CN106597727A - Electronic control dimming film with adjustable angle scope of transmission light - Google Patents
Electronic control dimming film with adjustable angle scope of transmission light Download PDFInfo
- Publication number
- CN106597727A CN106597727A CN201710017771.5A CN201710017771A CN106597727A CN 106597727 A CN106597727 A CN 106597727A CN 201710017771 A CN201710017771 A CN 201710017771A CN 106597727 A CN106597727 A CN 106597727A
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- Prior art keywords
- film
- light
- transmission
- angular range
- striped
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Classifications
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Dispersion Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to an electronic control dimming film with an adjustable angle scope of transmission light. The electronic control dimming film comprises a first transmission film, a polymer dispersing liquid crystal film layer and a second transmission film, wherein the first transmission film is located on a light transmission side; the second transmission film is located on an incident light side; a periodical light shielding stripe is arranged on the inner side or outer side of the second transmission film; the polymer dispersing liquid crystal film layer is located between the first transmission film and the second transmission film; under the closing condition of an electric field, the polymer dispersing liquid crystal film layer is under a light scattering state and the transmission light is distributed in a wider angle scope; and under the opening condition of the electric field, the polymer dispersing liquid crystal film layer is under a transparent state and the transmission light is distributed in a narrower angle scope after the incident light passes by the periodical light shielding stripe. The electronic control dimming film provided by the invention is characterized by adjustable angle scope of transmission light. The electronic control dimming film is expected to be applied to a display. Through the opening and closing of the electric field, the display can be switched between different visual angles and between anti-peeping state and non-anti-peeping state.
Description
Technical field
The present invention relates to optics technical field of membrane, more particularly to a kind of transmitted light based on PDLC (PDLC)
The regulatable electric-controlled light-regulating film of angular range.
Background technology
The concept of PDLC (PDLC) starts from 20th century the mid-80, and rapid from " in scientist's handss
Toy " develops into the electrical-optical responsive materials for having basic research and using value concurrently.Polymer dispersion liquid crystal material is by nematic phase
The composite formed during liquid crystal droplet is dispersed in polymer network matrix.The electro-optic response principle schematic of pdlc film
As shown in Figure 1.It is certain thickness pdlc film to be coated with two pieces between the substrate of ITO (tin indium oxide) conductive layer, liquid crystal droplet
It is randomly dispersed in the network of polymer.When electric field is not added with, as the director of liquid crystal droplet is in random, pdlc film is in
Light-scattering state；When a sufficiently strong external electric field is applied to which, liquid crystal molecule is arranged along the direction of electric field, and pdlc film is in saturating
Bright state.
As the electronic products such as developing rapidly for modern science and technology, computer, mobile phone are more and more applied to people's
In work and life, it is that people bring great convenience and enjoyment.However, while people widely use electronic product,
As electronic product screen visible angle is larger, people are easy to be peeped by other people when data is browsed by screen, cause individual
People's privacy and Enterprise business secret are faced with great risk.Therefore, in some occasions, need display that there is peep-proof function
Prevent information leakage when using electronic product.
Minnesota Mining and Manufacturing Company takes the lead in developing peep-proof film using the structure with ultra tiny shutter (MICROLOUVER).Should
The structural representation of peep-proof film is as shown in Figure 2.When the peep-proof film is used for display, specialize in can the data that screen display goes out
User front is read, and viewing area is 60 degree (± 30 degree), and anyone can only see pitch-dark picture outside viewing area, so as to
Reach the purpose of protection individual privacy and Enterprise business secret.But the peep-proof film does not possess to be cut between peep-proof and non-peep-proof state
The characteristic changed.
The content of the invention
It is an object of the invention to overcome existing peep-proof film not possess the spy switched between peep-proof and non-peep-proof state
Property, so as to provide a kind of electric-controlled light-regulating film that can regulate and control transmitted light angular range.
