JP2003287814A - Casing for optical components, and optical unit and projector provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a casing for optical components with which cycle time in manufacturing a projector is reduced without increasing the number of components by simplifying the fixing structure of the optical components, and to provide an optical unit and the projector provided with the same. <P>SOLUTION: At a groove part 502 for sliding and storing a first lens array 412 and a second lens array 413 of a lens array holding part 500, a Z-axis positional reference surface 502A to regulate the positions of the lens arrays in the Z-axis direction, an X-axis positional reference surface 502B to regulate the positions in an X-axis direction, and a Y-axis positional reference surface to regulate the positions in a Y-axis direction are formed. The lens array holding part 500 includes energizing members 501 arranged at the right, left and upper sides of the lens arrays. The energizing members 501 press and fix the lens array holding part 500 to the X-axis positional reference surface 502B, the Y-axis positional reference surface and the Z-axis positional reference surface 502A in the state where the lens arrays are installed in the lens array holding part 500. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical component casing in which an illumination optical axis of a light beam emitted from a light source is set, and a plurality of optical components are housed and arranged at predetermined positions on the illumination optical axis. The present invention relates to a body, an optical unit including the optical component housing, and a projector.

[0002]

BACKGROUND ART It has been conventionally known to use a projector for presentations at conferences, academic conferences, exhibitions and the like. Such a projector has a plurality of optical components housed therein, and by using these optical components, a light beam emitted from a light source is modulated and then enlarged and projected to form a projected image. As such an optical component, in order to improve light utilization efficiency and eliminate various optical aberrations, a first lens array that is a light beam splitting element, and a light beam that has passed through the first lens array from a light source is used for a liquid crystal panel or the like. And a second lens array for transmitting the light to the light modulator side and superimposing it on the image forming area of the light modulator. The first lens array and the second lens array are fixed at predetermined positions near the light source.
Then, at the time of this fixing, the first lens array and the second lens array
The relative position between the lens array and the optical axis of the light incident on them is adjusted. Usually, the first lens array and the second lens array as described above are fixed to the optical component casing using an adhesive or a biasing member such as a spring.

[0003]

However, as described above, when the first lens array and the second lens array are fixed to the optical component casing by adhesion or the like, the first lens array and the second lens array are used. However, it is difficult to perform the position adjustment again when the position is displaced from the predetermined illumination optical axis. In addition, when fixing the first lens array and the second lens array by adhesion or the like, there is a problem that the drying time of the adhesive becomes long and the cycle time increases in the manufacture of the projector. Further, when the first lens array and the second lens array are fixed to the optical component casing by using a biasing member such as a spring, the first lens array and the second lens array are fixed in a direction parallel to the illumination optical axis and in two directions orthogonal to the illumination optical axis. Since it is necessary to perform positioning from a total of three directions and a spring body having a different structure is used for each of the three directions, the fixing structure of the first lens array and the second lens array becomes complicated and the number of parts increases. There is a problem that it leads to cost increase.

An object of the present invention is to provide an optical component casing which can shorten the cycle time in manufacturing a projector without simplifying the fixing structure of the optical component and increasing the number of components. To provide an optical unit and a projector.

[0005]

In the optical component housing of the present invention, an illumination optical axis of a light beam emitted from a light source is set inside, and a plurality of optical components are housed to accommodate a predetermined optical axis on the illumination optical axis. A case for an optical component arranged at a position, in order to arrange the optical component at a predetermined position on the illumination optical axis, a direction parallel to the illumination optical axis and two directions orthogonal to the illumination optical axis. An external position reference plane that restricts the position of the optical component is formed on the optical component, and the optical component is arranged in a direction parallel to the illumination optical axis and two directions orthogonal to the illumination optical axis with respect to the external position reference plane. Is provided with a plurality of biasing members for pressing and fixing, and the plurality of biasing members have the same shape.

According to the present invention as described above, the optical component housing is formed with the external position reference surface for restricting the optical component, and the optical component is pressed against and fixed to the external position reference surface. By providing the biasing member, it is not necessary to fix the optical component to the optical component casing with an adhesive or the like, and even when the optical component is displaced from the predetermined illumination optical axis, Again, it becomes easy to adjust the position of the optical component. In addition, it is not necessary to consider the drying time of the adhesive, which occurs when an adhesive or the like is used during manufacturing, and the cycle time can be reduced. In addition, since the plurality of biasing members are configured in the same shape, one type of biasing member having the same shape can be used to perform optical conversion from a direction parallel to the illumination optical axis and a direction orthogonal to the illumination optical axis. The component can be positioned with respect to the optical component casing. Therefore, it is possible to reduce the cost by simplifying the structure for fixing the optical component to the optical component casing and reducing the number of components.

In the optical component casing of the present invention, the urging member is composed of a plate-shaped member, and has a base portion located substantially in the center and arms extending in a substantially V-shaped cross section from both ends of the base portion. It is preferable to have a portion and a leg portion protruding from the tip of the arm portion in parallel with the base portion. In such a configuration,
The urging member is composed of a plate-shaped member and is provided with a base portion, an arm portion, and a leg portion, so that in the production of the urging member, the plate member is formed by punching press processing, bending processing, or the like. It can be easily manufactured, and the cost can be reduced. Further, the biasing member includes a base portion, an arm portion,
By including the leg portion and the leg portion, if the opening angle between the arm portion and the base portion or the leg portion is increased, and the plane positions of the base portion and the leg portion are brought close to each other, the plane position of the base portion and the leg portion is It may be a leaf spring structure that exerts a force in a separating direction. Therefore, even when the distance between the biased member to be biased and the member supporting the biasing member is set to be small,
The biasing member can be installed, and the biased member can be surely biased.

The optical component casing of the present invention comprises a lower casing in which the plurality of optical components are installed, and a lid-shaped upper casing that closes the lower casing. , A plurality of recesses for accommodating the biasing member are formed, and when the biasing member is accommodated in the recess, one of the base portion and the leg portion abuts an inner surface of the recess portion, and the base portion and It is preferable that the other of the legs contacts the optical component and presses the optical component in a direction parallel to the illumination optical axis and in one direction orthogonal to the illumination optical axis.

In such a structure, the optical component casing is
The lower housing includes a lower housing and an upper housing, the lower housing has a plurality of recesses, and in a state where the biasing member is housed in the recesses, one of the base portion and the arm portion abuts an end surface of the recessed portion, The other of the base portion and the arm portion is formed into a recess so that the external position reference surface is arranged at a position facing the base portion or the arm portion by contacting with the optical component. Due to the structure, the optical component can be pressed and fixed to the external position reference plane, and the optical component can be arranged on a predetermined illumination optical axis.

