KR900001045Y1 - Antiglare mirror - Google Patents
Antiglare mirror Download PDFInfo
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- KR900001045Y1 KR900001045Y1 KR2019870008379U KR870008379U KR900001045Y1 KR 900001045 Y1 KR900001045 Y1 KR 900001045Y1 KR 2019870008379 U KR2019870008379 U KR 2019870008379U KR 870008379 U KR870008379 U KR 870008379U KR 900001045 Y1 KR900001045 Y1 KR 900001045Y1
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- liquid crystal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
- B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
- B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13725—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on guest-host interaction
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 방현거울에 관한 구조를 도시하는 단층도.1 is a tomogram showing the structure of a conventional anti-glare mirror.
제2도는 본 고안 방현거울의 구조를 도시하는 단층도.2 is a tomogram showing the structure of the anti-glare mirror of the present invention.
제3도는 본 고안 방현거울의 포컬코닉 피치에 따른 전압대 광흡수 관계를 나타내는 그래프.3 is a graph showing the voltage-to-light absorption relationship according to the focal conic pitch of the present invention antiglare mirror.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
3 : 투명전극 5 : 수직배향막3: transparent electrode 5: vertical alignment film
8 : 액정 11 : 실리콘나이트라이드층8: liquid crystal 11: silicon nitride layer
본 고안은 외부광의 반사량을 흡수하는 방현거울에 관한 것이다.The present invention relates to an antiglare mirror that absorbs the amount of reflection of external light.
야간에 후속차량의 전조등 불빛이 백미러에 의해 운전자의 시계범위로 반사되어 현혹을 일으키는 일이 있다. 방현거울은 이러한 후속차량의 건조등 반사광으로 부터 운전자가 현혹되지 않도록 하기 위하여 챠량의 백미러에 주로 사용된다.At night, the headlights of subsequent vehicles are reflected by the rearview mirror into the driver's field of view, causing deception. Anti-glare mirrors are mainly used in the rear view mirror of the vehicle to prevent the driver from being deceived from the reflected light of the following vehicles.
그러므로 방현거울이라 함은 외부광에 대하여 반사율을 저하시키는 감쇠수단을 보유한 거울을 의미한다.Therefore, the antiglare mirror means a mirror having attenuation means for lowering reflectance of external light.
외부광의 반사율을 저하시키는 방식으로는 편광판, 색필터, 하프미러, 프리즘 등을 이용하거나 이들을 조합시킨 광량 감쇠방식과, 반사면에 요철을 부여하여 반사광이 운전자측으로 비취지지 않게 하거나 또는 산란시켜 눈부심이 생기지 않게 하는 산광방식이 있다.As a method of lowering the reflectance of external light, a light amount attenuation method using or combining polarizing plates, color filters, half mirrors, prisms, and the like, and irregularities are applied to the reflecting surface so that the reflected light is not reflected or scattered to the driver side. There is a scattering method that does not occur.
그런데 상기한 방식은 어느 것이거나 근본이 입사광량을 일정비율로 감쇠시키거나 또는 일정방향으로 편반사시킴에 있는 것이므로 거울에 투영되는 물체의 상이 어둡게 보이는 결점이 있다.However, in any of the above methods, since the fundamental is to attenuate the amount of incident light at a constant rate or to polarize it in a predetermined direction, the image of the object projected on the mirror is dark.
이를 해결하는 방법으로서 최근에 액정의 광흡수성질을 이용한 방현거울이 제안되어 주목을 받고 있다.As a method of solving this problem, an antiglare mirror using light absorbing properties of liquid crystals has recently been proposed and attracts attention.
이 종류 방현거울은 경면에 액정소자를 배치하여 일정이상의 광량을 갖는 외부광이 비취질 때, 액정이 배향변화를 일으켜 방현효과가 나타나도록 한 것이며, 여기에 사용될 수 있는 액정은 포지티브 혹은 네가티브 유전이방성 네마틱액정에 2색성 염료를 혼합한 것이 있다.This type of anti-glare mirror has a liquid crystal element disposed on a mirror surface so that when the external light having a certain amount of light is reflected, the liquid crystal causes an orientation change to cause an anti-glare effect, and the liquid crystal that can be used here is positive or negative dielectric anisotropy. There is a mixture of dichroic dyes in nematic liquid crystals.
