CN102231033B - Liquid crystal lens and control method thereof, 3D (three-dimensional) display device and computer system - Google Patents
Liquid crystal lens and control method thereof, 3D (three-dimensional) display device and computer system Download PDFInfo
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- CN102231033B CN102231033B CN201110140759.6A CN201110140759A CN102231033B CN 102231033 B CN102231033 B CN 102231033B CN 201110140759 A CN201110140759 A CN 201110140759A CN 102231033 B CN102231033 B CN 102231033B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 285
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- 230000005684 electric field Effects 0.000 claims abstract description 211
- 230000000694 effects Effects 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 9
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
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- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
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Abstract
The invention discloses a liquid crystal lens and a control method thereof. The liquid crystal lens comprises a liquid crystal lens and a liquid crystal layer, wherein the liquid crystal lens comprises two electrode structures which are formed at an interval; the liquid crystal layer is formed between the two electrode structures and comprises a plurality of liquid crystal molecules arranged along an initial arrangement direction; each electrode structure is used for generating a first electric field for changing the arrangement direction of the liquid crystal molecules, so that the liquid crystal layer has a lens effect; each electrode structure is used for further generating a second electric field for returning the liquid crystal molecules back to the initial arrangement direction; when the liquid crystal molecules are in the initial arrangement direction, the liquid crystal layer does not have the lens effect; the second electric field at least comprises an electric field of a first period of time and an electric field of a second period of time; and the intensity of the electric field of the first period of time is higher than that of the electric field of the second period of time.
Description
[technical field]
The invention belongs to liquid crystal technology field, relate in particular to a kind of liquid crystal lens and control method thereof, also relate to a kind of 3D display device and computer system that adopts liquid crystal lens.
[background technology]
Along with the development of liquid crystal technology, liquid crystal material is widely used in various fields.
For example, traditional optical zoom mirror group at least needs more than two lens mobile effect that just can reach zoom that cooperatively interacts.In actual application, this kind of optical zoom mirror group is often comparatively thick and heavy and volume is large, brings great inconvenience to user's use.
LC Lens (Liquid Crystal Lens, liquid crystal lens) be a kind of utilize liquid crystal molecule birefringent characteristic and with Electric Field Distribution change alignment characteristics allow light beam focus on or the optical module of dispersing.LC Lens can change the orientation of liquid crystal molecule by changing operating voltage, and then realizes the effect of focusing/zooming distance, and the frivolous characteristic of LC Lens is a large advantage especially, and it can reach effective optical zoom effect in little space.
In prior art, the effect of the phase delay (phase retardation) of wishing to get in order to reach, general liquid crystal lens needs thicker liquid crystal layer conventionally, but blocked up liquid crystal layer can cause the response time of liquid crystal lens long.Taking the liquid crystal layer of thickness 60 μ m as example, the response time is about 30 seconds, and operating voltage need to exceed 30 volts.Although can improve liquid crystal focal time by the operating voltage that changes liquid crystal lens in prior art, but only only limit to change the focal time of liquid crystal lens, do not improve the long problem of spended time in the process that liquid crystal molecule in liquid crystal lens is returned to initial arrangement direction, in use, still there is larger inconvenience in user.
How reducing the response time of liquid crystal lens, especially shorten liquid crystal molecule and be returned to the time of initial arrangement direction, improve the efficiency of liquid crystal lens, is one of direction of liquid crystal technology area research.
[summary of the invention]
Technical matters solved by the invention is to provide a kind of liquid crystal lens and control method thereof, to reduce the response time of liquid crystal lens, especially shortens liquid crystal molecule and be returned to the time of non-lens effect state, improves the efficiency of liquid crystal lens.
The invention provides a kind of liquid crystal lens, comprising: two spaced electrode structures; Liquid crystal layer, is arranged between described two electrode structures, and comprises multiple liquid crystal molecules of arranging along initial arrangement direction; Wherein, described electrode structure produces the first electric field, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer has lens effect; Described electrode structure further produces the second electric field, described the second electric field is used for making described liquid crystal molecule to be returned to initial arrangement direction, liquid crystal molecule is in the time of described initial arrangement direction, described liquid crystal layer does not have lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
According to a preferred embodiment of the invention, the electric field of described very first time section is held time and is greater than the electric field of described the second time period and holds time.
According to a preferred embodiment of the invention, described two electrode structures comprise the first electrode structure and the second electrode structure, described the first electrode structure comprises multiple the first strip electrodes that space arranges and extend along the first bearing of trend, described the second electrode structure comprises multiple the second strip electrodes that space arranges and extend along the second bearing of trend, wherein said the first bearing of trend intersects with described the second bearing of trend, produce described the first electric field by form voltage difference between described the first strip electrode and described the second strip electrode, produce described the second electric field by form voltage difference between described multiple the second strip electrodes.
