CN203178634U - Liquid crystal box structure - Google Patents
Liquid crystal box structure Download PDFInfo
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- CN203178634U CN203178634U CN2013200355828U CN201320035582U CN203178634U CN 203178634 U CN203178634 U CN 203178634U CN 2013200355828 U CN2013200355828 U CN 2013200355828U CN 201320035582 U CN201320035582 U CN 201320035582U CN 203178634 U CN203178634 U CN 203178634U
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Abstract
The utility model discloses a liquid crystal box structure. The liquid crystal box structure comprises an electric field controller, a Polaroid, a drive liquid crystal box and a compensation liquid crystal box, wherein the Polaroid, the drive liquid crystal box and the compensation liquid crystal box are sequentially arranged in the light transmitting direction. The drive liquid crystal box and the compensation liquid crystal box comprise the same liquid crystal layer. The electric field controller is used for supplying a first voltage to the drive liquid crystal box and supplying a second voltage to the compensation liquid crystal box. Every work period of the electric field controller can be divided into three continuous periods of time, wherein both the first voltage and the second voltage are high levels during a first period of time, and are low levels during a second period of time, and the first voltage is a high level and the second voltage is a low level during a third period of time. Therefore, the birefringence and the time delay effect of the liquid crystal layer in the drive liquid crystal box are compensated by the compensation liquid crystal box, and accordingly the liquid crystal box structure can improve the display effect of images.
Description
Technical field
The utility model relates to the display technique field, relates in particular to a kind of liquid crystal cell structure.
Background technology
At present employed twisted-nematic TN type liquid crystal layer or super twisted nematic type STN type liquid crystal layer boost and have birefringence and time delay effect in the process applying electric field in the display technique, make the image that shows produce colour cast and ghost phenomena.Wherein, super twisted nematic type STN type liquid crystal layer birefringence effect is particularly serious, has the chromatic dispersion of light when showing, when added electric field not, super twisted nematic type STN type LCD is color slightly, such as having yellow or blueness.Above-mentioned phenomenon can reduce the display effect of display device.
Therefore, be necessary to provide a kind of liquid crystal cell structure to solve the problems of the technologies described above.
The utility model content
The technical problems to be solved in the utility model provides a kind of liquid crystal cell structure, projector and stereo projection system.
First technical scheme that the utility model adopts provides 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 are arranged in order setting along the light direction of transfer;
Described polaroid is used for seeing through the light parallel with its light transmission shaft direction, obtains first linearly 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 the compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with the compensation liquid crystal cell;
Described control device of electric field is used for first voltage being provided, providing second voltage to the 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, second time period and the 3rd time period, in very first time section, described first voltage and second voltage are all high level, in second time period, first voltage and second voltage are all low level, in the 3rd time period, first voltage is high level and second voltage is low level;
Wherein, drive the voltage on the liquid crystal cell and compensate liquid crystal cell when being in high level together, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, voltage on driving liquid crystal cell and compensation liquid crystal cell is dropped in the low level process gradually by high level, drive liquid crystal cell and compensate liquid crystal cell opposite and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, when the voltage on the voltage on the driving liquid crystal cell and the compensation liquid crystal cell is in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to second linearly polarized light of first linearly polarized light, second linearly polarized light becomes the 3rd linearly polarized light that the polarization direction is parallel to first linearly polarized light via the compensation liquid crystal cell, drive that liquid crystal cell is in high level and when compensating liquid crystal cell and being in low level, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, and first linearly polarized light becomes the polarization direction perpendicular to the 4th linearly polarized light of first linearly polarized light via the compensation liquid crystal cell then.
Wherein, described driving liquid crystal cell comprises first conductive layer, first liquid crystal layer, second conductive layer and first glass plate that is arranged in parallel successively along the direction of transfer of first linearly polarized light, described first conductive layer and second conductive layer are transparency conducting layer, and described first conductive layer and second conductive layer and first liquid crystal layer are bonding, and described second conductive layer and first glass plate are bonding; Described compensation liquid crystal cell comprises second glass plate, the 3rd conductive layer, second liquid crystal layer and the 4th conductive layer that is 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 second liquid crystal layer are bonding, and described the 3rd conductive layer and second glass plate are bonding.
