Patents by Inventor Suk-Won Choi
Suk-Won Choi 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: 7212269Abstract: A ferroelectric liquid crystal display having alignment films with different surface polarities. The alignment films induce an internal electric field through the liquid crystal. Because of the induced internal electric field, initial liquid crystal alignment, and subsequent liquid crystal alignments, can be performed without an externally applied electric field.Type: GrantFiled: July 2, 2004Date of Patent: May 1, 2007Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Patent number: 7187428Abstract: The present invention is related to a method of fabricating a ferroelectric liquid crystal display which prevents problems of injecting liquid crystal that result from a volume shrinking of the liquid crystal during the injection process. In the method, the pressure in a chamber is changed to above a liquid crystal injection pressure, while cooling a liquid crystal panel after injecting the liquid crystal, and at the same time, the temperature of a liquid crystal tray maintained at a liquid crystal injection temperature, to continue injection of the liquid crystal to an otherwise un-injected portion of the liquid crystal panel, so that an problems related to inadequate injection can be prevented.Type: GrantFiled: August 25, 2004Date of Patent: March 6, 2007Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Patent number: 7139063Abstract: In the preferred embodiment of the present invention, a ferroelectric LC layer is formed between first and second substrates of a LC panel. The LC panel is cooled at a low temperature, for example at ?20° C., where the ferroelectric LC maintains a smetic phase. Due to the cooling, molecules are uniformly aligned for their early alignment state.Type: GrantFiled: December 28, 2000Date of Patent: November 21, 2006Assignee: LG. Philips Lcd Co., Ltd.Inventors: Suk-Won Choi, Su-Seok Choi
-
Patent number: 7009677Abstract: A liquid crystal display device having first and second substrates with an interposed liquid crystal layer that has a negative or a positive dielectric anisotropy. First and second electrodes are formed on opposing surfaces of the first and second substrates. A first orientation film comprised of a ferroelectric liquid crystal polymer is formed on the first electrode, and a second orientation film is formed on the second electrode. First and second polarizers are formed on exterior surfaces of the first and second substrates.Type: GrantFiled: February 7, 2005Date of Patent: March 7, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jang-Jin Yoo, Suk-Won Choi, Su-Seok Choi
-
Publication number: 20050134789Abstract: A liquid crystal display device having first and second substrates with an interposed liquid crystal layer that has a negative or a positive dielectric anisotropy. First and second electrodes are formed on opposing surfaces of the first and second substrates. A first orientation film comprised of a ferroelectric liquid crystal polymer is formed on the first electrode, and a second orientation film is formed on the second electrode. First and second polarizers are formed on exterior surfaces of the first and second substrates.Type: ApplicationFiled: February 7, 2005Publication date: June 23, 2005Inventors: Jang-Jin Yoo, Suk-Won Choi, Su-Seok Choi
-
Patent number: 6876430Abstract: A pressure sealing apparatus and method for a ferroelectric liquid crystal display is disclosed for improving an alignment characteristic of a liquid crystal. In the apparatus and method, simultaneously with a pressurization of a liquid crystal display panel into which a liquid crystal has been injected, the liquid crystal display panel is subjected to a temperature treatment along with an application of an electric field.Type: GrantFiled: December 19, 2001Date of Patent: April 5, 2005Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Patent number: 6876425Abstract: A liquid crystal display device having first and second substrates with an interposed liquid crystal layer that has a negative or a positive dielectric anisotropy. First and second electrodes are formed on opposing surfaces of the first and second substrates. A first orientation film comprised of a ferroelectric liquid crystal polymer is formed on the first electrode, and a second orientation film is formed on the second electrode. First and second polarizers are formed on exterior surfaces of the first and second substrates.Type: GrantFiled: December 27, 2000Date of Patent: April 5, 2005Assignee: LG.Philips LCD Co., Ltd.Inventors: Jang-Jin Yoo, Suk-Won Choi, Su-Seok Choi
-