According to a preferred embodiment of the invention, described two electrode structures comprise the first electrode structure and the second electrode structure, described the first electrode structure comprises multiple the first strip electrodes that space arranges and extend along the first bearing of trend, described the second electrode structure comprises multiple the second strip electrodes that space arranges and extend along the second bearing of trend, wherein said the first bearing of trend is parallel with described the second bearing of trend, produce described the first electric field by form voltage difference between described the first strip electrode and described the second strip electrode, by between described multiple the first strip electrodes and/or form voltage difference between described multiple the second strip electrode and produce described the second electric field.
According to a preferred embodiment of the invention, described the first electrode structure further comprises the first highly resistant material layer being arranged between described the first strip electrode, and/or described the second electrode structure further comprises the second highly resistant material layer being arranged between described the second strip electrode.
The present invention also provides a kind of control method of liquid crystal lens, comprising: one first electric field is provided, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer produces lens effect; One second electric field is provided, described the second electric field is used for making described liquid crystal molecule to be returned to initial arrangement direction, wherein, described liquid crystal molecule is in the time of described initial arrangement direction, described liquid crystal layer does not have lens effect, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
The present invention also provides a kind of control method of liquid crystal lens, comprise: one first electric field is provided, described the first electric field is used for making liquid crystal molecule in first order state, and described first order state is to make described liquid crystal layer have the ordered state of the liquid crystal molecule of lens effect; One second electric field is provided, described the second electric field is used for making liquid crystal molecule in second order state, described second order state is to make described liquid crystal layer not have the ordered state of the liquid crystal molecule of lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
The present invention also provides a kind of 3D display device, and described device comprises liquid crystal lens, and described liquid crystal lens comprises: two spaced electrode structures; Liquid crystal layer, is arranged between described two electrode structures, and comprises multiple liquid crystal molecules of arranging along initial arrangement direction; Wherein, described electrode structure produces the first electric field, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer has lens effect; Described electrode structure further produces the second electric field, described the second electric field is used for making described liquid crystal molecule to be returned to initial arrangement direction, under described initial arrangement direction, described liquid crystal layer does not have lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
The present invention also provides a kind of computer system, comprising: processor, and it is configured to carry out instruction and carries out the operation relevant to computer system; 3D display device, it is operatively coupled to described processor, and described 3D display device comprises: two spaced electrode structures; Liquid crystal layer, is arranged between described two electrode structures, and comprises multiple liquid crystal molecules of arranging along initial arrangement direction; Wherein, described electrode structure produces the first electric field, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer has lens effect; Described electrode structure further produces the second electric field, described the second electric field is used for making described liquid crystal molecule to be returned to initial arrangement direction, under described initial arrangement direction, described liquid crystal layer does not have lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
By the way, greatly reduce the response time of liquid crystal lens, especially shortened the time that the liquid crystal molecule in liquid crystal layer is returned to non-lens effect state, and then improve greatly the efficiency of liquid crystal lens, be beneficial to the propagation and employment of liquid crystal lens, especially in 3D display device and having in the computer system of 3D restraint device, for user provides good operating experience.
[brief description of the drawings]
Fig. 1 is the structural drawing of liquid crystal lens the first preferred embodiment provided by the invention;
Fig. 2 is the schematic diagram of the first electric field in the first preferred embodiment of the present invention;
Fig. 3 is a schematic diagram of the second electric field in the first preferred embodiment of the present invention;
Fig. 4 is another schematic diagram of the second electric field in the first preferred embodiment of the present invention;
Fig. 5 is the structural drawing of the liquid crystal lens providing the second preferred embodiment of the present invention and the schematic diagram of the second electric field;
Fig. 6 is the structural drawing of liquid crystal lens provided by the invention the 3rd preferred embodiment;
Fig. 7 is the schematic diagram of the first electric field in the 3rd preferred embodiment of the present invention;
Fig. 8 is the schematic diagram of the second electric field in the 3rd preferred embodiment of the present invention;
Fig. 9 is the another kind of schematic diagram of part-structure in the 3rd preferred embodiment of the present invention;
Figure 10 is the process flow diagram of the control method of liquid crystal lens provided by the invention;
Figure 11 is the voltage oscillogram of the second electric field in a preferred embodiment provided by the invention.
[embodiment]
Below in conjunction with drawings and Examples, the present invention is described in detail.
Liquid crystal lens provided by the invention comprises two spaced electrode structures and liquid crystal layer.Wherein, liquid crystal layer is arranged between two electrode structures, and liquid crystal layer comprises multiple liquid crystal molecules.
In specific implementation process, this electrode structure is for generation of one first electric field, and the first electric field makes liquid crystal molecule in first order state, so that liquid crystal layer has lens effect.Further, this electrode structure is also for generation of one second electric field, and the second electric field is used for making liquid crystal molecule in second order state.Liquid crystal molecule is in the time of second order state, and liquid crystal layer does not have lens effect.
Refer to Fig. 1, Fig. 1 shows the structure of the first preferred embodiment of liquid crystal lens provided by the invention.
In the present embodiment, liquid crystal lens comprises first substrate 11, the first electrode structure 12, the first both alignment layers 13, liquid crystal layer 14, the second both alignment layers 15, the second electrode structure 16 and second substrate 17 successively.
