CN205121096U

CN205121096U - Single box of liquid crystal light valve and three -dimensional projecting system of single optical path , double -light -path and three light paths thereof

Info

Publication number: CN205121096U
Application number: CN201520433965.XU
Authority: CN
Inventors: 刘飞; 龚杰; 苏鹏华; 柯华恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-06-23
Filing date: 2015-06-23
Publication date: 2016-03-30
Anticipated expiration: 2025-06-23

Abstract

The utility model provides a single box of liquid crystal light valve and three -dimensional projecting system of single optical path, double -light -path and three light paths thereof, three -dimensional projecting system includes: projecting apparatus, single box of liquid crystal light valve and receiving screen. Along the direction of propagation of light, single box of liquid crystal light valve includes reflection reducing coating, polaroid, a glass board, first conducting layer, first orientation layer, liquid crystal layer, second orientation layer, second conducting layer, the 2nd glass board, antireflection film in proper order to and first voltage source controller and second voltage source controller, wherein, first voltage source controller and second voltage source controller are communicated mutually with the projecting apparatus to be connected with first conducting layer and second conducting layer respectively. The utility model discloses a single box of liquid crystal light valve can simplify traditional liquid crystal light valve structure to light phase modulate, and reduce cost improves imaging.

Description

Single box liquid crystal light valve and monochromatic light road, double light path and three light path stereo projection systems

Technical field

The utility model relates to stereo projection technology field, particularly relates to single box liquid crystal light valve structure and comprises the stereo projection system of described single box liquid crystal light valve.

Background technology

In stereo display product, the 3D Projection Display adopting polarising glass is current main product, but due to the restriction by cost etc., is mainly used in the special dimensions such as amusement (as stereophonic cinema), virtual reality at present.The polarization 3D 3 d display device come into operation, general adopts two 2D (two dimension) projector, and every platform all contains one group of polarized light separator, the phase difference film of generation ± λ/4 and projecting lens, two shared projection screens of 2D projector.The Projection Display of this structure adopts two projector, and therefore device volume is huge, produce and operating cost high.

On the other hand, the liquid crystal light valve that current employing one projector realizes using in the technology of stereoprojection is by the two box liquid crystal structures driving liquid crystal cell and compensation liquid crystal cell to form, there is more serious light absorption phenomenon and dispersion phenomenon in the twisted-nematic TN type liquid crystal layer of wherein used two boxes or super twisted nematic STN type liquid crystal layer, thus causes poor Projection Display effect.Meanwhile, also there is complex structure, the shortcomings such as cost is high, and light efficiency is low in two box liquid crystal type light valve.

Therefore, need single box liquid crystal light valve is provided and utilizes the stereo projection system of single box liquid crystal light valve to solve the problems referred to above.

Utility model content

For solving the problem, the utility model provides single box liquid crystal light valve and stereo projection system.

A kind of single box liquid crystal light valve, it is characterized in that, along the direction of propagation of light, comprise polaroid, quarter-wave plate, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate successively, and the first voltage controller and the second voltage controller; Wherein, described first voltage controller communicates mutually with projector with the second voltage controller, and is connected with the second conductive layer with the first conductive layer respectively.

Described polaroid is used for through the light parallel with its direction that thoroughly shakes, and obtains First Line polarized light; Described quarter-wave plate and described polaroid bond, and its fast axle and described First Line polarized light direction of vibration (or-45 °) at 45 °, be modulated into the first circularly polarized light for making described First Line polarized light; Described first glass plate and the second glass plate for keeping described liquid crystal layer, described first glass plate and the second glass plate uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer bond the plane of incidence with the exit facet of the first glass plate and the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described first circularly polarized light phase place, make through the first circularly polarized light be modulated to left circularly polarized light and right-circularly polarized light alternate frame; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer.

Wherein, the first voltage controller and the second voltage controller have shared ground wire, and the first voltage controller and the second voltage controller are connected with single box liquid crystal light valve two conductive layer respectively, export different voltage chronologically, form a circuit loop.

First voltage controller communicates mutually with projector with described second voltage controller, refer to that projector directly exports square wave electric signal, directly by the first voltage controller and the second voltage controller receive, then the first voltage controller and the second voltage controller press the sequential output voltage of accompanying drawing 2, control the work of single box liquid crystal light valve.

Wherein, the first voltage controller and the second voltage controller each work period can be divided into four continuous phase equal time sections, and described four time periods are followed successively by first time period, the second time period, the 3rd time period and the 4th time period; First voltage controller and the second voltage controller export three kinds of level successively respectively within four described time periods;

Described three kinds of level are followed successively by the first high level, the second high level and low level; In described first time period; First electric voltage controlled source device exports the first high level, the second voltage controller output low level; In described second time period, the first voltage controller exports the second high level, the second voltage controller output low level; In described 3rd time period, the first voltage controller output low level, the second electric voltage controlled source device exports the first high level; In described 4th time period, the first voltage controller output low level, the second electric voltage controlled source device exports the second high level;

Wherein, described first time period and in the 3rd time period, described liquid crystal layer postpones 0 phase differential to described first circularly polarized light, and the first circularly polarized light of permeate crystal layer is still the first circularly polarized light; In second time period and the 4th time period, described liquid crystal layer postpones π phase differential to described first circularly polarized light, and the first circularly polarized light of permeate crystal layer is modulated into the second circularly polarized light of reverse rotation.

Another kind of single box liquid crystal light valve, it is characterized in that, along the direction of propagation of light, comprise polaroid, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate successively, and the first voltage controller and the second voltage controller; Wherein, described first voltage controller communicates mutually with projector with the second voltage controller, and is connected with the second conductive layer with the first conductive layer respectively.

Described polaroid is used for through the light parallel with its direction that thoroughly shakes, and obtains First Line polarized light; Described first glass plate and the second glass plate for keeping described liquid crystal layer, described first glass plate and the second glass plate uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer bond the plane of incidence with the exit facet of the first glass plate and the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described First Line polarized light phase place, make through First Line polarized light be modulated to left circularly polarized light and right-circularly polarized light alternate frame; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer;

Wherein, the first voltage controller and the second voltage controller each work period can be divided into four continuous phase equal time sections, and described four time periods are followed successively by first time period, the second time period, the 3rd time period and the 4th time period; First voltage controller and the second voltage controller export three kinds of level successively respectively within four described time periods, and described three kinds of level are secondary is the first high level, the second high level and low level; In described first time period; First voltage controller exports the first high level, the second voltage controller output low level; In described second time period, the first electric voltage controlled source device exports the second high level, the second voltage controller output low level; In described 3rd time period, the first electric voltage controlled source device output low level, the second voltage controller exports the first high level; In described 4th time period, the first voltage controller output low level, the second voltage controller exports the second high level;

Wherein, described first time period and in the 3rd time period, it is poor that described liquid crystal layer postpones pi/2 phase to described First Line polarized light, and the First Line polarized light of permeate crystal layer is modulated to the first circularly polarized light; In second time period and the 4th time period, described liquid crystal layer postpones (3 π)/2 phase differential to described First Line polarized light, and the First Line polarized light of permeate crystal layer is modulated into the second circularly polarized light of reverse rotation.

