CN101968595B - 2D/3D switching liquid crystal lens assembly and display device - Google Patents
2D/3D switching liquid crystal lens assembly and display device Download PDFInfo
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- CN101968595B CN101968595B CN2010105124214A CN201010512421A CN101968595B CN 101968595 B CN101968595 B CN 101968595B CN 2010105124214 A CN2010105124214 A CN 2010105124214A CN 201010512421 A CN201010512421 A CN 201010512421A CN 101968595 B CN101968595 B CN 101968595B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 260
- 230000005684 electric field Effects 0.000 claims abstract description 19
- 230000010287 polarization Effects 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 14
- 239000002245 particle Substances 0.000 abstract 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 16
- 239000011521 glass Substances 0.000 description 11
- 239000000758 substrate Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 210000004556 brain Anatomy 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/291—Two-dimensional analogue deflection
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/294—Variable focal length devices
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Abstract
The invention discloses an automatic stereoscopic display device and a liquid crystal lens assembly, wherein the liquid crystal lens assembly sequentially comprises a concave lens, a birefringence liquid crystal convex lens and an electrode layer. The liquid crystal convex lens is embedded in the concave lens and has an ordinary light refraction index and an extraordinary light refraction index, and an electric field generated by a plurality of control electrodes of the electrode layer can adjust the orientation of liquid crystal particles of the liquid crystal convex lens to adjust the equivalent refraction index thereof so that the equivalent refraction index is between the refraction index of the concave lens and the refraction index of the birefringence liquid crystal convex lens. The invention aims to compensate the need of the human eyes for a light refraction angle when observing the automatic stereoscopic display device at different distances. In addition, the extraordinary light refraction index is far lager than the ordinary light refraction index, i.e. incoming polarized light acquires a large refraction index change when the liquid crystal particles turn at a small angle so as to achieve the 2D and 3D switching aim. The rotation of switching at a small angle can be finished by only needing a small electric field so as to reduce electricity consumption.
Description
Technical field
The present invention relates to a kind of display device, espespecially a kind of liquid crystal lens assembly and display device thereof of 2D/3D switching.
Background technology
The mankind see through the prospect that eyes see and the image that perceives real world.And the mankind's brain can be further sees that according to eyes the space length difference between the prospect of two different angles forms so-called 3 dimension (3-dimension, 3D) images.This space length difference is called as parallax (parallax).So-called 3D display device is exactly the visual field of simulating human eyes different angles, allows images of left and right eyes receive respectively two 2D images of parallax, after making human brain obtain the different 2D images that images of left and right eyes sees, can be perceived as the 3D image.
Current 3D display device mainly is divided into two classes, is respectively autostereoscopic display apparatus (Auto-stereoscopic display) and non-automatic 3 d display device (Stereoscopic display).The user of autostereoscopic display apparatus need not put on the glasses of special construction just can find out the 3D stereopsis.Another kind of non-automatic 3 d display device needs the user to put on special glasses, just can see the 3D stereopsis.Common autostereoscopic display apparatus has two kinds: slit grating formula autostereoscopic display apparatus and microlens array formula 3 d display device.The principle of slit grating formula autostereoscopic display apparatus is to rely on lighttight disparity barrier (parallax barrier) to allow user's right and left eyes see the image with parallax, and this parallax will form stereoscopic sensation in brain.As for microlens array formula 3 d display device, be use lens subassembly as a lenticular lenses (Lenticular Lens) and be attached on liquid crystal panel, this lens subassembly is agreed with and is formed by single refraction rate microlens array and birefraction lenticule array.The material of this birefraction microlens array is liquid crystal.Utilization puts on the lenticular electric field change of birefraction, makes the arrangement of liquid crystal molecule be transformed into vertical direction by horizontal direction, and its refractive index is by ordinary refraction index n
obecome the non-optical index n that seeks
e.Thus, the light that is incident to this lens subassembly has different light directions because of the lenticular refractive index change of birefringence (Birefringence) rate.By this principle, the observer can see the light of two kinds of different refraction angles, so can reach the switching of 2D/3D image.Yet, the conventional lenses assembly is that two-layer control electrode is placed on respectively to the lenticular upper/lower terminal of this birefraction, and poor the produced electric field of the driving voltage that utilizes this two-layer control electrode is adjusted to vertical direction by liquid crystal molecule by horizontal direction, in general this driving voltage is poor reach 5V more than.If therefore can make a kind of low driving voltage lens subassembly for the switching of 2D/3D image, will more meet the demand of environmental protection.