In the optical component casing of the present invention, the optical component is formed in a plate shape having a predetermined thickness, and the plurality of recesses are end faces of the optical component on the light beam incident side or the light beam emission side. It is preferable that it is configured to include a facing portion that is formed so as to face and a tilted portion that is tilted with respect to the outer peripheral edge of the optical component. In such a configuration, the optical component is configured in a plate shape with a predetermined thickness,
Since the plurality of concave portions are configured to include the facing portion and the inclined portion, by disposing the biasing member in the facing portion, the light flux incident direction or the light flux incident direction can be changed by the leaf spring structure of the biasing member. The position of the optical component can be regulated in the opposite direction, that is, the direction parallel to the illumination optical axis. Further, by disposing the biasing member on the inclined portion, the position of the optical component is regulated by the leaf spring structure in the biasing member in two directions, a direction orthogonal to the illumination optical axis and a direction parallel to the illumination optical axis. You can Therefore, since the plurality of concave portions are provided with the inclined portions, the facing portions are arranged at the plurality of positions when the position of the plate-shaped optical component is reliably regulated in the direction parallel to the illumination optical axis. There is no need to do so, the biasing member can be configured with the minimum number, and the cost can be reduced.

In the optical component casing of the present invention, the urging member includes an engaging portion projecting from one of the leg portions, and when the urging member is housed in the recess, the engaging portion is It is preferable that it is exposed from the recess and can be inserted and removed from the recess. In such a configuration, the biasing member includes the engaging portion, and in the state where the biasing member is housed in the concave portion, the engaging portion is exposed from the concave portion and can be inserted into and removed from the concave portion. When is deviated from the predetermined illumination optical axis, the optical component can be positioned again by gripping the engaging portion and inserting / removing it from the concave portion. Therefore, when the optical component has some trouble, the biasing member can be easily inserted into and removed from the recess, and the reworkability of the optical component can be improved.

In the optical component casing of the present invention, an engaging groove for engaging with an engaging portion of the urging member is formed on the back surface of the upper casing, and the urging member is provided in the engaging groove. When the engaging portion is engaged, one of the base portion and the leg portion comes into contact with the back surface of the upper casing, and when the upper casing is mounted on the lower casing, the other of the base portion and the leg portion is Preferably contacts the optical component and presses the optical component in the mounting direction of the upper housing.

In such a structure, an engagement groove is formed on the back surface of the upper casing, and one of the base portion and the arm portion is in a state where the engagement portion of the biasing member is engaged with the engagement groove. However, when the upper housing is attached to the lower housing by contacting the back surface of the upper housing,
If the other of the base portion and the arm portion is in contact with the optical component, a position facing the base portion or the arm portion, that is, in the mounting direction of the upper casing with respect to the lower casing, if the external position reference surface is formed. By mounting the upper housing on the lower housing, the optical component can be pressed and fixed to the external position reference plane by the leaf spring structure of the biasing member, and the optical component is arranged on the predetermined illumination optical axis. be able to.

In the optical component casing of the present invention, it is preferable that a protrusion is formed inside the engagement groove so as to project in the groove forming direction. In such a configuration, since the protrusion is formed inside the engaging groove, when the engaging portion of the urging member is inserted into the engaging groove, the engaging portion and the inner surface of the engaging groove are projected. When the upper housing is attached to the lower housing, the biasing member can be prevented from coming off from the upper housing when the upper housing is attached to the lower housing. Therefore, it is possible to simplify the work for mounting the upper housing to the lower housing and improve the work efficiency.

Further, the optical unit of the present invention has a plurality of optical components arranged on the optical path of the light beam emitted from the light source and an illumination optical axis of the light beam set therein, and accommodates the plurality of optical components. And an optical component casing disposed at a predetermined position, the optical unit comprising any one of the optical component casings of claims 1 to 7. is there. According to the present invention as described above, by including the above-described optical component casing, the object of the present invention is achieved as described above, and the above-described other operational effects are similarly obtained. Further, by using the above-described optical component casing, the optical components inside the optical unit can be easily replaced, and the reworkability can be improved.

Further, the projector of the present invention is characterized by including the optical unit described in claim 8. According to the present invention as described above, by including the above-described optical unit, the object of the present invention is achieved as described above, and the above-described other operational effects are similarly obtained.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. [1. Main Configuration of Projector] FIG. 1 is a perspective view of a projector 1 according to the present invention viewed from an upper front side. FIG. 2 is a perspective view of the projector 1 viewed from the lower back side. As shown in FIG. 1 or 2,
An outer case 2 having a substantially rectangular parallelepiped shape is provided. This outer case 2
Is a housing made of synthetic resin that houses the main body of the projector 1, and includes an upper case 21 and a lower case 22.
The cases 21 and 22 are configured to be detachable from each other.

As shown in FIGS. 1 and 2, the upper case 21 includes an upper surface portion 21A, a side surface portion 21B, a front surface portion 21C and a rear surface portion 21D which respectively constitute an upper surface, a side surface, a front surface and a rear surface of the projector 1. Composed. Similarly, as shown in FIGS. 1 and 2, the lower case 22 also includes a lower surface portion 22A, a side surface portion 22B, a front surface portion 22C, which form a lower surface, a side surface, a front surface, and a rear surface of the projector 1, respectively.
And a back surface portion 22D.

Accordingly, as shown in FIGS. 1 and 2, in the rectangular parallelepiped outer case 2, the side surfaces 21B and 22B of the upper case 21 and the lower case 22 are continuously connected to each other to form the side surface 210 of the rectangular parallelepiped. Similarly, the front portion 220 is formed by connecting the front portions 21C and 22C to each other.
However, by connecting the back surface portions 21D and 22D to each other, the back surface portion 230
However, due to the upper surface portion 21A, the upper surface portion 240 is
The lower surface portions 250 are constituted by A, respectively.

As shown in FIG. 1, an operation panel 23 is provided on the front side of the upper surface portion 240, and a speaker hole 240 for outputting sound is provided in the vicinity of the operation panel 23.
A is formed.

On the right side portion 210 when viewed from the front,
An opening 211 is formed across the two side surface portions 21B and 22B. Here, a main board 51 and an interface board 52, which will be described later, are provided in the outer case 2, and a connecting portion 51B mounted on the main board 51 is provided via an interface panel 53 attached to the opening 211. And the connecting portion 52A mounted on the interface board 52 are exposed to the outside. External electronic devices and the like are connected to the projector 1 at these connecting portions 51B and 52A.

In the front part 220, two front parts 2 are provided on the right side when viewed from the front and near the operation panel 23.
A circular opening 221 straddling 1C and 22C is formed. A projection lens 46 is arranged inside the outer case 2 so as to correspond to the opening 221. At this time, the tip portion of the projection lens 46 is exposed to the outside from the opening 221, and the focus operation of the projection lens 46 can be manually performed via the lever 46A which is a part of the exposed portion.

In the front portion 220, the opening 221
An exhaust port 222 is formed at a position on the opposite side.
A safety cover 222A is formed on the exhaust port 222.

As shown in FIG. 2, a rectangular opening 231 is formed on the right side of the back surface 230 as viewed from the back surface, and the inlet connector 24 is exposed through this opening 231.