그런데 포지티브 유전이방성 네마틱액정은 전압이 가해지지 않은 상태에서 전극에 대해 수평 배향되어 광흡수효과를 나타내는 것이므로, 통상의 백미러로 되게 하려면 항상 전압을 인가하여 액정이 수직배향되게 해야하는 것이므로 전력 소모가 많고, 액정의 동작시간이 길어서 수명이 짧은 결점이 있는 것으로 알려져 있다.However, since positive dielectric anisotropic nematic liquid crystal exhibits light absorption effect by being horizontally oriented with respect to the electrode in a state where no voltage is applied, it is necessary to apply voltage at all times to make the liquid crystal be vertically oriented so that a normal rearview mirror can consume power. It is known that there is a drawback in that the operating time of the liquid crystal is long and its life is short.
이와는 달리, 네가티브 유전이방성 네마틱액정은 전압비 인가상태에서 수직배향되어 통상의 백미러로서의 기능을 나타내고, 또 전압이 인가되면 수평배향으로 변환되어 광흡수효과를 나타내는 것이므로 전력소모가 적고 사용수명이 긴것으로 알려져 있다.In contrast, the negative dielectric anisotropic nematic liquid crystal exhibits a function as a normal rearview mirror in a state where no voltage is applied, and functions as a normal rearview mirror, and converts to a horizontal orientation when a voltage is applied, and thus exhibits light absorption effect. Known.
그러나 상기한 네가티브 유전이방성 네마틱액정은 초기 동작전압이 높고, 온-오프 콘트라스트비가 낮은 까닭에 화상의 선명도에서 손색이 있다.However, the negative dielectric anisotropic nematic liquid crystal described above is inferior in sharpness of an image because of its high initial operating voltage and low on-off contrast ratio.
제1도는 액정을 이용한 방현거울의 단층구조를 도시하며, 상, 하측유리기판(1)(2)사이의 대향면에 상, 하측투명전극(3)(4)를 코오팅하고, 이어서 양 투명전극(3)(4)의 상면에 상, 하측 수직배향막(5)(6)을 시설한 다음, 스페이서로 간격을 이루도록 배치함과 동시에 가장자리를 밀봉재(7)로 밀봉처리한 후, 내부에 액정(8)을 주입시키고 또 상측 유리기판(1)위로 MGF2층(9)가, 그리고 하측 유리기판(2)의 밑면에 l500-3000옹 그스트롬의 두께로 알미늄박막이 고오팅되어 반사층(10)을 형성하고 있다.1 shows a single-layer structure of an antiglare mirror using liquid crystal, and coats the upper and lower transparent electrodes 3 and 4 on opposite surfaces between the upper and lower glass substrates 1 and 2, followed by both transparent layers. The upper and lower vertical alignment layers 5 and 6 are provided on the upper surfaces of the electrodes 3 and 4, and the spacers are arranged with a spacer at the same time, and the edges are sealed with the sealing material 7, and then the liquid crystals inside. (8) and an MGF2 layer (9) on the upper glass substrate (1) and an aluminum thin film of l500-3000 angstroms on the underside of the lower glass substrate (2) were coated on the reflective layer (10). To form.
이와 같은 구조의 방현거울이라도 전혀 문제가 없는 것은 아니며, 예컨대 제조과정에서 액정에 혼합되는 도전성 이물질 등으로 인하여 방현거울의 수율이 낮아지는 등의 문제점을 해결해야 한다.Even the antiglare mirror having such a structure does not have any problem. For example, the yield of the antiglare mirror is reduced due to the conductive foreign matter mixed in the liquid crystal during the manufacturing process.
본 고안의 목적은 액정을 이용한 방현거울에 있어서, 전극 간의 전기적인 누설을 방지할 수 있고, 낮은 포컬코닉 피치에서도 콘트라스트비가 양호한 방현거울을 제공함에 있다.An object of the present invention is to provide an anti-glare mirror having a good contrast ratio even in a low focal conic pitch in the anti-glare mirror using a liquid crystal.
