CN102968973A - Voltage driving mode for polymer dispersed liquid crystal smart film - Google Patents
Voltage driving mode for polymer dispersed liquid crystal smart film Download PDFInfo
- Publication number
- CN102968973A CN102968973A CN2012105251492A CN201210525149A CN102968973A CN 102968973 A CN102968973 A CN 102968973A CN 2012105251492 A CN2012105251492 A CN 2012105251492A CN 201210525149 A CN201210525149 A CN 201210525149A CN 102968973 A CN102968973 A CN 102968973A
- Authority
- CN
- China
- Prior art keywords
- voltage
- liquid crystal
- wave
- polymer dispersed
- dispersed liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The invention discloses a voltage driving mode for a polymer dispersed liquid crystal smart film, and belongs to the technical field of electronic control of instruments and meters. The polymer dispersed liquid crystal smart film is a composite film formed by polymer and liquid crystal. The voltage driving mode for the polymer dispersed liquid crystal smart film, provided by the invention, is characterized in that the voltage value is varied along with the time; the voltage waveform includes but is not limited to rectangular wave, triangular wave, quadrate wave, pulse wave, sine wave, cosine wave, and any other non-direct-current wave. The light transmittance of the polymer dispersed liquid crystal smart film is periodically varied along with the time under such voltage driving mode; and once the frequency of the driving voltage is more than 20Hz, the effect for people is the effect under the maximum light transmittance according to the characteristic of the time frequency of human vision and the photostimulation respect to the middle luminance. When in use, the polymer dispersed liquid crystal smart film can be used for greatly saving the electricity, and also effectively prolonging the service life.
Description
One, technical field
The present invention relates to a kind of voltage drive pattern of Polymer Dispersed Liquid Crystal dimming film, belong to instrument and meter electron controls technology field.
Two, background technology
The Polymer Dispersed Liquid Crystal dimming film is a kind of composite film material that is comprised of polymkeric substance and liquid crystal.Under the effect of DC voltage, the transmittance of Polymer Dispersed Liquid Crystal dimming film changes with institute's making alive, is commonly used to make the adjustable glass partition of transmittance, automotive window, optical device, electron device etc.Up to the present, thus usually adopting the DC voltage pattern to drive the Polymer Dispersed Liquid Crystal dimming film changes the transmittance of this film.Yet the power consumption of direct drive pattern is many, and shortens easily the serviceable life of Polymer Dispersed Liquid Crystal dimming film.The invention provides another kind of voltage drive pattern, its magnitude of voltage time to time change, this voltage waveform include but not limited to square wave, triangular wave, square wave, pulsating wave, sine wave, cosine wave (CW) and other any non-direct current ripple.Based on the temporal frequency characteristic of people's vision, for the light stimulus of intermediate light, the retentivity time of eye is about 0.05 to 0.2 second.So, when the frequency of driving voltage during greater than the 5-20 hertz, the transparent effect the when effect that human eye is seen is exactly the transmissivity maximal value.Under this voltage drive pattern drove, the transmittance of Polymer Dispersed Liquid Crystal dimming film became with institute's making alive.This Polymer Dispersed Liquid Crystal dimming film power and energy saving in large quantities not only during work can also increase serviceable life of Polymer Dispersed Liquid Crystal dimming film.The degree of its power and energy saving depends on the dutycycle of drive voltage signal, consumes electric energy and can reach one of percentage of institute's consuming electric power under the direct voltage drive pattern.
Three, summary of the invention
The present invention is characterized in that for the Polymer Dispersed Liquid Crystal dimming film provides a kind of voltage drive pattern: the waveform that is added to the voltage on the Polymer Dispersed Liquid Crystal dimming film has the characteristic of square wave, triangular wave, square wave, pulsating wave, sine wave, cosine wave (CW) and other any non-direct current ripple.
Polymer Dispersed Liquid Crystal dimming film described in the present invention, its feature is as follows:
1) it is a kind of composite film material, and its component includes but not limited to polymkeric substance and liquid crystal;
2) its liquid crystal quality accounts for the number percent of composite film material quality between 1.0 to 98.0;
3) under the effect of voltage, the transmittance of Polymer Dispersed Liquid Crystal dimming film changes with institute's making alive.
Sine wave described in the present invention, cosine wave (CW), triangle wave voltage drive pattern, its feature is as follows:
1) frequency of its voltage is between 0.001 to 9000 KHz;
2) amplitude of its voltage is between 0.1 to 900 volt.
Square wave described in the present invention, square-wave voltage drive pattern, its feature is as follows:
1) semiperiod of its voltage is between 1 microsecond to 1000 second;
2) amplitude of its voltage is between 0.1 to 700 volt.
