CN102364379B - Naked eye stereoscopic display method based on liquid crystal light valve curtain device - Google Patents

Abstract

The invention discloses a naked-eye three-dimensional display method based on a liquid crystal light valve curtain device. A high-frequency image source is used to output high-frequency left and right eye parallax images (usually not lower than 120HZ), and the image light is sequentially output in parallel light mode. The light-splitting elements form a comb-like distribution, and the comb-like distributed images form a virtual image through the lens group, and then through the cooperation of the liquid crystal light valve A and the liquid crystal light valve B with polarizers, the left and right eye images are separated to form a three-dimensional display to reduce crosstalk.

Description

A naked-eye three-dimensional display method based on a liquid crystal light valve curtain device

technical field

The invention relates to the field of stereoscopic display methods, in particular to a naked-eye stereoscopic display method based on a liquid crystal light valve curtain device.

Background technique

Several parallax-based naked-eye stereoscopic display methods in the prior art mainly include parallax barrier (front, rear) and lenticular methods. The parallax barrier stereoscopic display technology uses a series of light-shielding stripes arranged in the vertical direction between the backlight module and the LCD panel to form a parallax barrier, which separates the images of the left eye and the right eye, so that 3D images can be obtained, and some programs install the parallax barrier in the LCD front. At present, the parallax barrier is generally realized by liquid crystal, which can control the switch of the parallax barrier, display 2D images when there is no parallax barrier, and display 3D images when there is a parallax barrier. The disadvantage of this technology is that the parallax barrier blocks light, and the brightness of the display screen will decrease accordingly; in addition, the resolution of the display screen will drop by half when viewing stereoscopic images (dual view point), and the resolution of the multi-view point display screen will be proportionally reduced.

The lenticular lens stereoscopic display technology was first proposed by Sanyo, and later Philips put a lot of effort into research. This technology adds a layer of micro-cylindrical lens film on the LCD panel, and the lenticular lens is precisely aligned with a group of pixels of the LCD screen. Each pixel is located on the focal plane of the lenticular lens, so that different pixels are projected to different directions by the lens. The display of the pixels of the display screen can separate the visual images for the left and right eyes and send them to the left and right eyes respectively to realize 3D display. In the Philips solution, the lenticular lens is also filled with liquid crystals, which can control the refractive index of the lens, and realize 3D display when light is refracted, and 2D display when light is not refracted. Lenticular lens technology will not block the backlight, and the brightness of the display will not be affected, but because it also projects different pixels to the left and right eyes separately, which is the same as the parallax barrier technology, so the resolution will still be reduced during 3D display. rate will be doubled.

Contents of the invention

The object of the present invention is to provide a naked-eye three-dimensional display method based on a liquid crystal light valve curtain device, so as to solve the problem that the resolution of the existing naked-eye three-dimensional display method is easy to decrease.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A naked-eye three-dimensional display method based on a liquid crystal light valve curtain device. The three-dimensional display device includes a high-frequency image source, and a light splitting element, a lens group, a liquid crystal light valve A, and a polarizer are sequentially arranged in front of the high-frequency image source light path. The liquid crystal light valve B and the reflecting mirror are characterized in that: the high-frequency image source is modulated so that the high-frequency image source outputs high-frequency left and right eye images with parallax to the light splitting element respectively, and the left and right eye images are made by modulating the high-frequency image source. . The light of the right-eye image is sequentially output in a parallel light manner, and the light splitting element modulates the output light of the left and right eye images into a comb-shaped distribution, and the comb-shaped output light of the left and right eye images passes through the lens group to form a virtual image respectively; For the virtual image corresponding to the left-eye image, both the liquid crystal light valve A and the liquid crystal light valve B work in the reflective state, most of the light in the left-eye image is reflected by the liquid crystal light valve A to the left eye of the person, and a small part of the light in the left-eye image passes through After the liquid crystal light valve A is incident to the liquid crystal light valve B, after being reflected by the liquid crystal light valve B and being changed by the polarizer by 90 degrees, it cannot pass through the liquid crystal light valve A again to reach the right eye of the person; for the virtual image corresponding to the right eye image , so that both liquid crystal light valve A and liquid crystal light valve B work in the transmission state, and the image light of the right eye transmits through liquid crystal light valve A and the single-layer liquid crystal in turn, and is reflected by the mirror to the right eye of the human body; by switching liquid crystal light valve A and The working state of the single-layer liquid crystal realizes the separation of the left and right eye images, and then realizes the stereoscopic display of the images.

