JP2007249146A - Inspection auxiliary device for projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection 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 inspection auxiliary device 8 has a darkroom 10, and a pedestal for inspection 30 on which the projector 100 is placed. A distance between the opening for operation of the darkroom 10 and a projection screen arranging part is regulated as a distance required to form an image by projecting projected light to a projection screen 50 by the projector, and an area through which the projected light by the projector 100 does not pass is regulated as a pedestal-for-inspection arranging area where a part of the pedestal for inspection 30 is arranged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inspection auxiliary device used in projector inspection.

Conventionally, a projection image projected on a screen from a projector is observed to inspect whether or not the position of components inside the projector is appropriate.
Examples of such inspection include gradation inspection, color unevenness inspection, and inspection for optical axis adjustment. In order to ensure the accuracy of these inspections, these inspections are performed in a dark room that can block external disturbance caused by light. This dark room and an inspection stand (also called a work desk) on which the projector is placed constitute an inspection auxiliary device.
Since these inspection auxiliary devices are necessary for each process for performing various types of inspections, a large number of such inspection auxiliary 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 inspection 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, it may be necessary to quickly add a production line in order to meet the current market requirements that fluctuate drastically. At this time, it may be necessary to add an inspection 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 inspection auxiliary device. Further, the procurement cost of members such as a converging lens for adding a large number of inspection auxiliary devices may become excessive.

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

According to the first aspect of the present invention, there is provided an inspection auxiliary apparatus having a dark room and an inspection gantry for arranging a projector, wherein the dark room includes a projection screen arrangement unit on which a projection screen is arranged, A work opening facing the projection screen arrangement portion; a light-shielding curtain arranged in the work opening; a side wall portion; a bottom portion; and a ceiling portion; the work opening and the projection screen arrangement portion; Is defined based on a distance necessary for the projector to project an incident light onto the projection screen to form an image, and an area where the incident light does not pass through the projector is used for the inspection. It is defined as an inspection pedestal placement region in which a part of the pedestal is placed, and the light shielding curtain has an entrance opening for allowing the projection light from the projector to pass through, The inspection platform includes a projector arrangement unit that arranges the projector defined in a portion that is not stored in the darkroom, and the projector arrangement unit has a projection lens of the projector when the projector is arranged. This is achieved by an inspection assisting device that is defined as a position corresponding to the entrance opening of the light shielding curtain.

According to the configuration of the first invention, the distance between the work opening and the projection screen arrangement portion is:
The projector is defined based on a distance required for projecting projection light onto the projection screen to form an image. This means that unnecessary space is eliminated in the depth direction while securing a necessary and sufficient distance for the above-described inspection.
Further, an area where the projection light from the projector does not pass is defined as an inspection frame arrangement area where a part of the inspection frame is arranged. For this reason, the space in the darkroom can be used effectively, and the space for installing the inspection auxiliary device can be reduced.
Further, the inspection gantry includes a projector arrangement unit that arranges the projector defined in a portion not stored in the darkroom. The projector arrangement unit defines the projection lens of the projector as a position corresponding to the incident opening of the light shielding curtain when the projector is arranged. For this reason, the projector can be placed outside the dark room, and only the projection light from the projector can enter the dark room.
In addition, the person in charge of the work can perform the inspection work outside the darkroom.
The inspection auxiliary device can be configured simply by defining its size and shape, and it is not necessary to procure components such as a converging lens, a transmissive screen, and a CCD camera, so that it can be quickly deployed according to market demands. This is possible and the expansion cost is low.
As described above, the inspection auxiliary device can be quickly deployed according to market demands, the cost of expansion is low, and the space for deployment can be reduced.

According to a second aspect of the present invention, in the configuration of the first aspect, the inspection gantry includes a lower region having a long depth direction in which a relatively large inspection-related device is arranged, and a part of the lower region is used for the inspection. An inspection assisting device is arranged in a gantry arrangement region.

According to the structure of 2nd invention, since a part of said lower area | region is arrange | positioned in the said test frame arrangement | positioning area | region, the space for arrange | positioning the said test | inspection auxiliary | assistance apparatus can be made small.

According to a third aspect of the invention, in the configuration of the second aspect of the invention, an antireflection means for preventing reflection of light is arranged in the lower region arranged in the examination stand arrangement region. It is an auxiliary device.

According to the configuration of the third aspect of the invention, for example, the reflected light from the projection screen is reflected on the lower area arranged in the inspection gantry arrangement area and is prevented from reaching the projection screen again. be able to. Thereby, it is possible to prevent the reflected light from the lower region from becoming an obstacle to inspection.

According to a fourth aspect of the present invention, in the configuration of the first aspect, a light shielding plate for preventing reflection of light is disposed in the projector arrangement portion, and the light shielding plate is projected from the projection lens. An inspection assisting device having an incident hole through which light passes.

According to the configuration of the fourth invention, since the inspection auxiliary device includes the light shielding plate, the projection light from the projection lens enters the dark room while preventing unnecessary light from becoming an obstacle to inspection. Can be made.

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.