Wherein, described driving liquid crystal cell further comprises the 3rd glass plate, described first linearly polarized light incides on first conductive layer after seeing through the 3rd glass plate, the plane of incidence of the exit facet of the 3rd glass plate and first conductive layer is bonding, described compensation liquid crystal cell further comprises the 4th glass plate, 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 from the light of described the 4th conductive layer outgoing.
Wherein, described first conductive layer, second conductive layer, the 3rd conductive layer and the 4th conductive layer comprise tin indium oxide ITO conductive layer.
Wherein, described first liquid crystal layer and 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 first liquid crystal layer and second liquid crystal layer comprise: when twisted-nematic TN type liquid crystal layer, described control device of electric field do 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.
In above-mentioned any described liquid crystal cell structure, 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, change into left circularly polarized light or right-circularly polarized light for the linearly polarized light that will compensate the liquid crystal cell outgoing.
Second technical scheme that the utility model adopts provides a kind of projector, comprising:
Image signal processing equipment, liquid crystal cell structure and projection lens;
Described image signal processing equipment is used for generating picture signal light;
Described liquid crystal cell structure is arranged on the bang path of picture signal light, is used for picture signal light is changed over two kinds of different polarized lights;
Described projection lens is used for described two kinds of different polarized light transmissions to the projection screen imaging;
Wherein, described liquid crystal cell structure comprises any described liquid crystal cell structure of first technical scheme of the present utility model.
Wherein, described image signal processing equipment comprises: digital light is handled the type image signal treatment facility, is used for generating picture signal light; Or liquid crystal on silicon type image signal treatment facility, be used for generating picture signal light; Or the liquid crystal type image signal processing equipment, be used for generating picture signal light; Or display device, being used for generating picture signal light, described display device comprises TV, computer, projector, navigating instrument, mobile phone, camera.
The 3rd technical scheme that the utility model adopts provides a kind of stereo projection system, comprising:
Projector is used for projects images signal light to the projection screen imaging;
Liquid crystal cell structure is arranged between projector and the projection screen on the light path, is used for described picture signal light is become two kinds of different linearly polarized lights;
The line polaroid glasses, be arranged on the light travel 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 the described frame, the light transmission shaft direction of described left eyeglass is parallel with the polarization direction of one of described two kinds of different linear polarization light, and the polarization direction of the another kind of linearly polarized light in the light transmission shaft direction of described right eyeglass and the described two kinds of different linear polarization light is parallel;
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 are arranged in order setting along the light direction of transfer;
Described polaroid is used for seeing through the light parallel with its light transmission shaft direction, obtains first linearly 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 the compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with the compensation liquid crystal cell;
Described control device of electric field is used for first voltage being provided, providing second voltage to the 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, second time period and the 3rd time period, in very first time section, described first voltage and second voltage are all high level, in second time period, first voltage and second voltage are all low level, in the 3rd time period, first voltage is high level and second voltage is low level;
Wherein, when the voltage on the voltage on the driving liquid crystal cell and the compensation liquid crystal cell is in high level together, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, voltage on driving liquid crystal cell and compensation liquid crystal cell is dropped in the low level process gradually by high level, drive liquid crystal cell and compensate liquid crystal cell opposite and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, when the voltage on the voltage on the driving liquid crystal cell and the compensation liquid crystal cell is in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to second linearly polarized light of first linearly polarized light, second linearly polarized light becomes the 3rd linearly polarized light that the polarization direction is parallel to first linearly polarized light via the compensation liquid crystal cell, drive that liquid crystal cell is in high level and when compensating liquid crystal cell and being in low level, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, and first linearly polarized light becomes the polarization direction perpendicular to the 4th linearly polarized light of first linearly polarized light via the compensation liquid crystal cell then.
