WO2005093512A1

WO2005093512A1 - Video display system

Info

Publication number: WO2005093512A1
Application number: PCT/JP2005/005179
Authority: WO
Inventors: Takashi Kuwabara; Susumu Ibaraki; Hiroyuki Hamada; Kazumasa Nagashima
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2004-03-26
Filing date: 2005-03-23
Publication date: 2005-10-06
Also published as: JP2005275287A

Abstract

A video display system (10) comprising a video display (20) having a display surface (21a) for displaying a video image, a polarization film (31) for polarizing a video image light forming a video image, and a polarization film (32) for polarizing a non-video image light being other than the video image light and impinging on the polarization film (31) toward the display surface (21a), wherein the polarization film (31) is arranged at a position between a predetermined position for showing a video image to a user (61) and the display surface (21a) whereas the polarization film (32) is arranged at a position other than any position between the predetermined position for showing the video image to the user (61) and the polarization film (31) and has a polarizing direction different from that of the polarization film (31). The video display system (10) thus arranged can display an easy-to-view video image to the user as compared with conventional systems.

Description

Specification

Video display system

Technical field

The present invention relates to a video display system for displaying a video.

Background art

[0002] To date, various image display systems have been provided. As one typical type of image display system, for example, a polarization direction of display light emitted from a display screen of a vehicle-mounted display device, There is disclosed an in-vehicle display system that is configured so that a polarization transmission direction of a rear view of a vehicle is substantially perpendicular to the vehicle and reduces a dazzling effect on a following vehicle due to display light emitted from a display screen.

Patent Document 1: JP-A-10-51764 (Page 2-3, Figure 1-2)

Disclosure of the invention

Problems to be solved by the invention

[0003] However, since the conventional video display system is intended to reduce the dazzling effect of the display screen on the following vehicle, for example, light other than display light such as illumination light or sunlight (hereinafter, referred to as "light"). When "external light" is reflected on the display screen, there is a problem that the image displayed on the display screen is difficult for a user to see due to the external light reflected on the display screen.

[0004] The present invention has been made to solve the conventional problems, and has as its object to provide a video display system capable of displaying a video that is easier for a user to view than in the past. Means for solving the problem

[0005] According to a first aspect of the present invention, an image display system of the present invention includes an image display device having a display surface for displaying an image, and an image display device for polarizing image light, which is light constituting the image. An image light polarization member, and a non-image light polarization member that polarizes non-image light other than the image light and entering the image light polarization member toward the display surface. The member is disposed at a position between a predetermined position for showing the image to a user and the display surface, and the non-image light polarizing member is disposed at the predetermined position and the image light polarizing member. And a polarization direction different from that of the image light polarizing member. Have.

[0006] With this configuration, in the video display system of the present invention, the video light polarizing member suppresses non-video light such as illumination light or sunlight from reaching the display surface. It is possible to display a video which is easy to see.

[0007] Further, the video display system of the present invention may be configured such that the video display device includes a projector that projects light on the display surface, and a screen on which the display surface is formed. .

[0008] With this configuration, the image display system of the present invention can display an image such as a CRT (Cathode-Ray Tube) or a PDP (Plasma Display Panel) by receiving non-image light such as illumination light or sunlight. Even in a video display device having a screen on which a display surface on which a video display state is likely to be deteriorated compared to the display surface of the device, a video which is easy for a user to see can be displayed.

[0009] The image display system according to the present invention may further include the image display system including a first position between the predetermined position and the display surface, and a second position other than between the predetermined position and the display surface. It may have a configuration provided with a support device that movably supports the light polarizing member.

[0010] With this configuration, the video display system of the present invention can show the video to the user as necessary without the intervention of the video light polarizing member. Compared to a configuration that cannot be shown to the user, it is possible to display an image that is easy for the user to see when non-image light such as illumination light or sunlight hardly reaches the display surface.

[0011] Further, the video display system of the present invention includes an illuminating device that illuminates the predetermined position.

The non-image light polarizing member may have a configuration in which illumination light of the illumination device is polarized as the non-image light.

