CN106168727A - Liquid crystal lens array, imaging device and method - Google Patents
Liquid crystal lens array, imaging device and method Download PDFInfo
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- CN106168727A CN106168727A CN201610755321.1A CN201610755321A CN106168727A CN 106168727 A CN106168727 A CN 106168727A CN 201610755321 A CN201610755321 A CN 201610755321A CN 106168727 A CN106168727 A CN 106168727A
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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
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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
- G02F1/01—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 intensity, phase, polarisation or colour
- G02F1/13—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 intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The open a kind of liquid crystal lens array of the present invention, imaging device and method.This liquid crystal lens array includes: multiple liquid crystal lens in array distribution and lens arra driver element, this each liquid crystal lens of lens arra drive unit drives switches between lens state and non-lens state, wherein, in a drive cycle, in the T1 moment, the first liquid crystal lens in arbitrary neighborhood two liquid crystal lens that spacing distance is nearest is in lens state, and the second liquid crystal lens is in non-lens state；In the T2 moment, this first liquid crystal lens is in non-lens state, and this second liquid crystal lens is in lens state.Invention additionally discloses imaging device based on above-mentioned liquid crystal lens array and formation method.The present invention can improve the aperture opening ratio of liquid crystal lens array, physically achieves the overlapping of lens imaging, it is simple to design of Optical System, simplifies image mosaic intractability, improve the image resolution ratio of imaging system, can obtain preferably image quality.
Description
Technical field
The present invention relates to liquid crystal lens technical field, be specifically related to a kind of liquid crystal lens array, there is above-mentioned liquid crystal lens
The imaging device of array and formation method.
Background technology
Due to liquid crystal lens array device, to have volume little, lightweight, the advantages such as power consumption is little, and it realizes without mechanical part
The feature of adjustable focal length shows exclusive advantage.Through development in recent years, liquid crystal lens and array thereof optical communication device,
The various fields such as fiber switch, optical deflection device, 3D show, integrated image system and image procossing have great potential application
It is worth.
In the prior art, when using liquid crystal lens array imaging, in order to obtain high-quality image, need to increase liquid crystal
The aperture opening ratio (Aperture) of lens arra, this is accomplished by making the spacing between liquid crystal lens reduce as far as possible.Experimental studies have found that,
In liquid crystal lens array, when the spacing of adjacent two liquid crystal lens is less, use the driving of existing liquid crystal lens array
Mode, will likely result in and produce interference between closest adjacent two liquid crystal lens, and this interference should to liquid crystal lens array
Time in the technical fields such as imaging, influence whether image quality.
Summary of the invention
The present invention provides a kind of liquid crystal lens array, imaging device and formation method, saturating in order to solve prior art liquid crystal
Lens array produces between adjacent lcd lens the technical problem of interference for increasing opening rate.
For reaching above-mentioned purpose, the present invention provides a kind of liquid crystal lens array, including: multiple liquid crystal in array distribution are saturating
Mirror and lens arra driver element, the described each liquid crystal lens of lens arra drive unit drives is in lens state and non-lenticular
Switch between state, wherein, in a drive cycle, in the T1 moment, in arbitrary neighborhood two liquid crystal lens that spacing distance is nearest
The first liquid crystal lens be in lens state, the second liquid crystal lens is in non-lens state；In the T2 moment, described first liquid crystal is saturating
Mirror is in non-lens state, and described second liquid crystal lens is in lens state.
Preferably, described lens arra driver element includes:
Micro-control circuit, is used for controlling the work of described lens arra driver element；
Signal generating circuit, for producing the initial driving signal driving described liquid crystal lens；
Address decoder, for receiving the signal inquiring about liquid crystal lens address to be driven of described micro-control circuit output,
Export the address information of described liquid crystal lens to be driven；
Signal amplitude modulation circuit, according to the control signal of the liquid crystal lens described to be driven that described micro-control circuit exports
And the address information that described address decoder sends, described initial driving signal is carried out output drive signal after amplitude modulation
Drive the described to be driven liquid crystal lens corresponding with described address information.
It is preferred that described lens arra driver element includes: peaking circuit, for described signal generating circuit is produced
Raw described initial driving signal removes DC component therein, and then output is to described signal amplitude modulation circuit.