The 4th technical scheme that the utility model adopts provides a kind of stereo projection system, comprising:
Projector, projector is used for projects images signal light to the projection screen imaging;
Liquid crystal cell structure is arranged between projector and the projection screen on the light path, is used for described picture signal light is become left circularly polarized light and right-circularly polarized light;
The rotatory polarization glasses, be arranged on the light travel 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 the described frame, and described left eyeglass comprises: left eyeglass quarter-wave plate and left eyeglass polaroid;
Described left eyeglass quarter-wave plate changes the left eye linearly polarized light for one of the left circularly polarized light that will obtain and right-circularly polarized light after described projection screen reflection;
Described left eyeglass polaroid is used 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 changes the right eye linearly polarized light for the left circularly polarized light that will obtain and the another kind of circularly polarized light of right-circularly polarized light after described projection screen reflection;
Described right eyeglass polaroid is used 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 are arranged in order setting along the light direction of transfer;
Described polaroid is used for seeing through the light parallel with its light transmission shaft direction, obtains first linearly 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 the compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with the compensation liquid crystal cell;
Described control device of electric field is used for first voltage being provided, providing second voltage to the 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, second time period and the 3rd time period, in very first time section, described first voltage and second voltage are all high level, in second time period, first voltage and second voltage are all low level, in the 3rd time period, first voltage is high level and second voltage is low level;
Wherein, when the voltage on the voltage on the driving liquid crystal cell and the compensation liquid crystal cell is in high level together, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, voltage on driving liquid crystal cell and compensation liquid crystal cell is dropped in the low level process gradually by high level, drive liquid crystal cell and compensate liquid crystal cell opposite and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, drive the voltage on the liquid crystal cell and compensate liquid crystal cell when being in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to second linearly polarized light of first linearly polarized light, second linearly polarized light becomes the 3rd linearly polarized light that the polarization direction is parallel to first linearly polarized light via the compensation liquid crystal cell, drive that liquid crystal cell is in high level and when compensating liquid crystal cell and being in low level, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, and first linearly polarized light becomes the polarization direction perpendicular to the 4th linearly polarized light of first linearly polarized light via the compensation liquid crystal cell then.
Described phaser is arranged at going out on the 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, change into left circularly polarized light or right-circularly polarized light for the linearly polarized light that will compensate the liquid crystal cell outgoing.
By the way, a kind of liquid crystal cell structure that the utility model provides and the projector that comprises described liquid crystal cell structure and stereo projection system, by adopting the compensation liquid crystal cell to compensate birefringence and the time delay effect that drives liquid crystal layer in the liquid crystal cell, can improve the display effect of image.
Description of drawings
Fig. 1 is the simplified structure synoptic diagram of first embodiment of liquid crystal cell structure of the present utility model;
Fig. 2 is the detailed construction synoptic diagram of liquid crystal cell structure among Fig. 1;
Fig. 3 is the simplified structure synoptic diagram of second embodiment of liquid crystal cell structure of the present utility model;
Fig. 4 is the structural representation of first embodiment of projector of the present utility model;
Fig. 5 is the structural representation of second embodiment of projector of the present utility model;
Fig. 6 is the structural representation of first embodiment of stereo projection system of the present utility model;
Fig. 7 is the structural representation of second embodiment of stereo projection system of the present utility model;
Fig. 8 is the principle of work synoptic diagram of liquid crystal cell structure shown in Figure 1.
Embodiment
See also Fig. 1, Fig. 1 is the simplified structure synoptic diagram of first embodiment of liquid crystal cell structure of the present utility model.As shown in Figure 1, the liquid crystal cell structure 10 of 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 are arranged in order setting along the light direction of transfer.Wherein, the incidence surface and the polaroid 11 that drive liquid crystal cell 12 are bonding, and 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 is used for seeing through the light parallel with its light transmission shaft direction, obtains first linearly polarized light, and first linearly polarized light goes into to inject to drive liquid crystal cell 12.Whether driving liquid crystal cell 12 changes the polarization direction of first linearly polarized light need be determined according to the duty of control device of electric field.
