CN102109677A - Head-mounted stereoscopic visual slide viewer - Google Patents

Abstract

The invention discloses a head-mounted stereoscopic visual slide viewer, which belongs to the field of virtual reality and comprises two liquid crystal display screens vertically arranged, half-reflecting and half-transmitting glass, two magnifying lenses and a polarizing sheet, wherein the half-reflecting and half-transmitting glass is positioned between the two liquid crystal display screens; one side of the half-reflecting and half-transmitting glass is close to the joint of the two liquid crystal display screens, and the included angles with the two liquid crystal display screens are the same; and the magnifying lens is positioned between the half-reflecting and half-transmitting glass and the polarizing sheet. The head-mounted stereoscopic visual slide viewer has the advantages of overcoming the limitation of the visual angle through the traditional sheet absorber aperture diaphragm and amplifying the visual field; the half-reflecting and half-transmitting glass is simple and convenient in design, and the optical aberration is reduced so that the stereoscopic visual function is realized with high quality; and the head-mounted stereoscopic visual slide viewer has small weight, good imaging effect and great market potential.

Description

Head-mounted stereo vision film viewer

technical field

The invention relates to a head-mounted stereoscopic film viewer, in particular to a head-mounted stereoscopic film viewer with an optical structure, belonging to the field of virtual reality.

Background technique

Virtual Reality (Virtual Reality, referred to as VR, also translated as spiritual realm, illusion) is a high-tech emerging in recent years, also known as spiritual realm technology or artificial environment. Virtual reality is the use of computer simulation to generate a three-dimensional virtual world, providing users with simulations of vision, hearing, touch and other senses, allowing users to observe things in the three-dimensional space in a timely and unlimited manner .

The slide viewer is commonly known as the slide viewer. A conventional film viewer is an auxiliary device that enables easy viewing of magnified slides. Head-Mounted Display (HMD), also known as near-eye display, is a large-screen portable high-immersion stereoscopic image display device that is widely used in various fields.

With the vigorous development of 3D display technology, head-mounted displays with stereoscopic vision functions have been widely used and popularized. 3D stereoscopic display technology is revolutionizing and changing people's communication, work and lifestyle. In 2010, the global industrial environment represented by 3D TV and 3D film and television is becoming more and more mature. Compared with traditional displays, the biggest feature of stereoscopic displays is that stereoscopic displays can truly experience the huge impact and extreme shock brought by stereoscopic vision. , so whether the three-dimensional effect is strong or not is an important index to measure the three-dimensional display products. Stereoscopic display uses technological means to restore the real three-dimensional world of human beings, and will lead the development trend of video technology in the future.

However, in order to ensure the quality of stereoscopic display, the traditional film viewer sets an aperture diaphragm behind the magnifying lens, which greatly limits the user's field of view. This stereoscopic display method can no longer meet the user's requirements for resolution, field of view and portability. and many other requirements. Although multifunctional miniaturized electronic display devices can bring convenience to users, "portable" and "miniaturized" also limit the size of the display screen, and the smaller display screen is likely to cause eye fatigue for users. Therefore, how to make a single device have both the characteristics of "miniaturization" and "big display" has become an important problem to be solved urgently.

Contents of the invention

The object of the present invention is to solve the above problems, and to design a head-mounted stereoscopic film viewer with the characteristics of "miniaturization" and "big display".

To achieve the above object, the present invention adopts the following technical solutions:

The head-mounted stereo vision film viewer includes a helmet bracket for fixing the entire film viewer on the head, and a vision system positioned in front of the human eye and installed on the helmet bracket, wherein the vision system includes 2 Liquid crystal display screen, transflective glass, 2 magnifying lenses and polarizers; said polarizers are placed side by side in front of the two eyes of people, and the polarization directions of these two polarizers are perpendicular to each other; On one side, two magnifying lenses coaxial with the polarizer are respectively arranged side by side, and the magnifying lens is located between the transflective glass and the polarizer; the two liquid crystal display screens are placed perpendicularly to each other, and one of the liquid crystal The display screen is parallel to the magnifying lens, and the other LCD screen is placed on the magnifying lens and parallel to the optical axis of the magnifying lens; the transflective glass is located in the middle of the two LCD screens, and one side is close to the two LCD screens The junction, and the angle with the two LCD screens is equal.