[0012] With this configuration, the image display system of the present invention does not need to reduce the amount of illumination light of the illumination device when presenting the image displayed on the display surface to the user, and thus the image displayed on the display surface. Displaying images and images that are easier for the user to view while the illumination device illuminates a specified position compared to a configuration in which the amount of illumination light from the illumination device must be reduced when the Can be. [0013] Further, in the image display system of the present invention, the image display device may have a configuration in which the image is displayed with light polarized in a direction substantially the same as the polarization direction of the image light polarizing member. ,.

[0014] With this configuration, the image display system of the present invention can suppress the amount of image light from being reduced by the image light polarizing member, and thus can display an image with light polarized in a direction different from the polarization direction of the image light polarizing member. Compared to the configuration in which the display device displays an image, it is possible to display an image that is easy for the user to see.

[0015] In the video display system of the present invention, the video display device may be any one of red, green, and blue, and a first light that is a single color of light and is polarized; The image is displayed with two colors of light other than the first light and polarized second light, and the polarization direction of the first light and the polarization direction of the second light are different from each other. Alternatively, the image light polarizing member may have a configuration in which the angle formed by the polarization direction is substantially the same.

[0016] With this configuration, in the image display system of the present invention, since the light amounts of the red, green, and blue image lights are substantially uniformly reduced by the image light polarizing member, the light amounts of the red, green, and blue image lights are reduced. It is possible to display an image that is easy for the user to see, as compared with a configuration in which the image light is non-uniformly reduced by the image light polarizing member.

[0017] In the video display system of the present invention, the video light polarizing member is arranged at a position where light projected by the projector is directed toward the display surface, and the projector is provided with the video light polarizing member. It may have a configuration in which light polarized in a direction substantially the same as the polarization direction is projected toward the display surface.

[0018] With this configuration, the image display system of the present invention can suppress the amount of light projected on the projector power screen from being reduced by the image light polarizing member. As compared with a configuration in which the projector projects the polarized light toward the display surface, it is possible to display an image that is easy for the user to see.

Further, in the video display system of the present invention, the video light polarizing member is disposed at a position where the light projected by the projector is incident on the display surface, and the projector is provided with red, green, and blue. The first projection light, which is light of any one of the colors and is polarized, and the second projection light, which is light of two colors other than the first projection light of red, green, and blue and is polarized, The above table The projection light is directed toward the display surface, and the polarization direction of the first projection light and the polarization direction of the second projection light are different from each other, and the angle formed by the polarization direction of the image light polarization member is substantially the same. You may.

With this configuration, in the video display system of the present invention, the amount of red, green, and blue light projected from the projector onto the screen is reduced substantially uniformly by the video light polarizing member. Compared with the configuration in which the amounts of red, green, and blue light are unevenly reduced by the image light polarizing member, an image that is easy for the user to see can be displayed.

Further, the video display system of the present invention may have a configuration mounted on a moving object.

[0022] With this configuration, in the video display system of the present invention, the video light polarizing member suppresses the light from the outside of the moving body from reaching the display surface, so that the light from the outside of the moving body enters the inside of the moving body. Even if the amount and direction of the emitted light changes due to the movement of the moving object, it is possible to display an image that is easy for the user to see.

According to a second aspect of the present invention, a moving object of the present invention has a configuration including any of the above-described video display systems.

[0024] With this configuration, in the moving body of the present invention, since the image light polarizing member suppresses external light from reaching the display surface, the light amount and direction of light incident from the outside to the inside can be reduced. Even if it changes due to the movement of the image, it is possible to display an image that is easier for the user to see than before.

The invention's effect

[0025] The present invention can provide an image display system that can display an image that is easier for a user to view than in the past.

Brief Description of Drawings

FIG. 1 is a top view for explaining the principle of a video display system according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of an automobile equipped with the video display system shown in FIG. 1.

[FIG. 3 (a)] FIG. 3 (a) is a partially cut-away side view of the automobile shown in FIG. 2 when a polarizing film is used. The

[FIG. 3 (b)] FIG. 3 (b) is a partially cut-away side view of the automobile shown in FIG. 2 when a polarizing film is stored.

[FIG. 4] FIG. 4 is a partially cut-away side view of an automobile equipped with the video display system according to the first embodiment of the present invention, which is different from the example shown in FIG.

FIG. 5 is a top view of an image display system according to the first embodiment of the present invention, which is different from the example shown in FIG. 1.