Described control device of electric field is used for providing first voltage to driving liquid crystal cell 12, provide second voltage to compensation liquid crystal cell 13, 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 first voltage and second voltage are all high level, in the second time period t 1-t2, first voltage and second voltage are all low level, in the 3rd time t2-t3 section, first voltage is high level and second voltage is low level.In the present embodiment, when the voltage on the voltage on the driving liquid crystal cell 12 and the compensation liquid crystal cell 13 is in high level together, first linearly polarized light directly sees through and drives liquid crystal cell 12 more directly through compensation liquid crystal cell 13, the voltage that drives liquid crystal cell 12 and drive on liquid crystal cell 12 and the compensation liquid crystal cell 13 is dropped in the low level process by high level gradually, the sense of rotation of the polarization direction of driving liquid crystal cell 12 and 13 pairs of linearly polarized lights of compensation liquid crystal cell is opposite and the anglec of rotation is identical, when the voltage on the voltage on the driving liquid crystal cell 12 and the compensation liquid crystal cell 13 is in low level together, from driving liquid crystal cell 12 outgoing polarization directions perpendicular to second linearly polarized light of first linearly polarized light, second linearly polarized light becomes the 3rd linearly polarized light that the polarization direction is parallel to first linearly polarized light via compensation liquid crystal cell 13, drive that liquid crystal cell 12 is in high level and when compensating liquid crystal cell 13 and being in low level, first linearly polarized light directly sees through and drives liquid crystal cell 12 more directly through compensation liquid crystal cell 13, and first linearly polarized light becomes the polarization direction perpendicular to the 4th linearly polarized light of first linearly polarized light via compensation liquid crystal cell 13 then.
When drive that liquid crystal cell 12 and compensation liquid crystal cell adopt be TN type liquid crystal the time, see also Fig. 8, Fig. 8 is the principle of work synoptic diagram of liquid crystal cell structure shown in Figure 1.As shown in Figure 8, Fig. 8 (A) is the time dependent synoptic diagram of institute's making alive that drives liquid crystal cell 12, Fig. 8 (B) is the time dependent synoptic 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 to drive when the compensation liquid crystal cell 13 shown in liquid crystal cell 12 and Fig. 8 (B) is added on the compensation liquid crystal cell and drives liquid crystal cell to the windup-degree synoptic diagram of linearly polarized light, Fig. 8 (D) is the windup-degree synoptic diagram that the voltage shown in Fig. 8 (A) is added on 13 pairs of linearly polarized lights of compensation liquid crystal cell when driving the compensation liquid crystal cell 13 shown in liquid crystal cell 12 and Fig. 8 (B) and being added on the compensation liquid crystal cell, and Fig. 8 (E) is the synoptic diagram with Fig. 8 (C) polarization direction anglec of rotation of the linearly polarized light of the synchronous corresponding incident time on.Wherein, perpendicular to the polarization direction of first linearly polarized light, the four-headed arrow representative of vertical direction is parallel to the polarization direction of first linearly polarized light to the representative of horizontal bidirectional arrow among Fig. 8 (E) from the polarization direction of the linearly polarized light of compensation liquid crystal cell 13 outgoing from the polarization direction of the linearly polarized light of compensation liquid crystal cell 13 outgoing.
Therefore, the liquid crystal cell structure 10 of present embodiment alternately outgoing polarization direction is parallel to the linearly polarized light of first linearly polarized light and polarization direction perpendicular to the polarized light of first linearly polarized light, and adopts and drive liquid crystal cell 12 and compensation liquid crystal cell 13 structures can effectively compensate the voltage delay effect that drives liquid crystal cell 12.
See also Fig. 2, Fig. 2 is the detailed construction synoptic diagram of liquid crystal cell structure among Fig. 1.As shown in Figure 2, described driving liquid crystal cell 12 comprises first conductive layer 121, first liquid crystal layer 122, second conductive layer 123 and first glass plate 124 that is arranged in parallel successively along the direction of transfer of first linearly polarized light, described first conductive layer 121 and second conductive layer 123 are transparency conducting layer, and described first conductive layer 121 and second conductive layer 123 and first liquid crystal layer 123 are bonding, and described second conductive layer 123 and first glass plate 124 are bonding; Described compensation liquid crystal cell 13 comprises second glass plate 131, the 3rd conductive layer 132, second liquid crystal layer 133 and the 4th conductive layer 134 that is 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 second liquid crystal layer 133 are bonding, and described the 3rd conductive layer 132 and second glass plate 131 are bonding.This kind situation, described first Polarizer 11 and first conductive layer 121 are bonding, first glass plate 124 and second glass plate 131 are bonding, and in other embodiment of liquid crystal cell structure 10, described first glass plate 124 and 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 utility model, described first glass plate 124 and second glass plate 131 also can be substituted by a glass plate, make second conductive layer 123 and the 3rd conductive layer 132 be bonded on the same glass plate.