In the lower surface portion 250, a rectangular opening 251 is formed at the center position on the right end side when viewed from below. A lamp cover 25 that covers the opening 251 is detachably provided in the opening 251. By removing the lamp cover 25, a light source lamp (not shown) can be easily replaced.

Further, in the lower surface portion 250, a rectangular surface 252 which is recessed inward by one step is formed at a corner on the left side when viewed from below and on the left side. An intake port 252A for intake of cooling air from the outside is formed on the rectangular surface 252. An intake port cover 26 that covers the rectangular surface 252 is detachably provided on the rectangular surface 252. The intake port cover 26 has an opening 26A corresponding to the intake port 252A.
Are formed. An air filter (not shown) is provided in the opening 26A to prevent dust from entering the inside.

Further, in the lower surface portion 250, a rear leg 2R which constitutes a leg portion of the projector 1 is formed at a substantially central position on the rear side. Further, front legs 2F that also constitute legs of the projector 1 are provided at the left and right front corners of the lower surface portion 250, respectively. That is, the projector 1 is supported by the rear leg 2R and the two front legs 2F at three points. Each of the two front legs 2F is configured to be able to move forward and backward in the vertical direction, and the position of the projected image can be adjusted by adjusting the inclination (posture) of the projector 1 in the front-rear direction and the left-right direction.

Further, as shown in FIGS.
A rectangular parallelepiped recess 253 is provided at a substantially central position on the front side of the outer case 2 so as to straddle 50 and the front portion 220.
Are formed. The concave portion 253 has the concave portion 253.
A cover member 27 that covers the lower side and the front side and is slidable in the front-rear direction is provided. By the cover member 27, the recess 253 houses a remote controller (remote controller) (not shown) for remotely operating the projector 1.

3 and 4 are perspective views showing the inside of the projector 1. Specifically, FIG. 3 is a diagram in which the upper case 21 of the projector 1 is removed from the state of FIG. FIG. 4 is a diagram in which the control board 5 is removed from the state of FIG.

As shown in FIGS. 3 and 4, the outer case 2 is provided with a power supply unit 3 arranged along the back surface and extending in the left-right direction, and a substantially L-shape in plan view arranged on the front side of the power supply unit 3. The optical unit 4 and the control board 5 arranged above and on the right side of these units 3 and 4, respectively.

The power supply unit 3 includes a power supply 31 and a lamp drive circuit (ballast) (not shown) arranged below the power supply 31. The power supply 31 supplies power supplied from the outside through a power cable (not shown) connected to the inlet connector to the lamp drive circuit, the control board 5, and the like. The lamp drive circuit supplies electric power supplied from a power supply 31 to a light source lamp (not shown in FIGS. 3 and 4) that constitutes the optical unit 4, and is electrically connected to the light source lamp. Such a lamp driving circuit can be configured by wiring on a substrate, for example.

The power supply 31 and the lamp drive circuit are arranged substantially in parallel vertically, and the space occupied by these extends in the left-right direction on the rear side of the projector 1.
Further, the power supply 31 and the lamp drive circuit are provided with a shield member 3 made of metal such as aluminum whose left and right sides are opened.
Surrounded by 1A. Shield member 31A
In addition to its function as a duct for guiding cooling air,
It also has a function of preventing electromagnetic noise generated in the power supply 31 and the lamp drive circuit from leaking to the outside.

As shown in FIG. 3, the control board 5 is arranged so as to cover the upper side of the units 3 and 4, and the CPU and the connecting portion 5 are arranged.
A main board 51 including 1B and the like, and an interface board 52 disposed below the main board 51 and including a connecting portion 52A are provided. In this control board 5, the connecting portion 51
The CPU or the like of the main board 51 controls a liquid crystal panel forming an optical device described later according to the image information input via B and 52A.

The main board 51 is covered with a metallic shield member 51A. Main board 51
Although it is difficult to understand in FIG. 3, it comes into contact with the upper end portion 472A (FIG. 4) of the upper light guide 472 forming the optical unit 4.

[2. Detailed Configuration of Optical Unit] Here, FIG. 5 is an exploded perspective view showing the optical unit 4.
FIG. 6 is a diagram schematically showing the optical unit 4. As shown in FIG. 6, the optical unit 4 optically processes the light flux emitted from the light source lamp 416 forming the light source device 411 to form an optical image corresponding to image information, and enlarges the optical image. Is a unit for projecting the light, an integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an optical device 44, a projection lens 46, and a composite housing these optical components 41 to 44, 46. And a resin light guide 47 (FIG. 5).

The integrator illuminating optical system 41 includes three liquid crystal panels 441 (liquid crystal panels 441R, 441G, 4 for each of red, green, and blue color lights, respectively) constituting the optical device 44.
41B) and an optical system for illuminating the image forming area substantially uniformly, and includes a light source device 411, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415. Equipped with.

The light source device 411 is provided with a light source lamp 416 as a radiation light source and a reflector 417, and the radial rays emitted from the light source lamp 416 are reflected by the reflector 41.
It is reflected at 7 to be a parallel light beam, and this parallel light beam is emitted to the outside. A high-pressure mercury lamp is used as the light source lamp 416. In addition to the high pressure mercury lamp, a metal halide lamp, a halogen lamp or the like can be adopted. Further, a parabolic mirror is adopted as the reflector 417. Instead of the parabolic mirror, a combination of a parallelizing concave lens and an ellipsoidal mirror may be adopted.

The first lens array 412 has a structure in which small lenses having a substantially rectangular contour when viewed in the optical axis direction are arranged in a matrix. Each small lens splits the light flux emitted from the light source lamp 416 into a plurality of partial light fluxes. The contour shape of each small lens is the liquid crystal panel 44.
It is set so as to be substantially similar to the shape of the first image forming area. For example, if the aspect ratio (ratio of horizontal and vertical dimensions) of the image forming area of the liquid crystal panel 441 is 4: 3, the aspect ratio of each small lens is also set to 4: 3. The second lens array 413 is the first lens array 41.
2 has a configuration substantially similar to that of 2, and has a configuration in which the small lenses are arranged in a matrix. The second lens array 413 has a function of forming an image of each small lens of the first lens array 412 on the liquid crystal panel 441 together with the superimposing lens 415. The first lens array 412 and the second lens array 413 described above are the optical components according to the present invention, and the details of the fixing structure of the first lens array 412 and the second lens array 413 to the light guide 47 will be described. It will be described later.

The polarization conversion element 414 is arranged between the second lens array 413 and the superposing lens 415. The polarization conversion element 414 as described above converts the light from the second lens array 413 into one type of polarized light, and thus the light utilization efficiency in the optical device 44 is improved.