It is preferred that described signal amplitude modulation circuit includes: multiple signal amplitude modulation modules, each signal amplitude is modulated
The corresponding liquid crystal lens of module, and each signal amplitude modulation module exports the first driving voltage and is different from described first and drives
Second driving voltage of galvanic electricity pressure drives corresponding described liquid crystal lens.
Preferably, described address decoder is outputed signal to by tft array or FPGA with described micro-control circuit
Described signal amplitude modulation circuit.
It is preferred that described micro-control circuit includes the data driver for exporting control signal, described address decoder
Described signal amplitude modulation circuit, wherein, data driver is outputed signal to by described tft array with described data driver
Exporting control signal by multichannel data line, described address decoder is by multiple address wire OPADD information, tft array bag
Including multiple thin film transistor (TFT), each thin film transistor (TFT) includes that source electrode, grid and drain electrode, described source electrode are connected to a data wire, institute
Stating grid and be connected to an address wire, described drain electrode is connected to described signal amplitude modulation circuit.
Preferably, described liquid crystal lens includes: each described liquid crystal lens includes first substrate, second substrate, is located at institute
State the first electrode on first substrate, the second electrode and the 3rd electrode being located on described second substrate, and be located at described
Liquid crystal layer between two electrodes and the 3rd electrode, described first electrode is insulated from each other and at least part of with described second electrode
The most overlapping, described first electrode and the second electrode are drive electrode, and described 3rd electrode is public electrode.
Preferably, described second electrode is rounded or regular hexagon.
The present invention also provides for a kind of imaging device, forms scene image for shooting one scene, including: main lens unit,
Imageing sensor, image process controller and memorizer.Described imaging device also includes: liquid crystal lens array, and described liquid crystal is saturating
Lens array is located between described main lens unit and described imageing sensor, and described image process controller calls described memorizer
The programmed instruction of middle storage controls described imageing sensor and the work of described liquid crystal lens array, wherein, described liquid crystal lens battle array
It is classified as foregoing liquid crystal lens array.
The present invention also provides for a kind of formation method, and described formation method forms scene image for shooting one scene, including:
S10 provides a liquid crystal lens array, including: multiple liquid crystal lens in array distribution and lens arra driver element, described
The each liquid crystal lens of lens arra drive unit drives switches between lens state and non-lens state；S20 drives week at one
In phase, in the T1 moment, the first liquid crystal lens in arbitrary neighborhood two liquid crystal lens that driving spacing distance is nearest is in lenticular
State, the second liquid crystal lens is in non-lens state；S30, in the T2 moment, drives described first liquid crystal lens to be in non-lens state,
Described second liquid crystal lens is in lens state；S40 is in the first of lens state according to the first liquid crystal lens described in the T1 moment
Second liquid crystal lens described in image and T2 moment is in the second image of lens state and synthesizes described scene image.
The liquid crystal lens array of the present invention, imaging device and method, by by liquid crystal lens closest for any two
Be respectively at lens state and non-lens state at synchronization, can increase substantially liquid crystal lens array aperture opening ratio and not
Interference can be produced, physically achieve the overlapping of lens imaging, compared with the existing technology, not only without considering device in imaging system
The problem that part is arranged by the parameter specified, the design for optical system provides greater flexibility, and makes the body of optical system
Long-pending less, also simplify image processing algorithm, simplify image mosaic intractability, improve the response speed of imaging system,
And improve the resolution of image, preferably image quality can be obtained.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the liquid crystal lens array of better embodiment of the present invention.
Fig. 2 is that in Fig. 1, micro-control circuit and address decoder are connected signal amplitude modulation circuit by tft array
The concrete structure schematic diagram of embodiment.
Fig. 3 a is the structural representation of an embodiment of liquid crystal lens in Fig. 1.
Fig. 3 b is the structural representation of another embodiment of liquid crystal lens in Fig. 1.
Fig. 4 a is the arrangement schematic diagram of second one embodiment of electrode of liquid crystal lens in Fig. 3 a.
Fig. 4 b is the arrangement schematic diagram of second another embodiment of electrode of liquid crystal lens in Fig. 3 a.
Fig. 5 is the structural representation of the imaging device of better embodiment of the present invention.
Fig. 6 is the schematic flow sheet of the formation method of better embodiment of the present invention.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.If it should be noted that do not conflict, this
Each feature in bright embodiment and embodiment can be combined with each other, all within protection scope of the present invention.