Please further referring to Fig. 2, in another embodiment of liquid crystal cell structure 10 of the present utility model, described driving liquid crystal cell 12 further comprises the 3rd glass plate 125, described first linearly polarized light incides on 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 first conductive layer 121 is bonding, described compensation liquid crystal cell 13 further comprises the 4th glass plate 135, through 135 outgoing of the 4th glass plate, the exit facet of the plane of incidence of described the 4th glass plate 135 and the 4th conductive layer 134 is bonding from the light of described the 4th conductive layer 134 outgoing.
Please further referring to Fig. 2, the voltage swing that described driving liquid crystal cell 12 and described compensation liquid crystal cell 13 apply equates, polarity is opposite, particularly, and as shown in Figure 2, first conductive layer, 121 polarity are for just, second conductive layer, 123 polarity are for negative, and the electric potential difference between first conductive layer 121 and second conductive layer 123 is u, and the 3rd conductive layer 132 polarity are for negative, the 4th conductive layer 134 polarity are for just, and the electric potential difference between the 3rd conductive layer 132 and the 4th conductive layer 134 is-u.Certainly, the electric potential difference between first conductive layer 121 and second conductive layer 123 also can be-u, and the electric potential difference between the 3rd conductive layer 132 and the 4th conductive layer 134 is u, and this situation is also within protection domain of the present utility model.
In a preferred embodiment of liquid crystal cell structure of the present utility model, described first conductive layer 121, 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.
First liquid crystal layer 122 and second liquid crystal layer 133 comprise described in the preferred embodiment of the present utility model: 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.First liquid crystal layer 122 described in another preferred embodiment of the present utility model and 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.Described twisted-nematic TN type liquid crystal layer and super twisted nematic STN type liquid crystal layer exist birefringence and time delay effect in applying the process of electric field, can influence the display effect of display frame, therefore, adopt the scheme of two liquid crystal cells of liquid crystal cell structure of the present utility model can compensate this birefringence and time delay effect, improve the display effect of display device.
See also Fig. 3, Fig. 3 is the simplified structure synoptic diagram of second embodiment of liquid crystal cell structure of the present utility model.As shown in Figure 3, the liquid crystal cell structure 20 of 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 are arranged in order setting along the light direction of transfer.
Liquid crystal cell structure 10 shown in Figure 3 is with the difference of liquid crystal cell structure 20 shown in Figure 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, change into left circularly polarized light or right-circularly polarized light for the linearly polarized light that will compensate liquid crystal cell 13 outgoing, so the emergent ray of liquid crystal cell structure 20 is left circularly polarized light or right-circularly polarized light among Fig. 2.
In second embodiment of liquid crystal cell structure of the present utility model, the control device of electric field that alternately is in first duty and second duty makes liquid crystal cell structure 20 alternately produce left circularly polarized light and right-circularly polarized light.
See also Fig. 4, Fig. 4 is the structural representation of first embodiment of projector of the present utility model.As shown in Figure 4, the projector 30 of 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 used for generating picture signal light.Described liquid crystal cell structure adopts is the structure of liquid crystal cell structure 10 shown in Figure 1, described liquid crystal cell structure is arranged on the bang path of picture signal light, be used for picture signal light is changed over two kinds of different polarized lights, be specially the 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 the printing opacity of polaroid 11.The axial linearly polarized light of printing opacity and polarization direction that described polarization direction is parallel to polaroid 11 are alternately incided projection lens and are transmitted through screen imaging through projection lens perpendicular to the axial linearly polarized light of the printing opacity of polaroid 11.
In the concrete application of present embodiment, the user can cooperate the projector 30 of present embodiment to watch 3D projected image effect by wearing the line polaroid glasses.
