CN109870864A - Optical lens and preparation method thereof and optical device - Google Patents
Optical lens and preparation method thereof and optical device Download PDFInfo
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- CN109870864A CN109870864A CN201910242383.6A CN201910242383A CN109870864A CN 109870864 A CN109870864 A CN 109870864A CN 201910242383 A CN201910242383 A CN 201910242383A CN 109870864 A CN109870864 A CN 109870864A
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Abstract
Optical lens and preparation method thereof and optical device.The present invention provides liquid crystal lens and preparation method thereof and optical device, the liquid crystal lens include oriented layer and the upper substrate, liquid crystal layer and the lower substrate that are stacked, wherein, the oriented layer includes upper oriented layer and lower oriented layer, the upper oriented layer is arranged between the upper substrate and the liquid crystal layer, the lower oriented layer is arranged between the liquid crystal layer and the lower substrate, and the liquid crystal lens are divided into multiple orientation areas, and the differently- oriented directivity of the oriented layer in multiple orientation areas is different.It is orientated as a result, by region, it is only necessary to which the purpose of modulation natural light, while the thinner thickness of liquid crystal lens can be realized in one layer of liquid crystal cell, meets lightening development trend.
Description
Technical field
The present invention relates to liquid crystal optics technical fields, specifically, being related to optical lens and preparation method thereof and optical device.
Background technique
Liquid crystal display is the display device of current large-scale use, lightening with colour gamut height, and the response time is fast etc.
A series of advantage suffers from mature technology in terms of theoretical research and actual process.As people are to liquid crystal optics
Solution is goed deep into, and liquid crystal is also applied not only to display field, and the research of some liquid crystal optical devices is gradually goed deep into, including liquid
Brilliant lens, liquid crystal prism, liquid crystal Fresnel lens etc..
Since liquid crystal molecule is similar to the characteristic of uniaxial crystal, so most of liquid crystal optical device can only modulate single line
Polarised light, and natural light includes a variety of linearly polarized lights, and liquid crystal lens are directly applied under the conditions of natural light and are then much limited
System, therefore the liquid crystal optical device that can modulate natural light how is made as the Main way studied at present, current main side
Formula is to use dual-layered liquid crystal box structure, two layers of liquid crystal cell crossed orientation, but this mode needs to make two layers of liquid crystal cell, device
Thickness is thicker, is unfavorable for lightening.
Thus, current liquid crystal optical device correlative study still needs to be goed deep into.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose that one kind can modulate that natural light, thickness is thin or the simple liquid crystal lens of driving.
In one aspect of the invention, the present invention provides a kind of liquid crystal lens.According to an embodiment of the invention, the liquid crystal
Lens include oriented layer and the upper substrate, liquid crystal layer and the lower substrate that are stacked, wherein the oriented layer include upper oriented layer and
Lower oriented layer, the upper oriented layer are arranged between the upper substrate and the liquid crystal layer, and the lower oriented layer is arranged described
Between liquid crystal layer and the lower substrate, and the liquid crystal lens are divided into multiple orientation areas, in multiple orientation areas
The differently- oriented directivity of the oriented layer is different.It is orientated as a result, by region, it is only necessary to which modulation natural light can be realized in one layer of liquid crystal cell
Purpose, while the thinner thickness of liquid crystal lens meets lightening development trend.
According to an embodiment of the invention, multiple orientation areas are multiple bar shaped oriented regions arranged in the first direction
The optical path difference in domain, the two neighboring bar shaped orientation area differs half wavelength, so that multiple bar shaped orientation areas are constituted
Column Fresnel Lenses.
According to an embodiment of the invention, the differently- oriented directivity of the oriented layer in the two neighboring bar shaped orientation area is mutually hung down
Directly.
According to an embodiment of the invention, multiple orientation areas are multiple concentric circles annular orientation areas, it is two neighboring
The optical path difference of the concentric loop orientation area differs half wavelength, so that multiple concentric circles annular orientation areas constitute circle
Shape Fresnel Lenses.
