CN103941535A - Stereo projection system - Google Patents
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- CN103941535A CN103941535A CN201310024991.2A CN201310024991A CN103941535A CN 103941535 A CN103941535 A CN 103941535A CN 201310024991 A CN201310024991 A CN 201310024991A CN 103941535 A CN103941535 A CN 103941535A
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Abstract
The invention discloses a stereo projection system which comprises a projector, a liquid crystal cell structure and a pair of linear polarizing glasses. The liquid crystal cell structure comprises an electric field controller and a polaroid, a drive liquid crystal cell and a compensation liquid crystal cell which are arranged successively along the light transmission direction, and the drive liquid crystal cell and the compensation liquid crystal cell include the same liquid crystal layers. The electric field controller provides a first voltage to the drive liquid crystal cell and a second voltage to the compensation liquid crystal cell, and each work period of the electric field controller can be divided into three continuous time periods, wherein in the first time period, the first and second voltages are both high levels; in the second time period, the first and second voltages are both low levels; and in the third time period, the first voltage is high level and the second voltage is low level. According to the scheme, the stereo projection system uses the compensation liquid crystal box to compensate birefringence and time delay effect of the liquid crystal layer of the drive liquid crystal cell, thereby improving image display effect.
Description
Technical field
The present invention relates to display technique field, relate in particular to a kind of stereo projection system.
Background technology
The twisted-nematic TN type liquid crystal layer using in display technique at present or super twisted nematic type STN type liquid crystal layer boost in process and have birefringence and time delay effect applying electric field, make the image showing produce colour cast and ghost phenomena.Wherein, super twisted nematic type STN type liquid crystal layer birefringence effect is particularly serious, has the dispersion of light when showing, when added electric field not, super twisted nematic type STN type liquid crystal display is color slightly, such as with yellow or blue.Above-mentioned phenomenon can reduce the display effect of display device.
Therefore, be necessary to provide a kind of stereo projection system to solve the problems of the technologies described above.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of liquid crystal cell structure, projector and stereo projection system.
The first technical scheme that the present invention adopts is to provide a kind of liquid crystal cell structure, comprising:
Control device of electric field and the polaroid, driving liquid crystal cell and the compensation liquid crystal cell that along light direction of transfer, are arranged in order setting;
Described polaroid, for seeing through the light parallel with its light transmission shaft direction, obtains First Line polarized light;
Incidence surface and the polaroid of described driving liquid crystal cell are bonding, and the exiting surface of described driving liquid crystal cell is bonding with compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with compensation liquid crystal cell;
Described control device of electric field is for providing the first voltage, providing second voltage to compensation liquid crystal cell to driving liquid crystal cell, each work period of described control device of electric field can be divided into three continuous time periods, described three continuous time periods are followed successively by very first time section, the second time period and the 3rd time period, in very first time section, described the first voltage and second voltage are all high level, within the second time period, the first voltage and second voltage are all low level, within the 3rd time period, the first voltage is high level and second voltage is low level;
Wherein, on driving liquid crystal cell and when compensation liquid crystal cell is in high level together, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, drive liquid crystal cell and drive the voltage on liquid crystal cell and compensation liquid crystal cell by high level, to be dropped in low level process gradually, drive liquid crystal cell and compensate liquid crystal cell contrary and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, drive the voltage on liquid crystal cell and compensate liquid crystal cell while being in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to the second linearly polarized light of First Line polarized light, the second linearly polarized light becomes via compensation liquid crystal cell the 3rd linearly polarized light that polarization direction is parallel to First Line polarized light, while driving liquid crystal cell to compensate liquid crystal cell in low level in high level, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, then First Line polarized light becomes polarization direction perpendicular to the 4th linearly polarized light of First Line polarized light via compensation liquid crystal cell.
Wherein, described driving liquid crystal cell comprises the first conductive layer, the first liquid crystal layer, the second conductive layer and the first glass plate being arranged in parallel successively along the direction of transfer of First Line polarized light, described the first conductive layer and the second conductive layer are transparency conducting layer, and described the first conductive layer and the second conductive layer and the first liquid crystal layer are bonding, described the second conductive layer and the first glass plate are bonding; Described compensation liquid crystal cell comprises the second glass plate, the 3rd conductive layer, the second liquid crystal layer and the 4th conductive layer being arranged in parallel successively along the beam projecting direction that drives liquid crystal cell, described the 3rd conductive layer and the 4th conductive layer are transparency conducting layer, and described the 3rd conductive layer and the 4th conductive layer and the second liquid crystal layer are bonding, described the 3rd conductive layer and the second glass plate are bonding.