Above-mentioned two kinds of single box liquid crystal light valves, preferably, along the direction of propagation of light, foremost also comprises anti-reflection film, or/and also comprise antireflection film backmost.Described anti-reflection film is for increasing the transmitance of projector projects to the random polarization of described single box liquid crystal light valve; Described antireflection film is bonded in the exit facet of the second glass plate, for reducing the reflected light of described second glass plate exit facet, thus reduces system parasitic light.

A monochromatic light road stereo projection system containing single box liquid crystal light valve, is characterized in that, comprise projector, single box liquid crystal light valve and receiving screen; Wherein, described projector, for projecting sequential chart as random polarization flashlight; Described single box liquid crystal light valve, after being placed in projector exit window, makes the sequential chart image signal optical modulation received from described projector become left circularly polarized light and right-circularly polarized light alternate frame; Described receiving screen, for receiving from the left circularly polarized light of the process of projector outgoing single box liquid crystal light valve modulation and right-circularly polarized light alternate frame and reflecting.

A double light path stereo projection system containing single box liquid crystal light valve, is characterized in that, comprise projector, double light path polarization splitting prism, half-wave plate, reflecting element, focusing lens group, single box liquid crystal light valve and receiving screen; Wherein, described projector, for projecting sequential chart as random polarization flashlight; Described double light path polarization splitting prism, after being arranged on projector, is divided into the First Line polarized light of the first light path of transmission as random polarization flashlight by the sequential chart gone out by projector projects, and the second linearly polarized light of the second light path of reflection; Described half-wave plate, is arranged in the second light path bonding with double light path polarization splitting prism exit facet, inclined for the second linearly polarized light is converted to First Line polarized light; Described reflecting element, is arranged on the First Line polarized light from half-wave plate outgoing leads by the second light path the first light path and the first inclined line of the first light path light that shakes and overlaps; Described focusing lens group, is arranged in the first light path after double light path polarization splitting prism exit facet, at the different projector distance of different environmental modulation; Described focusing lens group is made up of the first lens and the second lens, and described first lens are plano-convex lens, and described second lens are plano-concave lens; Described single box liquid crystal light valve, is arranged in the light path that the first light path overlaps with the second light path, First Line polarized light is modulated into left circularly polarized light and right-circularly polarized light alternate frame; Described receiving screen, for receiving circularly polarized light alternate frame that the left-handed and dextrorotation after the modulation of single box liquid crystal light valve replaces and reflecting.

Preferably, described reflecting element is plane mirror or the prism with the effect of reflection image rotation; Described reflecting element angle of inclination size is adjustable, according to different projector distances, regulates different angles of inclination.

The another kind of double light path stereo projection system containing single box liquid crystal light valve, is characterized in that, comprise projector, double light path polarization splitting prism, reflecting element, focusing lens group, first single box liquid crystal light valve, the second single box liquid crystal light valve and receiving screen; Half-wave plate is provided with before the polaroid of wherein second single box liquid crystal light valve; Wherein, double light path polarization splitting prism is placed in projector emitting light path, the random polarization picture signal light that projector projects goes out by double light path polarization splitting prism is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and reflected light path is the second light path; The focusing lens group that first lens and the second lens form is positioned in the first light path, for regulating the projector distance in different projection environment; After first liquid crystal light valve is positioned over the second lens of the first light path, the First Line polarized light from lens outgoing is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; Reflecting element is positioned in the second light path, and the second linearly polarized light is turned to the first optical path direction; Second liquid crystal light valve is positioned in the second light path, and after being placed in reflecting element, for the second linearly polarized light being converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen is positioned over described two single box liquid crystal light valves, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

A kind of three light path stereo projection systems containing single box liquid crystal light valve, it is characterized in that, comprise projector, three light path polarization splitting prisms, the first half-wave plate, the second half-wave plate, the first reflecting element, the second reflecting element, focusing lens group, single box liquid crystal light valve and receiving screen; Wherein, described projector, for projecting sequential chart as random polarization flashlight; Described three light path polarization splitting prisms, after being arranged at projector, the sequential chart gone out by projector projects is divided into the First Line polarized light of the first light path of transmission as random polarization flashlight, second linearly polarized light of the second light path of reflection and the second linearly polarized light of the 3rd light path, second light path is identical with the polarization state of the linearly polarized light of the 3rd light path, is all the second linearly polarized light; Described three light path polarization splitting prisms are provided with four logical light faces, and described four logical light faces are respectively, the plane of incidence, the first exit facet, the second exit facet and the 3rd exit facet; Described first half-wave plate and the second half-wave plate, be arranged in the second light path and the 3rd light path respectively, be bonded in described three light path polarization splitting prisms respectively second leads on light face exit facet and threeway light face exit facet, respectively the second linearly polarized light of the second light path and the 3rd light path is modulated into First Line polarized light; Described first half-wave plate exit facet and the second half-wave plate exit facet post anti-reflection film respectively; Described first reflecting element and the second reflecting element, be arranged in the second light path and the 3rd light path respectively, and lead the second light path polarized light and the 3rd light path polarized light the first light path respectively respectively, overlaps with the first light path polarized light; Described focusing lens group, is arranged in the first light path after three light path polarization splitting prism exit facets, at the different projector distance of different environmental modulation; Described focusing lens group is made up of the first lens and the second lens, and described first lens are plano-convex lens, and described second lens are plano-concave lens; Described single box liquid crystal light valve, is arranged in the light path of the first light path, the second light path and the 3rd light path coincidence, First Line polarized light is modulated into the left-handed circularly polarized light replaced with dextrorotation; Described first circularly polarized light and described second circularly polarized light alternate frame project described receiving screen.

Preferentially, described reflecting element is plane mirror or the prism with the effect of reflection image rotation; Described reflecting element angle of inclination size is adjustable, according to different projector distances, regulates different angles of inclination.

The another kind of three light path stereo projection systems containing single box liquid crystal light valve, it is characterized in that, comprise projector, three light path polarization splitting prisms, the first reflecting element, the second reflecting element, focusing lens group, first single box liquid crystal light valve, second single box liquid crystal light valve, the 3rd single box liquid crystal light valve and receiving screen; The first half-wave plate and the second half-wave plate is respectively equipped with before the polaroid of wherein second single box liquid crystal light valve and the 3rd single box liquid crystal light valve; Wherein, three light path polarization splitting prisms are placed in projector emitting light path, the random polarization picture signal light that projector is launched by three light path polarization splitting prisms is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and two-way reflected light path is respectively the second light path and the 3rd light path; The focusing lens group that first lens and the second lens form is positioned in the first light path, for regulating the projector distance in different projection environment; First reflecting element is positioned in the second light path, and the second reflecting element is positioned in the 3rd light path, the first reflecting element and the second reflecting element respectively by its second linearly polarized light in the optical path turn to the first light path; First single box liquid crystal light valve is positioned in the first light path after the second lens, First Line polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; Second liquid crystal light valve is positioned in the second light path after the first reflecting element, the second linearly polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; 3rd single box liquid crystal light valve to be positioned in the 3rd light path after the second reflecting element, the second linearly polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen is positioned over three single box liquid crystal light valves, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

Single box liquid crystal light valve of the present utility model by optimizing traditional double box liquid crystal light valve structure, and changes the power-supplying forms of liquid crystal light valve, not only simplifies stereo projection system structure, reduces production cost and can obtain higher light efficiency, better image quality.