상기 목적에 따라, 본 고안은 절연피막이 투명전극 상에 코오팅되고, 액정에 블루염료를 2% 혼입함과 동시에 포컬코닉 피치를 0.4-0.59로 설정함을 특징으로 한다.According to the above object, the present invention is characterized in that the insulating coating is coated on the transparent electrode, and the focal conic pitch is set to 0.4-0.59 while mixing blue dye in the liquid crystal.
상기한 바와 같이 포컬코닉 피치를 0.4-0.59로 제한하는 이유는 실험의 결과, 상기 범위에서 온-오프 콘트라스트비가 양호하고 전력소모율이 낮아졌기 때문이다.The reason for limiting the focal conic pitch to 0.4-0.59 as described above is that, as a result of the experiment, the on-off contrast ratio is good and the power consumption rate is lowered in the above range.
투명전극 상에 코오팅되는 절연피막은 두께 300-1000옹 그스트롬의 실리콘나이트라이드층을 사용한다. 이하, 본 고안을 첨부도면 제2도 및 제3도를 참조하여 상세히 설명한다.The insulating coating coated on the transparent electrode uses a silicon nitride layer having a thickness of 300-1000 angstroms. Hereinafter, the present invention will be described in detail with reference to FIGS. 2 and 3.
본 고안의 방현거울은 상측의 투명전극(3)과, 수직배향막(5) 사이에 실리콘 나이트라이드층(11)이 300-l000옹 그스트롬 두께로 증착되어 절연층을 형성하고 있으며, 서로 대향하여 배치되는 상, 하측 수직배향막(5)(6)은 스핀 코팅방식에 의해 배향처리된다.In the anti-glare mirror of the present invention, a silicon nitride layer 11 is deposited to have a thickness of 300-l000 angstroms between the upper transparent electrode 3 and the vertical alignment layer 5 to form an insulating layer. The upper and lower vertical alignment layers 5 and 6 which are arranged are oriented by spin coating.
액정(8)은 네가티브 네마틱액정에 블루염료 2%를 용해시켜 된 것이 주입된다.The liquid crystal 8 inject | pours what melt | dissolved blue dye 2% in the negative nematic liquid crystal.
이때, 액정(8)에 콜레스테릭물질을 혼합하여 포컬코닉 피치가 0.4-0.6의 범위에 놓여지게 조절한다.At this time, the cholesteric material is mixed with the liquid crystal 8 to adjust the focal conic pitch to be in the range of 0.4-0.6.
상기의 포컬코닉피치는 제3도 그래프로 나타낸 바와 같이, 크게할 수록 광 투과율이 낮아져서 방현효과를 향상할 수 있는 것이나, 이에 비례하여 전력소모도 커지게 되므로 적당한 수준으로 제한할 필요가 있으며, 본 고안에서는 블루염료 2%를 첨가함에 따르는 콘트라스트비의 향상효과로 인하여 0.4-0.59의 범위에서도 실용 가능한 방현효과를 얻을 수 있었다.As shown in the graph of FIG. 3, the focal conic pitch has a lower light transmittance to improve the anti-glare effect, but the power consumption also increases in proportion to it, so it is necessary to limit it to an appropriate level. In the design, the antiglare effect was obtained even in the range of 0.4-0.59 due to the improvement of the contrast ratio by adding 2% of the blue dye.
그러므로 본 고안은 포컬코닉 피치를 방현효과도 좋고, 전력소모가 작은 0.4-0.6의 범위로 제한한다.Therefore, the present invention limits the focal conic pitch to the range of 0.4-0.6 which has good anti-glare effect and low power consumption.
본 고안은 블루염료를 액정에 첨가시킴으로써 포콜코닉피치를 종래보다 낮게 설정하였음에도 불구하고, 양호한 방현효과를 나타낸다.The present invention shows good anti-glare effect even though the pocolonic pitch is set lower than before by adding blue dye to the liquid crystal.
