JP2679176B2 - Video display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an image display device that can be used as a spectacle type display device.

[Summary of the Invention]

The present invention relates to an image display device capable of being a spectacle type display device, including a point light source, a transmissive image plate projected by the point light source, and a short-focus convex lens arranged substantially integrally with the image plate. The point light source directly projects the image on the image plate onto the retina of the eyeball, thereby making it possible to display a clear image regardless of the visual acuity.

[Conventional technology]

Conventionally, when a magnified image is viewed with a convex lens using scattered light, the light emitted from the object AB toward the convex lens (1) proceeds in each direction as shown in FIG. 3, but the representative light (optical axis parallel The optical paths of the light and the lens center light) are as shown in the figure, and this light is not directly formed on the retina of the eyeball but is treated as light coming from the virtual image A'B ', and the eyes indicated by the dotted line The image is formed on the retina by the lens (2).

[Problems to be solved by the invention]

However, in the related art as described above, because of the focal length of the convex lens (1), it is necessary to provide a distance between the convex lens (1) and the object AB, or when the enlargement ratio is increased, distortion occurs in the periphery. However, there is an inconvenience that it is not possible to obtain a spectacles type display device, for example, it is necessary to adjust the diopter due to the difference in the visual acuity of each person.

The present invention has been made in view of the above problems, and an object thereof is to propose an image display device capable of obtaining a clear image regardless of visual acuity.

[Means for solving the problem]

The image display device of the present invention is, for example, as shown in FIG.
Point light source (11) and the image projected by this point light source (11)
The film (12) on which the CD was burned, and this film (1
2) Consists of a short-focus convex lens (13) arranged almost integrally, and this point light source (11) allows an image CD of this film (12)
Is directly projected onto the retina (15) of the eyeball (14).

[Action]

According to the present invention, the transmissive film (12) is projected by the point light source (11), and the image of the film (12) is directly projected by the short focus convex lens (13) which is substantially integrated with the film (12). Since it is projected on the retina (15), clear images can be obtained regardless of the visual acuity.

[Example of actual child]

Hereinafter, the image display device of the present invention will be described with reference to FIG.

In FIG. 1, (13) indicates a short focus convex lens, and the short focus convex lens (13) has a focal length shorter than the size of the eyeball, for example, 2 cm. For example, when constructing a spectacles type display device, this short focus convex lens (13) is fitted into the frame of spectacles. Reference numeral (12) denotes a film as a transmission type image plate, and the film (12) is arranged so as to be in close contact with the short focus convex lens (13) and exchangeable. In this case, the film (12) may be arranged in the short focus convex lens (13). (11) indicates a point light source, and this point light source (1
1) is arranged so that the film (12) is projected. In the figure, (1
6) is the lens of the eye, and (17) is the pupil.

Image printed on film (12) using such a device
When looking at a CD, like a pair of glasses, a short-focus convex lens (13) with a filter (12) closely attached immediately in front of the eyeball.
When the point light source (11) is lit, the light path passing through the image CD printed on the film (12) is limited to only one because it is the point light source, and the transmitted light of the image CD is gathered at one point or discrete. But
In the figure, in the shaded area inside the eye lens (16) of the eyeball (14), the image CD is directly connected to the retina (15) regardless of the position of the retina (15) of the eyeball (14). It can be projected as an image C'D '.

Since the present embodiment is as described above, the transmissive film (12) is projected by the point light source (11), and the image of the film (12) is imaged by the short focus convex lens (13) closely attached to the film (12). CD
Is projected directly onto the retina (15), regardless of visual acuity,
A clear image can be obtained, and if the point light source (11) is arranged on the same center line with respect to the film (12) and the short focus convex lens (13), it becomes a cylindrical display device, and by using a mirror etc. If the light beam is refracted, it becomes thin, and a thin eyeglass-type display device can be obtained.

Although the film (12) is adopted as the image board in the above-mentioned embodiment, the invention is not limited to this, and a transmissive liquid crystal panel of a liquid crystal television receiver may be used instead of the film (12). Can see the TV screen.

Further, a black and white liquid crystal panel is used as a liquid crystal panel, and a dichroic mirror is combined as a backlight to be used as a point light source. As shown in FIG. 2A, red (R), green (G), and blue (B) color surfaces are displayed. The second in synchronization with the sequential video signal
As shown in FIGS. B, C, and D, a color image can be obtained by sequentially emitting light from red, green, and blue light emitting diodes. In this case, since the liquid crystal panel does not need a color filter, there is an advantage that the resolution is tripled. If a mirror is used, the position of the point light source (11) is not restricted. Further, since the backlight serves as a point light source (11), the power can be extremely low.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

〔The invention's effect〕

As described above, according to the present invention, a point light source, a transmissive image plate projected by this point light source, and a short-focus convex lens arranged substantially integrally with this image plate are provided. Thus, the image of the image plate is directly projected onto the retina of the eyeball, so that a clear image display can be performed regardless of the visual acuity, and there is an advantage that a spectacle type display device or the like can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a video display device of the present invention,
FIG. 2 is an explanatory view of another embodiment of the image plate of the present invention, and FIG. 3 is a block diagram of a conventional optical system. (11) is a point light source, (12) is a film (picture board), (13)
Is a short focus convex lens.

Claims (1)

(57) [Claims] 1. An image of the image plate formed by the point light source, comprising: a point light source; a transmissive image plate projected by the point light source; and a short-focus convex lens disposed substantially integrally with the image plate. An image display device characterized in that the image is directly projected onto the retina of the eyeball.