Patents by Inventor Antal Jákli
Antal Jákli 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).
-
Publication number: 20240110100Abstract: The present invention relates to a doped ferroelectric nematic liquid crystal having a chirality-induced stabilization of the polar nematic order, improved relaxation time for electro-optical switching, and selective reflection in the visible wavelength that is reversibly tunable. The ferroelectric nematic liquid crystal is doped with a chiral dopant selected from the group benzoic acid, 4-hexyl-,4-[[(1-methylheptyl)oxy]carbonyl]phenyl ester (ZLI811) and BDH1281.Type: ApplicationFiled: September 21, 2022Publication date: April 4, 2024Inventors: Antal Jakli, Chenrun Feng
-
Publication number: 20230389433Abstract: Organic Electrochemical Transistors (OECTs) have the potential to enable fully flexible low-cost electronics. Combining OECTs with ionic electroactive polymers (IEAP) yields a highly sensitive bending sensors with respect to mechanical bending. In comparison the proposed sensor has a sensitivity that is several orders of magnitude larger than conventional electroactive polymers.Type: ApplicationFiled: October 13, 2021Publication date: November 30, 2023Inventors: Vikash KAPHLE, Chathuranga P.H. RAJAPAKSHA, Björn LÜSSEM, Pushpa Raj PAUDEL, Antal JÁKLI, Thein KYU
-
Patent number: 11814562Abstract: An ionic liquid crystal elastomer composition includes a liquid crystal elastomer; and an ionic liquid.Type: GrantFiled: January 11, 2021Date of Patent: November 14, 2023Assignees: KENT STATE UNIVERSITY, THE UNIVERSITY OF AKRONInventors: Antal Jákli, Chenrun Feng, Chathuranga Prageeth Hemantha Rajapaksha, Vikash Kaphle, Thein Kyu
-
Publication number: 20230174864Abstract: The present invention relates to polymer stabilized nematic liquid crystal microlenses. The microlenses can be made from a nematic liquid crystal, a chiral dopant, a reactive monomer, and a photoinitiator. The microlenses can be prepared by spin coating a liquid crystal mixture onto an array including a nickel transmission electron microscope grid. The focal length of the microlens array can be tuned electrically.Type: ApplicationFiled: December 1, 2022Publication date: June 8, 2023Inventors: Antal Jákli, W.S. Kelum Perera
-
Publication number: 20210214613Abstract: An ionic liquid crystal elastomer composition includes a liquid crystal elastomer; and an ionic liquid.Type: ApplicationFiled: January 11, 2021Publication date: July 15, 2021Applicants: Kent State University, The University of AkronInventors: Antal Jákli, Chenrun Feng, Chathuranga Prageeth Hemantha Rajapaksha, Vikash Kaphle, Thein Kyu
-
Patent number: 9689793Abstract: Systems and methods for detection of an amphiphile at a liquid crystal interface include the production of circular polarized light. A system 100 for detecting an amphiphile at a liquid crystal interface comprises a source of white collimated light. A circular polarizer is included for circularly polarizing incoming white light. Polarized white light passes through to an LC grid including a suspended LC film and a solution in contact with the LC grid at a surface. A spectrophotometer optically detects the presence of an amphiphile at the surface by determining a change in birefringence exhibited by the suspended LC film. A method for detecting amphiphiles at a liquid crystal water interface comprises shining collimated white light on an LC cell including an LC film, polarizing the white light with a circular polarizer, adding an amphiphile to a solution in contact with the LC film, and optically detecting the presence of the amphiphile by measuring a change in birefringence exhibited by the LC film.Type: GrantFiled: February 13, 2015Date of Patent: June 27, 2017Assignee: KENT STATE UNIVERSITYInventors: Antal Jakli, Elizabeth Mann, Piotr Popov
-
Publication number: 20150233816Abstract: Systems and methods for detection of an amphiphile at a liquid crystal interface include the production of circular polarized light. A system 100 for detecting an amphiphile at a liquid crystal interface comprises a source of white collimated light. A circular polarizer is included for circularly polarizing incoming white light. Polarized white light passes through to an LC grid including a suspended LC film and a solution in contact with the LC grid at a surface. A spectrophotometer optically detects the presence of an amphiphile at the surface by determining a change in birefringence exhibited by the suspended LC film. A method for detecting amphiphiles at a liquid crystal water interface comprises shining collimated white light on an LC cell including an LC film, polarizing the white light with a circular polarizer, adding an amphiphile to a solution in contact with the LC film, and optically detecting the presence of the amphiphile by measuring a change in birefringence exhibited by the LC film.Type: ApplicationFiled: February 13, 2015Publication date: August 20, 2015Applicant: Kent State UniversityInventors: Antal JAKLI, Elizabeth MANN, Piotr POPOV