Summary of the invention
Therefore the liquid crystal lens assembly and the display device thereof that the purpose of this invention is to provide a kind of 2D/3D switching, this liquid crystal lens assembly is to utilize to be positioned at the electric field that the control electrode on an electrode layer produces, adjust the refractive index of birefraction convex lens, to solve the problem of background technology.
The invention provides a kind of display device of 2 dimension/3 dimension show image switchings, comprise a backlight module, a liquid crystal panel and a liquid crystal lens assembly, described backlight module is for generation of light, described liquid crystal panel is used for according to the light show image of described backlight module generation, and the light that described liquid crystal panel transmits is polarized light.Described liquid crystal lens assembly sequentially comprises the strip concavees lens of a plurality of adjacent arrangements and the strip liquid crystal convex lens of a plurality of adjacent arrangements from exiting surface to incidence surface.The strip liquid crystal convex lens of described a plurality of adjacent arrangements, the corresponding described a plurality of concavees lens of one one, described a plurality of strip liquid crystal convex lens comprise a transparency carrier, one is positioned at the electrode layer on this transparency carrier, and one first liquid crystal layer, this first liquid crystal layer is sandwiched between these concavees lens and transparency carrier.This electrode layer comprises a plurality of control electrodes, described a plurality of control electrode to adjust its equivalent refractive index, makes the equivalent refractive index of described liquid crystal convex lens be equal to, or greater than the first refractive rate of described concavees lens for the orientation of liquid crystal molecule of controlling described birefringence liquid crystal convex lens.
The present invention separately provides a kind of liquid crystal lens assembly, and it sequentially comprises the strip concavees lens of a plurality of adjacent arrangements and the strip liquid crystal convex lens of a plurality of adjacent arrangements from exiting surface to incidence surface.The strip liquid crystal convex lens of described a plurality of adjacent arrangements, the corresponding described a plurality of concavees lens of one one, described a plurality of strip liquid crystal convex lens comprise a transparency carrier, one is positioned at the electrode layer on this transparency carrier, and one first liquid crystal layer, this first liquid crystal layer is sandwiched between these concavees lens and transparency carrier.This electrode layer comprises a plurality of control electrodes, described a plurality of control electrode to adjust its equivalent refractive index, makes the equivalent refractive index of described liquid crystal convex lens be equal to, or greater than the first refractive rate of described concavees lens for the orientation of liquid crystal molecule of controlling described birefringence liquid crystal convex lens.
According to embodiments of the invention, the refractive index of described concavees lens equals the ordinary refraction index of the liquid crystal molecule of described the first liquid crystal layer.
According to embodiments of the invention, described control electrode is strip, and its bearing of trend is consistent with described strip liquid crystal convex lens bearing of trend.This liquid crystal lens assembly coordinates linearly polarized photon to use, and described a plurality of strip liquid crystal convex lens extend along a first direction, and, along a second direction arrangement, this first direction is perpendicular to this second direction, and the polarization direction of described polarized light is perpendicular to first direction.Described liquid crystal convex lens further comprise that one is arranged at the alignment film on surface of close described first liquid crystal layer of described transparency carrier, and this alignment film makes the liquid crystal molecule of described the first liquid crystal layer when being not applied to electric field, and optical axis is parallel to described first direction.The liquid crystal molecule of described the first liquid crystal layer is that optical axis direction can be along the positivity liquid crystal that is parallel to the direction of an electric field arrangement, and the liquid crystal molecule of described the first liquid crystal layer is when being applied in electric field, and optical axis and first direction are angled.
According to embodiments of the invention, the ordinary refraction index that the extraordinary ray refractive index of the liquid crystal molecule of described the first liquid crystal layer is greater than 1.2 times.
