CN1539677A - Rearview mirror with light being adjusted by liquid crystal display automatically - Google Patents
Rearview mirror with light being adjusted by liquid crystal display automatically Download PDFInfo
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- CN1539677A CN1539677A CNA2003101022118A CN200310102211A CN1539677A CN 1539677 A CN1539677 A CN 1539677A CN A2003101022118 A CNA2003101022118 A CN A2003101022118A CN 200310102211 A CN200310102211 A CN 200310102211A CN 1539677 A CN1539677 A CN 1539677A
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Abstract
A CL-type rear view mirror able to automatically regulate light is composed of LCD, photosensitive device, power supply and casing. Its advantages are low drive voltage, high response speed to electric field, wide visional angle and high contrast.
Description
Technical field
The present invention relates to the LCD Technology field, relate to a kind of liquid crystal back mirror with an automatic light meter specifically.
Background technology
The auto-industry in modern age, each parts is all along with the progressive of science and technology brought in constant renewal in, but the back mirror of automobile and side view mirror but still use general mirror material, chaufeur watches the reproduced image resolution of mirror obviously to be subjected to the influence of rear light intensity, daytime is more clear, when night, there was strong illumination at the rear, reflection through back mirror, light can stimulate the eyes of chaufeur, make the people feel dazzling, influence driving sight line, traffic accident takes place easily, in order to address this problem, the scientists of this area has been carried out many researchs, also obtained very big progress, as developed electric look mirror, it belongs to electrochemistry and shows, places one deck electric material in mirror and glassy layer, and mirror borrows electrochemical process to be controlled to the reflection of light ability, just control the optical states of electrochrome, when driving night, by applying voltage the electrochrome optical property in the electric look mirror is changed, weaken back mirror to the reflection of light ability, to reach not dazzling purpose, its shortcoming is that speed of response is very slow, generally needs the 4-6 reaction time of second, can not be used for full size vehicle back mirrors such as truck.And in recent years, progress along with science and technology, utilizing Liquid Crystal Display (LCD) to make back mirror studies, as US Patent U.S.Patent 3,597, the 044 a kind of technology that discloses, be liquid crystal and dyestuff to be clipped in have in nonplanar reflecting plate and the retardation plate, adopt the nematic crystal of positivity dielectric anisotropy, under electric field action, after light can be mapped on nonplanar reflecting plate by liquid crystal and dye coating, light generation scattering presents bright attitude, do not have electric field to exist down, light impassabitity liquid crystal and dye coating present dark attitude.US Patent U.S.Patent 4 in 1987,266,859 disclose and have a kind ofly studied as the material of mirror with nematic crystal and bitintability dyestuff, with chromium and silver-colored surface and double as conductive layer as catadioptre, because liquid crystal directly contacts with metallic reflector with dyestuff, under electric field action, especially under frequent electric field action, easily cause liquid crystal and dyestuff to decompose and influence the life-span.Deutsche Reichspatent GB2 in 1988,205,075 disclosed be that the aluminium film places the outside face of bottom glass as reflecting surface, use silicon nitride dielectric layer, make automobile rearview mirror by liquid crystal and monogenetic dye, because the reflecting horizon is at the outside face of glass, so produce image blurring phenomenon equally.Its liquid crystal display principle of above-described liquid crystal back mirror can be divided into eurymeric liquid crystal back mirror and transoid liquid crystal back mirror two classes.The eurymeric Liquid Crystal Display (LCD) is that positive dielectric anisotropic liquid crystals and bitintability dye mixture are poured in the mirror case.Be dark attitude when no power, become bright attitude after the energising, the advantage of this Light-modulating mirror is simple in structure, and is fast to electric field response speed; Shortcoming is if minute surface wants to remain on bright attitude, power supply must be provided when starting automobile, even by day, back mirror is only made general reflection purposes, also must open electric-control system, as the depleted short circuit of automobile batteries, in the time of can't providing power supply, mirror can only present dark attitude, even can't bring into play the specular reflection effect of general back mirror, very easily has an accident.In addition, the driving voltage height has also reduced the life-span of back mirror.