According to an embodiment of the invention, oriented layer in one in the two neighboring concentric circles annular orientation area
Differently- oriented directivity is the radial direction of the concentric circles annular orientation area, in the two neighboring concentric circles annular orientation area
The differently- oriented directivity of oriented layer in another is the tangential direction of the concentric circles annular orientation area.
According to an embodiment of the invention, the thickness h of liquid crystal layer meets λ/2 △ nh=, wherein △ n=ne-no, ne are liquid
Brilliant molecule is perpendicular to the refractive index of long axis direction, and no is liquid crystal molecules parallel in the refractive index of long axis direction, and λ is predetermined wavelength.
According to an embodiment of the invention, the material of the upper oriented layer and the lower oriented layer is light orientation material.
According to an embodiment of the invention, the light orientation material is erasable light orientation material.
According to an embodiment of the invention, the light orientation material includes azobenzene material.
According to an embodiment of the invention, the liquid crystal lens further include top electrode and lower electrode, the top electrode is arranged in institute
It states between upper substrate and the upper oriented layer, the lower electrode is arranged between the lower substrate and the lower oriented layer.
According to an embodiment of the invention, the liquid crystal lens further include compensation film, the compensation film is arranged in the upper substrate
Between the upper electrode layer, for compensating optical dispersion.
In another aspect of this invention, the present invention provides a kind of methods for making mentioned-above liquid crystal lens.According to
The embodiment of the present invention takes this method comprises: being formed on a surface of a upper and lower substrate in surface of upper substrate respectively
To material layer；Subregion orientation process is carried out to the oriented material layer, forms oriented layer；It will be provided with described in the oriented layer
It carries out obtaining the liquid crystal lens to box processing on upper substrate and the lower substrate.The preparation method is simple, conveniently, be easy to work
Industry metaplasia produces, and obtained liquid crystal lens only have one layer of liquid crystal cell can modulate natural light, and thinner thickness, meets lightening
Development trend.
According to an embodiment of the invention, the subregion orientation process is by any one step in following (1)~(3)
Carry out: (1) material of the oriented layer is light orientation material, and the subregion orientation process includes: the part oriented region
The oriented material layer in domain carries out the first light orientation processing, the oriented material in the orientation area described in another part
Layer carries out the second light orientation processing, wherein the differently- oriented directivity of first light orientation processing and second light orientation processing is not
Together；(2) material of the oriented layer is erasable light orientation material, and the subregion orientation process includes: the orientation described in flood
Material layer carries out third light orientation processing, to taking described in the part orientation area Jing Guo the third light orientation processing
The 4th light orientation processing is carried out to material layer, wherein the orientation of the third light orientation processing and the 4th light orientation processing
Direction is different；(3) material of the oriented layer is light orientation material, and the subregion orientation process includes: by dot matrix exposure pair
The oriented material layer carries out the 5th light orientation processing.
According to an embodiment of the invention, before forming the oriented layer, further includes: in the one of the upper substrate
Upper electrode layer is formed on surface；And lower electrode layer is formed on one surface of the lower substrate.
In still another aspect of the invention, the present invention provides a kind of optical devices.According to an embodiment of the invention, the optics
Device includes mentioned-above liquid crystal lens.By using mentioned-above liquid crystal lens, can while modulating natural light,
With relatively thin thickness, meet lightening development trend.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the liquid crystal lens of one embodiment of the invention.
Fig. 2 is the planar structure schematic diagram of the liquid crystal layer of one embodiment of the invention.
Fig. 3 is the planar structure schematic diagram of the liquid crystal layer of another embodiment of the present invention.
Fig. 4 is the planar structure schematic diagram of the liquid crystal layer of another embodiment of the present invention.
Fig. 5 A is the structural schematic diagram of circular Fresnel lens, wherein upper figure is planar structure schematic diagram, and the following figure is section
Structural schematic diagram.
