CN103969876B - Polarized light converter based on blue-phase liquid crystal - Google Patents
Polarized light converter based on blue-phase liquid crystal Download PDFInfo
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- CN103969876B CN103969876B CN201410188026.3A CN201410188026A CN103969876B CN 103969876 B CN103969876 B CN 103969876B CN 201410188026 A CN201410188026 A CN 201410188026A CN 103969876 B CN103969876 B CN 103969876B
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Abstract
The invention discloses a polarized light converter based on a blue-phase liquid crystal. The polarized light converter based on the blue-phase liquid crystal comprises a first coupling prism, a liquid crystal box and a second coupling prism, wherein the first coupling prism, the liquid crystal box and the second coupling prism are glued together through transparent adhesives I and transparent adhesives II. The first coupling prism and the second coupling prism are used for guiding incident light into the liquid crystal box and out of the liquid crystal box. The liquid crystal box comprises an upper substrate, the liquid crystal and a lower substrate. The liquid crystal is the blue-phase liquid crystal. A first transparent electrode and a second transparent electrode are formed on the upper substrate and the lower substrate respectively so that voltage can be applied to the liquid crystal. Even electric fields are distributed between the first transparent electrode and the second transparent electrode. The blue-phase liquid crystal is adopted to achieve high-speed response, the even electric fields are distributed between the two transparent electrodes, the polarized light converter has the good uniformity, and meanwhile as the two coupling prisms are adopted to guide the incident light into the liquid crystal box and out of the liquid crystal box, the performance of the whole polarized light converter is improved.
Description
Technical field
The present invention relates to stereo projection technology field, specifically a kind of Polarization converter based on blue phase liquid crystal.
Background technology
Existing stereo projection technology generally adopts dual-projection machine system, and polarization direction is installed additional not respectively in Liang Tai projector
Same polarizer, then right and left eyes image is projected simultaneously on one screen, the image that two width overlap is presented on screen, sees
Crowd watches stereo-picture by user wearing polarized glasses.The Liang Tai projector of dual-projection machine system needs exactitude position, calibration process
Extremely complex, and the cost of Liang Tai projector is very high, is served only for major film institute, and average family is difficult to bear, and is unfavorable for
Popularization and application.Then, there has been proposed single projector stereo projection system, this system includes a projector and a polarised light
Converter, wherein Polarization converter are used for controlling the polarization state of right and left eyes image.By time-multiplexed method, projector will
On screen, spectators may be viewed by stereo-picture by user wearing polarized glasses to right and left eyes image alternating projection.Single projector is three-dimensional
, without the concern for the alignment issues of Liang Tai projector projected image, structure is simple, low cost for optical projection system.But, this system is adopted
The refreshing frequency using time-multiplexed method, display panels and Polarization converter is all changed into original twice, and this will
Ask liquid crystal material to have a characteristic of high-speed response, and the response speed of common nematic liquid crystal in 10ms about it is difficult to meet will
Ask.
The response time of blue phase liquid crystal, in musec order, can be used as the liquid crystal device of high-speed response, and does not need to be orientated
Layer, manufacturing process is simple.Therefore, blue phase liquid crystal can be used to realize the Polarization converter of high-speed response.As a rule, polarize
Photoconverter requires whole device to have good uniformity, so that the polarization state of incident light is changed consistent.Blue phase liquid crystal device at present
Part mainly adopts transfer electron structure in face to drive, and controls the polarization state of incident light using the transverse electric field producing between electrode.
However, in face transfer electron produce non-uniform electric, uneven electric field can cause incident light polarization state change not
Unanimously, thus the uniformity of polarisation-affecting photoconverter, reduce the performance of whole device.
Content of the invention
The present invention makes to solve the above problems, its purpose is to provide a kind of high-speed response, have good
The Polarization converter based on blue phase liquid crystal of good uniformity.
In order to achieve the above object, the present invention proposes a kind of Polarization converter based on blue phase liquid crystal, including：First
Couple prism, liquid crystal cell and the second couple prism；Described the first couple prism, the second couple prism and liquid crystal cell are used thoroughly respectively
Gelatin stickAnd transparent adhesiveGlued together；The first described couple prism and the second couple prism are used for incidence
Light imports and derives liquid crystal cell；Described liquid crystal cell includes upper substrate, liquid crystal and infrabasal plate；Described liquid crystal is filled in upper substrate
And infrabasal plate between；Described liquid crystal adopts blue phase liquid crystal；It is respectively formed with first transparent on described upper substrate and infrabasal plate
Electrode and second transparency electrode are so as to described liquid crystal applied voltages；Described first transparency electrode and second transparency electrode it
Between produce uniform Electric Field Distribution；The birefringence of described liquid crystal is by described first transparency electrode and second transparency electrode
Applied voltage is changed.