To achieve these goals, the invention provides a kind of regulatable electric-controlled light-regulating film of transmitted light angular range, bag
Include：The first transmission film, polymer dispersed liquid crystal film layer positioned at side of transmitted light, positioned at the second transmission film of incident illumination side, it is described
The inner side of the close polymer dispersed liquid crystal film layer of the second transmission film or the outside away from polymer dispersed liquid crystal film layer carry week
Phase property light covers striped；The polymer dispersed liquid crystal film layer is located between first transmission film and the second transmission film.
In above-mentioned technical proposal, first transmission film or the second transmission film are：Transparent ITO conductive film layers or nano-silver thread
Film or graphene film or conducting polymer film.
In above-mentioned technical proposal, the polymer dispersed liquid crystal film layer is prepared using one of following method：Ultraviolet curing method,
Thermal curing method, solvent volatilization split-phase method, hot split-phase method.
In above-mentioned technical proposal, the periodicity light masking striped adopts organic material or inorganic material or metal material system
It is standby to form.
In above-mentioned technical proposal, the periodicity light masking striped is prepared using one of following method：Machining, print
Brush, printing, evaporation, photoetching, local photopolymerization is carried out using mask.
In above-mentioned technical proposal, the periodicity light masking striped is striated, its width of fringe or adjacent stripes spacing
From being nanometer to grade.
In above-mentioned technical proposal, the thickness of the polymer dispersed liquid crystal film layer, the periodicity light cover the thickness of striped
Spend is nanometer to grade.For periodicity light covers electric-controlled light-regulating film of the striped on the inside of the second transmission film, the periodicity
Thickness of the thickness of light masking striped less than the polymer dispersed liquid crystal film layer.
In above-mentioned technical proposal, polymer dispersed liquid crystal film layer liquid crystal molecule under electric field action is taken along direction of an electric field
To polymer dispersed liquid crystal film layer is changed into clear state from scattering states, and incident illumination is subject to after periodicity light masking striated structure
Periodicity light covers the restriction of striped, and transmitted light is distributed in a narrower angular range；After electric field is closed, polymer point
Dispersion liquid hyaline layer is converted to scattering states from clear state, and transmitted light is distributed in the range of a wider angle.
Present invention also offers a kind of display, the transmitted light angular range regulatable electric-controlled light-regulating film is applied to
Display, by the opening and closing of electric field, makes display switch between peep-proof and non-peep-proof state.
It is an advantage of the current invention that：
1st, electric-controlled light-regulating film of the invention being turned on and off by electric field, can adjust to transmitted light angular range
Control.
2nd, electric-controlled light-regulating film of the invention is expected to be applied to display, by the opening and closing of electric field, can make display
Device is switched between different visual angles, i.e., switch between peep-proof and non-peep-proof state.
Description of the drawings
Fig. 1 is the electro-optic response principle schematic of pdlc film；
Fig. 2 is the structural representation of the peep-proof film of the ultra tiny shutter of Minnesota Mining and Manufacturing Company's exploitation；
Fig. 3 is that a kind of regulatable electric-controlled light-regulating film of transmitted light angular range of the present invention in embodiment 1 is closed in electric field
When schematic diagram；
Fig. 4 is that a kind of regulatable electric-controlled light-regulating film of transmitted light angular range of the present invention in embodiment 1 is opened in electric field
When schematic diagram；
Fig. 5 is schematic diagram mask used when prepared by periodicity light masking striped；
Fig. 6 is the optical microscope that periodicity light covers striped；
Fig. 7 is a kind of angle-light intensity of the regulatable electric-controlled light-regulating film of transmitted light angular range of the present invention in embodiment 1
Curve；
Fig. 8 is that a kind of regulatable electric-controlled light-regulating film of transmitted light angular range of the present invention in embodiment 2 is closed in electric field
When schematic diagram；
Fig. 9 is that a kind of regulatable electric-controlled light-regulating film of transmitted light angular range of the present invention in embodiment 2 is opened in electric field
When schematic diagram；
Figure 10 is a kind of angle-light of the regulatable electric-controlled light-regulating film of transmitted light angular range of the present invention in embodiment 2
Strong curve.