According to embodiments of the invention, described concavees lens are a pair of refraction liquid crystal concavees lens, and it comprises one second liquid crystal layer, and this liquid crystal layer comprises the liquid crystal molecule of a plurality of orientations perpendicular to described transparency carrier.
According to embodiments of the invention, described concavees lens are a pair of refraction liquid crystal concavees lens, and it comprises one second liquid crystal layer, and this liquid crystal layer comprises that a plurality of orientations are parallel to the liquid crystal molecule of described transparency carrier.
Compared to prior art, display device of the present invention can see through the liquid crystal molecule rotational angle that driving voltage is controlled the liquid crystal convex lens, and the equivalent refractive index that can change the liquid crystal convex lens is with the refringence of the refractive index of dynamically adjusting this equivalence refractive index and concavees lens.When its purpose is to compensate the eye-observation display device apart from difference, the demand of anaclasis angle.In addition, allow the extraordinary ray refractive index of liquid crystal convex lens much larger than ordinary refraction index, when liquid crystal molecule rotates a few degrees, incident polarized light just obtains the purpose that larger variations in refractive index reaches the 3D/2D switching.This rotates also representative once the switching a few degrees needs less electric field to reach, and indirectly can save the consumption of electric power.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and coordinate appended graphicly, be described in detail below:
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the display device of demonstration 3-dimensional image of the present invention.
Fig. 2 is the orientation of liquid crystal molecule and the schematic diagram of incident polarization light polarization direction.
The light path schematic diagram of polarized light when Fig. 3 illustrates the section of liquid crystal lens assembly of the first embodiment of Fig. 1 and the liquid crystal molecule in convex lens and do not change orientation.
Fig. 4 illustrates the light path schematic diagram that the section of liquid crystal lens assembly of the first embodiment of Fig. 1 and the liquid crystal molecule in convex lens change the incident polarized light after orientation.
The light path schematic diagram of polarized light when Fig. 5 illustrates the section of liquid crystal lens assembly of the second embodiment and the liquid crystal molecule in convex lens and do not change orientation.
Fig. 6 illustrates the light path schematic diagram that the section of liquid crystal lens assembly of the second embodiment and the liquid crystal molecule in convex lens change the incident polarized light after orientation.
The light path schematic diagram of polarized light when Fig. 7 illustrates the section of liquid crystal lens assembly of the 3rd embodiment and the liquid crystal molecule in convex lens and do not change orientation.
Fig. 8 illustrates the light path schematic diagram that the section of liquid crystal lens assembly of the 3rd embodiment and the liquid crystal molecule in convex lens change the incident polarized light after orientation.
Embodiment
Below the explanation of each embodiment be with reference to additional graphic, can be in order to the specific embodiment of enforcement in order to illustration the present invention.The direction term that the present invention mentions, such as " on ", D score, 'fornt', 'back', " left side ", " right side ", " top ", " end ", " level ", " vertically " etc., be only the direction with reference to annexed drawings.Therefore, the direction term of use is in order to illustrate and to understand the present invention, but not in order to limit the present invention.
Refer to Fig. 1, Fig. 1 is the schematic diagram of the display device 100 of demonstration 3-dimensional image of the present invention.When the user watches display device 100, can switch and watch 2D or 3D image.Display device 100 comprises backlight module 102, liquid crystal panel 110, is positioned at the polaroid of liquid crystal panel 110 both sides (polarizer film) 114,115 and liquid crystal lens assembly 120.Backlight module 102 provides uniform area source for this liquid crystal panel.Liquid crystal panel 110 provides liquid crystal material between a pair of transparent glass substrate, and lay transparent indium tin oxide on glass substrate (Indium Tin Oxide, ITO) as conductive electrode.Liquid crystal panel 110 comprises the pel array be comprised of a plurality of pixels 112, the backlight illumination produced when backlight module 102, on display panels 110, shows different GTGs by the rotation direction that drives pixel 112 can adjust the liquid crystal molecule of corresponding each pixel in order to adjust the intensity of ejaculation backlight.Liquid crystal panel 110 is between polaroid 114,115, and polaroid 114,115 polarizing axis direction each other differs 90 °.Polaroid 114,115 can make the light of transmission only have corresponding polarizing axis direction according to the angle of its polarizing axis.The present invention be take the polarization of light direction that penetrates from polaroid 115 and is parallel to the B direction and describes as example, but is not limited to this.