(Embodiment)
FIG. 1 is a schematic side view showing an inspection apparatus 8 according to an embodiment of the present invention. The inspection apparatus 8 is an inspection apparatus for inspecting a projector 100 (see FIG. 5) described later. The inspection device 8 is an example of an inspection auxiliary device.
FIG. 2 is a schematic perspective view showing the dark room 10. The dark room 10 is an example of a dark room.
FIG. 3 is a schematic diagram showing the work desk 30 and the like. The work desk 30 is an example of a work platform.
A projector 100 is disposed on the work desk 30.
FIG. 4 is a schematic diagram showing the work desk 30 and the like.
In the inspection device 8, a projection image projected on the screen 50 from the projector 100 is observed, and an inspection such as whether or not the position of the components inside the projector 100 is appropriate is performed. Examples of such inspection include gradation inspection, color unevenness inspection, and inspection for optical axis adjustment.

(Configuration of projector 100)
FIG. 5 is a schematic perspective view showing an example of an overview of the projector 100 to be inspected in the inspection apparatus 8.
FIG. 6 is a schematic diagram showing main parts of the optical unit 4 constituting the projector 100.
First, the configuration of the projector 100 will be briefly described.

As shown in FIG. 5, the projector 100 includes a housing 100a, a projection lens 100b, and the like.
As shown in FIG. 6, the optical unit 4 of the projector 100 includes an integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an optical device 44 that integrates a light modulation optical system and a color synthesis optical system, and And a projection lens 100b as a projection optical system.

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, the liquid crystal panel 441 emits red light which is color light separated by the color separation optical system 42.
It has a function to guide to R.

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 polarized light in a certain direction out of each color light 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. 1, the light beam projected from the projection lens 100 b gradually spreads and reaches the screen 50.

(Structure of inspection device 8)
As shown in FIG. 2, the darkroom 10 has a screen arrangement wall 16 on which a screen 50 (see FIG. 1) is arranged. The screen arrangement wall 16 is an example of a screen arrangement unit.
The dark room 10 has a work opening 12. The work opening 12 is provided on the screen arrangement wall 1.
6 is disposed opposite to 6. The work opening 12 is an example of a work opening. A light-shielding curtain 13 is disposed in the work opening 12 and is opened and closed according to the inspection purpose.
The light shielding curtain 13 has an incident opening 13a. The incident opening 13a is configured to allow the projection light S (see FIG. 1) from the projection lens 100b of the projector 100 to pass therethrough. The incident opening 13a is an example of an incident opening.
Further, the light shielding curtain 13 has an opening 13b for disposing the work table lower portion. As shown in FIG. 1, the work table lower portion arrangement opening 13 b is a lower region 30 </ b> B that is a part of the lower part 30 </ b> B of the work table 30.
This is a configuration for arranging b in the dark room 10.

The distance d1 (see FIG. 1) between the work opening 12 and the screen arrangement wall 16 is the projector 1
00 is defined based on the distance required for projecting the projection light S onto the screen 50 to form an image. Specifically, the distance d1 is a distance obtained by adding a distance necessary for disposing the screen 50 to the focal length of the projector 100.
Further, as shown in FIG. 1, a region P in which the projection light S does not pass is defined as a region for arranging the lower region 30 </ b> Bb in the dark room 10. The area P is an example of an inspection gantry arrangement area.

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.

As shown in FIG. 3, the work desk 30 includes an upper plate 30a, an intermediate plate 30b, and a bottom plate 30c. The upper side of the intermediate plate 30b is an upper region 30A (see FIG. 4A). The lower side of the intermediate plate 30b is a lower region 30B. The lower region 30B is longer in the depth direction B1 than in the width direction B2.

Further, a monitor support 30d is disposed on the upper plate 30a, and the monitor 102 is disposed. Furthermore, a projector 100, a speaker 104, a converter (switching device) 106, and an illuminometer 108 are arranged on the upper plate 30a.
The projector 100 is arranged in the projector arrangement area 30aa of the upper plate 30a shown in FIG. The projector arrangement area 30aa is an example of a projector arrangement unit.
The projector arrangement area 30aa is defined as a position where the projection lens 100b corresponds to the incident opening 13a (see FIG. 2) of the light shielding curtain 13 when the projector 100 is arranged on the work desk 30. For this reason, the light-shielding curtain 13 does not hinder the passage of the projection light S from the projection lens 100b.

A light shielding plate 32 (see FIG. 4B) is disposed on the upper plate 30a.
As shown in FIG. 4B, the light shielding plate 32 has an incident hole 32a. The incident hole 32a is an example of an incident hole.
The light shielding plate 32 has a property of preventing reflection of light. The light shielding plate 32 is an example of a light shielding plate.
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. 4B, the shape of the light shielding plate 32 is the incident opening 13a of the light shielding curtain 13.
Bigger than. In the state where the projector 100 is disposed on the work desk 30, the light shielding plate 32 and the light shielding curtain 13 are in contact with each other. For this reason, even if the shape of the entrance opening 13a is formed larger than the shape of the projection lens 100b, the light shielding plate 32 can prevent external light from entering the dark room 10.

