CN103792754B - The liquid crystal lens array of lenses pixel is formed based on ultraviolet light scanning photoconductive material - Google Patents
The liquid crystal lens array of lenses pixel is formed based on ultraviolet light scanning photoconductive material Download PDFInfo
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- CN103792754B CN103792754B CN201310113813.7A CN201310113813A CN103792754B CN 103792754 B CN103792754 B CN 103792754B CN 201310113813 A CN201310113813 A CN 201310113813A CN 103792754 B CN103792754 B CN 103792754B
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Abstract
The present invention relates to a kind of liquid crystal lens and array, particularly relate to a kind of adjustable focus liquid crystal lens based on photoconductive material and the technical field of array.It is sequentially arranged rear substrate glasses, common electrode layer, rear oriented layer, front oriented layer, photoconductive material layer, the pixel electrode layer of transparent conductive film composition, front substrate glasses from top to bottom, arrange laying between rear oriented layer, front oriented layer, in laying, pour into nematic liquid crystal.1, the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material of the present invention, electro-optic material layer is utilized to regulate Electric Field Distribution, control photoelectric material sheaf space resistance be distributed by controlling incident uv light intensity and time, preferable Electric Field Distribution curve can be obtained.Can select suitable photoelectric material and liquid crystal material parameters, adjustable focal length scope is big.Can select nematic liquid crystal or blue phase liquid crystal, use blue phase liquid crystal to have the response time fast and polarize unrelated characteristic.Its manufacture craft is compatible with existing microelectronic processing technology.
Description
Technical field
The present invention relates to a kind of liquid crystal lens and array, particularly relate to a kind of adjustable focus liquid crystal lens based on photoconductive material and the technical field of array.
Background technology
The advantages such as it is little that liquid crystal lens array device has volume, lightweight, and power consumption is little, its feature realizing adjustable focal length without mechanical part shows exclusive advantage.Show at optical communication device, fiber switch, optical deflection device, 3D through development in recent years, LC variable focus lens and array, the various fields such as integrated image system and image procossing have great potential using value.
The basic mechanism that adjustable focal length liquid crystal lens is formed at present is to produce in the middle of modulation lens and the optical path difference at edge, forms the profile of graded index change, to realize the change of Electric Field Modulated focal length in liquid crystal lens.The change realizing graded index is the most uniformly classified by thickness of liquid crystal layer, mainly has two kinds, i.e. uniform liquid crystal layer thickness structure and non-homogeneous thickness of liquid crystal layer structure.
Uniform liquid crystal layer thickness structure, uses at the liquid crystal display that is made up of upper and lower two pieces of glass substrates and parallel-oriented constitutes parallel evenly distributed liquid crystal.Prebasal plate, from glass substrate, is public relations electrode layer, oriented layer respectively；Metacoxal plate, from glass substrate, is circle hole shape electrode layer, oriented layer successively.The thickness of liquid crystal display is determined by the liner being dispersed in glass substrate inner surface, liquid crystal display internal perfusion nematic liquid crystal.The operation principle of circular hole electrode structure LC variable focus lens is applying operating voltage in circular hole row electrode layer, inhomogeneous field distribution is produced at liquid crystal region, liquid crystal molecule is under non-uniform electric field effect, there is non-homogeneous deflection, the distribution of its refractive index spatial is caused non-uniform change also to occur, so that light beam focuses on ad-hoc location.When regulating and controlling voltage and changing, lenticule focal position changes, thus completes the regulation process of lenticule focal position.
Non-homogeneous thickness of liquid crystal layer structure, the liquid crystal in regulation and control region is concave surface or convex-surface type structure, polymer use the method such as photoetching or mold pressing to control, and upper lower glass substrate electrode layer is plane or in curved surface with polymer three-dimensional structure.Utilize the refringence of polymeric material and liquid crystal material, form a microlens structure, make light beam focus on ad-hoc location.When applying voltage, liquid-crystal refractive-index changes with voltage, thus realizes lenticular focus controlling.
Along with the development of the technology such as Three-dimensional Display and optic communication, require liquid crystal lens focal-distance tuning range to improve further.
Summary of the invention
It is an object of the present invention to provide one can Control of Voltage liquid crystal lens focal length variations, focusing range is big, and the liquid crystal lens array that based on ultraviolet light scanning photoconductive material form lenses pixel compatible with liquid crystal display manufacturing process.
A kind of liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material, its structure mainly has front substrate glasses, thickness is 0.4-1.1mm, the pixel electrode that transparent conductive film is constituted, the covering photoconductive material layer on the pixel electrode that the method such as spin coating, printing of employing obtains, photoconductive material tunic thickness is 10nm-10mm, covers the front oriented layer on photoconductive material layer, and thickness is 100nm-5um.Also including rear substrate glasses, thickness is 0.4-1.1mm, the public electrode that transparent conductive film is constituted, and covers the rear oriented layer on public electrode, and thickness is 100nm-5um.Front and back's substrate glasses is carried out respectively friction orientation, makes front-back baseboard frictional direction parallel or antiparallel.Using certain thickness laying that front substrate glasses and rear substrate glasses are sealed into certain thickness liquid crystal display, the thickness of laying is 2um-500um, pours into nematic liquid crystal.