Specific embodiment
In conjunction with accompanying drawing, the invention will be further described.
Embodiment 1
As shown in figure 3, in the present embodiment, the regulatable electric-controlled light-regulating film bag of a kind of transmitted light angular range of the present invention
Include：The transparent ITO conductive film layers (side of transmitted light) that set gradually from top to bottom, pdlc film layer, inner side are covered with periodicity light
The transparent ITO conductive film layers (incident illumination side) of striped.
The pdlc film layer can be using preparation sides such as ultraviolet curing method, thermal curing method, solvent volatilization split-phase method, hot split-phase methods
Prepared by method, other preparation methoies known in those skilled in the art may also be employed and prepares.In the present embodiment, pdlc film layer
Preparation process is as follows：Photopolymerizable monomer, liquid crystal, light trigger, glass microballoon mixture are clipped in into the transparent ITO of side of transmitted light
Centre on the inside of the transparent ITO conductive film layers of conductive film layer and incident illumination side, using 5mw/cm2Ultraviolet light, from side of transmitted light
Transparent ITO conductive film layers side irradiation 300s, make photo polymerization monomer polymerization in mixture, so as to pdlc film layer is obtained.
Pdlc film layer has the characteristic of optical transition, and when electric field is closed, pdlc film layer is presented light scattering state (such as Fig. 3 institutes
Show)；When electric field is opened, pdlc film layer is presented clear state (as shown in Figure 4).
The periodicity light masking striped can be prepared from using organic material, such as organic oil ink, organic dyestuff；Also can be by
Inorganic material is prepared from, such as white carbon black, inorganic dyestuff；Can also be prepared from by metal material, such as gold, silver and hydrargyrum etc..
Its preparation method is included but is not limited to：By above-mentioned material by machining, printing, printing, evaporation, photoetching, entered using mask
Row local photopolymerization etc..In the present embodiment, the preparation process of periodicity light masking striped is：In the transparent ITO of incident illumination side
UV cured printing inks in the inner side spin coating of conductive film layer, using 5mw/cm2Ultraviolet light, through structure as shown in Figure 5 mask shine
600s is penetrated, then uncured portion is washed with the mixed solvent of normal hexane, hexamethylene and acetone, so as to inner side is obtained with week
Phase property light covers the transparent ITO conductive film layers of striped.The optical microscope of periodicity light masking striped is as shown in Figure 6.
The periodicity light covers the width b of striped1, and any two adjacent light masking it is interfringe apart from b2Can be
To grade, the two size be able to can also be differed nanometer with identical.In the present embodiment, periodicity light masking structure is striped
Shape, but its shape is not limited to striated, in other embodiments, or the other shapes such as grid.
The thickness h of described pdlc film layer1, described periodicity light cover the thickness h of striped2Can for nanometer to millimeter
Level.In the present embodiment, due to periodicity light masking striped (incident illumination side) on the inside of the transparent ITO conductive film layers, therefore the cycle
Property light cover striped thickness h2Should be less than the thickness h of described pdlc film layer1.Preferably, the pdlc film thickness degree is about 40
Micron, about 30 microns of the thickness of the periodicity light shield layer.
Transparent ITO conductive film layers in the present embodiment may also be employed in other embodiments nano-silver thread film, graphene film,
Conducting polymer film etc. replaces, and other similar materials may also be employed and replaces.
Angle-light intensity curves of the Fig. 7 for the regulatable electric-controlled light-regulating film of the present embodiment transmitted light angular range.The curve is
The result that light is tested when incident from the transparent ITO conductive film layers side of incident illumination side.As can be seen from the figure：Not applied voltage
When, transmitted intensity is weaker, but dependence of angle is less；After applying 20V voltages, transmitted intensity becomes strong, but dependence of angle
Increase.Therefore, by the opening and closing of applying electric field, it is possible to which the transmitted light angular range of the electric-controlled light-regulating film is adjusted
Control.