A projector 100A for warm-up operation and a signal generator 110 are disposed on the intermediate plate 30b.
A relatively large inspection-related device such as the power source 112 is disposed on the bottom plate 30c.

As shown in FIG. 4A, a light shielding cloth 34 is disposed in the lower region 30Bb. The light shielding cloth 34 has a property of absorbing light and not reflecting it. For example, the light shielding cloth 34 can prevent light from the screen 50 from being reflected. The light shielding cloth 34 is an example of an antireflection means.

The inspection device 8 is configured as described above.
In the inspection performed by observing the projection image projected from the projector to the screen, it is sufficient that the projection light S can pass through the dark room 10. It is not necessary to arrange the projector 100 in the dark room 10. Further, it is not necessary for the person in charge of the inspection to perform the inspection work in the dark room 10. In particular, the performance of the light source of the projector has recently been improved, and the inspection person can achieve the inspection purpose even if the person in charge of the inspection is located outside the dark room and observes the screen in the dark room. Specifically, about 800 ANSI (American National Standards In)
The brightness of the lumens (state) is now improved to 2000 to 3000 ANSI lumens. Note that the lumen is a unit representing the brightness of the projector standardized by ANSI (American National Standards Institute).
In this regard, according to the inspection apparatus 8, the distance d1 (the distance between the work opening 12 and the screen arrangement wall 16).
1) is defined as a distance necessary for the projector 100 to project the projection light S onto the screen 50 to form an image. This means that unnecessary space is eliminated in the depth direction while securing a necessary and sufficient distance for the above-described inspection.
Further, an area where the projection light S from the projector 100 does not pass is defined as an area P (see FIG. 1) for arranging a part of the work desk 30. For this reason, the space in the dark room 10 can be used effectively, and the space for installing the inspection apparatus 8 can be reduced.
Furthermore, the work desk 30 has a projector arrangement area 30aa (see FIG. 3) defined in a portion that is not stored inside the darkroom 10. The projector placement area 30aa is defined as a position where the projection lens 100b of the projector 100 corresponds to the entrance opening 13a of the light shielding curtain 13 when the projector 100 is placed. Therefore, the projector 100 is placed outside the dark room 10 and only the projection light S from the projector 100 is sent to the dark room 1.
It can be made incident within zero.
Further, the person in charge of inspection can perform inspection work outside the darkroom 10.
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.

Further, a light shielding cloth 34 (see FIG. 4) for preventing light reflection is disposed in the lower region 30Bb.
For this reason, for example, it is possible to prevent the reflected light from the screen 50 from being reflected by the lower region 30Bb and reaching the screen 50 again. Thereby, the lower region 30B
It is possible to prevent the reflected light from b from becoming an obstacle to inspection.

Further, a light shielding plate 32 for preventing light reflection is disposed in the projector arrangement region 30aa. Since the light shielding plate 32 has an incident hole 32a, unnecessary light is prevented from becoming an obstacle to inspection. However, the projection light S from the projection lens 100b can enter the dark room 10.

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 perspective view which shows a dark room. Schematic which shows a work desk etc. FIG. Schematic which shows a work desk etc. FIG. 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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 8 ... Inspection apparatus, 10 ... Dark room, 12 ... Work opening, 14 ... Bottom part, 16 ... Screen arrangement wall, 18A, 18B ... Side wall, 20 ... Ceiling, 50 ... Screen, 100 ... Projector, 10
0b: Projection lens.

Claims (4)

An inspection auxiliary device having a darkroom and an inspection stand for arranging a projector,
The darkroom is
A projection screen placement section on which the projection screen is placed;
A work opening facing the projection screen placement section;
A light-shielding curtain disposed in the work opening;
A side wall,
The bottom,
The ceiling,
Have
The distance between the working opening and the projection screen arrangement portion is defined based on a distance required for the projector to project an incident light onto the projection screen to form an image.
An area through which the projection light from the projector does not pass is defined as an inspection rack arrangement area in which a part of the inspection rack is arranged,
The blackout curtain is
Having an incident aperture for allowing projection light from the projector to pass through;
The inspection platform is
A projector placement section for placing the projector defined in a portion not stored in the darkroom;
The said projector arrangement | positioning part is a test | inspection assistance apparatus characterized by the projection lens of the said projector being prescribed | regulated as a position corresponding to the said entrance opening of the said light-shielding curtain when the said projector is arrange | positioned. The inspection platform has a lower region with a long depth direction in which a relatively large inspection-related device is arranged,
The inspection assisting apparatus according to claim 1, wherein a part of the lower region is disposed in the inspection frame arrangement region. The inspection auxiliary device according to claim 2, wherein an antireflection means for preventing reflection of light is arranged in the lower area arranged in the examination stand arrangement area. In the projector arrangement part, a light shielding plate for preventing reflection of light is arranged,
The inspection auxiliary apparatus according to claim 1, wherein the light shielding plate has an incident hole through which the projection light projected from the projection lens passes.

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