Refer to the electrical block diagram of the liquid crystal lens array that Fig. 1, Fig. 1 are better embodiment of the present invention.Such as Fig. 1
Shown in, the present invention provides a kind of liquid crystal lens array, including: multiple liquid crystal lens 410,420,430 in array distribution, and
Lens arra driver element 200.Described lens arra driver element 200 drives each liquid crystal lens 410,420,430 in lenticular
Switch between state and non-lens state.Wherein, in a drive cycle, in the T1 moment, the arbitrary neighborhood that spacing distance is nearest
The first liquid crystal lens 410 in two liquid crystal lens 410,420 is in lens state, and the second liquid crystal lens 420 is in non-lenticular
State；In the T2 moment, described first liquid crystal lens 410 is in non-lens state, and described second liquid crystal lens 420 is in lenticular
State.In above-mentioned drive cycle, the whole liquid crystal lens 410,420,430 in liquid crystal lens array are once in lenticular
State.Here lens state refers to the index distribution gradient arrangement in certain rule of liquid crystal lens 410,420,430, presents
Lens effect as glass lens, makes the refractive index of the liquid crystal molecule in liquid crystal cell arrange in gradient by applying voltage,
Present convex lens or concavees lens effect, and focus length also by changing driving voltage；Rather than lens state
Refer to that liquid crystal lens 410,420,430 is not powered on pressure or is applied with voltage but now in the vertical face of optical axis, refractive index is equal
Even distribution, does not produce refraction action to light.Thus the liquid crystal lens array of the present invention is by changing lens arra driver element
The driving voltage amplitude of 200 can realize convex lens (plus lens), concavees lens (minus lens) or to light without refraction parallel glass
The effect of glass plate.The most here the size present invention of the liquid crystal lens in liquid crystal lens array does not limit, and can be several millimeters
Millimetre-sized to tens, it is also possible to be smaller szie or larger sized, multiple liquid crystal lens are arranged according to the mode of array.
The liquid crystal lens array of the present invention, by locating liquid crystal lens closest for any two respectively at synchronization
In lens state and non-lens state, timesharing drives two closest liquid crystal lens to be in lens state, and when driving at
Lens area in lens state is more than its electrode area so that the lens area of two closest liquid crystal lens exists portion
Divide overlap, so that total aperture opening ratio of liquid crystal lens array is more than total aperture opening ratio of the glass lens array with aperture, permissible
The aperture opening ratio increasing substantially liquid crystal lens array disturbs without producing, and physically achieves the overlapping, for light of lens imaging
The design of system provides greater flexibility, and makes the volume of optical system less.
In a specific embodiment, described lens arra driver element 200 specifically includes:
Micro-control circuit 250, is used for controlling described lens arra driver element 200 and works；Here micro-control circuit 250
MCU (micro-control unit) or FPGA (Programmable logical controller array) circuit or DSP (Digital Signal Processing can be used
Device) circuit.Micro-control circuit 250 is control and the data processor of whole lens arra driver element 200, can be to lens array
Each main circuit parts of column unit 200 carries out independent control process.
Signal generating circuit 210, for producing the initial driving signal driving described liquid crystal lens；Signal generating circuit
210 generally produce square wave or sine wave, it is possible to be other waveform.If square waves etc. cannot be directly used to drive liquid crystal lens
Digital waveform, then be additionally provided with D/A converter module in signal generating circuit 210, is converted to digital square-wave to drive liquid
The analogue signal of brilliant lens functions.
Address decoder 240, for receiving the letter inquiring about liquid crystal lens address to be driven of described micro-control circuit output
Number, export the address information of described liquid crystal lens to be driven.Address decoder 20 carries out coding correspondence to each liquid crystal lens,
When driving liquid crystal lens array, accurately to find liquid crystal lens to be driven then to control its corresponding state.
Signal amplitude modulation circuit 230, according to the control of the liquid crystal lens described to be driven of described micro-control circuit 250 output
The address information that signal processed and described address decoder send, after described initial driving signal is carried out amplitude modulation, output is driven
Dynamic signal drives the described to be driven liquid crystal lens corresponding with described address information.Here signal amplitude modulation mainly depends on
According to control signal, initial driving signal is modulated, to meet the driving voltage requirement driving liquid crystal lens.