Fig. 5 B is the concentrating light principles schematic diagram of circular Fresnel lens.
Fig. 6 is the structural schematic diagram of column Fresnel Lenses, wherein upper figure is planar structure schematic diagram, and the following figure is section
Structural schematic diagram.
Fig. 7 is the schematic diagram of the section structure of the liquid crystal lens of one embodiment of the invention.
Fig. 8 is the schematic diagram of the section structure of the liquid crystal lens of another embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail.The embodiments described below is exemplary, and is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to text in the art
It offers described technology or conditions or is carried out according to product description.
The present invention provides a kind of liquid crystal lens.According to an embodiment of the invention, referring to Fig.1, which includes taking
To layer and the upper substrate 10, liquid crystal layer 40 and the lower substrate 70 that are stacked, wherein the oriented layer includes upper oriented layer 30 under
Oriented layer 50, the upper oriented layer 30 are arranged between the upper substrate 10 and the liquid crystal layer 40, and the lower oriented layer 50 is set
It sets between the liquid crystal layer 40 and the lower substrate 70, and the liquid crystal lens are divided into multiple orientation areas 42, Duo Gesuo
The differently- oriented directivity for stating the liquid crystal molecule in orientation area 42 is different.It is orientated as a result, by subregion, it is only necessary to one layer of liquid crystal cell
It realizes the purpose of modulation natural light, while the thinner thickness of liquid crystal lens, meets lightening development trend.
According to an embodiment of the invention, the specific material of upper substrate, lower substrate is not particularly limited, for example including but it is unlimited
In glass substrate, polymeric substrates etc., specific thickness, shape, size etc. can also use ring according to liquid crystal lens
Border and requirement are selected, and are no longer excessively repeated herein.
According to an embodiment of the invention, the concrete shape of multiple orientation areas 42, can flexible choice according to actual needs,
In some specific embodiments, the shape of multiple orientation areas 42 includes strip (referring to Fig. 2), the annular (reference of concentric circles
Fig. 3), at least one of round (referring to Fig. 4), regular polygon or irregular polygon.Thus, it is possible to realize different saturating
Mirror effect, to meet the requirement of different condition, the scope of application is more extensive.
According to an embodiment of the invention, multiple oriented regions 42 are multiple concentric circles annular orientation areas referring to Fig. 3,
The optical path difference of the two neighboring concentric loop orientation area differs half wavelength, so that multiple concentric circles annular oriented regions
Domain constitutes circular Fresnel lens (or annular Fresnel Lenses).Fresnel Lenses may be implemented in the liquid crystal lens as a result,
Effect can play good light-gathering and imaging performance, while liquid crystal lens being enabled to have lesser thickness, meet light
The requirement of thinning.
Those skilled in the art are known, and (structural schematic diagram is referring to Fig. 5 A, the principle of optically focused for conventional circular Fresnel lens
Schematic diagram is referring to Fig. 5 B) it is mostly the thin slice as made of polyolefine material injection pressure, also there is glass to make, lens surface is light on one side
Face, for the ascending concentric circles of another side imprinting to form multiple concentric loops (i.e. Fresnel-zone), its texture is basis
The interference of light and disturbing is penetrated and relative sensitivity and receiving angle requirement design, specifically, referring to Fig. 5 A, it is two neighboring same
The optical path difference of heart annulus differs half wavelength, in other words by multiple concentric loops number consecutively 1,2,3 ... from inside to outside, odd number
Ring differs the integral multiple of half wavelength with the optical path difference of even loop, is as a result, relevant, Xiang Changguang by the light of Fresnel Lenses,
Realize good optically focused and imaging effect.In the embodiment of the present invention, by being orientated to liquid crystal layer subregion, so that multiple oriented regions
Domain is distributed according to the concentric loop of above-mentioned Fresnel Lenses, and makes the light path of the two neighboring concentric loop orientation area
Difference difference half wavelength, i.e., by multiple concentric loop orientation areas number consecutively 1,2,3 ... from inside to outside, and odd loop and idol
The optical path difference of ring of numbers differs half wavelength, to constitute circular Fresnel lens, the thickness of liquid crystal layer, the size of concentric loop, liquid
Brilliant refractive index etc. can be selected according to the requirement of circular Fresnel lens.
