CN101852959A - Reflecting type electrochromic liquid crystal display (LCD) - Google Patents
Reflecting type electrochromic liquid crystal display (LCD) Download PDFInfo
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- CN101852959A CN101852959A CN200910130572A CN200910130572A CN101852959A CN 101852959 A CN101852959 A CN 101852959A CN 200910130572 A CN200910130572 A CN 200910130572A CN 200910130572 A CN200910130572 A CN 200910130572A CN 101852959 A CN101852959 A CN 101852959A
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Abstract
The invention discloses a reflecting type electrochromic liquid crystal display (LCD) which comprises a first base plate, a second base plate, a first electrochromic liquid crystal mixture layer, a first electrode layer and a second electrode layer, wherein the second base plate is parallel to the first base plate, and the first electrochromic liquid crystal mixture layer is configured between the first base plate and the second base plate and comprises a plurality of liquid crystal molecules, an optical rotating agent and a macromolecule mixture; the liquid crystal molecules and the optical rotating agent are distributed in a curing structure of the macromolecule mixture; the first electrode layer is configured between the first base plate and the first electrochromic liquid crystal mixture layer, and the second electrode layer is configured between the second base plate and the first electrochromic liquid crystal mixture layer; the first electrochromic liquid crystal mixture layer reflects first reflecting light, and the wavelength of the first reflecting light is changed along with a first electric field between the first electrode layer and the second electrode layer.
Description
Technical field
The invention relates to a kind of LCD, and particularly relevant for a kind of reflective electrochromism LCD.
Background technology
Cholesterol type LCD mostly is to belong to reflective liquid-crystal display, and it mainly all is to utilize the cholesterol liquid crystal material as its reflection horizon.In addition, full-color cholesterin liquid-crystal display technology is disclosed.Common full-color cholesterin liquid-crystal display is to utilize the liquid crystal material layer of stack Red Green Blue to reach full-color purpose at present.Or, with the liquid crystal material layer of Red Green Blue, be disposed at respectively in the middle of the different pixel encapsulating structures, to reach the display effect of full-colorization.
If the mode with the liquid crystal material layer of stack Red Green Blue reaches full-colorization display effect, then the thickness of cholesterol type LCD certainly will can't reduce.On the other hand, if the liquid crystal material layer of Red Green Blue is packaged in the middle of the different pixels respectively, then the reflection efficiency of cholesterol type LCD all can reduce significantly with showing contrast.Therefore, the reflective liquid-crystal display of this type design still has many problems that do not overcome as yet on the display technique of full-colorization.
Summary of the invention
The invention provides a kind of reflecting type electrochromic LCD, under different electric field actions, its electrochromism liquid crystal compound layer can reflect the visible light of different wave length, to reach the colouring (multi-color) or the display effect of full-colorization (full-color).
The present invention proposes a kind of reflecting type electrochromic LCD, and it comprises one first substrate, one second substrate, one first liquid crystal compound layer, one first electrode layer and a second electrode lay.Second substrate is parallel to first substrate, and the first liquid crystal compound layer is disposed between first substrate and second substrate.The first electrochromism liquid crystal compound layer comprises a plurality of liquid crystal molecules, a chiral dope and a macromolecule mixture, and wherein liquid crystal molecule and chiral dope are distributed in the consolidated structures of macromolecule mixture.First electrode layer is disposed between first substrate and the first electrochromism liquid crystal compound layer, and the second electrode lay is disposed between second substrate and the first electrochromism liquid crystal compound layer.The first electrochromism liquid crystal compound layer is suitable for reflecting one first reflected light, and the first catoptrical wavelength is along with one first electric field between first electrode layer and the second electrode lay changes.