Wherein, described driving liquid crystal cell further comprises the 3rd glass plate, described First Line polarized light incides on the first conductive layer after seeing through the 3rd glass plate, the plane of incidence of the exit facet of the 3rd glass plate and the first conductive layer is bonding, described compensation liquid crystal cell further comprises the 4th glass plate, from the light of described the 4th conductive layer outgoing, through the 4th glass plate outgoing, the exit facet of the plane of incidence of described the 4th glass plate and the 4th conductive layer is bonding.
Wherein, described the first conductive layer, the second conductive layer, the 3rd conductive layer and the 4th conductive layer comprise tin indium oxide ITO conductive layer.
Wherein, described the first liquid crystal layer and the second liquid crystal layer comprise: super twisted nematic STN type liquid crystal layer, when described control device of electric field does not provide electric field to super twisted nematic STN type liquid crystal layer, incide linearly polarized light change of polarized direction 270 degree of described super twisted nematic STN type liquid crystal layer.
Wherein, described the first liquid crystal layer and the second liquid crystal layer comprise: twisted-nematic TN type liquid crystal layer, when described control device of electric field does not provide electric field to twisted-nematic TN type liquid crystal layer, incides linearly polarized light change of polarized direction 90 degree of described twisted-nematic TN type liquid crystal layer.
In liquid crystal cell structure described in above-mentioned any one, the exiting surface of described compensation liquid crystal cell is provided with phaser, described phaser comprises quarter-wave lengthy motion picture or four/three-wavelength sheet, the slow axes direction of described phaser and the light transmission shaft angular separation of described polaroid are 45 degree or-45 degree, for the linearly polarized light of compensation liquid crystal cell outgoing is changed into left circularly polarized light or right-circularly polarized light.
The second technical scheme that the present invention adopts is to provide a kind of projector, comprising:
Image signal processing equipment, liquid crystal cell structure and projection lens;
Described image signal processing equipment is for synthetic image signal light;
Described liquid crystal cell structure is arranged on the bang path of picture signal light, for picture signal light being changed over to two kinds of different polarized lights;
Described projection lens is used for described two kinds of different polarized light transmissions to projection screen imaging;
Wherein, described liquid crystal cell structure comprises the liquid crystal cell structure described in the first technical scheme any one of the present invention.
Wherein, described image signal processing equipment, comprising: digital light is processed type image signal treatment facility, for synthetic image signal light; Or liquid crystal on silicon type image signal treatment facility, for synthetic image signal light; Or liquid crystal type image signal processing equipment, for synthetic image signal light; Or display device, for synthetic image signal light, described display device comprises TV, computer, projector, navigating instrument, mobile phone, camera.
The 3rd technical scheme that the present invention adopts is to provide a kind of stereo projection system, comprising:
Projector, for projects images signal light to projection screen imaging;
Liquid crystal cell structure, is arranged between projector and projection screen in light path, for described picture signal light is become to two kinds of different linearly polarized lights;
Line polaroid glasses, be arranged on the light transmition path that described projection screen reflexes to, described line polaroid glasses comprise left eyeglass, right eyeglass and frame, described left eyeglass and right eyeglass are arranged on described frame, the light transmission shaft direction of described left eyeglass is parallel from the polarization direction of one of described two kinds of different linear polarization light, and the light transmission shaft direction of described right eyeglass is parallel from the polarization direction of another kind of linearly polarized light in described two kinds of different linear polarization light;
Wherein, described liquid crystal cell structure comprises control device of electric field and the polaroid, driving liquid crystal cell and the compensation liquid crystal cell that along light direction of transfer, are arranged in order setting;
Described polaroid, for seeing through the light parallel with its light transmission shaft direction, obtains First Line polarized light;
Incidence surface and the polaroid of described driving liquid crystal cell are bonding, and the exiting surface of described driving liquid crystal cell is bonding with compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with compensation liquid crystal cell;
Described control device of electric field is for providing the first voltage, providing second voltage to compensation liquid crystal cell to driving liquid crystal cell, each work period of described control device of electric field can be divided into three continuous time periods, described three continuous time periods are followed successively by very first time section, the second time period and the 3rd time period, in very first time section, described the first voltage and second voltage are all high level, within the second time period, the first voltage and second voltage are all low level, within the 3rd time period, the first voltage is high level and second voltage is low level;
Wherein, on driving liquid crystal cell and when compensation liquid crystal cell is in high level together, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, drive liquid crystal cell and drive the voltage on liquid crystal cell and compensation liquid crystal cell by high level, to be dropped in low level process gradually, drive liquid crystal cell and compensate liquid crystal cell contrary and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, drive the voltage on liquid crystal cell and compensate liquid crystal cell while being in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to the second linearly polarized light of First Line polarized light, the second linearly polarized light becomes via compensation liquid crystal cell the 3rd linearly polarized light that polarization direction is parallel to First Line polarized light, while driving liquid crystal cell to compensate liquid crystal cell in low level in high level, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, then First Line polarized light becomes polarization direction perpendicular to the 4th linearly polarized light of First Line polarized light via compensation liquid crystal cell.
