JP2001255586A - Projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector device capable of viewing a video projected on a screen by a projector while not transmitting the video to behind the screen, but viewing the video through the front surface of the screen from behind the screen. SOLUTION: The projector device 1 is provided with a polarizing screen 4 equipped with a reflection surface 2 for transmitting light and also reflecting projected light and a polarizing surface 3 whose polarizing direction is specified, and a projector 5 for irradiating the polarizing screen 4 with the projected light whose polarizing direction is orthogonal to that of the polarizing surface 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector apparatus for projecting an image on a screen by a projector, and more particularly to a projector apparatus for projecting an illuminated image from behind the screen without passing through the screen. The present invention relates to a projector device capable of performing the following.

[0002]

2. Description of the Related Art Conventionally, when an image is projected on a screen by a projector, as shown in FIG.
The projection plane 31 is irradiated with projection light by the projector 132 to project an image. At this time, since the conventional screen was non-transparent, from the back side of the screen,
I couldn't see through the front of the screen.

[0003] Therefore, when the vehicle is installed in a vehicle such as an automobile, if a screen is installed behind the driver's seat in front of the rear seat so that an occupant sitting in the rear seat can view the image, the driver cannot drive. There was a problem that the hand could not check the situation behind.

In view of this, a screen is formed using a sunshade of an automobile in which fine holes are formed on one surface of a sheet having a black back surface and a white color front surface.

[0005] According to this sunshade, the driver can see behind because the opposite side can be seen through a small hole.

[0006]

However, in the above-described conventional sunshade, when an image is projected on the sunshade from the rear seat side by a projector, the image projected through a small hole enters the driver's seat side. for,
There was a problem of dazzling the driver.

The present invention has been made in view of the above circumstances, and an object of the present invention is to allow an image projected on a screen to be seen through the front of the screen from behind the screen without being transmitted behind the screen. An object of the present invention is to provide a projector device.

[0008]

According to a first aspect of the present invention, there is provided a projector apparatus comprising:
A polarizing screen having a reflecting surface that transmits light and reflects projection light and a polarizing surface having a specific polarization direction,
And a projector for irradiating the polarizing screen with projection light having a polarization direction orthogonal to the polarization direction of the polarization plane.

According to the first aspect of the present invention, the image projected on the polarizing screen can be seen through the front of the polarizing screen from behind the polarizing screen without passing through the screen behind the screen.

The projector device according to the second aspect of the present invention is characterized in that a polarizing screen is installed in front of a rear seat of a vehicle, and the projector irradiates the polarizing screen with projection light from the rear seat side.

According to the second aspect of the present invention, the driver can check the situation behind the vehicle, and the driver is not disturbed by the light projected from the projector. Further, in the rear seat, the occupant can see the projected image projected on the polarizing screen.

According to a third aspect of the present invention, in the projector device, the windshield of the vehicle is a windshield having a polarization direction orthogonal to the polarization direction of the polarization plane.

According to the third aspect of the present invention, even when the outside of the vehicle is bright during the daytime or when there is some light source outside the vehicle, the external light does not affect the image on the screen. The video becomes easy to see regardless of the environment.

According to a fourth aspect of the invention, there is provided a projector device, wherein a polarizing screen is installed in a show window.
The projector irradiates the projection light onto the polarizing screen from the indoor side of the show window.

According to the fourth aspect of the present invention, it is possible to view the exhibits on the shop window from outside,
From inside, you can see the exhibits with the projected image projected on the screen in the background.

According to a fifth aspect of the invention, there is provided the projector device, wherein the window glass of the show window is a window glass having a polarization direction orthogonal to the polarization direction of the polarization plane.

According to the fifth aspect of the present invention, even when the outdoors are bright during the daytime or when there is some light source outside, the external light does not affect the image on the screen. The video becomes easy to see regardless of the environment.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the projector according to the present invention will be described below with reference to the drawings.

First, the configuration of the projector device of the present embodiment will be described with reference to FIG. As shown in FIG. 1, a projector device 1 of the present embodiment has a polarization plane having a reflection plane 2 that transmits light by mesh holes or stripe printing and reflects projection light, and a polarization plane 3 having a specific polarization direction. Screen 4 and projector 5 for projecting projection light having a polarization direction orthogonal to the polarization direction of the polarization plane
It is composed of

Here, the configuration of the polarizing screen 4 will be described. The polarizing screen 4 may be manufactured by stripe printing or manufactured by mesh holes.