Wherein, the first electrode structure 12 is arranged on first substrate 11, comprises multiple the first strip electrodes 121.Multiple the first strip electrode 121 spaces arrange, and extend along the first bearing of trend D1.
The second electrode structure 16 is arranged on second substrate 17, comprises multiple the second strip electrodes 161, dielectric layer 162 and face electrode 163.Wherein, multiple the second strip electrode 161 spaces arrange, and extend along the second bearing of trend D2.Face electrode 163 and the second strip electrode dip stratum are folded and insulation arranges.Dielectric layer 162 is arranged between the second strip electrode 161 and face electrode 163, certainly, between multiple the second strip electrodes 161 and face electrode 163, the material that other insulate both also can be set, and does not enumerate herein.In the present embodiment, face electrode 163 setting adjacent with second substrate 17.
Liquid crystal layer 14 is arranged between the first electrode structure 12 and the second electrode structure 16, and the first both alignment layers 13 is arranged between liquid crystal layer 14 and the first electrode structure 12, and the second both alignment layers 15 is arranged between liquid crystal layer 14 and the second electrode structure 16.
In specific implementation process, the first bearing of trend D1 and the second bearing of trend D2 intersect mutually.Preferably, the first bearing of trend D1 is mutually vertical with the second bearing of trend D2.
In liquid crystal layer 14, include the liquid crystal molecule of arranging along initial arrangement direction.The first both alignment layers 13 and the second both alignment layers 15 cooperatively interact so that liquid crystal molecule is arranged along initial arrangement direction.In the present embodiment, by modes such as friction matching or radiation orientations, make the alignment direction D3 of the first both alignment layers 13 and the alignment direction D4 of the second both alignment layers 15 all parallel with the first bearing of trend D1, make the initial arrangement direction of liquid crystal molecule be parallel to the first bearing of trend D1.
Preferably, first substrate 11 and second substrate 17 are glass substrate, can certainly be the transparency carriers of other material, as long as light can be seen through, do not enumerate herein.
Preferably, the first strip electrode 121, the second strip electrode 161 and face electrode 163 are transparency conducting layer, for example can be indium tin oxide (Indium Tin Oxide, ITO) or indium-zinc oxide (Indium Zinc Oxide, IZO), do not enumerate herein.
Preferably, dielectric layer 162 is transparent insulation material, for example can be monox (SiOx) or silicon nitride (SiNx), does not enumerate herein.
The principle of work of the present invention's the first preferred embodiment is described below:
Wherein, the production process of the first electric field is described below:
Refer to Fig. 2, on multiple the first strip electrodes 121, apply suitable voltage V1, V2, V3 and V4, wherein, for ensureing to form good lens effect, V1, V2, V3 relative V4 symmetry respectively.In specific implementation process, on the second strip electrode 161, apply no-voltage or reference voltage Vref, on face electrode 163, apply too no-voltage or reference voltage Vref simultaneously.Like this, between multiple the first strip electrodes 121 and the second strip electrode 161 and face electrode 163, form corresponding voltage difference, the plurality of voltage difference is at interior generation the first electric field of liquid crystal layer 14.The orientation under the effect of the first electric field of liquid crystal molecule in liquid crystal layer 14 changes, the situation of arranging according to liquid crystal molecule in liquid crystal layer 14, the deflection angle difference of the liquid crystal molecule of zones of different, make the refractive index of liquid crystal molecule present parabola shaped variation, and then the lens of formation centered by V1 or V4, reach and make the lensed effect of liquid crystal layer 14 tool, thereby realize the object that focuses on or disperse.
Fig. 2 is shown in 7 the first strip electrodes 121 and applies corresponding voltage only for the forming process of explanation lens, is not construed as limiting the invention.According to the parameter of required lens, can suitable adjustment execute number and the magnitude of voltage of alive the first strip electrode 121.For example in the ordinary course of things, the number of the first strip electrode 121 is chosen as odd number, applies first strip electrode 121 symmetries of voltage with centre, from forming the lens arrangement with target symmetry.Certainly, also can select the number of the first strip electrode 121 is even number, applies two first strip electrode 121 symmetries of voltage with centre, from forming the lens arrangement with middle two the first strip electrode 121 symmetries.
In the first preferred embodiment, produce the time of lens effect in order to accelerate liquid crystal lens, produce in the process of lens effect at liquid crystal layer, voltage V1, V2, V3 and V4 adopt overdrive voltage (overdrive voltage), make voltage V1, V2, V3 and V4 coordinate formation one overdrive voltage poor with no-voltage or reference voltage Vref.This overdrive voltage is poor at the first larger electric field of the interior generation of liquid crystal layer 14, and the pace of change of liquid crystal molecule under the effect of the first larger electric field accelerated.After in due course, voltage V1, V2, V3 and V4 switch back to burning voltage again, make the interior maintenance steady voltage difference of liquid crystal layer 14, and this burning voltage official post liquid crystal layer 14 keeps lens effect.Be greater than steady voltage difference because overdrive voltage is poor, accelerated greatly the time that liquid crystal lens produces lens effect.