Pulsating wave voltage drive pattern described in the present invention, its feature is as follows:
1) its voltage rises to the peaked time between 1 microsecond to 1000 second from minimum value;
2) its voltage time of dropping to minimum value from maximal value is between 1 microsecond to 1000 second;
3) maximal value of its voltage is between 0.1 to 1000 volt.
Any non-direct current wave voltage drive pattern of described in the present invention other is characterized in that its voltage changes in time.
Polymer Dispersed Liquid Crystal dimming film described in the present invention under described voltage drives, is characterized in that:
1) its transmittance changes with institute's making alive;
2) its maximum transmission rate is between 30-99%;
3) its minimum transmittance is between 0.1-29%.
Polymer Dispersed Liquid Crystal dimming film described in the present invention, under described voltage drove, its feature work temperature was between subzero 50 to 120 degrees centigrade Celsius above freezing.
Voltage described in the present invention is the up and down electric potential difference between two surfaces of Polymer Dispersed Liquid Crystal dimming film.
Four, description of drawings
Fig. 1 is a kind of square-wave voltage drive pattern of the present invention, and its semiperiod is 2 seconds, and P-to-P voltage is 9.8 volts.
Fig. 2 is a kind of square-wave voltage drive pattern of the present invention, and its semiperiod is 0.2 second, and P-to-P voltage is 11.6 volts.
Fig. 3 is a kind of saw shape wave voltage drive pattern of the present invention, and its semiperiod is 0.1 second, and P-to-P voltage is 13 volts.
Fig. 4 is a kind of triangle wave voltage drive pattern of the present invention, and its semiperiod is 0.1 second, and P-to-P voltage is 16 volts.
Fig. 5 is Polymer Dispersed Liquid Crystal dimming film time dependent graph of a relation of its transmissivity under a kind of square-wave voltage drive pattern, and its semiperiod is 1 second, and P-to-P voltage is 35 volts.
Five, embodiment
Embodiment 1:
In the present embodiment take the Polymer Dispersed Liquid Crystal dimming film as tested object, as an example of two kinds of square-wave voltage drive patterns example explaination Polymer Dispersed Liquid Crystal dimming film its transmissivity is over time under non-direct voltage drive.
Select a slice Polymer Dispersed Liquid Crystal dimming film, its thickness is 50 microns, and length and width respectively are 10 centimetres, is coated with respectively transparent indium tin oxide conductive layer in the upper and lower surface of this film.Select two wires, an end of a wire wherein is welded on the conductive layer of Polymer Dispersed Liquid Crystal dimming film upper surface, an end of another root wire is welded on the conductive layer of Polymer Dispersed Liquid Crystal dimming film lower surface.Remaining other two sections of these two wires are connected with the output terminal of signal generator respectively.The square-wave voltage signal loading of automatic signal generator is to the Polymer Dispersed Liquid Crystal dimming film in the future.This square-wave voltage signal as shown in Figure 1.The semiperiod of this square-wave voltage signal is 2 seconds as seen from Figure 1, and P-to-P voltage is 9.8 volts.Significantly strong and weak the variation occurs in the transmitted intensity that has naked eyes can observe the Polymer Dispersed Liquid Crystal dimming film, and its strong and weak cycle that changes is consistent with the cycle of impressed voltage signal.
When semiperiod of square-wave voltage signal will be for 0.2 second, significantly strong and weak the variation also can occur in the transmitted intensity of Polymer Dispersed Liquid Crystal dimming film.Fig. 2 is a kind of square-wave voltage drive pattern of the present invention, and its semiperiod is 0.2 second, and P-to-P voltage is 11.6 volts.The square-wave voltage signal loading of automatic signal generator is to the Polymer Dispersed Liquid Crystal dimming film in the future, with the transmittance of ultraviolet-visual spectrometer as the above-mentioned Polymer Dispersed Liquid Crystal dimming film of tester analytic record, test wavelength fixes on 600 nanometers, found that the transmitted intensity of Polymer Dispersed Liquid Crystal dimming film with impressed voltage and time obvious variation occurs.
Embodiment 2:
In the present embodiment take the Polymer Dispersed Liquid Crystal dimming film as tested object, as an example of a kind of saw shape wave voltage drive pattern and a kind of triangle wave voltage drive pattern example explaination Polymer Dispersed Liquid Crystal dimming film its transmissivity is over time under non-direct voltage drive.
