• 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:
    Briefly, according to one aspect of the invention, liquid crystal material, and especially nematic material, is encapsulated; according to another aspect the encapsulated liquid crystal material is used in liquid crystal devices, such as relatively large size visual display devices; and according to further aspects there are provided methods for encapsulating liquid crystal material and for making a liquid crystal device using such encapsulated liquid crystal material.
    公开号:SU1620056A3
    申请号:SU833596398
    申请日:1983-05-16
    公开日:1991-01-07
    发明作者:Ли Фергасон Джеймс
    申请人:Манчестер Р Энд Д Партнершип (Фирма)；
    IPC主号:
    专利说明:

    ku, 23, by shunting the material of a liquid crystal — 25 liquid crystal 1 to achieve an optal. Therefore, the impedance for current through wall 23 from point 25 to point 27 should be significant.
    compared to the impedance that could occur on the current path directly from point 25 to point 26 inside the inner surface 19 of the wall, directly through the material 10 of the liquid crystal to point 28 and also in volume 11, finally again to point 27
    The dielectric constants (coefficients) of the material, and from which the medium forms a capsule, and which contains the material constituting the liquid crystal, as well as the effective capacitance of the wall 23 of the capsule, in particular in the radial direction, and the liquid crystal material, at the ends which is supplied by an electric field — everything must be coordinated so that the wall 23 of the capsule 12 does not significantly reduce the magnitude of the applied electric field.
    The conventional equivalent electrical diagram of capsule 12 is shown in fig. The electric field comes from voltage source 6 when switch 7 is closed. Capacitor 32 has the capacity of liquid crystal material 10 in the enclosed liquid crystal 1. Capacitor 31 has a wall capacitance 23 of capsule 12
    0
    five
    0
    five
    0
    five
    optimal work, i.e. orientation of liquid crystal molecules with a minimum total energy consumption of source 6 voltage.
    Cause as thin as possible the wall 23 while maintaining its adequate strength to contain liquid crystal material 0 in volume 11, the values of capacitors 31, 32 can be increased especially in comparison with the thickness or length of the distance between the upper portion 29 of the liquid crystal material 10 of the lower part 30 its, which is approximately and equivalently form the plates of the same order of capacitor 32.
    As stated, the larger the capsule size, the smaller the electric field needed to achieve the orientation of the liquid crystal molecules in it. However, the larger the sphere (capsule), the longer the response time.
    Example. 0.45% of the pleochloric dye of the Sudan soot type B is dissolved in a liquid crystal which consists of aromatic esters. Such a composite material is marketed under the designation No. M8250 by Amerikan Lykid Kkal Chemical Cor., Kent, Ohio. This material is mixed with a solution of 7% polyvinyl alcohol (PVA), which is treated to remove all salts. Also prepare a solution with water type
    15
    20
    ASTM-100 The resulting mixture is placed in a colloid mill, and the material is ground for 4 minutes to obtain a suspension of particles of uniform size. The result is a stable emulsion, the size of the suspended particles of which is about 3 microns. The emulsion is applied to the mylar film, which is prefabricated. Q covered with a layer of tin oxide electrode. Use a squeegee to apply an emulsion material on a Maylar film on the side of a covered electrode layer.
    A 7 mm emulsion material is applied to such an electrode and dried to a total thickness of 0.8 mm. Then, a second layer of such an emulsion is applied onto the first layer, forming an aggregated layer of droplets of a liquid crystal in a matrix of polyvinyl alcohol, having a thickness of 1.6 mm. Preferably, the enclosed liquid crystals are deposited as a single layer of thickness 25 of one or more capsules.
    The liquid crystal device thus formed comprising a layer of Mylar, the electrode and the enclosed liquid crystals 30 are then tested by applying an electric field, after which the material changes from black to almost translucent. The material showed a very wide viewing angle and the contrast ratio was 7: 1 at 50 V electrical voltage, the switching rate was about 2 ms when turned on, and about 4 ms when turned off
    The proposed device provides the possibility of obtaining devices with liquid crystals of a large area while maintaining high lighting characteristics, moreover, to ensure the uniformity of these characteristics over the area and to maintain the control voltage within narrow limits, it is possible to ensure the gradation of capsules with diameters in order to eliminate their variations in one device. The input signal for the proposed device can be either
    162005612
    electric field or magnetic field.