-
Patent number: 8263029Abstract: The invention provides a simple and cost-effective method for preparing particles such as anisotropic semiconductor nanoparticles (e.g. CdS) and devices thereof. The method comprises (i) dispersing at least part of particle-forming reactants in a self-organized medium such as surfactant-aqueous solution system, and (ii) conducting a particle-forming reaction using the particle-forming reactants dispersed in the self-organized medium under shear condition to form the particles. The anisotropic property of the particles is controlled at least partially by the shear condition. The invention may be used to prepare quantum dots in a liquid crystal, and various devices such as nonlinear optics, optoelectronic devices, and solar cells, among others.Type: GrantFiled: August 25, 2009Date of Patent: September 11, 2012Assignee: Kent State UniversityInventors: Antal Jakli, Stefanie Taushanoff, Mátyás Molnár, Attila Bóta, Erika Kalman, Peter Palinkás, legal representative, Andrea Palinkás, legal representative, Zoltan Varga
-
Publication number: 20120127136Abstract: A display device includes a piezoelectric layer. First electrically conductive electrodes are disposed on both sides of the piezoelectric layer. A bistable liquid crystal layer is disposed adjacent the piezoelectric layer. Second electrically conductive electrodes are disposed on both sides of the liquid crystal layer. The liquid crystal layer can be addressed by electrically addressing the piezoelectric layer causing the piezoelectric layer to move into contact with the liquid crystal layer, changing the brightness of pixels of the liquid crystal layer.Type: ApplicationFiled: August 18, 2011Publication date: May 24, 2012Applicant: KENT DISPLAYS INCORPORATEDInventors: Tod SCHNEIDER, Erica MONTBACH, J. William Doane, Antal JAKLI, John HARDEN
-
Publication number: 20100158790Abstract: The invention provides a simple and cost-effective method for preparing particles such as anisotropic semiconductor nanoparticles (e.g. CdS) and devices thereof. The method comprises (i) dispersing at least part of particle-forming reactants in a self-organized medium such as surfactant-aqueous solution system, and (ii) conducting a particle-forming reaction using the particle-forming reactants dispersed in the self-organized medium under shear condition to form the particles. The anisotropic property of the particles is controlled at least partially by the shear condition. The invention may be used to prepare quantum dots in a liquid crystal, and various devices such as nonlinear optics, optoelectronic devices, and solar cells, among others.Type: ApplicationFiled: August 25, 2009Publication date: June 24, 2010Inventors: Antal Jakli, Stefanie Taushanoff, Mátyás Molnàr, Attila Bóta, Erika Kalman, Zoltan Varga, Peter Palinkás, Andrea Palinkás
-
Patent number: 7692731Abstract: A new way of generating electrical power by changing the dielectric properties of liquid crystals by mechanical means is described. Such a method and device take advantage of the nature of the liquid crystal as the dielectric material in a capacitor. A broad range of materials, including various liquid crystalline materials, as well as additional mechanisms (flexoelectric polarization) to fully exploit the potential of this mechanism may be realized. Applications of this technology may be useful in wearable personal electric generators as well as in noise damping materials/devices, which not only absorb and dissipate sound, but use it to generate electric power.Type: GrantFiled: November 9, 2005Date of Patent: April 6, 2010Assignee: Kent State UniversityInventors: Peter Palffy-Muhoray, Antal Jakli, Bahman Taheri
-
Publication number: 20090218908Abstract: A new way of generating electrical power by changing the dielectric properties of liquid crystals by mechanical means is described. Such a method and device take advantage of the nature of the liquid crystal as the dielectric material in a capacitor. A broad range of materials, including various liquid crystalline materials, as well as additional mechanisms (flexoelectric polarization) to fully exploit the potential of this mechanism may be realized. Applications of this technology may be useful in wearable personal electric generators as well as in noise damping materials/devices, which not only absorb and dissipate sound, but use it to generate electric power.Type: ApplicationFiled: November 9, 2005Publication date: September 3, 2009Inventors: Peter Palffy-Muhoray, Antal Jakli, Bahman Taheri
-
Patent number: 7279570Abstract: Novel nanoscale discotic liquid crystalline porphyrins, methods for their preparation, and device fabrication are disclosed. These compounds are capable of being used as high-efficiency photovoltaic materials, organic semiconducting materials, and organic light emitting materials.Type: GrantFiled: January 4, 2006Date of Patent: October 9, 2007Assignee: Kent State UniversityInventors: Quan Li, Lanfang Li, Antal Jakli, John Harden, Jr.