Refer to Fig. 1 to Fig. 3, Fig. 2 is the orientation of liquid crystal molecule and the schematic diagram of incident polarization light polarization direction.The light path schematic diagram of polarized light when the liquid crystal lens assembly 120 that Fig. 3 illustrates the first embodiment of Fig. 1 does not change orientation from the liquid crystal molecules in the sectional view of direction shown in Fig. 1 arrow A and convex lens 122.Liquid crystal lens assembly 120 sequentially comprises transparent glass substrate 121a, several strip concavees lens 124 parallel to each other and that extend towards first direction A and several parallel to each other and extend and the strip liquid crystal convex lens 122 of corresponding chimeric concavees lens 124 one by one towards first direction A from exiting surface 132 to incidence surface 130.Liquid crystal convex lens 122 comprise that a transparency carrier 121b, is positioned at electrode layer 123 and one first liquid crystal layer on transparent glass substrate 121b, and this first liquid crystal layer is sandwiched between concavees lens 124 and transparent glass substrate 121b.Each strip concave lens 124 and each strip liquid crystal convex lens 122 are to arrange towards second direction B, and first direction A is perpendicular to one another with second direction B.In another embodiment, liquid crystal lens assembly 120 does not need transparent glass substrate 121a, only need to get final product at the bright dipping side coating diaphragm of concavees lens 124.
Electrode layer 123 comprises a plurality of parallel elongate control electrodes, between two elongated control electrodes, leaves a gap.The top of electrode layer 123 can arrange an alignment film (not shown), and this alignment film is used for making liquid crystal molecule to arrange along specific direction when being not applied to electric field.Liquid crystal convex lens 122 are birefringence convex lens.The first liquid crystal layer of liquid crystal convex lens 122 has the first ordinary refraction index n
owith the first extraordinary ray refractive index n
e.Optical axis direction when the polarization direction of the polarized light of incident convex lens 122 perpendicular to liquid crystal molecule, now, for the polarized light of incident, convex lens 122 have the first ordinary refraction index n
o.When the polarization direction of the polarized light of incident convex lens 122 is parallel to the optical axis direction of liquid crystal molecule, now, for the polarized light of incident, convex lens 122 have the first extraordinary ray refractive index n
e.In the present embodiment, the refractive index n of concavees lens 124 equals this first ordinary refraction index n
o.As shown in Figure 3, when between two elongated control electrodes of electrode layer 123, not bestowed driving voltage, the orientation meeting of the liquid crystal molecule between this two elongated control electrode because of the effect of alignment film perpendicular to the paper direction.The polarization direction of polarized light of being injected liquid crystal convex lens 122 by polaroid 115 via incidence surface 130 is vertical with the optical axis of liquid crystal molecule.Because the refractive index n of concavees lens 124 equals the first ordinary refraction index n of these liquid crystal convex lens 122
oso, for the polarized light of injecting liquid crystal convex lens 122, between liquid crystal convex lens 122 and concavees lens 124, without refringence, so light can be along rectilinear propagation, therefore can see the 2D image the observer of exiting surface 132 1 sides.
