WO2016045470A1

WO2016045470A1 - Stereo projection system

Info

Publication number: WO2016045470A1
Application number: PCT/CN2015/087530
Authority: WO
Inventors: 郭祖强; 王则钦
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2014-09-28
Filing date: 2015-08-19
Publication date: 2016-03-31
Also published as: CN105527717B; CN105527717A

Abstract

A stereo projection system, comprising: a light source (501), for sequentially outputting a first mixed light and a second mixed light, each of the first mixed light and the second mixed light comprising at least two colored lights, a mixed light of the at least two colored lights comprising three primary lights; a light splitting and combining prism (502), provided in the light transmission path of the first mixed light and the second mixed light for splitting the first mixed light into first, second and third primary lights, and splitting the second mixed light into first, second and third primary lights; the first, second and third primary lights split from the first mixed light and the first, second and third primary lights split from the second mixed light are used for stereoscopic imaging. The present invention solves the problem of the high cost of performing stereo projection using a pure laser light source in the prior art, thus reducing the cost of the stereo projection system.

Description

Stereo projection system

Technical field

The present invention relates to the field of projection technology, and in particular to a stereoscopic projection system.

Background technique

At present, 3D display technology has been widely used in cinemas, home theaters and other places. 3D display technology can restore the height of the display content realistically. The basic principle is that the left and right eyes independently receive different images, and the brain is superimposed to form a three-dimensional image. display effect. In the current 3D display, the spectral separation technology has become an important technical means. The basic principle of the spectral separation technology is: the high-speed rotating RGB color separation wheel is placed inside the projector to provide different RGB color configurations for the left and right eyes, and RGB color separation. Glasses, let the left and right eyes see different pictures, thus forming a three-dimensional effect. Among them, RGB represents three primary colors: red, green, and blue.

The existing color difference type 3D is a kind of spectral separation technology, and the color filter glasses adopt a red/blue filter, that is, the left eye receives a red image, and the right eye receives a blue image, and vice versa. This technology is simple in structure and low in cost, but the 3D effect is poor. At this stage, a 3D technology of 3D display technology-6P (six primary color) laser light source is gradually developed. The light source is two sets of red, green and blue semiconductor lasers with wavelengths staggered, through different filters on the left and right eyes of the glasses. The left and right eyes each receive a set of three primary colors of red, green, and blue to form a 3D display. This method uses a pure laser as a light source, and has the advantages of good color and wide color gamut, but its cost is high, and the technique of dissipating the plaque is difficult. In addition, the 3D method described above alternately receives images in two eyes at different timings, and the rapid switching of the images makes the eyes susceptible to fatigue.

The spectral curve of a prior art spectral separation technique is shown in Figure 1. The smooth curve is the white light spectrum, the circled curve is the left eye spectrum, and the squared curve is the right eye spectrum. As can be seen from Figure 1, the white light spectrum The energy distribution is relatively uniform. In the case of the left eye spectrum and the right eye spectrum, the filter filters out at least half of the white light energy, and the left and right eye images have lower brightness and the overall light effect is not high.

Another spectral separation technique of the existing 6P laser source 3D technology is shown in Fig. 2. The solid line is the spectrum of the left-eye laser source, and the dotted line is the spectrum of the right-eye laser source. The left and right glasses filters are shown in Fig. 3. In Fig. 3, the thick curve is the left eye filter of the glasses, and the thin curve is the right eye filter of the glasses.

The above two spectral separation techniques, three digital micromirror devices (Digital Micromirror The timing of processing the primary color light on the Device (referred to as DMD) is as shown in FIG. 4: In FIG. 4, each of the DMDs processes a primary color light of the left and right eyes, and the left eye timing and the right eye timing are sequentially performed to form alternating left and right eyes. The image is superimposed by the human eye to form a 3D image.

The above two kinds of 3D display technologies obtain the left and right eye images by using the left and right eye red, green and blue primary color lights, and the left and right eye filters of the glasses, and form a stereoscopic display through superposition of the human eyes.

technical problem

The method of separating the three primary colors of the left and right eyes by the white light spectrum is not high in light efficiency, and the brightness of the left and right eye images is low.

Although the method of using a pure laser light source has high brightness and wide color gamut, the cost is too high, and the technique of dissipating the scatter is difficult.

A disadvantage common to the above two methods is that during the process of viewing images using glasses, the left and right eye images are frequently switched, making the eyes susceptible to fatigue.

In view of the high cost of stereoscopic projection using a pure laser light source in the prior art, an effective solution has not yet been proposed.

Technical solution

A main object of the present invention is to provide a stereoscopic projection system that solves the problem of high cost of stereoscopic projection using a pure laser light source in the prior art.

