JPH0934389A - Information aerial display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information aerial display device which enables an image formed in the air to be seen directly with the eye not through an obstacle such as a transparent plate and can display the image just nearby an observer. SOLUTION: A projector 1 and a gradient-index lens element 3 are installed at positions where the light emission surface 2 of the projector 1 and the end surface of the gradient-index lens element 3 becomes parallel to each other and the light emission surface 2 of the projector 1 can be mapped as an erect real image of nonmagnification by the lens element 3, and the projector 1 and gradient-index lens element 3 are arranged for the observer so that the sight line V of the observer becomes perpendicular to the light emission surface 2 of the projector 1 and the end surface of the gradient-index lens element 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention displays information such as materials or manuscripts in the air at a TV conference, briefing, lecture, reception, etc. so that only a person who needs the information can see the displayed image. The present invention relates to an information aerial display device that can be used.

[0002]

2. Description of the Related Art Conventionally, when conducting a video conference, briefing, lecture, speech, etc., when a speaker needs information such as materials and manuscripts for that purpose, he / she writes the information on a table. I used to put it in a place such as holding a memo in my hand. In this case, in order to see the information, the line of sight has to be kept away from the other party, that is, the TV or the audience, which is inconvenient. Therefore, it has been considered that the information cannot be viewed without displaying the line of sight of the other party (TV or audience) by displaying the information in the air. In order to realize this with a conventional technique, it is conceivable to use a head-up display as a display device that makes an image visible in the air.

This is a device in which a projector such as a fluorescent tube is placed in front of a transparent plate and an image is displayed on the plate. For example, it is used as a display for aiming a missile of a fighter. . Further, it is also used for displaying a speedometer of an automobile or for displaying information for navigation.

FIG. 2 shows the structure of a conventional head-up display. An image of a fluorescent tube (projector) 11 is projected on a curved transparent plate 10 on the inner surface of which a reflective film 13 is pasted, and a visible image 12 is formed on the outside of the transparent plate 10.

The conventional head-up display has a problem in that the visible image 12 is visible to the other side of the transparent plate 10 when viewed by an observer. That is, it is not suitable for forming fine information (for example, a picture, a figure, a character, etc.) as a visible image 10.

In order to make the visible image 10 large, it is sufficient to connect the images at a distant place, but when the image is enlarged, the distortion becomes large and the light emission amount of the light source of the fluorescent tube 11 becomes large. There is a need. Therefore, it is difficult to display detailed information by enlarging the image, which is difficult.

Further, in the conventional head-up display, since the image is seen through the transparent plate, the transparent plate 10 obstructs the field of view, and the quality of the image (resolution, color feeling, etc.) is slightly inferior. It was

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and the object thereof is to avoid an obstacle such as a transparent plate, It is an object of the present invention to provide an information aerial display device capable of directly seeing an image floated in the air and displaying the image in the immediate vicinity of an observer.

[0009]

The information aerial display device according to the present invention achieves the above-mentioned object, and is as follows. Projector and gradient index lens element,
The light emitting surface of the projector and the end surface of the gradient index lens element are parallel to each other, and the light emitting surface of the projector is located at a position where it can be imaged by the refractive upright lens element as an erecting equal-magnification real image. , Install each.

Further, the projector and the gradient index lens element are arranged such that the normal to the light emitting surface of the projector and the end surface of the gradient index lens element is parallel or substantially parallel to the line of sight of the observer. To the observer.

Here, the gradient index lens element is a gradient index rod lens having a predetermined length, which is a graded index (GI) type optical fiber.
A plurality of optical elements are arranged in a matrix so that both end surfaces form the same plane, and have the function of mapping an object at a predetermined position as an erecting equal-magnification real image. There is. The above-mentioned observer is a person who views a screen displayed in the air by the information aerial display device according to the present invention.

[0012]

The projector has a light emitting surface on which information to be displayed by floating in the air, that is, characters, symbols, figures, pictures or moving images is placed. Therefore, an electroluminescent display such as an LCD (Liquid Crystal Display) is included in the projector referred to herein, and the screen of the electronic display is
It is natural that it can be a light emitting surface.

The information displayed on the light emitting surface (screen) of an LCD or the like is incident on the gradient index lens element facing the light emitting surface as a light beam. The light ray incident on the gradient index lens element travels while meandering and exits from the other end surface of the gradient index lens element.