See also Fig. 5, Fig. 5 is the structural representation of second embodiment of projector of the present utility model.Shown in Figure 5, the projector 40 of 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 used for generating picture signal light.Described liquid crystal cell structure adopts is the structure of liquid crystal cell structure 20 shown in Figure 3, described liquid crystal cell structure is arranged on the bang path of picture signal light, be used for picture signal light is changed over two kinds of different polarized lights, specifically comprise left circularly polarized light and right-circularly polarized light.The left circularly polarized light that alternately produces 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 the projection screen imaging.
In the concrete application of present embodiment, the user can cooperate the projector 40 of present embodiment to watch 3D projected image effect by wearing the rotatory polarization glasses.
Wherein, in the concrete application of projector of the present utility model, the image signal processing equipment that comprises in projector 30 shown in Figure 4 and the projector 40 shown in Figure 5 comprises: digital light is handled the type image signal treatment facility, is used for generating picture signal light; Or liquid crystal on silicon type image signal treatment facility, be used for generating picture signal light; Or the liquid crystal type image signal processing equipment, be used for generating picture signal light; Or display device, being used for generating picture signal light, described display device comprises TV, computer, projector, navigating instrument, mobile phone, camera.
See also Fig. 6, Fig. 6 is the structural representation of first embodiment of stereo projection system of the present utility model.As shown in Figure 6, the stereo projection system 50 of present embodiment comprises: projector, liquid crystal cell structure and line polaroid glasses (not shown).Wherein, projector is used for projects images signal light to the projection screen imaging; Liquid crystal cell structure is arranged between projector and the projection screen on the light path, is used for described picture signal light is become two kinds of different linearly polarized lights; The line polaroid glasses are arranged on the light travel 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 the described frame, the light transmission shaft direction of described left eyeglass is parallel with the polarization direction of one of described two kinds of different linear polarization light, and the polarization direction of the another kind of linearly polarized light in the light transmission shaft direction of described right eyeglass and the described two kinds of different linear polarization light is parallel.
In the present embodiment, described liquid crystal cell structure adopts is the technical scheme of the liquid crystal cell structure 10 of first embodiment of the present utility model shown in Figure 1, the structure of described liquid crystal cell structure 10 and principle of work have provided detailed description in first embodiment of the present utility model, do not repeat them here.
See also Fig. 7, Fig. 7 is the structural representation of second embodiment of stereo projection system of the present utility model.As shown in Figure 7, the stereo projection system 60 of present embodiment comprises: projector, liquid crystal cell structure and rotatory polarization glasses (not shown).Wherein, projector is used for projects images signal light to the projection screen imaging; Liquid crystal cell structure is arranged between projector and the projection screen on the light path, is used for described picture signal light is become left circularly polarized light and right-circularly polarized light; The rotatory polarization glasses are arranged on the light travel 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 the described frame, and described left eyeglass comprises: left eyeglass quarter-wave plate and left eyeglass polaroid; Described left eyeglass quarter-wave plate changes the left eye linearly polarized light for one of the left circularly polarized light that will obtain and right-circularly polarized light after described projection screen reflection; Described left eyeglass polaroid is used 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 changes the right eye linearly polarized light for the left circularly polarized light that will obtain and the another kind of circularly polarized light of right-circularly polarized light after described projection screen reflection; Described right eyeglass polaroid is used 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, described liquid crystal cell structure adopts is the technical scheme of the liquid crystal cell structure 20 of second embodiment of the present utility model shown in Figure 3, the structure of described liquid crystal cell structure 20 and principle of work have provided detailed description in first embodiment of the present utility model, do not repeat them here.
In using particularly, the user is by stereo projection system of the present utility model 50 shown in Figure 6 and stereo projection system 60 shown in Figure 7, the purpose that can realize watching the 3D projected image.
By the way, the liquid crystal cell structure that the utility model provides and comprise projector and the stereo projection system of described liquid crystal cell structure, by adopting the compensation liquid crystal cell to compensate birefringence and the time delay effect that drives liquid crystal layer in the liquid crystal cell, can improve the display effect of image.