In order to achieve the above object, according to an aspect of an embodiment of the present invention, a stereoscopic projection system is provided. A stereoscopic projection system according to the present invention includes: a light source for sequentially outputting the first mixed light and the second mixed light, wherein the first mixed light and the second mixed light each include at least two colors of light, at least two colors The mixed light of light includes three primary colors of light; a splitting light combining prism disposed in the transmission optical path of the first mixed light and the second mixed light for dividing the first mixed light into the first primary light, the second primary light, and the first The three primary colors of light divide the second mixed light into the first primary color light, the second primary color light, and the third primary color light; wherein the first primary color light, the second primary color light, the third primary color light, and the first mixed light are separated The first primary color light, the second primary color light, and the third primary color light, which are separated by the two mixed lights, are primary color lights used for stereoscopic imaging.

Further, the stereoscopic projection system further includes: a light modulator, the first primary color light, the second primary color light, the third primary color light, and the first primary color light, which are separated by the first mixed light, and the first primary color light, In the transmission optical path of the two primary colors and the third primary colors, the first primary color light, the second primary color light, and the third primary color light for simultaneously modulating the first mixed light are simultaneously modulated, and the second mixed light is simultaneously modulated. a primary color light, a second primary color light, and a third primary color light; the splitting and combining prism is further configured to combine the first primary color light, the second primary color light, and the third primary color light that are separated by the modulated first mixed light, And combining the first primary color light, the second primary color light, and the third primary color light separated by the modulated second mixed light; wherein the first primary color light and the second primary color separated by the modulated first mixed light The first primary color light, the second primary color light, and the third primary color light separated by the light, the third primary color light, and the modulated second mixed light are used as the stereoscopic imaged primary color light.

Further, the first primary color light split by the first mixed light and the first primary color light separated by the second mixed light are the primary color difference primary light, and the first mixed light is separated by the second primary light and the second mixed light. The separated second primary color light is a metachromatic basic color light, and the third primary color light branched by the first mixed light and the third primary color light separated by the second mixed light are the metachromatic basic color light.

Further, the light combining and illuminating device comprises a first prism, a second prism and a third prism, an interface of the first prism and the second prism is provided with a first film layer, and an interface of the second prism and the third prism is provided with a second film a layer, wherein the first film layer sequentially separates the first primary color light of the first mixed light and the first primary color light of the second mixed light: the second film layer sequentially separates the first mixed light from the first The second primary color light of the mixed light and the third primary color light of the first mixed light, and the second primary color light of the second mixed light and the third primary color light of the second mixed light are separated from the second mixed light.

Further, the light modulator comprises a first primary color light modulator, a second primary color light modulator and a third primary color light modulator, wherein the first primary color light modulator is configured to sequentially modulate the first primary color of the first mixed light split a first primary color light split by the light and the second mixed light; a second primary color light modulator for sequentially modulating the second primary color light split by the first mixed light and the second primary color light separated by the second mixed light; The primary color modulator is configured to sequentially modulate the third primary color light split by the first mixed light and the third primary color light branched by the second mixed light.

Further, the light source includes: an excitation light source for emitting excitation light; and a color wheel disposed in the emission direction of the excitation light, the color wheel absorbing the excitation light, and sequentially outputting the first mixed light and the second mixed light.

Further, the excitation light is blue excitation light, and the color wheel includes a first segment and a second segment which are sequentially located in an emission direction of the excitation light, and the first segment absorbs the excitation light and outputs a first mixture including blue light and yellow light. The second segment absorbs the excitation light and outputs a second mixed light including cyan and red light.

Further, a yellow light wavelength conversion material is disposed on the first segment, and a mixture of the cyan wavelength conversion material and the red light wavelength conversion material is disposed on the second segment.

Further, the stereoscopic projection system further includes: a focusing lens disposed between the excitation light source and the color wheel for focusing the excitation light emitted by the excitation light source onto the color wheel; and collecting the lens disposed in the light output direction of the color wheel, a first mixed light and a second mixed light for collecting color wheel generation; a square rod disposed in a light output direction of the collecting lens for performing a light homogenizing process on the light collected by the collecting lens; and a relay lens disposed at the side a light output direction of the rod; a mirror disposed in the light output direction of the relay lens for reflecting the light output from the relay lens; and a TIR prism for totally reflecting the light reflected by the mirror to the plated photosynthetic unit On the light prism.

Further, the stereoscopic projection system further includes: a projection lens for separating the first primary color light, the second primary color light, the third primary color light, and the modulated second mixed light separated according to the modulated first mixed light a first primary color light, a second primary color light, and a third primary color light generating image; and stereoscopic glasses for forming a left eye image and a right eye image according to the image generated by the projection lens.