FIG. 6 is a side sectional view of a room in which a video display system according to a second embodiment of the present invention is installed.

Explanation of symbols

[0027] 10 Video display system

20 Video display device

21 screen

21a Display surface

22 Projector

31 Polarizing film (image light polarizing member)

32 Polarizing film (non-image light polarizing member)

42 Rotation support (support device)

60 Car (mobile)

61 users

70 Video display system

80 Lighting equipment

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Example 1

First, the configuration of the video display system according to the first embodiment will be described.

As shown in FIGS. 1 to 3, video display system 10 according to the present embodiment is installed in automobile 60 as a moving object. Further, the video display system 10 includes a video display device 20 having a screen 21 on which a display surface 21a for displaying video is formed, and a projector 22 for projecting light onto the display surface 21a of the screen 21, and a light passing therethrough. A polarizing film 31 and a polarizing film 32 that polarize the light; a roll 41 that is installed substantially at the center of the ceiling inside the automobile 60 and can be wound around the screen 21 to be stored; As shown in FIGS. 3 (a) and 3 (b), a rotation support section 42 is provided as a support device for rotatably supporting the polarizing film 31.

Here, the screen 21 is a reflection type screen that maintains the polarization direction of light, that is, a silver screen.

The projector 22 divides the light of the light source into three colors of red, green and blue by a dichroic mirror, and the light passing through the liquid crystal panel for each color is projected on the display surface 21 a of the screen 21 to form an image. The liquid crystal panels for red, green, and blue have substantially the same polarization direction. The projector 22 is installed behind the ceiling inside the automobile 60.

The polarizing film 31 is set so as to have a polarization direction substantially the same as the polarization direction of the liquid crystal panel for each color of red, green and blue of the projector 22 in the state shown in FIG. 3A. ing. The polarizing film 31 polarizes image light, which is light constituting an image displayed on the display surface 21a of the screen 21, and forms an image light polarizing member. When the polarizing film 31 is in the state shown in FIG. 3A, the polarizing film 31 is seated on a predetermined position for showing the image displayed on the display surface 21a of the screen 21 to the user 61, that is, on the rear seat of the automobile 60. It is arranged between the position of the eyes of the user 61 and the display surface 21a of the screen 21.

The polarizing finolem 32 is attached to the window glass on the side of the automobile 60 so that the polarizing direction is substantially orthogonal to the polarizing film 31 in the state shown in FIG. 3A. That is, the polarizing finolem 32 is arranged at a position other than between the position of the eyes of the user 61 sitting on the rear seat of the car 60 and the polarizing film 31 in the state shown in FIG. . The polarizing film 32 is light other than image light, and is non-image light incident on the polarizing film 31 toward the display surface 21a of the screen 21, for example, the inside of the automobile 60 through the window glass from the outside of the automobile 60. The light, such as the light from the sun 62, incident on the portion is polarized, and constitutes a non-image light polarizing member.

Next, the operation of the video display system 10 will be described.

When light enters the interior of the automobile 60 through the window glass from the outside of the automobile 60, the polarizing film 31 is brought into a state shown in FIG.

In the state shown in FIG. 3A, when the projector 22 projects light toward the screen 21, the projection light of the projector 22 passes through the polarizing film 31 having substantially the same polarization direction.

The light is reflected by the screen 21 while maintaining the polarization direction.

Then, the projection light of the projector 22 reflected by the screen 21 again passes through the polarizing film 31 whose polarization direction is substantially the same, and the user sitting on the rear seat of the automobile 60

It strikes the 61st eye.

[0038] Further, light that enters the interior of the automobile 60 through the window glass from outside the automobile 60 passes through the polarizing film 32 and is polarized by the polarizing film 32 into only one-directional component. The light is blocked by a polarizing film 31 substantially orthogonal to 32 and does not reach the screen 21.

On the other hand, when light from the outside of the car 60 does not enter the inside of the car 60 through the window glass, such as at night, the polarizing film 31 is brought into the state shown in FIG. Is done.

In the state shown in FIG. 3B, when the projector 22 projects light toward the screen 21, the projection light of the projector 22 reaches the screen 21 without passing through the polarizing film 31. The light is reflected by the screen 21 while maintaining the polarization direction.

