JP3024383U - Video display - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a video display device in which a screen frame and a housing of the video projection device are not seen and a contrast between a video image to be observed and a background is high. SOLUTION: A hafmirer arranged in front of an observer A
15 and a video projection device 11 disposed on the reflection surface side of the half mirror 15, a neutral filter 17 having a wider area than the video screen 12 of the video projection device 11 is projected. It is arranged between the video screen 12 of the device 11 and the reflection surface side of the half mirror 15.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a video display device used for learning, entertainment, advertisement and the like.

[0002]

[Prior art]

 Recently, optical display means including dynamic elements such as movies and televisions have come to be used for video display devices used for learning and the like. In particular, a number of image display devices have been proposed which combine a still image and a moving image by utilizing a half mirror and a concave mirror. For the purpose of learning, these image display devices display images recording the movements of the celestial body and the earth, the ecology of various animals and plants on the screen, and synthesize them with the background stereo model and still images through the harf mirror. Is being used.

In the image display device, there are a color monitor that reproduces an image by a signal from a video tape recorder, a video disc player or the like as a video projection device, or a combination of a projector or a slide projector and a screen. Further, in the video projection device used for the image display device, the screen frame or the case of the monitor or the screen frame is generally black.

If the screen when the image is not displayed, that is, the background is gray instead of black, the screen frame or the like is visible to the observer due to the contrast between the gray background and the black screen frame or the like. It was visible. When the background was gray, the contrast between the image of the observation target and the background was low, and the image of the observation target was not clearly visible. For this reason, there is a drawback in that the sense of presence as an image is lost and the observer lacks interest.

[0005]

[Problems to be solved by the device]

 It is an object of the present invention to provide an image display device in which the image frame of the image projection device and the housing are not seen and the contrast between the image of the observation target and the background is high.

[0006]

[Means for Solving the Problems]

 This invention is an image display device having a half mirror arranged in front of an observer and an image projection device arranged on the reflection surface side of a half mirror, and has a wider area than the image screen of the image projection device. The feature is that the neutral filter is placed between the image screen of the image projector and the reflection surface side of the half mirror.

As the image projection device, a color monitor that reproduces an image by a signal from a video tape recorder, a video disc player, or the like, or a combination of a projector or a slide projector and a screen is used. Neutral filters are optical filters that reduce the intensity of light with almost no color change. As the neutral filter, a thin cloth (for example, gauze), an antiglare filter, a polarizing plate, or smoke acrylic is used as the neutral filter. The absorptivity of the neutral filter is selected according to the background gray level brightness, and a filter that does not show the screen frame is used. The light amount of the image is reduced because it passes through the neutral filter, but the image brightness of the image of the image projection device may be correspondingly increased to compensate for the insufficient light amount.

Further, the exhibit is arranged at a position facing the viewer on the non-reflective surface side of the half mirror, and the virtual image on the image screen and the exhibit are overlapped with each other via the half mirror. You may observe. The exhibits include, for example, models of houses, buildings, automobiles, fruits, vases, and sake bottles.

According to this invention, the image of the image projection device is projected on the half mirror through the neutral filter. The gray background appears black because it is observed through the neutral filter. For this reason, the background and screen frame appear to be solid black, and the screen frame and case are not visible. Also, since the background is black, it seems that the contrast with the image of the observation target is high. Therefore, the observer does not feel any unnaturalness in the image because only the image of the observation target (virtual image of the image screen) is emphasized and observed. In addition, in an apparatus in which an exhibit is placed on the non-reflective surface side of the harf mirror, the virtual image on the video screen and the exhibit appear to be superimposed, resulting in a stereoscopic effect.

[0010]

[Embodiment of device]

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial side sectional view of an image display device of the present invention, and FIG. 2 is a front view thereof.

An upper portion of the display device main body 1 is a color monitor room 2, and a portion directly below the color monitor room 2 is a mirror box 4. The color monitor room 2 and the mirror box 4 are separated by a shielding wall 6 having a projection opening 7.

A color monitor 11 as a video projection device is housed in the color monitor chamber 2 with the video screen 12 facing downward. A video disc player (not shown) is connected to the color monitor 11.

The mirror box 4 has an observation window 5 on the observer A side (front side), and a half mirror 15 is provided in the mirror box 2 at an angle of about 45 ° with respect to the horizontal plane. The half mirror-15 has a semi-transparent acrylic film attached to one surface of a transparent acrylic plate, and the acrylic film side serves as a reflecting surface. The half mirror 15 is arranged such that the reflection surface is on the side of the video screen 12 of the color monitor 11.

The projection opening 7 is larger than the screen frame 13 of the color monitor 11, and a neutral filter 17 is attached to the shielding wall 6 so as to cover the projection opening 7. The neutral filter 17 is made of gauze. The light amount of the image is reduced because it passes through the neutral filter 17, but the brightness of the image on the color monitor 11 is increased accordingly to compensate for the insufficient light amount.

An exhibit 18 is arranged on the back side of the hammilla 15. A fluorescent lamp 19 installed in the color monitor room 2 illuminates the exhibit 25 through an illumination opening 8 provided behind the shielding wall 6.

The observation window 5 of the mirror boss 4 may be provided with a transparent protective glass, if necessary. An amplifier 21, a CD player 22, a speaker 23, a ventilation fan 25, etc. are arranged in the display device body 1.

With the above configuration, when the inside of the mirror box 4 is viewed through the observation window 5, the virtual image and the half mirror of the image screen 12 of the color monitor 11 which are transmitted through the neutral filter 17 and reflected on the half mirror 15. The exhibit 18 installed on the back side of 15 is overlaid and observed. The gray background of the color monitor 11 is seen through the neutral filter 17 and thus appears black. For this reason, the background, the casing of the color monitor 11, the screen frame 13, and the like all appear to be solid black, and the screen frame 13 and the like cannot be seen. In addition, the contrast between the background and the image of the observation target is high.

[0018]

[Effect of device]

 In this invention, since the neutral filter is interposed between the image projection device and the half mirror, the background of the image projection device, the screen frame, the casing, etc. all appear to be solid black. For this reason, the observer cannot see the device body such as the screen frame, so that the image does not feel unnatural. Also, since the image of the observation target appears to have a higher contrast than the background, only the image of the observation target appears to be emphasized. Therefore, the interest of the observer can be increased.

[Brief description of drawings]

FIG. 1 is a side partial cross-sectional view of an image display device of the present invention.

FIG. 2 is a front view of the device shown in FIG.

[Explanation of symbols]

 1 Video display device main body 2 Color monitor room (video projection device room) 4 Mirror box 5 Observation window 6 Shielding wall 7 Projection opening 8 Illumination opening 11 Color monitor (video projection device) 12 Video screen 13 Screen frame 15 Ha Fumira 17 Neutral filter 18 Exhibit 19 Lighting

Claims (3)

[Scope of utility model registration request] 1. A half mirror arranged in front of an observer.
In the image display device including the image projection device disposed on the reflection surface side of the half mirror, a neutral filter having a wider area than the image screen of the image projection device is connected to the image screen of the image projection device. An image display device characterized in that it is arranged between the reflection surface side of the Fumira. 2. The image display device according to claim 1, wherein the brightness of the image of the image projection device is increased so as to compensate for the decrease in the light amount of the image due to the neutral filter. 3. The image display device according to claim 1, wherein the exhibit is arranged at a position facing the observer on the non-reflective surface side of the hammilla.