Accompanying drawing explanation

Fig. 1 is the one list box liquid crystal light valve structure schematic diagram of embodiment 1;

Fig. 2 is projector output timing image right and left eyes alternate frame signal, the first voltage controller of single box liquid crystal light valve and the second voltage controller output voltage waveform;

Fig. 3 is the equivalent AC voltage oscillogram of projector output timing image right and left eyes alternate frame signal and single box liquid crystal light valve;

Fig. 4 a is the first time period t of single box liquid crystal light valve at one-period T ₁with the 3rd time period t ₃interior focusing polarization state modulation schematic diagram;

Fig. 4 b is second time period t of single box liquid crystal light valve at one-period T ₂with the 4th time period t ₄interior focusing polarization state modulation schematic diagram;

Fig. 5 is the second list box liquid crystal light valve structure schematic diagram of embodiment 2;

Fig. 6 a is the first time period t of the second list box liquid crystal light valve at one-period T ₁with the 3rd time period t ₃interior focusing polarization state modulation schematic diagram;

Fig. 6 b is second time period t of the second list box liquid crystal light valve at one-period T ₂with the 4th time period t ₄interior focusing polarization state modulation schematic diagram;

Fig. 7 is a kind of monochromatic light road stereo projection system embodiment schematic diagram of embodiment 3 scheme;

Fig. 8 is a kind of double light path stereo projection system embodiment schematic diagram of embodiment 4 scheme;

Fig. 9 is the another kind of double light path stereo projection system embodiment schematic diagram of embodiment 5 scheme;

Figure 10 is the one list box liquid crystal light valve structure schematic diagram of embodiment 5 scheme;

Figure 11 is the another kind list box liquid crystal light valve structure schematic diagram of embodiment 5 scheme;

Figure 12 is the one three light path stereo projection system embodiment schematic diagram of embodiment 6 scheme;

Figure 13 is the another kind three light path stereo projection system embodiment schematic diagram of embodiment 7 scheme.

100, single box liquid crystal light valve; 101, anti-reflection film; 102, antireflection film; 103, polaroid; 104, quarter-wave plate; 105, the first glass plate; 106, the second glass plate; 107, the first conductive layer; 108, the second conductive layer; 109, the first oriented layer; 110, the second oriented layer; 111, liquid crystal layer; 112, the first voltage controller; 113, the second voltage controller;

200, single box liquid crystal light valve; 201, anti-reflection film; 202, antireflection film; 203, polaroid; 204, the first glass plate; 205, the second glass plate; 206, the first conductive layer; 207, the second conductive layer; 208, the first oriented layer; 209, the second oriented layer; 210, liquid crystal layer; 212, the first voltage controller; 213, the second voltage controller;

301, projector; 302, single box liquid crystal light valve; 303, alternate frame; 304, receiving screen;

401, random polarization; 402, First Line polarized light; 403, the first circularly polarized light; 406, the first liquid crystal cell; 407, the second liquid crystal cell; 410, the first circularly polarized light; 420, the second circularly polarized light;

501, projector; 502, double light path polarization splitting prism; 503, the first lens; 504, the second lens; 505, single box liquid crystal light valve; 507, reflecting element; 508, half-wave plate; 510, receiving screen;

601, projector; 602, double light path polarization splitting prism; 603, the first lens; 604, the second lens; 605, first single box liquid crystal light valve; 606, second single box liquid crystal light valve; 607, reflecting element; 610, receiving screen;

701, projector; 702, three light path polarization splitting prisms; 703, the first half-wave plate; 704, the second half-wave plate; 705, the first reflecting element; 706, the second reflecting element; 707, the first lens; 708, the second lens; 709, single box liquid crystal light valve; 710, receiving screen;

801, projector; 802, three light path polarization splitting prisms; 803, the first reflecting element; 804, the second reflecting element; 805, the first lens; 806, the second lens; 807, first single box liquid crystal light valve; 808, second single box liquid crystal light valve; 809, the 3rd single box liquid crystal light valve; 810, receiving screen.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Embodiment 1

Embodiment 1 of the present utility model single box liquid crystal light valve structure schematic diagram see Fig. 1, Fig. 1.As shown in Figure 1, in the present embodiment, single box liquid crystal light valve structure 100 comprises anti-reflection film 101, polaroid 103, quarter-wave plate 104, two pieces of glass plates 105 and 106, two conductive layers 107 and 108, two oriented layer 109 and 110, liquid crystal layer 111, antireflection film 102, first voltage controller 112 and the second voltage controller 113.

In the present embodiment, anti-reflection film 101 bonds with the plane of incidence of polaroid 103; The exit facet of polaroid 103 and the plane of incidence of quarter-wave plate 104 bond; The exit facet of quarter-wave plate 104 and the plane of incidence of the first glass plate 105 bonding; First conductive layer 107 is bonded in the exit facet of the first glass plate, and the second conductive layer 108 is bonded in the plane of incidence of the second glass plate 106; Exit facet and first oriented layer 109 of the first conductive layer 107 bond, and the plane of incidence and second oriented layer 110 of the second conductive layer 108 bond; Liquid crystal layer 111 is placed between two oriented layer 109 and 110; Antireflection film 102 is bonded in the exit facet of the second glass plate 106; First voltage controller 112 is connected with the first conductive layer 107, and provides the first voltage to the first conductance layer 107, and the second voltage controller 113 is connected with the second conductive layer 108, and provides the second voltage to the second conductive layer 108; In the present embodiment, composition graphs 1, Fig. 2 and Fig. 3, periodically send sequential chart as right and left eyes alternate frame signal according to projector, in one-period T, can be divided into four continuous phase equal time section t ₁, t ₂, t ₃and t ₄; First time period t ₁with the 3rd time period t ₃send right eye flashlight R, the second time period t ₂with the 4th time period t ₄send left eye flashlight L; Single box liquid crystal light valve communicates with projector, it is corresponding that first voltage controller 112 and second voltage controller 113 each work period and projector send signal period T, and four continuous phase equal time sections and projector send four time period t in flashlight one-period T ₁, t ₂, t ₃and t ₄corresponding; First voltage controller 112 and the second voltage controller 113 export three kinds of level successively respectively within four time periods, are respectively the first high level v ₁, the second high level v ₂with low level 0; First time period t ₁in, the first voltage controller 112 exports the first high level v ₁, the second voltage controller 113 output low level 0; Second time period t ₂in, the first voltage controller 112 exports the second high level v ₂, the second voltage controller 113 output low level 0; 3rd time period t ₃in, the first voltage controller 112 output low level 0, second voltage controller 113 exports the first high level v ₁; 4th time period t ₄in, the first voltage controller 112 output low level 0, second voltage controller 113 exports the second high level v ₂, the first voltage controller 112 and the second voltage controller 113 form the equivalent AC voltage source of single box liquid crystal;