Preferably, the substrate normal of described liquid crystal cell and the angle of incident light are θ, and 10 °≤θ≤80 °.
Preferably, the first described couple prism and the second couple prism adopt isotropic transparent material, such as glass
Glass etc..
Preferably, the first described couple prism and the second couple prism are two right-angle prisms, and its base angle is also θ, and
10°≤θ≤80°.
Preferably, described transparent adhesiveAnd transparent adhesiveThe optical cements such as canada balsam can be adopted.
Preferably, described first transparency electrode and second transparency electrode adopt tin indium oxide（ITO）Or indium zinc oxide
（IZO）The electrode made Deng transparent conductive material.
The present invention provide high-speed response is realized using blue phase liquid crystal based on the Polarization converter of blue phase liquid crystal, by
Produce uniform Electric Field Distribution between two transparency electrodes, make device have good uniformity, adopt two coupling ribs simultaneously
Incident light is imported and derives liquid crystal cell by mirror, improves the performance of whole device.
Brief description
Fig. 1 is the structural representation of the Polarization converter based on blue phase liquid crystal.
Fig. 2 (a) is Polarization converter based on the blue phase liquid crystal explanatory diagram in not applied voltage.
Fig. 2 (b) is Polarization converter based on blue phase liquid crystal in applied voltage V=VmWhen explanatory diagram.
Shown by reference numeral in above-mentioned each accompanying drawing is：
10 liquid crystal cells, 11 upper substrates, 15 infrabasal plates, 12 first transparency electrodes, 14 second transparency electrodes, 13 liquid crystal, 16 electricity
Pressure control parts, 21 first couple prisms, 22 second couple prisms, 23 transparent adhesives, 24 transparent adhesives.
Specific embodiment
For enabling those skilled in the art to be further understood that the present invention, explain this below in conjunction with accompanying drawing
Bright specific embodiment.It should be noted that accompanying drawing is only for the purpose of description, and not according to original size mapping.
As shown in figure 1, a kind of Polarization converter based on blue phase liquid crystal of embodiments of the invention, including the first coupling rib
Mirror 21, liquid crystal cell 10, the second couple prism 22；First couple prism 21, the second couple prism 22 and liquid crystal cell 10 are used thoroughly respectively
Gelatin stick23 and transparent adhesive24 is glued together；Liquid crystal cell 10 includes upper substrate 11, liquid crystal 13 and infrabasal plate
15；First transparency electrode 12 and second transparency electrode 14 are formed on upper substrate 11 and infrabasal plate 15, liquid crystal 13 is filled in respectively
Between upper substrate 11 and infrabasal plate 15.
First couple prism 21 and the second couple prism 22 adopt isotropic transparent material, such as glass etc..Liquid crystal
13 adopt blue phase liquid crystal, and blue phase liquid crystal material has the response time of musec order, thus enabling high-speed response.First is transparent
Electrode 12 and second transparency electrode 14 adopt tin indium oxide（ITO）Or indium zinc oxide（IZO）The electricity made Deng transparent conductive material
Pole.Transparent adhesive23 and transparent adhesive24 can adopt the optical cements such as canada balsam.
As a rule, liquid crystal cell utilizes the birefringence of liquid crystal to control the polarization state of incident light.In order that whole device has
Good uniformity, needs to form uniform electric field in liquid crystal layer.In the present embodiment, voltage controlling components 16 pass through first
Transparency electrode 12 and second transparency electrode 14 applied voltage V are on liquid crystal 13, uniform using produce between two transparency electrodes
The birefringence of electric field controls liquid crystal 13, thus control the polarization state of incident light.
However, in liquid crystal cell 10, because direction of an electric field is perpendicular to substrate, so the optical axis direction of liquid crystal 13 is also perpendicularly to
Substrate.For the incident light along substrate normal direction, liquid crystal 13 does not have birefringence, thus liquid crystal cell 10 can not be adjusted
System is from the incident light in substrate normal direction.Therefore, in the present embodiment, substrate normal and the Z axis angle of liquid crystal cell 10 are set
For θ, and incident light is incident along Z-direction.Because the substrate normal of liquid crystal cell 10 and the angle of incident light are θ, liquid crystal 13 has
There is birefringence, so liquid crystal cell 10 can modulate incident light.In order that the light from substrate incline direction preferably passes through
Liquid crystal cell 10, adopts two couple prisms to import the incident light of incline direction and derive liquid crystal layer here.First couple prism
21 and second couple prism 22 be two right-angle prisms, its base angle also be θ.
