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公开(公告)号：GB2183054B
公开(公告)日：1990-02-07
申请号：GB8621326
申请日：1986-09-04
Applicant: CANON KK
Inventor： TSUBOYAMA AKIRA , INABA YUTAKA , KITAYAMA HIROYUKI , OKADA SHINJIRO , TANIGUCHI OSAMU , KAWAGISHI HIDEYUKI , HANYU YUKIO
IPC: G02F1/1337 , G02F1/141 , G09G3/36 , G02F1/137
Abstract: A ferroelectric liquid crystal device comprising a pair of substrates each provided with an electrode thereon, and a ferroelectric liquid crystal layer disposed between the substrates in a thickness which is thin enough to release the spiral structure of the ferroelectric liquid crystal, wherein the ferroelectric liquid crystal provides two average molecular axis directions forming an angle 2 theta therebetween, each average molecular axis direction corresponding to one or two stable orientation states of the ferroelectric liquid crystal, the ferroelectric liquid crystal provides two average molecular axis directions forming an angle 2 &cir& H therebetween when voltages exceeding the threshold voltage of the ferroelectric liquid crystal are applied to the ferroelectric liquid crystal, and the ferroelectric liquid crystal provides two average molecular directions forming an angle 2 theta a therebetween after applying an alternating electric field to the ferroelectric liquid crystal and removing the electric field, the angles theta , &cir& H and theta a satisfying the relationships of: theta
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公开(公告)号：DE3630012A1
公开(公告)日：1987-04-23
申请号：DE3630012
申请日：1986-09-03
Applicant: CANON KK
Inventor： TSUBOYAMA AKIRA , INABA YUTAKA , KITAYAMA HIROYUKI , OKADA SHINJIRO , TANIGUCHI OSAMU , KAWAGISHI HIDEYUKI , HANYU YUKIO
IPC: G02F1/1337 , G02F1/141 , G09G3/36 , G02F1/137 , G09G3/18
Abstract: A ferroelectric liquid crystal device comprising a pair of substrates each provided with an electrode thereon, and a ferroelectric liquid crystal layer disposed between the substrates in a thickness which is thin enough to release the spiral structure of the ferroelectric liquid crystal, wherein the ferroelectric liquid crystal provides two average molecular axis directions forming an angle 2 theta therebetween, each average molecular axis direction corresponding to one or two stable orientation states of the ferroelectric liquid crystal, the ferroelectric liquid crystal provides two average molecular axis directions forming an angle 2 &cir& H therebetween when voltages exceeding the threshold voltage of the ferroelectric liquid crystal are applied to the ferroelectric liquid crystal, and the ferroelectric liquid crystal provides two average molecular directions forming an angle 2 theta a therebetween after applying an alternating electric field to the ferroelectric liquid crystal and removing the electric field, the angles theta , &cir& H and theta a satisfying the relationships of: theta
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公开(公告)号：FR2584845A1
公开(公告)日：1987-01-16
申请号：FR8610203
申请日：1986-07-11
Applicant: CANON KK
Inventor： OKADA SHINJIRO , TAKAHASHI TOHRU , KAWAGISHI HIDEYUKI , INABA YUTAKA , TANIGUCHI OSAMU , KANAGAWA-KEN
IPC: G02F1/13357 , G09G3/34 , G09G3/36 , C09K19/00 , G09F9/35
Abstract: A liquid crystal apparatus, comprising a liquid crystal panel comprising a plurality of scanning lines, and a plurality of picture elements disposed along each of the scanning lines and comprising a ferroelectric liquid crystal; a backlight disposed behind the liquid crystal panel for illuminating the liquid crystal panel, the backlight changing the light quantity emitted therefrom with the elapse of time. The liquid crystal apparatus is so driven that the low level of the light quantity of the backlight is synchronized with a time when a writing signal is applied to picture elements on at least one scanning line.
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公开(公告)号：DE69424383D1
公开(公告)日：2000-06-15
申请号：DE69424383
申请日：1994-12-13
Applicant: CANON KK
Inventor： KATAKURA KAZUNORI , INABA YUTAKA
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.