Further, the left lens of the glasses is plated with a first double band pass coating, and the first double band pass film is used for transmitting the first primary color light, the second primary color light, the third primary color light of the first mixed light, and the glasses. The right spectacle lens is plated with a second double band pass coating, and the second double band pass film is for transmitting the first primary color light, the second primary color light, and the third primary color light of the second mixed light.

Further, the left lens of the glasses is plated with a first three-pass coating, and the right lens of the glasses is plated with a second three-pass coating, wherein the band pass section of the first three-pass coating and the second three-pass coating The band pass intervals are staggered one after the other.

Further, the first three-band pass coating transmits the first primary color light split by the first mixed light and the third primary color light split by the first mixed light, and the second primary color light branched by the second mixed light; the second three The band pass coating transmits the second primary color light split by the first mixed light, and the first primary color light split by the second mixed light and the third primary color light branched by the second mixed light.

Further, the first three-band pass coating is for transmitting the blue light and the red light of the first mixed light, and the green light of the second mixed light; and the first three-band pass film is for transmitting the first mixed light The green light and the blue and red light separated by the second mixed light.

Further, the light source is an LED light source.

According to the embodiment of the present invention, by using the output timing complex color broad spectrum light as the light source, it is not necessary to use a laser for each of the primary color lights, thereby reducing the cost of the stereoscopic projection system, and the spectroscopic prisms are plated with the color separation film. The time-series light outputted by the light source is split to obtain the time-series primary color light, and the digital micro-mirror device is used to control the output timing of the split primary light, and is imaged by the projection lens. In this way, the problem of high cost of stereoscopic projection using a pure laser light source in the prior art is solved, and the effect of reducing the cost of the stereoscopic projection system is achieved.

DRAWINGS

The accompanying drawings, which are incorporated in the claims In the drawing:

Figure 1 is a graph of the separated spectrum according to the prior art;

2 is a spectral graph of separation of a pure laser light source according to the prior art;

3 is a lens filtering curve diagram according to the prior art;

4 is a timing diagram of processing a primary color light of a digital micromirror device according to the prior art;

FIG. 5 is a schematic structural diagram of a stereoscopic projection system according to a first embodiment of the present invention; FIG.

6 is a schematic structural view of a stereoscopic projection system according to a second embodiment of the present invention;

Figure 7 is a schematic view showing a color wheel of the stereoscopic projection system shown in Figure 6;

Figure 8 is a schematic diagram showing the wavelength of the color wheel output light of the stereoscopic projection system shown in Figure 6;

Figure 9 is a light timing diagram showing the color wheel output of the stereoscopic projection system shown in Figure 6;

Figure 10 is a timing chart showing left and right eyes of the stereoscopic projection system shown in Figure 6;

Figure 11 is a timing chart showing the light modulator processing of the stereoscopic projection system shown in Figure 6;

12 is a timing diagram of left and right eyes of another stereoscopic projection system according to an embodiment of the present invention;

13 is a timing diagram of light modulator processing of another stereoscopic projection system in accordance with an embodiment of the present invention.

Embodiments of the invention

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is an embodiment of the invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It will be understood that the data so used may be interchanged where appropriate to facilitate the embodiments of the invention described herein. Furthermore, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion. For example, a system, product, or device that includes a series of components is not necessarily limited to those components that are clearly listed. It may include other components not explicitly listed or inherent to such systems, products or devices.

Embodiments of the present invention provide a stereoscopic projection system.

Figure 5 is a block diagram showing the structure of a stereoscopic projection system in accordance with a first embodiment of the present invention. As shown in FIG. 5, the stereoscopic projection system includes a light source 501 and a beam splitting prism 502.

The light source 501 is for sequentially outputting the first mixed light and the second mixed light. Wherein, the first mixed light and the second mixed light respectively comprise at least two colors of light, and the mixed light of the at least two color lights comprises three primary colors of light, that is, at least two colors of light are synthesized from the three primary colors. The first mixed light may include at least two color lights simultaneously outputted in the first timing, and the at least two color lights include three primary color lights (red, green, and blue). For example, the first mixed light may be blue light + yellow light, and it is known that yellow light is light synthesized by red light and green light. Similarly, the second mixed light may include simultaneously outputting at least two colors of light in the second timing, for example, cyan + red light, and the like. The first mixed light may be primary color light for generating a left eye (or right eye) image, and the second mixed light may be primary color light for generating a right eye (or left eye) image. The first timing and the second timing are at different times.

The light source 501 may be a laser-excited phosphor as a light source or an LED light source.