Specifically, the polarization conversion element 414 outputs 1
Each of the partial lights converted into the polarized light of the type has a superposition lens 41.
Finally, it is almost superimposed on the liquid crystal panel 441 of the optical device 44. Since only one type of polarized light can be used in the projector 1 using the liquid crystal panel 441 that modulates polarized light, approximately half of the luminous flux from the light source lamp 416 that emits other types of randomly polarized light is not used. Therefore, by using the polarization conversion element 414, all the light fluxes emitted from the light source lamp 416 are converted into one type of polarized light, and the light utilization efficiency in the optical device 44 is improved. Such a polarization conversion element 414 is introduced, for example, in Japanese Patent Laid-Open No. 8-304739.

The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423. The dichroic mirrors 421 and 422 divide a plurality of partial light beams emitted from the integrator illumination optical system 41 into red (R). ), Green (G), and blue (B).

The relay optical system 43 includes an incident side lens 431.
, Relay lens 433, and reflection mirrors 432, 434
And has a function of guiding the red light, which is the color light separated by the color separation optical system 42, to the liquid crystal panel 441R.

At this time, in the dichroic mirror 421 of the color separation optical system 42, the red light component and the green light component of the light flux emitted from the integrator illumination optical system 41 are transmitted, and the blue light component is reflected. The blue light reflected by the dichroic mirror 421 is reflected by the reflection mirror 423, passes through the field lens 418, and reaches the blue liquid crystal panel 441B. This field lens 4
Reference numeral 18 converts each partial light flux emitted from the second lens array 413 into a light flux parallel to the central axis (chief ray) thereof. The same applies to the field lens 418 provided on the light incident side of the other liquid crystal panels 441G and 441R.

Of the red light and the green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422 and the field lens 41
8 to reach the liquid crystal panel 441G for green.
On the other hand, the red light passes through the dichroic mirror 422, passes through the relay optical system 43, and further passes through the field lens 4
The liquid crystal panel 441R for red light is reached through 18. The relay optical system 43 is used for red light because the optical path length of red light is longer than the optical path lengths of other color lights, so that the reduction of light utilization efficiency due to light divergence or the like is prevented. This is because. That is, the partial light flux that has entered the incident side lens 431 is directly transmitted to the field lens 418. Note that the relay optical system 43 is configured to pass red light of the three color lights, but is not limited to this, and may be configured to pass blue light, for example.

The optical device 44 modulates the incident light flux according to image information to form a color image,
Three incident side polarization plates 442 on which the respective color lights separated by the color separation optical system 42 are incident, and a liquid crystal panel 441R as a light modulation device arranged at the rear stage of each incidence side polarization plate 442,
441G and 441B and liquid crystal panels 441R and 441
G, 441B Ejection-side polarization plate 443 disposed after
And a cross dichroic prism 444 as a color combining optical system.

Liquid crystal panels 441R, 441G, 441B
For example, a polysilicon TFT is used as a switching element. In the optical device 44, the respective color lights separated by the color separation optical system 42 are supplied to the three liquid crystal panels 441R, 441G, 441B and the incident side polarization plate 44.
2 and the emission side polarization plate 443 are modulated according to image information to form an optical image.

The incident side polarization plate 442 is the color separation optical system 42.
Of the respective color lights separated in step 1, only polarized light in a certain direction is transmitted and other light flux is absorbed, and a polarizing film is attached to a substrate such as sapphire glass. In addition, a polarizing film is used as the field lens 418 without using the substrate.
You may attach it to. The exit-side polarization plate 443 is also configured in substantially the same manner as the incidence-side polarization plate 442, and the liquid crystal panel 441 (4
41R, 441G, 441B), only the polarized light in a predetermined direction is transmitted and the other light beams are absorbed. Further, the polarizing film may be attached to the cross dichroic prism 444 without using the substrate. These incident side polarization plate 442 and emission side polarization plate 4
43 is set so that the directions of the polarization axes thereof are orthogonal to each other.

The cross dichroic prism 444 is
The color image is formed by combining the optical images emitted from the emission side polarization plate 443 and modulated for each color light.
The cross dichroic prism 444 is provided with a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light in a substantially X shape along the interfaces of the four rectangular prisms. Three color lights are combined by the multilayer film.

The liquid crystal panel 441, the exit side polarization plate 443 and the cross dichroic prism 444 described above.
Is configured as an optical device body 45 that is integrally unitized. FIG. 7 is a perspective view showing the optical device body 45. As shown in FIG. 7, the optical device body 45 includes a cross dichroic prism 444, a fixing plate 447 made of synthetic resin fixed to the upper surface of the cross dichroic prism 444, and the cross dichroic prism 4
The exit side polarization plate 44 is attached to the light flux incident end surface of
Holding plate 446 made of metal for holding 3 and holding plate 44
6, a liquid crystal panel 441 (4
41R, 441G, 441B). Holding plate 44
6 and a liquid crystal panel 441 are provided with a gap at a predetermined interval, and cooling air is allowed to flow through this gap. The optical device body 45 is screwed and fixed to the lower light guide 471 through the round holes 447B of the four arms 447A formed on the fixing plate 447.

The projection lens 46 enlarges and projects the color image combined by the cross dichroic prism 444 of the optical device 44. The light guide 47
As shown in FIG. 5, each optical component 412 to 415, 41
8, 421 to 423, 431 to 434 and 442 are provided with a lower light guide 471 formed with a groove portion which is slidably fitted from above, and a lid-shaped upper light guide 472 that closes an upper opening of the lower light guide 471. Consists of

As shown in FIG. 5, a light source device 411 is housed at one end of the lower light guide 471 which is substantially L-shaped in plan view. A projection lens 46 is screwed and fixed to the other end side via a head portion 473 formed on the lower light guide 471.

Further, as shown in FIG. 5, the optical device body 45 housed in the lower light guide 471 is screwed and fixed to the lower light guide 471 while sandwiching the two spring members 50. The two spring members 50 urge the incident-side polarization plate 442 downward to specify the position.

[3. Cooling Structure] FIG. 8 is a view in which the upper light guide and the optical device body 45 are removed from FIG. Further, FIG. 9 is a perspective view showing the optical unit 4. Here, as shown in FIGS. 8 and 9, the projector 1 includes a panel cooling system A for mainly cooling the liquid crystal panel 441.
, A polarization conversion element cooling system B mainly cooling the polarization conversion element 414, and a power supply cooling system C mainly cooling the power supply unit 3.
And a light source cooling system D that mainly cools the light source device 411.

As shown in FIG. 8, in the panel cooling system A,
A large sirocco fan 61 arranged below the power supply unit 3 is used. In the panel cooling system A, as shown in FIG. 8 or 9, by the sirocco fan 61,
Intake port 25 formed in the lower surface portion 250 of the outer case 2
External cooling air sucked from 2A (FIG. 2) is guided below the optical device body 45 by a duct (not shown), and each liquid crystal panel 441 in the lower light guide 471.
It enters into the inside of the light guide 47 from the inlet formed in the lower side. As shown in FIG. 9, the cooling air passes through the gaps between the liquid crystal panels 441R, 441G, 441B and the cross dichroic prism 444 to cool the liquid crystal panel 441 and the exit side polarization plate, and the upper light guide. Four
It is discharged into the space between 72 and the control board. Also,
This cooling air is supplied to each liquid crystal panel 441R, 441G, 4
The liquid crystal panel 441 and the incident-side polarization plate are cooled through the gap between 41B and the field lens 418, and are discharged between the upper light guide 472 and the incident-side polarization plate. At this time, the air discharged into this space does not flow to the projection lens 46 side due to the contact between the upper end portion 472A of the upper light guide 472 and the control board 5.