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公开(公告)号：AT193780T
公开(公告)日：2000-06-15
申请号：AT95120037
申请日：1989-10-25
Applicant: CANON KK
Inventor： KURIBAYASHI MASAKI , FUTAMI YUKIKO , INOUE HIROSHI , TSUBOYAMA AKIRA , INABA YUTAKA
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.
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Patent Agency Ranking
公开(公告)号：AT181613T
公开(公告)日：1999-07-15
申请号：AT94303035
申请日：1994-04-27
Applicant: CANON KK
Inventor： OKADA SHINJIRO , KANEKO SHUZO , INABA YUTAKA , SHINJO KATSUHIKO , MIYATA HIROKATSU , KATAKURA KAZUNORI
IPC: G09G3/20 , G09G3/36 , G02F1/1337
Abstract: A liquid crystal display device having a matrix of pixels in driven for gradational display with better temperature compensation and better flicker suppression by a driving method, wherein (a) a first voltage signal is applied to a pixel on a selected scanning line, the first voltage signal including a clear pulse, a writing pulse of a polarity opposite to that of the clear pulse and a correction pulse of a polarity opposite to that of the writing pulse, (b) a second voltage signal is applied to an associated pixel on a subsequent scanning line, the second voltage signal including a clear pulse, a writing pulse and a correction pulse of which polarities are respectively opposite to corresponding pulses of the first voltage signal, and (c) the correction pulse applied to the pixel on the selected scanning line is determined based on gradation data for the associated pixel on the subsequent scanning line, and the writing pulse applied to the pixel on the selected scanning line is determined based on gradation data for the pixel on the selected scanning line and the above-determined correction pulse.
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公开(公告)号：AT180580T
公开(公告)日：1999-06-15
申请号：AT91103125
申请日：1991-03-01
Applicant: CANON KK
Inventor： HANYU YUKIO , INABA YUTAKA , ASAOKA MASANOBU , TANIGUCHI OSAMU , SHINJO KENJI , UCHIMI TOSHIHARU
IPC: G02F1/1337 , G02F1/141 , G09G3/36 , G02F1/137
Abstract: A ferroelectric liquid crystal element comprises a ferroelectric liquid crystal and a pair of substantially parallel substrates having opposite surfaces between which the ferroelectric liquid crystal is sealed. The substrates are provided with electrodes to which voltages are applied, and are subjected to one axis parallel orientation treatment (A) so as to orient the ferroelectric liquid crystal. The ferroelectric liquid crystal shows a Chevron layer structure. The pretilt angle alpha of the liquid crystal to the orientation film is in the range 12 DEG -30 DEG , whereby a stable C1U orientation state is obtained at 90% density or more.
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公开(公告)号：DE69228956D1
公开(公告)日：1999-05-27
申请号：DE69228956
申请日：1992-01-07
Applicant: CANON KK
Inventor： INABA YUTAKA , OKADA SHINJIRO , TANIGUCHI OSAMU , MIZUNO HIRONOBU
Abstract: In a ferroelectric liquid crystal element, which is constituted by holding a chiral smectic liquid crystal exhibiting ferroelectricity between electrode substrates, and in which the liquid crystal presents a plurality of surface stabilization states according to an electric field applied through the electrode substrates, and an alternating electric field having a strength equal to or higher than a constant value is applied during a period for inhibiting transition of the surface stabilization state, and to a corresponding liquid crystal portion, within a range causing no transition, the strength of the alternating electric field to be applied during the period for inhibiting transition of the surface stabilization state, and to the corresponding liquid crystal portion is set to be equal to or lower than a predetermined value which does not cause the liquid crystal to flow.
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公开(公告)号：AT166978T
公开(公告)日：1998-06-15
申请号：AT93116808
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.
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公开(公告)号：DE69315515D1
公开(公告)日：1998-01-15
申请号：DE69315515
申请日：1993-07-14
Applicant: CANON KK
Inventor： INABA YUTAKA
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