In one embodiment of this invention, above-mentioned reflecting type electrochromic LCD more comprises one the 3rd substrate, one second electrochromism liquid crystal compound layer, a third electrode layer and one the 4th electrode layer.The 3rd substrate is disposed at the side of second substrate away from the first electrochromism liquid crystal compound layer.The second electrochromism liquid crystal compound layer is disposed between the 3rd substrate and second substrate.The third electrode layer is disposed between the 3rd substrate and the second electrochromism liquid crystal compound layer.The 4th electrode layer then is disposed between second substrate and the second electrochromism liquid crystal compound layer.The second electrochromism liquid crystal compound layer is suitable for reflecting one second reflected light, and the second catoptrical wavelength is along with one second electric field between third electrode layer and the 4th electrode layer changes.The multiple reflecting type electrochromic LCD that all the other the present invention carried will be specified among the embodiment respectively.
Based on above-mentioned, the present invention is mixed into liquid crystal molecule, chiral dope and macromolecule mixture can not to reflect not homochromy catoptrical electrochromism liquid crystal compound layer under the same electric field.Therefore, reflecting type electrochromic LCD of the present invention does not need the mode with three layers of liquid crystal layer lamination, just can reach the display effect of colouring.That is reflective liquid-crystal display of the present invention can meet the demand of slimming.Certainly, electrochromism LCD of the present invention do not need yet with different dichroic liquid crystal layers be disposed at different pixels in and help to promote the reflection efficiency of reflective liquid-crystal display.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the reflecting type electrochromic LCD into the first embodiment of the present invention.
Fig. 2 illustrates the reflecting type electrochromic LCD into the second embodiment of the present invention.
The main element symbol description:
100,200: the reflecting type electrochromic LCD
110: the first substrates
130: the first electrochromism liquid crystal compounds of 120: the second substrates layer
160: background layer 170,270: separation material
230: the second electrochromism liquid crystal compounds of 210: the three substrates layer
240: 250: the four electrode layer of third electrode layer
L: light R1: first reflected light
R2: second reflected light
Embodiment
Fig. 1 illustrates the reflecting type electrochromic LCD into the first embodiment of the present invention.Please refer to Fig. 1, reflecting type electrochromic LCD 100 comprises one first substrate 110, one second substrate 120, one first electrochromism liquid crystal compound layer 130, one first electrode layer 140 and a second electrode lay 150.Second substrate 120 is parallel to first substrate 110, and the first electrochromism liquid crystal compound layer 130 is disposed between first substrate 110 and second substrate 120.First electrode layer 140 is disposed between first substrate 110 and the first electrochromism liquid crystal compound layer 130, and the second electrode lay 150 is disposed between second substrate 120 and the first electrochromism liquid crystal compound layer 130.The first electrochromism liquid crystal compound layer 130 is suitable for reflecting one first reflected light R1, and the wavelength of the first reflected light R1 is along with one first electric field between first electrode layer 140 and the second electrode lay 150 changes.
The first electrochromism liquid crystal compound layer 130 comprises a plurality of liquid crystal molecules, a chiral dope and a macromolecule mixture, and wherein liquid crystal molecule and chiral dope are distributed in the consolidated structures of macromolecule mixture.Liquid crystal molecule in the first electrochromism liquid crystal compound layer 130 generally can be subjected to first effect of electric field and produce reversing, toppling over or phenomenon such as bending.In the present embodiment, except first effect of electric field, the consolidated structures that liquid crystal molecule more is subjected to macromolecule mixture influences.Therefore, when the varying in size of first electric field, the liquid crystal molecule in the first electrochromism liquid crystal compound layer 130 will present different states.
In fact, under the influence of the consolidated structures of first electric field and macromolecule mixture, light L shines the first reflected light R1 that is reflected out behind the first electrochromism liquid crystal compound layer 130 just can have different wavelength, and therefore reflecting type electrochromic LCD 100 also can have the display effect of colouring.In addition, under the first specific electric field, the first electrochromism liquid crystal compound layer 130 also can not reflect the first reflected light R1, mixes thing layer 130 and make light L directly penetrate the first electrochromism liquid crystal.