Wherein, the production process of the second electric field is described below:
Refer to Fig. 3, on the second strip electrode 161, all apply a same voltage V1, on face electrode 163, apply no-voltage or reference voltage Vref.Like this, between the second strip electrode 161 and face electrode 163, form a voltage difference, and then produce the second electric field.The direction of this second electric field is same parallel or be parallel at least partly the initial arrangement direction of liquid crystal molecule, make liquid crystal molecule under the effect of the second electric field, Quick-return is to initial arrangement direction, the situation of arranging according to liquid crystal molecule in liquid crystal layer 14, in the time of initial arrangement direction, the deflection angle of the liquid crystal molecule of zones of different is basically identical, and liquid crystal layer 14 no longer has lens effect.
Refer to Fig. 4, Fig. 4 shows the another kind of producing method of the second electric field.What on the second adjacent strip electrode 161, replace applies voltage V1 and no-voltage or reference voltage Vref.Like this, between the second adjacent strip electrode 161, form a voltage difference, and then produce the second electric field.Wherein, the direction of the second electric field is parallel or be parallel at least partly the initial arrangement direction of liquid crystal molecule, make liquid crystal molecule under the effect of the second electric field, acceleration is returned to initial arrangement direction, the situation of arranging according to liquid crystal molecule in liquid crystal layer 14, in the time of initial arrangement direction, the deflection angle of the liquid crystal molecule of zones of different is basically identical, and liquid crystal layer 14 no longer has lens effect.
Further, the type of drive of a kind of optimization the second electric field is proposed,, the second electric field adopts the electric field changing, when this is conducive to make liquid crystal molecule to be returned to initial arrangement direction, arrange more regular and homogenization, provide condition for form liquid crystal lens sooner, more accurately under the first power plant of next cycle.
Please specifically consult Figure 11 and Fig. 4, in Figure 11, curve representative is applied to the oscillogram of the second strip electrode 161 voltages.
Particularly, the type of drive of the second electric field of optimization comprises:
Very first time section T1: alternately apply a higher voltage V on the second adjacent strip electrode 161
hwith no-voltage or reference voltage Vref, can form a stronger transverse electric field at adjacent two the second strip electrodes 161 like this, under the driving of highfield, liquid crystal molecule is replied to initial arrangement direction with speed faster;
The second time period T2: by higher voltage V
hbe reduced to lower voltage V
l, keep closing on no-voltage or the reference voltage Vref on electrode, can form weak transverse electric field at two adjacent the second strip electrodes 161 like this, under the driving of weak electric field, liquid crystal molecule can be eliminated the irregularity of highfield to Liquid Crystal Molecules Alignment, the electric field force that gives liquid crystal molecule gentleness carries out more regular sequence, especially can eliminate the arrangement interference effect between liquid crystal molecule, be conducive to liquid crystal molecule and return to the ordered state that more approaches initial arrangement state, through the regular combing effect of weak electric field, what liquid crystal molecule was more regular rotates to initial arrangement direction,
The 3rd time period T3: lower voltage V
lbe down to no-voltage or reference voltage Vref, the electric field hour between two adjacent like this second strip electrodes 161, liquid crystal molecule, in initial arrangement direction, is waited for liquid crystal lens driving voltage next time, forms lens effect.
General, holding time of very first time section T1 is greater than holding time of the second time period T2.The time that is appreciated that very first time section T1, the second time period T2, the 3rd time period T3 holds time and need to, according to the parameter specific design of concrete liquid crystal lens, not limit at this.
Be appreciated that, the second electric field can also comprise time period that multiple electric field intensity is different, for example, between the second time period T2 and the 3rd time period T3, insert the stronger transverse electric field of a short period section, for by level off to initial arrangement direction liquid crystal molecule accelerate rotation, thereby further shorten liquid crystal molecule and be returned to the time of initial arrangement direction, promote the corresponding speed of liquid crystal lens.
Adopt the type of drive of the second electric field of above-mentioned optimization liquid crystal molecule can be returned to the consistance of initial arrangement direction, its advantage is: adopt under the non-lens state of this driving method formation, its translucent effect is more even, can avoid the light twisted phenomena causing because Liquid Crystal Molecules Alignment is irregular, improve the effect that 2D shows; Meanwhile, more regularly arranged liquid crystal molecule, contributes to form homogeneous liquid crystal lens within the next lens cycle, improves 3D display effect.
Certainly, the driving method shown in Figure 11 also can be combined with the driving method shown in Fig. 3, optimizes the return action of the second electric field to liquid crystal molecule.Namely, by higher voltage V
hlower voltage V
land no-voltage or reference voltage Vref be applied on each second strip electrode 161 successively, no-voltage or reference voltage Vref are applied on face electrode 163.The driving method of concrete driving process shown in being combined with Fig. 4 with above-mentioned Figure 11 is similar, does not repeat them here.
Refer to Fig. 5, Fig. 5 is the structural drawing of the liquid crystal lens providing the second preferred embodiment of the present invention and the schematic diagram of the second electric field.
Liquid crystal lens shown in Fig. 5 is substantially similar to the liquid crystal lens structure of the first embodiment shown in Fig. 1-Fig. 4.