Patent number: 6862048Abstract: A liquid crystal display panel including first and second substrates, and a FLC layer interposed therebetween. A small quantity of additives are mixed in the FLC layer, without changing the electrical or chemical properties of the FLC. Under a proper temperature and an electric field, the FLC layer is ripened sufficiently. Thereafter, the FLC is exposed to light such that polymer networks are formed in the FLC layer due to the polymerization by the additives. The polymer networks connect with each other across molecular layers in the FLC such that the molecules of the FLC are stabilized in proper orientations and maintain their molecular layer structure regardless of the temperature variance. And, the diffraction grating becomes stable regardless of the temperature variance, and fast response time and good gray scale are achieved.Type: GrantFiled: November 19, 2003Date of Patent: March 1, 2005Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk-Won Choi, Hyung-Ki Hong
-
Patent number: 6822722Abstract: A liquid crystal display is provided that includes liquid crystal pixel cells arranged at each intersection between a plurality of gate lines and a plurality of data lines, a thin film transistor associated with each pixel cell, a storage capacitor, and a smectic liquid crystal between an upper substrate and a lower substrate. The smectic liquid crystal has spontaneous polarization in a range of approximately 2 nC/cm2 to 100 nC/cm2 and a storage capacitance is in a range of approximately 1 nF/cm2 to 13 nF/cm2 for optimizing transmittance depending on the spontaneous polarization of the smectic liquid crystal.Type: GrantFiled: September 4, 2001Date of Patent: November 23, 2004Assignee: LG.Philips Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Publication number: 20040207776Abstract: A liquid crystal display device, and a method of fabricating such a liquid crystal display device, that uses a ferroelectric liquid crystal (FLC). Additives are added to the ferroelectric liquid crystal. The additives are then used to form polymer networks, beneficially by exposure to ultraviolet light. Suitable additives include an acrylate compound.Type: ApplicationFiled: May 19, 2004Publication date: October 21, 2004Inventors: Suk-Won Choi, Su-Seok Choi
-
Patent number: 6798490Abstract: The present invention is related to a method of fabricating a ferroelectric liquid crystal display which prevents problems of injecting liquid crystal that result from a volume shrinking of the liquid crystal during the injection process. In the method, the pressure in a chamber is changed to above a liquid crystal injection pressure, while cooling a liquid crystal panel after injecting the liquid crystal, and at the same time, the temperature of a liquid crystal tray maintained at a liquid crystal injection temperature, to continue injection of the liquid crystal to an otherwise un-injected portion of the liquid crystal panel, so that an problems related to inadequate injection can be prevented.Type: GrantFiled: December 18, 2001Date of Patent: September 28, 2004Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Patent number: 6768527Abstract: A ferroelectric liquid crystal display and a fabricating method thereof that is capable of maintaining a stable alignment state against external temperature variation and external impact. In the method and apparatus, a ferroelectric liquid crystal containing a small amount of light-hardening polymer is injected between upper and lower substrates provided with alignment film. An ultraviolet ray is irradiated thereon to form a polymer network. The ultraviolet ray has a light intensity range of about 1 to about 5 mW/cm2, and has a light energy range of about 240 to about 1200 mJ/cm2.Type: GrantFiled: December 7, 2001Date of Patent: July 27, 2004Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Patent number: 6760088Abstract: A ferroelectric liquid crystal display having alignment films with different surface polarities. The alignment films induce an internal electric field through the liquid crystal. Because of the induced internal electric field, initial liquid crystal alignment, and subsequent liquid crystal alignments, can be performed without an externally applied electric field.Type: GrantFiled: June 29, 2001Date of Patent: July 6, 2004Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Patent number: 6757035Abstract: A liquid crystal display device, and a method of fabricating such a liquid crystal display device, that uses a ferroelectric liquid crystal (FLC). Additives are added to the ferroelectric liquid crystal. The additives are then used to form polymer networks, beneficially by exposure to ultraviolet light. Suitable additives include an acrylate compound.Type: GrantFiled: December 21, 2000Date of Patent: June 29, 2004Assignee: LG. Philips LCD Co., Ltd.Inventors: Suk-Won Choi, Su-Seok Choi
-