In the present embodiment, the wavelength variation range of the first reflected light R1 for example is 500nm～750nm, or 500nm～600nm, or 400nm～500nm, or other wavelength coverage.That is the first electrochromism liquid crystal compound layer 130 of present embodiment can reflect the first reflected light R1 of multiple color.When reflected displaying device 100 shows, only need adjust in the zones of different first electric field level between first electrode layer 140 and the second electrode lay 150 and can carry out full-colorization demonstration.What deserves to be mentioned is in zones of different different sizes is arranged with first electric field between the second electrode lay 150 in order to make first electrode layer 140, first electrode layer 140 or the second electrode lay 150 can be pixel electrode arrays.Generally speaking, the reflecting type electrochromic LCD 100 of present embodiment does not need with multilayer liquid crystal material layer lamination, or the plurality of liquid crystals material layer is packaged in respectively in the different pixels, just can reach the display effect of full-colorization.Thus, the reflecting type electrochromic LCD 100 of present embodiment can reduce the use kind of liquid crystal material effectively, and the thickness of reflecting type electrochromic LCD 100 also more reduces.
In addition, the first electrochromism liquid crystal compound layer 130 still can be kept pretty good reflection efficiency.Therefore, reflecting type electrochromic LCD 100 has good display quality.According to practical test result as can be known, reflecting type electrochromic LCD 100 does not need high driving voltage just can in time adjust the wavelength of the first reflected light R1 that the first electrochromism liquid crystal compound layer 130 reflected.That is to say that reflecting type electrochromic LCD 100 need not consumed too much electric energy just can have colorful even full-color display effect.
Particularly, macromolecule mixture is polymerized by an original material (starting material).In one embodiment, original material can comprise a plurality of monomers (monomer), a plurality of oligomerization compound (oligomer) and an initiator (initiator).At this, monomer and oligomerization compound can have monofunctional or multiple functional radical respectively.On the practice, original material comprises that more a wetting agent (wetting agent), shakes flat agent (levelingagent), a rigidizer (Curing agent) or an accelerator (promoter and accelerator) etc.When making reflecting type electrochromic LCD 100, original material, liquid crystal molecule and chiral dope for example are received in earlier between first substrate 110 and second substrate 120.Then, carrying out a curing process makes the original material polymerization and solidify to form a macromolecule mixture.At this, the method for solidifying original material has thermal curing method or photocuring method, and wherein original material is a thermohardening type material or a light-cured type material.
In original material, wetting agent helps to improve the molecule and the intermolecular then character of original material, and the surface tension that changes original material, and therefore, original material can be uniformly distributed in the surface of first substrate 110 or second substrate 120.Shaking flat agent then helps original material to present smooth surface on first substrate 110 or second substrate 120.Rigidizer then is to help to make macromolecule mixture to solidify.Accelerator then is in order to quicken the polymerization rate of original material.
In addition, liquid crystal molecule for example is a plurality of nematic crystals, a plurality of cholesterol liquid crystal, a plurality of optically-active liquid crystal or above-mentioned combination.Chiral dope then for example is the serial chiral dope of cyano group (Cyano), Cholesteryl pelargonate (cholesteryl nonanoate), chirality (nonracemic), spiral giant molecule (macromolecular helicity), azobenzene (azobenzenes) chiral dope, ZLI series (Merck company) chiral dope, two naphthalene (binaphthalene) photo etching, bipolar (bipolar) chiral dope, SPE series chiral dope etc.In the present embodiment, first substrate 110 and second substrate 120 can all be transparency carriers.The material of common transparency carrier have glass, polyethylene terephthalate (polyethylene terephthalate, PET), polyethersulfone (Polyethersulfone, PES), (Polyimide PI) waits material to Polyimide.First electrode layer 140 then is all a transparent conductive material with the material of the second electrode lay 150, and it for example is indium tin oxide, indium-zinc oxide, aluminium zinc oxide, zinc paste or tin oxide etc.
Furthermore, reflecting type electrochromic LCD 100 more comprises a background layer 160, and it is disposed at the side of first substrate 110 away from electrochromism liquid crystal compound layer 130.Background layer 160 for example is a layer of reflective material or a dark material layer.Background layer 160 can the cremasteric reflex effect during for layer of reflective material so that the light L of incident be reflected away more efficiently.That is to say, background layer 160 be provided with the light reflection efficiency that helps improve reflecting type electrochromic LCD 100.Certainly, in order to keep the gap between first substrate 110 and second substrate 120, reflecting type electrochromic LCD 100 can more comprise a plurality of separation materials 170, and it is disposed between first substrate 110 and second substrate 120, and the height of separation material 170 for example is smaller or equal to 50 μ m.