또 상, 하측 투명전극 상이에 실리콘나이트라이드층에 의해 완벽하게 절연되는 구조이므로 액정에 도던성 이물질이 혼입되어 있더라도 양 전극사이체 전기적 누설이 생기지 않기 때문에 방현효과가 저하되는 일 또한 발생하지 않는다.In addition, since the upper and lower transparent electrodes are completely insulated from each other by the silicon nitride layer, even if a foreign substance is mixed in the liquid crystal, the electrical leakage between the two electrodes does not occur, so that the antiglare effect does not occur.
또 사용되는 액정은 건압 비인가시에 항상 상, 하측 수직배향막에 따라 전압 수평배향되어 있다가, 별도의 광검출기(도시생략)가 다른 차량의 불빛을 감지하여 상, 하측 전극으로 전압을 인가시킬때, 수직배향으로 변환되어 방현효과를 나타내는 것이므로 전력소모가 작다.Also, the liquid crystal used is always horizontally oriented according to the upper and lower vertical alignment layers when dry pressure is not applied, and a separate photodetector (not shown) senses the light of another vehicle and applies voltage to the upper and lower electrodes. The power consumption is low because it is converted to vertical orientation and shows anti-glare effect.
이상과 같이 본 고안은 네가티브 네마틱 액정을 사용한 방현거울에 있어서, 포컬코닉 피치를 0.4-0.59 의 범위로 제한하여 전력소모를 줄임과 동시에, 상기의 포컬코닉 피치를 저하시킴에 수반되는 콘트라이트 비의 열화를, 액정에 블루염료 2%혼입하여 개선하고, 또 상, 하측 전극사이의 전기적 누설을 절연피막으로 방지한것이므로 전력소모가 작으면서도 콘트라이트 비가 양호하며, 액정의 이물질에 의한 전기적 누설이 없는 이점을 얻을 수 있다.As described above, the present invention reduces the power consumption by limiting the focal conic pitch to the range of 0.4-0.59 in an antiglare mirror using a negative nematic liquid crystal, and at the same time reduces the focal conic pitch. Is improved by adding 2% of blue dye to liquid crystal and preventing electrical leakage between upper and lower electrodes with insulating film, so that the power consumption is small and the contrast ratio is good. You can get the advantages.
Claims (1)
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870008379U KR900001045Y1 (en) | 1987-05-28 | 1987-05-28 | Antiglare mirror |
| JP1987133173U JPS63188636U (en) | 1987-05-28 | 1987-08-31 | |
| GB8729745A GB2205075B (en) | 1987-05-28 | 1987-12-21 | Rearview mirror |
| US07/142,637 US4848878A (en) | 1987-05-28 | 1988-01-11 | Non-glaring rearview mirror with liquid crystal mixture |
| CA000560908A CA1331913C (en) | 1987-05-28 | 1988-03-09 | Rearview mirror |
| SE8800831A SE468845B (en) | 1987-05-28 | 1988-03-09 | REAR MIRROR INTENDED TO ABSORP LIGHT TO THE ORIENTATION OF LIQUID CRYSTALS IN THE MIRROR |
| DE3808216A DE3808216A1 (en) | 1987-05-28 | 1988-03-11 | REARVIEW MIRROR |
| FR8803316A FR2615802A1 (en) | 1987-05-28 | 1988-03-15 | Rear-view mirror |
| IT8819896A IT1216497B (en) | 1987-05-28 | 1988-03-22 | REARVIEW MIRROR. |
| HK614/91A HK61491A (en) | 1987-05-28 | 1991-08-08 | Rearview mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870008379U KR900001045Y1 (en) | 1987-05-28 | 1987-05-28 | Antiglare mirror |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880021701U KR880021701U (en) | 1988-12-24 |
| KR900001045Y1 true KR900001045Y1 (en) | 1990-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870008379U Expired KR900001045Y1 (en) | 1987-05-28 | 1987-05-28 | Antiglare mirror |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900001045Y1 (en) |
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1987
- 1987-05-28 KR KR2019870008379U patent/KR900001045Y1/en not_active Expired
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| Publication number | Publication date |
|---|---|
| KR880021701U (en) | 1988-12-24 |
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