A naked-eye three-dimensional display method based on a liquid crystal light valve curtain device is characterized in that: in the three-dimensional display device, the high-frequency image source and the light-splitting element are all located within the focus range of the lens group, and the plane where the liquid crystal light valve A is located and the light-splitter The components are at a certain angle; the plane where the liquid crystal light valve B is located and the plane where the reflector is located are respectively at a certain angle with the liquid crystal light valve A, and the reflector is located at the rear side of the liquid crystal light valve B and is close to the liquid crystal light valve B.

A naked-eye three-dimensional display method based on a liquid crystal light valve curtain device is characterized in that: the comb-shaped distribution of left and right eye images formed by the light splitting element is respectively periodically and uniformly distributed in space, and adjacent sub- The image source spacing is equal to the sub-image source width.

The naked-eye three-dimensional display method based on a liquid crystal light valve curtain device is characterized in that: the respective sub-image sources in the comb-shaped distribution of left and right eye images are respectively located in the focal length of the lens group, so that the left and right eye images of the comb-shaped distribution 1. The image of the right eye passes through the lens group to form a magnified upright virtual image.

A naked-eye three-dimensional display method based on a liquid crystal light valve curtain device is characterized in that: if the image source outputs an image for the left eye, most of the image light is reflected by the liquid crystal light valve A and enters the left eye of the person, and the transmitted light cannot Enter the right eye; if the image source output is the right eye image, most of the light is reflected by the mirror and enters the right eye of the person; while the left eye and right eye images are comb-shaped images, the mirror and the lens group are at a certain angle , so the image reflected to the right eye has a relative displacement relative to the image for the left eye, which can separate the left and right eyes and avoid crosstalk.

The three-dimensional display method of the present invention adopts virtual image imaging technology, and the virtual image is an image formed by converging reflected extension lines of light, which can be directly observed with human eyes without using a display screen. Suitable for stereo display. Therefore, the display method of the present invention avoids the problem of weak stereoscopic effect and depth perception of other stereoscopic display methods based on the parallax method, and also avoids the problem that the resolution of other stereoscopic display methods based on the parallax method is easily reduced, and has strong stereoscopic effect and high depth. The advantages of feeling.

Description of drawings

Figure 1 is a schematic diagram of the optical path of the present invention.

Detailed ways

As shown in Figure 1. The three-dimensional display device based on the liquid crystal light valve curtain is composed of a high-frequency image source 1, a light splitting element 2, a lens group 3, a liquid crystal light valve A4, a liquid crystal light valve B5 with a polarizer attached, and a reflector 6. The high-frequency image source 1 and the light-splitting element 2 are all located within one focal length of the lens group 4, and the plane where the liquid crystal light valve A4 is located forms a certain angle with the two light-splitting elements; the liquid crystal light valve B5 and the reflector 6 form a certain angle with the liquid crystal light valve A4 Arranged at an angle, the reflector 6 is located at the rear side of the liquid crystal light valve B5 and placed close to the liquid crystal light valve B5.

In the method of the present invention. High-frequency image source 1 outputs high-frequency parallax images of left and right eyes (usually not lower than 120HZ), and the image light is sequentially output in the form of parallel light, and passes through the light splitting element 2 to form a comb-like distribution (spatial periodic and uniform distribution, and adjacent sub-elements The image source spacing is equal to the sub-image source width), and the comb-like distributed images form a virtual image through the lens group 3, and then the virtual image is sent through the liquid crystal light valve A4 (which can work in the transmission and reflection state) and the liquid crystal light valve B5 with a polarizer attached to it. Into the left and right eyes of people, there is a certain angle between the liquid crystal light valve B5 and the previous liquid crystal light valve A4. By adjusting the angle between the liquid crystal light valve A4 and the liquid crystal light valve B5, the left and right eye images can be separated to form a three-dimensional show.