In a preferred embodiment, described lens arra driver element also includes: peaking circuit 220, for right
The described initial driving signal that described signal generating circuit 210 produces removes DC component therein, and then output is to described letter
Number amplitude modulation circuit 230.Direct current signal may be contained due in the signal that signal generating circuit 210 produces, direct current signal
Exist and influence whether the driving voltage of liquid crystal lens, and then affect the lens effect of liquid crystal lens, thus be necessary removal.
In a specific embodiment, described signal amplitude modulation circuit 230 includes: multiple signal amplitude modulation modules,
The corresponding liquid crystal lens of each signal amplitude modulation module, and each signal amplitude modulation module exports the first driving voltage V1
Corresponding described liquid crystal lens is driven with the second driving voltage V2.Here the first driving voltage V1's and the second driving voltage V2 is big
Little and frequency can change, in order to forms predetermined liquid crystal lens effect or is formed without lens.Additionally, signal amplitude modulation electricity
Road 230 may also be special integrated chip, is controlled the liquid crystal lens of correspondence by the output of each pin.
In a variant embodiment, described address decoder 240 and described micro-control circuit 250 by tft array or
FPGA outputs signal to described signal amplitude modulation circuit 230, and this output signal is for enabling signal, in order to the liquid specified
Brilliant lens carry out enabling control.Specifically, referring to Fig. 2, Fig. 2 is micro-control circuit 250 and address decoder 240 in Fig. 1
The concrete structure schematic diagram of an embodiment of signal amplitude modulation circuit 230 is connected by tft array.As in figure 2 it is shown, it is described
Micro-control circuit 250 includes the data driver 251 for exporting control signal, described address decoder 240 and described data
Driver 251 outputs signal to described signal amplitude modulation circuit 230, wherein, data driver 251 by described tft array
Exporting control signal by multichannel data line 252,253, described address decoder 240 is exported by multiple address wires 241,242
Address information, tft array includes that multiple thin film transistor (TFT) 243, each thin film transistor (TFT) 243 include source electrode 243b, grid 243a
With drain electrode 243c, described source electrode 243b be connected to a data wire 252 or 253, described grid 243a be connected to an address wire 241 or
242, described drain electrode 243c is connected to described signal amplitude modulation circuit 230.
In one embodiment, each liquid crystal lens 410,420,430 includes: first substrate, second substrate, be located at described
The first electrode, the second electrode and the 3rd electrode being located on described second substrate on first substrate, and it is located at described second
Liquid crystal layer between electrode and the 3rd electrode, described first electrode is insulated from each other and at least part of not with described second electrode
Overlap, described first electrode and the second electrode are drive electrode, and described 3rd electrode is public electrode, this first electrode, second
Electrode and the 3rd electrode are transparent material electrode, such as ITO electrode (indium tin oxide films).The structure of above-mentioned liquid crystal lens please be joined
Seeing the structural representation of the embodiment that Fig. 3 a and Fig. 3 b, Fig. 3 a are liquid crystal lens in Fig. 1, Fig. 3 b is liquid crystal lens in Fig. 1
The structural representation of another embodiment.As shown in Figure 3 a, liquid crystal lens 100 includes first substrate 110, second substrate 190
And the liquid crystal layer 170 between first substrate 110 and second substrate 190, first substrate 110 towards liquid crystal layer 170
Surface sets gradually electrode layer, the first insulating barrier 130, weakly conducting thin film 160 and the first alignment film layer 150a, wherein electrode layer
Including the first electrode 120 and the second electrode 140, the first electrode 120 is in circle hole shape, and the second electrode 140 is positioned at the first electrode 120
In circular hole, rounded or regular hexagon.Second substrate 190 surface is sequentially provided with the 3rd electrode 180 and the second alignment film layer 150b.
First alignment film layer 150a and the second alignment film layer 150b provides an initial orientation to the liquid crystal molecule of liquid crystal layer 170 respectively,
Make liquid crystal molecule with certain tilt angle arrangement.In above-mentioned liquid crystal lens structure, the 3rd electrode as public electrode 180, and
One electrode 120 and the second electrode 140, as drive electrode, receive the signal amplitude modulation of signal amplitude modulation circuit 230 respectively
The first driving voltage V1 and the second driving voltage V2 of module output, drive liquid crystal lens lens state or non-lens state it
Between switch.