As everyone knows, the principal element that influences the back mirror optical display properties is structure liquid crystal, dichromatic dye and oriented material and prescription.Being used in oriented materials all on the Liquid Crystal Display (LCD) at present can be divided into along the face arrangement (parallel in itself, 0 ° at inclination angle) or vertical arrangement (vertical, about 90 ° of tilt angles) oriented material, the orientation effect of substrate surface and geometry thereof are the key factors of control liquid crystal molecule tilt angle and orientation, can form the molecule of long-chain at substrate surface, be the prerequisite structure of vertical orientated material.
Use contains the coupling agent of vertical arrangement alkyl chain or fluorocarbon chain, as: lecithin, quaternary ammonium salt and alkyl amine etc. all can make substrate surface obtain vertical orientated processing.As to use lecithin be that vertical orientated property material is done the surface and handled, and is used in the back mirror device, because its ionic structures and wetting ability thereof are destroyed the liquid crystal system easily and made the resistivity decreased of liquid crystal material on every side.Cause the low contrast on photoelectric characteristic, and through obvious reduction of service life after the frequent circuit drives.So such back mirror is not suitable for using on automobile.
Summary of the invention
The objective of the invention is in order to overcome the shortcoming of above-mentioned eurymeric liquid crystal back mirror, provide that a kind of driving voltage is low, fast to electric field response, response time is few, the visual angle is wide, contrast ratio is high, gray scale is adjustable, manufacturing process is simple, transoid liquid crystal back mirror with an automatic light meter applied widely.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of liquid crystal back mirror with an automatic light meter, by Liquid Crystal Display (LCD), photosensor, power supply and housing link span constitute, its Liquid Crystal Display (LCD) is fixed in the housing link span, be placed on power supply connection Liquid Crystal Display (LCD) on the housing link span, its characteristics are: Liquid Crystal Display (LCD) is overlaped by transparent flat glass board A and transparent flat glass board B plane, interval insulant-beaded glass with 3 μ～20 μ separates therebetween, bind with edge sealing adhesive all around, form liquid crystal cell, wherein at inside face deposition one deck ITO of transparent flat glass board A transparency conducting layer, on transparency conducting layer, scribble one deck polyimide insulative layer, scribble the oriented layer that a strata methyl alkyl siloxane base acid imide/diethanolamine (DEA) titanium chelate material constitutes on the insulating barrier, on the inside face of transparent flat glass board B, depositing argentum reflecting layer, and on argentum reflecting layer deposition one deck ITO transparency conducting layer, on transparency conducting layer, also scribble the oriented layer that a strata methyl alkyl siloxane base acid imide/diethanolamine (DEA) titanium chelate material constitutes, under vacuum with the liquid crystal compound material, the black liquid crystal compound that multiple dichromatic dye and dopant material are configured to pours into liquid crystal cell, seal the formation Liquid Crystal Display (LCD), photosensor is installed in the outside face of Liquid Crystal Display (LCD).
Above-mentioned described liquid crystal compound material is a kind of nematic crystal with negative dielectric anisotropic, is mixed by 6 class liquid crystal monomers to constitute, and its proportioning is as follows:
Proportioning is as follows:
Above-mentioned described dyestuff is a positivity bitintability dyestuff, comprises the dye mixture of monochrome, black or particular shade of color.
Above-mentioned described dopant material is a chipal compounds--comprise cholesteryl compound, its amount ranges is the 0.05-5% of liquid crystal and dye mixture weight.
The set of dispense of above-mentioned described black liquid crystal compound is such as down, in unit of weight:
Liquid crystal compound material 9.679g
Dichromatic dye LCD-102 0.0400g
Dichromatic dye LCD-209 0.1491g
Dichromatic dye D-35 0.0750g
Dichromatic dye G-232 0.0641g
Chiral liquid crystal CB-15 0.1200g
Above-mentioned described oriented material is poly-methyl alkyl siloxane base acid imide, and its general formula is:
Wherein: R:-C
nH
2n+1, n=5-40, X:-O-and-CO-, Y=2-4, m＞1, n=5-100.