Select a slice Polymer Dispersed Liquid Crystal dimming film, its thickness is 20 microns, and length and width respectively are 50 centimetres, is coated with respectively transparent indium tin oxide conductive layer in the upper and lower surface of this film.Select two wires, an end of a wire wherein is welded on the conductive layer of Polymer Dispersed Liquid Crystal dimming film upper surface, an end of another root wire is welded on the conductive layer of Polymer Dispersed Liquid Crystal dimming film lower surface.Remaining other two sections of these two wires are connected with the output terminal of signal generator respectively.The saw shape wave voltage signal of automatic signal generator or triangle wave voltage signal loading are to the Polymer Dispersed Liquid Crystal dimming film in the future.Fig. 3 is a kind of saw shape wave voltage drive pattern of the present invention, and its semiperiod is 0.1 second, and P-to-P voltage is 13 volts.Fig. 4 is a kind of triangle wave voltage drive pattern of the present invention, and its semiperiod is 0.1 second, and P-to-P voltage is 16 volts.For these two kinds of voltage drive patterns.The difficult variation with observing the transmitted intensity of Polymer Dispersed Liquid Crystal dimming film of naked eyes, but with the transmittance of ultraviolet-visual spectrometer as the above-mentioned Polymer Dispersed Liquid Crystal dimming film of tester analytic record, obvious variation occurs with impressed voltage and time in the transmitted intensity that found that the Polymer Dispersed Liquid Crystal dimming film, and its strong and weak cycle that changes is consistent with the cycle of impressed voltage signal.
Embodiment 3:
In the present embodiment take the Polymer Dispersed Liquid Crystal dimming film as tested object, as an example of a kind of square-wave voltage drive pattern example explaination Polymer Dispersed Liquid Crystal dimming film its transmissivity is over time under non-direct voltage drive.
Select a slice Polymer Dispersed Liquid Crystal dimming film, its thickness is 30 microns, and length and width respectively are 150 centimetres, is coated with respectively transparent indium tin oxide conductive layer in the upper and lower surface of this film.Select two wires, an end of a wire wherein is welded on the conductive layer of Polymer Dispersed Liquid Crystal dimming film upper surface, an end of another root wire is welded on the conductive layer of Polymer Dispersed Liquid Crystal dimming film lower surface.Remaining other two sections of these two wires are connected with the output terminal of signal generator respectively.The square-wave voltage signal loading of automatic signal generator is to the Polymer Dispersed Liquid Crystal dimming film in the future.The semiperiod of this square-wave voltage signal is 1 second, and P-to-P voltage is 35 volts.Significantly strong and weak the variation occurs in the transmitted intensity that has naked eyes can observe the Polymer Dispersed Liquid Crystal dimming film.With the transmittance of ultraviolet-visual spectrometer as the above-mentioned Polymer Dispersed Liquid Crystal dimming film of tester analytic record, the result as shown in Figure 5.Fig. 5 is Polymer Dispersed Liquid Crystal dimming film time dependent graph of a relation of its transmissivity under a kind of square-wave voltage drive pattern, and its semiperiod is 1 second, and P-to-P voltage is 35 volts.As seen from Figure 5, obvious variation occurs with impressed voltage and time in the transmitted intensity of Polymer Dispersed Liquid Crystal dimming film, and its minimum light transmission rate is about 75%, and its high transmission rate is about 95%.Based on the temporal frequency characteristic of people's vision, for the light stimulus of intermediate light, the retentivity time of eye is about 0.05 to 0.2 second, it is generally acknowledged that it is exactly continuous surpassing 12-16 frame per second.So, when the frequency of driving voltage during greater than the 5-20 hertz, the transparent effect when human eye is just seen the transmissivity maximal value.With the Polymer Dispersed Liquid Crystal dimming film of this invention manufacturing, power and energy saving in large quantities not only can also increase serviceable life of Polymer Dispersed Liquid Crystal dimming film.The degree of power and energy saving depends on the dutycycle of drive voltage signal, consumes electric energy and can reach one of percentage of institute's consuming electric power under the direct voltage drive pattern.
Claims (9)
1. a kind of voltage drive pattern of Polymer Dispersed Liquid Crystal dimming film, it is characterized in that: its waveform of voltage that is added on the Polymer Dispersed Liquid Crystal dimming film has the characteristic of square wave, triangular wave, square wave, pulsating wave, sine wave, cosine wave (CW) or other any non-direct current ripple.
2. Polymer Dispersed Liquid Crystal dimming film as claimed in claim 1, its feature is as follows:
1) it is a kind of composite film material, and its component includes but not limited to polymkeric substance and liquid crystal;
2) its liquid crystal quality accounts for the number percent of composite film material quality between 1.0 to 98.0;
3) under the effect of voltage, the transmittance of Polymer Dispersed Liquid Crystal dimming film changes with institute's making alive.