As shown in Figure 3 b, the another kind of liquid crystal lens 10 of the present invention includes: first substrate 11 and second substrate 19 and position
Liquid crystal layer 17 between first substrate 11 and second substrate 19.First substrate 11 depends on towards a side surface of described liquid crystal layer 17
Secondary first electrode the 12, first insulating barrier the 13, second electrode 14 and the first alignment film layer 15a that is provided with, wherein the second electrode 14 in
Circle hole shape, is provided with weakly conducting thin film 18 in the second electrode 14, and this weakly conducting thin film 18 is rounded.Second substrate 19 is towards liquid crystal
One side surface of layer 17 is sequentially provided with the 3rd electrode 16 and the second alignment film layer 15b.The liquid crystal lens of the present embodiment and Fig. 3 a
The difference of liquid crystal lens essentially consist in the difference in structure, principle is identical.
Referring to Fig. 4 a and Fig. 4 b, Fig. 4 a is the arrangement signal of second one embodiment of electrode of liquid crystal lens in Fig. 3 a
Figure, Fig. 4 b is the arrangement schematic diagram of second another embodiment of electrode of liquid crystal lens in Fig. 3 a.As shown in fig. 4 a, it is multiple
Second electrode of liquid crystal lens arranges according to array format, the corresponding liquid crystal lens of each second electrode, each second electrode
Label number uniquely determined by line number and row, as 101a represents that the 101st arranges a electrode, figure is illustrated have label 101,102,
103,104,105 and 106 totally 6 row the second electrodes, often row has a, b, c, d, e and f row totally 6 row the second electrode.Can from figure
Going out, second electrode adjacent for electrode 101a with second has the second electrode 101b, the second electrode 102a and the second electrode 102b, its
In, the distance of center circle between the second electrode 101a and the second electrode 101b and 102a is between d1, and the second electrode 102b
Distance of center circle is d2 (d2 ＞ d1 ＞ 0).It is to say, the second liquid crystal lens corresponding for electrode 101a is corresponding with the second electrode 101b
The liquid crystal lens and second that the distance of liquid crystal lens and the second liquid crystal lens corresponding for electrode 102a is more corresponding for electrode 101a than second
The distance of the liquid crystal lens that electrode 102b is corresponding wants near.Therefore, in the same driving moment, the second corresponding for electrode 101a liquid crystal is saturating
The state of mirror and the second liquid crystal lens corresponding for electrode 102b is identical, and the second liquid crystal lens corresponding for electrode 101a and the second electricity
Corresponding for pole 102a liquid crystal lens, the state of the second liquid crystal lens corresponding for electrode 102a are different.Here state is identical to be referred to
It is in lens state, or non-lens state.Here state difference refers to one when being in lens state, and another is in non-
Specular state.Similarly, if selecting the second electrode 102b as basis reference, the second electrode on the second electrode 102b diagonal
The liquid crystal lens that 101a, the second electrode 101c, the second electrode 103a and the second electrode 103c are the most corresponding drives the moment same
State is identical, and nearest the second electrode 101b of distance the second electrode 102b, the second electrode 102a, the second electrode 102c and second
Liquid crystal lens the most corresponding for electrode 103b is different in same driving moment state.
Refer to the structural representation of the imaging device that Fig. 5, Fig. 5 are better embodiment of the present invention.As it is shown in figure 5, this
The imaging device of invention better embodiment, forms scene image for shooting one scene 41, including:
Main lens unit 42, is positioned at the scene 41 of main lens unit 42 side for shooting and images in main lens unit 42
Opposite side, including multiple optical lenses, optical lenses of these combinations may be constructed common pick-up lens.
Imageing sensor 44 for being converted into the signal of telecommunication by the scene image of acquisition, and exports the described signal of telecommunication as image
Signal.Here imageing sensor 44 can be selected for CCD or cmos sensor.
Memorizer 46, storage has for realizing liquid crystal lens array control and one section of programmed instruction of image procossing.These
Programmed instruction is mainly used in imaging device and realizes varifocal imaging function.
Image process controller 45, is connected with memorizer 46, liquid crystal lens array 43 and imageing sensor 44, controls whole
Individual imaging device works.
Described imaging device also includes: liquid crystal lens array 43, and described liquid crystal lens array 43 is located at described main lens list
Between unit 42 and described imageing sensor 44, described image process controller 45 calls the program of storage in described memorizer 46 and refers to
Order controls described imageing sensor 44 and described liquid crystal lens array 43 works, and wherein, described liquid crystal lens array 43 is as front
Described liquid crystal lens array, refers to Fig. 1 to Fig. 5 and above relevant about the detailed description of the structure of liquid crystal lens array
Describe, do not repeat them here.
