CN101794027A - Front projection self-stereoscopy three-dimensional display device based on cylindrical grating - Google Patents

Abstract

Translated fromChinese

本发明公开了一种基于柱面光栅屏的前投影自体视三维显示装置。基于柱面光栅屏的前投影自体视三维显示装置包括依次放置的柱面光栅屏、纵向散射屏和投影机，柱面光栅屏的柱面朝向投影机并且镀有反射膜，纵向散射屏紧贴柱面光栅屏放置，投影机投影由三维物体多个视角的透视投影图像组合而成的三维图像到柱面光栅屏，构成每个透视投影图像的投影光束分别被反射到对应的视点以形成多视点自体视三维显示。本发明采用前投影系统构造三维显示器，可用于需要大场景、大画面三维图像的三维影院，并且可裸眼观看。

The invention discloses a front projection self-stereoscopic three-dimensional display device based on a cylindrical grating screen. The front-projection self-viewing three-dimensional display device based on a cylindrical grating screen includes a cylindrical grating screen, a longitudinal scattering screen and a projector placed in sequence. The cylindrical surface of the cylindrical grating screen faces the projector and is coated with a reflective film. The cylindrical lenticular screen is placed, and the projector projects a three-dimensional image composed of perspective projection images from multiple perspectives of the three-dimensional object onto the cylindrical lenticular screen. The projection beams that constitute each perspective projection image are reflected to the corresponding viewpoints to form multiple The viewpoint is a three-dimensional display from a stereoscopic view. The invention adopts a front projection system to construct a three-dimensional display, which can be used in three-dimensional theaters that require three-dimensional images of large scenes and large screens, and can be viewed with naked eyes.

Description

Front projection self-stereoscopy three-dimensional display device based on cylindrical grating

Technical field

The present invention relates to three-dimensional display apparatus, relate in particular to a kind of front projection self-stereoscopy three-dimensional display device based on the cylindrical grating screen.

Background technology

3-D display is different from the two dimension demonstration will bring visual depth perception to the beholder by the whole bag of tricks exactly, make its nature or obtain the information of third dimension degree in the picture artificially, the nature of this obtain manner and nature just have the difference of very three-dimensional and false three-dimensional (accurate in other words three-dimensional) for the beholder.Dimension display technologies develops into and has produced a large amount of achievements today, and these achievements roughly can be divided into hologram three-dimensional demonstration, body 3-D display, stereoscopic 3-D display etc.Holographic technique can produce Space very true to nature, but its high-resolution spatial light modulator of needs and superfast data handling system aspect dynamic demonstration, these two factors have greatly limited this makes this development of technology, makes it can't enter practical application well at present.Body 3-D display and stereoscopic 3-D display all have reasonable display device at present and occur, yet the display device based on these two kinds of methods mostly relies on rotating screen to satisfy the requirement that full visual angle is watched, so display device structure relative complex cost is also relatively more expensive.

Using at present three-dimensional display apparatus with three-dimensional movie theatre exists the visual angle few and the visual angle is discontinuous, and need wear extra glasses and problem such as watch, and advantage of the present invention is to adopt front projection system structure three dimensional display, needing to can be used for the three-dimensional movie theatre of large scene, big picture 3-D view, but and bore hole watch.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, a kind of front projection self-stereoscopy three-dimensional display device and method based on the cylindrical grating screen is provided.

Front projection self-stereoscopy three-dimensional display device based on the cylindrical grating screen comprises the cylindrical grating screen of placing successively, vertical diffuser screen and projector, the cylinder of cylindrical grating screen is towards projector and be coated with reflectance coating, vertically diffuser screen is close to the placement of cylindrical grating screen, the 3-D view that projector's projection is combined by the perspective projection image at a plurality of visual angles of three-dimensional body is to the cylindrical grating screen, and the projected light beam that constitutes each perspective projection image is reflected to corresponding viewpoint respectively to form many viewpoints from stereoscopic 3-D display.