When the high-frequency image source 1 displays the left-eye image, voltage is applied to both the liquid crystal light valve A4 and the liquid crystal light valve B5, and the left-eye image is modulated by the light-splitting element 2 to form a spatial interval distribution, and the spacing is equal to the size of each sub-image source . The light emitted by the sub-image source is incident on the liquid crystal light valve A4 through the lens group 3. At this time, the liquid crystal light valve A4 is in a highly reflective state, and most of the light is reflected to the left eye of the observer, and the transmitted light passes through the polarizing film. The reflected polarization state of the liquid crystal light valve B5 changes 90 degrees, and cannot pass through the liquid crystal light valve B5 to reach the right eye again. Since the sub-image source of the spatial distribution is located within one focal length of the lens group 3, the left eye will see the magnified The erect image (virtual image) of . Similarly, when the high-frequency image source 1 displays the right-eye image, no voltage is applied to the liquid crystal light valve A4 and liquid crystal light valve B5 (transmissive state). Most of the light passes through the liquid crystal light valve A4 and the liquid crystal light valve B5, and is reflected by the reflector 6 into the observer's right eye. The high-frequency image source 1 alternately displays the parallax images of the left and right eyes at high frequency. Using the visual residual mechanism of the human eye, the left and right eyes see their respective images, and after the fusion of the brain, a three-dimensional effect is produced.

When the high-frequency image source 1 outputs the left-eye image, most of the image light is reflected by the liquid crystal light valve A and enters the left eye of the person, and the transmitted light cannot enter the right eye; if the image is a right-eye image, most of the light is transmitted by the reflector The reflection enters the right eye of the person; while the images of the left eye and the right eye are comb-shaped images, and the mirror and the lens group are at a certain angle, so the image reflected to the right eye has a relative displacement relative to the image of the left eye, which can be Realize the separation of left and right eyes and avoid crosstalk.

Claims (4)

1. bore hole stereo display method based on the liquid crystal light valve proscenia, described 3 d display device comprises a high frequency image source, high frequency image source light path the place ahead is disposed with beam splitter, lens combination, liquid crystal light valve A, post the liquid crystal light valve B of polaroid, catoptron, it is characterized in that: modulation high frequency image source, make the high frequency image source export the left side with parallax of high frequency respectively to beam splitter, eye image, and make a left side by modulation high frequency image source, the light of eye image is with the staggered output of directional light mode sequential, beam splitter is with a left side, the output optical modulation of eye image becomes pectination to distribute, the left side that pectination distributes, eye image output light forms the virtual image respectively through after the lens combination; The virtual image for the left-eye image correspondence, make liquid crystal light valve A and liquid crystal light valve B all work in reflective condition, the most of light of left-eye image is reflexed to people's left eye by liquid crystal light valve A, left-eye image fraction light is incident to liquid crystal light valve B after seeing through liquid crystal light valve A, after liquid crystal light valve B reflection and being polarized sheet change 90 degree polarization states, can't see through liquid crystal light valve A again to intelligent's right eye; For the virtual image of eye image correspondence, make liquid crystal light valve A and liquid crystal light valve B all work in transmissive state, eye image light is after liquid crystal light valve A and individual layer liquid crystal are crossed in transmission successively, and the mirror reflection that is reflected is to the human body right eye; Duty by switchable liquid crystal light valve A and individual layer liquid crystal realizes the right and left eyes separation of images, and then realizes the stereo display of image; The left-and right-eye images that the described pectination that forms through beam splitter distributes be respectively periodically even the distribution in the space, and adjacent sub-image source spacing equates with sub-image source width.

2. a kind of bore hole stereo display method based on the liquid crystal light valve proscenia according to claim 1, it is characterized in that: in the 3 d display device, high frequency image source, beam splitter all are positioned in the focus of lens combination, and plane, liquid crystal light valve A place and beam splitter are at an angle; Plane, liquid crystal light valve B place, plane, catoptron place respectively with liquid crystal light valve A at an angle, catoptron is positioned at liquid crystal light valve B rear side and is close to liquid crystal light valve B.

3. a kind of bore hole stereo display method based on the liquid crystal light valve proscenia according to claim 1, it is characterized in that: separately sub-image source lays respectively in the lens combination focal length in the left-and right-eye images that pectination distributes, thereby makes left-and right-eye images that pectination distributes through forming the upright virtual image of amplifying after the lens combination.

4. a kind of bore hole stereo display method based on the liquid crystal light valve proscenia according to claim 1, it is characterized in that: if image source output left-eye image, most of image light enters people's left eye by liquid crystal light valve A reflection, and the light that sees through can't enter right eye; If image source output eye image, most of light is entered people's right eye by mirror reflects; And left eye and eye image all are the image that pectination distributes, and catoptron and lens combination etc. is certain angle, with respect to left-eye image one relative displacement is arranged so reflex to the image of right eye, can realize that right and left eyes separates, and avoids crosstalking.

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