For the utility model liquid crystal cell structure, the projector that comprises described liquid crystal cell structure and stereo projection system, the form of realization is diversified.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a liquid crystal cell structure is characterized in that, comprises control device of electric field and the polaroid, driving liquid crystal cell and the compensation liquid crystal cell that are arranged in order setting along the light direction of transfer;
Described polaroid is used for seeing through the light parallel with its light transmission shaft direction, obtains first linearly 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 the compensation liquid crystal cell, and described driving liquid crystal cell comprises identical liquid crystal layer with the compensation liquid crystal cell;
Described control device of electric field is used for first voltage being provided, providing second voltage to the 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, second time period and the 3rd time period, in very first time section, described first voltage and second voltage are all high level, in second time period, first voltage and second voltage are all low level, in the 3rd time period, first voltage is high level and second voltage is low level;
Wherein, when the voltage on the voltage on the driving liquid crystal cell and the compensation liquid crystal cell is in high level together, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, voltage on driving liquid crystal cell and compensation liquid crystal cell is dropped in the low level process gradually by high level, drive liquid crystal cell and compensate liquid crystal cell opposite and the anglec of rotation is identical to the sense of rotation of the polarization direction of linearly polarized light, when the voltage on the voltage on the driving liquid crystal cell and the compensation liquid crystal cell is in low level together, from driving liquid crystal cell outgoing polarization direction perpendicular to second linearly polarized light of first linearly polarized light, second linearly polarized light becomes the 3rd linearly polarized light that the polarization direction is parallel to first linearly polarized light via the compensation liquid crystal cell, drive that liquid crystal cell is in high level and when compensating liquid crystal cell and being in low level, first linearly polarized light directly sees through and drives liquid crystal cell more directly through the compensation liquid crystal cell, and first linearly polarized light becomes the polarization direction perpendicular to the 4th linearly polarized light of first linearly polarized light via the compensation liquid crystal cell then.
2. liquid crystal cell structure according to claim 1, it is characterized in that, described driving liquid crystal cell comprises first conductive layer, first liquid crystal layer, second conductive layer and first glass plate that is arranged in parallel successively along the direction of transfer of first linearly polarized light, described first conductive layer and second conductive layer are transparency conducting layer, and described first conductive layer and second conductive layer and first liquid crystal layer are bonding, and described second conductive layer and first glass plate are bonding; Described compensation liquid crystal cell comprises second glass plate, the 3rd conductive layer, second liquid crystal layer and the 4th conductive layer that is 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 second liquid crystal layer are bonding, and described the 3rd conductive layer and 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 linearly polarized light incides on first conductive layer after seeing through the 3rd glass plate, the plane of incidence of the exit facet of the 3rd glass plate and first conductive layer is bonding, described compensation liquid crystal cell further comprises the 4th glass plate, 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 from the light of described the 4th conductive layer outgoing.
4. liquid crystal cell structure according to claim 2 is characterized in that, described first conductive layer, 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 first liquid crystal layer and 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 first liquid crystal layer and 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 any described liquid crystal cell structure of claim 1-6, 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, change into left circularly polarized light or right-circularly polarized light for the linearly polarized light that will compensate the liquid crystal cell outgoing.
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| CN2013200355828U CN203178634U (en) | 2013-01-23 | 2013-01-23 | Liquid crystal box structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950465A (en) * | 2014-03-28 | 2015-09-30 | 深圳市亿思达科技集团有限公司 | Dual-optical-path stereoscopic video conversion system employing metal polarizing light-splitting grating |
| WO2015143781A1 (en) * | 2014-03-28 | 2015-10-01 | 深圳市亿思达科技集团有限公司 | Three-light path polarized light-splitting stereographic video switching system |
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2013
- 2013-01-23 CN CN2013200355828U patent/CN203178634U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950465A (en) * | 2014-03-28 | 2015-09-30 | 深圳市亿思达科技集团有限公司 | Dual-optical-path stereoscopic video conversion system employing metal polarizing light-splitting grating |
| WO2015143781A1 (en) * | 2014-03-28 | 2015-10-01 | 深圳市亿思达科技集团有限公司 | Three-light path polarized light-splitting stereographic video switching system |
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