The 4th technical scheme that the present invention adopts is to provide a kind of stereo projection system, comprising:
Projector, projector, for projects images signal light to projection screen imaging;
Liquid crystal cell structure, is arranged between projector and projection screen in light path, for described picture signal light is become to left circularly polarized light and right-circularly polarized light;
Rotatory polarization glasses, be arranged on the light transmition path that described projection screen reflexes to, described rotatory polarization glasses comprise left eyeglass, right eyeglass and frame, described left eyeglass and right eyeglass are arranged on described frame, and described left eyeglass comprises: left eyeglass quarter-wave plate and left eyeglass polaroid;
Described left eyeglass quarter-wave plate is for changing left eye linearly polarized light by one of the left circularly polarized light obtaining after described projection screen reflection and right-circularly polarized light;
Described left eyeglass polaroid, for seeing through described left eye linearly polarized light;
Described right eyeglass comprises right eyeglass quarter-wave plate and right eyeglass polaroid;
Described right eyeglass quarter-wave plate is for changing right eye linearly polarized light by the left circularly polarized light obtaining after described projection screen reflection and the another kind of circularly polarized light of right-circularly polarized light;
Described right eyeglass polaroid is for seeing through described right eye linearly polarized light;
The polar orientation irrelevancy of the polar orientation of described left eyeglass polaroid and right eyeglass polaroid is capable;
Wherein, described liquid crystal cell structure comprises control device of electric field and the polaroid, driving liquid crystal cell, compensation liquid crystal cell and quarter-wave or the four/three-wavelength phaser that along light direction of transfer, are arranged in order setting;
Described polaroid, for seeing through the light parallel with its light transmission shaft direction, obtains First Line polarized light;
Incidence surface and the polaroid of described driving liquid crystal cell are bonding, and the exiting surface of described driving liquid crystal cell is bonding with compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with compensation liquid crystal cell;
Described control device of electric field is for providing the first voltage, providing second voltage to compensation liquid crystal cell to driving liquid crystal cell, each work period of described control device of electric field can be divided into three continuous time periods, described three continuous time periods are followed successively by very first time section, the second time period and the 3rd time period, in very first time section, described the first voltage and second voltage are all high level, within the second time period, the first voltage and second voltage are all low level, within the 3rd time period, the first voltage is high level and second voltage is low level;
Wherein, on driving liquid crystal cell and when compensation liquid crystal cell is in high level together, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, drive liquid crystal cell and drive the voltage on liquid crystal cell and compensation liquid crystal cell by high level, to be dropped in low level process gradually, drive liquid crystal cell and compensate liquid crystal cell contrary and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, drive the voltage on liquid crystal cell and compensate liquid crystal cell while being in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to the second linearly polarized light of First Line polarized light, the second linearly polarized light becomes via compensation liquid crystal cell the 3rd linearly polarized light that polarization direction is parallel to First Line polarized light, while driving liquid crystal cell to compensate liquid crystal cell in low level in high level, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, then First Line polarized light becomes polarization direction perpendicular to the 4th linearly polarized light of First Line polarized light via compensation liquid crystal cell.
Described phaser is arranged at going out on light path of liquid crystal cell structure, the slow axes direction of described phaser and the light transmission shaft angular separation of described polaroid are 45 degree or-45 degree, for the linearly polarized light of compensation liquid crystal cell outgoing is changed into left circularly polarized light or right-circularly polarized light.
By the way, a kind of liquid crystal cell structure provided by the invention and the projector and the stereo projection system that comprise described liquid crystal cell structure, by employing, compensate liquid crystal cell and compensate birefringence and the time delay effect that drives liquid crystal layer in liquid crystal cell, can improve the display effect of image.
Accompanying drawing explanation
Fig. 1 is the simplified structure schematic diagram of the first embodiment of liquid crystal cell structure of the present invention;
Fig. 2 is the detailed structure schematic diagram of liquid crystal cell structure in Fig. 1;
Fig. 3 is the simplified structure schematic diagram of the second embodiment of liquid crystal cell structure of the present invention;
Fig. 4 is the structural representation of the first embodiment of projector of the present invention;
Fig. 5 is the structural representation of the second embodiment of projector of the present invention;
Fig. 6 is the structural representation of the first embodiment of stereo projection system of the present invention;
Fig. 7 is the structural representation of the second embodiment of stereo projection system of the present invention;
Fig. 8 is the principle of work schematic diagram of the liquid crystal cell structure shown in Fig. 1.