In the present embodiment, be the simplified schematic diagram that single box liquid crystal light valve 100 pairs of light phases are modulated see Fig. 4 a and Fig. 4 b, Fig. 4 a and Fig. 4 b.The random polarization 401 sent by projector incides polaroid 103 through after anti-reflection film 101, and wherein anti-reflection film 101 plays the effect increasing transmitted light transmitance; The random polarization of incidence is modulated to the direction of vibration First Line polarized light 402 identical with its direction that thoroughly shakes by polaroid 103; First Line polarized light 402 incides quarter-wave plate 104, First Line polarized light 402 is modulated into the first circularly polarized light 403 by quarter-wave plate 104, wherein, the quick shaft direction of quarter-wave plate 104 and the direction of vibration of First Line polarized light (or-45 °) at 45 °; First circularly polarized light 403 incides the first liquid crystal cell 406; See Fig. 4 a, projector sends the clock signal light of random polarization, in one-period T, and first time period t ₁with the 3rd time period t ₃, the first liquid crystal cell 406 postpones 0 phase differential to the first circularly polarized light 403, and the polarized light 410 of outgoing is still the first circularly polarized light; See Fig. 4 b, in the second time period t ₂with the 4th time period t ₄in, liquid crystal layer postpones π phase differential to the first circularly polarized light 403, and after permeate crystal layer, the first circularly polarized light 403 is modulated into the second circularly polarized light 420 of reverse rotation.So, in one-period T, be left circularly polarized light and right-circularly polarized light alternate frame from the polarized light through counnter attack film 102 of liquid crystal cell outgoing, wherein, counnter attack film plays the effect reducing surface reflection.

Embodiment 2

Embodiment 2 of the present utility model single box liquid crystal light valve structure schematic diagram see Fig. 5, Fig. 5.As shown in Figure 5, in the present embodiment, single box liquid crystal light valve structure 200 comprises anti-reflection film 201, polaroid 203, two pieces of glass plates 204 and 205, two conductive layers 206 and 207, two oriented layer 208 and 209, liquid crystal layer 210, antireflection film 202, first voltage controller 212 and the second voltage controller 213.

In the present embodiment, single box liquid crystal light valve communicates with projector, described in the working method of the first voltage controller 212 and the second voltage controller 213 and embodiment 1, the first voltage controller 112 of single box liquid crystal light valve is identical with the second voltage controller 113 working method, and difference is the first high level v provided ₁value and the second high level v ₂value is different, thus produces different phase delay to light, does not repeat herein;

In the present embodiment, be the simplified schematic diagram that single box liquid crystal light valve 200 pairs of light phases are modulated see Fig. 6 a and Fig. 6 b, Fig. 6 a and Fig. 6 b.The random polarization 401 sent by projector incides polaroid 203 through after anti-reflection film 201, and wherein anti-reflection film 201 plays the effect increasing transmitted light transmitance; The random polarization of incidence is modulated to the direction of vibration First Line polarized light 402 identical with its direction that thoroughly shakes by polaroid 203; First Line polarized light 402 incides the second liquid crystal cell 407; See Fig. 4 a, projector sends the clock signal light of random polarization, within a cycle, and first time period t ₁with the 3rd time period t ₃, the second liquid crystal cell 407 pairs of First Line polarized lights 402 postpone pi/2 phase difference, and the polarized light of outgoing is the first circularly polarized light 410; See Fig. 4 b, in the second time period t ₂with the 4th time period t ₄, liquid crystal layer postpones (3 π)/2 phase differential to First Line polarized light 402, and the polarized light of outgoing is the second circularly polarized light 420.So, in one-period T, be left circularly polarized light and right-circularly polarized light alternate frame from the polarized light through antireflection film 202 of liquid crystal cell outgoing, wherein, antireflection film 202 plays the effect reducing surface reflection.

Embodiment 3

See a kind of monochromatic light road stereo projection system schematic diagram that Fig. 7, Fig. 7 are embodiments 3 disclosed in the utility model.As shown in Figure 7, in the present embodiment, monochromatic light road stereo projection system comprises projector 301, single box liquid crystal light valve 302 and receiving screen 304.

In the present embodiment, single box liquid crystal light valve 302 is arranged in projector 301 emitting light path, projector 301 is with the synchronous communication of single box liquid crystal light valve 302 and project sequential chart as random polarization flashlight, sequential chart as random polarization flashlight after single box liquid crystal light valve 302 is modulated, be modulated into left circularly polarized light and right-circularly polarized light alternate frame 303, left circularly polarized light and right-circularly polarized light alternate frame 303 project receiving screen 304.

In the present embodiment, what described single box liquid crystal light valve 302 adopted is shown in Fig. 1, single box liquid crystal light valve 100 structure technology scheme in embodiment 1 of the present utility model, described single box liquid crystal light valve 100 structure and working principle provides detailed description in embodiment 1, repeats no more herein.

In the present embodiment, described in described single box liquid crystal light valve 302 usable embodiment 2, single box liquid crystal light valve 200 substitutes;

Embodiment 4

See a kind of double light path stereo projection system schematic diagram that Fig. 8, Fig. 8 are embodiments 4 disclosed in the utility model.As shown in Figure 8, in the present embodiment, double light path stereo projection system comprises focusing lens group, half-wave plate 508, reflecting element 507, single box liquid crystal light valve 505 and the receiving screen 510 that projector 501, double light path polarization splitting prism 502, first lens 503 and the second lens 504 form.

In the present embodiment, double light path polarization splitting prism 502 is placed in projector 501 emitting light path, the random polarization picture signal light that projector is launched by double light path polarization splitting prism 502 is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and reflected light path is the second light path.The focusing lens group that first lens 503 and the second lens 504 form is positioned in the first light path, for regulating the projector distance in different projection environment; The exit facet of the plane of incidence of half-wave plate 508 and the second light path of double light path polarization splitting prism 502 is bonding, converts the second linearly polarized light of reflection to First Line polarized light; Reflecting element 507 is positioned in the second light path, and the First Line polarized light after conversion is turned to and overlapped with the First Line polarized light of the first light path; Single box liquid crystal light valve 505 is positioned in the light path that the first light path overlaps with the second light path, First Line polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen 510 is positioned over single box liquid crystal light valve 505, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

In the present embodiment, described reflecting element can be plane of reflection mirror, have the prism of reflection image rotation effect; Wherein said reflecting element angle of inclination size is adjustable, according to different projector distances, regulates different angles of inclination;

In the present embodiment, what described single box liquid crystal light valve 505 adopted is shown in Fig. 1, single box liquid crystal light valve 100 structure technology scheme in embodiment 1 of the present utility model, described single box liquid crystal light valve 100 structure and working principle provides detailed description in embodiment 1, repeats no more herein.

In the present embodiment, described in described single box liquid crystal light valve 505 usable embodiment 2, single box liquid crystal light valve 200 substitutes.

Embodiment 5

See the another kind of double light path stereo projection system schematic diagram that Fig. 9, Fig. 9 are embodiments 5 disclosed in the utility model.In the present embodiment, double light path stereo projection system comprises focusing lens group that projector 601, double light path polarization splitting prism 602, first lens 603 and the second lens 604 form, reflecting element 607, first single box liquid crystal light valve 605, second single box liquid crystal light valve 606 and receiving screen 610.

