JP2007249147A - Adjustment auxiliary device for projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adjustment auxiliary device for inspecting a projector, which can be rapidly arranged in compliance with a market requirement, the extension cost of which is low and the space for arrangement of which is made small. <P>SOLUTION: The adjustment auxiliary device 8 for the projector 100 has a darkroom 10, and a pedestal for inspection 30 having a placing surface on which the projector 100 is placed. The darkroom 10 has a screen arranging part 16 where a screen 50 is arranged, an opening for operation 11 opposed to the screen arranging part 16, a side wall part, a bottom part and a ceiling part. The lowermost part of the light receiving surface of the screen 50 is located at a position nearly in contact with the bottom part 14, and the light receiving surface is inclined at a first tilt angle larger than 90° to the bottom part 14. The placing surface is inclined at a second tilt angle to be 90° to the light receiving surface, and the height of the screen arranging part 16 is regulated according to height set when the screen 50 is arranged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an adjustment assisting device used in adjusting a projector.

Conventionally, the position of components inside a projector is adjusted by observing a projection image projected from a projector onto a screen.
Such adjustment includes, for example, optical axis adjustment and contrast adjustment. In order to ensure the accuracy of these adjustments, these adjustments are performed in a dark room that can block disturbance caused by external light. The adjustment assisting device is composed of this dark room and an inspection stand (also called a work desk) on which the projector is placed.
Since these adjustment assisting devices are necessary for each process of performing various types of inspections, a large number of such adjustment assisting devices are required depending on the type of inspection. For this reason, there is a problem that a large space is required for the auxiliary adjustment device in the projector manufacturing factory.
On the other hand, a small inspection auxiliary device including a converging lens, a transmission screen, and a CCD camera has been proposed (for example, Patent Document 1).

JP 2004-4562 A

By the way, in order to meet the current and rapidly changing market demand, it is necessary to quickly add a production line. At this time, it may be necessary to add an adjustment auxiliary device for inspecting the projector.
However, in the above-described technology, for example, it is necessary to procure members such as a converging lens, a transmissive screen, and a CCD camera, and it may not be possible to quickly add an adjustment auxiliary device. In addition, the procurement cost of members such as a converging lens for adding a large number of adjustment assist devices may be excessive.

Therefore, the present invention is an adjustment assisting device for projector inspection, and can be quickly deployed according to market demands, has a low expansion cost, and can be adjusted to reduce the space for deployment. An object is to provide an auxiliary device.

According to the first aspect of the present invention, there is provided a projector adjustment assisting device, comprising: a dark room; and an inspection gantry having a placement surface for placing the projector, wherein the dark room has a screen. A screen arrangement portion to be arranged; a work opening facing the screen arrangement portion;
A side wall portion, a bottom portion, and a ceiling portion, and a lowermost portion of the light receiving surface of the screen is located at a position substantially in contact with the bottom portion, and the light receiving surface is larger than 90 degrees with respect to the bottom portion. The mounting surface is tilted at a second tilting angle so that the mounting surface is 90 degrees with respect to the light receiving surface, and the height of the screen placement portion is the placement of the screen. This is achieved by an adjustment assisting device characterized in that it is defined by the height at the time.

According to the configuration of the first invention, the lowermost part of the light receiving surface of the screen is located at a position substantially in contact with the bottom.
And since the said light-receiving surface inclines with the 1st inclination angle larger than 90 degree | times with respect to the said bottom part, the height from the said bottom part to the said screen was arrange | positioned in the state with the said light-receiving surface perpendicular | vertical It means lower than the case.
Further, the mounting surface is inclined at a second inclination angle so as to be 90 degrees with respect to the light receiving surface. For this reason, since the light receiving surface can receive the projection light from the projector in the same state as when the projector and the screen are in a horizontal state, the projected image is not distorted.
As described above, the lowermost part of the light receiving surface of the screen is located at a position substantially in contact with the bottom, and the light receiving surface is inclined at a first inclination angle greater than 90 degrees with respect to the bottom. The height from the bottom to the top of the screen is kept low.
And since the height of the said screen arrangement | positioning part is prescribed | regulated by the height when the said screen is arrange | positioned, it is low corresponding to the height of the said screen.
The adjustment assisting device can be configured only by defining its size and shape, and since it is not necessary to procure a converging lens, a transmission screen, a CCD camera, or the like, it can be quickly deployed according to market requirements. This is possible and the expansion cost is low.
As described above, the inspection device can be quickly deployed according to market demand, the cost of expansion is low, and the space for deployment can be reduced.