Embodiment
Refer to Fig. 1, Fig. 1 is the simplified structure schematic diagram of the first embodiment of liquid crystal cell structure of the present invention.As shown in Figure 1, the liquid crystal cell structure 10 of the present embodiment comprises control device of electric field (not shown) and the polaroid 11, driving liquid crystal cell 12 and the compensation liquid crystal cell 13 that along light direction of transfer, are arranged in order setting.Wherein, drive incidence surface and the polaroid 11 of liquid crystal cell 12 bonding, the exiting surface of described driving liquid crystal cell 12 is bonding with compensation liquid crystal cell 13, and described driving liquid crystal cell 12 is drawn together identical liquid crystal layer with compensation liquid crystal cell bag 13.
In the present embodiment, described polaroid 11, for seeing through the light parallel with its light transmission shaft direction, obtains First Line polarized light, and First Line polarized light enters to inject to drive liquid crystal cell 12.The polarization direction that drives liquid crystal cell 12 whether to change First Line polarized light need to be determined according to the duty of control device of electric field.
Described control device of electric field is for providing the first voltage to driving liquid crystal cell 12, to compensation liquid crystal cell 13, provide second voltage, each work period T of described control device of electric field can be divided into three continuous time periods, described three continuous time periods are followed successively by very first time section 0-t1, the second time period t 1-t2 and the 3rd time period t 2-t3, in very first time section 0-t1, described the first voltage and second voltage are all high level, in the second time period t 1-t2, the first voltage and second voltage are all low level, in the 3rd time t2-t3 section, the first voltage is high level and second voltage is low level.In the present embodiment, on driving liquid crystal cell 12 and when compensation liquid crystal cell 13 is in high level together, First Line polarized light directly sees through and drives liquid crystal cell 12 directly to see through compensation liquid crystal cell 13 again, drive liquid crystal cell 12 and drive the voltage on liquid crystal cell 12 and compensation liquid crystal cell 13 by high level, to be dropped in low level process gradually, drive liquid crystal cell 12 and compensate that the sense of rotation of polarization direction of 13 pairs of linearly polarized lights of liquid crystal cell is contrary and the anglec of rotation is identical, drive the voltage on liquid crystal cell 12 and compensate liquid crystal cell 13 while being in low level together, from driving liquid crystal cell 12 outgoing polarization directions perpendicular to the second linearly polarized light of First Line polarized light, the second linearly polarized light becomes via compensation liquid crystal cell 13 the 3rd linearly polarized light that polarization direction is parallel to First Line polarized light, while driving liquid crystal cell 12 to compensate liquid crystal cell 13 in low level in high level, First Line polarized light directly sees through and drives liquid crystal cell 12 directly to see through compensation liquid crystal cell 13 again, then First Line polarized light becomes polarization direction perpendicular to the 4th linearly polarized light of First Line polarized light via compensation liquid crystal cell 13.
When drive that liquid crystal cell 12 and compensation liquid crystal cell adopt be TN type liquid crystal time, refer to Fig. 8, Fig. 8 is the principle of work schematic diagram of the liquid crystal cell structure shown in Fig. 1.As shown in Figure 8, Fig. 8 (A) is the time dependent schematic diagram of institute's making alive that drives liquid crystal cell 12, Fig. 8 (B) is the time dependent schematic diagram of institute's making alive of compensation liquid crystal cell 13, Fig. 8 (C) is that the voltage shown in Fig. 8 (A) is added on and while driving the compensation liquid crystal cell 13 shown in liquid crystal cell 12 and Fig. 8 (B) to be added on compensation liquid crystal cell, drives the windup-degree schematic diagram of liquid crystal cell to linearly polarized light, Fig. 8 (D) is that the voltage shown in Fig. 8 (A) is added on the windup-degree schematic diagram that compensates 13 pairs of linearly polarized lights of liquid crystal cell while driving the compensation liquid crystal cell 13 shown in liquid crystal cell 12 and Fig. 8 (B) to be added on compensation liquid crystal cell, Fig. 8 (E) is the schematic diagram with Fig. 8 (C) polarization direction anglec of rotation of the linearly polarized light of synchronous corresponding incident on the time.Wherein, the representative of horizontal bidirectional arrow in Fig. 8 (E) is from the polarization direction of the linearly polarized light of compensation liquid crystal cell 13 outgoing perpendicular to the polarization direction of First Line polarized light, and the four-headed arrow representative of vertical direction is parallel to the polarization direction of First Line polarized light from the polarization direction of the linearly polarized light of compensation liquid crystal cell 13 outgoing.