In the polarization conversion element cooling system B, the cooling air sucked by the sirocco fan 61 is guided to the lower side of the polarization conversion element 414 by a duct (not shown) arranged below the lower light guide 471. After entering the light guide 47 from the inlet formed on the lower side of the polarization conversion element 414 in the lower light guide 471 and cooling the polarization conversion element 414, it is discharged from the outlet formed on the upper light guide 472 or 474. It

In the power supply cooling system C, as shown in FIG. 8, a small sirocco fan 62 is used which is arranged above the sirocco fan 61 with a metal plate material interposed therebetween. In the power supply cooling system C, the cooling air flowing between the upper light guide 472 and the control board 5 by the panel cooling system A is
While cooling the control board 5, the sirocco fan 62 sucks it in and discharges it to the inside of the power supply unit 3. The air discharged inside flows along the shield member 31A to cool the power supply 31 and the lamp drive circuit, and is discharged from the opening on the side opposite to the sirocco fan 62.

In the light source cooling system D, the axial fan 63 arranged on the front side of the light source device 411, and the axial fan 63.
And a duct 64 attached to the. In the light source cooling system D, the air exhausted from the power source cooling system C and the polarization conversion element cooling system B is sucked by the axial fan 63, and the air is discharged from the slit-shaped opening formed in the side surface portion of the light source device 411. Light source lamp 4
16 is cooled and is discharged to the outside from the exhaust port 222 of the outer case 2 via the duct 64.

[4. Lens Array Fixing Structure] FIG.
Is the first lens array 412 and the second lens array 4
13 is an exploded perspective view showing a structure for fixing 13 to the light guide 47. FIG. In the light guide 47, a lens array holding unit 500 that stores and holds the first lens array 412 and the second lens array 413 is configured by installing the upper light guide 472 so as to close the lower light guide 471. The array holding unit includes a first lens array 412 and a second lens array 41 on a predetermined illumination optical axis.
A biasing member 501 for positioning 3 is installed.
In the lens array holding unit 500, the lower light guide 4
A groove 502 for accommodating the first lens array 412 and the second lens array 413 by sliding is formed in 71.

The groove 502 supports the first lens array 412 and the second lens array 413, and at the same time
The lens array 412 and the second lens array 413 are arranged on a predetermined illumination optical axis, and are arranged in the Z-axis direction (see FIG.
0)) to regulate the positions of the first lens array 412 and the second lens array 413.
And the first lens array 412 in the X-axis direction (see FIG. 10).
And the X-axis position reference plane 502B that regulates the positions of the second lens array 413 and the positions of the first lens array 412 and the second lens array 413 in the Y-axis direction (see FIG. 10), although not shown here. It is provided with a Y-axis position reference plane 502C for restricting. By bringing the first lens array 412 and the second lens array 413 into contact with the X-axis position reference plane 502B, the Y-axis position reference plane 502C, and the Z-axis position reference plane 502A as described above, The outer shape position of the second lens array 413 is set, and the second lens array 413 is arranged on a predetermined illumination optical axis.

A concave portion 503 for accommodating the biasing member 501 is formed adjacent to the groove portion 502, and the concave portion 503 is located on the side surface on the projection direction side in the lens array holding portion 500. Then, the first concave portion 503A as a facing portion formed in the Z-axis direction and the first concave portion 503A are disposed so as to face each other, and the first concave portion 503A and the first concave portion 503A are arranged to face the X-axis and the Z-axis at approximately 45 °.
The second concave portion 503B is provided as an inclined portion formed in the ° direction.

FIG. 11 is an exploded perspective view showing the back surface of the upper light guide 472 and showing the installed state of the biasing member 501. In the lens array holding portion 500, the upper light guide 472 has an engagement groove 504 that engages with the end portion of the biasing member 501 and a contact surface 505 that contacts the biasing member 501. Inside the engaging groove 504, the engaging groove 504
The protrusion 504A is formed so as to project in the forming direction, and when the end portion of the biasing member 501 is inserted into the engagement groove 504, the protrusion 504A and the inner surface of the engagement groove 504 are urged. The structure is such that the end portion of the member 501 is crimped. Further, the upper light guide 472 is provided on the outer peripheral edge of the contact surface 505.
A biasing member regulation portion 505A that projects from the back surface of the biasing member 501 and regulates the position of the biasing member 501 is formed. The biasing member regulating portion 505A fixes the biasing member 501 at a stable position, and the biasing member 501 causes the first lens array 41 to move.
The second lens array 413 and the second lens array 413 are securely fixed.

FIG. 12 is a schematic perspective view showing the structure of the biasing member 501. The biasing member 501 is composed of a plate-shaped member, and has a base portion 501A at a substantially central portion and the base portion 501A.
Of the arm portion 501B extending from both ends of the arm portion 501B in a substantially C-shape, a leg portion 501C protruding from a tip of the arm portion 501B so as to be parallel to the base portion 501A, and a leg portion 501C positioned at an upper portion in FIG. And an engaging portion 501D extending in the direction. With such a configuration of the biasing member 501, the arm 501B and the base 501A or the leg 50 are provided.
The opening angle with 1C becomes large, and the base portion 501A and the leg portion 50
1C has a leaf spring structure that exerts a force in a direction in which the base portion 501A and the leg portion 501C are separated from each other in a plane in a state where they are close to each other in a plane. The biasing member 501 connects the first lens array 412 and the second lens array 413 to X,
In order to urge the Y and Z axes, the first lens array 41
2 and 3 at each end of the second lens array 413,
It is located at a total of 6 locations.

FIG. 13 is an exploded perspective view for explaining the positional relationship of the biasing member 501 with respect to the first lens array 412 and the second lens array 413. The biasing member 501 is
A Z-axis urging member 501Z, which is located on the right side of the first lens array 412 and the second lens array 413 when viewed from the light beam incident direction, and which regulates the positions of the first lens array 412 and the second lens array 413 in the Z-axis direction. And an X-axis biasing member 501X which is located on the left side of the first lens array 412 and the second lens array 413 and regulates the positions of the first lens array 412 and the second lens array 413 in the X-axis direction.
And the first lens array 412 and the second lens array 4
13, which is located above the first lens array 41 in the Y-axis direction.
2 and a Y-axis urging member 501Y that regulates the positions of the second lens array 413.

The leg portions 501C of these biasing members 501 are
First lens array 412 and second lens array 413
It is in contact with the four corners of. In this way, the biasing member 50
When the first leg 501C abuts the four corners, the force from the urging member 501 to the first lens array 412 and the second lens array 413 is made uniform, and the first lens array 412 and the second lens are stably provided. The array 413 can be pressed.