The key distinction point of the liquid crystal lens of the liquid crystal lens of the second embodiment and the first embodiment is: the second electrode structure 26 of the liquid crystal lens of the second embodiment comprises multiple the second strip electrodes 261 that are arranged on second substrate 27.Namely, the second electrode structure 26 has omitted face electrode 163 between the second strip electrode 161 and the second substrate 17 in the first embodiment and the structure of attached dielectric layer 162 thereof.
Due to the change of device architecture, also there is corresponding variation in the second embodiment liquid crystal lens principle of work, specifically describes as follows:
Wherein, the production process of the first electric field is described below:
On multiple the first strip electrodes 221, apply suitable voltage, for example, with the driving voltage of the first strip electrode 221 symmetries of centre, on the second strip electrode 261, apply no-voltage or reference voltage Vref.Like this, between multiple the first strip electrodes 221 and the second strip electrode 261, form corresponding voltage difference, the plurality of voltage difference is at interior generation the first electric field of liquid crystal layer 24.The orientation under the effect of the first electric field of liquid crystal molecule in liquid crystal layer 24 changes, the situation of arranging according to liquid crystal molecule in liquid crystal layer 24, the deflection angle difference of the liquid crystal molecule of zones of different, make the refractive index of liquid crystal molecule present parabola shaped variation, and then the lens of formation centered by target, reach and make the lensed effect of liquid crystal layer 24 tool, thereby realize the object that focuses on or disperse.
Similarly, in order to accelerate to form the forming process of liquid crystal lens, this driving voltage also can adopt the mode of overdrive voltage, and its method and the first embodiment are similar, do not repeat them here.
Wherein, the production process of the second electric field is described below:
What on the second adjacent strip electrode 261, replace applies voltage V1 and no-voltage or reference voltage Vref.Like this, between the second adjacent strip electrode 261, form a voltage difference, and then produce the second electric field.Wherein, the direction of the second electric field is parallel or be parallel at least partly the initial arrangement direction of liquid crystal molecule, make liquid crystal molecule under the effect of the second electric field, acceleration is returned to initial arrangement direction, the situation of arranging according to liquid crystal molecule in liquid crystal layer 24, in the time of initial arrangement direction, the deflection angle of the liquid crystal molecule of zones of different is basically identical, and liquid crystal layer 24 no longer has lens effect.Can omit by the way face electrode and dielectric layer, reduce processing procedure operation.
Be appreciated that the driving method shown in Figure 11 also can be combined with the liquid crystal lens shown in Fig. 5 and driving method thereof, optimize the return action of the second electric field to liquid crystal molecule.Namely, by higher voltage V
hlower voltage V
land no-voltage or reference voltage Vref to be applied to second strip electrode 261 (as odd number the second strip electrode 261) at interval upper, no-voltage or reference voltage Vref are applied on second strip electrode 261 (as even number the second strip electrode 261) at other interval.The driving method of concrete driving process shown in being combined with Fig. 4 with above-mentioned Figure 11 is similar, does not repeat them here.
Refer to Fig. 6, Fig. 6 shows the structure of the 3rd preferred embodiment of liquid crystal lens provided by the invention.
In the present embodiment, liquid crystal lens comprises first substrate 31, the first electrode structure 32, the first both alignment layers 33, liquid crystal layer 34, the second both alignment layers 35, the second electrode structure 36 and second substrate 37 successively.
Wherein, the first electrode structure 32 is arranged on first substrate 31, comprises multiple the first strip electrodes 321.These the first strip electrode 321 spaces arrange and extend along the first bearing of trend D1.
The second electrode structure 36 is arranged on second substrate 37, comprises multiple the second strip electrodes 361.These the second strip electrode 361 spaces arrange and extend along the second bearing of trend D2.In the 3rd preferred embodiment, the first bearing of trend D1 is parallel with the second bearing of trend D2.
Liquid crystal layer 34 is arranged between the first electrode structure 32 and the second electrode structure 36, and the first both alignment layers 33 is arranged between liquid crystal layer 34 and the first electrode structure 32, and the second both alignment layers 35 is arranged between liquid crystal layer 34 and the second electrode structure 36.
In liquid crystal layer 34, include the liquid crystal molecule of arranging along initial arrangement direction.The first both alignment layers 33 and the second both alignment layers 35 cooperatively interact so that liquid crystal molecule is arranged along initial arrangement direction.The alignment direction D4 of the alignment direction D3 of the first both alignment layers 33 and the second both alignment layers 35 and the first bearing of trend D1 intersect, and the initial arrangement direction of liquid crystal molecule and the first bearing of trend D1 are intersected.Preferably, the initial arrangement direction of liquid crystal molecule is vertical with the first bearing of trend D1.
Preferably, first substrate 31 and second substrate 37 are glass substrate, can certainly be the transparency carriers of other material, as long as light can be seen through, do not enumerate herein.
Preferably, the first strip electrode 321 and the second strip electrode 361 are transparency conducting layer, for example can be indium tin oxide (Indium Tin Oxide, ITO) or indium-zinc oxide (Indium Zinc Oxide, IZO), do not enumerate herein.