Refer to Fig. 4, Fig. 4 illustrates the light path schematic diagram that the section of liquid crystal lens assembly 120 of the first embodiment of Fig. 1 and the liquid crystal molecule in convex lens 122 change the incident polarized light after orientation.When between two elongated control electrodes of electrode layer 123, being bestowed driving voltage, the liquid crystal molecule between this two elongated control electrode rotates.From polaroid 115, penetrate the polarization direction of polarized light be an angle θ with the fast axle (i.e. the direction vertical with optical axis) of liquid crystal molecule, while liquid crystal convex lens 122 have equivalent refractive index n
eff.When driving voltage increases, this angle θ also can be larger, until angle θ equals 90 while spending, for this polarized light, the refractive index of these liquid crystal convex lens 122 is this first extraordinary ray refractive index n
e.In fact, angle θ is at the equivalent refractive index n of 0 °～90 °
effequivalent refractive index n with 90 °～180 °
effbe corresponding, for instance, angle θ is at the equivalent refractive index n of 45 ° and 135 °
effidentical.That is to say the first ordinary refraction index n
o(angle θ=0 °) and the first extraordinary ray refractive index n
ethe refringence of (angle θ=90 °) is maximum.So equivalent refractive index n of liquid crystal convex lens 122
effbetween the first ordinary refraction index n
owith the first extraordinary ray refractive index n
ebetween.Because the equivalent refractive index n of liquid crystal convex lens 122
effbe greater than the refractive index n (=n of concavees lens 124
o), so this polarized light enters optically thinner medium by optically denser medium, thus the polarized light of injecting can at the junction place of liquid crystal convex lens 122 and concavees lens 124, occur reflect and focus on human eye, therefore can see the 3D image the observer of exiting surface 132 1 sides.
Separately, the present embodiment can be adjusted the driving voltage size between the two elongated control electrodes that put on electrode layer 123, makes angle θ between the fast axle of the polarization direction of the polarized light of injecting and liquid crystal molecule and the equivalent refractive index n of liquid crystal convex lens 122
effalso adjust thereupon.Thus, the equivalent refractive index n of liquid crystal convex lens 122
effalso can change with the refringence of the refractive index n of concavees lens 124, make the polarized light of injecting also slightly variant at the refractive direction of liquid crystal convex lens 122 and concavees lens 124.That is to say, the distance between observer and exiting surface 132 is D1 and D2 respectively, utilizes the mode of adjusting driving voltage to change the equivalent refractive index n of liquid crystal convex lens 122
effafter, still can watch clear and lifelike 3D image.In addition, when selecting the liquid crystal material of convex lens 122, can select the first extraordinary ray refractive index n
emuch larger than the first ordinary refraction index n
oliquid crystal, n for example
e>=1.2 * n
o.At this moment, as long as minimum driving voltage just can produce certain electric field and rotate special angle by liquid crystal molecule, and the polarized light that makes incident two-layer lens larger through variations in refractive index are to allow display device 100 reach the purpose of 2D/3D switching, the consumption that therefore can save electric power.
In Fig. 3, Fig. 4, liquid crystal convex lens 122 adopt the positivity liquid crystal, that is to say, when two elongated control electrodes of electrode layer 123 produce the electric field of direction as shown in the arrow B (that is Fig. 1 arrow B) of Fig. 3, the liquid crystal arrangement direction of liquid crystal convex lens 122 is to be parallel to direction of an electric field.In another embodiment, liquid crystal convex lens 122 also can adopt negative liquid crystal.In this embodiment, arranging along the A direction of slender electrode, extend along the B direction.
Refer to Fig. 5, the light path schematic diagram of polarized light when Fig. 5 illustrates the section of liquid crystal lens assembly 220 of the second embodiment and the liquid crystal molecules in convex lens 222 and do not change orientation.Liquid crystal lens assembly 220 sequentially comprises transparent glass substrate 221a, several strip liquid crystal concavees lens 224 parallel to each other and that extend to extend towards first direction A and several parallel to each other and extend and the strip liquid crystal convex lens 222 of corresponding chimeric liquid crystal concavees lens 224 one by one towards first direction A from exiting surface 230 to incidence surface 232.Liquid crystal convex lens 222 comprise a transparency carrier 221b, are positioned at electrode layer 223 and one first liquid crystal layer on transparent glass substrate 221b, and this first liquid crystal layer is sandwiched between liquid crystal concavees lens 224 and transparent glass substrate 221b.Each strip liquid crystal concave lens 224 and each strip liquid crystal convex lens 222 are to arrange towards second direction B, and first direction A is perpendicular to one another with second direction B.With the liquid crystal lens assembly 220 difference parts of previous embodiment, be, liquid crystal concavees lens 224 have one second liquid crystal layer.When the optical axis direction of the liquid crystal molecule of this second liquid crystal layer is parallel to the direction of propagation (that is perpendicular to transparency carrier 221b) of incident light, it has the second ordinary refraction index n
o2.Liquid crystal convex lens 222 are birefringence convex lens.Birefringence liquid crystal convex lens 222 have the first ordinary refraction index n
o1with the first extraordinary ray refractive index n
e1.The second ordinary refraction index n of liquid crystal concavees lens 224
o2equal this first ordinary refraction index n
o1.As shown in Figure 5, when between two elongated control electrodes of electrode layer 223, not bestowed driving voltage, the orientation meeting of the liquid crystal molecule between this two elongated control electrode is perpendicular to the paper direction.The polarization direction of the polarized light of now being injected via incidence surface 230 by polaroid 115 is vertical with the optical axis of liquid crystal molecule.The first ordinary refraction index n due to liquid crystal convex lens 222
o1equal the second ordinary refraction index n of liquid crystal concavees lens 224
o2so, for injecting the polarized light of liquid crystal convex lens 222, between liquid crystal convex lens 222 and liquid crystal concavees lens 224, without refringence, so light can be along rectilinear propagation, therefore can see the 2D image the observer of exiting surface 232 1 sides.
