• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An arrangement for driving liquid crystal cells in antiglare glasses, in which an adjustment to the varying light conditions is achieved on the basis of a self-acting transparency control. A plurality of first liquid crystal cells (7.1, 7.2, 7.3), form an eye shield and are electrically connected to light sensors (4.1, 4.2, 4.3) via driving units (5.1, 5.2, 5.3). A further liquid crystal cell (3) is disposed in front of the light sensors (4.1, 4.2, 4.3) and is arranged to act as a variable light filter. The cell (3) is connected via a driving unit (2) to an additional light sensor (1) which is arranged to control the cell (3) in response to the ambient luminance. <IMAGE>
    公开号:SU1446590A1
    申请号:SU847773327
    申请日:1984-02-20
    公开日:1988-12-23
    发明作者:Рюдигер Соломон；Клаус Ниче；Герд Бернер
    申请人:Феб Карл Цейсс Йена (Инопредприятие)；
    IPC主号:
    专利说明:

    (L
    i4ib 4i od SL

    The invention relates to the field of controlling the transmission of glasses and can be used to protect against the blinding effect during the day and at night.
    A device for protecting the eyes from a blinding effect is known, for example, German Application No. 2315308, Claude 27/02, published 1974, containing a photosensitive element, which, when the lighting conditions change, forms a signal for controlling liquid crystals.
    The purpose of the invention is to provide automatic control of the transmission coefficient of points during a daily change of illumination.
    FIG. 1 shows a control scheme for protection against the blinding effect} of FIG. 2 — the dependence of the transmission degree 2 on the ambient illumination intensity Φ FIG. 3 — the ratio of the ambient illumination intensity to the lightness perceived as glare in time dependent; Fig. 4 shows the dependence of the transmission degree on the illumination brightness in a limited range of the viewing angle fd.
    The photosensitive element 1 for measuring the luminance of ambient light through the control unit 2 is electrically connected to the cell of 3 liquid crystals acting as a variable (adjustable) filter. Cell 3 of liquid crystals is installed as a filter in front of the photosensitive elements 4..3 which, in turn, are connected by an alarm circuit through associated control nodes 5.1-5., 3, which form the eye field of eye 6, with corresponding portions of cells 7, 1-7оЗ liquid crystals. The power supply node 8 is connected to the control unit (tsimi nodes 2 and 5 "1-5s3s
    The photosensitive elements 4.1–4.3 and the associated control nodes .3 are so coordinated with the cells 7c, 1-7 ± 3 liquid crystals, that when a predetermined value of the light threshold is exceeded, a signal is generated through the corresponding control, which causes a change in the degree of transmission corresponding to sections 7.1-7.3 of liquid crystals. Above the threshold of the light
    f) is measured depending on the intensity of the blinding radiation.
    The luminous flux supplied to the photosensitive elements 4.1-4.3 is controlled by the photosensitive element 1, the control unit 2 and the cell 3 of liquid crystals, depending on the brightness of the surrounding environment. Fig. 2 shows a schematic representation of the degree of transmission of a cell of 3 liquid crystals, acting as a filter, and the brightness of the ambient radiation Rc. As is known, the perceived blinding brightness of light P depends on and. In the example, depending on the time shown in Fig. 3, the brightness of light in a limited range of the viewing angle Rc at a certain Φ (only then is perceived to be blind when it exceeds the value of e,. If the brightness of the light is divided into the ranges Rd RvD F and Fz for Φz A relationship is observed between Fd and 7. (Fig. 4). The fact that the photosensitive elements 4.1-4.3 change the transmission degree S t is optically coupled to a cell of 3 liquid crystals acting as a filter, and the degree of transmission cH is measured according to from f {, conditioned The change is y, if fd 9g dl f., depending on Rd iff ,.
    In this way, the control circuit is automatically adapted to the corresponding lighting conditions and the relationship between F and Fn is necessary for this, due to the optical coupling.
    权利要求:
    Claims (5)
    [1]
    Invention Formula
    1 o A goggles control device for blinding, including liquid crystal cells, electrically connected through control units with light-sensitive elements and a power supply unit, characterized in that, in order to ensure automatic control of the transmittance during a daily change in illumination, it is additionally equipped with a variable filter installed in front of the photosensitive elements, made in the form of a cell of liquid crystals
    which through extra
    tal,
    the control unit is associated with the additionally introduced photosensitive element.
    [2]
    2 o The device according to claim 1, characterized in that the control nodes are adapted to adjust the threshold.
    [3]
    3, Device pop, 1, characterized in that the slope of the transmittance characteristic of the liquid crystal cells is less than that of the liquid crystal filter cells.


    [4]
    4. Device POP.1, ex
    This is because the sensitivity of the photosensitive elements is lower than that of the additionally introduced.
    [5]
    5. A device according to claim 1, characterized in that the transmission coefficients of the control nodes are lower than that of the additional ones.
    It is recognized as an invention according to the results of the examination carried out by the Office for the Invention of the German Democratic Republic.
    Phi
    FIG. r - F,
     Phi
    (PB dl fi
     Phi
    /
    F
    four
    FIG.
    L
    7
    Fig.C
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    DD228953A3|1985-10-23|
    DE3404748A1|1984-10-04|
    GB8407797D0|1984-05-02|
    CS272258B1|1991-01-15|
    GB2137373A|1984-10-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4136588C2|1991-11-07|1993-11-18|Deutsche Aerospace|Device for protection against excessive optical power and energy densities|
    US5550677A|1993-02-26|1996-08-27|Donnelly Corporation|Automatic rearview mirror system using a photosensor array|
    US6822563B2|1997-09-22|2004-11-23|Donnelly Corporation|Vehicle imaging system with accessory control|
    US7655894B2|1996-03-25|2010-02-02|Donnelly Corporation|Vehicular image sensing system|
    US5670935A|1993-02-26|1997-09-23|Donnelly Corporation|Rearview vision system for vehicle including panoramic view|
    US5877897A|1993-02-26|1999-03-02|Donnelly Corporation|Automatic rearview mirror, vehicle lighting control and vehicle interior monitoring system using a photosensor array|
    DE4330817C1|1993-09-13|1994-12-01|Optrel Ag|Method of controlling an antiglare device, and antiglare device for performing the method|
    US5671035A|1995-06-07|1997-09-23|Barnes; Elwood E.|Light intensity reduction apparatus and method|
    DE19714434A1|1997-04-08|1998-10-15|Armin Schaeuble|Selective electronic photo-protective spectacles|
    GB2341965A|1998-09-24|2000-03-29|Secr Defence|Pattern recognition|
    US7585068B2|2004-12-03|2009-09-08|Dynamic Eye, Inc.|Method and apparatus for calibrating glare-shielding glasses|
    US7720580B2|2004-12-23|2010-05-18|Donnelly Corporation|Object detection system for vehicle|
    WO2008024639A2|2006-08-11|2008-02-28|Donnelly Corporation|Automatic headlamp control system|
    US8017898B2|2007-08-17|2011-09-13|Magna Electronics Inc.|Vehicular imaging system in an automatic headlamp control system|
    US20100020170A1|2008-07-24|2010-01-28|Higgins-Luthman Michael J|Vehicle Imaging System|
    WO2015169166A1|2014-05-04|2015-11-12|丹阳博来腾光电科技有限公司|Anti-glare lens, device, spectacles, and method against vehicle lamplight|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD24935683A|DD228953A3|1983-03-29|1983-03-29|ARRANGEMENT FOR OPERATING BLADE GOGGLES|
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