The principle of work of the 3rd preferred embodiment is described below:
Refer to Fig. 7, on the first strip electrode 321, apply voltage V1 and V2, wherein, two V1 in Fig. 6 are with respect to V2 symmetry, to ensure that liquid crystal layer 34 forms a good lens effect.In specific implementation process, all apply no-voltage or reference voltage Vref at the second strip electrode 361, between the first strip electrode 321 and the second strip electrode 361, form a voltage difference thus, and then produce the first electric field.The orientation under the effect of the first electric field of liquid crystal molecule in liquid crystal layer 34 changes, the situation of arranging according to liquid crystal molecule in liquid crystal layer 34, the deflection angle difference of the liquid crystal molecule of zones of different, make the refractive index of liquid crystal molecule present parabola shaped variation, and then the lens of formation centered by V1 or V2, reach and make the lensed effect of liquid crystal layer 34 tool, thereby realize the object focusing on.
Fig. 7 is shown in 3 the first strip electrodes 321 and applies corresponding voltage only for the forming process of explanation lens, is not construed as limiting the invention, and according to the parameter of required lens, can suitable adjustment executes number and the magnitude of voltage of alive the first strip electrode 321.For example in the ordinary course of things, the number of the first strip electrode 321 is chosen as odd number, applies first strip electrode 321 symmetries of voltage with centre, from forming the lens arrangement with target symmetry; Certainly, also can select the number of the first strip electrode 221 is even number, applies two first strip electrode 321 symmetries of voltage with centre, from forming the lens arrangement with middle two the first strip electrode 321 symmetries.
In the 3rd preferred embodiment, in order to accelerate the focal time of liquid crystal lens, preferably adopt the overdrive scheme identical with the first preferred embodiment.Namely, voltage difference between the first strip electrode 321 and the second strip electrode 361 comprises that the overdrive voltage that makes liquid crystal layer 34 produce lens effect is poor and makes liquid crystal layer 34 keep the steady voltage difference of lens effect, the wherein poor steady voltage difference that is greater than of overdrive voltage.
Refer to Fig. 8, alternately apply voltage V1 and no-voltage or reference voltage Vref at the first adjacent strip electrode 321, also alternately apply voltage V1 and no-voltage or reference voltage Vref at the second adjacent strip electrode 361, between the first adjacent strip electrode 321 and between the second adjacent strip electrode 361, forming respectively voltage difference thus simultaneously.This voltage difference produces the second electric field at liquid crystal layer 34.Parallel or the partial parallel of the direction of this second electric field is in the initial arrangement direction of liquid crystal molecule, make liquid crystal molecule under the effect of the second electric field, acceleration returns back to the initial arrangement direction of liquid crystal molecule, the situation of arranging according to liquid crystal molecule in liquid crystal layer 34, the deflection angle of the liquid crystal molecule of zones of different is basically identical, and liquid crystal layer 34 no longer has lens effect.Certainly, those skilled in the art only can expect completely between the first strip electrode 321 or only form above-mentioned voltage difference also can realize above-mentioned purpose between the second strip electrode 361.
Be appreciated that, driving method shown in Figure 11 also can with Fig. 8 driving method combine, only between the first strip electrode 321, adopt the driving method shown in Figure 11, also can between the second strip electrode 361, adopt the driving method shown in Figure 11, certainly also can, simultaneously adopt the driving method shown in Figure 11 between the first strip electrode 321 and between the second strip electrode 361 simultaneously, not repeat them here.
In more preferred embodiment, the first electrode structure 32 further comprises the first highly resistant material layer 322 being arranged between the first strip electrode 321.The second electrode structure 36 further comprises the second highly resistant material layer 362 being arranged between the second strip electrode 361.Use the first highly resistant material layer 322 and the second highly resistant material layer 362 can make the distribution of electric field more even.Those skilled in the art can expect that highly resistant material layer can be only between the first strip electrode 321 or only between the second strip electrode 361 completely.Highly resistant material layer is equally applicable to above-mentioned the first and second preferred embodiments.
Refer to Fig. 9, in the 3rd preferred embodiment, the second electrode structure 36 can also comprise face electrode 363 and dielectric layer 364, face electrode 363 is arranged between the second strip electrode 361 and second substrate 37, and arrange with the second electrode structure 36 insulation, in the middle of face electrode 363 and the second strip electrode 361, dielectric layer 364 is set.In specific implementation process, can produce the second electric field by forming voltage difference at the second strip electrode 361 with face electrode 363, to accelerate the reply of liquid crystal molecule.The process of concrete formation the second electric field, incorporated by reference to the description about Fig. 4 in Fig. 4 and the first preferred embodiment, repeats herein no longer one by one.Those skilled in the art can expect completely at the interior installation surface electrode of the first electrode structure 31 and dielectric layer.
3D display device shown in above-mentioned Fig. 1-Fig. 9 can be applied in various electronics, computer system, particularly its current smart mobile phone, panel computer, notebook computer etc. are integrated with the electronic installation of processing processor module, processor module combines with 3D display module, it has powerful calculating and display capabilities, can carry out various instructions and carry out the relevant operation of 3D display device of unifying with department of computer science, thereby show experience for user provides comfortable 3D.