Refer to Fig. 6, Fig. 6 illustrates the light path schematic diagram that the section of liquid crystal lens assembly 220 of the second embodiment and the liquid crystal molecule in convex lens 222 change the incident polarized light after orientation.When between two elongated control electrodes of electrode layer 223, being bestowed driving voltage, the liquid crystal molecule between this two elongated control electrode rotates.The polarization direction of the polarized light penetrated from polaroid 115 and the fast axle of liquid crystal molecule are an angle θ, and liquid crystal convex lens 222 have equivalent refractive index n simultaneously
eff.When driving voltage increases, this angle θ also can be larger, until angle θ equals 90 while spending, for this polarized light, the refractive index of these liquid crystal convex lens 222 is this first extraordinary ray refractive index n
e1.The equivalent refractive index n of liquid crystal convex lens 222
effbetween the first ordinary refraction index n
o1with the first extraordinary ray refractive index n
e1between.Because the equivalent refractive index n of liquid crystal convex lens 222
effbe greater than the second ordinary refraction index n of liquid crystal concavees lens 224
o2(=n
o1), so this polarized light enters optically thinner medium by optically denser medium, so the polarized light of injecting arrive human eye in can occurring at the junction place of liquid crystal convex lens 222 and liquid crystal concavees lens 224 reflect and reach, therefore can see the 3D image the observer of exiting surface 232 1 sides.
Separately, the present embodiment can be adjusted the driving voltage size between the two elongated control electrodes that put on electrode layer 223, makes angle θ between the fast axle of the polarization direction of the polarized light of injecting and liquid crystal molecule and the equivalent refractive index n of liquid crystal convex lens 222
effalso adjust thereupon.Thus, the equivalent refractive index n of liquid crystal convex lens 222
effthe second ordinary refraction index n with liquid crystal concavees lens 224
o2refringence also can change, make the polarized light of injecting also slightly variant at the refractive direction of liquid crystal convex lens 222 and liquid crystal concavees lens 224.That is to say, the distance between observer and exiting surface 232 is D1 and D2 respectively, utilizes the mode of adjusting driving voltage to change the equivalent refractive index n of liquid crystal convex lens 222
effafter, still can watch clear and lifelike 3D image.In addition, when selecting the liquid crystal material of convex lens 222, can select the first extraordinary ray refractive index n
e1much larger than the first ordinary refraction index n
o1liquid crystal, n for example
e1>=1.2 * n
o1.At this moment, as long as minimum driving voltage just can produce certain electric field and rotate special angle by liquid crystal molecule, the two-layer lens that polarized light of incident is larger with regard to the process variations in refractive index are to allow display device 100 reach the purpose of 3D/2D switching, so the consumption that can save electric power.
