Patents by Inventor Kazuharu Morita
Kazuharu Morita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 5425897Abstract: A liquid-crystalline copolymer comprising the repeating units represented by the following general formulas ##STR1## wherein each of r and p is an integer of 2 to 5, q is an integer of 0 to 3, m is an integer of 1 to 20, and R.sup.1 is ##STR2## R.sup.2 being --COOR.sup.3, --OR.sup.3 or --OCOR.sup.3, R.sup.3 being ##STR3## each of R.sup.4 and R.sup.5 being --CH.sub.3 or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R.sup.5 is --CH.sub.3, the repeating units [I] and [II] being present in the liquid-crystalline copolymer in a substantial molar ratio [I]:[II] of 1:1, exhibits ferroelectricity even at a temperature neighboring room temperature and having a high response speed to changes of external electric fields.Type: GrantFiled: August 26, 1994Date of Patent: June 20, 1995Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kazuharu Morita, Satoshi Hachiya, Fumio Moriwaki, Hiroyuki Endo
-
Patent number: 5380915Abstract: A liquid-crystalline copolymer comprising the repeating units represented by the following general formulas ##STR1## wherein each of r and p is an integer of 2 to 5, q is an integer of 0 to 3, m is an integer of 1 to 20, and R.sup.1 is ##STR2## R.sup.2 being --COOR.sup.3, --OR.sup.3 or --OCOR.sup.3 R.sup.3, ##STR3## each of R.sup.4 and R.sup.5 being --CH.sub.3 or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R.sup.5 is --CH.sub.3, the repeating units [I] and [II] being present in the liquid-crystalline copolymer in a substantial molar ratio [I]:[II] of 1:1, exhibits ferroelectricity even at a temperature neighboring room temperature and having a high response speed to changes of external electric fields.Type: GrantFiled: May 26, 1993Date of Patent: January 10, 1995Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kazuharu Morita, Satoshi Hachiya, Fumio Moriwaki, Hiroyuki Endo
-
Patent number: 5332521Abstract: A ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material;a liquid crystal optical device comprising a layer of the ferroelectric liquid crystal composition, the (A) ferroelectric liquid crystal material in the ferroelectric liquid crystal composition has been uniaxially oriented and two substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, at least one of the electrode layers being a transparent electrode layer; and p1 a method of producing the liquid crystal optical device, which method comprises orienting a liquid crystal optical device yet to be oriented which includes a layer of the ferroelectric liquid crystal composition andtwo flexible substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respectivType: GrantFiled: December 3, 1992Date of Patent: July 26, 1994Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kimihiro Yuasa, Satoshi Hachiya, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 5281685Abstract: A liquid-crystalline copolymer comprising the repeating units represented by the following general formulas ##STR1## wherein each of r and p is an integer of 2 to 5, q is an integer of 0 to 3, m is an integer of 1 to 20, and R.sup.1 is ##STR2## R.sup.2 being --COOR.sup.3, --OR.sup.3 or --OCOR.sup.3, R.sup.3 being ##STR3## each of R.sup.4 and R.sup.5 being --CH.sub.3 or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R.sup.5 is --CH.sub.3,the repeating units [I] and [II] being present in the liquid-crystalline copolymer in a substantial molar ratio [I]:[II] of 1:1, exhibits ferroelectricity even at a temperature neighboring room temperature and having a high response speed to changes of external electric fields.Type: GrantFiled: March 5, 1992Date of Patent: January 25, 1994Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kazuharu Morita, Satoshi Hachiya, Fumio Moriwaki, Hiroyuki Endo
-