Described vertical diffuser screen is vertical diffuser screen of transmission-type.

The present invention adopts front projection system structure three dimensional display, needing can be used for the three-dimensional movie theatre of large scene, big picture 3-D view, but and bore hole watch.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is based on the front projection self-stereoscopy three-dimensional display device vertical view of cylindrical grating screen;

Fig. 2 is that projected image combination mode and many viewpoints generate synoptic diagram;

Fig. 3 is based on the front projection self-stereoscopy three-dimensional display device side view of cylindrical grating screen.

Embodiment

As shown in Figure 1, front projection self-stereoscopy three-dimensional display device based on the cylindrical grating screen comprises the cylindrical grating screen of placing successively 1,vertical diffuser screen 2 andprojector 3, the cylinder of cylindrical grating screen is towards projector and be coated with reflectance coating, vertically diffuser screen is close to the placement of cylindrical grating screen, the image of giving projector is that the perspective projection image by a plurality of visual angles of three-dimensional body combines, after the reflection of cylindrical grating screen, the light that each perspective projection image is reflected turns back to corresponding viewpoint respectively to form many viewpoints from stereoscopic 3-D display, front surface at the cylindrical grating screen adds vertical diffuser screen, then viewpoint is that observation point will no longer be confined near the point, but, that is to say and in the longitudinal region at this place, can see the pairing image of this viewpoint in vertical expansion.Traditional is to add cylindrical grating by flat-panel monitor to constitute from stereoscopic three-dimensional display device, the method of utilizing cylindrical grating to reflect beam split is adjusted the light emission direction of pixel on the flat-panel monitor, realize the perspective projection image of different visual angles is reverted to the purpose of corresponding viewpoint, the present invention is the light emission direction that utilizes the mechanism of cylindrical grating reflection beam splitting control pixel, adopt front projection system structure three dimensional display, needing to can be used for the three-dimensional movie theatre of large scene, big picture 3-D view, but and bore hole watch.

As shown in Figure 2, project to the image on the screen, several adjacent pixels form one group as a 3D pixel, and the pairing image of each viewpoint is made up of a pixel in all 3D pixels.Owing to the different pixels in the 3D pixel drops on the diverse location of cylindrical mirror in the cylindrical grating screen, so be reflected to different directions, just can observe the not image of ipsilateral of three-dimensional body in different points of view like this.

As shown in Figure 3, based on the vertical diffuser screen described in the front projection self-stereoscopy three-dimensional display device of cylindrical grating screen, it is vertical diffuser screen of transmission-type, vertically be scattered in horizontal no scattering, can be cylindrical grating or speckle hologram sheet, arrive the light on vertical diffuser screen surface direction is constant in the horizontal and directly pass it, then be scattered in the vertical and come.Front surface at the cylindrical grating screen adds vertical diffuser screen, and then viewpoint is that observation point will no longer be confined near the point, but in vertical expansion, that is to say and can see the pairing image of this viewpoint in the longitudinal region at this place.

Claims (2)

1. front projection self-stereoscopy three-dimensional display device based on cylindrical grating screen, it is characterized in that comprising the cylindrical grating screen of placing successively (1), vertical diffuser screen (2) and projector (3), the cylinder of cylindrical grating screen is towards projector and be coated with reflectance coating, vertically diffuser screen is close to the placement of cylindrical grating screen, the 3-D view that projector's projection is combined by the perspective projection image at a plurality of visual angles of three-dimensional body is to the cylindrical grating screen, and the projected light beam that constitutes each perspective projection image is reflected to corresponding viewpoint respectively to form many viewpoints from stereoscopic 3-D display.

2. the front projection self-stereoscopy three-dimensional display device based on the cylindrical grating screen according to claim 1 is characterized in that described vertical diffuser screen (2) is vertical diffuser screen of transmission-type.

Images