Some specific embodiments according to the present invention can determine the liquid crystal lens structure referring to Fig. 5 A by following steps
Parameter when at circular Fresnel lens: according to previously selected predetermined wavelength lambda and liquid-crystal refractive-index, (ne: liquid crystal molecule is vertical
In the refractive index of long axis direction, no: liquid crystal molecules parallel is in the refractive index of long axis direction) determine liquid crystal layer in liquid crystal lens
Thickness h (or thick for liquid crystal cell), and then determine liquid crystal dosage, then according to above-mentioned predetermined wavelength lambda, the focal length f of liquid crystal lens
Calculate concentric radius of circle rj(j indicates the number of above-mentioned concentric loop, j=1,2,3 ...), and then determine each ring width dj, specifically
, in order to further increase the service performance of liquid crystal lens, while lesser thickness is made it have, the thickness of liquid crystal layer can be made
Degree h meets λ/2 △ nh=, wherein △ n=ne-no, and according to the optical principle of lens,dj=rj-rj-1, it is based on
Above-mentioned formula can determine the relevant parameter of liquid crystal lens.
According to an embodiment of the invention, in order to enable the circular Fresnel lens that liquid crystal lens are constituted have better diffraction
Efficiency, smaller optically focused hot spot, bigger brightness etc. can make one in the two neighboring concentric circles annular orientation area
The differently- oriented directivity of oriented layer in a is the radial direction of the concentric circles annular orientation area, the two neighboring concentric loop
The differently- oriented directivity of oriented layer in another in shape orientation area is the tangential direction of the concentric circles annular orientation area.By
This, sectional view is all the same at any angle, can play identical optical effect, and use is simpler, conveniently, the scope of application
More extensively.
According to an embodiment of the invention, multiple oriented regions 42 are multiple bar shapeds arranged in the first direction referring to Fig. 2
The optical path difference of orientation area, the two neighboring bar shaped orientation area differs half wavelength, so that multiple bar shaped oriented regions
Domain constitutes column Fresnel Lenses.Specifically, the structural schematic diagram of conventional column Fresnel Lenses is referring to Fig. 6, it is above-mentioned
It is had made some improvements on typical round Fresnel Lenses, Circular Fringe is adjusted to transversely arranged, is no longer concentric arrays, it is horizontal
Specific numbering to striped is identical as circular Fresnel lens, is taken in the present invention by the way that liquid crystal layer is divided into multiple bar shapeds
To region, multiple bar shaped orientation areas is made to meet the optical path difference of the two neighboring bar shaped orientation area of column Fresnel Lenses
The optical path difference requirement of half wavelength is differed, to realize optically focused and imaging of Fresnel Lenses and other effects, wherein the thickness of liquid crystal layer
Degree, the size of concentric loop, the refractive index of liquid crystal etc. can be selected according to the requirement of column Fresnel Lenses.
Some specific embodiments according to the present invention can determine that the liquid crystal lens are constituted referring to Fig. 6 by following steps
Parameter when column Fresnel Lenses: according to previously selected predetermined wavelength lambda and liquid-crystal refractive-index (ne: liquid crystal molecule perpendicular to
The refractive index of long axis direction, no: liquid crystal molecules parallel is in the refractive index of long axis direction) determine the thickness of liquid crystal layer in liquid crystal lens
H (or thick for liquid crystal cell) is spent, and then determines liquid crystal dosage, then according to previously selected predetermined wavelength, the coke of liquid crystal lens
It calculates away from f from the center line of center striped to the outer peripheral distance r of predetermined stripedj(j indicates the number of above-mentioned striped, j=1,
2,3 ...), and then determine each width of fringe, and then determine each ring width dj, specifically, in order to further increase liquid crystal lens
Service performance, while lesser thickness is made it have, the thickness h of liquid crystal layer can be made to meet λ/2 △ nh=, wherein △ n=
Ne-no, and according to the optical principle of lens,dj=rj-rj-1, it is based on above-mentioned formula, can determine liquid crystal lens
Relevant parameter.