Here, although not specifically shown, in the Z-axis urging member 501Z, the base portion 501A has the above-mentioned first portion.
It contacts the inner surface of the recess 503A (FIG. 10). Also, X
In the shaft biasing member 501X, the base portion 501A is in contact with the inner side surface of the second recess 503B (FIG. 10). Further, in the Y-axis biasing member 501Y, the base 501A is
It contacts the contact surface 505 (FIG. 11) of the upper light guide 472.

FIG. 14 is an exploded perspective view in which the first lens array 412 and the second lens array 413 are installed in the lens array holding portion 500 and the upper light guide 472 is removed. After the first lens array 412 and the second lens array 413 are slidably installed in the groove portion 502 of the lower light guide 471, the Z-axis biasing member 501Z and the X-axis biasing member 501X are respectively placed in the first concave portion 503A and the second concave portion 503A.
It is stored in the recess 503B. Here, in a state where the first lens array 412 and the second lens array 413 are installed in the groove portion 502, the first concave portion 503A and the second concave portion 5 are formed.
The distance between the inner surface of 03B and the ends of the first lens array 412 and the second lens array 413 is set to be shorter than the planar distance between the base 501A and the leg 501C of the biasing member 501, and Z Shaft urging member 501Z
And the X-axis biasing member 501X are respectively the first recesses 503.
In the state of being housed in A and the second recess 503B, the opening angle between the arm 501B and the base 501A or the leg 501C becomes large, the base 501A and the leg 501C are close to each other in a plane, and the base 501A and the leg 501C. The first lens array 412 and the second lens array 413 are pressed in the Z-axis direction and the X-axis direction by exerting a force in a direction in which they are separated from the 501C in a plane, and the Z-axis position reference plane 502A and the X-axis position reference surface are obtained. It will abut surface 502B. In this state, the Z-axis biasing member 501Z and the X-axis biasing member 501X are also provided.
The engaging portion 501D is exposed from the upper end surface of the lower light guide 471 and can be inserted into and removed from the lower light guide 471.

Y is inserted in the engaging groove 504 of the upper light guide 472.
When the engaging portion 501D of the shaft biasing member 501Y is press-fitted and the upper light guide 472 is attached to the lower light guide 471 on which the first lens array 412 and the second lens array 413 are installed, the Y axis is attached. The leg portion 501C of the biasing member 501Y contacts the upper end surfaces of the first lens array 412 and the second lens array 413. Here, when the upper light guide 472 is attached to the lower light guide 471, the contact surface 50 of the upper light guide 472 is
5 and the upper end surfaces of the first lens array 412 and the second lens array 413 installed on the lower light guide 471 are as follows.
01C is set shorter than the planar distance, and in a state where the upper light guide 472 is attached to the lower light guide 471, the planar position between the base 501A and the leg 501C of the Y-axis biasing member 501Y is the upper position. The first contact surface 505 of the light guide 472 and the first light guide 471 installed on the lower light guide 471.
The upper end surfaces of the lens array 412 and the second lens array 413 are in close proximity to each other. That is,
The base 501A and the leg 501C of the Y-axis biasing member 501Y exert a force in a direction in which they are separated from each other, and the first lens array 412.
The second lens array 413 is pressed in the Y-axis direction and comes into contact with the Y-axis position reference surface 502C.

As described above, the X-axis biasing member 501
X, Y-axis biasing member 501Y, and Z-axis biasing member 501
The first lens array 412 and the second lens array 413 are pressed by the Z in the X-axis direction, the Y-axis direction, and the Z-axis direction, and the X-axis position reference plane 502B and the Y-axis position reference plane 5 are pressed.
02C and the Z-axis position reference plane 502A, and is arranged at a predetermined position on the illumination optical axis.

The first lens array 412 and the second lens array 412
When the lens array 413 is deviated from a predetermined position on the illumination optical axis, or when any trouble occurs, by removing the upper light guide 472 from the lower light guide 471, the first lens array 412 and the second lens array 412 can be removed. The regulation of the lens array 413 in the Y-axis direction is released, and the Z-axis biasing member 50 is released.
By gripping the engaging portion 501D of the 1Z and X-axis biasing member 501X and pulling it upward, the first lens array 41
2 and the Z-axis direction of the second lens array 413, and X
Axial regulation is released. Then, the first lens array 412 and the second lens array 413 are removed,
Repositioning or replacement of the lens array 412 and the second lens array 413 is performed.

[5. Effects of Embodiment] According to the present embodiment as described above, there are the following effects. (1) The light guide 47 includes the first lens array 412.
And an X-axis position reference plane 502B, a Y-axis position reference plane 502C, and Z that regulate the position of the second lens array 413.
An axial position reference plane 502A is formed, and the first lens array 412 and the second lens array 4 are formed with respect to these reference planes.
Since the X-axis biasing member 501X, Y-axis biasing member 501Y, and Z-axis biasing member 501Z that press and fix 13 are provided, the first lens array 412 and the second lens array 413 are provided with respect to the light guide 47. Therefore, it is not necessary to fix the first lens array 412 and the second lens array 413 with an adhesive or the like, and it is easy to perform the position adjustment again even when the first lens array 412 and the second lens array 413 are deviated from the predetermined illumination optical axis. . In addition, it is not necessary to consider the drying time of the adhesive, which occurs when an adhesive or the like is used during manufacturing, and the cycle time can be reduced.

(2) The X-axis biasing member 501X, the Y-axis biasing member 501Y, and the Z-axis biasing member 501Z have the same shape, so that the biasing member 501 has the same shape.
Thus, the first lens array 412 and the second lens array 413 can be positioned with respect to the light guide 47 from the three directions of the X-axis direction, the Y-axis direction, and the Z-axis direction. Therefore, in each of the biasing members in the three directions, it is not necessary to manufacture a biasing member having a shape corresponding to each biasing member, and the biasing member can be configured with one kind of biasing member having a simple shape. In the manufacturing of, the cost can be reduced.

(3) Since the biasing member 501 has the leaf spring structure, it can be easily manufactured from a plate material by forming such as punching press work, bending work, etc. In, the cost can be reduced. (4) The urging member 501 has a base portion 5 located at a substantially central portion.
01A, an arm portion 501B extending substantially in a V shape from both ends of the base portion 501A, and a leg portion 501C protruding from a tip end portion of the arm portion 501B so as to be parallel to the base portion 501A. The biasing member 5 is provided in a gap that is set shorter than the planar distance between the 501A and the leg portion 501C.
When 01 is inserted, the planar distance between the base portion 501A and the leg portion 501C is shortened, that is, a force can be exerted in the direction in which the base portion 501A and the leg portion 501C are separated from each other.