The imaging device of the present invention is owing to have employed foregoing liquid crystal lens arra, by by liquid closest for any two
Brilliant lens are respectively at lens state and non-lens state at synchronization, and timesharing drives at two closest liquid crystal lens
In lens state, and it is in the lens area of lens state when driving more than its electrode area so that two closest liquid
The lens area existence of brilliant lens partly overlaps, so that total aperture opening ratio of liquid crystal lens array is saturating more than the glass with aperture
Total aperture opening ratio of lens array, the aperture opening ratio that can increase substantially liquid crystal lens array disturbs without producing, thus at physics
On achieve the overlapping of lens imaging.Compared with the existing technology, not only without device in considering imaging system by the parameter specified
The problem arranged, the design for optical system provides greater flexibility, and makes the volume of optical system less, also simplify
Image processing algorithm, owing to the image obtained overlaps, thus simplifies image mosaic intractability, improves imaging system
The response speed of system, and improve the resolution of image, preferably image quality can be obtained.
Refer to the schematic flow sheet of the formation method that Fig. 6, Fig. 6 are better embodiment of the present invention.As shown in Figure 6, originally
The formation method of invention better embodiment, forms scene image for shooting one scene, mainly comprises the steps that
S10 provides a liquid crystal lens array, including: multiple liquid crystal lens in array distribution and lens arra drive single
Unit, the described each liquid crystal lens of lens arra drive unit drives switches between lens state and non-lens state；Need exist for
It is noted that lens arra driver element is individually to control each liquid crystal lens, it is possible to be packet control, the liquid of different groups
Brilliant lens are in different states at synchronization, are in identical state with the liquid crystal lens of group at synchronization, so may be used
Lower simplification line construction.
S20 is in a drive cycle, in the T1 moment, in arbitrary neighborhood two liquid crystal lens that driving spacing distance is nearest
First liquid crystal lens is in lens state, and the second liquid crystal lens is in non-lens state；
S30, in the T2 moment, drives described first liquid crystal lens to be in non-lens state, and described second liquid crystal lens is in
Specular state；
S40 is in the second liquid described in the first image of lens state and T2 moment according to the first liquid crystal lens described in the T1 moment
Brilliant lens are in the second image of lens state and synthesize described scene image.
Additionally, also include between step S10 and step S20:
S21 address information obtaining step, obtains the address information of each liquid crystal lens；
S22 judges step, according to the address information of each liquid crystal lens, qualitatively judges each liquid crystal in liquid crystal lens array saturating
Spacing distance between mirror is far and near.
The formation method using liquid crystal lens array of the present invention, by existing liquid crystal lens closest for any two
Synchronization is respectively at lens state and non-lens state, and timesharing drives two closest liquid crystal lens to be in lenticular
State, and it is in the lens area of lens state when driving more than its electrode area so that two closest liquid crystal lens
Lens area existence partly overlaps, so that total aperture opening ratio of liquid crystal lens array is more than the glass lens array with aperture
Total aperture opening ratio, the aperture opening ratio that can increase substantially liquid crystal lens array disturbs without producing, thus achieves physically
Overlapping of lens imaging.Compared with the existing technology, not only without considering that device in imaging system is arranged by the parameter specified
Problem, the design for optical system provides greater flexibility, and makes the volume of optical system less, also simplify image procossing
Algorithm, owing to the image obtained overlaps, thus simplifies image mosaic intractability, improves the response of imaging system
Speed, and improve the resolution of image, preferably image quality can be obtained.
The present invention use the imaging device of above-mentioned liquid crystal lens array and formation method can be applicable to capsule medical apparatus,
Aerial photography equipment, intelligent automobile, robot, Intelligent worn device, supervision equipment, medical microscope, minimally invasive medical equipment with
And in the electronic equipment such as the guided missile of band photographic head.
The foregoing is only embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilization is originally
Equivalent structure or equivalence flow process that description of the invention and accompanying drawing content are made convert, or are directly or indirectly used in what other were correlated with
Technical field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (10)
1. a liquid crystal lens array, it is characterised in that including: multiple liquid crystal lens in array distribution and lens arra drive
Moving cell, the described each liquid crystal lens of lens arra drive unit drives switches between lens state and non-lens state, wherein,
In a drive cycle, in the T1 moment, at the first liquid crystal lens in arbitrary neighborhood two liquid crystal lens that spacing distance is nearest
In lens state, the second liquid crystal lens is in non-lens state；In the T2 moment, described first liquid crystal lens is in non-lenticular
State, described second liquid crystal lens is in lens state.