According to a second invention, in the configuration of the first invention, the first tilt angle is defined based on a focal length of the projector and a distance from a lowermost part of the light receiving surface to a projection lens of the projector. This is an adjustment assisting device.

  According to the configuration of the second invention, the projection image by the projector is not distorted.

According to a third aspect of the invention, in the configuration of the first aspect of the invention, the height from the bottom to the projection lens is defined by the height of the person in charge of adjustment.

According to the configuration of the third aspect of the invention, the work efficiency of the adjustment person who adjusts the peripheral components of the projection lens is improved.

According to a fourth invention, in the configuration of the first invention, the height from the bottom to the work opening is defined by the height of the person in charge of adjustment.

According to the configuration of the fourth invention, the work efficiency of the person in charge of adjustment who observes the projected image of the screen in the darkroom from the work opening is improved.

According to a fifth invention, in the configuration of the first invention, the height from the bottom to the working opening is a height at which an adjustment person can secure an observation opening for observing the light receiving surface. It is an adjustment auxiliary device characterized by being defined as.

  According to the structure of 5th invention, the height of the said working opening can be restrained low.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

(First embodiment)
FIG. 1 is a schematic side view showing an inspection apparatus 8 according to the first embodiment of the present invention. The inspection device 8 is an adjustment auxiliary device for inspecting a projection image of a projector 100 (see FIG. 6 ) described later and adjusting internal components. That is, the inspection device 8 is an example of an adjustment auxiliary device.
FIG. 2 is a schematic plan view showing the inspection apparatus 8.
FIG. 3 is a schematic perspective view showing the dark room 10. The dark room 10 is an example of a dark room.
FIG. 4 is a schematic diagram showing the work desk 30 and the like.
FIG. 5 is a schematic view showing the light shielding plate 32 and the like.
In the inspection device 8, the projection image projected from the projector 100 onto the screen 50 (see FIG. 1 and the like) is observed to inspect whether or not the optical axis is aligned. The position of the components inside the projector 100 is adjusted according to the inspection result. In the inspection device 8,
If the contrast of the projected image is observed and the contrast is outside the allowable range, the projector 1
00 Adjust the position of parts inside.

(Configuration of projector 100)
FIG. 6 is a schematic perspective view showing an example of an overview of the projector 100 to be inspected in the inspection apparatus 8.
FIG. 7 is a schematic view showing main components of the optical unit 4 constituting the projector 100. As shown in FIG.
First, the configuration of the projector 100 will be briefly described.

As shown in FIG. 6, the projector 100 includes a housing 100a, a projection lens 100b, and the like.
As shown in FIG. 7, the optical unit 4 of the projector 100 includes an optical device (optical device) in which an integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, a light modulation optical system, and a color synthesis optical system are integrated. ) 44 and the projection lens 100b.

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

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

The relay optical system 43 includes an incident side lens 431, a relay lens 433, and a reflection mirror 43.
2 and 434, and the red light, which is the color light separated by the color separation optical system 42, is supplied to the liquid crystal panel 44.
It has a function of leading to 1R.

The optical device 44 has a function of modulating an incident light beam according to image information to form a color image. The optical device 44 includes three incident-side polarizing plates 442 to 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 disposed at the subsequent stage of each incident-side polarizing plate 442. 441G, 441B and the respective liquid crystal panels 441R, 441G, 441B
It has an exit-side polarizing plate 443 disposed in the latter stage and a cross dichroic prism 444 (hereinafter referred to as “prism 444”) as a color synthesis optical system.

Each of the liquid crystal panels 441R, 441G, and 441B uses, for example, a polysilicon TFT as a switching element.
The incident-side polarizing plate 442 transmits only the change light in a certain direction among the color lights separated by the color separation optical system 42 and absorbs other light beams. The incident side polarizing plate 442 is obtained by attaching a polarizing film to a substrate such as sapphire glass.
The exit-side polarizing plate 443 is also configured in substantially the same manner as the incident-side polarizing plate 442, and the liquid crystal panel 441 (
441R, 441G, 441B) transmits only polarized light in a predetermined direction and absorbs other light beams.
The incident side polarizing plate 442 and the exit side polarizing plate 443 are set so that the directions of the polarization axes thereof are orthogonal to each other.