The splitting light combining prism 502 is disposed in the transmission optical paths of the first mixed light and the second mixed light, and is configured to divide the first mixed light into the first primary light, the second primary light, and the third primary light, and the second mixed light The first primary color light, the second primary color light, and the third primary color light are divided, wherein the three primary colors separated by the first mixed light are respectively transmitted along different optical channels, and the three primary colors separated by the second mixed light are respectively In the different optical channels, the three primary colors separated by the first mixed light and the primary colored lights of the three primary colors separated by the second mixed light are transmitted along the same optical channel. That is, the first primary color light split by the first mixed light and the first primary color light separated by the second mixed light are transmitted along the same transmission channel, and the second primary color light and the third primary color light are similar.

The first primary color light, the second primary color light, the third primary color light, and the second primary light separated by the first mixed light, the first primary color light, the second primary color light, and the third primary color light are used as a primary color for stereo imaging Light.

After the first mixed light and the second mixed light pass through the splitting and combining prism 502, they are divided into three primary colors (blue light, green light, and red light), wherein the blue light is split along the first primary color optical channel, and the green light is along the first The two primary color optical channels are transmitted, and the red light is transmitted along the third primary color optical channel.

The splitting light combining prism 502 may include a plurality of prisms, which may be a Philips prism, on which the color separation film is plated, and the first mixed light and the second mixed light are split by the color separation color combining film to obtain the first mixed light. The first primary color light, the second primary color light, the third primary color light, and the second primary light separated by the first primary color light, the second primary color light, and the third primary color light.

After the first mixed light and the second mixed light pass through the spectral combining prism 502, they are all decomposed into three primary colors. Specifically, the beam splitting prism 502 may include three prisms, and a color separation film is plated between two adjacent prisms, and the first mixed light and the second mixed light sequentially pass through three prisms, and pass through the color separation film. The basket light, the red light, and the green light are sequentially decomposed from the first mixed light and the second mixed light.

Further, the first primary color light split by the first mixed light and the first primary color light separated by the second mixed light are the primary color difference primary light, and the first mixed light is separated by the second primary light and the second mixed light. The separated second primary color light is a metachromatic basic color light, and the third primary color light branched by the first mixed light and the third primary color light separated by the second mixed light are the metachromatic basic color light. Among them, metamerism means that the visual colors are the same but the spectral reflection curves are different. Accordingly, the two kinds of light of the same color are the two kinds of light that have the same visual color but different spectral reflection curves.

According to the embodiment of the present invention, by using the output timing complex color broad spectrum light as the light source, it is not necessary to use a laser for each of the primary color lights, thereby reducing the cost of the stereoscopic projection system, and the mixed light outputted to the light source by the splitting and combining prism. The splitting is performed to obtain the primary color light, and the split primary light is modulated by the light modulator, and then the projection lens can be imaged, and the 3D imaging is performed with the glasses to realize the 3D effect. In this way, the problem of high cost of performing 3D projection by using a pure laser light source in the prior art is solved, and the effect of reducing the cost of the stereoscopic projection system is achieved.

Preferably, the stereoscopic projection system of the embodiment of the present invention further includes: a light modulator 503, wherein the light modulator 503 is disposed at a first primary color light, a second primary color light, a third primary color light, and a second divided by the first mixed light. a first primary color light, a second primary color light, and a third primary color light for simultaneously modulating the first mixed light splitting in the transmission optical path of the first primary color light, the second primary color light, and the third primary color light separated by the mixed light; At the same time, the first primary color light, the second primary color light, and the third primary color light separated by the second mixed light are modulated.

The first primary color light, the second primary color light, and the third primary color of the first primary color light, the second primary color light, the third primary color light, and the second mixed light separated by the modulated first mixed light by the light modulator 503 The light is reflected to the splitting and combining prism 502, and the splitting and combining prism 502 is further configured to combine the first primary color light, the second primary color light, and the third primary color light that are separated by the modulated first mixed light, and after combining The first primary color light, the second primary color light, and the third primary color light separated by the second mixed light are combined, wherein the first primary color light, the second primary color light, and the third first mixed light are modulated The first primary color light, the second primary color light, and the third primary color light, which are separated by the primary color light and the modulated second mixed light, are used as the primary color light for stereoscopic imaging.

After passing through the spectral combining prism 502, the first mixed light and the second mixed light are respectively decomposed into first primary color light, second primary color light, third primary color light, and second mixed light separated by the first mixed light. The first primary color light, the second primary color light, and the third primary color light, the light modulator 503 is disposed in the transmission optical path of the split light, respectively receiving the first primary color light and the second primary color light separated by the first mixed light The first primary color light, the second primary color light, and the third primary color light separated by the three primary color lights and the second mixed light. After receiving these primary colors of light, the light modulator 503 performs image modulation on the received primary color light. The three primary colors separated by the modulated first mixed light and the three primary colors separated by the second mixed light are then reflected to the splitting and combining prism 502, and the combined light output is performed by the splitting and combining prism. The combined light can be imaged through a projection lens and 3D imaged with glasses to achieve 3D display.