2. liquid crystal lens array as claimed in claim 1, it is characterised in that, described lens arra driver element includes:
Micro-control circuit, is used for controlling the work of described lens arra driver element；
Signal generating circuit, for producing the initial driving signal driving described liquid crystal lens；
Address decoder, for receiving the signal inquiring about liquid crystal lens address to be driven of described micro-control circuit output, output
The address information of described liquid crystal lens to be driven；
Signal amplitude modulation circuit, the control signal of the liquid crystal lens described to be driven exported according to described micro-control circuit and
The address information that described address decoder sends, after described initial driving signal carries out amplitude modulation, output drive signal drives
The described to be driven liquid crystal lens corresponding with described address information.
3. liquid crystal lens array as claimed in claim 2, it is characterised in that, described lens arra driver element includes:
Peaking circuit, the described initial driving signal for producing described signal generating circuit is removed direct current therein and is divided
Amount, then output is to described signal amplitude modulation circuit.
4. liquid crystal lens array as claimed in claim 3, it is characterised in that, described signal amplitude modulation circuit includes:
Multiple signal amplitude modulation modules, the corresponding liquid crystal lens of each signal amplitude modulation module, and each signal amplitude
Modulation module exports the first driving voltage and drives corresponding described with the second driving voltage being different from described first driving voltage
Liquid crystal lens.
5. liquid crystal lens array as claimed in claim 4, it is characterised in that, described address decoder and described micro-control circuit
Described signal amplitude modulation circuit is outputed signal to by tft array or FPGA.
6. liquid crystal lens array as claimed in claim 5, it is characterised in that, described micro-control circuit includes for exporting control
The data driver of signal, described address decoder outputs signal to described with described data driver by described tft array
Signal amplitude modulation circuit, wherein, described data driver exports control signal, described address decoder by multichannel data line
By multiple address wire OPADD information, described tft array includes that multiple thin film transistor (TFT), each thin film transistor (TFT) include source
Pole, grid and drain electrode, described source electrode is connected to a data wire, and described grid is connected to an address wire, and described drain electrode is connected to institute
State signal amplitude modulation circuit.
7. the liquid crystal lens array as according to any one of claim 2 to 6, it is characterised in that, described liquid crystal lens includes: every
Liquid crystal lens described in one includes first substrate, second substrate, the first electrode being located on described first substrate, the second electrode and sets
The 3rd electrode on described second substrate, and it is located at the liquid crystal layer between described second electrode and the 3rd electrode, described
One electrode is insulated from each other and at least part of with described second electrode the most overlapping, and described first electrode and the second electrode are for driving
Electrode, described 3rd electrode is public electrode.
8. liquid crystal lens array as claimed in claim 7, it is characterised in that, described second electrode is rounded or regular hexagon.
9. an imaging device, forms scene image for shooting one scene, including: main lens unit, imageing sensor, image
Processing controller and memorizer, it is characterised in that described imaging device also includes: liquid crystal lens array, described liquid crystal lens battle array
Row are located between described main lens unit and described imageing sensor, and described image process controller calls in described memorizer and deposits
The programmed instruction of storage controls described imageing sensor and the work of described liquid crystal lens array, and wherein, described liquid crystal lens array is
Liquid crystal lens array described in any one of claim 1 to 8.
10. a formation method, it is characterised in that described formation method forms scene image for shooting one scene, including:
S10 provides a liquid crystal lens array, including: multiple liquid crystal lens in array distribution and lens arra driver element,
The described each liquid crystal lens of lens arra drive unit drives switches between lens state and non-lens state；
S20 is in a drive cycle, in the T1 moment, and first in arbitrary neighborhood two liquid crystal lens that driving spacing distance is nearest
Liquid crystal lens is in lens state, and the second liquid crystal lens is in non-lens state；
S30, in the T2 moment, drives described first liquid crystal lens to be in non-lens state, and described second liquid crystal lens is in lenticular
State；
It is saturating that S40 is in the second liquid crystal described in the first image of lens state and T2 moment according to the first liquid crystal lens described in the T1 moment
Mirror is in the second image of lens state and synthesizes described scene image.
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