In the present embodiment, double light path polarization splitting prism 602 is placed in projector 601 emitting light path, the random polarization picture signal light that projector projects goes out by double light path polarization splitting prism 602 is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and reflected light path is the second light path.The focusing lens group that first lens 603 and the second lens 604 form is positioned in the first light path, for regulating the projector distance in different projection environment; First Line polarized light from lens outgoing is converted to the alternate frame of left circularly polarized light and right-circularly polarized light after being positioned over the second lens 604 of the first light path by first single box liquid crystal light valve 605; Reflecting element 607 is positioned in the second light path, and the second linearly polarized light is turned to the first optical path direction; Second single box liquid crystal light valve 606 is positioned in the second light path, and after being placed in reflecting element 607, for the second linearly polarized light being converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen 610 is positioned over described two single box liquid crystal light valves, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

In the present embodiment, what described first single box liquid crystal light valve 605 adopted is shown in Fig. 1, single box liquid crystal light valve 100 structure technology scheme in embodiment 1 of the present utility model, described single box liquid crystal light valve 100 structure and working principle provides detailed description in embodiment 1, repeats no more herein.

In the present embodiment, described in described first single box liquid crystal light valve 605 usable embodiment 2, single box liquid crystal light valve 200 substitutes; In the present embodiment, see Figure 10, described second single box liquid crystal light valve 606 is as shown in Figure 10 liquid crystal light valve 300.Described liquid crystal light valve 300 is on box liquid crystal light valve 100 architecture basics single described in embodiment 1, the position of the half-wave plate 508 described in embodiment 4 is adjusted in single box liquid crystal light valve described in embodiment 1, and is placed between anti-reflection film 101 and polaroid 103 and forms another kind of single box liquid crystal light valve structure 300.Be placed in stereo projection system, its principle of work is identical with embodiment 1, repeats no more herein.

In the present embodiment, see Figure 11, described second single box liquid crystal light valve 606 can substitute with liquid crystal light valve 400 shown in Figure 11.Described liquid crystal light valve 400 is on box liquid crystal light valve 200 architecture basics single described in embodiment 2, the position of the half-wave plate 508 described in embodiment 4 is adjusted in single box liquid crystal light valve described in embodiment 2, and is placed between anti-reflection film 201 and polaroid 203 and forms another kind of single box liquid crystal light valve structure 400.Be placed in stereo projection system, its principle of work is identical with embodiment 2, repeats no more herein.

Embodiment 6

See the one three light path stereo projection system schematic diagram that Figure 12, Figure 12 are embodiments 6 disclosed in the utility model.As shown in figure 12, in the present embodiment, three light path stereo projection systems comprise focusing lens group, single box liquid crystal light valve 709 and the receiving screen 710 that projector 701, three light path polarization splitting prism 702, first half-wave plate 703, second half-wave plate 704, first reflecting element 705, second reflecting element 706, first lens 707 and the second lens 708 form.

In the present embodiment, three light path polarization splitting prisms 702 are placed in projector 701 emitting light path, the random polarization picture signal light that projector is launched by three light path polarization splitting prisms 702 is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and two-way reflected light path is respectively the second light path and the 3rd light path.The focusing lens group that first lens 707 and the second lens 708 form is positioned in the first light path, for regulating the projector distance in different projection environment; The exit facet of the plane of incidence of the first half-wave plate 703 and the second light path of three light path polarization splitting prisms 702 is bonding, the exit facet of the 3rd light path of the second half-wave plate 704 and three light path polarization splitting prisms 702 is bonding, and the first half-wave plate 703 and the second half-wave plate 704 convert the second linearly polarized light to First Line polarized light respectively; First reflecting element 705 is positioned in the second light path, and the second reflecting element 706 is positioned in the 3rd light path, and the First Line polarized light after conversion turns to and overlaps with the First Line polarized light of the first light path by the first reflecting element 705 and reflecting element the 2 706 respectively; In single light path that box liquid crystal light valve 709 is positioned over the first light path, the second light path overlaps with the 3rd light path, First Line polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen 710 is positioned over single box liquid crystal light valve 709, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

In the present embodiment, what described single box liquid crystal light valve 709 adopted is shown in Fig. 1, single box liquid crystal light valve 100 structure technology scheme in embodiment 1 of the present utility model, described single box liquid crystal light valve 100 structure and working principle provides detailed description in embodiment 1, repeats no more herein.

In the present embodiment, described in described single box liquid crystal light valve 709 usable embodiment 2, single box liquid crystal light valve 200 substitutes.

Embodiment 7

See another three light path stereo projection system schematic diagram that Figure 13, Figure 13 are embodiments 7 disclosed in the utility model.As shown in figure 13, in the present embodiment, three light path stereo projection systems comprise focusing lens group, the single box liquid crystal light valve 808 of first reflecting element 803, second reflecting element 804, first single box liquid crystal light valve 807, second, the 3rd single box liquid crystal light valve 809 and the receiving screen 810 that projector 801, three light path polarization splitting prism 802, first lens 805 and the second lens 806 form.

In the present embodiment, three light path polarization splitting prisms 802 are placed in projector 801 emitting light path, the random polarization picture signal light that projector is launched by three light path polarization splitting prisms 802 is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and two-way reflected light path is respectively the second light path and the 3rd light path.The focusing lens group that first lens 805 and the second lens 806 form is positioned in the first light path, for regulating the projector distance in different projection environment; First reflecting element 803 is positioned in the second light path, and the second reflecting element 804 is positioned in the 3rd light path, the first reflecting element 803 and the second reflecting element 804 respectively by its second linearly polarized light in the optical path turn to the first light path; First single box liquid crystal light valve 807 is positioned in the first light path after lens 806, First Line polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; Second single box liquid crystal light valve 808 to be positioned in the second light path after the first reflecting element 803, the second linearly polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; 3rd single box liquid crystal light valve 809 to be positioned in the 3rd light path after the second reflecting element 804, the second linearly polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen 810 is positioned over three single box liquid crystal light valves, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

In the present embodiment, what described first single box liquid crystal light valve 807 adopted is shown in Fig. 1, single box liquid crystal light valve 100 structure technology scheme in embodiment 1 of the present utility model, described single box liquid crystal light valve 100 structure and working principle provides detailed description in embodiment 1, repeats no more herein.

In the present embodiment, described in described first single box liquid crystal light valve 807 usable embodiment 2, single box liquid crystal light valve 200 substitutes; In the present embodiment, what described second single box liquid crystal light valve 808 and the 3rd single box liquid crystal light valve 809 adopted is single box liquid crystal light valve 300 structure technology scheme described in embodiment 5 shown in Figure 10, of the present utility model, described single box liquid crystal light valve 300 structure and working principle provides detailed description in preceding embodiment, repeats no more herein.

In the present embodiment, described in described second single box liquid crystal light valve 808 and the 3rd single box liquid crystal light valve 809 usable embodiment 5, single box liquid crystal light valve 400 substitutes.

Embodiment 8

The one list box liquid crystal light valve that the present embodiment provides, along the direction of propagation of light, comprise anti-reflection film, polaroid, quarter-wave plate, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate, antireflection film successively, and the first voltage controller and the second voltage controller; Wherein, described first voltage controller communicates mutually with projector with the second voltage controller, and is connected with the second conductive layer with the first conductive layer respectively.