In Fig. 5, Fig. 6, liquid crystal convex lens 222 adopt the positivity liquid crystal, that is to say, when two elongated control electrodes of electrode layer 223 produce the electric field of direction as shown in the arrow B (that is Fig. 1 arrow B) of Fig. 5, the liquid crystal arrangement direction of liquid crystal convex lens 222 is to be parallel to direction of an electric field.In another embodiment, liquid crystal convex lens 222 also can adopt negative liquid crystal, and in this embodiment, arranging along the A direction of slender electrode, extend along the B direction.
Refer to Fig. 7 and Fig. 8, the light path schematic diagram of polarized light when Fig. 7 illustrates the section of liquid crystal lens assembly 320 of the 3rd embodiment and the liquid crystal molecules in convex lens 222 and do not change orientation.Fig. 8 illustrates the light path schematic diagram that the section of liquid crystal lens assembly 320 of the 3rd embodiment and the liquid crystal molecule in convex lens 222 change the incident polarized light after orientation.The assembly that Fig. 7 and Fig. 8 indicate and Fig. 5 and Fig. 6 have same numeral person, its function is identical, at this, does not separately repeat.The second liquid crystal layer of the birefringence liquid crystal concavees lens 224 of liquid crystal lens assembly 320 comprises that a plurality of orientations are parallel to the liquid crystal molecule of transparency carrier 221b, and namely the optical axis direction of liquid crystal molecule is parallel to the polarization direction of incident light.For this polarized light, it has the second extraordinary ray refractive index n
e2.Liquid crystal lens assembly 320 is with the difference of liquid crystal lens assembly 220, and the refractive index of the liquid crystal concavees lens 224 of liquid crystal lens assembly 320 is fixed as this second extraordinary ray refractive index n
e2.While showing stereopsis, as long as select the first ordinary refraction index n of liquid crystal convex lens 222
o1equal the second extraordinary ray refractive index n
e2, adjust afterwards the equivalent refractive index n of liquid crystal convex lens 222
effbetween the first ordinary refraction index n
o1with the first extraordinary ray refractive index n
e1between get final product.That is to say, as the equivalent refractive index n of liquid crystal convex lens 222
effbe matched with the second extraordinary ray refractive index n of liquid crystal concavees lens 224
e2, between liquid crystal convex lens 222 and liquid crystal concavees lens 224 without refringence, so light can be along rectilinear propagation, therefore can see the 2D image the observer of exiting surface 232 1 sides.Equivalent refractive index n when liquid crystal convex lens 222
effbe greater than the second extraordinary ray refractive index n of liquid crystal concavees lens 224
e2the time, this polarized light enters optically thinner medium by optically denser medium, and the polarized light of injecting can occur at the junction place of liquid crystal convex lens 222 and liquid crystal concavees lens 224 to reflect and focus on human eye, therefore can see the 3D image the observer of exiting surface 232 1 sides.
In sum; although the present invention discloses as above with preferred embodiment; but this preferred embodiment is not in order to limit the present invention; the those of ordinary skill in this field; without departing from the spirit and scope of the present invention; all can do various changes and retouching, so the scope that protection scope of the present invention defines with claim is as the criterion.
Claims (8)
1. a dimension/3 is tieed up the display device that show images switch, sequentially comprise a backlight module, a liquid crystal panel and a liquid crystal lens assembly, described backlight module is for generation of light, described liquid crystal panel is used for according to the light show image of described backlight module generation, the light that described liquid crystal panel transmits is polarized light, and it sequentially comprises this liquid crystal lens assembly from exiting surface to incidence surface:
The strip birefringence liquid crystal concavees lens of a plurality of adjacent arrangements;
The strip liquid crystal convex lens of a plurality of adjacent arrangements, the corresponding described a plurality of concavees lens of one one, described a plurality of strip liquid crystal convex lens comprise a transparency carrier, one is positioned at the electrode layer on this transparency carrier, and one first liquid crystal layer, this first liquid crystal layer is sandwiched between these concavees lens and transparency carrier;
It is characterized in that:
This electrode layer comprises a plurality of control electrodes, described control electrode is strip, its bearing of trend is consistent with described strip liquid crystal convex lens bearing of trend, put on the driving voltage size between described a plurality of control electrode by adjustment, control the orientation of liquid crystal molecule of described liquid crystal convex lens to adjust its equivalent refractive index, make the equivalent refractive index of described liquid crystal convex lens be equal to, or greater than the first refractive rate of described concavees lens, the ordinary refraction index that the extraordinary ray refractive index of the liquid crystal molecule of wherein said the first liquid crystal layer is greater than 1.2 times.