A kind of liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material, its structure mainly has front substrate glasses, thickness is 0.4-1.1mm, the pixel electrode that transparent conductive film is constituted, the covering photoconductive material layer on the pixel electrode that the method such as spin coating, printing of employing obtains, photoconductive material tunic thickness is 10nm-10mm.Also including rear substrate glasses, thickness is 0.4-1.1mm, the public electrode that transparent conductive film is constituted.Using certain thickness laying that front substrate glasses and rear substrate glasses are sealed into certain thickness liquid crystal display, the thickness of laying is 2um-500um, pours into blue phase liquid crystal.
The photoconductive material of the present invention such as polyvinylcarbazole insulate in the case of unglazed photograph, has electric conductivity after ultraviolet light irradiates, and resistance size can be controlled by ultraviolet light light intensity and irradiation time.
The present invention controls zones of different ultraviolet light exposure intensity by the method utilizing programming Control ultraviolet light irradiation area, light intensity and irradiation time, it is achieved the spatial distribution of photoconductive material resistance size controls, and forms lenses pixel.
The method that the present invention controls irradiating ultraviolet light by design realizes the control of the spatial distribution to photoconductive material resistance size, and controlling pattern of pixels can be strip, rectangle, regular polygon or circular hole simultaneously, width or a diameter of 5 μm-10mm.
The space periodicity ultraviolet light light distribution of the present invention can be successively decreased or incremental to center by pattern of pixels edge.
The operation principle of the liquid crystal lens array of lenses pixel is formed based on ultraviolet light scanning photoconductive material, by programming Control ultraviolet light irradiation area, intensity and time, obtain space periodicity ultraviolet light light distribution, thus control the resistance spatial distribution of electro-optic material layer.When irradiating ultraviolet light light intensity is successively decreased to pixel center by pixel edge, pixel edge accepts ultraviolet light and is more than pixel center, and photoelectric material resistance is incremented by pixel center by pixel edge.Applying ac square-wave voltage between pixel electrode and public electrode, due to the effect of photoelectric material, the magnitude of voltage being applied on liquid crystal is successively decreased to pixel center by pixel edge, in convex lens.When irradiating ultraviolet light light intensity is incremented by pixel center by pixel edge, photoelectric material resistance is successively decreased to pixel center by pixel edge.Applying ac square-wave voltage between pixel electrode and public electrode, due to the effect of photoelectric material, the magnitude of voltage being applied on liquid crystal is incremented by pixel center by pixel edge, in concavees lens.
Reasonable, the electro-optic material layer resistance spatial distribution of the present invention is obtained by controlling periodically ultraviolet light light intensity and time.
Reasonable, electro-optic material layer resistance spatial distribution, focal length of lens size and the lens scope of the present invention are together decided on by photoelectric material characteristic, ultraviolet light light intensity, ultraviolet light irradiation area and ultraviolet light irradiation time.
Reasonable, the present invention can be irradiated the pattern of light distribution and control lens shape by controlling ultraviolet light.
Reasonable be the electro-optic material layer of the present invention by spin coating, the method such as printing obtains.
Reasonable, the liquid crystal lens aperture of the present invention is irradiated light distribution pattern of pixels by ultraviolet light and is determined, can be strip, rectangle, regular polygon or circular hole, width or a diameter of 5 μm-10mm.
Reasonable, the space periodicity ultraviolet light light distribution pattern of pixels of the present invention to center can be incremented by from edge with transmitance or successively decrease.
Reasonable, the thickness of the electro-optic material layer of the present invention is 10nm-10mm, and after ultraviolet light irradiates, resistance is 10 Ω-100M Ω.
The present invention uses technique scheme compared with prior art, has a following beneficial effect:
1, the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material of the present invention, electro-optic material layer is utilized to regulate Electric Field Distribution, control photoelectric material sheaf space resistance be distributed by controlling incident uv light intensity and time, preferable Electric Field Distribution curve can be obtained.
2, the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material of the present invention, can select suitable photoelectric material and liquid crystal material parameters, and adjustable focal length scope is big.
3, the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material of the present invention, can select nematic liquid crystal or blue phase liquid crystal, uses blue phase liquid crystal to have the response time fast and polarize unrelated characteristic.
4, the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material of the present invention, its manufacture craft is compatible with existing microelectronic processing technology.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the another kind of structural representation of the present invention.
Fig. 3 is the design diagram of present invention pixel pattern.