The poly-methyl alkyl siloxane base acid imide of above-mentioned described oriented material also can replace with poly-methyl alkyl siloxane material, and its general formula is:
Wherein: the R=alkyl (C5～C40), n＞10, x＞10
Above-mentioned described diethanolamine (DEA) titanium chelate oriented material is two (N-octadecyl-N-dihydroxy ethyl) diisopropyl metatitanic acid fat,
Its general formula is:
Wherein: n=5-40
Principle of work of the present invention and characteristics are: it is liquid crystal that the principal element that influences the back mirror optical display properties has been narrated in the front, the structure of dichromatic dye and oriented material and prescription, different with aforesaid eurymeric Liquid Crystal Display (LCD) principle is that the present invention is the transoid Liquid Crystal Display (LCD), so the oriented material that adopts has related to the vertical orientated material of three class novel stabilisings: poly-methyl alkyl siloxane base acyl industry amine, diethanolamine (DEA) titanium chelate and poly-methyl alkyl siloxane, this three classes oriented material has the heat stability height, good insulating, tackness is strong, uvioresistant is made good use of, tilt angle is at 75 °～95 °, Deng good characteristic, be useful in transoid Liquid Crystal Display (LCD) aspect, make a high-contrast, the transoid liquid crystal back mirror of uvioresistant and Heat stability is good, except that oriented material, liquid crystal compound and dye formulation are suitable The key factor.Liquid crystal is that to have a viscosity low, to UV stable and with the nematic crystal of the good negative dielectric anisotropic characteristic of dyestuff intermiscibility.Novel liquid crystal compound provided by the present invention, and with the prescription of multiple bitintability dyestuff, be applicable to transoid liquid crystal back mirror exactly and demonstrate its excellent optical, when applying 6-10 volt voltage, back telltale visor is 16～20% to the reflection of incident light rate, be dark attitude, not during making alive, back mirror light reflex rate is 65-75%, be bright attitude, therefore the contrast ratio of transoid liquid crystal back mirror is 3.1～4.0, and such parameter is to manifesting splendid optics and visual effect as the transoid liquid crystal back mirror that uses on the automobile.In addition, back mirror of the present invention is by senile experiment, and is good to anti-anti-ultraviolet property.
The present invention adopts the negative dielectric anisotropy liquid crystal material to make liquid crystal compound with bitintability dyestuff and relevant chemical material, and the Liquid Crystal Display (LCD) made of the vertical orientated material that adopts high tilt angle, cooperate photosensor trigger circuit system and shell to connect to form liquid crystal back mirror with an automatic light meter, the principle that the light and shade variation takes place for it is just opposite with aforesaid eurymeric liquid crystal back mirror, the telltale that belongs to the transoid liquid crystal, when no power, minute surface presents bright attitude, its backsight ability is equal to general mirror, minute surface transfers dark attitude to after energising, and the specular reflection ability weakens.Do not need power connection when using daytime, and minute surface presents bright attitude, and its back vision function is the same with common back mirror.Night is when using, if there is strong illumination at the rear, photosensor trigger circuit system, circuit is opened, minute surface is deepening, this moment, back mirror lowered the reflection of light ability, made light not stimulate eyes, no matter daytime or night circuit interruption, even it is out of joint that characteristics are Circuits System, minute surface still keeps bright attitude, can not have the problem on the safety normally according to thing, in addition, used silver-colored reflecting surface double as conductive layer not among the present invention, it does not directly contact with dyestuff with liquid crystal, therefore can not make liquid crystal and dyestuff and silver effect and attenuating service life under electric field action.Silver-colored catadioptre of the present invention places the inside face of glass substrate, has overcome ghost phenomena.Because the principle and the characteristics of the invention described above make that this liquid crystal back mirror driving voltage with an automatic light meter is low, fast to electric field response, response time is less than 1 second, and the visual angle is wide, and contrast ratio reaches 3.5.The advantage that also has adjustable gray scale, on technology, not only manufacturing process is simple, and is not subjected to the restriction of minute surface size, so no matter all applicable on roadlice or heavy duty truck.