The prism 444 combines the optical images emitted from the emission-side polarizing plate 443 and modulated for each color light to form a color image.
The 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 four right-angle prisms. These dielectric multilayer films The three colored lights are synthesized.

The projection lens 100 b enlarges the color image synthesized by the prism 444 of the optical device 44 and projects it on the external screen 50.
As shown in FIG. 2, the light beam projected from the projection lens 100 b gradually spreads and reaches the screen 50.
In the inspection apparatus 8, the optical axis inspection and the contrast inspection are performed in a state where the casing 100 a of the projector 100 is removed (semi-finished product state).
When the optical axis of the superimposing lens 415 and the relay lens 433 and the optical axis of the light beam reflected by the reflection mirrors 432 and 434 match a predetermined illumination optical axis (hereinafter, “the optical axis matches In this case, an image of only white color is formed on the screen 50. However, when the optical axes do not match, a colored region is formed on the screen 50 instead of a white image. Specifically, if the blue optical axis is deviated, a yellow image appears on the screen 50. If the green optical axis is shifted, a magenta image appears on the screen 50. If the red optical axis is shifted, a cyan image appears on the screen 50. Screen 5
Observing the color of the image of 0 and adjusting the position and installation angle of the superimposing lens 415 and the like are called optical axis adjustment.
Depending on the positions and installation angles of the incident-side polarizing plate 442 and the emission-side polarizing plate 443, the light flux may not be blocked. Therefore, in contrast adjustment, the incident side polarizing plate 44 is set so that the value becomes the smallest while observing the value of an illuminometer (not shown) arranged at the center of the screen 50.
2 and the position and angle of the exit side polarizing plate 443 are adjusted.

(Structure of inspection device 8)
As shown in FIG. 1, the inspection device 8 includes a dark room 10 and a work desk 30. The work desk 30 is an example of an inspection rack. As shown in FIGS. 1 and 4, the work desk 30 includes an intermediate member 30A, a lower member 30B, and an upper member 30C. The projector 100 is placed on the placement surface 30Ca of the upper member 30C. The placement surface 30Ca (see FIG. 4) is an example of a placement surface. The placement surface 30Ca is inclined 20 degrees with respect to a surface parallel to the bottom 14 of the dark room 10.

As shown in FIGS. 1 to 3, the darkroom 10 has a screen arrangement wall 16 on which a screen 50 is arranged. The screen arrangement wall 16 is an example of a screen arrangement unit.
As shown in FIG. 1A, the screen 50 is supported by a support base 50b, and the lowermost portion of the light receiving surface 50a is located at a position substantially in contact with the bottom portion 14. The light receiving surface 50 a has an inclination of 110 degrees with respect to the surface H parallel to the bottom portion 14.

FIG. 1B is a diagram for explaining a method of defining the inclination of the light receiving surface 50a.
As shown in FIG. 1B, the inclination θ2 of the light receiving surface 50a with respect to the surface H parallel to the bottom portion 14 is
It is defined by an inclination θ1 with respect to a straight surface H indicating the focal length L1 of the projector 100. That is, an angle obtained by adding 90 degrees to the inclination θ1 is θ2.
This inclination θ1 is defined by the focal length L1 and the height d2a. As shown in FIG. 1B, when the height d2a and the focal length L1 are determined, the angle θ1 is determined. The height d2a is a distance from the lowermost part of the light receiving surface 50a to the projection lens 100b.
Therefore, it means that the angle θ2 is also defined by the height d2a and the focal length L1.

The focal length L1 is determined by the model of the projector 100.
The height d2 from the bottom 14 to the projection lens 100b is defined by the height of the person in charge of adjustment who uses the inspection device 8. For example, if the height of the person in charge of adjustment is 170 cm, the height d2 at which the person in charge of adjustment can easily work with his / her hand is 93 cm.
The height d2 is a height obtained by adding the above-described height d2a to the height d2b from the bottom 14 to the lowermost part of the light receiving surface 50a.