There is a certain overlapping portion between the liquid crystal screens to achieve the purpose of expanding the viewing angle, and the size of the overlapping area is determined according to actual needs.

The degree of tightness of the helmet bracket can be adjusted according to the size of the wearer's head.

The vision system also includes a housing made of opaque material, two holes are opened on the side of the housing facing the human eyes, and the two holes are respectively blocked by polarizers.

The shell is fixed on the helmet bracket, and the polarizer is made to face people's eyes when in use.

The shell is also provided with a light-shielding sealing sleeve, and the light-shielding sealing sleeve is used to keep the entire visual system in a dark room environment.

The transflective glass is rectangular.

The visual system is connected to an electronic device with a playback function using a data cable to obtain information to be displayed;

The vision system is powered by batteries or a power cord connected to an external electronic device.

Compared with the prior art, the beneficial effects of the head-mounted stereo vision film viewer of the present invention are reflected in:

1. Large field of view, wide field of view and high resolution, eliminating visual fatigue caused by long-term observation of nearby objects;

2. In order to prevent the user from seeing redundant images and affecting the stereoscopic effect, the traditional film viewer sets an aperture diaphragm behind the magnifying lens, while the present invention expands the field of view and increases the stereoscopic area by placing the liquid crystal screen vertically , eliminating binocular competition;

3. The structure is simple, the design is light and handy, it is convenient for industrial production and the cost is low.

Description of drawings

Fig. 1 is a top view of the internal structure of the present invention;

Fig. 2 is the internal structure side view of the present invention;

Fig. 3 is a schematic diagram of the appearance of the present invention and its communication structure.

Each label in the figure means:

1. User 2. User's right eye 3. User's left eye 4. Analyzer with vertical polarization direction 5. Analyzer with horizontal polarization direction 6. Right magnifying lens 7. Left magnifying lens 8. Horizontal placement LCD screen 9. Vertically placed LCD screen 10. Semi-reflective and translucent glass 11. Signal power cable.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the head-mounted stereoscopic film viewer is symmetrically distributed with the bridge of the user's nose as the center line, and includes 2 LCD screens, transflective glass, 2 magnifying lenses and polarizers.

The 2 liquid crystal display screens display image information for the left and right eyes respectively, the liquid crystal screen 8 placed horizontally is used to display the image for the right eye, and the liquid crystal screen 9 placed vertically is used to display the image for the left eye, which improves the resolution of the image; The liquid crystal screen is placed vertically to solve the constraints of the aperture diaphragm set by the traditional film viewer to ensure the stereoscopic effect on the field of view, and to increase the viewing range.

As shown in FIG. 1 , there is a certain overlapping portion between the liquid crystal screens 8 and 9 to achieve the purpose of expanding the viewing angle. The size of the overlapping area is determined according to actual needs, and has no influence on the stereoscopic imaging effect.

The semi-reflective and semi-transparent glass is located between the two liquid crystal screens, one side of which is close to the junction of the two liquid crystal screens and is equal to the angle between the two liquid crystal screens. From the Fresnel formula, it can be known that when the electric vector E propagates on the interface, the direction of p-light and s-light changes in reflection and refraction. The light radiated from the liquid crystal screen 9 passes through the magnifying lens after being refracted by the transflective film, while the light from the liquid crystal screen 8 is reflected through the magnifying lens, so the polarization directions of the two beams of light form an included angle of 90°.

The magnifying lens is used to magnify the image. The optical system only includes a group of magnifying lenses, which reduces the phase difference of the image due to the optical system and makes the image more real and clear.

