surface of the lamp (5)
Insufficient transmission and bias in temperature distribution
Become. FIG. 10 (a) shows a case where a plurality of
2 shows the housing (41a) with the intake window (46) opened,
FIG. 4B shows a third intake window (4) extending in the width direction at the end of the ceiling wall.
9) and the first intake window (45) that extends back and forth on the side of the ceiling wall
FIG. 3 (c) shows the installed housing (41b), and FIG.
Of the first intake window (45), the second intake window (46) and the third intake window (49).
All show the opened housing (41c), Table 1
Are three types with these housings (41a) (41b) (41c)
Temperature distribution on the outer surface of the lamp
Represents the result of the measurement. [0020] [Table 1] As is clear from the results in Table 1, as a whole
Housing (41b) (41
In c), a housing having a symmetrical opening pattern
(41a), the maximum temperature can be kept lower,
The difference between the maximum and minimum temperatures is kept small,
The effect of housing with asymmetric opening pattern is supported
Be killed. The lamp unit shown in FIGS. 6 and 7
In (4), when the blower fan (44) rotates,
Of the blower fan (44) through the intake hole (16) of the lower case (11).
Air is sucked in through the intake port (43), and air is
Air is discharged from 8), and the discharged air is discharged from the duct (47).
Through the air inlet (52) of the lamp (5)
It is introduced inside (51). Here, the air inlet (52)
Since it is set up for Mitsube (50), the reflector (5
The air introduced inside (1) is directed directly to the light emitting part (50).
Sprayed on. Also, follow the concave curved surface of the reflector (51).
Surrounding the light-emitting part (50)
A swirling flow occurs. As a result, it is introduced into the inside of the reflector (51).
The air that has been emitted has a high heat transfer coefficient with the light emitting part (50) of the lamp (5).
After performing heat exchange in
From the air outlet (54) to the outside of the reflector (51).
You. Outlet from the air outlet (54) to the outside of the reflector (51)
The air flowed around the reflector (51)
They merge and flow toward the exhaust fan (40). Exhaust fan
The airflow that has passed through the panel (40) is reflected by the front panel (13) shown in FIG.
It is discharged forward through the exhaust hole (15). As described above, the highest temperature among the lamps (5)
Because the light emitting part (50) is efficiently cooled, the exhaust fan
(40) and blower fan (44)
No, so that these fans (40) (44)
The generated noise can be significantly reduced. In the liquid crystal projector of the present invention,
Indicates the emission direction of white light from the lamp unit (4),
And the projection direction of the image light from the
By adopting the optical system set in the opposite direction which is different by 80 degrees,
Projection window (14) and exhaust hole on front panel (13) of casing (1)
(15) and built-in lamp unit (4)
The noise generated by the fan
Thus, the light is emitted in the light projection direction. By this
And after leaving the screen more than the LCD projector
Noise from fans is difficult to reach
You. [0026]Cooling unit (6) As shown in FIGS. 3 and 4, the lower position of the optical unit (2)
In order to cool the optical unit (2),
(6) is arranged. The cooling unit (6) is shown in FIG.
It has a flat housing (60) as shown in FIG.
Four air outlets opened on the surface of the housing (60)
(63) (64) (65) (69) Four optical units (2) above
It blows air toward the heat generating part. The four air outlets (63) (64) (65) (69)
Of the three air outlets (63), (64) and (65) shown in FIG.
Each of the blue incident-side polarizers constituting the color synthesis device (3)
(31), blue liquid crystal panel (32) and blue emission side polarizing plate (33)
Air outlet for blue opening toward
Plate (34), liquid crystal panel for green (35) and emission side polarizing plate for green (36)
Green air outlet opening toward
A light plate (37), a liquid crystal panel for red (38), and an emission side polarizing plate for red (3
It is an air outlet for red that opens to 9).
Further, the remaining one air outlet (69) shown in FIG.
Open to polarization beam splitter (24) shown in 2
Air for polarizing beam splitter (PBS)
It becomes an outlet. The housing (60) of the cooling unit (6) is shown in FIG.
As shown in FIG. 14, the main body (61) and the lid (62)
At (62), the above four air outlets (63) (64) (65) (69)
Has been established. The housing body (61) has first to third
Three cooling fans (66) (67) (68)
And the air discharged from these cooling fans (66) (67) (68)
The air flows through the channel network (8) formed by the plurality of partition walls.