According to an embodiment of the invention, in order to enable the column Fresnel Lenses that liquid crystal lens are constituted has better diffraction
Efficiency, smaller optically focused hot spot, bigger brightness etc., the differently- oriented directivity of the oriented layer in the two neighboring bar shaped orientation area
It is perpendicular.Diffraction efficiency as a result, by the light of Fresnel Lenses is more preferable, and the hot spot after convergence is smaller, and brightness is higher, can
Realize better optical effect.
According to an embodiment of the invention, the material of the upper oriented layer and the lower oriented layer is light orientation material.As a result,
What be can be convenient carries out and different light irradiates by different orientation areas to oriented layer progress subregion orientation, operation letter
It is single, it is convenient.
According to an embodiment of the invention, the light orientation material is erasable light orientation material.Specifically, erasable light takes
It is arranged after an illumination to material, corresponding structure change (such as light isomery, photo-crosslinking or light can occur for light orientation material
Degradation etc.) so that liquid crystal molecule is orientated according to predetermined direction, and to the light orientation material Jing Guo light orientation processing again into
The different illumination (such as polarization direction, power and first time illumination difference) of row, light orientation material can be according to second of illumination again
It is secondary to carry out corresponding structure change, so that the differently- oriented directivity of liquid crystal molecule changes.Subregion is carried out to oriented layer as a result,
When orientation process, simpler convenience, it is possible to reduce the number of mask plate, use manpower and material resources sparingly, reduce cost etc..
According to an embodiment of the invention, the light orientation material that can be used includes azobenzene material, it is specific as having meat
The macromolecule polymer material etc. of the photosensitive groups such as cinnamic acid, cumarin.Speed of orientation is fast as a result, the degree of orientation is high, and is orientated and stablizes
Property it is good, while material source extensively, be easy to get, it is cheap.
According to an embodiment of the invention, the liquid crystal lens can also include top electrode 20 and lower electrode 60, institute referring to Fig. 7
It states top electrode 20 to be arranged between the upper substrate 10 and the upper oriented layer 30, the lower electrode 60 is arranged in the lower substrate
Between 70 and the lower oriented layer 50.By being powered to upper and lower electrode layer, and adjust the adjustable liquid crystal molecule of voltage swing
Deflect direction, and then more flexible and be conveniently adjusted liquid crystal lens and realize different optical effects.In some tools of the invention
It, can due to being orientated by subregion so that liquid crystal lens divide the orientation area different for multiple differently-s oriented directivity in body embodiment
Upper electrode layer and lower electrode layer are disposed as transparent side electrode, as a result, by being powered to upper and lower electrode layer, can make
Liquid crystal molecule deflection direction in flood liquid crystal layer is consistent, so that liquid crystal lens are equivalent to the effect of transparent glass, and it is upper and lower electric
After the layer power-off of pole, liquid crystal molecule then restores the state of subregion orientation automatically, plays the effect of lens.Driving is simple as a result, is not required to
The electrode of labyrinth is wanted, preparation section is simple, more convenient and time saving.
According to an embodiment of the invention, the material for forming upper electrode layer and lower electrode layer can be with the object of any electrically conducting transparent
Matter, for example including but be not limited to transparent conductive oxide, specific such as tin indium oxide, indium zinc oxide.As a result, with higher
Light transmittance while, have preferable electric conductivity.