Specifically, the primary color light output by the light modulator 503 is further subjected to a spectroscopic light combining prism 502 plated with a color separation and color combining film, and the output primary color is combined by a color separation color film to be imaged by the projection lens 504, and the human eye wears the pair of glasses 505. The left and right eye images are superimposed to form a 3D effect. Light modulator 503 can be a digital micromirror device.

Figure 6 is a block diagram showing the structure of a stereoscopic projection system in accordance with a second embodiment of the present invention. The stereoscopic projection system of this embodiment can be used as a preferred embodiment of the stereoscopic projection system of the above embodiment.

As shown in FIG. 6, in the embodiment of the present invention, the light source 501 shown in FIG. 5 includes an excitation light source 601 and a color wheel 603 for emitting excitation light. The color wheel 603 is disposed in the emission direction of the excitation light, and the color wheel 603 absorbs the excitation light and sequentially outputs the first mixed light and the second mixed light.

The color wheel 603 may be one or more. When a color wheel is used, the color wheel 603 is divided into two segments, the first segment is coated with a first phosphor, and the second segment is coated with a second phosphor. The wheel 603 is rotated by the driving device, and the excitation light sequentially excites the first phosphor and the second phosphor with the rotation of the color wheel, wherein the first phosphor is excited to obtain the first mixed light, and the second phosphor is excited to obtain the second phosphor. Mix light.

Specifically, the color wheel 603 includes a first segment and a second segment which are sequentially located in the emission direction of the excitation light, the first segment absorbs the excitation light and outputs a first mixed light including blue light and yellow light, and the second segment The excitation light is absorbed and a second mixed light including cyan and red light is output.

Preferably, the first segment is provided with a yellow wavelength converting material, and the second segment is provided with a mixture of a cyan wavelength converting material and a red wavelength converting material.

Further, the excitation light source 601 may be a blue semiconductor laser for outputting blue excitation light, and the excitation light source 601 exciting the color wheel 603 to generate two sequential light. As shown in FIG. 7, the first stage of the color wheel 603 is coated with a yellow phosphor, and the second stage is coated with a mixture of a cyan phosphor and a red phosphor. The excitation light emitted by the excitation source is blue excitation light, and the color wheel 603 is for causing the yellow phosphor to generate the first mixed light under the excitation of the blue excitation light, and causing the mixture of the cyan phosphor and the red phosphor to generate the second mixed light under the excitation of the blue excitation light. The first mixed light includes blue light and yellow light, and the second mixed light includes cyan light and red light. In the first segment, the blue excitation light partially excites the yellow phosphor to obtain yellow light, and the other portion is not excited and still blue. The colored light obtains two mixed lights of the first timing. On the second stage, the blue excitation light is completely used to excite the mixture of the cyan phosphor and the red phosphor to generate cyan light and red light of the second timing. As shown in FIG. 8, the light of the two bands in the first sequence is blue light + yellow light in turn, and the light of the two bands in the second time sequence is cyan + red light.

According to the embodiment of the present invention, by using the laser-excited timing complex color broad spectrum light, the three primary colors of light required by the left and right eyes are obtained, thereby realizing a 3D effect, which is not only wide in color gamut but also low in cost.

Preferably, as shown in FIG. 6, the beam splitting prism 609 includes: a first prism, a second prism, and a third prism, a first color separation film and a second film layer, and a first prism and a second prism. The interface is provided with a first film layer, and the interface between the second prism and the third prism is provided with a second film layer, wherein the first film layer sequentially separates the first primary color light and the second mixture in the first mixed light a first primary color light in the light, and sequentially directing the first primary color light split by the first mixed light and the first primary color light separated by the second mixed light to the same light modulator: the second film layer sequentially Dividing a second primary color light of the first mixed light and a third primary color light of the first mixed light into a mixed light, and separating the second primary color light and the second mixture of the second mixed light from the second mixed light a third primary color light in the light, and sequentially guiding the second primary color light of the first mixed light and the second primary color light of the second mixed light to the same light modulator, sequentially separating the first mixed light The third primary color light and the third primary color light separated by the second mixed light are directed to the same light modulator.