In the case where electric field is closed, as shown in figure 3, pdlc film layer is in light-scattering state, transmitted light is distributed in-α1～+α1
Wider angle in the range of；In the case where electric field is opened, as shown in figure 4, the transparent state of pdlc film layer, incident illumination is through week
After phase property light masking striated structure, due to being limited by periodicity light masking striped, transmitted light can only be distributed in-α2～+α2's
In the range of relative narrow-angle.The electric-controlled light-regulating film of the present invention has the regulatable feature of transmitted light angular range.The electric-controlled light-regulating film
It is expected to be applied to display, by the opening and closing of electric field, display can be made to switch between different visual angles, that is, existed
Switch between peep-proof and non-peep-proof state.
Embodiment 2
The present embodiment difference from Example 1 is：As shown in figure 8, in the present embodiment, a kind of transmission angular model
The periodicity light masking striped for enclosing regulatable electric-controlled light-regulating film is the outside of the transparent ITO conductive film layers in incident illumination side, i.e.,
In the side away from transparent ITO conductive film layers.When electric field is closed, pdlc film layer is presented light scattering state (as shown in Figure 8)；Electric field is opened
Qi Shi, pdlc film layer are presented clear state (as shown in Figure 9).
Preferably, about 20 microns of the pdlc film thickness degree, the thickness about 20 of described periodicity light shield layer are micro-
Rice.
Figure 10 is bent for a kind of angle-light intensity of the regulatable electric-controlled light-regulating film of transmitted light angular range in the present embodiment
Line.The curve is the result that light is tested when incident from the transparent ITO conductive film layers side of incident illumination side.Can from figure
Go out, embodiment 2 has similar optical property to embodiment 1.
The remainder of the present embodiment is same as Example 1, repeats no more here.
It should be noted last that, above example is only to illustrate technical scheme and unrestricted.Although ginseng
The present invention is described in detail according to embodiment, it will be understood by those within the art that, the technical side to the present invention
Case is modified or equivalent, and without departure from the spirit and scope of technical solution of the present invention, which all should be covered in the present invention
Right in the middle of.
Claims (9)
1. the regulatable electric-controlled light-regulating film of a kind of transmitted light angular range, it is characterised in that include：Positioned at the first of side of transmitted light
Transmission film, polymer dispersed liquid crystal film layer, positioned at the second transmission film of incident illumination side, the close polymer of second transmission film
Striped is covered with periodicity light in the inner side of dispersed LCD film layer or the outside away from polymer dispersed liquid crystal film layer；The polymerization
Thing dispersed LCD film layer is located between first transmission film and the second transmission film.
2. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that described first
Transmission film or the second transmission film are：Transparent ITO conductive film layers or nano-silver thread film or graphene film or conducting polymer film.
3. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that the polymerization
Thing dispersed LCD film layer is prepared using one of following method：Ultraviolet curing method, thermal curing method, solvent volatilization split-phase method, hot split-phase
Method.
4. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that the cycle
Property light masking striped be prepared from using organic material or inorganic material or metal material.
5. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that the cycle
Property light masking striped prepared using one of following method：Machining, printing, printing, evaporation, photoetching, office is carried out using mask
Portion's photopolymerization.
6. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that the cycle
Property light masking striped be striated, between its width of fringe or adjacent stripes distance be nanometer to grade.
7. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that the polymerization
The thickness of thing dispersed LCD film layer, the thickness of periodicity light masking striped are nanometer to grade.For periodicity light hides
Electric-controlled light-regulating film of the striped on the inside of the second transmission film is covered, the thickness of the periodicity light masking striped is less than the polymer point
The thickness of dispersion liquid hyaline layer.
8. the regulatable electric-controlled light-regulating film of transmitted light angular range according to claim 1, it is characterised in that the polymerization
Thing dispersed LCD film layer liquid crystal molecule under electric field action is orientated along direction of an electric field, and polymer dispersed liquid crystal film layer is become by scattering states
For clear state, incident illumination is limited by periodicity light masking striped, transmitted light point after periodicity light masking striated structure
Cloth is in a narrower angular range；After electric field is closed, polymer dispersed liquid crystal film layer is converted to scattering states from clear state,
Transmitted light is distributed in the range of a wider angle.