Described anti-reflection film is for increasing the transmitance of projector projects to the random polarization of described single box liquid crystal light valve; Described polaroid is used for through the light parallel with its direction that thoroughly shakes, and obtains First Line polarized light; Described quarter-wave plate and described polaroid bond, and its fast axle and described First Line polarized light direction of vibration (or-45 °) at 45 °, be modulated into the first circularly polarized light for making described First Line polarized light; Described first glass plate and the second glass plate for keeping described liquid crystal layer, described first glass plate and the second glass plate uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer bond the plane of incidence with the exit facet of the first glass plate and the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described first circularly polarized light phase place, make through the first circularly polarized light be modulated to left circularly polarized light and right-circularly polarized light alternate frame; Described antireflection film is bonded in the exit facet of the second glass plate, for reducing the reflected light of described second glass plate exit facet, thus reduces system parasitic light; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer.

Wherein, the first voltage controller and the second voltage controller each work period can be divided into four continuous phase equal time sections, and described four time periods are followed successively by first time period, the second time period, the 3rd time period and the 4th time period; First voltage controller and the second voltage controller export three kinds of level successively respectively within four described time periods.

Described three kinds of level are followed successively by the first high level, the second high level and low level; In described first time period; First electric voltage controlled source device exports the first high level, the second voltage controller output low level; In described second time period, the first voltage controller exports the second high level, the second voltage controller output low level; In described 3rd time period, the first voltage controller output low level, the second electric voltage controlled source device exports the first high level; In described 4th time period, the first voltage controller output low level, the second electric voltage controlled source device exports the second high level.

Embodiment 9

The present embodiment provides another kind of single box liquid crystal light valve, comprise successively: anti-reflection film, polaroid, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate, antireflection film, and the first voltage controller and the second voltage controller; Wherein, described first voltage controller communicates mutually with projector with the second voltage controller, and is connected with the second conductive layer with the first conductive layer respectively.

Described anti-reflection film is for increasing the transmitance of projector projects to the random polarization of described single box liquid crystal light valve; Described polaroid is used for through the light parallel with its direction that thoroughly shakes, and obtains First Line polarized light; Described first glass plate and the second glass plate for keeping described liquid crystal layer, described first glass plate and the second glass plate uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer bond the plane of incidence with the exit facet of the first glass plate and the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described First Line polarized light phase place, make through First Line polarized light be modulated to left circularly polarized light and right-circularly polarized light alternate frame; Described antireflection film is bonded in appearing of the second glass plate, for reducing the reflected light of described second glass plate exit facet, thus reduces system parasitic light; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer.

Wherein, the first voltage controller and the second voltage controller each work period can be divided into four continuous phase equal time sections, and described four time periods are followed successively by first time period, the second time period, the 3rd time period and the 4th time period; First voltage controller and the second voltage controller export three kinds of level successively respectively within four described time periods, and described three kinds of level are secondary is the first high level, the second high level and low level; In described first time period; First voltage controller exports the first high level, the second voltage controller output low level; In described second time period, the first electric voltage controlled source device exports the second high level, the second voltage controller output low level; In described 3rd time period, the first electric voltage controlled source device output low level, the second voltage controller exports the first high level; In described 4th time period, the first voltage controller output low level, the second voltage controller exports the second high level.

Embodiment 10

The present embodiment provides a kind of odd-numbered day light path stereo projection system, comprising:

Projector, for projecting sequential chart as random polarization flashlight;

Single box liquid crystal light valve, after being placed in projector exit window, makes the sequential chart image signal optical modulation received from described projector become left circularly polarized light and right-circularly polarized light alternate frame;

Receiving screen, for receiving from the left circularly polarized light of the process of projector outgoing single box liquid crystal light valve modulation and right-circularly polarized light alternate frame and reflecting;

Described single box liquid crystal light valve comprises anti-reflection film, polaroid, quarter-wave plate, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate, antireflection film, the first voltage controller and the second voltage controller.

Described anti-reflection film is for increasing the transmitance of projector projects to the random polarization of described single box liquid crystal light valve; Described polaroid is used for through the light parallel with its direction that thoroughly shakes, and obtains First Line polarized light; Described quarter-wave plate and described polaroid bond, and its fast axle and described First Line polarized light direction of vibration (or-45 °) at 45 °, be modulated into the first circularly polarized light for making described First Line polarized light; Described first glass plate and the second glass plate are used for keeping and sealing described liquid crystal layer, described first glass plate and the second glass plate uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer are bonded in the exit facet of the first glass plate and the plane of incidence of the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described first circularly polarized light phase place; Described antireflection film is bonded in appearing of the second glass plate, for reducing the reflected light of described second glass plate exit facet, thus reduces system parasitic light; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer.

Wherein, the first voltage controller and the second voltage controller each work period can be divided into four continuous phase equal time sections, and described four time periods are followed successively by first time period, the second time period, the 3rd time period and the 4th time period; First voltage controller and the second voltage controller export three kinds of level successively respectively within four described time periods, and described three kinds of level are secondary is the first high level, the second high level and low level; In described first time period; First voltage controller exports the first high level, the second voltage controller output low level; In described second time period, the first voltage controller exports the second high level, the second voltage controller output low level; In described 3rd time period, the first voltage controller output low level, the second voltage controller exports the first high level; In described 4th time period, the first voltage controller output low level, the second voltage controller exports the second high level.

Described first circularly polarized light and described second circularly polarized light alternate frame project described receiving screen.

Wherein said single box liquid crystal light valve can replace with described the second list box liquid crystal light valve.

Described receiving screen reflects described alternate frame to follow-up stereoprojection receiving device, as 3D circular polarization glasses.

Embodiment 11

The present embodiment provides a kind of double light path stereo projection system, comprises projector, double light path polarization splitting prism, half-wave plate, reflecting element, focusing lens group, single box liquid crystal light valve and receiving screen;

Described projector, for projecting sequential chart as random polarization flashlight;

Described double light path polarization splitting prism, after being arranged on projector, is divided into the First Line polarized light of the first light path of transmission as random polarization flashlight by the sequential chart gone out by projector projects, and the second linearly polarized light of the second light path of reflection;

Described half-wave plate, is arranged in the second light path bonding with double light path polarization splitting prism exit facet, inclined for the second linearly polarized light is converted to First Line polarized light;

Described reflecting element, be arranged on the First Line polarized light from half-wave plate outgoing leads by the second light path the first light path and the first inclined line of the first light path light that shakes and overlap, described reflecting element can be plane mirror, have the prism of reflection image rotation effect; Wherein said reflecting element angle of inclination size is adjustable, according to different projector distances, regulates different angles of inclination;

Described focusing lens group, is arranged in the first light path after double light path polarization splitting prism exit facet, at the different projector distance of different environmental modulation;

Described single box liquid crystal light valve, is arranged in the light path that the first light path overlaps with the second light path, First Line polarized light is modulated into left circularly polarized light and right-circularly polarized light alternate frame;

Described receiving screen, for receiving circularly polarized light that the left-handed and dextrorotation after the modulation of single box liquid crystal light valve replaces and reflecting to surrounding.