The dark room 10 has a work opening 11. The work opening 11 is disposed to face the screen arrangement wall 16. The work opening 11 is an example of a work opening.
The height d4 of the work opening 11 from the bottom 14 is defined by the height of the person in charge of adjustment. If the height of the adjustment person is 170 cm, the height d4 is defined as a necessary and sufficient height for the adjustment person to easily observe the inside of the dark room 10 and the screen 50 while standing upright. For example, 160 cm.

A light-shielding curtain 12 (see FIG. 3) is disposed in the work opening 11 and is opened and closed according to the inspection purpose. Specifically, the light shielding curtain 12 is opened at the time of adjusting the optical axis. At the time of contrast adjustment, the light shielding curtain 12 is closed.
The light shielding curtain 12 has an incident opening 12a. The incident opening 12a is configured to allow the projection light S (see FIG. 1) from the projection lens 100b of the projector 100 to pass through.

As described above, the inclination angle θ3 (see FIG. 4) of the mounting surface 30Ca of the work desk 30 is 20 degrees, but this angle θ3 is 90 degrees with respect to the light receiving surface 50a. It is stipulated in. The inclination angle θ3 of the mounting surface 30Ca is an example of a second inclination angle.

The distance d1 (see FIG. 1) between the work opening 11 and the screen arrangement wall 16 is the projector 1
00 is defined as a distance necessary for projecting the projection light S onto the screen 50 to form an image.
The height d3 of the screen arrangement wall 16 is defined by the height when the screen 50 is arranged.

The dark room 10 includes side walls 18A and 18B, a bottom portion 14 and a ceiling 20. Side wall 18
A and 18B are examples of the side wall portions. The bottom part 14 is an example of a bottom part. The ceiling 20 is an example of a ceiling part.

The work desk 30 is provided with a light shielding plate 32 (see FIGS. 4 and 5).
As shown in FIG. 5, the light shielding plate 32 has an incident hole 32a.
The light shielding plate 32 has a property of preventing reflection of light.
The position of the incident hole 32a corresponds to the projection lens 100b when the projector 100 is placed on the work desk 30. Specifically, the tip portion of the projection lens 100 b is in contact with the light shielding plate 32. Then, the projection light S passes through the incident hole 32a and enters the dark room 10.
As shown in FIG. 5, the shape of the light shielding plate 32 is larger than the entrance opening 12 a of the light shielding curtain 12. In the state where the projector 100 is disposed on the work desk 30, the light shielding plate 3.
2 and the light shielding curtain 13 are in contact with each other. Therefore, the shape of the incident aperture 12a is changed to the projection lens 1.
Even when it is formed larger than the shape of 00b, the light shielding plate 32 can prevent external light from entering the dark room 10.

As shown in FIG. 1, the light receiving surface 50 a of the screen 50 is located at a position substantially in contact with the bottom portion 14.

The inspection device 8 is configured as described above.
In the inspection performed by observing the projection image projected from the projector 100 onto the screen 50, it is sufficient that the dark room 10 can pass the projection light. Projector 100 is used for presentations in conference rooms and the like. For example, when the projector 100 is placed on a desk in a conference room and a projection image is formed on the screen, if an image is formed at a position lower than the desk, a conference participant can see the projection image. Have difficulty. Therefore, most of the screen that forms the projection image is located above the projection lens 100 b of the projector 100.
On the other hand, in the manufacturing process of the projector 100, since the presentation is not performed in a conference room or the like, the screen 50 does not need to be positioned above the projection lens 100b of the projector 100.
In this regard, in the inspection device 8, the lowermost portion of the light receiving surface 50 a of the screen 50 is located at a position that is substantially in contact with the bottom portion 14. For this reason, the screen 50 is positioned at a position lower than the projection lens 100b.
Since the screen 50 is arranged with an inclination angle θ2 larger than 90 degrees with respect to the plane H parallel to the bottom portion 14, the height of the screen 50 is set when the screen 50 is arranged vertically. Lower than.
As described above, the lowermost portion of the light receiving surface 50a of the screen 50 is located at a position substantially in contact with the bottom portion 14, and the light receiving surface 50a is inclined with respect to the bottom portion 14 at an inclination angle θ2 larger than 90 degrees. Thus, the height from the bottom 14 to the top of the screen 50 is kept low.
Since the height d3 of the screen arrangement wall 16 is defined by the height when the screen 50 is arranged, the height of the dark room 10 on the screen arrangement wall 16 side can be minimized.
Further, the light receiving surface 50a is inclined at an angle θ2 larger than 90 degrees with respect to the surface H parallel to the bottom portion 14. The placement surface 30Ca is inclined at an inclination angle θ3 so as to be 90 degrees with respect to the light receiving surface 50a. For this reason, since the light receiving surface 50a can receive the projection light from the projector 100 in the same state as when the projector 100 and the screen 50 are in the horizontal state, the projected image is not distorted. For this reason, the inspection device 8 can achieve inspection purposes such as optical axis adjustment.
The inspection device 8 can be configured simply by defining its size and shape, and it is not necessary to procure members such as a converging lens, a transmission screen, and a CCD camera, so that it can be quickly deployed according to market requirements. And the expansion cost is low.
In this way, the inspection device 8 can be quickly deployed according to market demands, the expansion cost is low, and the space for deployment can be reduced.