Patent number: 5271866Abstract: A liquid-crystalline polymer composition comprising a ferroelectric liquid-crystalline polymer and a low molecular weight liquid-crystalline compound which exhibits smectic C phase or chiral smectic C phase. Such liquid-crystalline polymer compositions have not only excellent moldabilities such as ease of orientation, but also exhibit chiral smectic C phase at wide temperature range within room temperatures and exhibit high speed response to changes of external fields and high contrast ratios when they are used for optical display elements.Type: GrantFiled: May 21, 1991Date of Patent: December 21, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shunji Uchida, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 5269963Abstract: A liquid-crystalline polymer composition comprising a ferroelectric liquid-crystalline polymer and a low molecular weight liquid-crystalline compound which exhibits smectic C phase or chiral smectic C phase. Such liquid-crystalline polymer compositions have not only excellent moldabilities such as ease of orientation, but also exhibit chiral smectic C phase at wide temperature range within room temperatures and exhibit high speed response to changes of external fields and high contrast ratios when they are used for optical display elements.Type: GrantFiled: March 18, 1993Date of Patent: December 14, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shunji Uchida, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 5200108Abstract: A ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material;a liquid crystal optical device comprisinga layer of the ferroelectric liquid crystal composition, the (A) ferroelectric liquid crystal material in the ferroelectric liquid crystal composition has been uniaxially oriented andtwo substrates whichsupport the layer of the ferroelectric liquid crystal composition between them andcarry on their surfaces facing each other their respective electrode layers, at least one of the electrode layers being a transparent electrode layer; anda method of producing the liquid crystal optical device, which method comprises orienting a liquid crystal optical device yet to be oriented which includesa layer of the ferroelectric liquid crystal composition andtwo flexible substrates whichsupport the layer of the ferroelectric liquid crystal composition between them andcarry on their surface facing each other their respective electrodeType: GrantFiled: July 25, 1989Date of Patent: April 6, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kimihiro Yuasa, Satoshi Hachiya, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 5034153Abstract: A liquid-crystalline polymer composition comprising a ferroelectric liquid-crystalline polymer and a low molecular weight liquid-crystalline compound which exhibits smectic C phase or chiral smectic C phase. Such liquid-crystalline polymer compositions have not only excellent moldabilities such as ease of orientation, but also exhibit chiral smectic C phase at wide temperature range within room temperatures and exhibit high speed response to changes of external fields and high contrast ratios when they are used for optical display elements.Type: GrantFiled: September 4, 1990Date of Patent: July 23, 1991Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shunji Uchida, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 4988460Abstract: The liquid-crystalline polymeric composition of the invention comprises (A) a non-liquid-crystalline polymeric compound and (B) a low-molecular liquid-crystalline compound each having a proton donor and/or a proton acceptor in the molecular structure and the low-molecular compound has a chiral smectic C phase. By virtue of these functional groups forming hydrogen bonds between the components, the liquid-crystalline polymeric composition of the invention is not a mere blend of the components liable to cause phase separation but is imparted with greatly increased stability and uniformity of the blend as well as responsivity of high speed.Type: GrantFiled: June 13, 1990Date of Patent: January 29, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Kazuharu Morita, Shunji Uchida, Kimihiro Yuasa
-
Patent number: 4915867Abstract: This invention comprises a liquid crystalline high molecular weight polymer material which comprises the hydrogen bonded reaction product of a non-liquid crystalline polymer having a proton donor and/or a proton acceptor and a low molecular weight compound having bonded in the molecule respectively a proton acceptor and/or a proton donor which can be bond to said proton donor and/or proton acceptor respectively through hydrogen bonding and having liquid crystallinity. This material forms a smectic phase at a lower temperature than a simple mixture and has usefulness in the field of optical electronics.Type: GrantFiled: March 17, 1988Date of Patent: April 10, 1990Assignee: Idemtsu Kosan Company LimitedInventors: Kazuharu Morita, Satoshi Hachiya