According to an embodiment of the invention, reduce deviation to further increase the using effect of liquid crystal lens, referring to Fig. 8,
The liquid crystal lens can also include compensation film 80, the compensation film 80 setting the upper substrate 10 and the upper electrode layer 20 it
Between, for compensating optical dispersion.Specifically, when the design parameter setting of liquid crystal lens, usually with reference to some predetermined wavelength
Light is configured, and is illustrated for the Fresnel Lenses being previously mentioned, and Fresnel Lenses requires two neighboring orientation area
Between optical path difference be half wavelength, wavelength herein can select some predetermined wavelength according to actual needs, because of human eye pair
Green light is most sensitive, and green light is in the middle position of visible light wave range, will not produce to long wavelength and the movement of shortwave length direction
Raw excessive deviation, therefore the predetermined wavelength is ordinarily selected to the wavelength (such as 550nm or 589nm) of green light in practical operation,
And at this point for that can have certain deviation for feux rouges or blue light, in order to compensate for deviation bring adverse effect, Ke Yishe
Set different wave length, the compensation film of different refractivity compensates above-mentioned deviation (or optical dispersion), and then can be improved
The optical property of liquid crystal lens.
In another aspect of this invention, the present invention provides a kind of methods for making mentioned-above liquid crystal lens.According to
The embodiment of the present invention takes this method comprises: being formed on a surface of a upper and lower substrate in surface of upper substrate respectively
To material layer；Subregion orientation process is carried out to the oriented material layer, forms oriented layer；It will be provided with described in the oriented layer
It carries out obtaining the liquid crystal lens to box processing on upper substrate and the lower substrate.The preparation method is simple, conveniently, be easy to work
Industry metaplasia produces, and obtained liquid crystal lens only have one layer of liquid crystal cell, can be realized the effect for adjusting natural light, at the same thickness compared with
It is thin, meet lightening development trend.
It is taken according to an embodiment of the invention, being formed on a surface of a upper and lower substrate in surface of upper substrate respectively
It is specifically as follows to material layer and forms upper oriented material layer on a surface of upper substrate, and on a surface of lower substrate
Lower oriented material layer is formed, upper oriented material layer and lower oriented material layer collectively form oriented material layer, and in upper substrate under
On substrate formed oriented material layer specific method can be this field conventional method, such as can by coating, spraying, beat
The modes such as print form oriented material layer etc..According to an embodiment of the invention, the material of oriented layer is light orientation material, subregion orientation
Processing be carried out by light orientation processing, specifically, light orientation processing refer to it is different by using polarization direction, power etc.
Light (such as linear polarization ultraviolet light, linearly polarized laser) is irradiated oriented layer (such as can be simultaneously to upper substrate and lower substrate
On oriented material layer carry out light irradiation, can also independently on the upper oriented material layer and lower substrate on upper substrate
Lower oriented material layer carries out light irradiation) so that the knot such as light isomery, photo-crosslinking, light degradation occurs for the light orientation material in oriented layer
Structure variation, generates surface anisotropy, so that on the surface of oriented layer orientations occur for liquid crystal molecule.
Some specific embodiments according to the present invention, the subregion orientation process include: in the orientation area of part
Oriented material layer carry out the first light orientation processing；The orientation area described in another part (refers to except above-mentioned partially oriented region
Except other whole orientation areas) in oriented material layer carry out the second light orientation processing；Wherein, at first light orientation
It manages different with the differently- oriented directivity of second light orientation processing.Specifically, in the step, it can be first in upper substrate or lower substrate
It is upper to form patterned mask plate (such as photoresist, masking ink layer), it needs at the orientation area of orientation process not by exposure mask
Version cover, without carry out orientation process orientation area covered by mask plate, then in mask plate far from liquid crystal layer one
Side carries out illumination to liquid crystal cell, so that generating by the light orientation material in the upper oriented material layer and lower oriented material layer of illumination
Surface anisotropy can be repeated as many times aforesaid operations in the step, to multiple and different so that liquid crystal molecular orientation arranges
Region be orientated, obtain the different multiple orientation areas of differently- oriented directivity.