Then, the projection light of the projector 22 reflected by the screen 21 does not pass through the polarizing film 31 and enters the eyes of the user 61 sitting on the rear seat of the automobile 60.

As described above, since the polarizing film 31 suppresses the light outside the vehicle 60 from reaching the display surface 21a of the screen 21, the image display system 10 Even if the amount and direction of light incident on the inside of the vehicle is changed by the movement of the automobile 60, it is possible to display an image that is easier for the user 61 to see than before. The image display system 10 also suppresses non-image light from reaching the display surface 21a of the screen 21. Shina Power S et al. Show the outside view of the car 60 to the user 61 via the polarizing film 32.

Further, in the image display system 10, a display surface 21a in which the display state of an image is easily deteriorated by the arrival of non-image light compared to the display surface of an image display device such as a CRT or a PDP is formed. Even the image display device 20 having the screen 21 can display an image that is easy to see for the user 61. Note that the video display system 10 may include a video display device such as a CRT or PDP instead of the video display device 20.

Further, the video display system 10 includes a first position shown in FIG. 3A between a position of an eye of a user 61 sitting on a rear seat of the car 60 and a display surface 21a of the screen 21. The polarizing film 31 is movably supported between the position of the eyes of the user 61 sitting in the rear seat of the car 60 and the second position shown in FIG. 3B except between the display surface 21a of the screen 21 and the second position. The rotation support section 42 is provided, and the image can be shown to the user 61 without passing through the polarizing film 31, so that the image cannot be shown to the user 61 without passing through the polarizing film 31. In comparison, when the non-image light is difficult to reach the display surface 21a of the screen 21, an image that is easy to see for the user 61 can be displayed. Further, the image display system 10 moves the polarizing film 31 to the second position shown in FIG. 3 (b) when the non-image light is difficult to reach the display surface 21a of the screen 21 and the vehicle 60 The space inside can be secured.

Further, the video display system 10 has a polarizing film 31 disposed at a position where light projected by the projector 22 is directed toward the display surface 21 a of the screen 21, and the polarization direction of the polarizing film 31 is substantially the same as that of the polarizing film 31. The projector 22 projects the light polarized in the direction toward the display surface 21a of the screen 21 to prevent the amount of light projected from the projector 22 onto the screen 21 from being reduced by the polarizing film 31. As compared with a configuration in which the projector 22 projects light polarized in a direction different from the polarization direction of the polarizing film 31 toward the display surface 21 a of the screen 21, it is possible to display an image that is easy for the user 61 to see.

In the image display system 10, the image display device 20 displays an image on the display surface 21a of the screen 21 with light polarized in substantially the same direction as the polarization direction of the polarizing film 31. Since the amount of light can be suppressed from being reduced by the polarizing film 31, Compared to the configuration in which the image display device 20 displays an image on the display surface 21a of the screen 21 with light polarized in a direction different from the polarization direction of the polarizing film 31, the ability to display an image that is easy for the user 61 to see S it can.

The screen 21 is desirably a silver screen, but may be a surface diffusion type screen. Further, the screen 21 can be housed by being wound around the roll 41, but may be housed by another method or may not be housed.

In the projector 22, it is preferable that the polarization directions of the liquid crystal panels for red, green, and blue are substantially the same, but the polarization directions of the liquid crystal panels for red, green, and blue are different from each other. They may be different from each other. When the polarization directions of the liquid crystal panels for the red, green, and blue colors of the projector 22 are different from each other, the image display system 10 is provided with the projector 22 and the polarizing film 31 so that the deviation of each color is minimized. Is desirable. For example, when the polarization directions of the liquid crystal panel for red and the liquid crystal panel for blue of the projector 22 and the polarization direction of the liquid crystal panel for green are substantially orthogonal to each other, the image display system 10 It is desirable that the projector 22 and the polarizing film 31 be installed so that the polarization direction of the liquid crystal panel for each color and the polarization direction of the polarizing film 31 make an angle of about 45 °.