In the present invention, the distance from the light emitting surface to the gradient index lens element is a position at which the light emitting surface can be imaged as a real image of erecting equal magnification, so that the gradient index lens element A light beam emitted from the other end face and from the information placed on the light emitting surface is imaged at a predetermined position as a real image of an erecting equal-magnification ratio.

Further, the light emitting surface and the gradient index lens element are arranged so that a viewer's line of sight (line of sight) is perpendicular to both end surfaces of the light emitting surface and the gradient index lens element. Therefore, the observer can view the real image of the erecting equal-magnification by pointing the line of sight toward the other end surface of the gradient index lens element and adjusting the focus of the eye to the screen displayed in the air. can do.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an information aerial display device according to the present invention applied to a video conference.
Is installed, and an aerial information display device is provided at a corner where the conference attendees are seated.

For the projector 1, for example, an OHP (overhead projector) is used. The document 5 is placed on the light emitting surface 2 of the projector 1. As the material 5, a transparent sheet in which desired information is written may be used.

Document 5 shows that some of the conference participants
It may be replaced as appropriate, or some device (not shown)
Therefore, it may be automatically replaced.
Moreover, if a display such as an LCD is used for the projector 1,
It is not necessary to put the document 5 on the light emitting surface 2. The screen itself of the display serves as a light emitting surface and a material, and is displayed as an aerial display surface (real image) 4 by the gradient index lens element 3.

In FIG. 1, the line of sight V of the conference participant, that is, the observer is shown by a chain line. Thus, in the present invention, the end surface of the gradient index lens element 3 and the light emitting surface 2 of the projector 1 are perpendicular to the line of sight of the observer when viewing the aerial display surface 4. Refractive index type lens element 3
And the projector 1 is installed.

FIG. 3 shows an embodiment of the present invention for displaying necessary information to a speaker. INDUSTRIAL APPLICABILITY The present invention is suitable for displaying information necessary only for a speaker during a speech at a wedding reception, a speech at a lecture, a briefing at a press conference, and the like.

In FIG. 3, the projector 1 includes, for example, an LC
If a D (liquid crystal display) is used, the material 5 placed on the light emitting surface 2 as shown in FIG. 1 is not necessary. Further, the storage device 15 may be provided inside the projector 1.

In order to actually make a speech using the present invention, information to be displayed is stored in the storage device 15 in advance, and an observer, that is, a person who gives a speech operates the screen switching input 16. It is convenient to switch the screen (light emitting surface 2) of the LCD (projector 1) according to the above.

[0023]

Since the present invention is configured as described above, it has the following effects. Since the image floated in the air can be directly seen with eyes without passing through an obstacle such as a transparent plate, a high-quality image can be displayed in the air. Moreover, since an image can be displayed in the immediate vicinity of the observer, a detailed information such as characters, figures and pictures can be displayed in the air to provide an information aerial display device in which only the observer can observe. It is possible.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an information aerial display device in a video conference.

FIG. 2 is a diagram showing a configuration of a conventional head-up display.

FIG. 3 is a diagram showing an embodiment of an information aerial display device.

[Explanation of symbols]

 1 Projector 2 Light-Emitting Surface 3 Gradient Index Lens Element 4 Aerial Display Surface (Real Image) 5 Material 6 Chair 7 Television 8 Table 9 Observer's Eye 10 Transparent Plate 11 Fluorescent Tube (Projector) 12 Visible Image 13 Reflection Membrane 14 Microphone 15 Storage device 16 Screen switching input C Center of curved surface of transparent plate F Focus V Eyes of observer

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[Procedure amendment]

[Submission date] June 5, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

The information aerial display device according to the present invention achieves the above-mentioned object, and is as follows. Projector and gradient index lens element,
The light emitting surface of the projector is parallel to the end surface of the gradient index lens element, and the light emitting surface of the projector is the refraction surface.
It is installed at a position where it can be mapped as a real image of an erecting equal-magnification by the rate distribution type lens element.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

Further, the projector and the gradient index lens element are arranged such that the normal to the light emitting surface of the projector and the end surface of the gradient index lens element is parallel or substantially parallel to the line of sight of the observer. To the observer.

Claims (1)

[Claims] 1. A real image of an equal-magnification erection by the refraction distribution lens element so that the light emission surface of the projector and the end surface of the gradient index lens element are parallel to each other. The projector and the gradient index lens element are respectively installed so that they can be mapped, and the line of sight of an observer is perpendicular to the light emitting surface of the projector and the end surface of the gradient index lens element. As described above, the information aerial display device, wherein the projector and the gradient index lens element are arranged for an observer.