Other specific embodiments according to the present invention, the material of the oriented layer are erasable light orientation material, then institute
Stating subregion orientation process may include: that the oriented material layer described in flood carries out third light orientation processing；To by the third
The oriented material layer in the orientation area of the part of light orientation processing carries out the 4th light orientation processing；Wherein, described
Three light orientation processings are different with the differently- oriented directivity of the 4th light orientation processing.It is not needed as a result, in third light orientation processing
Mask plate enormously simplifies operating procedure, reduces technology difficulty, and save cost.
Other specific embodiment according to the present invention can be to institute in order to realize more complicated liquid crystal lens structure
It states oriented material layer and carries out dot matrix exposure to carry out light orientation processing.Specifically, the principle of dot matrix exposure light orientation processing is with before
The light orientation principle of face description is consistent, and difference is that the light source for exposure includes multiple independent radiation sources, each irradiation
Light source can it is independent adjust irradiation light design parameter (such as polarization direction, power), thus, it is possible to by liquid crystal lens draw
Divide multiple orientation areas, then different orientation areas is irradiated respectively with multiple independent radiation sources simultaneously, to realize difference
The different effect of orientation area differently- oriented directivity.It is easy to operate as a result, quick, simple and direct, be particularly suitable for preparation orientation area quantity compared with
It is more, the more liquid crystal lens of differently- oriented directivity, so as to realize that structure is more complicated, the more comprehensive liquid crystal lens of function.
According to an embodiment of the invention, this method further includes the institute in the upper substrate before forming oriented material layer
It states and forms upper electrode layer on a surface；And lower electrode layer is formed on one surface of the lower substrate.Specifically,
The specific method that upper electrode layer is arranged on upper substrate is not particularly limited, and can be any of method.Some specific implementations
In example, upper electrode layer can be formed on upper substrate by modes such as deposition, plated films, it will be understood by those skilled in the art that
The concrete mode that lower electrode layer is formed on lower substrate is identical with upper substrate, and this is no longer going to repeat them.
According to an embodiment of the invention, above-mentioned refer to liquid crystal be perfused between upper oriented layer and lower oriented layer to box processing,
And the step of upper substrate and lower substrate are packaged together, the specific liquid crystal and the method for encapsulation of being perfused can be the normal of this field
Rule method.In some specific embodiments, packaging plastic can be formed on upper substrate or lower substrate, and (such as photocuring, heat cure are encapsulated
Glue etc.), and liquid crystal is added dropwise on it, then upper substrate and lower substrate are packaged together by packaging plastic, form liquid crystal cell.
In still another aspect of the invention, the present invention provides a kind of optical devices.According to an embodiment of the invention, the optics
Device includes mentioned-above liquid crystal lens.The optical device includes all feature and advantage of mentioned-above liquid crystal lens,
This is no longer going to repeat them.
According to an embodiment of the invention, the specific type of the optical device is not particularly limited, can make for any need
With the optical device of lens, for example including but be not limited to optical system, image device, intelligent lighting device, automobile lamp etc..
Certainly, for those skilled in the art it is also to be understood that other than mentioned-above liquid crystal lens, which further includes routine
Structure and component essential to optical device, no longer excessively repeat herein.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (15)
1. a kind of liquid crystal lens, which is characterized in that including oriented layer and the upper substrate, liquid crystal layer and the lower substrate that are stacked,
In,
The oriented layer includes upper oriented layer and lower oriented layer, and the upper oriented layer is arranged in the upper substrate and the liquid crystal layer
Between, the lower oriented layer is arranged between the liquid crystal layer and the lower substrate, and the liquid crystal lens are divided into multiple take
To region, the differently- oriented directivity of the oriented layer in multiple orientation areas is different.