And then merged into an appropriate flow rate as described below.
It becomes four flows and four air outlets (63) (64) (65) (6
It is blown out from 9). That is, for each color constituting the color synthesizing device (3),
Incident-side polarizing plate, liquid crystal panel, and emitting-side polarizing plate
Of these three sheets as one set, called polarization / liquid crystal part), for blue
Since the amount of heat generated by the polarization / liquid crystal section is the largest, each cooling fan
(66) (67) (68)
The polarized air flow is divided into green polarized light / liquid crystal part and red polarized light, respectively.
Allocated to cooling of light / liquid crystal unit and PBS
All the airflow to the blue polarization / liquid crystal section.
You. Therefore, as shown in FIG. 14 and FIG.
Blue air is blown from the first cooling fan (66) as a road network (8).
A flow path leading to an outlet (63) and an air outlet for PBS (69);
From the second cooling fan (67) to the blue air outlet (63) and green
The flow path to the air outlet (64) and the third cooling fan (68)
To the blue air outlet (63) and the red air outlet (65).
And a flow path. A guide blade is provided at the air outlet (69) for PBS.
(89) to deflect the airflow from the first cooling fan (66).
In the high temperature part of the light beam splitter (24),
Spray at high speed to the center. Polarized light for blue / liquid crystal part, green
Cooling of polarized light / liquid crystal part and red polarized light / liquid crystal part
Properly adjust the air volume and direction for the entrance and exit sides.
For this purpose, an airflow guide surface is formed as described later. That is, as shown in FIG.
The mouth (63) is provided with first to fourth partition walls (81) (82) (83) (84).
Air flow from the first cooling fan (66)
The air from the first air outlet (91) and the second cooling fan (67)
A second air blowing section (92) for blowing a flow, and a third cooling fan.
The third air blowing section (9) to blow out the airflow from the fan (68)
3) is formed. Also, the first partition (81) and the third partition
An airflow guide surface (not shown) is formed on each of the walls (83),
From the second cooling fan (67) and the third cooling fan (68),
Adjust the airflow direction and volume of the air flow to the entrance and exit sides of the light / liquid crystal section.
Adjust. Guide vanes (85) are installed at the green air outlet (64).
To form two air outlets (95) (96) on both sides
And from the second cooling fan (67) to the green polarization / incident side of the liquid crystal unit.
And the direction and volume of airflow to the emission side. Further red sky
The air outlet (65) has a fifth partition (86) and guide vanes (87)
To form two air outlets (97) (98),
3 From the cooling fan (68), the polarization side for red / the entrance side and exit of the liquid crystal part
Adjust the direction and volume of airflow to the side. FIG. 16 shows a blue air outlet (63) and a blue air outlet.
Light / liquid crystal position, green air outlet (64) and green
Light / liquid crystal unit positional relationship and red air outlet (65)
And the positional relationship between the polarized light for red and the liquid crystal part,
The air flow whose air volume and direction are adjusted as described above
To the entrance and exit sides of the
Done. The first cooling fan (66) shown in FIG.
Cooling fan (67) and third cooling fan (68)
One-sided suction type with suction port on one side of
I'm a co-fan. A first cooling fan (66) and a second cooling fan
(67) have their suction ports (66a) (67a) facing upward.
Installed in the housing body (61)
Each discharge port (66b) (67b) faces the inlet of the flow path network (8).
I have. In addition, the third cooling fan (68)
It is installed on the housing body (61) with
The outlet (68b) faces the inlet of the channel network (8). On the back of the housing body (61), FIG.
As shown, a first cooling fan (66), a second cooling fan (67) and
Corresponding to the third cooling fan (68), the first rear intake window (71),
Second rear intake window (72) and third rear intake window (73) opened
ing. In addition, on the bottom of the housing body (61), FIG.
As shown, corresponding to the third cooling fan (68), the lower intake window (7
4) has been established. FIG. 17 shows the second cooling fan of the cooling unit (6).
Represents the sectional structure at the position where the fan (67) is installed,
Sectional structure at the position where the first cooling fan (66) is installed
The same is true for FIG. 18 shows the third cooling unit (6).