The polarizer is used to form stereoscopic vision. The optical system in front of the user adds polarizers with different polarization directions. The image signals of the two eyes form a phase difference through the semi-reflective and semi-transparent glass, and the optical system is magnified and modulated by the polarizer. Projected on the user's retina to form a three-dimensional image.

Considering the need of portability, the head-mounted device of the present invention does not carry a power source itself, and uses a data cable to connect to an electronic device with a playback function to obtain information to be displayed. If the head-mounted display device is allowed to have a slightly larger volume, a battery compartment can also be provided, and the battery provides power for the head-mounted display device.

The invention has the advantages of overcoming the limitation of the viewing angle by the aperture diaphragm of the traditional film viewer and increasing the viewing field; the design of the semi-reflective and semi-transparent glass is simple and light, the aberration is reduced, and the function of stereoscopic vision is realized with high quality ; The weight is small, the imaging effect is good, and there is great market potential.

Under the above teaching of the present invention, those skilled in the art can make various improvements and modifications on the basis of the above embodiments, and these improvements or modifications fall within the protection scope of the present invention. Those skilled in the art should understand that the above specific description is only for the purpose of explaining the present invention, and is not intended to limit the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims (9)

1. A head-mounted stereo vision film viewer, comprising a helmet mount for fixing the whole film viewer to the head, and a vision system positioned at the front of the human eye and mounted on the helmet mount, characterized in that the The vision system includes 2 liquid crystal display screens (8,9), transflective glass (10), 2 magnifying lenses (6,7) and polarizers (4,5); the polarizers (4,5) Placed side by side in front of the two eyes of the person, and the polarization directions of the two polarizers are perpendicular to each other; on the side where the polarizer (4, 5) is far away from the human eye, two polarizers coaxial with the polarizer (4, 5) are respectively arranged. The magnifying lenses (6, 7) placed side by side; the magnifying lenses (6, 7) are located in the middle of the transflective glass (10) and the polarizer (4, 5); the two liquid crystal display screens (8, 9) Place them perpendicular to each other, and one of the LCD screens (9) is parallel to the magnifying lens (6, 7), and the other LCD screen (8) is placed on the magnifying lens (6, 7) and connected to the magnifying lens The optical axes of (6, 7) are parallel; the semi-reflective and semi-transparent glass (10) is located in the middle of the two liquid crystal display screens (8, 9), and one side thereof is close to the junction of the two liquid crystal display screens (8, 9); and It is equal to the included angle of two liquid crystal display screens (8, 9). 2. the head-mounted stereo vision film viewer as claimed in claim 1, is characterized in that, certain overlapping portion is arranged between described liquid crystal screen (8,9), to reach the purpose of expanding viewing angle; The size of the overlapping area is determined according to actual needs. 3. The head-mounted stereoscopic film viewer as claimed in claim 1, wherein the helmet bracket can adjust the degree of tightness according to the size of the wearer's head. 4. The head-mounted stereoscopic film viewer as claimed in claim 1 or 2, wherein the visual system also includes a shell made of an opaque material, and the shell is opened towards the side of the human eye. There are two holes, and the two holes are respectively blocked by polarizers (4, 5). 5. The head-mounted stereoscopic film viewer as claimed in claim 4, characterized in that: the housing is fixed on the helmet bracket, and the polarizers (4, 5) are facing people's eyes during use. 6. The head-mounted stereoscopic film viewer as claimed in claim 4, characterized in that, the housing is also provided with a light-shielding sealing sleeve, and the light-shielding sealing sleeve is used to keep the entire visual system in a dark room environment. 7. The head-mounted stereoscopic film viewer according to claim 1-3, characterized in that, the transflective and translucent glass (10) is rectangular. 8. The head-mounted stereoscopic film viewer according to claim 1-3, wherein the visual system adopts a data line (11) to be connected to an electronic device with a playback function to obtain information to be displayed; 9. The head-mounted stereoscopic film viewer according to claims 1-3, wherein the visual system is powered by a battery or a power cord connected to an external electronic device.

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