    35
    40
    权利要求:
    Claims (8)
    [1]
    Invention Formula
    I Liquid crystal device with microencapsulated elements containing a set of closed volumes of liquid crystal material having a natural structure, the volumes of the liquid crystal material being distributed in a holding medium, characterized in that the level and uniformity of contrast are preserved, the material liquid crystal is chosen nematic with positive dielectric anisotropy and an ordinary refractive index equal to the refractive index the second medium,
    [2]
    2, the device according to claim 1, characterized in that the liquid crystal material contains a pleochromatic kiturl,
    [3]
    Device according to claims 1 and 2, characterized in that the retention medium is located on the substrate
    [4]
    4, the device according to claims, 1-3S, characterized in that it contains adhesive means located between the retaining medium and
    SUBSTRATE,
    [5]
    5 l Device according to claims 1-4, characterized in that it contains means for applying an electric field to the liquid crystal material
    [6]
    6. A device according to claim 5, characterized in that the means for applying an electric field are made with a pair of electrodes.
    [7]
    7. A device according to claims 1 to 6, characterized in that the holding medium is made in the form of a capsule for each volume of the material of a solid-state crystal,
    [8]
    8. The device according to claim 7, characterized in that the capsules are spherical.
    five
    0
    5 Q
    five
    0
    Formula invention
    I A liquid crystal device with microencapsulated elements containing a set of closed volumes of liquid crystal material having a natural structure, the volumes of liquid crystal material being distributed in a holding medium, characterized in that, to increase the area of the device while maintaining the level and uniformity of contrast, the liquid crystal material is selected with a positive dielectric anisotropy and an ordinary refractive index equal to the refractive index fluidized bed,
    2, the device according to claim 1, characterized in that the material of the liquid crystal contains a pleochroic dye,
    Device according to claims 1 and 2, characterized in that the retention medium is located on the substrate
    4, Apparatus according to claims, 1-3S, characterized in that it contains a sticking agent located between the holding medium and
    SUBSTRATE,
    5 l Device according to claims 1-4, characterized in that it comprises means for applying an electric field to the liquid crystal material
    6. A device according to claim 5, characterized in that the means for applying an electric field are made with a pair of electrodes.
    7. A device according to claims 1-6, characterized in that the holding medium is made in the form of a capsule for each volume of liquid crystal material with a curved surface,
    8. The device according to claim 7, characterized in that the capsules are spherical.
    FIG. 2
    77X / ™ g
    // t
    & bZvd Z2 jL /
    FIG. J
    and
    Figm
    FIG. five
    # L3p-j;
    # y-jj
    FIG. 6
    类似技术:
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    JPS6459323A|1989-03-07|Active device
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    同族专利:
    公开号 | 公开日
    EP0268877A2|1988-06-01|
    JPH0651284A|1994-02-25|
    WO1983001016A1|1983-03-31|
    JPH04305620A|1992-10-28|
    EP0088126A4|1985-06-26|
    UA5554A1|1994-12-28|
    KR840004266A|1984-10-10|
    GB2128626A|1984-05-02|
    CA1186502A|1985-05-07|
    AU1201583A|1984-09-06|
    AU567868B2|1987-12-10|
    EP0088126A1|1983-09-14|
    JPH079512B2|1995-02-01|
    DE3280302D1|1991-03-07|
    US4435047A|1984-03-06|
    BR8207867A|1983-08-30|
    US4616903A|1986-10-14|
    KR970000345B1|1997-01-08|
    EP0268877A3|1989-01-25|
    GB2128626B|1986-02-19|
    EP0088126B2|1995-01-04|
    SG11089G|1989-09-29|
    JPS58501631A|1983-09-29|
    GB8311442D0|1983-06-02|
    EP0088126B1|1991-01-30|
    JPH0352843B2|1991-08-13|
    引用文献:
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    法律状态:
    优先权:
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