Specifically, the first prism, the second prism, and the third prism may be sequentially arranged, and the first mixed light and the second mixed light sequentially pass through the first prism, the second prism, and the third prism, wherein one side and the second side of the first prism One side of the prism is attached, and a first film layer 613 is plated between the first prism and the second prism, and the first film layer 613 is configured to reflect blue light in the first mixed light and the second mixed light, and transmits the first mixed light and Green light and red light in the second mixed light; the other side of the second prism is attached to one side of the third prism, and the second film layer 614 is plated between the second prism and the third prism, and the second film layer is used for reflection The red light transmitted by a film layer 614 transmits the green light transmitted by the first film layer.

The beam splitting prism 609 of this embodiment can be used as a preferred embodiment of the beam splitting prism 502 shown in FIG.

The color separation color matching prism 609 includes three prisms. As shown in FIG. 8, the first film layer 613 reflects blue light and transmits green light and red light. The blue light includes a first time sequence of blue light B1 and a second time sequence of blue light B2, and a second film. The layer 614 reflects red light and transmits green light. The red light includes a red light R1 of a first timing and a red light R2 of a second timing, and the green light includes a green light G1 of a first timing and a green light G2 of a second timing. The spectra in the two time series after the splitting are shown in Fig. 9.

According to an embodiment of the present invention, a wide-spectrum light is split by a spectroscopic light-collecting prism plated with a color separation color film, and the split light is modulated by a light modulator, and then passed through a split-light combining prism plated with a color separation film. The combined light output is imaged by the projection lens, and the 3D display is realized with the filter glasses, and the structure is simple.

In this embodiment, the optomechanical structure of the conventional three-piece DMD projection system is adopted, especially on the basis of not changing the prism structure and the coating film, by replacing the light source with the laser-excited time-series complex color wide-spectrum light, thereby obtaining the needs of the left and right eyes. The three primary colors of light, in order to achieve 3D effects. It should be noted that the broad spectrum light described herein may refer to light containing a plurality of discontinuous wavelength bands.

Specifically, the light modulator 503 shown in FIG. 5 may include a first primary color light modulator 610, a second primary color light modulator 611, and a third primary color light modulator 612, wherein the first primary color light modulator 610 is used for Receiving the blue light reflected by the first film layer 613 and modulating the reflected blue light; the second primary color light modulator 611 is configured to receive the red light reflected by the second film layer 614 and reflect the red light. Modulation is performed; the third primary color light modulator 612 is configured to receive the red light transmitted by the second film layer 614 and modulate the transmitted red light.

When the optical modulator employs a digital micromirror device, the first primary color light modulator 610, the second primary color light modulator 611, and the third primary color light modulator 612 are sequentially DMD 610, DMD 611, and DMD 612. The three prisms are placed with DMD610, DMD611, and DMD612, and the three prisms are respectively plated with a color separation film, that is, a first film layer 613 and a second film layer 614. As shown in FIG. 8, the first film layer 613 reflects blue light. The green light and the red light are transmitted, and the second film layer 614 reflects the red light and transmits the green light. The spectrum in the two time series after the splitting is shown in Fig. 9. In combination with the left and right eyeglass coating curves, as shown in Fig. 10, the timing of processing light on DMD610, DMD611, and DMD612 is as shown in Fig. 11, wherein the gray portion represents the left. The eye base color light, the white part represents the right eye base color light, and the left and right eye base color lights are sequentially modulated by the DMD, and are imaged by the projection lens 615, and the human eye wears the glasses 616 to superimpose the left and right eye images to finally form a 3D effect.

Further, as shown in FIG. 6, the stereoscopic projection system further includes a focusing lens 602, a collecting lens 604, a square bar 605, a relay lens 606, a mirror 607, and a TIR prism 608. The focusing lens 602 is disposed on the excitation light source and the color wheel. Between the blue excitation light emitted by the excitation light source 601 is focused on the color wheel 603; the collection lens 604 is disposed in the light output direction of the color wheel 603 for collecting the first mixed light generated by the color wheel 603 and the first Two mixed lights; a square bar 605 is disposed in the light output direction of the collecting lens 604 for performing a homogenizing process on the collecting lens collection 604; the relay lens 606 is disposed in the light output direction of the square bar 605; the mirror 607 The light output direction of the relay lens 606 is used to reflect the light output from the relay lens 606; the TIR prism 608 is used to totally reflect the light reflected by the mirror 607 onto the plated light combining prism 609.

The light output from the color wheel 603 enters the square bar 605 through the collecting lens 604, is homogenized, passes through the relay lens 606, and the mirror 607 reaches the TIR prism 608. The TIR prism 608 totally reflects it and enters the beam splitting prism 609.