First, the case of stripe printing will be described. As shown in FIG. 2A, one surface of a polarizing film layer 21 serving as a base has a black print 2 serving as a base of an ink layer.
2 is performed, and white printing 23 for projecting the image of the projector is further performed thereon. When a solvent or scratch is applied to the ink layer to form a stripe pattern, FIG.
As shown in (b), the polarizing film layer 24 and the ink layer 25
Can be manufactured.

The ink layer 25 does not need to have a two-layer structure of white and black if silver printing is performed.

Next, the case using mesh holes will be described. In the case of this polarizing screen, first, a mesh hole as shown in FIG.
When the sheet with the mesh holes is bonded to the polarizing film, a polarizing screen having a two-layer structure including the polarizing film 31 and the sheet with the mesh holes 32 as shown in FIG. Can be.

Next, the configuration of the projector 5 will be described with reference to FIG.

As shown in FIG. 4, the projector 5 includes a light source 41 such as a lamp, a polarizing plate 42 having a horizontal polarization direction, a liquid crystal display device (LCD) 43, and a polarization having a vertical polarization direction. It is composed of a plate 44 and a lens 45.

In the projector 5 configured as described above, the polarization state of the light generated by the light source 41 is first aligned in the horizontal direction by the polarizing plate 51 to become horizontal polarized light, as shown in FIG. . Here, when the horizontal polarized light passes through the LCD 52, an image is entered, and the polarization direction is rotated by 90 degrees to become vertical polarized light. Then, the vertically polarized light passes through a polarizing plate 53 having a vertically polarized direction, and is irradiated on a white irregular reflection surface 54 of a polarizing screen.

Thus, the projection image having the vertical polarization direction emitted from the projector 5 is projected on the white irregular reflection surface 54 of the polarizing screen. However, since the polarizing film layer 55 having the horizontal polarization direction is provided on the back side of the polarizing screen as described above, the projected image cannot pass through the polarizing screen.

However, since natural light does not have a specific polarization direction, it can be transmitted through the polarizing screen without being blocked by the polarizing film layer 55.

Accordingly, as shown in FIG. 6, on the front side of the polarizing screen 61, the projection light is reflected by the white irregular reflection surface 62, and the projected image is projected on the screen.

On the other hand, on the back side, the projected light cannot pass through the polarizing film layer 63, so that the projected image cannot be observed. However, since natural light can pass through the polarizing film layer 63, the situation on the screen front side can be observed even from the back side.

Next, an in-vehicle projector as a first example of installation of the above-described projector will be described with reference to FIG.

As shown in FIG. 7, in this vehicle-mounted projector device, a polarizing screen 71 is installed in front of a rear seat of a vehicle, and a projector 72 irradiates the polarizing screen 71 with projection light from the rear seat side. The projected image is projected on the polarizing screen 71.

With this arrangement, the natural light passes through the screen, so that the driver can check the situation behind the driver and the projected image does not enter the driver's seat. It is no longer dazzled by the projected light. Further, in the rear seat, the occupant can see the image projected on the screen.

Next, a case where the windshield of the vehicle in which the above-mentioned vehicle-mounted projector device is installed is a windshield having a polarization effect will be described.

As shown in FIG. 8, by attaching a polarizing sheet having a vertical polarization direction to the windshield 81, the windshield 81 is provided with a vertical polarization effect. As a result, only the vertically polarized light of the light from outside the vehicle passes through the windshield 81, and the polarizing film layer of the polarizing screen 82 has a horizontal polarization direction. From the front side.

Therefore, the relationship between the transmission of the projection light and the natural light on the polarizing screen at this time is as shown in FIG.
In addition to the reflection at 1, the projection image is projected on the screen, and the projection light transmitted through the white irregular reflection surface 91 cannot be transmitted through the polarizing film layer 92. Further, of the natural light incident from the rear seat side, the light transmitted through the white diffusely reflecting surface 91 also transmits through the polarizing film layer 92 and is incident on the driver's seat, whereby the driver can check the situation behind.

On the other hand, the natural light transmitted through the windshield 93 is vertically polarized, and is polarized vertically.
2 cannot be transmitted, so that when viewed from outside the vehicle through the polarizing screen from the rear seat side, the vehicle looks dark.

Therefore, even when the outside of the vehicle is bright during the daytime or when there is some light source outside the vehicle, the external light does not affect the image on the screen, so that the image can be easily viewed regardless of the environment outside the vehicle. Become.

Next, a second embodiment of the shop window projector will be described with reference to FIG.