3. sine wave as claimed in claim 1, cosine wave (CW), triangle wave voltage drive pattern, its feature is as follows:
1) frequency of its voltage is between 0.001 to 9000 KHz;
2) amplitude of its voltage is between 0.1 to 900 volt.
4. square wave as claimed in claim 1, square-wave voltage drive pattern, its feature is as follows:
1) semiperiod of its voltage is between 1 microsecond to 1000 second;
2) amplitude of its voltage is between 0.1 to 700 volt.
5. pulsating wave voltage drive pattern as claimed in claim 1, its feature is as follows:
1) its voltage rises to the peaked time between 1 microsecond to 1000 second from minimum value;
2) its voltage time of dropping to minimum value from maximal value is between 1 microsecond to 1000 second;
3) maximal value of its voltage is between 0.1 to 1000 volt.
6. other any non-direct current wave voltage drive pattern as claimed in claim 1 is characterized in that its voltage changes in time.
7. such as claim 1 and 2 described Polymer Dispersed Liquid Crystal dimming films, under described voltage drives such as claim 3-6, it is characterized in that:
A) its transmittance changes with institute's making alive;
B) its maximum transmission rate is between 30-99%;
C) its maximum transmission rate is between 0.1-29%.
8. such as claim 1,2 and 7 described Polymer Dispersed Liquid Crystal dimming films, under described voltage drove such as claim 3-6, its feature work temperature was between subzero 50 to 120 degrees centigrade Celsius above freezing.
9. be the up and down electric potential difference between two surfaces of Polymer Dispersed Liquid Crystal dimming film such as the described voltage of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105251492A CN102968973A (en) | 2012-12-10 | 2012-12-10 | Voltage driving mode for polymer dispersed liquid crystal smart film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105251492A CN102968973A (en) | 2012-12-10 | 2012-12-10 | Voltage driving mode for polymer dispersed liquid crystal smart film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102968973A true CN102968973A (en) | 2013-03-13 |
Family
ID=47799082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105251492A Pending CN102968973A (en) | 2012-12-10 | 2012-12-10 | Voltage driving mode for polymer dispersed liquid crystal smart film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102968973A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793378A (en) * | 2014-01-17 | 2015-07-22 | 北京众智同辉科技股份有限公司 | Driving method for polymer-dispersed liquid crystal membrane |
| CN105204215A (en) * | 2015-09-16 | 2015-12-30 | 上海玮舟微电子科技有限公司 | Multi-path power control system and method for PDLC (Polymer Dispersed Liquid Crystal) dimming films |
| JP2020144303A (en) * | 2019-03-08 | 2020-09-10 | 日東電工株式会社 | Polymer-dispersed liquid crystal device and method of driving polymer-dispersed liquid crystal panel |
| JP2020528570A (en) * | 2017-07-12 | 2020-09-24 | サン−ゴバン グラス フランス | A device for operating functional elements with electrically controllable optical properties |
| JP2021001929A (en) * | 2019-06-20 | 2021-01-07 | 凸版印刷株式会社 | Light control sheet driving device, light control apparatus, driving method of light control sheet and driving program of light control sheet |
| CN115061307A (en) * | 2022-06-23 | 2022-09-16 | 珠海兴业新材料科技有限公司 | Low-halation electric control dimming film and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0625720A1 (en) * | 1992-11-13 | 1994-11-23 | Nippon Hoso Kyokai | Liquid crystal element and its driving method, liquid crystal apparatus and illuminating apparatus |
| US20070195033A1 (en) * | 2006-02-20 | 2007-08-23 | Fujifilm Corporation | Driving method for liquid crystal light modulating device |
| CN101395965A (en) * | 2006-02-10 | 2009-03-25 | 佩利康有限公司 | Drive circuits for capacitive loads |
| CN102081910A (en) * | 2009-11-27 | 2011-06-01 | 北京众智同辉科技有限公司 | Method and circuit for driving polymer dispersed liquid crystal (PDLC) films |
-
2012
- 2012-12-10 CN CN2012105251492A patent/CN102968973A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0625720A1 (en) * | 1992-11-13 | 1994-11-23 | Nippon Hoso Kyokai | Liquid crystal element and its driving method, liquid crystal apparatus and illuminating apparatus |
| CN101395965A (en) * | 2006-02-10 | 2009-03-25 | 佩利康有限公司 | Drive circuits for capacitive loads |
| US20070195033A1 (en) * | 2006-02-20 | 2007-08-23 | Fujifilm Corporation | Driving method for liquid crystal light modulating device |