In figure: 1, front substrate glasses；2, pixel electrode；3, photoconductive material layer；4, front oriented layer；5, rear substrate glasses；6, public electrode；7, rear oriented layer；8, laying；9, nematic liquid crystal；10, blue phase liquid crystal；11, pattern of pixels.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in detail:
Embodiment one, nematic liquid crystal lens arra based on ultraviolet light scanning photoconductive material formation lenses pixel:
As shown in Figure 1, a kind of nematic liquid crystal lens arra forming lenses pixel based on ultraviolet light scanning photoconductive material, its structure mainly has front substrate glasses 1, the pixel electrode 2 that transparent conductive film is constituted, covering photoconductive material layer 3 on pixel electrode 2 that the method such as spin coating, printing of employing obtains, covers the front oriented layer 4 on photoconductive material layer 3.Also include rear substrate glasses 5, the public electrode 6 that transparent conductive film is constituted, cover the rear oriented layer 7 on public electrode 6.Front and back's substrate glasses is carried out respectively friction orientation, makes front-back baseboard frictional direction parallel or antiparallel.Use certain thickness laying 8 that front substrate glasses and rear substrate glasses are sealed into certain thickness liquid crystal display, pour into nematic liquid crystal 9.
The operation principle being somebody's turn to do nematic liquid crystal lens arra based on ultraviolet light scanning photoconductive material formation lenses pixel is as follows: apply ac square-wave voltage between public electrode 6 and pixel electrode 2.By programming Control ultraviolet light irradiation area, intensity and time, obtain space periodicity ultraviolet light light distribution, thus control the resistance spatial distribution of electro-optic material layer 3.When irradiating ultraviolet light light intensity is successively decreased to pixel center by pixel edge, pixel edge accepts ultraviolet light and is more than pixel center, and photoelectric material 3 resistance is incremented by pixel center by pixel edge.Being applied to voltage on nematic liquid crystal 9 successively decrease to lens centre from rims of the lens, nematic liquid crystal 9 molecule arranged in parallel, under electric field action, arranges along direction of an electric field, forms inclination angle theta (z).Owing to from rims of the lens to lens centre voltage grading, liquid crystal 9 molecule occurs non-homogeneous deflection, cause the distribution of its refractive index spatial that non-uniform change also occurs, produce different phase delay of δ, so that light beam focuses on ad-hoc location, in convex lens, as shown in Figure 2.When irradiating ultraviolet light light intensity is incremented by pixel center by pixel edge, pixel edge accepts ultraviolet light and is less than pixel center, and photoconductive material 3 resistance is successively decreased to pixel center by pixel edge.Being applied to voltage on nematic liquid crystal 9 be incremented by lens centre from rims of the lens, nematic liquid crystal 9 molecule arranged in parallel, under electric field action, arranges along direction of an electric field, forms inclination angle theta (z).Owing to being incremented by from rims of the lens to lens centre voltage, there is non-homogeneous deflection in liquid crystal 9 molecule, causes the distribution of its refractive index spatial that non-uniform change also occurs, produces different phase delay of δ, so that incident beam dissipates, in concavees lens, as shown in Figure 2.
Embodiment two, blue phase liquid crystal lens arra based on ultraviolet light scanning photoconductive material formation lenses pixel:
As shown in Figure 3, a kind of blue phase liquid crystal lens arra forming lenses pixel based on ultraviolet light scanning photoconductive material, its structure mainly has front substrate glasses 1, the pixel electrode 2 that transparent conductive film is constituted, covering photoconductive material layer 3 on pixel electrode 2 that the method such as spin coating, printing of employing obtains, rear substrate glasses 5, the public electrode 6 that transparent conductive film is constituted forms.Use certain thickness laying 8 that front substrate glasses and rear substrate glasses are sealed into certain thickness liquid crystal display, pour into blue phase liquid crystal 10.
The operation principle being somebody's turn to do blue phase liquid crystal lens arra based on ultraviolet light scanning photoconductive material formation lenses pixel is as follows: apply ac square-wave voltage between public electrode 6 and pixel electrode 2.When irradiating ultraviolet light light intensity is successively decreased to pixel center by pixel edge, pixel edge accepts ultraviolet light and is more than pixel center, and photoconductive material 3 resistance is incremented by pixel center by pixel edge.Due to Kerr effect, under electric field action, blue phase liquid crystal 10 produces electric field induced refractive index changes delta n, and therefore refractive index spatial distribution also produces non-homogeneous, so that light beam focuses on ad-hoc location, in convex lens.When irradiating ultraviolet light light intensity is incremented by pixel center by pixel edge, pixel edge accepts ultraviolet light and is less than pixel center, and photoconductive material 3 resistance is successively decreased to pixel center by pixel edge.Due to Kerr effect, under electric field action, blue phase liquid crystal 10 produces electric field induced refractive index changes delta n, and therefore refractive index spatial distribution also produces non-homogeneous, makes incident beam dissipate, in concavees lens.