Description of drawings
Fig. 1. be textural association scheme drawing of the present utility model
Fig. 2. be principle schematic of the present utility model
Fig. 3. be the utility model Liquid Crystal Display (LCD) principle of work pellucidity scheme drawing
Fig. 4. be the utility model Liquid Crystal Display (LCD) principle of work deepening view
Embodiment
Below in conjunction with accompanying drawing in detail the present invention is described in detail, from Fig. 1,2 structural principles of the present invention as can be seen, a kind of liquid crystal back mirror with an automatic light meter, by Liquid Crystal Display (LCD) 4, photosensor 3, IC circuit card 2, power supply 1, housing link span 6 and geometrical clamp 5 constitute, Liquid Crystal Display (LCD) 4 is fixedly mounted in the housing link span 6 that has geometrical clamp 5, the battery 1 that is placed on housing link span 6 back sides is communicated with Liquid Crystal Display (LCD) 4, Liquid Crystal Display (LCD) 4 is made up of with following sheet transparency glass plate 16 last slice transparency glass plate 11, at inside face deposition one deck ITO of transparency glass plate 11 transparency conducting layer 12, on transparency conducting layer 12, coating one deck polyimide insulative layer 13, scribble the oriented layer 14 that a strata methyl octadecyl siloxy group acid imide or two (N-octadecyl-N-dihydroxy ethyl) diisopropyl metatitanic acid fat constitute on the insulating barrier 13, on the inside face of transparent glass substrate 16, depositing argentum reflecting layer 15, and on argentum reflecting layer 15, deposit one deck ITO transparency conducting layer 12, on transparency conducting layer 12, also scribble the oriented layer 14 that a strata methyl octadecyl siloxy group acid imide or two (N-octadecyl-N-dihydroxy ethyl) diisopropyl metatitanic acid fat constitute.Between two glass sheets, uniformly dispersing interval insulant-beaded glass 8 that size diameter is 3 μ～20 μ, and guaranteeing certain interval, two sheet glass substrates are compound up and down, all around with edge sealing adhesive 7 glutinous and, form liquid crystal cell.The black liquid crystal compound of liquid crystal compound material 9, bitintability dyestuff 10 and chipal compounds configuration is poured in the liquid crystal cell, with forming Liquid Crystal Display (LCD) 4 behind the edge sealing adhesive 7 bonding liquid crystal cells, photosensor 3 connects the outside face that IC circuit card 2 is installed in Liquid Crystal Display (LCD) 4, is combined into liquid crystal back mirror with an automatic light meter.
To prepare embodiment as follows for involved black liquid crystal compound and oriented material in above-mentioned implementation process:
The embodiment of black liquid crystal compound configuration:
Liquid crystal compound material 9.6719g
Dichromatic dye LCD-102 0.0400g
Dichromatic dye LCD-209 0.1491g
Dichromatic dye D-35 0.0750g
Dichromatic dye G-232 0.0641g
Chiral liquid crystal CB-15 0.1200g
Wherein dyestuff can be the dye mixture of monochrome, black or particular shade of color.
The embodiment that oriented material is synthetic:
Poly-methyl octadecyl siloxy group acid imide is synthetic:
With 1 of 10 grams (14.4 mM); 3-bis-ethylamino-1,3-dimethyl-1,3-octadecyl disiloxane are dissolved in 100 milliliters of anhydrous dimethyl formamides; in nitrogen protection; add 4.64 gram (14.4 mMs) 3,3 ', 4; 4 '-diphenylmethanone tetracarboxylic acid dianhydride; temperature of reaction is controlled at about 0 ℃, dropwises the back stirring at room 2 hours, and the pressure reducing and steaming solvent obtains silicone polyimide solution product 14 grams.
Two (N-octadecyl-N-dihydroxy ethyl) diisopropyl metatitanic acid fat is synthetic:
28.4 gram (0.1 mole) isopropyl titanates are placed reaction bulb, add 65.8 gram (0.2 mole) N-octadecane-N-diethanolamine (DEA), response control is about 25 ℃, dropwise, continue reaction 1 hour at 70 ℃, isopropyl alcohol is removed in decompression, gets product liquid 93 grams.
