RU2374668C1 - Monitor-glasses for viewing computer and television images with grid focusing system - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: monitor-glasses for viewing computer and television images have liquid crystal matrices with an image focusing system. The focusing system is in form of channels or a grid, lying before and/or behind the liquid crystal matrix and directing the beam to a point near the centre of the eye.

EFFECT: design of a thin, light structure.

3 cl, 4 dwg

Description

The invention relates to the reproduction of computer and video information, and is intended for observing images (possibly stereo) created by computers, television systems, communicators, multimedia players, etc.

Known glasses for observing images (for example, described at http://www.myvu.com) consist of a liquid crystal matrix and an optical focusing system using lenses. In this case, the system is rather cumbersome with isolation of the image field.

The objective of the proposed technical solution is to create a thin (relatively), lightweight design similar to ordinary glasses.

This is achieved by the fact that instead of focusing with the help of lenses, the image is focused by a system of guide channel-holes (grid) in a transparent material located behind the liquid crystal matrix from the side of the eye (although it can also be done from the outside, or both). The channels are designed so that all their axes converge at one point near the center of the eye. More precisely, at the focal point of the retina, which is close to the center of the eye (in addition, this is not important, as it is adjusted by adjustment). Shown in figures 1, 2, 3.

The number of channels may coincide with the number of cells (pixels) of the matrix, and may be less or more (doing more does not make much sense, only for unification). If they coincide, each element of the liquid crystal matrix has its own channel.

The thickness and length of the channel are selected from the conditions of light scattering of the beam and the desired image clarity. The length of the channel is practically equal to the thickness of the plate and affects the overall thickness of the structure.

The channels on the inner surface can be coated with reflective material to reduce light loss. You can not cover if the direction of the rays is provided by the refractive properties of the optical material.

Channels can be created by etching, burning, etc.

Instead of channels made in optical material (glass, plastic, etc.), you can use gratings. Technically, this seems more complicated.

If the channels are made relatively small in cross section, in a transparent material, then the image will be superimposed on the real picture. You can enter an additional layer of liquid crystals in the spaces between the channels and control the transparency (to form a clear image), shown in figure 4. This is a more expensive and complicated solution. You can add a backlight system that does not change the essence of the solution.

Focusing the image is achieved by combining the vanishing point with the focal point of the eye. Therefore, to take into account individual characteristics, the ability to adjust the distance to the eyes and rotation relative to the vertical axis is required. (It is possible, however, to manufacture fixed ones and sell to someone suitable.) Or to produce individually.

Brief Description of the Drawings

In all the drawings (Figs. 1, 2, 3, 4), a section of the monitor glasses and the eye of the observer is shown. (A similar design is used for the second eye).

Moreover, by virtue of central symmetry, this section can be considered drawn both in the vertical and in the horizontal plane.

Figure 1 shows the design when the focusing system in the form of channels is located on the inside of the glasses (closer to the eye).

Figure 2 shows the design when the focusing system in the form of channels is located on the outside of the glasses (further from the eye, behind the LCD matrix).

Figure 3 shows the design when the focusing system in the form of channels is located on two sides of the LCD matrix.

Figure 4 shows the design with the addition of an additional layer of liquid crystals, with a separate control, to control the shading of the background. Such a solution can be added to any of the previous three types of construction, for example, the first is given.

In the drawings, the numbers indicate:

1 - eye of the observer (user);

2 - optical material of glasses (glass, plastic, etc.);

3 - LCD matrix forming an image. Any imaging system is possible (at least slides);

4 - channels in the optical material. Instead of channels, you can use gratings, but in essence it will also be channels;

5 - optical axis of the channels;

6 - vanishing point of the optical axis of the channels;

7 - a layer of liquid crystals for adjustable background shading.

Claims (3)

1. Glasses-monitor for viewing computer and television images based on liquid crystal (LCD) matrices, characterized by an image focusing system, which is a channel or array located before and / or after the LCD matrix directing rays to a point near the center of the eye, which creates picture. 2. Glasses according to claim 1, characterized in that a layer of liquid crystals with an appropriate control circuit is added to the gaps between the channels, providing background shading, if necessary. 3. Glasses according to claim 1 or 2, characterized in that a backlight system is added.

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