2. liquid crystal lens according to claim 1, which is characterized in that multiple orientation areas are multiple along first direction
The optical path difference of the bar shaped orientation area of arrangement, the two neighboring bar shaped orientation area differs half wavelength, so that multiple described
Bar shaped orientation area constitutes column Fresnel Lenses.
3. liquid crystal lens according to claim 2, which is characterized in that described in the two neighboring bar shaped orientation area
The differently- oriented directivity of oriented layer is perpendicular.
4. liquid crystal lens according to claim 1, which is characterized in that multiple orientation areas are multiple concentric circles annulars
The optical path difference of orientation area, the two neighboring concentric loop orientation area differs half wavelength, so that multiple concentric circles
Annular orientation area constitutes circular Fresnel lens.
5. liquid crystal lens according to claim 4, which is characterized in that in the two neighboring concentric circles annular orientation area
One in the oriented layer differently- oriented directivity be the concentric circles annular orientation area radial direction, it is two neighboring described
The differently- oriented directivity of the oriented layer in another in concentric circles annular orientation area is the concentric circles annular orientation area
Tangential direction.
6. liquid crystal lens according to claim 1, which is characterized in that the thickness h of the liquid crystal layer meets λ/2 △ nh=,
Wherein, △ n=ne-no, ne are refractive index of the liquid crystal molecule perpendicular to long axis direction, and no is liquid crystal molecules parallel in long axis direction
Refractive index, λ is predetermined wavelength.
7. liquid crystal lens according to claim 1, which is characterized in that the material of the upper oriented layer and the lower oriented layer
For light orientation material.
8. liquid crystal lens according to claim 7, which is characterized in that the light orientation material is erasable light orientation material
Material.
9. liquid crystal lens according to claim 8, which is characterized in that the light orientation material includes azobenzene material.
10. liquid crystal lens according to claim 1, which is characterized in that further include top electrode and lower electrode, the top electrode
Be arranged between the upper substrate and the upper oriented layer, the lower electrode setting the lower substrate and the lower oriented layer it
Between.
11. liquid crystal lens according to claim 1, which is characterized in that further include compensation film, the compensation film is arranged in institute
It states between upper substrate and the upper electrode layer, for compensating optical dispersion.
12. a kind of method for making liquid crystal lens of any of claims 1-11 characterized by comprising
Oriented material layer is formed on a surface of a upper and lower substrate in surface of upper substrate respectively；
Subregion orientation process is carried out to the oriented material layer, forms oriented layer；
It will be provided on the upper substrate and the lower substrate of the oriented layer and carry out that it is saturating to obtain the liquid crystal to box processing
Mirror.
13. according to the method for claim 12, which is characterized in that the subregion orientation process is by following (1)~(3)
In any one step carry out:
(1) material of the oriented layer is light orientation material, and the subregion orientation process includes:
First light orientation processing is carried out the oriented material layer in the orientation area of part,
The oriented material layer in the orientation area described in another part carries out the second light orientation processing,
Wherein, first light orientation processing is different with the differently- oriented directivity of second light orientation processing；
(2) material of the oriented layer is erasable light orientation material, and the subregion orientation process includes:
The oriented material layer described in flood carries out third light orientation processing,
The 4th light is carried out to the oriented material layer in the part orientation area Jing Guo the third light orientation processing to take
To processing,
Wherein, the third light orientation processing is different with the differently- oriented directivity of the 4th light orientation processing；
(3) material of the oriented layer is light orientation material, and the subregion orientation process includes:
The 5th light orientation processing is carried out to the oriented material layer by dot matrix exposure.
14. according to the method for claim 12, which is characterized in that before forming the oriented layer, further includes:
Upper electrode layer is formed on one surface of the upper substrate；And
Lower electrode layer is formed on one surface of the lower substrate.
15. a kind of optical device, which is characterized in that including the described in any item liquid crystal lens of claim 1-11.
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| CN112510134A (en) * | 2020-11-30 | 2021-03-16 | 中南大学 | LED indirectly modulating light polarization mode |
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