| CN102081910A (en) * | 2009-11-27 | 2011-06-01 | 北京众智同辉科技有限公司 | Method and circuit for driving polymer dispersed liquid crystal (PDLC) films |
Non-Patent Citations (1)
| Title |
|---|
| 黄爱琴，郑继红，蒋妍梦，唐平玉，周增军，王艇艇，庄松林: "电控全息聚合物分散液晶斩光器的设计与研究", 《光学技术》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793378A (en) * | 2014-01-17 | 2015-07-22 | 北京众智同辉科技股份有限公司 | Driving method for polymer-dispersed liquid crystal membrane |
| CN105204215A (en) * | 2015-09-16 | 2015-12-30 | 上海玮舟微电子科技有限公司 | Multi-path power control system and method for PDLC (Polymer Dispersed Liquid Crystal) dimming films |
| CN105204215B (en) * | 2015-09-16 | 2019-10-18 | 上海玮舟微电子科技有限公司 | A kind of PDLC light modulation film multiple power supplies control system and method |
| JP2020528570A (en) * | 2017-07-12 | 2020-09-24 | サン−ゴバン グラス フランス | A device for operating functional elements with electrically controllable optical properties |
| JP7104772B2 (en) | 2017-07-12 | 2022-07-21 | サン－ゴバン グラス フランス | A device for operating functional elements with electrically controllable optical properties |
| JP2020144303A (en) * | 2019-03-08 | 2020-09-10 | 日東電工株式会社 | Polymer-dispersed liquid crystal device and method of driving polymer-dispersed liquid crystal panel |
| JP7333701B2 (en) | 2019-03-08 | 2023-08-25 | 日東電工株式会社 | Polymer-dispersed liquid crystal device and method for driving polymer-dispersed liquid crystal panel |
| US11881187B2 (en) | 2019-03-08 | 2024-01-23 | Nitto Denko Corporation | Polymer dispersion type liquid crystal device, and method of driving polymer dispersion type liquid crystal panel |
| JP2021001929A (en) * | 2019-06-20 | 2021-01-07 | 凸版印刷株式会社 | Light control sheet driving device, light control apparatus, driving method of light control sheet and driving program of light control sheet |
| JP7263938B2 (en) | 2019-06-20 | 2023-04-25 | 凸版印刷株式会社 | Light control sheet driving device, light control device, light control sheet driving method, and light control sheet driving program |
| CN115061307A (en) * | 2022-06-23 | 2022-09-16 | 珠海兴业新材料科技有限公司 | Low-halation electric control dimming film and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102968973A (en) | Voltage driving mode for polymer dispersed liquid crystal smart film | |
| CN100422837C (en) | Color electronic paper display device | |
| CN108445661B (en) | System and method for controlling an optical filter assembly | |
| US20110299001A1 (en) | Optical display device and method thereof | |
| CN205176432U (en) | Liquid crystal window | |
| EP2256545A1 (en) | Electrically controlled medium for modulating light | |
| KR20170005436A (en) | Two particle total internal reflection image display | |
| CN101377903B (en) | Method for driving electrophoresis display device, electrophoresis display device, and electronic apparatus | |
| CN110178075A (en) | For detecting the method and switchable optical device of the substrate breakage of switchable optical elements | |
| RU145576U1 (en) | LCD | |
| US20090295765A1 (en) | Electrophoretic device and method for controlling the same | |
| CN101866073B (en) | Driving apparatus for liquid crystal light modulator and variable optical attenuator employing driving apparatus | |
| CN108919586A (en) | Display panel and display device | |
| CN100533210C (en) | Detecting method for LCD device electro-optical characteristic and average slope angle corresponding relationship | |
| EP2538403A2 (en) | Unipolar gray scale drive scheme for cholesteric liquid crystal displays | |
| CN203798540U (en) | Experiment device used for researching photoelectric characteristics of liquid crystal display | |
| CN109477994A (en) | Electrochemical appliance | |
| CN110476111A (en) | Liquid crystal light modulation device and liquid crystal light modulation method | |
| Chen et al. | 23‐1: Distinguished Student Paper: Flexoelectric Effect on Image Flickering of Fringe Field Switching LCDs | |
| He et al. | Dynamically color-changing polymer-dispersed liquid crystals containing ionic liquid for smart window applications | |
| KR102448828B1 (en) | Liquid crystal dimming device and manufacturing method thereof | |
| RU2353939C2 (en) | Method for investigation of object surface relief from electroconductive material coated with layer of dielectric and device for its realisation | |
| CN1327232C (en) | Passive indicator of voltage presence | |
| CN208334830U (en) | LCD suitable for high driving number | |
| CN106154596A (en) | Electro-optical display device, detection devices and methods therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130313 |