In addition, in order to make the shown color of reflecting type electrochromic LCD 100 even more ideal, reflective liquid-crystal display 100 can more comprise a coloring material (not illustrating).Coloring material (not illustrating) for example is a pigment or a dyestuff that makes an addition in the first electrochromism liquid crystal compound layer 130.For example, in one embodiment, the first reflected light R1 that the first electrochromism liquid crystal compound layer 130 is reflected if be rendered as Chinese red, then can add red coloring material (not illustrating) in the first liquid crystal compound layer 130 in the reflecting type electrochromic LCD 100 when the long wavelength.So, reflecting type electrochromic LCD 100 can correctly show red image, and does not have the phenomenon generation of inclined to one side tangerine.In other words, being added with of coloring material (not illustrating) helps improve the versicolor correctness of reflecting type electrochromic LCD 100 demonstrations.
Fig. 2 illustrates the reflecting type electrochromic LCD into the second embodiment of the present invention.Please refer to Fig. 2, reflecting type electrochromic LCD 200 is to increase one deck second electrochromism liquid crystal mixolimnion 230 on the structural design of reflecting type electrochromic LCD 100.Therefore, the structure of reflecting type electrochromic LCD 200 more comprises one the 3rd substrate 210, one second electrochromism liquid crystal compound layer 230, a third electrode layer 240 and one the 4th electrode layer 250 except the structural design of reflecting type electrochromic LCD 100.
The 3rd substrate 210 is disposed at the side of second substrate 120 away from the first electrochromism liquid crystal compound layer 130.The second electrochromism liquid crystal compound layer 230 is disposed between the 3rd substrate 210 and second substrate 120.Third electrode layer 240 is disposed between the 3rd substrate 210 and the second electrochromism liquid crystal compound layer 230.250 of the 4th electrode layers are disposed between second substrate 120 and the second electrochromism liquid crystal compound layer 230.The second electrochromism liquid crystal compound layer 230 is suitable for reflecting one second reflected light R2, and the wavelength of the second reflected light R2 is along with one second electric field between third electrode layer 240 and the 4th electrode layer 250 changes.
In other words, the second electrochromism liquid crystal compound layer 230 is made of similar material in fact to the first electrochromism liquid crystal mixolimnion 130, therefore when the size of second electric field changed, the second electrochromism liquid crystal compound layer 230 can reflect the second reflected light R2 of different wave length.The wavelength variation range of the second reflected light R2 for example is 500nm～750nm.Certainly, the wavelength variation range of the second reflected light R2 in fact also can be 500nm～600nm, or other wavelength coverage.
What deserves to be mentioned is that the wavelength of the first reflected light R1 and the second reflected light R2 all can modulation, it can present wavelength coverage and be preferably and contain all wavelength of visible light scopes.So, reflecting type electrochromic LCD 200 just can present the display frame of full-colorization, and reflecting type electrochromic LCD 200 the 3rd layer of electrochromism liquid crystal mixolimnion that can not need to arrange in pairs or groups again promptly reaches the display effect of full-colorization.In addition, for the color that reflecting type electrochromic LCD 200 is presented is more saturated, a coloring material can be made an addition among the first electrochromism liquid crystal compound layer 130 or the second electrochromism liquid crystal compound layer, 230 one of them person.As described in first embodiment, coloring material can be a pigment or a dyestuff.
In the present embodiment, the 3rd substrate 210 for example is a transparency carrier.The material of third electrode layer 240 and the 4th electrode layer 250 then is a transparent conductive material.Certainly, reflecting type electrochromic LCD 100 more can comprise a plurality of separation materials 270 that are disposed between the 3rd substrate 210 and second substrate 120.The height of these separation materials 170 and separation material 270 is in fact smaller or equal to 50 μ m.In addition, these separation materials 170 can be sphere gap thing, photoresistance separation material, macromolecule separation material etc. with separation material 270, and its shape can be that arbitrary shape and 170 of each separation materials or each separation material 270 can be connected to each other or separated from one another.