[0049] The image display system 10 includes a first projection light, which is a light of any one of red, green, and blue and is polarized, and a second projection light of red, green, and blue other than the first projection light. The projector 22 projects the light and the polarized second projection light toward the display surface 21a of the screen 21, and the polarization direction of the first projection light and the polarization direction of the second projection light are different from each other. When the polarization direction of the light and the polarization direction of the second projection light make substantially the same angle with the polarization direction of the polarizing film 31, the amounts of red, green, and blue light projected from the projector 22 to the screen 21 are reduced. Since the amount of the red, green, and blue light projected from the projector 22 to the screen 21 is reduced non-uniformly by the polarizing film 31, the user can reduce the light intensity substantially uniformly by the polarizing film 31. An easy-to-view image can be displayed on 61.

[0050] The image display system 10 includes a first light polarized in one of red, green, and blue and two colors other than the first light in red, green, and blue. And the second polarized light The image display device 20 displays an image on the display surface 21a of the screen 21, and the polarization directions of the first light and the second light are different from each other, and the polarization directions of the first light and the second light are polarized. When the angle formed by the polarization direction of the film 31 is substantially the same, the amount of red, green, and blue image light is reduced almost uniformly by the polarizing film 31, so that the red, green, and blue images are reduced. Compared to a configuration in which the amount of light is unevenly reduced by the polarizing film 31, an image that is easy to see for the user 61 can be displayed.

[0051] The projector 22 may be a projector other than a power three-panel liquid crystal projector that is a three-panel liquid crystal projector. For example, the projector 22 may be a single-panel type liquid crystal projector or a DLP (Digital Light Processing) projector. In the case of a projector in which the projection light is not polarized, such as a DLP projector, the installation angle of the polarizing film 31 is not limited by the polarization characteristics of the polarizing film 31.

The polarization finolem 31 preferably has a polarization direction substantially the same as the polarization direction of the liquid crystal panel for each color of red, green, and blue of the projector 22, but is different from the polarization direction of the liquid crystal panel. It may be in the direction. In addition, the polarizing film 31 is housed by being rotated by the rotation support part 42 and is housed by being wound around the roll 41 together with the screen 21 by being attached to the front surface of the screen 21 and the like. Alternatively, the storage may be performed by another method, or the storage may not be possible.

The polarizing film 32 is affixed to the window glass on the side of the automobile 60 in FIG. 2, but may be arranged at a position other than the side of the automobile 60. For example, the polarizing film 32 may be affixed to the window glass on the back of the car 60. Further, it goes without saying that the polarizing film 32 may be attached to both the side window and the rear window of the automobile 60. In addition, the polarizing film 32 may be lit for shellfish inside or outside the window glass, or may be provided separately from the window glass.

As shown in FIG. 4, the image display system 10 includes a reflecting member 51 that reflects the light projected from the projector 22 and a reflecting member 51 installed on the rear side of the ceiling inside the automobile 60. And a rotation support portion 52 rotatably supported like a polarizing film 31 shown in FIG.

Further, as shown in FIG. 5, the video display system 10 The projector 22 may be installed on the rear side to project light from the rear side of the screen 21.

Example 2

First, the configuration of the video display system according to the second embodiment will be described. Note that among the configurations of the video display system according to the present embodiment, the same configuration as the configuration of the video display system according to the first embodiment is the same as the configuration of the video display system according to the first embodiment. The same reference numerals are given and the detailed description is omitted.

As shown in FIG. 6, video display system 70 according to the present embodiment is installed in room 90.

Further, the video display system 70 includes a video display device 20 having a screen 21 and a projector 22 provided on a wall surface of a room 90 having a display surface 21 a formed thereon, and a polarization device attached to a front surface of the screen 21. A film 31; a lighting device 80 installed on the ceiling of the room 90 to illuminate the position of the user; and a lighting device 80 attached to the surface of the lighting device 80 such that the polarization direction of the polarizing film 31 is substantially orthogonal to the lighting device 80. And a polarizing film 32 for polarizing the illumination light.

Next, the operation of the video display system 70 will be described.

When the projector 22 projects the light toward the screen 21, the projection light of the projector 22 passes through the polarizing film 31 having substantially the same polarization direction, and is reflected by the screen 21 while maintaining the polarization direction.

Then, the projection light of the projector 22 reflected by the screen 21 passes through the polarizing film 31 having substantially the same polarization direction again, and enters the eyes of the user inside the room 90.