Further, the stereoscopic projection system further includes: a projection lens and stereo glasses. The projection lens is configured to receive three primary color lights separated by the first mixed light outputted by the splitting light combining prism and three primary color lights separated by the second mixed light, and are separated according to the modulated first mixed light. a first primary color light, a second primary color light, a third primary color light, and a second primary color light, a second primary color light, and a third primary color light generation image; the stereoscopic glasses are used to generate according to a projection lens The image is the left eye image and the right eye image.

Further, the left lens of the glasses is plated with a first double band pass coating, and the first double band pass film is used for transmitting the first primary color light, the second primary color light, the third primary color light of the first mixed light, and the glasses. The right spectacle lens is plated with a second double band pass coating, and the second double band pass film is for transmitting the first primary color light, the second primary color light, and the third primary color light of the second mixed light. The spectrum of the glasses transmitted to the human eye is shown in Fig. 9. In this way, the transmission spectrum of the filter glasses is consistent with the spectrum of the left and right eye sources projected by the projection lens.

The left and right eye lens coating film of the embodiment of the invention is a double bandpass mode, which is consistent with the spectrum of the left and right eye light sources, and the light effect of the light source is maintained to the greatest extent, the brightness of the 3D projection is improved, and the difficulty of coating the glasses is also reduced. In terms of a light source, the embodiment is not limited to a laser-excited phosphor as a light source, and may be an LED light source.

Optionally, the left lens of the glasses is plated with a first three-pass coating, and the right lens of the glasses is plated with a second three-pass coating, wherein the band pass interval of the first three-pass coating and the second three-pass The band pass intervals of the coating are sequentially shifted.

The first three-band pass coating is used to transmit three different primary colors, and there is no different primary light in the continuous band. The second three-pass coating is used to transmit three different primary colors, and there are no different primary colors in the continuous band. Light, wherein the first three-band pass coating and the second three-band pass coating transmit different wavelengths of the same primary color light.

Further, the first three-band pass coating transmits the first primary color light split by the first mixed light and the third primary color light split by the first mixed light, and the second primary color light branched by the second mixed light; the second three The band pass coating transmits the second primary color light split by the first mixed light, and the first primary color light split by the second mixed light and the third primary color light of the second timing.

Specifically, the first three-band pass coating is for transmitting the blue light B1 and the red light R1 of the three primary colors of the first mixed light, and the green light G2 of the three primary colors of the second mixed light; The first three-band pass coating is for transmitting the blue light B2 and the red light R2 among the three primary colors of the second mixed light, and the green light G1 among the three primary colors of the first mixed light.

The coating curve of the left and right eye glasses is changed to the curve shown in FIG. 12, and the original double-pass coating is changed into a three-pass coating, and the left-eye glasses coating band pass interval and the right eye glasses coating interval are sequentially shifted, so that DMD610, DMD611 The timing of processing the primary color light by DMD612 is shown in Fig. 13. The gray part represents the left eye primary color light, and the white part represents the right eye primary color light. This method is used to make both the left eye primary color and the right eye primary color in each time sequence. Light, so as to ensure that the light intensity received by each eye is slowed down, reducing the degree of eye fatigue.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A stereoscopic projection system, comprising:

a light source for sequentially outputting the first mixed light and the second mixed light, wherein the first mixed light and the second mixed light each include at least two color lights, and the mixed light of the at least two color lights includes Three primary colors of light;

a light combining prism disposed in the transmission optical paths of the first mixed light and the second mixed light for dividing the first mixed light into the first primary color light, the second primary color light, and the third primary color light The second mixed light is divided into a first primary color light, a second primary color light, and a third primary color light;

The first primary color light, the second primary color light, the third primary color light, and the first primary color light, the second primary color light, and the third primary color light separated by the first mixed light are Used as a primary color for stereo imaging.
The stereoscopic projection system according to claim 1, wherein the stereoscopic projection system further comprises:

a light modulator, a first primary color light, a second primary color light, a third primary color light, and a first primary color light and a second primary color light, which are separated by the first mixed light a first primary color light, a second primary color light, and a third primary color light that are simultaneously modulated by the first mixed light, and simultaneously modulate the first mixed light of the first mixed light, in the transmission optical path of the three primary colors of light Primary color light, second primary color light, third primary color light;

The spectroscopic light combining prism is further configured to combine the first primary color light, the second primary color light, and the third primary color light that are separated by the modulated first mixed light, and combine the modulated second mixture The first primary color light, the second primary color light, and the third primary color light separated by light are combined;