Therefore, the liquid crystal cell structure 10 of the present embodiment alternately outgoing polarization direction is parallel to the linearly polarized light of First Line polarized light and polarization direction perpendicular to the polarized light of First Line polarized light, and adopts the voltage delay effect that drives liquid crystal cell 12 and compensation liquid crystal cell 13 structures can effective compensation to drive liquid crystal cell 12.
Refer to Fig. 2, Fig. 2 is the detailed structure schematic diagram of liquid crystal cell structure in Fig. 1.As shown in Figure 2, described driving liquid crystal cell 12 comprises the first conductive layer 121, the first liquid crystal layer 122, the second conductive layer 123 and the first glass plate 124 being arranged in parallel successively along the direction of transfer of First Line polarized light, described the first conductive layer 121 and the second conductive layer 123 are transparency conducting layer, and described the first conductive layer 121 and the second conductive layer 123 and the first liquid crystal layer 123 are bonding, described the second conductive layer 123 and the first glass plate 124 are bonding; Described compensation liquid crystal cell 13 comprises the second glass plate 131, the 3rd conductive layer 132, the second liquid crystal layer 133 and the 4th conductive layer 134 being arranged in parallel successively along the beam projecting direction that drives liquid crystal cell 12, described the 3rd conductive layer 132 and the 4th conductive layer 134 are transparency conducting layer, and described the 3rd conductive layer 132 and the 4th conductive layer 134 and the second liquid crystal layer 133 are bonding, described the 3rd conductive layer 132 and the second glass plate 131 are bonding.This kind of situation, described the first Polarizer 11 and the first conductive layer 121 are bonding, the first glass plate 124 and the second glass plate 131 are bonding, and in other embodiment of liquid crystal cell structure 10, described the first glass plate 124 and the second glass plate 131 also can adopt the mode of fixed intervals to arrange certainly.
In other embodiment of liquid crystal cell structure 10 of the present invention, described the first glass plate 124 and the second glass plate 131 also can be substituted by a glass plate, and the second conductive layer 123 and the 3rd conductive layer 132 are bonded on same glass plate.
Please with further reference to Fig. 2, in another embodiment of liquid crystal cell structure 10 of the present invention, described driving liquid crystal cell 12 further comprises the 3rd glass plate 125, described First Line polarized light incides on the first conductive layer 121 after seeing through the 3rd glass plate 125, the plane of incidence of the exit facet of the 3rd glass plate 125 and the first conductive layer 121 is bonding, described compensation liquid crystal cell 13 further comprises the 4th glass plate 135, from the light of described the 4th conductive layer 134 outgoing through the 4th glass plate 135 outgoing, the exit facet of the plane of incidence of described the 4th glass plate 135 and the 4th conductive layer 134 is bonding.
Please with further reference to Fig. 2, the voltage swing that described driving liquid crystal cell 12 and described compensation liquid crystal cell 13 apply equates, polarity is contrary, particularly, and as shown in Figure 2, the first conductive layer 121 polarity are for just, the second conductive layer 123 polarity are for negative, and the electric potential difference between the first conductive layer 121 and the second conductive layer 123 is u, and the 3rd conductive layer 132 polarity are for negative, the 4th conductive layer 134 polarity are being for just, and electric potential difference between the 3rd conductive layer 132 and the 4th conductive layer 134 is-u.Certainly, the electric potential difference between the first conductive layer 121 and the second conductive layer 123 can be also-u, and electric potential difference between the 3rd conductive layer 132 and the 4th conductive layer 134 is u, and this situation is also within protection scope of the present invention.
In a preferred embodiment of liquid crystal cell structure of the present invention, described the first conductive layer 121, the second conductive layer 123, the 3rd conductive layer 131 and the 4th conductive layer 134 comprise tin indium oxide ITO conductive layer, can certainly adopt other conductive materials with identical functions to substitute.
The first liquid crystal layer 122 described in a preferred embodiment of the present invention and the second liquid crystal layer 133 comprise: twisted-nematic TN type liquid crystal layer, when described control device of electric field does not provide electric field to twisted-nematic TN type liquid crystal layer, incide linearly polarized light change of polarized direction 90 degree of described twisted-nematic TN type liquid crystal layer.The first liquid crystal layer 122 described in another preferred embodiment of the present invention and the second liquid crystal layer 133 comprise: super twisted nematic STN type liquid crystal layer, when described control device of electric field does not provide electric field to super twisted nematic STN type liquid crystal layer, incide linearly polarized light change of polarized direction 270 degree of described super twisted nematic STN type liquid crystal layer.In applying the process of electric field, there is birefringence and time delay effect in described twisted-nematic TN type liquid crystal layer and super twisted nematic STN type liquid crystal layer, can affect the display effect of display frame, therefore, adopt the scheme of the Double liquid crystal box of liquid crystal cell structure of the present invention can compensate this birefringence and time delay effect, improve the display effect of display device.
