公开(公告)号：DE69318927D1

公开(公告)日：1998-07-09

申请号：DE69318927

申请日：1993-10-18

Applicant: CANON KK

Inventor： OKADA SHINJIRO ,  INABA YUTAKA ,  KOJIMA MAKOTO ,  KATAKURA KAZUNORI

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1343

Abstract: A liquid crystal display device is constituted by a pair of electrode plates each having a plurality of elongated electrodes, and a layer of ferroelectric liquid crystal disposed between the electrode plates so as to form a pixel at each intersection of elongated electrodes disposed respectively on the pair of electrodes plates. At least one electrode plate is provided with an unevenness at each pixel so as to form a cell thickness gradient ( alpha 1 alpha 2), within each pixel, and at least one electrode plate is provided with at least three types of color filters each corresponding to a pixel. Further, each color filter and/or each pixel (R,G,B) is set to have an area and/or a shape varying depending on a local cell thickness so that light quantities or sensible light quantities transmitted through the respective filters and the liquid crystal layer are identical to each other regardless of the type of color filter. A similar pixel pattern deformation is effective for providing a linear T (transmittance) - log V (voltage) characteristic. Color pixels pattern deformation may preferably be effected in a complementary manner with respect to different colors.

公开(公告)号：AT165474T

公开(公告)日：1998-05-15

申请号：AT92120634

申请日：1992-12-03

Applicant: CANON KK

Inventor： OKADA SHINJIRO ,  INABA YUTAKA ,  KATAKURA KAZUNORI

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: A liquid crystal display apparatus comprising: a liquid crystal cell in which ferroelectric liquid crystal is disposed between two electrode substrates disposed to face each other and an intersection portion between a scanning electrode group and an information electrode group respectively formed on the electrode substrates is made to be a pixel; a scanning signal applying device; and an information signal applying device, wherein the pixel has a threshold distribution with respect to a gradation information signal at the time of a scanning selection operation, the scanning signal applying device simultaneously applies scanning signals to a plurality of scanning electrodes in synchronization with an operation in which the information signal applying device applies the gradation information signal to an information electrode, and the scanning signals applied simultaneously have different waveforms.

公开(公告)号：DE69314921T2

公开(公告)日：1998-03-19

申请号：DE69314921

申请日：1993-12-24

Applicant: CANON KK

Inventor： KATAKURA KAZUNORI ,  OKADA SHINJIRO ,  INABA YUTAKA

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: A display panel includes a matrix of pixels each constituted by a pair of oppositely disposed electrodes and a liquid crystal disposed between the electrodes. A current signal, particularly one associated with inversion of spontaneous polarization of the liquid crystal is detected at plural pixels. The display panel is driven by applying drive signals thereto while correcting the drive signals based on the detected current signal. As a result, a threshold distribution typically attributable to a temperature distribution on the display panel is accurately compensated for. The display system thus constituted is particularly useful for gradational display.

公开(公告)号：AT159831T

公开(公告)日：1997-11-15

申请号：AT93120880

申请日：1993-12-24

Applicant: CANON KK

Inventor： KATAKURA KAZUNORI ,  OKADA SHINJIRO ,  INABA YUTAKA

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: A display panel includes a matrix of pixels each constituted by a pair of oppositely disposed electrodes and a liquid crystal disposed between the electrodes. A current signal, particularly one associated with inversion of spontaneous polarization of the liquid crystal is detected at plural pixels. The display panel is driven by applying drive signals thereto while correcting the drive signals based on the detected current signal. As a result, a threshold distribution typically attributable to a temperature distribution on the display panel is accurately compensated for. The display system thus constituted is particularly useful for gradational display.

公开(公告)号：DE69219644T2

公开(公告)日：1997-11-06

申请号：DE69219644

申请日：1992-02-19

Applicant: CANON KK

Inventor： OKADA SHINJIRO ,  INABA YUTAKA

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36 ,  G02F1/137

Abstract: A ferroelectric liquid crystal apparatus comprising a liquid crystal cell having a ferroelectric liquid crystal carried between electrode substrates, means for producing a voltage signal for writing the information by applying an electric field via the electrode substrate and driving the ferroelectric liquid crystal, wherein voltage signal producing means determines the voltage signal value with reference to the display status of a ferroelectric liquid crystal before writing, in writing the information.