(5) The lower light guide 471 has a groove 5
02, a concave portion 503 is formed, the first lens array 412 and the second lens array 413 are slidably installed in the groove portion 502, and the Z-axis biasing member 501Z and the X-axis biasing member 501X are respectively placed in the first concave portion. When inserted into the 503A and the second recess 503B, the base 501A of the biasing member 501 abuts on the inner side surface of the recess 503, and the leg 5
01C contacts the end portions of the first lens array 412 and the second lens array 413 to regulate the position in the Z-axis direction by the Z-axis biasing member 501Z, and the X-axis biasing member 501X in the X-axis direction. The position can be regulated. Therefore, by these biasing members 501, the first
Z the lens array 412 and the second lens array 413.
The axial position reference plane 502A and the X-axis position reference plane 502B can be pressed, and the positions of the first lens array 412 and the second lens array 413 in the Z-axis direction and the X-axis direction can be set.

(6) First recess 503A and second recess 5
03B includes a Z-axis biasing member 501Z and an X-axis biasing member 50.
In the state where 1X is housed, the engaging portions 501D of these biasing members 501 are exposed from the recess 503, so that the first lens array 412 and the second lens array 4 are
Even when 13 is displaced from the predetermined illumination optical axis, the first lens array 412 and the second lens array 413 are positioned again by gripping the engaging portion 501D and inserting / removing it from the concave portion 503. It can be carried out. Therefore, the first lens array 412 and the second lens array 4
If there is something wrong with 13, the biasing member 501 can be easily inserted and removed from the recess 503, and the reworkability of the first lens array 412 and the second lens array 413 can be improved.

(7) On the back surface of the upper light guide 472,
The engaging groove 504 is provided, and the Y-axis biasing member 5 is provided in the engaging groove 504.
The lower light guide 47 is engaged by engaging the engaging portion 501D of 01Y.
1, when the upper light guide 472 is mounted, the base 501A of the Y-axis urging member 501Y abuts the abutting surface 505 of the upper light guide 472, and the leg 501C has the first lens array 412 and the second lens array 412. By contacting the upper end surface of the lens array 413, the upper light guide 472
Is mounted on the lower light guide 471, the first lens array 412 and the second lens array 413 are pressed in the Y-axis direction, and the end surfaces of the first lens array 412 and the second lens array 413 are moved to the Y-axis position reference plane 502C. Can be brought into contact with. Therefore, by simply attaching the upper light guide 472 to the lower light guide 471,
Y of the lens array 412 and the second lens array 413
The position in the axial direction can be regulated.

(8) Since the protrusion 504A is formed inside the engagement groove 504 formed on the back surface of the upper light guide 472 so as to project in the groove forming direction, the Y-axis urging member 501Y is formed. When the engaging portion 501D is inserted into the engaging groove 504, the engaging portion 501D is crimped by the inner side surface of the engaging groove 504 and the protrusion 504A, and the upper light guide 472 is attached to the lower light guide 471. It is possible to prevent the Y-axis urging member 501Y from coming off from the engagement groove 504 at the time of mounting. Therefore, it is possible to easily regulate the first lens array 412 and the second lens array 413 in the Y-axis direction.

(9) The upper light guide 47 is provided on the outer peripheral edge of the contact surface 505 formed on the back surface of the upper light guide 472.
By forming the biasing member restricting portion 505A so as to project from the back surface of the second member 2, the position of the Y-axis biasing member 501Y is restricted, and the biasing states of the first lens array 412 and the second lens array 413 are stabilized. Can be held.

(10) The second recess 503B is formed in a direction of about 45 ° with respect to the X-axis and the Z-axis, so that the X-axis biasing member 501X is housed in the second recess 503B. Then, the X-axis biasing member 501X biases the first lens array 412 and the second lens array 413 in the direction of approximately 45 ° with respect to the X-axis and the Z-axis,
The positions of the first lens array 412 and the second lens array 413 can be regulated not only in the X-axis direction but also in the Z-axis direction. That is, the biasing states of the first lens array 412 and the second lens array 413 in the Z-axis direction are made uniform, and the first lens array 412 and the second lens array 413 are surely brought into contact with the Z-axis position reference surface 502A. You can

(11) The light guide 47 has the second recess 5
03B, the first lens array 41
When the positions of the second lens array 413 and the second lens array 413 are restricted in the Z-axis direction, in order to reliably restrict the positions in the Z-axis direction,
It is not necessary to provide the first recessed portion 503A formed in the Z-axis direction on both the side surface side in the projection direction and the side surface opposite thereto, that is, the biasing member 5 housed in the recessed portion 503.
01 can be configured by the minimum number, and the cost can be reduced.

(12) Leg portion 501C of each biasing member 501
The first lens array 412 and the second lens array 4
By contacting the four corners of 13, each biasing member 50
1 is made uniform, and the first lens array 412 and the second lens array 413 are moved to the X-axis position reference plane 502.
B, Y-axis position reference plane 502C, and Z-axis position reference plane 5
It can be surely brought into contact with 02A.

[6. Modification of Embodiments]
The present invention is not limited to the embodiment described above, and includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention. For example, in the above embodiment, in the biasing member 501, the base 501A has the first recess 503.
A and the inner surface of the second recess 503B or the contact surface 505 of the upper light guide 472, and the leg portion 501C is the first
Although it was in contact with the end surfaces of the lens array 412 and the second lens array 413, the present invention is not limited to this, and the leg portion 501C contacts the inner surface of the first recess 503A, the second recess 503B or the contact surface of the upper light guide 472. Alternatively, the base portion 501A may be in contact with the end surfaces of the first lens array 412 and the second lens array 413. However, the above embodiment is advantageous in that the four corner portions of the first lens array 412 and the second lens array 413 can be pressed, and the pressing force of the biasing member 501 can be made uniform.

In the above embodiment, the concave portion 503 is
The first recess 503A formed in the Z-axis direction and the second recess 5 formed in the direction of approximately 45 ° with respect to the X-axis and the Z-axis.
However, the present invention is not limited to this, and in the lower light guide 471, a concave portion is formed along the Z-axis direction on the side surface in the projection direction and the side surface opposite thereto, and further, the side surface in the projection direction or You may form a recessed part along the X-axis direction in the side surface which opposes this. However, it is possible to reduce the number of recesses formed by providing the second recess 503B formed in the direction of about 45 ° with respect to the X axis and the Z axis as in the above embodiment, and further Also, there is an advantage that the number of biasing members housed in the recess can be reduced, and the cost can be reduced. Furthermore, a concave portion is formed on the bottom surface of the lower light guide 471 along the Y-axis direction, and the biasing member is housed in the concave portion.
The positions of the second lens array 413 and the second lens array 413 in the Y-axis direction may be restricted. In this case, the Y-axis position reference plane 502C
Will be formed on the back surface of the upper light guide 472.

In the above embodiment, the first recess is located on the projection lens side of the lower light guide 471, and the second recess is formed so as to face it. However, the present invention is not limited to this. Alternatively, the lower light guide 471 may be formed on a side surface of the lower light guide 471 in the projection direction, and the first recess may be formed to face the side surface.