In above-described embodiment one, embodiment two, can design gray scale mask plate pattern is strip, rectangle, regular polygon or circular hole, forms variously-shaped adjustable liquid crystal microlens array, as shown in Figure 3.The present embodiment only gives the example application that part is concrete, but for the patent personnel being engaged in flat-panel monitor, also can design various deformation product according to above enlightenment, and this is still considered to be covered by among the present invention.
Claims (9)
1. the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material, it is characterized in that being sequentially arranged rear substrate glasses (5), common electrode layer (6), rear oriented layer (7), front oriented layer (4), photoconductive material layer (3), the pixel electrode layer (2) of transparent conductive film composition, front substrate glasses (1) from top to bottom, arrange laying (8) between rear oriented layer (7), front oriented layer (4), in laying (8), pour into nematic liquid crystal (9) or blue phase liquid crystal (10)；By controlling ultraviolet light irradiation area, intensity and time, obtain space periodicity ultraviolet light light distribution, thus control the resistance spatial distribution of photoconductive material layer (3), thus form lenses pixel.
2. the liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material, it is characterized in that being sequentially arranged rear substrate glasses (5), common electrode layer (6), photoconductive material layer (3), the pixel electrode layer (2) of transparent conductive film composition, front substrate glasses (1) from top to bottom, common electrode layer (6), photoconductive material layer (3) arrange laying (8), pour into blue phase liquid crystal (10) in laying (8).
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1, it is characterised in that above-mentioned front oriented layer (4), the thickness of rear oriented layer (7) are 100nm-5um.
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1 and 2, it is characterised in that above-mentioned front substrate glasses (1), the thickness of rear substrate glasses (5) are 0.4-1.1mm.
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1 and 2, it is characterised in that the thickness of above-mentioned laying (8) is 2um-500um.
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1, its feature is by controlling ultraviolet light light intensity spatial distribution, the pattern of pixels (11) controlled on photoconductive material layer (3) is strip, rectangle, regular polygon or circular hole, width or a diameter of 5um-10mm.
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1 and 2, it is characterized in that controlling ultraviolet light irradiation area, intensity and time, make pattern of pixels (11) regulation photoconductive material resistance be incremented by center from edge or successively decrease, thus realize convex lens or concavees lens control.
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1 and 2, it is characterised in that above-mentioned photoconductive material layer (3) is obtained by spin coating, printing process.
The liquid crystal lens array forming lenses pixel based on ultraviolet light scanning photoconductive material the most according to claim 1 and 2, it is characterised in that the thickness of above-mentioned photoconductive material layer (3) is 10nm-10mm, and resistance is 10 Ω-100M Ω after ultraviolet light irradiates.
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| JP6488950B2 (en) * | 2015-08-28 | 2019-03-27 | 東芝ライテック株式会社 | LCD panel manufacturing equipment |
| CN109491168A (en) * | 2018-11-05 | 2019-03-19 | 厦门大学 | A kind of light-operated switching method of cholesteric liquid crystal fingerprint texture |
| CN110275363A (en) * | 2019-06-21 | 2019-09-24 | 大连海事大学 | A kind of low aberrations mode electrode liquid crystal lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367398A (en) * | 2001-08-14 | 2002-09-04 | 中国科学院长春光学精密机械与物理研究所 | Continuous vari-focus Fresnel lens |
| CN1721926A (en) * | 2004-06-11 | 2006-01-18 | 精工爱普生株式会社 | Electro-optical device, method of manufacturing the same, and electronic apparatus using electro-optical device |
| CN102067242A (en) * | 2008-06-21 | 2011-05-18 | 兰斯维克多公司 | Electro-optical devices using dynamic reconfiguration of effective electrode structures |
| CN102902129A (en) * | 2012-11-14 | 2013-01-30 | 中航华东光电有限公司 | Liquid crystal lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0651341A (en) * | 1992-07-31 | 1994-02-25 | Nippon Hoso Kyokai <Nhk> | Spatial optical modulation element |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367398A (en) * | 2001-08-14 | 2002-09-04 | 中国科学院长春光学精密机械与物理研究所 | Continuous vari-focus Fresnel lens |
| CN1721926A (en) * | 2004-06-11 | 2006-01-18 | 精工爱普生株式会社 | Electro-optical device, method of manufacturing the same, and electronic apparatus using electro-optical device |
| CN102067242A (en) * | 2008-06-21 | 2011-05-18 | 兰斯维克多公司 | Electro-optical devices using dynamic reconfiguration of effective electrode structures |
| CN102902129A (en) * | 2012-11-14 | 2013-01-30 | 中航华东光电有限公司 | Liquid crystal lens |
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