Wherein, the logical light face of described double light path polarization splitting prism three is all coated with anti-reflection film.

Wherein, described focusing lens group is made up of the first lens and the second lens, and described first lens are plano-convex lens, and described second lens are plano-concave lens.

Wherein, described single box liquid crystal light valve, comprises anti-reflection film, polaroid, quarter-wave plate, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate, antireflection film, the first voltage controller and the second voltage controller.

Described anti-reflection film is for increasing the transmitance of the first polarized light projecting described single box liquid crystal light valve; Described polaroid is used for through the First Line polarized light parallel with its direction that thoroughly shakes, and filters out the polarized light of other residual polarization state; Described quarter-wave plate and described polaroid bond, and its fast axle and described First Line polarized light direction of vibration (or-45 °) at 45 °, be modulated into the first circularly polarized light for making described First Line polarized light; Described first glass plate and the second glass plate are used for keeping and sealing described layer of liquid crystal molecule, described first glass plate and the second glass uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer are bonded in the exit facet of the first glass plate and the plane of incidence of the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described first circularly polarized light phase place; Described antireflection film is bonded in the exit facet of the second glass plate, for reducing the reflected light of described second glass plate exit facet, thus reduces system parasitic light; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer.

Wherein, the first voltage controller and the second voltage controller each work period can be divided into four continuous phase equal time sections, and described four time periods are followed successively by first time period, the second time period, the 3rd time period and the 4th time period; First voltage controller and the second voltage controller export three kinds of level successively respectively within four described time periods, and described three kinds of level are secondary is the first high level, the second high level and low level; In described first time period; First voltage controller exports the first high level, the second voltage controller output low level; In described second time period, the first voltage controller exports the second high level, the second voltage controller output low level; In described 3rd time period, the first voltage controller output low level, the second voltage controller exports the first high level; In described 4th time period, the first voltage controller output low level, the second voltage controller exports the second high level, and the first voltage controller and the second voltage controller form the alternating-current voltage source of single box liquid crystal.

Embodiment 12

The present embodiment provides a kind of three light path stereo projection systems, comprises projector, three light path polarization splitting prisms, the first half-wave plate, the second half-wave plate, the first reflecting element, the second reflecting element, focusing lens group, single box liquid crystal light valve and receiving screen.

Described projector, for projecting sequential chart as random polarization flashlight.

Described three light path polarization splitting prisms, after being arranged at projector, the sequential chart gone out by projector projects is divided into the First Line polarized light of the first light path of transmission as random polarization flashlight, second linearly polarized light of the second light path of reflection and the second linearly polarized light of the 3rd light path, second light path is identical with the polarization state of the linearly polarized light of the 3rd light path, is all the second linearly polarized light.

Wherein, described three light path polarization splitting prisms are provided with four logical light faces, and described four logical light faces are respectively, the plane of incidence, the first exit facet, the second exit facet and the 3rd exit facet.

Described first half-wave plate and the second half-wave plate, be arranged in the second light path and the 3rd light path respectively, be bonded in described three light path polarization splitting prisms respectively second leads on light face exit facet and threeway light face exit facet, respectively the second linearly polarized light of the second light path and the 3rd light path is modulated into First Line polarized light.

Wherein, described first half-wave plate exit facet and the second half-wave plate exit facet post anti-reflection film respectively.

Described first reflecting element and the second reflecting element, be arranged in the second light path and the 3rd light path respectively, and lead the second light path polarized light and the 3rd light path polarized light the first light path respectively respectively, overlaps with the first light path polarized light; Wherein said reflecting element can be plane of reflection mirror, have the prism of reflection image rotation effect; Wherein said reflecting element angle of inclination size is adjustable, according to different projector distances, regulates different angles of inclination.

Described focusing lens group, is arranged in the first light path after three light path polarization splitting prism exit facets, at the different projector distance of different environmental modulation.

Described single box liquid crystal light valve, is arranged in the light path of the first light path, the second light path and the 3rd light path coincidence, First Line polarized light is modulated into the left-handed circularly polarized light replaced with dextrorotation.

Wherein, described single box liquid crystal light valve comprises anti-reflection film, polaroid, quarter-wave plate, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate, antireflection film, the first voltage controller and the second voltage controller.

Described anti-reflection film is for increasing the transmitance of the First Line polarized light projecting described single box liquid crystal light valve; Described polaroid is used for through the First Line polarized light parallel with its direction that thoroughly shakes, and filters out the polarized light of other residual polarization state; Described quarter-wave plate and described polaroid bond, and its fast axle and described First Line polarized light direction of vibration (or-45 °) at 45 °, be modulated into the first circularly polarized light for making described First Line polarized light; Described first glass plate and the second glass plate are used for keeping and sealing described layer of liquid crystal molecule, described first glass plate and the second glass plate uniform-light transmission and isotropy; Described first conductive layer and the second conductive layer are bonded in the exit facet of the first glass plate and the plane of incidence of the second glass plate respectively, liquid crystal layer described in the electric field driven that described first conductive layer and the second conductive layer produce; Described first oriented layer and the second oriented layer are bonded in the exit facet of the first conductive layer and the plane of incidence of the second conductive layer respectively, for the liquid crystal molecule in liquid crystal layer described in orientation; Described liquid crystal layer is super twisted nematic STN type liquid crystal layer, plays the effect of modulating described first circularly polarized light phase place; Described antireflection film is bonded in appearing of the second glass plate, for reducing the reflected light of described second glass plate exit facet, thus reduces system parasitic light; Described first voltage controller communicates mutually with projector with described second voltage controller, and the first voltage controller is connected with described first conductive layer and exports the first voltage to the first conductive layer; Second voltage controller is connected with described second conductive layer and exports the second voltage to the second conductive layer.

By the way, single box liquid crystal light valve of the present utility model is by optimizing traditional double box liquid crystal light valve structure, and change the power-supplying forms of liquid crystal light valve, not only simplify stereo projection system structure, reduce production cost and higher light efficiency, better image quality can be obtained.

Above-mentioned embodiment is only preferred implementation of the present utility model; can not limit the scope of the utility model protection with this, change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present utility model all belong to the utility model scope required for protection.

Claims

1. a single box liquid crystal light valve, it is characterized in that, along the direction of propagation of light, comprise polaroid, quarter-wave plate, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate successively, and the first voltage controller and the second voltage controller; Wherein, described first voltage controller communicates mutually with projector with the second voltage controller, and is connected with the second conductive layer with the first conductive layer respectively.

2. single box liquid crystal light valve according to claim 1, it is characterized in that, along the direction of propagation of light, foremost also comprises anti-reflection film, or/and also comprise antireflection film backmost.

3. a single box liquid crystal light valve, it is characterized in that, along the direction of propagation of light, comprise polaroid, the first glass plate, the first conductive layer, the first oriented layer, liquid crystal layer, the second oriented layer, the second conductive layer, the second glass plate successively, and the first voltage controller and the second voltage controller; Wherein, described first voltage controller communicates mutually with projector with the second voltage controller, and is connected with the second conductive layer with the first conductive layer respectively.