-
Patent number: 4913839Abstract: A ferroelectric liquid crystal polymer comprising the recurring units represented by the following general formula: ##STR1## in which k is an integer of from 1 to 30,R.sub.1 is ##STR2## R.sub.2 is --COOR.sub.3, --OCOR.sub.3, --OR.sub.3, or --R.sub.3, in whichR.sub.3 is ##STR3## R.sub.4 is --CH.sub.3 or Cl, m is 0 or an integar of from 1 to 10,n is 0 or an integar of from 1 to 10, providing that n is not 0, when R.sub.4 is --CH.sub.3.The ferroelectric liquid crystal polymer of the present invention not only exhibits a ferroelectricity even at temperatures in the vicinity of a room temperature, but also has so fast response speed to the external factors as to be able to display motion pictures, and may be advantageously used as display elements for large size screens and a curved screens.Type: GrantFiled: April 18, 1989Date of Patent: April 3, 1990Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shunji Uchida, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 4904065Abstract: A liquid crystal optical element comprising: (a) an oriented ferroelectric liquid-crystalline polymer layer which exhibits chiral smectic C phase, and (b) two electrically conducting layers which support the oriented ferroelectric liquid-crystalline polymer layer between them, where at least one of the two electrically conducting layers is transparent. The liquid crystal optical element can be easily made into one having a large area and can be used as a flexible display screen. Further, it has excellent electric field response property and high contrast. Furthermore, the production of the liquid crystal optical element and the control of its thickness can be easily conducted.Type: GrantFiled: June 22, 1988Date of Patent: February 27, 1990Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kimihiro Yuasa, Kenji Hashimoto, Shunji Uchida, Kazuharu Morita, Satoshi Hachiya
-
Patent number: 4844835Abstract: A ferroelectric liquid crystal polymer comprising the recurring units represented by the following general formula: ##STR1## in which k is an integer of from 1 to 30, R.sub.1 is ##STR2## R.sub.2 is --COOR.sub.3, --OCOR.sub.3, --OR.sub.3, or --R.sub.3, in which R.sub.3 is ##STR3## R.sub.4 is --CH.sub.3 or Cl, m is 0 or an integer of from 1 to 10,n is 0 or an integer of from 1 to 10, providing that n is not 0, when R.sub.4 is --CH.sub.3.The ferroelectric liquid crystal polymer of the present invention not only exhibits a ferroelectricity even at temperatures in the vicinity of a room temperature, but also has so fast response speed to the external factors as to be able to display motion pictures, and may be advantageously used as display elements for large size screens and curved screens.Type: GrantFiled: December 22, 1986Date of Patent: July 4, 1989Assignee: Idenitsu Kosan Co., Ltd.Inventors: Shunji Uchida, Kazuharu Morita, Kenji Hashimoto
-
Patent number: 4818807Abstract: A liquid-crystalline polymer comprising repeating units of the following general formula ##STR1## wherein: R.sup.1 is --H, --CH.sub.3 or --C.sub.2 H.sub.5,1 is an integer having a value of 1 to 20,k is an integer having a value of 1 to 30,A is --O-- (oxygen) or --COO--,m is 0 or 1, andR.sup.2 is ##STR2## wherein Y is --COO-- or --OCO--, and R.sup.3 is --COOR.sup.4, --OCOR.sup.4, --OR.sup.4, --COR.sup.4 or --R.sup.4 whereR.sup.4 is ##STR3## R.sup.5 being --CH.sub.3, --CN or a halogen radical, n and p being independently an integer having a value of 0 to 10 with the proviso that if R.sup.5 is --CH.sub.3, p is not 0, X being a halogen radical, q being 0 or 1, and C* being an asymmetric carbon atom.Type: GrantFiled: September 3, 1987Date of Patent: April 4, 1989Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kazuharu Morita, Shunji Uchida, Satoshi Hachiya
-
Patent number: D256953Type: GrantFiled: January 6, 1978Date of Patent: September 16, 1980Assignee: Rainbow Metal Co., Ltd.Inventor: Kazuharu Morita
-
Patent number: D256954Type: GrantFiled: January 6, 1978Date of Patent: September 16, 1980Assignee: Rainbow Metal Co., Ltd.Inventor: Kazuharu Morita