Refer to Figure 10, Figure 10 shows the flow process of the control method of the liquid crystal lens that the embodiment of the present invention provides.
In step S1001, one first electric field is provided, this first electric field, for changing the orientation of liquid crystal molecule, makes liquid crystal layer in the first state, and under the first state, liquid crystal layer has lens effect;
In step S1002, one second electric field is provided, this second electric field is used for making liquid crystal molecule to be returned to initial arrangement direction; Wherein, in the time of initial arrangement direction, liquid crystal layer does not have lens effect.
Preferably, the direction of this second electric field is parallel at least partly with the initial arrangement direction of liquid crystal molecule, wherein, and the orientation of initial arrangement direction liquid crystal molecule when the first electric field is not provided.
The initial arrangement direction of utilizing the second electric field that liquid crystal molecule is returned to be determined by alignment direction has been described in the above-described embodiments, but the present invention be confined to this.
In other embodiments, make liquid crystal molecule in first order state by producing the first electric field.Now, liquid crystal molecule is in the first optical states, thereby makes liquid crystal layer have lens effect.Make liquid crystal molecule in second order state by producing the second electric field.Now, liquid crystal molecule is in the second optical states, thereby makes liquid crystal layer not have lens effect.It should be noted that, in other embodiments, the effect of the second electric field is not limited only to make the orientation of liquid crystal molecule to be returned to the initial arrangement direction while not applying electric field, also can be to make liquid crystal molecule in a kind of other ordered state, as long as can eliminate the lens effect of liquid crystal layer, and the effect that can make light propagate according to original direction, is all included among spirit of the present invention, will not enumerate at this.
Refer to above about the description of the first preferred embodiment, the second preferred embodiment and the 3rd preferred embodiment about the control method detailed process of liquid crystal lens, repeat no more herein.
The embodiment of the present invention also provides a kind of 3D display device, this 3D display device comprises the liquid crystal lens that the embodiment of the present invention provides, wherein, liquid crystal lens comprises two spaced electrode structures, also comprise and be arranged at two liquid crystal layers between electrode structure, liquid crystal layer comprises multiple liquid crystal molecules of arranging along initial arrangement direction.
In specific implementation process, in 3D display device, the electrode structure of liquid crystal lens produces the first electric field, and the first electric field is for changing the orientation of liquid crystal molecule, so that liquid crystal layer has lens effect; Electrode structure also produces the second electric field, and the second electric field is used for making liquid crystal molecule to be returned to initial arrangement direction, and under initial arrangement direction, liquid crystal layer does not have lens effect.
In view of the liquid crystal lens in 3D display device is described later in detail above, repeat no more herein.
The embodiment of the present invention greatly reduces the response time of liquid crystal lens, has especially shortened the liquid crystal molecule in liquid crystal layer and has been returned to the time of non-lens effect state, and then improved greatly the efficiency of liquid crystal lens, is beneficial to the popularization of liquid crystal lens.
In the above-described embodiments, only the present invention has been carried out to exemplary description, but those skilled in the art are reading after present patent application and can carry out various amendments to the present invention without departing from the spirit and scope of the present invention.
Claims (9)
1. a liquid crystal lens, is characterized in that, comprising:
Two spaced electrode structures;
Liquid crystal layer, is arranged between described two electrode structures, and comprises multiple liquid crystal molecules of arranging along initial arrangement direction;
Wherein, described electrode structure produces the first electric field, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer has lens effect;
Described electrode structure further produces the second electric field, the direction of described the second electric field is parallel at least partly with the initial arrangement direction of described liquid crystal molecule, be used for making described liquid crystal molecule to be returned to initial arrangement direction, liquid crystal molecule is in the time of described initial arrangement direction, described liquid crystal layer does not have lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
2. liquid crystal lens as claimed in claim 1, is characterized in that, the electric field of described very first time section is held time and is greater than the electric field of described the second time period and holds time.
3. liquid crystal lens as claimed in claim 1, it is characterized in that, described two electrode structures comprise the first electrode structure and the second electrode structure, described the first electrode structure comprises multiple the first strip electrodes that space arranges and extend along the first bearing of trend, described the second electrode structure comprises multiple the second strip electrodes that space arranges and extend along the second bearing of trend, wherein said the first bearing of trend intersects with described the second bearing of trend, produce described the first electric field by form voltage difference between described the first strip electrode and described the second strip electrode, produce described the second electric field by form voltage difference between described multiple the second strip electrodes.
4. liquid crystal lens as claimed in claim 1, it is characterized in that, described two electrode structures comprise the first electrode structure and the second electrode structure, described the first electrode structure comprises multiple the first strip electrodes that space arranges and extend along the first bearing of trend, described the second electrode structure comprises multiple the second strip electrodes that space arranges and extend along the second bearing of trend, wherein said the first bearing of trend is parallel with described the second bearing of trend, produce described the first electric field by form voltage difference between described the first strip electrode and described the second strip electrode, by between described multiple the first strip electrodes and/or form voltage difference between described multiple the second strip electrode and produce described the second electric field.