Fig. 3 and Fig. 4 have shown the principle of work of back mirror, when not having electric field, back mirror is transparent, otherwise, when applying electric field, then become opaque, among Fig. 3, because of both molecular axiss of liquid crystal material 9 and dichromatic dye 10 almost perpendicular to glass board 11 and 16, so present clear state, among Fig. 4, their molecular axis almost is parallel to glass board and is dark attitude.So transoid liquid crystal back mirror with an automatic light meter can borrow photosensor 3 to carry out automatic guidance in conjunction with IC circuit card 2 systems, when light projects back mirror, the photosensor energized at once that can be excited, then liquid crystal mirror grows dark automatically, when high light is eliminated, photosensor 3 restores to the original state, supply disconnecton makes liquid crystal mirror get back to clear state again, therefore, as automobile rearview mirror, driving vehicle is safe and reliable in the environment of night or poor visibility.
Claims (8)
1. liquid crystal back mirror with an automatic light meter, by Liquid Crystal Display (LCD), photosensor, power supply and housing link span constitute, its Liquid Crystal Display (LCD) is fixed in the housing link span, be placed on power supply connection Liquid Crystal Display (LCD) on the housing link span, its characteristics are: Liquid Crystal Display (LCD) is overlaped by transparent flat glass board A and transparent flat glass board B plane, interval insulant-beaded glass with 3 μ～20 μ separates therebetween, bind with edge sealing adhesive all around, form liquid crystal cell, wherein at inside face deposition one deck ITO of transparent flat glass board A transparency conducting layer, on transparency conducting layer, scribble one deck polyimide insulative layer, scribble the oriented layer that a strata methyl alkyl siloxane base acid imide/diethanolamine (DEA) titanium chelate material constitutes on the insulating barrier, on the inside face of transparent flat glass board B, depositing argentum reflecting layer, and on argentum reflecting layer deposition one deck ITO transparency conducting layer, on transparency conducting layer, also scribble the oriented layer that a strata methyl alkyl siloxane base acid imide/diethanolamine (DEA) titanium chelate material constitutes, under vacuum with the liquid crystal compound material, the black liquid crystal compound that multiple dichromatic dye and dopant material are configured to pours into liquid crystal cell, seal the formation Liquid Crystal Display (LCD), photosensor is installed in the outside face of Liquid Crystal Display (LCD).
2. liquid crystal according to claim 1 back mirror with an automatic light meter is characterized in that:
Described liquid crystal compound material is a kind of nematic crystal with negative dielectric anisotropic, is mixed by 6 class liquid crystal monomers to constitute, and its proportioning is as follows:
19.3wt％
20.0wt％
26.6wt％
10.3wt％
3. liquid crystal according to claim 1 back mirror with an automatic light meter is characterized in that: described dyestuff is a positivity bitintability dyestuff, comprises the dye mixture of monochrome, black or particular shade of color.
4. liquid crystal according to claim 1 back mirror with an automatic light meter, it is characterized in that: described dopant material is a chipal compounds--comprise cholesteryl compound, its amount ranges is the 0.05-5% of liquid crystal and dye mixture weight.
5. liquid crystal according to claim 1 back mirror with an automatic light meter is characterized in that: the set of dispense of described black liquid crystal compound is such as down, in unit of weight:
Liquid crystal compound material 9.6719g
Dichromatic dye LCD-102 0.0400g
Dichromatic dye LCD-209 0.1491g
Dichromatic dye D-35 0.0750g
Dichromatic dye G-232 0.0641g
Chiral liquid crystal CB-15 0.1200g
6. liquid crystal according to claim 1 back mirror with an automatic light meter is characterized in that: described oriented material is poly-methyl alkyl siloxane base acid imide, and its general formula is:
Wherein: R:-C
nH
2n+1, n=5-40, X:-O-and-CO-, Y=2-4, m＞1, n=5-100.