Shows the cross-sectional structure at the position where the cooling fan (68) is installed.
I do. The first cooling fan (66) and the second cooling fan (6
Above 7), as large as possible between the upper wall of the lid (62)
A space S is provided and is indicated by an arrow in FIG.
In the same way, suction from the rear intake window (71) (72) of the housing body (61)
Entrained air flows through the space to the first and second cooling fans.
The air flows into the suction ports (66a) (67a) of the fans (66) (67). or,
Below the third cooling fan (68), the housing body (61)
A space S as large as possible is provided between the bottom wall
And the housing body (61) as shown by the arrow in FIG.
From the rear intake window (73) and the lower intake window (74)
Air is sucked into the third cooling fan (68) through the space
It is sucked into the mouth (68a). The three rear intakes of the housing body (61)
Windows (71), (72) and (73) were opened on the back of casing (1).
Connected to the air intake (not shown), the lower surface of the housing body (61)
The intake window (74) is provided on the bottom wall of the casing (1).
Connects to a hole (not shown). As described above, each cooling fan (66) (67) (68)
The suction ports (66a) (67a) (68a) are all casing (1)
And the inside of the casing (1)
(60) is a partition and there is no connection.
Cooling fans (66), (67) and (68) have only casing (1)
Only low-temperature air is sucked into the casing (1).
Hot air is not sucked in. As a result, the optical
Low-temperature air is blown out to the unit (2)
And sufficiently cool the optical unit (2) with a small airflow
I can do it. Each cooling fan (66) of the cooling unit (6)
(67) (68) adopt a single-suction sirocco fan
And the fan side where the inlets (66a) (67a) (68a) are opened
Space between the housing and the wall of the housing (60).
Is provided to the fan through the space.
The flow resistance of the incoming air is low. As a result,
Low-power sirocco with low rotation speed as each cooling fan
It becomes possible to adopt a fan. According to the liquid crystal projector of the present invention described above,
For example, cooling for cooling the lamp (5) and the optical unit (2)
Effective with less air volume than before by improving the cooling system
Cooling air can be supplied.
It is possible to operate the fan at a low rotation speed.
This significantly reduces the noise generated by the fan.
Can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a liquid crystal projector according to the present invention. FIG. 2 is a diagram illustrating a configuration of an optical system of a lamp unit and an optical unit provided 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 in the liquid crystal projector. FIG. 5 is a perspective view showing a state in which a lamp unit, an optical unit, and a cooling unit are incorporated in a lower half case in the liquid crystal projector. FIG. 6 is a plan view of the 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 the cooling unit. FIG. 14 is an exploded perspective view of the cooling unit. FIG. 15 is a plan view of a housing main body of the cooling unit. FIG. 16 shows three polarizations of the cooling unit and the optical unit.
FIG. 4 is a plan view illustrating a positional relationship with a liquid crystal unit. FIG. 17 is a 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. [Description of Signs] (1) Casing (11) Lower half case (12) Upper half case (13) Front panel (14) Projection window (15) Exhaust hole (2) Optical unit (3) Color combining device (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 the front page (72) Inventor Fumihiko Hamada 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Ryuji Adachi 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Taichi Yoshimura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-2001-133885 (JP, A) JP-A-2001 -132694 (JP, A) JP-A-2001-13589 (JP, A) JP-A-10-186517 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 21/00 G02F 1 / 13 505 G03B 21/14 G03B 21/16

Claims (1)

(57) [Claim 1] An optical unit that generates image light by receiving light from a light source, a light source of the optical unit, and a cooling unit that cools the light source are provided in a casing. A projector unit provided with a lamp unit and a cooling unit housed in the housing and provided independently of the cooling unit of the lamp unit for cooling the optical unit, and projecting video light forward from the optical unit. In the housing of the cooling unit, one or more intake windows connected to an intake hole formed in the casing to take in air from the outside, and one or more air blowouts for blowing air toward the optical unit. Ports are provided, and are separated from the internal space of the casing, from the intake window to the air outlet. Is formed, and a plurality of cooling fans are installed in the air flow path, and only air taken in from the outside of the casing through the air inlet and the air inlet window is transmitted from the air outlet to the optical outlet. The projector device, wherein the optical unit is cooled by being sprayed on the unit.