On the other hand, the illuminating light of the illuminating device 80 passes through the polarizing film 32 and is polarized by the polarizing film 32 into only one direction component, and is polarized by the polarizing film 31 whose polarization direction is substantially orthogonal to the polarizing film 32. Shut off, screen 21 is not reached.

As described above, the image display system 70 turns off or turns off the illumination of the illumination device 80 when displaying the image displayed on the display surface 21a of the screen 21 to the user. Since there is no need to reduce the amount of illumination light of the screen 21, it is displayed on the display surface 21a of the screen 21. Compared to a configuration in which the amount of illumination light of the lighting device 80 must be reduced when the image to be shown is shown to the user, an image that is easy for the user to see while the interior of the room 90 is illuminated by the lighting device 80 Can be displayed.

[0062] The lighting device 80 is installed on the ceiling of the room 90, but may be installed in a place other than the ceiling. For example, the lighting device 80 may be installed on the wall of the room 90. In addition, when the image display system 70 includes a plurality of lighting devices 80, it is sufficient if the polarizing film 32 is attached to each surface of the plurality of lighting devices 80. Furthermore, when the room 90 has a window through which external light such as sunlight is incident, the polarizing film 32 may be stuck to the window, needless to say.

Further, similarly to the first embodiment, the video display system 70 is configured such that the projector 22 is installed on the back side of the screen 21 and the projector 22 projects light from the back side of the screen 21. It may be. Further, the image display system 70 is provided with a rotating support portion 42 for rotating the polarizing film 31 or a roll 41 for winding and storing the screen 21, and the polarizing film 31 is rotated by the rotating supporting portion 42. May be stowed, or may be stowed by other methods, such as being stuck on the front of the screen 21 and wound around the screen 21 together with the screen 21. Needless to say, it may be impossible to store.

Industrial applicability

[0064] As described above, the video display system according to the present invention has an effect of displaying a video that is easier for the user to view as compared with the related art, and is useful as an in-vehicle video display system or the like. .

Claims

The scope of the claims

[1] An image display device on which a display surface for displaying an image is formed, an image light polarizing member for polarizing image light which is light constituting the image, and a light other than the image light, wherein the display surface A non-image light polarizing member that polarizes non-image light incident on the image light polarizing member toward

The image light polarizing member is disposed at a position between a predetermined position for showing the image to a user and the display surface,

The image display system, wherein the non-image light polarizing member is arranged at a position other than between the predetermined position and the image light polarizing member, and has a polarization direction different from that of the image light polarizing member.

2. The video display system according to claim 1, wherein the video display device includes a projector that projects light onto the display surface, and a screen on which the display surface is formed.

[3] A support for movably supporting the image light polarizing member between a first position between the predetermined position and the display surface and a second position other than between the predetermined position and the display surface. The video display system according to claim 1, further comprising a device.

[4] An illumination device for illuminating the predetermined position,

The video display system according to claim 1, wherein the non-video light polarizing member polarizes illumination light of the illumination device as the non-video light.

5. The video display system according to claim 1, wherein the video display device displays the video using light polarized in substantially the same direction as the polarization direction of the video light polarizing member.

[6] The image display device may include a first light polarized in one of red, green, and blue and light of two colors other than the first light in red, green, and blue. Displaying the image with the polarized second light,

The image display according to claim 1, wherein the polarization direction of the first light and the polarization direction of the second light are different from each other, and an angle formed by the polarization direction of the image light polarization member is substantially the same. system.

[7] The image light polarizing member receives light projected by the projector toward the display surface. It is placed at the position where it is fired,

3. The image display system according to claim 2, wherein the projector projects light polarized in a direction substantially the same as a polarization direction of the image light polarizing member toward the display surface.

[8] The image light polarizing member is arranged at a position where light projected by the projector toward the display surface is incident,

The projector emits polarized light of one color, which is one of red, green and blue, and light of two colors other than the first projected light of red, green and blue. And projecting the second projection light polarized toward the display surface,

3. The polarization direction of the first projection light and the polarization direction of the second projection light are different from each other, and an angle formed by the polarization direction of the image light polarization member is substantially the same. An image display system according to item 1.

[9] The video display system according to claim 1, wherein the video display system is mounted on a moving object.

[10] A moving object comprising the video display system according to any one of claims 1 to 8.