5. liquid crystal lens as claimed in claim 4, it is characterized in that, described the first electrode structure further comprises the first highly resistant material layer being arranged between described the first strip electrode, and/or described the second electrode structure further comprises the second highly resistant material layer being arranged between described the second strip electrode.
6. a control method for liquid crystal lens, is characterized in that, comprising:
One first electric field is provided, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer produces lens effect;
One second electric field is provided, the direction of described the second electric field is parallel at least partly with the initial arrangement direction of described liquid crystal molecule, be used for making described liquid crystal molecule to be returned to initial arrangement direction, wherein, described liquid crystal molecule is in the time of described initial arrangement direction, described liquid crystal layer does not have lens effect, and described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
7. a control method for liquid crystal lens, is characterized in that, comprising:
One first electric field is provided, and described the first electric field is used for making liquid crystal molecule in first order state, and described first order state is to make described liquid crystal layer have the ordered state of the liquid crystal molecule of lens effect;
One second electric field is provided, the direction of described the second electric field is parallel at least partly with the initial arrangement direction of described liquid crystal molecule, be used for making liquid crystal molecule in second order state, described second order state is to make described liquid crystal layer not have the ordered state of the liquid crystal molecule of lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
8. a 3D display device, is characterized in that, described device comprises liquid crystal lens, and described liquid crystal lens comprises:
Two spaced electrode structures;
Liquid crystal layer, is arranged between described two electrode structures, and comprises multiple liquid crystal molecules of arranging along initial arrangement direction;
Wherein, described electrode structure produces the first electric field, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer has lens effect;
Described electrode structure further produces the second electric field, the direction of described the second electric field is parallel at least partly with the initial arrangement direction of described liquid crystal molecule, be used for making described liquid crystal molecule to be returned to initial arrangement direction, under described initial arrangement direction, described liquid crystal layer does not have lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
9. a computer system, comprising:
Processor, it is configured to carry out instruction and carries out the operation relevant to computer system;
3D display device, it is operatively coupled to described processor, and described 3D display device comprises:
Two spaced electrode structures;
Liquid crystal layer, is arranged between described two electrode structures, and comprises multiple liquid crystal molecules of arranging along initial arrangement direction;
Wherein, described electrode structure produces the first electric field, and described the first electric field is for changing the orientation of described liquid crystal molecule, so that described liquid crystal layer has lens effect;
Described electrode structure further produces the second electric field, described the second electric field is used for making described liquid crystal molecule to be returned to initial arrangement direction, under described initial arrangement direction, described liquid crystal layer does not have lens effect, wherein, described the second electric field at least comprises electric field and the electric field of the second time period of very first time section, and the electric field intensity of described very first time section is greater than the electric field intensity of described the second time period; Described the second electric field also comprises the electric field of the 3rd time period, and the voltage of electric field of described the 3rd time period is down to no-voltage or reference voltage.
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| CN102707344A (en) * | 2012-03-26 | 2012-10-03 | 京东方科技集团股份有限公司 | 3D (three-dimensional) display device, lens panel and manufacturing method thereof |
| CN103217818B (en) * | 2013-03-19 | 2014-01-01 | 清华大学 | Method for increasing response speed of phase-control silicon-based liquid crystal device |
| CN103197455B (en) * | 2013-03-19 | 2014-01-01 | 清华大学 | Method for increasing responding speed of phase only liquid crystal on silicon device |
| CN103207484B (en) * | 2013-03-28 | 2015-07-29 | 京东方科技集团股份有限公司 | A kind of 3D glasses and driving method thereof |
| TWI495926B (en) * | 2013-07-08 | 2015-08-11 | Au Optronics Corp | Lc lens device and method for driving lc lens |
| CN103698957B (en) * | 2013-12-31 | 2016-06-22 | 信利半导体有限公司 | The zoom drive method of liquid crystal lens |
| CN103728810A (en) * | 2013-12-31 | 2014-04-16 | 信利半导体有限公司 | Zooming driving method of liquid crystal lens |
| CN104298027B (en) * | 2014-10-24 | 2017-09-15 | 华中科技大学 | Infrared beams control chip based on electrically-controlled liquid crystal infrared divergence planar microlenses |
| CN104298030B (en) * | 2014-10-24 | 2017-05-10 | 华中科技大学 | Infrared beam control chip based on electric control liquid crystal infrared convergence planar micro-cylindrical-lens |
| CN104330930B (en) * | 2014-11-05 | 2017-05-10 | 华中科技大学 | Infrared light-concentrating chip |
| CN104330931B (en) * | 2014-11-05 | 2017-04-26 | 华中科技大学 | Infrared liquid crystal phased array chip |
| CN106847208B (en) * | 2017-01-13 | 2020-11-17 | 京东方科技集团股份有限公司 | Liquid crystal display and driving method thereof |
| WO2018132980A1 (en) * | 2017-01-18 | 2018-07-26 | 张家港康得新光电材料有限公司 | Display device |
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