-
Publication number: 20070151600Abstract: Novel nanoscale discotic liquid crystalline porphyrins, methods for their preparation, and device fabrication are disclosed. These compounds are capable of being used as high-efficiency photovoltaic materials, organic semiconducting materials, and organic light emitting materials.Type: ApplicationFiled: January 4, 2006Publication date: July 5, 2007Inventors: Quan Li, Lanfang Li, Antal Jakli, John Harden
-
Patent number: 6924009Abstract: A liquid crystal device comprising tilted smectic phases of banana-shaped liquid crystal molecules is disclosed. A method for fabricating a light modulating device is also disclosed. The method comprises the steps of providing a pair of substrates with a cell gap therebetween and permanently disposing at least one banana-shaped liquid crystal material into said cell gap. The present invention also provides a method of generating an image, comprising providing a pair of substrates with a cell gap therebetween, providing transparent electrodes on each of the substrates adjacent to the cell gap, disposing at least one banana-shaped liquid crystal material into the cell gap; and applying an electric field across the electrodes. The tilted smectic phases of banana-shaped liquid crystal may be in either a racemic or a chiral state.Type: GrantFiled: October 26, 2001Date of Patent: August 2, 2005Assignee: Kent State UniversityInventors: Antal Jakli, Liang-Chy Chien, Daniel Krüerke, Hans Sawade, Gerd Heppke
-
Publication number: 20040033321Abstract: A liquid crystal device comprising tilted smectic phases of banana-shaped liquid crystal molecules is disclosed. A method for fabricating a light modulating device is also disclosed. The method comprises the steps of providing a pair of substrates with a cell gap therebetween and permanently disposing at least one banana-shaped liquid crystal material into said cell gap. The present invention also provides a method of generating an image, comprising providing a pair of substrates with a cell gap therebetween, providing transparent electrodes on each of the substrates adjacent to the cell gap, disposing at least one banana-shaped liquid crystal material into the cell gap; and applying an electric field across the electrodes. The tilted smectic phases of banana-shaped liquid crystal may be in either a racemic or a chiral state.Type: ApplicationFiled: July 30, 2003Publication date: February 19, 2004Inventors: Antal Jakli, Liang-Chy Chien, Daniel Kruerke, Hans Sawade, Gerd Heppke
-
Patent number: 5368770Abstract: A liquid crystalline paste material is formed by polymerization of a solution containing a mesogenic solvent and monomeric material in bulk. The paste provides an improved method of preparing thin electrically addressable light modulating films by coating the paste onto a suitable substrate.Type: GrantFiled: June 1, 1992Date of Patent: November 29, 1994Assignee: Kent State UniversityInventors: Alfred Saupe, Antal Jakli
-
Patent number: 5315419Abstract: A method for promoting uniform "bookshelf" textures in light modulators using smectic C* liquid crystal is disclosed. The method comprises the steps of confining smectic C* phase liquid crystal between parallel substrates having inner surfaces treated to promote homeotropic alignment of the liquid crystal near the inner surfaces, generating an electric field normal to the inner surfaces of the substrates and biasing the liquid crystal in a direction parallel to the inner surfaces of the substrates to induce the formation of smectic layers normal to the inner surfaces of the substrate. For example, the perturbation may be carried out by supplying a cyclic shear to one of the substrates or by means of a magnetic field parallel to the substrates. Reversal of the polarity of the electric field switches the material between two stable bookshelf textures.Type: GrantFiled: July 23, 1992Date of Patent: May 24, 1994Assignee: Kent State UniversityInventors: Alfred Saupe, Antal Jakli