Projector provided with a plurality of image generators
    11.
    发明授权
    Projector provided with a plurality of image generators 失效
    具有多个图像发生器的投影仪

    公开(公告)号:US5333021A

    公开(公告)日:1994-07-26

    申请号:US811020

    申请日:1991-12-20

    CPC分类号: H04N9/315

    摘要: A projector has means for supplying first and second radiation beams, first image generating means for modulating a plurality of portions of the first radiation beam individually and forming a deflected beam and a non-deflected beam to generate a first image, second image generating means for modulating a plurality of portions of the second radiation beam individually and forming a deflected beam and a non-deflected beam to generate a second image, and means for projecting the first and second images onto a predetermined plane by the use of one of the deflected beams and the non-deflected beams from the first and second image generating means, the first and second image generating means emitting the deflected beams so that most of the deflected beam from one of the generating means may substantially not enter the other generating means.

    摘要翻译: 投影仪具有用于提供第一和第二辐射束的装置,第一图像产生装置,用于单独调制第一辐射束的多个部分,并形成偏转光束和非偏转光束以产生第一图像;第二图像产生装置, 单独地调制第二辐射束的多个部分并形成偏转光束和非偏转光束以产生第二图像;以及用于通过使用偏转光束之一将第一和第二图像投影到预定平面上的装置 以及来自第一和第二图像产生装置的非偏转光束,第一和第二图像产生装置发射偏转的光束,使得来自发生装置之一的偏转光束的大部分基本上不能进入另一个发生装置。

    Method for mass-producing eccentric Fresnel lens sheets
    14.
    发明授权
    Method for mass-producing eccentric Fresnel lens sheets 失效
    批量生产偏心菲涅耳透镜片的方法

    公开(公告)号:US5690772A

    公开(公告)日:1997-11-25

    申请号:US268870

    申请日:1994-06-30

    IPC分类号: G03B21/62 G02B3/08 B32B31/00

    摘要: A method for mass-producing eccentric Fresnel lens sheets comprising the steps of: preparing a number of concentric Fresnel lens sheets; dividing the concentric Fresnel lens sheets into a first set and a second set each including a plurality of Fresnel lens sheets; cutting out a plurality of first sheets each corresponding to one portion of the eccentric Fresnel lens sheet from each of the Fresnel lens sheets of the first set; cutting out a plurality of second sheets each corresponding to the other portion of the eccentric Fresnel lens sheet from each of the Fresnel lens sheets of the second set; and bonding each of the first sheets and each of the second sheets in such a manner that patterns on the first sheet and the second sheet are continuous to prepare a plurality of eccentric Fresnel lens sheet. The second set can include a third set and a fourth set and a plurality of third sheets are cut out from the third set and a plurality of fourth sheets are cut out from the fourth set. The third sheets and fourth sheets are bonded to the first sheets. The first sheets are relatively large rectangular sheets and the second sheets are small rectangular sheets.

    摘要翻译: 一种批量生产偏心菲涅耳透镜片的方法,包括以下步骤:制备多个同心的菲涅尔透镜片; 将同心菲涅耳透镜片分成第一组和第二组,每组包括多个菲涅尔透镜片; 从第一组的菲涅耳透镜片中的每一个切出与偏心菲涅尔透镜片的一部分相对应的多个第一片; 从第二组的菲涅耳透镜片中的每一个切出与偏心菲涅耳透镜片的另一部分相对应的多个第二片; 并且以使得第一片材和第二片材上的图案连续的方式接合每个第一片材和每个第二片材以制备多个偏心菲涅尔透镜片材。 第二组可以包括第三组和第四组,并且从第三组切出多个第三片,并且从第四组切出多个第四片。 第三片和第四片结合到第一片。 第一片是相对大的矩形片,第二片是小矩形片。

    Screen and image display apparatus
    17.
    发明授权
    Screen and image display apparatus 失效
    屏幕和图像显示装置

    公开(公告)号:US5100222A

    公开(公告)日:1992-03-31

    申请号:US559371

    申请日:1990-07-27

    IPC分类号: G03B21/62

    CPC分类号: G03B21/625

    摘要: A screen is disposed in the position at which an image is formed by an image projector. The screen comprises a transparent sheet having a longitudinal direction and a latitudinal direction, and a fresnel lens surface formed on one surface of the transparent sheet to condense a light beam entered thereinto and emit the condensed light beam, the focal length of the Fresnel lens surface in the longitudinal direction of said transparent sheet being shorter than that in the latitudinal direction of the sheet.

    摘要翻译: 屏幕被布置在由图像投影仪形成图像的位置。 屏幕包括具有纵向方向和纬向的透明片,以及形成在透明片的一个表面上的菲涅尔透镜表面,以冷凝入射到其中的光束并发射聚光束,菲涅尔透镜表面的焦距 在所述透明片的长度方向上比片材的纬向短。

    Method of driving ferroelectric liquid crystal element
    18.
    发明授权
    Method of driving ferroelectric liquid crystal element 失效
    铁电液晶元件的驱动方法

    公开(公告)号:US5227900A

    公开(公告)日:1993-07-13

    申请号:US671449

    申请日:1991-03-19

    IPC分类号: G09G3/20 G09G3/36

    摘要: A method of driving a liquid crystal display element in which a switching element is provided for each of pixel electrodes arranged in a matrix manner and a ferroelectric liquid crystal is sandwiched between the pixel electrodes and a counter electrode includes the steps of applying a reset voltage for resetting the entire pixel to a first stable state of the ferroelectric liquid crystal across the pixel electrode and the counter electrode, partially transiting the pixel to a second stable state by a tone signal voltage having a pole opposite to that of the reset voltage, and reversing the pole of the reset voltage every predetermined period. Assuming that a state reverse ratio of the ferroelectric liquid crystal is T(V)% when the tone signal voltage is V, a tone signal voltage V.sub.1 after negative resetting and a corresponding tone signal voltage -V.sub.2 after positive resetting satisfy the following relation:T(V.sub.1)+T(V.sub.2)=100

    摘要翻译: 一种液晶显示元件的驱动方法,其中,对于以矩阵方式布置的每个像素电极和设置有用于形成像素电极和对电极的铁电液晶的开关元件,包括以下步骤: 将整个像素复位到跨越像素电极和对电极的铁电液晶的第一稳定状态,通过具有与复位电压相反的极点的音调信号电压部分地将像素转移到第二稳定状态,并且反转 每个预定周期的复位电压的极点。 假设当音调信号电压为V时铁电液晶的状态反向比为T(V)%,负复位后的音调信号电压V1和正复位之后的对应音调信号电压-V2满足以下关系:T (V1)+ T(V2)= 100