Further, in the above embodiment, the X-axis position reference plane and the Z-axis position reference plane are formed in the lens holding portion so as to extend outward, but the invention is not limited to this, and the X-axis position reference plane may be provided in the direction converging inward. It may be formed. In this case, the positions of the first concave portion and the second concave portion need to be formed so as to extend outward in the lens holding portion.

Further, in the above embodiment, when the first lens array 412 and the second lens array 413 are arranged on the predetermined illumination optical axis, the first lens array 412 and the second lens array 413 are arranged in the left-right direction, and 3 up
The position was regulated by the biasing member 501 from the direction,
Not limited to this, the first lens array 412 and the second lens array 413 in the vertical direction, and the left or right three
The position may be regulated by the biasing member 501 from the direction.
That is, the first lens array 412 and the second lens array 413 may be configured so that their positions are restricted from the three directions of the X axis, the Y axis, and the Z axis.

Further, in the above-mentioned embodiment, only the example of the projector using the three light modulating devices is given, but the present invention uses the projector using only one light modulating device and the two light modulating devices. The present invention can be applied to a projector or a projector using four or more light modulation devices.

Further, although the liquid crystal panel is used as the light modulation device in the above embodiment, a light modulation device other than the liquid crystal, such as a device using a micromirror, may be used.
Further, in the above-described embodiment, the transmissive light modulator having the different light incident surface and the light exit surface is used. However, the reflective light modulator having the same light incident surface and the light exit surface is used. Good.

Furthermore, in each of the above-mentioned embodiments, only an example of a front type projector which projects from the direction of observing the screen is given, but the present invention projects from the side opposite to the direction of observing the screen. It is also applicable to rear type projectors.

[0089]

According to the optical component casing, the optical unit and the projector having the optical component casing of the present invention, the fixing structure of the optical component is simplified, the reworkability is improved, and the cost is reduced. The effect is that it can be achieved.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a projector according to the present embodiment as viewed from the upper front side.

FIG. 2 is an overall perspective view of the projector according to the present embodiment as seen from the lower back side.

FIG. 3 is a perspective view showing the inside of the projector in the embodiment. Specifically, it is a diagram in which the upper case of the projector is removed from the state of FIG. 1.

FIG. 4 is a perspective view showing the inside of the projector in the embodiment. Specifically, the control board is removed from the state of FIG.

FIG. 5 is an exploded perspective view showing an optical unit in the embodiment.

FIG. 6 is a diagram schematically showing the optical unit in the embodiment.

FIG. 7 is a perspective view of the optical device body according to the above embodiment as viewed from below.

FIG. 8 is a diagram illustrating the flow of cooling air in the panel cooling system A and the power supply cooling system C in the embodiment.

FIG. 9 is a diagram illustrating the flow of cooling air in the panel cooling system A and the polarization conversion element cooling system B in the embodiment.

FIG. 10 is an exploded perspective view showing a fixing structure of the first lens array and the second lens array in the embodiment.

FIG. 11 is an exploded perspective view showing the back surface of the upper light guide in the embodiment and explaining the installation state of the biasing member.

FIG. 12 is a schematic perspective view showing a structure of a biasing member in the embodiment.

FIG. 13 is an exploded perspective view illustrating the positional relationship of the biasing member with respect to the first lens array and the second lens array in the embodiment.

FIG. 14 is a view showing the first lower light guide in the embodiment.
It is the figure which installed the lens array and the 2nd lens array.

[Explanation of symbols]

1 projector 4 Optical unit 46 Projection lens (projection optical system) 47 Light Guide 411 light source device 412 first lens array 413 Second lens array 471 Lower light guide 472 Upper Light Guide 501 biasing member 501A base 501B arm 501C legs 501D engagement part 502A Z-axis position reference plane (outside position reference plane) 502B X-axis position reference plane (outside position reference plane) 502C Y-axis position reference plane (outside position reference plane) 503 recess 503A First concave portion (opposing portion) 503B Second recess (slope) 504 engagement groove 504A protrusion

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[Procedure amendment]

[Submission date] June 27, 2002 (2002.6.2)
7)

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

Claims (9)

[Claims] 1. An optical component casing in which an illumination optical axis of a light beam emitted from a light source is set, and a plurality of optical components are housed and arranged at a predetermined position on the illumination optical axis. In order to arrange the optical component at a predetermined position on the illumination optical axis, an external position reference plane that regulates the position of the optical component in a direction parallel to the illumination optical axis and two directions orthogonal to the illumination optical axis is provided. A plurality of biasing members that press and fix the optical component in a direction parallel to the illumination optical axis and two directions orthogonal to the illumination optical axis with respect to the outer shape position reference plane; The urging member of (1) has the same shape as the optical component housing. 2. The optical component casing according to claim 1, wherein the urging member is formed of a plate-shaped member, and has a base portion located substantially in the center and a substantially H-shaped cross section from both ends of the base portion. An optical component housing, comprising: an arm portion extending to the base, and a leg portion protruding from the tip of the arm portion in parallel with the base portion. 3. The optical component casing according to claim 2, further comprising a lower casing in which the plurality of optical components are installed, and a lid-shaped upper casing that closes the lower casing. A plurality of recesses for accommodating the biasing member are formed in the lower housing, and when the biasing member is accommodated in the recess, one of the base portion and the leg portion contacts an inner surface of the recess. The other of the base portion and the leg portion is in contact with the optical component and presses the optical component in a direction parallel to the illumination optical axis and in one direction orthogonal to the illumination optical axis. A housing for optical components. 4. The optical component casing according to claim 3, wherein the optical component has a plate thickness and has a predetermined thickness, and the plurality of recesses are provided on a light beam incident side of the optical component. For an optical component, comprising: a facing portion formed to face the end face on the light beam emission side, and an inclined portion formed to be inclined with respect to the outer peripheral edge of the optical component. Case. 5. The optical component casing according to claim 3 or 4, wherein the biasing member includes an engaging portion protruding from one of the leg portions, and the biasing member is provided in the recess. When stored, the engaging part
A housing for optical parts, which is exposed from the recess and can be inserted and removed from the recess. 6. The optical component casing according to claim 5, wherein an engaging groove that engages with an engaging portion of the urging member is formed on a back surface of the upper casing. When the engaging portion of the urging member is engaged with, one of the base portion and the leg portion abuts the back surface of the upper housing, and when the upper housing is attached to the lower housing, the base portion and The other of the legs is in contact with the optical component, and presses the optical component in the mounting direction of the upper casing, the optical component casing. 7. The optical component casing according to claim 6, wherein a protrusion is formed inside the engagement groove so as to project in the groove forming direction. body. 8. A plurality of optical components arranged on an optical path of a light beam emitted from a light source and an illumination optical axis of the light beam are set inside, and the plurality of optical components are housed and arranged at a predetermined position. An optical unit including an optical component casing, comprising the optical component casing according to any one of claims 1 to 7. 9. A projector comprising the optical unit according to claim 8.