In sum, in the reflecting type electrochromic LCD of the present invention, electrochromism liquid crystal compound layer can reflect the reflected light of different wave length under different electric field actions.Therefore, reflecting type electrochromic LCD of the present invention is only utilized the design of simple layer liquid crystal compound layer, just can carry out colorful display effect.Thus, the thickness of reflecting type electrochromic LCD can reduce effectively, and the material cost of electrochromism liquid crystal material layer and use kind also can reduce effectively.In addition, electrochromism liquid crystal compound layer of the present invention has good reflection efficiency, and makes the reflecting type electrochromic LCD have good display effect.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (15)
1. reflecting type electrochromic LCD comprises:
One first substrate;
One second substrate is parallel to described first substrate;
One first electrochromism liquid crystal compound layer, be disposed between described first substrate and described second substrate, the described first electrochromism liquid crystal compound layer comprises a plurality of liquid crystal molecules, a chiral dope and a macromolecule mixture, and described a plurality of liquid crystal molecules and described chiral dope are distributed in the consolidated structures of described macromolecule mixture;
One first electrode layer is disposed between described first substrate and the described first electrochromism liquid crystal compound layer; And
One the second electrode lay, be disposed between described second substrate and the described first electrochromism liquid crystal compound layer, the wherein said first electrochromism liquid crystal compound layer is suitable for reflecting one first reflected light, and the described first catoptrical wavelength is along with one first electric field between described first electrode layer and the described the second electrode lay changes.
2. reflecting type electrochromic LCD as claimed in claim 1 is characterized in that, the described first catoptrical wavelength variation range is essentially 500nm～750nm.
3. reflecting type electrochromic LCD as claimed in claim 1 is characterized in that, the described first catoptrical wavelength variation range is essentially 500nm～600nm.
4. reflecting type electrochromic LCD as claimed in claim 1 is characterized in that, the described first catoptrical wavelength variation range is essentially 400nm～500nm.
5. reflecting type electrochromic LCD as claimed in claim 1, it is characterized in that, more comprise a background layer, be disposed at the side of described first substrate away from described electrochromism liquid crystal compound layer, wherein said background layer is a layer of reflective material or a dark material layer.
6. reflecting type electrochromic LCD as claimed in claim 1 is characterized in that described macromolecule mixture is polymerized by an original material, and described original material comprises a plurality of monomers, a plurality of oligomerization compound and an initiator.
7. reflecting type electrochromic LCD as claimed in claim 6 is characterized in that, described original material comprises that more a wetting agent, shakes flat agent, a rigidizer, an accelerator.
8. reflecting type electrochromic LCD as claimed in claim 6 is characterized in that, described original material is a thermohardening type material or a light-cured type material.
9. reflecting type electrochromic LCD as claimed in claim 1 is characterized in that, described a plurality of liquid crystal molecules are a plurality of nematic crystals, a plurality of cholesterol liquid crystal, a plurality of optically-active liquid crystal or above-mentioned combination.
10. reflecting type electrochromic LCD as claimed in claim 1, it is characterized in that described chiral dope is cyano group series chiral dope, Cholesteryl pelargonate, chirality, spiral giant molecule, azobenzene optical rotation agent, ZLI series chiral dope, two naphthalene photo etching, bipolar chiral dope or SPE series chiral dope.
11. reflecting type electrochromic LCD as claimed in claim 1 is characterized in that, more comprises:
One the 3rd substrate is disposed at the side of described second substrate away from the described first electrochromism liquid crystal compound layer;
One second electrochromism liquid crystal compound layer is disposed between described the 3rd substrate and described second substrate;
One third electrode layer is disposed between described the 3rd substrate and the described second electrochromism liquid crystal compound layer; And
One the 4th electrode layer, be disposed between described second substrate and the described second electrochromism liquid crystal compound layer, the described second electrochromism liquid crystal compound layer is suitable for reflecting one second reflected light, and the described second catoptrical wavelength is along with one second electric field between described third electrode layer and described the 4th electrode layer changes.