公开(公告)号：DE68926771T2

公开(公告)日：1997-01-09

申请号：DE68926771

申请日：1989-10-25

Applicant: CANON KK

Inventor： KURIBAYASHI MASAKI ,  FUTAMI YUKIKO ,  INOUE HIROSHI ,  TSUBOYAMA AKIRA ,  INABA YUTAKA

IPC: G09G3/20 ,  G09G3/36

Abstract: A liquid crystal apparatus, includes: a) a liquid crystal device comprising an electrode matrix composed of scanning electrodes and data electrodes, and a ferroelectric liquid crystal showing a first and a second orientation state; and b) a driving means including: a first drive means for applying a scanning selection signal to the scanning electrodes two or more scanning electrodes apart in one vertical scanning so as to effect one picture scanning in plural times of vertical scanning, said scanning selection signal having a voltage of one polarity and a voltage of the other polarity with respect to the voltage level of a nonselected scanning electrode, and a second drive means for applying to a selected data electrode a voltage signal which provides a voltage causing the first orientation state of the ferroelectric liquid crystal in combination with the voltage of one polarity of the scanning selection signal, and applying to another data electrode a voltage signal which provides a voltage causing the second orientation state of the ferroelectric liquid crystal in combination with the voltage of the other polarity of the scanning selection signal.

公开(公告)号：DE3854751T2

公开(公告)日：1996-06-13

申请号：DE3854751

申请日：1988-06-13

Applicant: CANON KK

Inventor： TSUBOYAMA AKIRA ,  INABA YUTAKA ,  YOSHIDA AKIO ,  HANYU YUKIO ,  UCHIMI TOSHIHARU ,  YAMASHITA MASATAKA

IPC: C09K19/12 ,  C09K19/20 ,  C09K19/22 ,  C09K19/28 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/46 ,  G02F1/1333 ,  G02F1/141 ,  G02F1/137 ,  C09K19/06

Abstract: A ferroelectric liquid crystal device comprises a pair of opposite electrodes (102a, 102b) and a ferroelectric liquid crystal disposed between the electrodes. At least one of the opposite electrodes (102a, 102b) is coated with an insulating film having a thickness of 200 ANGSTROM or larger. The ferroelectric liquid crystal has a capacitance CLC (nF/cm ) and a spontaneous polarization Ps (nC/cm ) and the insulating film has a capacitance Ci (nF/cm ) satisfying the relationship of Ci(nF/cm ) >/= 2.Ps(nC/cm ) - CLC(nF/cm ).

公开(公告)号：ES2080046T3

公开(公告)日：1996-02-01

申请号：ES88109392

申请日：1988-06-13

Applicant: CANON KK

Inventor： TSUBOYAMA AKIRA ,  INABA YUTAKA ,  YOSHIDA AKIO ,  HANYU YUKIO ,  UCHIMI TOSHIHARU ,  YAMASHITA MASATAKA

IPC: C09K19/12 ,  C09K19/20 ,  C09K19/22 ,  C09K19/28 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/46 ,  G02F1/1333 ,  G02F1/141 ,  G02F1/137 ,  C09K19/06

Abstract: A ferroelectric liquid crystal device comprises a pair of opposite electrodes (102a, 102b) and a ferroelectric liquid crystal disposed between the electrodes. At least one of the opposite electrodes (102a, 102b) is coated with an insulating film having a thickness of 200 ANGSTROM or larger. The ferroelectric liquid crystal has a capacitance CLC (nF/cm ) and a spontaneous polarization Ps (nC/cm ) and the insulating film has a capacitance Ci (nF/cm ) satisfying the relationship of Ci(nF/cm ) >/= 2.Ps(nC/cm ) - CLC(nF/cm ).

公开(公告)号：ES2074493T3

公开(公告)日：1995-09-16

申请号：ES90107631

申请日：1990-04-23

Applicant: CANON KK

Inventor： TANIGUCHI OSAMU ,  TSUBOYAMA AKIRA ,  INABA YUTAKA

IPC: G02F1/133 ,  G09G3/36

公开(公告)号：CA2137723A1

公开(公告)日：1995-06-15

申请号：CA2137723

申请日：1994-12-09

Applicant: CANON KK

Inventor： KATAKURA KAZUNORI ,  INABA YUTAKA

IPC: G09G3/20 ,  G09G3/36 ,  G09G5/00

Abstract: A display apparatus is constituted by a display device comprising a pair of oppositely disposed substrates having thereon scanning electrodes and data electrodes, respectively, and an optical modulation substance disposed between the substrates so as to form a number of pixels each at an intersection of the scanning electrodes and the data electrodes; and drive means capable of setting one frame period to be divided into different periods of sub-frames. The drive means further includes means for setting a whole picture scanning period for scanning all the scanning electrodes and a partial rewrite period for scanning only scanning electrodes for effecting a required display change so as to allow a partial rewrite in a shorter cycle than a frame cycle.