The voltage responsive of the Polarization converter based on blue phase liquid crystal of the explanation embodiment of the present invention below.Fig. 2 (a) and
Fig. 2 (b) is Polarization converter not applied voltage and applied voltage V=V based on blue phase liquid crystal respectivelymWhen explanatory diagram.?
In the present embodiment, incident light is incident along Z-direction, and incident light is linearly polarized light, its polarization direction and X-axis angle at 45 °.
As shown in Fig. 2 (a), when the Polarization converter not applied voltage based on blue phase liquid crystal, liquid crystal 13 optically isotropism, no
Change the polarization direction of incident light, after liquid crystal layer, polarization direction maintains the original state incident light.As shown in Fig. 2 (b), when to base
Polarization converter applied voltage V=V in blue phase liquid crystalm(>0) when, liquid crystal 13 has birefringence, is equivalent to λ/2 wave plate, enters
Penetrate light after liquid crystal layer, polarization direction rotates 90 °, its polarization direction and X-axis angle are changed into 135 °.By by applied voltage
It is switched to V from 0mOr from VmIt is switched to 0, realize the control to incident light polarization direction.
In the present embodiment, high-speed response is realized using blue phase liquid crystal based on the Polarization converter of blue phase liquid crystal, pass through
Produce uniform Electric Field Distribution between two transparency electrodes, make device have good uniformity, adopt two couplings simultaneously
Incident light is imported and derives liquid crystal layer by prism, improves the performance of whole device.
The foregoing is only the preferred embodiments of the present invention, but the invention is not restricted to this embodiment.The common skill of this area
Art personnel should be appreciated that in the case of without departing from the spirit and scope of the present invention being defined by the claims to its shape
The various changes that formula and details are made, all should belong in the scope of the present invention.
Claims (1)
1. a kind of Polarization converter based on blue phase liquid crystal is it is characterised in that include：First couple prism, liquid crystal cell and
Two couple prisms；
Described the first couple prism, the second couple prism and liquid crystal cell use transparent adhesive I and transparent adhesive II glue respectively
It is combined；
The first described couple prism and the second couple prism are used for importing incident light and derive liquid crystal cell；
Described liquid crystal cell includes upper substrate, liquid crystal and infrabasal plate；
Described liquid crystal is filled between upper substrate and infrabasal plate；
Described liquid crystal adopts blue phase liquid crystal；
First transparency electrode and second transparency electrode are respectively formed with described upper substrate and infrabasal plate so as to described liquid
Brilliant applied voltage；
Uniform Electric Field Distribution is produced between described first transparency electrode and second transparency electrode；
The birefringence of described liquid crystal is by being changed to described first transparency electrode and second transparency electrode applied voltage；
The substrate normal of described liquid crystal cell and the angle of incident light are θ, and 10 °≤θ≤80 °；
The first described couple prism and the second couple prism are two right-angle prisms, and its base angle is also θ, and 10 °≤θ≤80 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410188026.3A CN103969876B (en) | 2014-05-07 | 2014-05-07 | Polarized light converter based on blue-phase liquid crystal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188026.3A CN103969876B (en) | 2014-05-07 | 2014-05-07 | Polarized light converter based on blue-phase liquid crystal |
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| Publication Number | Publication Date |
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| CN103969876A CN103969876A (en) | 2014-08-06 |
| CN103969876B true CN103969876B (en) | 2017-02-15 |
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| CN201410188026.3A Active CN103969876B (en) | 2014-05-07 | 2014-05-07 | Polarized light converter based on blue-phase liquid crystal |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249448A (en) * | 2016-08-11 | 2016-12-21 | 四川大学 | A kind of blue phase liquid crystal lens |
| JP6719763B2 (en) * | 2017-06-27 | 2020-07-08 | 国立研究開発法人産業技術総合研究所 | High speed optical switching engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1839279A (en) * | 2003-07-25 | 2006-09-27 | Az电子材料日本株式会社 | Surface light source device |
| CN102789102A (en) * | 2012-07-27 | 2012-11-21 | 京东方科技集团股份有限公司 | Blue-phase liquid crystal panel and blue-phase LCD device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000235109A (en) * | 1999-02-12 | 2000-08-29 | Victor Co Of Japan Ltd | Color filter substrate |
| US8629968B2 (en) * | 2011-07-13 | 2014-01-14 | Kyungpook National University Industry-Academic Cooperation | Liquid crystal display device |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1839279A (en) * | 2003-07-25 | 2006-09-27 | Az电子材料日本株式会社 | Surface light source device |
| CN102789102A (en) * | 2012-07-27 | 2012-11-21 | 京东方科技集团股份有限公司 | Blue-phase liquid crystal panel and blue-phase LCD device |
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