As shown in FIG. 10, in this shop window projector device, a polarizing screen 101 is installed in the show window, and the projector 102 irradiates the polarizing screen 101 with projection light from the indoor side of the show window.

As a result, from the outside, as shown in FIG.
2 can be seen. In contrast, from indoors,
As shown in FIG. 1B, the exhibit 112 can be viewed with the image projected on the polarizing screen 111 as a background.

Also, by providing the window glass of the show window with a polarizing effect, the daytime outdoor is bright as in the vehicle-mounted projector device of the first embodiment, similarly to the case where the windshield is provided with the polarizing effect. Even when there is a light source at some time or outdoors, the external light does not affect the image on the screen, so that the image on the screen can be easily viewed from indoors regardless of the outdoor environment.

In the above-described embodiment, the case where the projector is provided with the polarizing plate has been described. However, the same effect can be exerted by using a projector without the polarizing plate.

In this case, a polarizing plate 122 is provided between the polarizing screen 123 and the projector 121 as shown in FIG. Thus, the projection light emitted from the projector 121 is given a specific polarization direction by the polarizing plate 122 and cannot pass through the polarizing screen 123.

Therefore, the same effects as those of the above-described projector device can be exhibited.

[0046]

As described above, according to the projector apparatus of the present invention, the image projected on the polarizing screen is not transmitted behind the screen, and the front of the screen is seen through from behind the polarizing screen. be able to.

Therefore, when the projector device of the present invention is installed in a vehicle, the driver can check the situation behind and the driver is not disturbed by the projection light of the projector.

Further, when the projector device of the present invention is installed in a show window, the exhibit in the show window can be viewed from the outside, and the exhibit can be viewed from the indoor with the projected image projected on the screen in the background. You can see.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a projector device according to the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a polarizing screen shown in FIG.

FIG. 3 is a diagram for explaining a configuration of a polarizing screen shown in FIG.

FIG. 4 is a diagram for explaining a configuration of the projector shown in FIG.

FIG. 5 is a diagram for explaining a polarization state of projection light by the projector device of the present invention.

FIG. 6 is a view for explaining a light transmission state in the polarizing screen shown in FIG. 1;

FIG. 7 is a diagram illustrating an example of installation of the projector device of the present invention in a vehicle.

FIG. 8 is a diagram for explaining a polarization state of light in an example of installation on a vehicle.

FIG. 9 is a diagram for explaining a light transmission state of a polarizing screen of the example of installation on the vehicle shown in FIG. 8;

FIG. 10 is a diagram illustrating an example of installation of the projector device of the present invention on a show window.

FIG. 11 is a diagram for explaining how to display an exhibit in the example of installation on a show window shown in FIG. 10;

FIG. 12 is a diagram showing a modification of the projector device of the present invention.

FIG. 13 is a diagram for explaining a light transmission state in a conventional projector device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Projector apparatus 2 Sheet 3 Polarizing sheet 4, 46, 61, 71, 82, 101, 111, 123
Polarizing screen 5, 72, 102, 121, 132 Projector 21 Polarizing film layer 22 Black printing 23 White printing 24, 55, 63, 92 Polarizing film layer 25 Ink layer 31 Polarizing film 32 Sheet 41 Light source 42, 44 Polarizing plate 43, 52 Liquid crystal display device (LCD) 45 Lens 51, 53, 122 Polarizing plate 54, 62, 91 White diffusely reflecting surface 81, 93 Front glass 112 Exhibit 131 Screen

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H021 AA05 BA21 3D020 BA04 BB01 BC01 BD05 5C058 DA06 EA01 EA02 EA31 5G435 AA00 BB12 DD06 DD09 FF05 GG02 GG23 GG46 KK05 LL15

Claims (5)

[Claims] 1. A polarizing screen having a reflection surface that transmits light and reflects projection light and a polarization surface having a specific polarization direction, and a projection screen having a polarization direction orthogonal to the polarization direction of the polarization surface. A projector device comprising: a projector that irradiates a polarizing screen. 2. The projector device according to claim 1, wherein the polarizing screen is installed in front of a rear seat of a vehicle, and the projector irradiates the projection screen with the projection light from the rear seat side. 3. The projector device according to claim 2, wherein the windshield of the vehicle has a polarization direction orthogonal to a polarization direction of the polarization plane. 4. The projector device according to claim 1, wherein the polarizing screen is installed in a show window, and the projector irradiates the projection light onto the polarizing screen from an indoor side of the show window. 5. The projector device according to claim 4, wherein a window glass of the show window has a polarization direction orthogonal to a polarization direction of the polarization plane.