7. liquid crystal according to claim 1 back mirror with an automatic light meter is characterized in that: the poly-methyl alkyl siloxane alkylimide of described oriented material also can replace with poly-methyl alkyl siloxane material, and its general formula is:
Wherein: the R=alkyl (C5～C40), n＞10, x＞10
8. liquid crystal according to claim 1 back mirror with an automatic light meter is characterized in that: described diethanolamine (DEA) titanium chelate oriented material is two (N-octadecyl-N-dihydroxy ethyl) diisopropyl metatitanic acid fat, and its general formula is:
Wherein: n=5-40
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767525A (en) * | 2010-02-03 | 2010-07-07 | 江西合力泰微电子有限公司 | Automatic color-changing vehicle glare proof mirror |
| CN101811474A (en) * | 2009-02-25 | 2010-08-25 | 株式会社村上开明堂 | Vehicle mirror and manufacture method thereof |
| CN101571652B (en) * | 2008-04-28 | 2012-07-04 | 苏州汉朗光电有限公司 | Liquid crystal display screen |
| CN102667599A (en) * | 2009-12-16 | 2012-09-12 | Sody株式会社 | LCD light attenuation device and vehicle intelligent mirror using same |
| CN104354646A (en) * | 2014-11-07 | 2015-02-18 | 高辉（天津）科技有限公司 | Large automobile liquid crystal anti-dazzling rearview mirror |
| CN104531164A (en) * | 2014-12-05 | 2015-04-22 | 深圳市万明精工科技有限公司 | High molecular reinforced negative cholesteric phase mixed liquid crystal material and application method thereof |
| CN105676503A (en) * | 2014-12-03 | 2016-06-15 | 现代自动车株式会社 | Smart window using glass beads and liquid crystal, and production method therefor |
| CN105905035A (en) * | 2016-06-15 | 2016-08-31 | 北京兴科迪科技有限公司 | Vehicle inner rearview mirror easy to clean |
| CN116661201A (en) * | 2023-06-01 | 2023-08-29 | 莆田市佳阳电子有限公司 | Anti-glare structure and rearview mirror |
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2003
- 2003-10-27 CN CN 200310102211 patent/CN1278887C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571652B (en) * | 2008-04-28 | 2012-07-04 | 苏州汉朗光电有限公司 | Liquid crystal display screen |
| CN101811474A (en) * | 2009-02-25 | 2010-08-25 | 株式会社村上开明堂 | Vehicle mirror and manufacture method thereof |
| CN101811474B (en) * | 2009-02-25 | 2014-04-09 | 株式会社村上开明堂 | Vehicle mirror and manufacturing method therefor |
| CN102667599A (en) * | 2009-12-16 | 2012-09-12 | Sody株式会社 | LCD light attenuation device and vehicle intelligent mirror using same |
| CN101767525A (en) * | 2010-02-03 | 2010-07-07 | 江西合力泰微电子有限公司 | Automatic color-changing vehicle glare proof mirror |
| CN104354646A (en) * | 2014-11-07 | 2015-02-18 | 高辉（天津）科技有限公司 | Large automobile liquid crystal anti-dazzling rearview mirror |
| CN105676503B (en) * | 2014-12-03 | 2020-10-23 | 现代自动车株式会社 | Smart window using glass beads and liquid crystal and method for manufacturing the same |
| CN105676503A (en) * | 2014-12-03 | 2016-06-15 | 现代自动车株式会社 | Smart window using glass beads and liquid crystal, and production method therefor |
| CN104531164A (en) * | 2014-12-05 | 2015-04-22 | 深圳市万明精工科技有限公司 | High molecular reinforced negative cholesteric phase mixed liquid crystal material and application method thereof |
| CN105905035B (en) * | 2016-06-15 | 2018-07-13 | 北京兴科迪科技有限公司 | A kind of formula rear-viewing mirror in vehicle easy to clean |
| CN105905035A (en) * | 2016-06-15 | 2016-08-31 | 北京兴科迪科技有限公司 | Vehicle inner rearview mirror easy to clean |
| CN116661201A (en) * | 2023-06-01 | 2023-08-29 | 莆田市佳阳电子有限公司 | Anti-glare structure and rearview mirror |
| CN116661201B (en) * | 2023-06-01 | 2023-11-17 | 莆田市佳阳电子有限公司 | Anti-glare structure and rearview mirror |
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Granted publication date: 20061011 Termination date: 20121027 |