4. single box liquid crystal light valve according to claim 3, it is characterized in that, along the direction of propagation of light, foremost also comprises anti-reflection film, or/and also comprise antireflection film backmost.

5. the monochromatic light road stereo projection system containing single box liquid crystal light valve described in the arbitrary claim of claim 1-4, is characterized in that, comprise projector, single box liquid crystal light valve and receiving screen; Wherein, described projector, for projecting sequential chart as random polarization flashlight; Described single box liquid crystal light valve, after being placed in projector exit window, makes the sequential chart image signal optical modulation received from described projector become left circularly polarized light and right-circularly polarized light alternate frame; Described receiving screen, for receiving from the left circularly polarized light of the process of projector outgoing single box liquid crystal light valve modulation and right-circularly polarized light alternate frame and reflecting.

6. the double light path stereo projection system containing single box liquid crystal light valve described in the arbitrary claim of claim 1-4, it is characterized in that, comprise projector, double light path polarization splitting prism, half-wave plate, reflecting element, focusing lens group, single box liquid crystal light valve and receiving screen;

Wherein, described projector, for projecting sequential chart as random polarization flashlight; Described double light path polarization splitting prism, after being arranged on projector, is divided into the First Line polarized light of the first light path of transmission as random polarization flashlight by the sequential chart gone out by projector projects, and the second linearly polarized light of the second light path of reflection; Described half-wave plate, is arranged in the second light path bonding with double light path polarization splitting prism exit facet, inclined for the second linearly polarized light is converted to First Line polarized light; Described reflecting element, is arranged on the First Line polarized light from half-wave plate outgoing leads by the second light path the first light path and the first inclined line of the first light path light that shakes and overlaps; Described focusing lens group, is arranged in the first light path after double light path polarization splitting prism exit facet, at the different projector distance of different environmental modulation; Described focusing lens group is made up of the first lens and the second lens, and described first lens are plano-convex lens, and described second lens are plano-concave lens; Described single box liquid crystal light valve, is arranged in the light path that the first light path overlaps with the second light path, First Line polarized light is modulated into left circularly polarized light and right-circularly polarized light alternate frame; Described receiving screen, for receiving circularly polarized light alternate frame that the left-handed and dextrorotation after the modulation of single box liquid crystal light valve replaces and reflecting.

7. double light path stereo projection system according to claim 6, is characterized in that, described reflecting element is plane mirror or the prism with the effect of reflection image rotation; Described reflecting element angle of inclination size is adjustable, according to different projector distances, regulates different angles of inclination.

8. the double light path stereo projection system containing single box liquid crystal light valve described in the arbitrary claim of claim 1-4, it is characterized in that, comprise projector, double light path polarization splitting prism, reflecting element, focusing lens group, first single box liquid crystal light valve, the second single box liquid crystal light valve and receiving screen; Half-wave plate is provided with before the polaroid of wherein second single box liquid crystal light valve;

Wherein, double light path polarization splitting prism is placed in projector emitting light path, the random polarization picture signal light that projector projects goes out by double light path polarization splitting prism is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and reflected light path is the second light path; The focusing lens group that first lens and the second lens form is positioned in the first light path, for regulating the projector distance in different projection environment; After first liquid crystal light valve is positioned over the second lens of the first light path, the First Line polarized light from lens outgoing is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; Reflecting element is positioned in the second light path, and the second linearly polarized light is turned to the first optical path direction; Second liquid crystal light valve is positioned in the second light path, and after being placed in reflecting element, for the second linearly polarized light being converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen is positioned over described two single box liquid crystal light valves, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.

9. three light path stereo projection systems containing single box liquid crystal light valve described in the arbitrary claim of claim 1-4, it is characterized in that, comprise projector, three light path polarization splitting prisms, the first half-wave plate, the second half-wave plate, the first reflecting element, the second reflecting element, focusing lens group, single box liquid crystal light valve and receiving screen;

Wherein, described projector, for projecting sequential chart as random polarization flashlight; Described three light path polarization splitting prisms, after being arranged at projector, the sequential chart gone out by projector projects is divided into the First Line polarized light of the first light path of transmission as random polarization flashlight, second linearly polarized light of the second light path of reflection and the second linearly polarized light of the 3rd light path, second light path is identical with the polarization state of the linearly polarized light of the 3rd light path, is all the second linearly polarized light; Described three light path polarization splitting prisms are provided with four logical light faces, and described four logical light faces are respectively, the plane of incidence, the first exit facet, the second exit facet and the 3rd exit facet; Described first half-wave plate and the second half-wave plate, be arranged in the second light path and the 3rd light path respectively, be bonded in described three light path polarization splitting prisms respectively second leads on light face exit facet and threeway light face exit facet, respectively the second linearly polarized light of the second light path and the 3rd light path is modulated into First Line polarized light; Described first half-wave plate exit facet and the second half-wave plate exit facet post anti-reflection film respectively; Described first reflecting element and the second reflecting element, be arranged in the second light path and the 3rd light path respectively, and lead the second light path polarized light and the 3rd light path polarized light the first light path respectively respectively, overlaps with the first light path polarized light; Described focusing lens group, is arranged in the first light path after three light path polarization splitting prism exit facets, at the different projector distance of different environmental modulation; Described focusing lens group is made up of the first lens and the second lens, and described first lens are plano-convex lens, and described second lens are plano-concave lens; Described single box liquid crystal light valve, is arranged in the light path of the first light path, the second light path and the 3rd light path coincidence, First Line polarized light is modulated into the left-handed circularly polarized light replaced with dextrorotation; Described left circularly polarized light and described right-circularly polarized light alternate frame project described receiving screen.

10. three light path stereo projection systems containing single box liquid crystal light valve described in the arbitrary claim of claim 1-4, it is characterized in that, comprise projector, three light path polarization splitting prisms, the first reflecting element, the second reflecting element, focusing lens group, first single box liquid crystal light valve, second single box liquid crystal light valve, the 3rd single box liquid crystal light valve and receiving screen; The first half-wave plate and the second half-wave plate is respectively equipped with before the polaroid of wherein second single box liquid crystal light valve and the 3rd single box liquid crystal light valve;

Wherein, three light path polarization splitting prisms are placed in projector emitting light path, the random polarization picture signal light that projector is launched by three light path polarization splitting prisms is divided into the First Line polarized light of transmission and the second linearly polarized light of reflection, wherein transmitted light path is the first light path, and two-way reflected light path is respectively the second light path and the 3rd light path; The focusing lens group that first lens and the second lens form is positioned in the first light path, for regulating the projector distance in different projection environment; First reflecting element is positioned in the second light path, and the second reflecting element is positioned in the 3rd light path, the first reflecting element and the second reflecting element respectively by its second linearly polarized light in the optical path turn to the first light path; First single box liquid crystal light valve is positioned in the first light path after the second lens, First Line polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; Second liquid crystal light valve is positioned in the second light path after the first reflecting element, the second linearly polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; 3rd single box liquid crystal light valve to be positioned in the 3rd light path after the second reflecting element, the second linearly polarized light is converted to the alternate frame of left circularly polarized light and right-circularly polarized light; After receiving screen is positioned over three single box liquid crystal light valves, for receiving and reflecting the alternate frame of left circularly polarized light and right-circularly polarized light.