9. a kind of display, by the regulatable electric-controlled light-regulating film application of the transmitted light angular range of one of claim 1-8
In display, by the opening and closing of electric field, display is made to switch between peep-proof and non-peep-proof state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017771.5A CN106597727A (en) | 2017-01-11 | 2017-01-11 | Electronic control dimming film with adjustable angle scope of transmission light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017771.5A CN106597727A (en) | 2017-01-11 | 2017-01-11 | Electronic control dimming film with adjustable angle scope of transmission light |
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| CN201710017771.5A Pending CN106597727A (en) | 2017-01-11 | 2017-01-11 | Electronic control dimming film with adjustable angle scope of transmission light |
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Cited By (17)
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| CN107085327A (en) * | 2017-06-16 | 2017-08-22 | 北京大学 | A kind of electric-controlled light-regulating film based on liquid crystal and two tropism dyestuffs and preparation method thereof |
| CN109856858A (en) * | 2019-03-18 | 2019-06-07 | 京东方科技集团股份有限公司 | Illuminating module and display screen |
| JP2019101101A (en) * | 2017-11-29 | 2019-06-24 | Ｔｉａｎｍａ Ｊａｐａｎ株式会社 | Beam direction control device and display |
| WO2019136669A1 (en) * | 2018-01-11 | 2019-07-18 | 深圳市前海威斯明科技有限公司 | Peep-proof film, peep-proof display screen, and device for preparing peep-proof film |
| CN110462506A (en) * | 2019-06-20 | 2019-11-15 | 京东方科技集团股份有限公司 | Privacy film, display equipment and the method for showing image in the display device |
| CN110955069A (en) * | 2019-03-19 | 2020-04-03 | 深圳普特爱斯科技有限公司 | Multi-view display peep-proof film and preparation method thereof |
| CN111290056A (en) * | 2020-03-19 | 2020-06-16 | 京东方科技集团股份有限公司 | Peep-proof film, preparation method thereof and display panel |
| CN111880326A (en) * | 2020-08-17 | 2020-11-03 | 京东方科技集团股份有限公司 | Peep-proof display device, preparation method thereof and display device |
| WO2021047015A1 (en) * | 2019-09-12 | 2021-03-18 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN112711152A (en) * | 2020-12-31 | 2021-04-27 | 武汉华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
| CN113009734A (en) * | 2019-12-18 | 2021-06-22 | 乐金显示有限公司 | Privacy film and display device including the same |
| CN113064290A (en) * | 2021-03-25 | 2021-07-02 | 深圳市华星光电半导体显示技术有限公司 | Peep-proof structure, display device and peep-proof method |
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| CN107085327A (en) * | 2017-06-16 | 2017-08-22 | 北京大学 | A kind of electric-controlled light-regulating film based on liquid crystal and two tropism dyestuffs and preparation method thereof |
| JP7083102B2 (en) | 2017-11-29 | 2022-06-10 | Ｔｉａｎｍａ Ｊａｐａｎ株式会社 | Ray direction control device and display device |
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| WO2019136669A1 (en) * | 2018-01-11 | 2019-07-18 | 深圳市前海威斯明科技有限公司 | Peep-proof film, peep-proof display screen, and device for preparing peep-proof film |
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| CN110955069B (en) * | 2019-03-19 | 2024-03-22 | 深圳菲尔泰光电有限公司 | Multi-view display peep-proof film and preparation method thereof |
| CN110955069A (en) * | 2019-03-19 | 2020-04-03 | 深圳普特爱斯科技有限公司 | Multi-view display peep-proof film and preparation method thereof |
| US11599004B2 (en) | 2019-06-20 | 2023-03-07 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Privacy film, display apparatus, and method of displaying image in display apparatus |
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