12. reflecting type electrochromic LCD as claimed in claim 11 is characterized in that, the described second catoptrical wavelength variation range is essentially 500nm～750nm.
13. reflecting type electrochromic LCD as claimed in claim 11 is characterized in that, the described second catoptrical wavelength variation range is essentially 500nm～600nm.
14. as claim 1 or 11 described reflecting type electrochromic LCD, it is characterized in that, more comprise a coloring material, make an addition among the described first liquid crystal compound layer or described second one of them person of electrochromism liquid crystal compound layer, wherein said coloring material is a pigment or a dyestuff.
15., it is characterized in that as claim 1 or 11 described reflecting type electrochromic LCD, more comprise a plurality of separation materials, be disposed between described the 3rd substrate and described second substrate, the height of wherein said a plurality of separation materials is smaller or equal to 50 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101305720A CN101852959B (en) | 2009-04-03 | 2009-04-03 | Reflecting type electrochromic liquid crystal display |
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| CN2009101305720A CN101852959B (en) | 2009-04-03 | 2009-04-03 | Reflecting type electrochromic liquid crystal display |
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| CN101852959A true CN101852959A (en) | 2010-10-06 |
| CN101852959B CN101852959B (en) | 2011-09-07 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998870A (en) * | 2011-09-08 | 2013-03-27 | 华德塑料制品有限公司 | Electro-chromic material |
| CN103620490A (en) * | 2011-06-30 | 2014-03-05 | 佛罗里达大学研究基金会有限公司 | Multiple controlled electrochromic devices for visible and IR modulation |
| CN103901651A (en) * | 2012-12-27 | 2014-07-02 | 财团法人工业技术研究院 | Cholesterol liquid crystal display device and manufacturing method thereof |
| CN113514997A (en) * | 2021-07-21 | 2021-10-19 | 蓝思科技（长沙）有限公司 | Electrochromic process and electrochromic device |
| CN113960831A (en) * | 2020-07-21 | 2022-01-21 | 瀚宇彩晶股份有限公司 | Display panel |
| CN113960832A (en) * | 2020-07-21 | 2022-01-21 | 瀚宇彩晶股份有限公司 | Display panel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE178645T1 (en) * | 1991-05-02 | 1999-04-15 | Univ Kent State Ohio | LIQUID CRYSTAL LIGHT MODULATING DEVICE AND MATERIAL |
| CN1327277C (en) * | 2002-08-15 | 2007-07-18 | 温景梧 | Liqiud crystal dimmer and its manufacturing method |
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2009
- 2009-04-03 CN CN2009101305720A patent/CN101852959B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620490A (en) * | 2011-06-30 | 2014-03-05 | 佛罗里达大学研究基金会有限公司 | Multiple controlled electrochromic devices for visible and IR modulation |
| CN102998870A (en) * | 2011-09-08 | 2013-03-27 | 华德塑料制品有限公司 | Electro-chromic material |
| CN103901651A (en) * | 2012-12-27 | 2014-07-02 | 财团法人工业技术研究院 | Cholesterol liquid crystal display device and manufacturing method thereof |
| CN103901651B (en) * | 2012-12-27 | 2016-08-24 | 财团法人工业技术研究院 | Cholesterol liquid crystal display device and manufacturing method thereof |
| CN113960831A (en) * | 2020-07-21 | 2022-01-21 | 瀚宇彩晶股份有限公司 | Display panel |
| CN113960832A (en) * | 2020-07-21 | 2022-01-21 | 瀚宇彩晶股份有限公司 | Display panel |
| CN113514997A (en) * | 2021-07-21 | 2021-10-19 | 蓝思科技（长沙）有限公司 | Electrochromic process and electrochromic device |
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| CN101852959B (en) | 2011-09-07 |
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