CN201184928Y

CN201184928Y - Head-mounted display

Info

Publication number: CN201184928Y
Application number: CNU2007201749624U
Authority: CN
Inventors: 欧阳军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-13
Filing date: 2007-09-13
Publication date: 2009-01-21
Anticipated expiration: 2017-09-13

Abstract

The utility model discloses a head-mounted display, and aims to provide a head-mounted display with low cost, large viewing angle and high definition. The head-mounted display comprises an outer shell, a liquid crystal screen, a liquid crystal driver plate and a Fresnel lens. The technical proposal of the head-mounted display has the main point that a single-channel imaging device is adopted.

Description

A kind of head mounted display

Technical field

The utility model belongs to a kind of head mounted display.

Background technology

Virtual reality technology can make the people pass through multidimensional sense organs such as vision, colour vision, the sense of hearing, power feel, sense of touch and motion, is immersed among the virtual environment of sense on the spot in person.In virtual reality, you can see and hear, the three-dimensional scenic that has only computing machine to generate, and this needs some special display devices, such as the LCD of helmet-type.Head mounted display in the market exists the cost height basically, and sharpness is low, the shortcoming that field size is little.The image definition that the product that has now gone on the market can be realized has only 320*240 (pixel), can form the picture that is equivalent to 2 meters 30-40 inches, this image definition can only meet the picture quality of the vcd video disc of now having eliminated, can't satisfy the picture quality of the 640*480 (pixel) of the DVD video disc of popularizing already.These head mounted displays are selected conventional optical loupes sheet for use, and field angle is smaller, can only satisfy the simple eye visual angle of watching image, consider and need satisfy the requirement that eyes are watched, and have therefore selected the scheme of dual liquid crystal display+two-way optical loupes basically for use.This scheme can only be selected 0.97 inch LCDs for use, the pixel that can have is also just few a lot, so little liquid crystal display needs to zoom into the picture of 30-40 inch again, image frame is just more coarse, the liquid crystal lattice come clearly into view, influence viewing effect, the cost of high multiple optical loupes also can't reduce.Simultaneously, use double path system in a product, the cost of liquid crystal display+liquid crystal drive plate+optical loupes all doubles, and Here it is causes on the market head mounted display cost height, and sharpness is low, the reason that field size is little.

Summary of the invention

The purpose of this utility model is to solve the cost height that head mounted display in the market exists, and sharpness is low, and the problem that field size is little provides a kind of cost low, sharpness height, the head mounted display that field size is big.

The utility model adopts the small-sized LCDs of a 3.5-5.6 inch and supporting liquid crystal drive plate and shell, and a slice Fresnel Lenses constitutes a kind of novel head mounted display and solves the problems referred to above.

At first, the size of LCDs uses the 3.5-5.5 inch just to have more pixel, has realized the picture quality of 800*600 (pixel) easily, and image shows fine and smooth more, has solved the low problem of sharpness.

Secondly, using 3.5-5.6 inch liquid crystal display and liquid crystal drive plate is the universal elements of easily purchasing on the market, and price is lower.The liquid crystal display mass selling that 3.5 cun 640 * 480 pixel and 5 cun 800*600 pixels are just arranged such as Taiwan great-grand father department of unit.And liquid crystal indicator saves other one the tunnel and just can finish, and therefore cost also reduces.

The 3rd, use 3.5-5.6 inch liquid crystal display picture dimension doubly than the big 4-5 of the LCDs of selecting 0.97 inch for use, optical amplification system does not need the high multiple enlarged image of energy not produce the high-quality optical amplification system of aberration again, reduced the cost of optical amplification system, can produce large scale (80-90 inch) picture, as the viewing effect as the wide-screen in the cinema.

Optical amplification system of the present utility model is selected Fresnel Lenses for use.Fresnel Lenses is a kind of convex lens in essence, and optical property is identical with convex lens.According to the imaging formula of convex lens, we know: LCD can be seen the virtual image of amplifying at a distance in an other side of convex lens within 1 times of focal range of convex lens.Common convex lens are the liquid crystal displays that can't (eyes) watch the 3.5-5.5 inch simultaneously, using Fresnel Lenses is exactly because it has with great visual angle, can watch simultaneously by eyes, common convex lens have been solved because the little problem that can't watch 3.5-5.5 inch liquid crystal display of field angle has obtained desirable optical amplification system.

This head mounted display is made up of shell, LCDs, liquid crystal drive plate, Fresnel Lenses and the helmet (cap).LCDs, liquid crystal drive plate are fixed on the rear end of shell.The front end of shell does not seal, and has viewport, and the user watches image by viewport, and semi-enclosed shell is isolated with the interference of external environment condition simultaneously, and the user obtains a kind of viewing effect of being immersed in the story of a play or opera.At the center section of shell, the fixed installation Fresnel Lenses, user's eyes are by the viewport of shell leading portion, the image of the LCDs of seeing of being amplified by Fresnel Lenses like this.

Shell is fixed on the helmet (cap), and the user can liberate both hands, and the entertainment effect that indulges in luxuriousness to one's heart's desire is realized bimanualness computer mouse keyboard.

The beneficial effects of the utility model are to have realized a kind of low cost, high definition, the head mounted display of big field angle.

Description of drawings

Fig. 1 is the structural representation of specific embodiment of the utility model.

Embodiment

The implementation method of head mounted display is shown in Figure of description: the rear end in a semiclosed shell 1 has fixedly mounted LCDs 3 and liquid crystal drive plate 4, and the middle part of shell has fixedly mounted Fresnel Lenses 2.For the ease of making, shell can separate with the helmet to be made, and is fixed on the brim of a hat of the helmet 5 with screw 6 or other mechanical measures.Liquid crystal drive plate and LCDs have been formed a small-sized LCD, after connecting vision signal, power supply, and display image.After the user put on the helmet, the viewport that eyes see through on the shell 1 just can be seen the liquid crystal panel image that Fresnel Lenses amplifies later.

Claims

1. a head mounted display comprises cap and shell, liquid crystal display, and the liquid crystal drive plate, Fresnel Lenses is characterized in that the shell front end has the hole, the center fixed Fresnel Lenses, outer casing back installs and fixes liquid crystal display, the liquid crystal drive plate, shell is fixed on the cap.