Publication number: 20040100606Abstract: A liquid crystal display panel including first and second substrates, and a FLC layer interposed therebetween. A small quantity of additives are mixed in the FLC layer, without changing the electrical or chemical properties of the FLC. Under a proper temperature and an electric field, the FLC layer is ripened sufficiently. Thereafter, the FLC is exposed to light such that polymer networks are formed in the FLC layer due to the polymerization by the additives. The polymer networks connect with each other across molecular layers in the FLC such that the molecules of the FLC are stabilized in proper orientations and maintain their molecular layer structure regardless of the temperature variance. And, the diffraction grating becomes stable regardless of the temperature variance, and fast response time and good gray scale are achieved.Type: ApplicationFiled: November 19, 2003Publication date: May 27, 2004Inventors: Suk-Won Choi, Hyung-Ki Hong
-
Patent number: 6741317Abstract: A liquid crystal display device includes a thin film transistor substrate, on which a plurality of data lines and gate lines are positioned perpendicular to each other; a plurality of pixel electrodes formed near intersections of the data lines and the gate lines; a color filter substrate positioned parallel to the thin film transistor substrate, including a color filter layer, a black matrix and a common electrode formed thereon; a polymer wall arrangement formed either on the thin film transistor substrate or on the color filter substrate dividing the substrate into a plurality of liquid crystal panels; and at least one liquid crystal injection opening formed on each panel of the plurality of liquid crystal panels.Type: GrantFiled: October 22, 2001Date of Patent: May 25, 2004Assignee: LG. Philips LCD Co., Ltd.Inventors: Su Seok Choi, Suk Won Choi
-
Publication number: 20040085502Abstract: A liquid crystal display includes a liquid crystal injected between upper and lower plates, wherein the upper and lower plates have electrodes respectively formed thereon, an upper alignment film formed on the upper plate and a lower alignment film formed on the lower plate, wherein only one of the alignment films on the upper plate and the lower plate is aligned in to determine an incipient alignment direction of the liquid crystal.Type: ApplicationFiled: August 28, 2003Publication date: May 6, 2004Applicant: LG.PHILIPS LCD CO., LTD.Inventors: Suk Won Choi, Hong Chul Kim
-
Patent number: 6678034Abstract: A liquid crystal display panel including first and second substrates, and a FLC layer interposed therebetween. A small quantity of additives are mixed in the FLC layer, without changing the electrical or chemical properties of the FLC. Under a proper temperature and an electric field, the FLC layer is ripened sufficiently. Thereafter, the FLC is exposed to light such that polymer networks are formed in the FLC layer due to the polymerization by the additives. The polymer networks connect with each other across molecular layers in the FLC such that the molecules of the FLC are stabilized in proper orientations and maintain their molecular layer structure regardless of the temperature variance. And, the diffraction grating becomes stable regardless of the temperature variance, and fast response time and good gray scale are achieved.Type: GrantFiled: December 20, 2000Date of Patent: January 13, 2004Assignee: LG.Philips LCD Co., Ltd.Inventors: Suk-Won Choi, Hyung-Ki Hong
-
Patent number: 6570637Abstract: A liquid crystal display panel employing an in plane switching (IPS) mode wherein an alignment direction of a liquid crystal is moved on a plane parallel to the surface of the panel. In the panel, electrode patterns are formed on each substrate in such a manner to be opposed to each other. A liquid crystal layer is filled between the substrates provided with the electrode patterns. Alignment films are formed on each of the substrates in such a manner to be positioned between the electrode patterns and the liquid crystal layer. The alignment films allow an alignment direction of the liquid crystal layer to be changed on a plane parallel to the surfaces of the substrates by an electric field applied between the electrode patterns.Type: GrantFiled: June 18, 2002Date of Patent: May 27, 2003Assignee: LG. Philips LCD Co., Ltd.Inventors: Suk Won Choi, Su Seok Choi
-
Publication number: 20020159017Abstract: A liquid crystal display panel employing an in plane switching (IPS) mode wherein an alignment direction of a liquid crystal is moved on a plane parallel to the surface of the panel. In the panel, electrode patterns are formed on each substrate in such a manner to be opposed to each other. A liquid crystal layer is filled between the substrates provided with the electrode patterns. Alignment films are formed on each of the substrates in such a manner to be positioned between the electrode patterns and the liquid crystal layer. The alignment films allow an alignment direction of the liquid crystal layer to be changed on a plane parallel to the surfaces of the substrates by an electric field applied between the electrode patterns.Type: ApplicationFiled: June 18, 2002Publication date: October 31, 2002Inventors: Suk Won Choi, Su Seok Choi