In addition, since the inclination angle θ2 of the light receiving surface 50a is defined based on the focal length L1 of the projector 100 and the distance d2 from the bottom portion 14 to the projection lens 100b, the projected image by the projector 100 is surely not distorted. Can be.

Further, since the height d2 of the projection lens 100b is defined by the height of the person in charge of adjustment,
The work efficiency of the person in charge of adjusting the parts around the projection lens 100b is improved.

Furthermore, since the height of the work opening 11 is defined by the height of the person in charge of adjustment, the work efficiency of the person in charge of adjustment who observes the projected image of the screen 50 in the dark room 10 from the work opening 11 is improved.

(Second Embodiment)
Next, an inspection apparatus 8A according to the second embodiment will be described. Since the configuration of the second inspection apparatus 8A is similar to the configuration of the inspection apparatus 8 of the first embodiment, common parts are the same as those in the first embodiment, and the description thereof is omitted. explain.

FIG. 8 is a schematic view showing the inspection apparatus 8A.
As shown in FIG. 8, the height d4 of the working opening 11 is equal to the height d2 of the projection lens 100b.
It is defined as the height at which the observation opening 11a can be secured.
For this reason, the height d5 of the working opening 11 of the dark room 10 can be minimized.

The present invention is not limited to the embodiments described above. Furthermore, the above-described embodiments may be combined with each other.

1 is a schematic side view showing an inspection apparatus according to an embodiment of the present invention. The schematic plan view of an inspection apparatus. The schematic perspective view which shows a dark room. Schematic which shows a work desk etc. FIG. Schematic which shows a light-shielding plate. The schematic perspective view which shows an example of the external appearance of a projector. Schematic which shows the main components of the optical unit which comprises a projector. The schematic side view which shows an inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 8,8A ... Inspection apparatus, 10 ... Dark room, 11 ... Work opening, 14 ... Bottom part, 16 ... Screen arrangement wall, 18A, 18B ... Side wall, 20 ... Ceiling, 30 ... Work desk, 30Ca ... Mounting surface, 50 ...
Screen, 50a ... light receiving surface, 100 ... projector, 100b ... projection lens.

Claims (5)

A projector adjustment assisting device,
A testing room having a darkroom and a mounting surface for mounting the projector;
The darkroom is
A screen placement section on which the screen is placed;
A work opening facing the screen placement portion;
A side wall,
The bottom,
The ceiling,
Have
The lowermost part of the light receiving surface of the screen is located at a position substantially in contact with the bottom,
The light receiving surface is inclined at a first inclination angle greater than 90 degrees with respect to the bottom;
The mounting surface is inclined at a second inclination angle so as to be 90 degrees with respect to the light receiving surface,
The height of the said screen arrangement | positioning part is prescribed | regulated by the height when the said screen is arrange | positioned, The adjustment assistance apparatus characterized by the above-mentioned. 2. The adjustment assisting device according to claim 1, wherein the first inclination angle is defined based on a focal length of the projector and a distance from a lowermost portion of the light receiving surface to a projection lens of the projector. . The adjustment assisting device according to claim 1, wherein a height from the bottom to the projection lens is defined by a height of a person in charge of adjustment. The adjustment assisting device according to claim 1, wherein a height from the bottom portion to the working opening is defined by a height of a person in charge of adjustment. The height from the bottom to the working opening is defined as a height at which an adjustment person can secure an observation opening for observing the light receiving surface. Adjustment aids.

Images