Refer to Fig. 3, Fig. 3 is the simplified structure schematic diagram of the second embodiment of liquid crystal cell structure of the present invention.As shown in Figure 3, the liquid crystal cell structure 20 of the present embodiment comprises control device of electric field and the polaroid 11, driving liquid crystal cell 12, compensation liquid crystal cell 13 and quarter-wave phaser or the four/three-wavelength phaser 14 that along light direction of transfer, are arranged in order setting.
Liquid crystal cell structure 10 shown in Fig. 3 is with the difference of the liquid crystal cell structure 20 shown in Fig. 1: the bright dipping side of the compensation liquid crystal cell 13 of liquid crystal cell structure 20 further comprises a quarter-wave phaser or four/three-wavelength phaser 14, described phaser 14 comprises quarter-wave lengthy motion picture or four/three-wavelength sheet, the slow axes direction of described phaser 14 and the light transmission shaft angular separation of described polaroid 11 are 45 degree or-45 degree, for the linearly polarized light of compensation liquid crystal cell 13 outgoing is changed into left circularly polarized light or right-circularly polarized light, therefore in Fig. 2, the emergent ray of liquid crystal cell structure 20 is left circularly polarized light or right-circularly polarized light.
In the second embodiment of liquid crystal cell structure of the present invention, alternately the control device of electric field in the first duty and the second duty makes liquid crystal cell structure 20 alternately produce left circularly polarized light and right-circularly polarized light.
Refer to Fig. 4, Fig. 4 is the structural representation of the first embodiment of projector of the present invention.As shown in Figure 4, the projector 30 of the present embodiment comprises: image signal processing equipment (not sign), liquid crystal cell structure and projection lens (not indicating).Wherein, described image signal processing equipment is for synthetic image signal light.What described liquid crystal cell structure adopted is the structure of the liquid crystal cell structure 10 shown in Fig. 1, described liquid crystal cell structure is arranged on the bang path of picture signal light, for picture signal light is changed over to two kinds of different polarized lights, be specially polarization direction and be parallel to the axial linearly polarized light of printing opacity of polaroid 11 and polarization direction perpendicular to the axial linearly polarized light of printing opacity of polaroid 11.Described polarization direction is parallel to the axial linearly polarized light of printing opacity of polaroid 11 and polarization direction and alternately incides projection lens and be transmitted through screen imaging through projection lens perpendicular to the axial linearly polarized light of printing opacity of polaroid 11.
In the concrete application of the present embodiment, user can coordinate the projector 30 of the present embodiment to watch 3D projected image effect by wearing line polaroid glasses.
Refer to Fig. 5, Fig. 5 is the structural representation of the second embodiment of projector of the present invention.Shown in Fig. 5, the projector 40 of the present embodiment comprises: image signal processing equipment (not sign), liquid crystal cell structure and projection lens (not indicating).Wherein, described image signal processing equipment is for synthetic image signal light.What described liquid crystal cell structure adopted is the structure of the liquid crystal cell structure 20 shown in Fig. 3, described liquid crystal cell structure is arranged on the bang path of picture signal light, for picture signal light is changed over to two kinds of different polarized lights, specifically comprise left circularly polarized light and right-circularly polarized light.The left circularly polarized light alternately producing in the engineering of described liquid crystal cell structure 20 work and right-circularly polarized light alternately incide to projection lens and through projection lens projects to projection screen imaging.
In the concrete application of the present embodiment, user can coordinate the projector 40 of the present embodiment to watch 3D projected image effect by wearing rotatory polarization glasses.
Wherein, in the concrete application of projector of the present invention, the image signal processing equipment that the projector 40 shown in the projector 30 shown in Fig. 4 and Fig. 5 comprises, comprising: digital light is processed type image signal treatment facility, for synthetic image signal light; Or liquid crystal on silicon type image signal treatment facility, for synthetic image signal light; Or liquid crystal type image signal processing equipment, for synthetic image signal light; Or display device, for synthetic image signal light, described display device comprises TV, computer, projector, navigating instrument, mobile phone, camera.