2. display device according to claim 1, it is characterized in that: the refractive index of described concavees lens equals the ordinary refraction index of the liquid crystal molecule of described the first liquid crystal layer.
3. display device according to claim 1, it is characterized in that: this liquid crystal lens assembly coordinates linearly polarized photon to use, and described a plurality of strip liquid crystal convex lens extend along a first direction, and arrange along a second direction, this first direction is perpendicular to this second direction, and the polarization direction of described polarized light is perpendicular to first direction.
4. display device according to claim 3, it is characterized in that: described liquid crystal convex lens further comprise that one is arranged at the alignment film on surface of close described first liquid crystal layer of described transparency carrier, this alignment film makes the liquid crystal molecule of described the first liquid crystal layer when being not applied to electric field, and optical axis is parallel to described first direction.
5. display device according to claim 4, it is characterized in that: the liquid crystal molecule of described the first liquid crystal layer is that optical axis direction can be along the positivity liquid crystal that is parallel to the direction of an electric field arrangement, the liquid crystal molecule of described the first liquid crystal layer is when being applied in electric field, and optical axis and first direction are angled.
6. display device according to claim 1 is characterized in that: described concavees lens are a pair of refraction liquid crystal concavees lens, and it comprises one second liquid crystal layer, and this second liquid crystal layer comprises the liquid crystal molecule of a plurality of orientations perpendicular to described transparency carrier.
7. display device according to claim 1 is characterized in that: described concavees lens are a pair of refraction liquid crystal concavees lens, and it comprises one second liquid crystal layer, and this second liquid crystal layer comprises that a plurality of orientations are parallel to the liquid crystal molecule of described transparency carrier.
8. a liquid crystal lens assembly, it sequentially comprises from exiting surface to incidence surface:
The strip concavees lens of a plurality of adjacent arrangements;
The strip liquid crystal convex lens of a plurality of adjacent arrangements, the corresponding described a plurality of concavees lens of one one, described a plurality of strip liquid crystal convex lens comprise a transparency carrier, one is positioned at the electrode layer on this transparency carrier, and one first liquid crystal layer, this first liquid crystal layer is sandwiched between these concavees lens and this transparency carrier;
It is characterized in that:
This electrode layer comprises a plurality of control electrodes, described control electrode is strip, its bearing of trend is consistent with described strip liquid crystal convex lens bearing of trend, put on the driving voltage size between described a plurality of control electrode by adjustment, control the orientation of liquid crystal molecule of described liquid crystal convex lens to adjust its equivalent refractive index, make the equivalent refractive index of described liquid crystal convex lens be equal to, or greater than the first refractive rate of described concavees lens, the ordinary refraction index that the extraordinary ray refractive index of the liquid crystal molecule of wherein said the first liquid crystal layer is greater than 1.2 times.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105124214A CN101968595B (en) | 2010-10-13 | 2010-10-13 | 2D/3D switching liquid crystal lens assembly and display device |
| PCT/CN2010/078755 WO2012048485A1 (en) | 2010-10-13 | 2010-11-15 | Two dimension/three dimension switchable liquid crystal lens assembly and display device |
| US12/996,998 US8582043B2 (en) | 2010-10-13 | 2010-11-15 | 2D/3D switchable LC lens unit for use in a display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105124214A CN101968595B (en) | 2010-10-13 | 2010-10-13 | 2D/3D switching liquid crystal lens assembly and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101968595A CN101968595A (en) | 2011-02-09 |
| CN101968595B true CN101968595B (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105124214A Expired - Fee Related CN101968595B (en) | 2010-10-13 | 2010-10-13 | 2D/3D switching liquid crystal lens assembly and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101968595B (en) |
| WO (1) | WO2012048485A1 (en) |
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| CN101968595A (en) | 2011-02-09 |
| WO2012048485A1 (en) | 2012-04-19 |
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