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    LIQUID CRYSTAL DISPLAY DEVICE
    4.
    发明专利
    LIQUID CRYSTAL DISPLAY DEVICE 未知

    公开(公告)号：MY8500668A

    公开(公告)日：1985-12-31

    申请号：MY8500668

    申请日：1985-12-30

    Applicant: HITACHI LTD

    Inventor： TANAKA MASASHI ,  NAKAJIMA YUTAKA ,  IHOCHI TAKAHIKO ,  SHIBUVA YOSHIMICHI

    IPC: G02F1/1347 ,  G04G9/00 ,  G09F9/35 ,  G09F9/46 ,  G04G9/12

    Abstract: A liquid crystal display device having a structural arrangement that a plurality of liquid crystal layers each for displaying a pattern are piled up and a pair of polarizers are provided above an uppermost liquid crystal layer and below a lowermost liquid crystal layer, is disclosed in which a polarizer is interposed between adjacent liquid crystal layers in such a manner that adjacent ones of the polarizers are different in direction of transmission axis from each other, in order to eliminate a white on black portion caused by an overlap of the patterns and to thereby reduce the area of a display region; or in which a white on black portion caused by an overlap of the patterns is used as a display portion to form a display pattern having a predetermined shape and to open up new possibilities for color display.

    6.
    发明专利
    未知

    公开(公告)号：DE3110786A1

    公开(公告)日：1981-12-24

    申请号：DE3110786

    申请日：1981-03-19

    Applicant: HITACHI LTD

    Inventor： KUMADA AKIO ,  IHOCHI TAKAHIKO ,  TANAKA MASASHI ,  SUZUKI KAZUMA ,  YOKOSUKA MASARU ,  MIURA SHINSUKE ,  OCHIAI TSUTOMU

    IPC: H04R17/00 ,  C04B35/49 ,  C04B35/491 ,  G04C21/02 ,  G04G13/02 ,  G09F9/30 ,  G10K9/122 ,  G10K13/00 ,  H01L41/187 ,  H03H9/17 ,  H03H9/58 ,  G04C21/00 ,  G04G13/00 ,  H01L41/18 ,  C04B35/48

    Abstract: Disclosed is a transparent piezoelectric transducer comprising, at least, a transparent vibrator and at least one plate of a piezoelectric ceramic material sandwiched between a pair of transparent electrodes, said transparent vibrator being disposed so as to be vibrated by the piezoelectric ceramic material plate, said piezoelectric ceramic material being a ceramic material which is represented by a formula: Pb1-xLax(ZryTiz)1-x/403 where x and y/z are set within a region enclosed with lines successively coupling points a-b-c-d-e-a in a phase diagram (FIG. 2 of the accompanying drawings) in which a ratio (y/z) between PbZrO3 and PbTiO3 is taken on an axis of abscissas, while an La concentration (x) is taken on an axis of ordinates (where x=8.4 and y/z=65/35 at a, x=6 and y/z=55.5/44.5 at b, x=6 and y/z=50/50 at c, x=12 and y/z=50/50 at d, and x=9 and y/z=65/35 at e). The transparent transducer is excellent in both the transparency and the electroacoustic response.

    9.
    发明专利
    未知

    公开(公告)号：DE3039862A1

    公开(公告)日：1981-05-07

    申请号：DE3039862

    申请日：1980-10-22

    Applicant: HITACHI LTD

    Inventor： TANAKA MASASHI ,  NAKAJIMA YUTAKA ,  IHOCHI TAKAHIKO ,  SHIBUYA YOSHIMICHI

    IPC: G02F1/1347 ,  G04G9/00 ,  G09F9/35 ,  G09F9/46

    Abstract: A liquid crystal display device having a structural arrangement that a plurality of liquid crystal layers each for displaying a pattern are piled up and a pair of polarizers are provided above an uppermost liquid crystal layer and below a lowermost liquid crystal layer, is disclosed in which a polarizer is interposed between adjacent liquid crystal layers in such a manner that adjacent ones of the polarizers are different in direction of transmission axis from each other, in order to eliminate a white on black portion caused by an overlap of the patterns and to thereby reduce the area of a display region; or in which a white on black portion caused by an overlap of the patterns is used as a display portion to form a display pattern having a predetermined shape and to open up new possibilities for color display.

    DISPLAY DEVICE STRUCTURE
    10.
    发明专利
    DISPLAY DEVICE STRUCTURE 未知

    公开(公告)号：IN153210B

    公开(公告)日：1984-06-16

    申请号：IN1176CA1980

    申请日：1980-10-15

    Applicant: HITACHI LTD

    Inventor： KUMADA AKIO ,  IHOCHI TAKAHIKO ,  HOMMA MAKOTO ,  TANAKA MASASHI

    IPC: G04G13/02 ,  H04R17/10 ,  G09F27/00 ,  G10K9/12 ,  G10K9/122 ,  G10K13/00 ,  G04C21/00

    Abstract: A display device structure comprising a casing, a display panel placed in the casing, a transparent covering and vibrating plate member on the front side of the display panel and an actuator for the plate member. The covering and vibrating plate member is carried on the casing through an elastic member interposed between the peripheral portion of the plate member and the casing. By this arrangement the plate member is capable of effectively generating sound outward upon reception of vibrating force from the actuator.

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