Refer to Fig. 6, Fig. 6 is the structural representation of the first embodiment of stereo projection system of the present invention.As shown in Figure 6, the stereo projection system 50 of the present embodiment comprises: projector, liquid crystal cell structure and line polaroid glasses (not shown).Wherein, projector is used for projects images signal light to projection screen imaging; Liquid crystal cell structure is arranged between projector and projection screen in light path, for described picture signal light is become to two kinds of different linearly polarized lights; Line polaroid glasses are arranged on the light transmition path that described projection screen reflexes to, described line polaroid glasses comprise left eyeglass, right eyeglass and frame, described left eyeglass and right eyeglass are arranged on described frame, the light transmission shaft direction of described left eyeglass is parallel from the polarization direction of one of described two kinds of different linear polarization light, and the light transmission shaft direction of described right eyeglass is parallel from the polarization direction of another kind of linearly polarized light in described two kinds of different linear polarization light.
In the present embodiment, what described liquid crystal cell structure adopted is the technical scheme of the liquid crystal cell structure 10 of the first embodiment of the present invention shown in Fig. 1, the structure of described liquid crystal cell structure 10 and principle of work have provided detailed description in the first embodiment of the present invention, do not repeat them here.
Refer to Fig. 7, Fig. 7 is the structural representation of the second embodiment of stereo projection system of the present invention.As shown in Figure 7, the stereo projection system 60 of the present embodiment comprises: projector, liquid crystal cell structure and rotatory polarization glasses (not shown).Wherein, projector is used for projects images signal light to projection screen imaging; Liquid crystal cell structure is arranged between projector and projection screen in light path, for described picture signal light is become to left circularly polarized light and right-circularly polarized light; Rotatory polarization glasses are arranged on the light transmition path that described projection screen reflexes to, described rotatory polarization glasses comprise left eyeglass, right eyeglass and frame, described left eyeglass and right eyeglass are arranged on described frame, and described left eyeglass comprises: left eyeglass quarter-wave plate and left eyeglass polaroid; Described left eyeglass quarter-wave plate is for changing left eye linearly polarized light by one of the left circularly polarized light obtaining after described projection screen reflection and right-circularly polarized light; Described left eyeglass polaroid, for seeing through described left eye linearly polarized light; Described right eyeglass comprises right eyeglass quarter-wave plate and right eyeglass polaroid; Described right eyeglass quarter-wave plate is for changing right eye linearly polarized light by the left circularly polarized light obtaining after described projection screen reflection and the another kind of circularly polarized light of right-circularly polarized light; Described right eyeglass polaroid is for seeing through described right eye linearly polarized light; The polar orientation irrelevancy of the polar orientation of described left eyeglass polaroid and right eyeglass polaroid is capable.
In the present embodiment, what described liquid crystal cell structure adopted is the technical scheme of the liquid crystal cell structure 20 of the second embodiment of the present invention shown in Fig. 3, the structure of described liquid crystal cell structure 20 and principle of work have provided detailed description in the first embodiment of the present invention, do not repeat them here.
In application, user, by the stereo projection system of the present invention 50 shown in Fig. 6 and the stereo projection system 60 shown in Fig. 7, can realize the object of watching 3D projected image particularly.
By the way, liquid crystal cell structure provided by the invention and comprise projector and the stereo projection system of described liquid crystal cell structure, by employing, compensate liquid crystal cell and compensate birefringence and the time delay effect that drives liquid crystal layer in liquid crystal cell, can improve the display effect of image.
For liquid crystal cell structure of the present invention, the projector that comprises described liquid crystal cell structure and stereo projection system, the form of realization is diversified.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a stereo projection system, is characterized in that, comprising:
Projector, for projects images signal light to projection screen imaging;
Liquid crystal cell structure, is arranged between projector and projection screen in light path, for described picture signal light is become to two kinds of different linearly polarized lights;
Line polaroid glasses, be arranged on the light transmition path that described projection screen reflexes to, described line polaroid glasses comprise left eyeglass, right eyeglass and frame, described left eyeglass and right eyeglass are arranged on described frame, the light transmission shaft direction of described left eyeglass is parallel from the polarization direction of one of described two kinds of different linear polarization light, and the light transmission shaft direction of described right eyeglass is parallel from the polarization direction of another kind of linearly polarized light in described two kinds of different linear polarization light;
Wherein, described liquid crystal cell structure comprises control device of electric field and the polaroid, driving liquid crystal cell and the compensation liquid crystal cell that along light direction of transfer, are arranged in order setting;
Described polaroid, for seeing through the light parallel with its light transmission shaft direction, obtains First Line polarized light;
Incidence surface and the polaroid of described driving liquid crystal cell are bonding, and the exiting surface of described driving liquid crystal cell is bonding with compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with compensation liquid crystal cell;
Described control device of electric field is for providing the first voltage, providing second voltage to compensation liquid crystal cell to driving liquid crystal cell, each work period of described control device of electric field can be divided into three continuous time periods, described three continuous time periods are followed successively by very first time section, the second time period and the 3rd time period, in very first time section, described the first voltage and second voltage are all high level, within the second time period, the first voltage and second voltage are all low level, within the 3rd time period, the first voltage is high level and second voltage is low level;
Wherein, on driving liquid crystal cell and when compensation liquid crystal cell is in high level together, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, drive liquid crystal cell and drive the voltage on liquid crystal cell and compensation liquid crystal cell by high level, to be dropped in low level process gradually, drive liquid crystal cell and compensate liquid crystal cell contrary and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, drive the voltage on liquid crystal cell and compensate liquid crystal cell while being in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to the second linearly polarized light of First Line polarized light, the second linearly polarized light becomes via compensation liquid crystal cell the 3rd linearly polarized light that polarization direction is parallel to First Line polarized light, while driving liquid crystal cell to compensate liquid crystal cell in low level in high level, First Line polarized light directly sees through and drives liquid crystal cell directly to see through compensation liquid crystal cell again, then First Line polarized light becomes polarization direction perpendicular to the 4th linearly polarized light of First Line polarized light via compensation liquid crystal cell.