The first primary color light, the second primary color light, the third primary color light, and the second primary color light and the second primary color light that are separated by the modulated second mixed light after the modulated first mixed light is modulated. The third primary color light is used as the primary color light for stereoscopic imaging.
The stereoscopic projection system according to claim 2, wherein the first primary color light split by the first mixed light and the first primary color light separated by the second mixed light are metachromatic different primary light, The second primary color light split by the first mixed light and the second primary color light separated by the second mixed light are a metachromatic basic color light, and the third primary color light and the first mixed light are separated The third primary color light separated by the second mixed light is a metachromatic basic color light.
The stereoscopic projection system according to claim 3, wherein the spectroscopic light combining device comprises a first prism, a second prism and a third prism, and an interface between the first prism and the second prism is provided with a film layer, a second film layer is disposed at an interface between the second prism and the third prism,

Wherein, the first film layer sequentially separates the first primary color light of the first mixed light and the first primary color light of the second mixed light:

The second film layer sequentially separates the second primary color light of the first mixed light and the third primary color light of the first mixed light from the first mixed light, from the second mixing The second primary color light of the second mixed light and the third primary color light of the second mixed light are separated from the light.
The stereoscopic projection system according to claim 4, wherein said light modulator comprises a first primary color light modulator, a second primary color light modulator, and a third primary color light modulator,

The first primary color light modulator is configured to sequentially modulate the first primary color light split by the first mixed light and the first primary color light separated by the second mixed light;

The second primary color light modulator is configured to sequentially modulate the second primary color light split by the first mixed light and the second primary color light separated by the second mixed light;

The third primary color modulator is configured to sequentially modulate the third primary color light split by the first mixed light and the third primary color light branched by the second mixed light.
The stereoscopic projection system according to any one of claims 1 to 5, wherein the light source comprises:

An excitation light source for emitting excitation light; and a color wheel disposed in an emission direction of the excitation light, the color wheel absorbing the excitation light, and sequentially outputting the first mixed light and the second mixture Light.
The stereoscopic projection system according to claim 6, wherein the excitation light is blue excitation light,

The color wheel includes a first segment and a second segment sequentially located in an emission direction of the excitation light, the first segment absorbing the excitation light and outputting a first mixed light including blue light and yellow light, The second stage absorbs the excitation light and outputs a second mixed light including cyan and red light.
The stereoscopic projection system according to claim 7, wherein the first segment is provided with a yellow wavelength conversion material, and the second segment is provided with a cyan wavelength conversion material and a red wavelength. A mixture of conversion materials.
The stereoscopic projection system according to claim 6, wherein the stereoscopic projection system further comprises:

a focusing lens disposed between the excitation light source and the color wheel for focusing the excitation light emitted by the excitation light source onto the color wheel;

Collecting a lens disposed in a light output direction of the color wheel for collecting the first mixed light and the second mixed light generated by the color wheel;

a square rod disposed in a light output direction of the collecting lens for performing a light homogenizing process on the light collected by the collecting lens;

a relay lens disposed in a light output direction of the square bar;

a mirror disposed in a light output direction of the relay lens for reflecting light output by the relay lens;

a TIR prism for totally reflecting the light reflected by the mirror onto the plated light combining prism.
The stereoscopic projection system according to any one of claims 2 to 5, wherein the stereoscopic projection system further comprises:

a projection lens for splitting the first primary color light, the second primary color light, the third primary color light, and the modulated first mixed light of the second mixed light according to the modulated first mixed light, Second primary color light, third primary color light generating image;

Stereo glasses for forming a left eye image and a right eye image according to the image generated by the projection lens.
The stereoscopic projection system according to any one of claims 2 to 5, wherein the stereoscopic projection system further comprises:

a projection lens for splitting the first primary color light, the second primary color light, the third primary color light, and the modulated first mixed light of the second mixed light according to the modulated first mixed light, Second primary color light, third primary color light generating image;

Stereo glasses for forming a left eye image and a right eye image according to the image generated by the projection lens.
The stereoscopic projection system according to claim 11, wherein the left lens of the glasses is plated with a first three-pass coating, and the right lens of the glasses is plated with a second three-pass coating, wherein The band pass section of the first three-pass pass coating and the band pass section of the second three-pass pass film are sequentially shifted.
The stereoscopic projection system according to claim 12, wherein said first three-band pass coating transmits said first primary light split by said first mixed light and said third primary color of said first mixed light Light, and second primary color light split by the second mixed light; the second three-pass coating transmits the second primary light that is split by the first mixed light, and the first of the second mixed light The primary color light and the third primary color light split by the second mixed light.
A stereoscopic projection system according to claim 13 wherein:

The first three-pass pass coating is for transmitting blue light and red light that are separated by the first mixed light, and green light that is separated by the second mixed light;

The first three-pass pass coating is for transmitting green light that is separated by the first mixed light, and blue and red light that is separated by the second mixed light.
The stereoscopic projection system of claim 1 wherein said light source is an LED light source.