2. liquid crystal cell structure according to claim 1, it is characterized in that, described driving liquid crystal cell comprises the first conductive layer, the first liquid crystal layer, the second conductive layer and the first glass plate being arranged in parallel successively along the direction of transfer of First Line polarized light, described the first conductive layer and the second conductive layer are transparency conducting layer, and described the first conductive layer and the second conductive layer and the first liquid crystal layer are bonding, described the second conductive layer and the first glass plate are bonding; Described compensation liquid crystal cell comprises the second glass plate, the 3rd conductive layer, the second liquid crystal layer and the 4th conductive layer being arranged in parallel successively along the beam projecting direction that drives liquid crystal cell, described the 3rd conductive layer and the 4th conductive layer are transparency conducting layer, and described the 3rd conductive layer and the 4th conductive layer and the second liquid crystal layer are bonding, described the 3rd conductive layer and the second glass plate are bonding.
3. liquid crystal cell structure according to claim 2, it is characterized in that, described driving liquid crystal cell further comprises the 3rd glass plate, described First Line polarized light incides on the first conductive layer after seeing through the 3rd glass plate, the plane of incidence of the exit facet of the 3rd glass plate and the first conductive layer is bonding, described compensation liquid crystal cell further comprises the 4th glass plate, from the light of described the 4th conductive layer outgoing, through the 4th glass plate outgoing, the exit facet of the plane of incidence of described the 4th glass plate and the 4th conductive layer is bonding.
4. liquid crystal cell structure according to claim 2, is characterized in that, described the first conductive layer, the second conductive layer, the 3rd conductive layer and the 4th conductive layer comprise tin indium oxide ITO conductive layer.
5. liquid crystal cell structure according to claim 2, it is characterized in that, described the first liquid crystal layer and the second liquid crystal layer comprise: super twisted nematic STN type liquid crystal layer, when described control device of electric field does not provide electric field to super twisted nematic STN type liquid crystal layer, incide linearly polarized light change of polarized direction 270 degree of described super twisted nematic STN type liquid crystal layer.
6. liquid crystal cell structure according to claim 2, it is characterized in that, described the first liquid crystal layer and the second liquid crystal layer comprise: twisted-nematic TN type liquid crystal layer, when described control device of electric field does not provide electric field to twisted-nematic TN type liquid crystal layer, incide linearly polarized light change of polarized direction 90 degree of described twisted-nematic TN type liquid crystal layer.
7. according to the liquid crystal cell structure described in claim 1-6 any one, it is characterized in that, the exiting surface of described compensation liquid crystal cell is provided with phaser, described phaser comprises quarter-wave lengthy motion picture or four/three-wavelength sheet, the slow axes direction of described phaser and the light transmission shaft angular separation of described polaroid are 45 degree or-45 degree, for the linearly polarized light of compensation liquid crystal cell outgoing is changed into left circularly polarized light or right-circularly polarized light.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107392647A (en) * | 2017-06-27 | 2017-11-24 | 上海悉德信息科技有限公司 | Flow media advertisement timesharing distributes jettison system |
| CN110660371A (en) * | 2019-09-30 | 2020-01-07 | 青岛海信电器股份有限公司 | Liquid crystal module display correction method and device |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107392647A (en) * | 2017-06-27 | 2017-11-24 | 上海悉德信息科技有限公司 | Flow media advertisement timesharing distributes jettison system |
| CN110660371A (en) * | 2019-09-30 | 2020-01-07 | 青岛海信电器股份有限公司 | Liquid crystal module display correction method and device |
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Application publication date: 20140723 |