Lee C Huang, 44Belmont, CA

6493139, Dec 10, 2002

Mar 16, 2001

09/811138

Hongdu Liu - Fremont CA, 94539
Daxin Liu - Mountain View CA, 94043
Shizhuo Yin - Fremont CA, 94536
Lee Lisheng Huang - Sunnyvale CA, 94087

G02B 2728

359484, 359256, 359320, 359301, 359117, 359127, 385 16, 385 17

The present invention relates to optical switches in which switching occurs by changing the rotation of the plane of polarization by application of an externally applied control signal, particularly to magneto-optical switches controlling the port by which light emerges from the switch by externally-applied magnetic fields. The switches of the present invention function for randomly polarized input light, producing similarly randomly polarized light at the appropriate output port. Specific embodiments relate to 1Ã2 and 1Ã4 switches in both single pass and dual pass embodiments. Single pass embodiments are switches in which light passes through the optical components in one direction emerging at the appropriate output port depending on the desired switching. Dual pass embodiments are switches in which the light makes a forward and reverse traverse of the switch with total reflection. Dual pass switches typically reduce crosstalk without increasing the size of the switch.

6580546, Jun 17, 2003

Aug 3, 2001

09/922545

Hongdu Liu - Fremont CA
Shizhuo Yin - Fremont CA
Daxin Liu - Mountain View CA
Lee Lisheng Huang - Sunnyvale CA

Primanex - Fremont CA

G02F 109

359280, 359283

The present invention relates to the use of magnetic materials in combination with magneto-optic materials to improve performance of Faraday rotator devices by enhancing the latching capability and reducing the driving current. Semi-hard magnetic materials are advantageously used in connection with some embodiments of the present invention. Placing such semi-hard magnetic materials in proximity with the magneto-optic material enhances latching and reduces the drive current required to cause switching. Encompassing both the magneto-optic material and the semi-hard magnetic material further reduces drive current requirements and enhances latching by reducing leakage of the magnetic field from its generation within the coil to the magneto-optic material. Some embodiments further include soft or semi-hard material encompassing the coil.

6631238, Oct 7, 2003

Mar 16, 2001

09/810851

Hongdu Liu - Fremont CA
Daxin Liu - Mountain View CA
Shizhuo Yin - Fremont CA
Lee Lisheng Huang - Sunnyvale CA

Primanex Corporation - Fremont CA

G02B 2728

385140, 359494, 359497

Randomly polarized light impinges upon a birefringent crystal, is split into orthogonal polarization components and emerges from the crystal separated by a walk-off distance. The light beams then impinge on polarization rotators that cause a rotation of the plane of polarization by +45Â and -45Â. The light then encounters a variable polarization rotator in which the plane of polarization is rotated through a angle that varies in response to an externally-applied control signal. The maximum operating range (0 to 100% attenuation) is achieved when the variable rotator is capable of rotations in the range Â45Â. A second birefringent crystal functions as a beam displacer. The beams encounter two wave plates configured to produce rotation angles of 0Â and 90Â followed by a retroreflector. The reverse traverse of the attenuator causes the light to emerge at an output port attenuated in intensity.

7171064, Jan 30, 2007

May 5, 2003

10/429480

Michael J. Brinkman - Redwood City CA, US
William K. Bischel - Menlo Park CA, US
Tony Kowalczyk - Palo Alto CA, US
David R. Main - Boulder Creek CA, US
Lee L. Huang - Sunnyvale CA, US

G02F 1/295
G02B 6/26
G02B 6/42

385 5, 385 4, 385 39, 385 40, 385129, 385130, 385132

A thermo-optic switch is operated in a novel near-impulse mode in which the drive pulse width is shorter than twice the diffusion time of the switch. The drive pulse width is less than the rise time of the steady-state optical response and also less than the rise time of the deflection efficiency response to the applied drive pulse. The drive pulse can further include a sustaining segment following the initial short pulse segment, if it is desired to maintain the switch in an ON state for a longer period of time. A number of additional techniques are described for further reducing the response time of the switch. An array of thermo-optic switches operated in this manner can form a display which, due to the fast individual switch rise times, can operate at an overall fast refresh rate.

7436579, Oct 14, 2008

Sep 8, 2006

11/530336

Lee Lisheng Huang - Palo Alto CA, US
Simon John Field - Los Gatos CA, US

Arasor Corporation - Mountain View CA

G02F 1/35

359326, 359332, 385122

Devices and methods are disclosed for realizing a high quality bulk domain grating structure utilizing mobile charges that are generated by means of photo-excitation in a substrate. An effect of light exposure (UV, visible, or a combination of wavelengths) is to generate photo-induced charges. The application of a voltage across the substrate combined with the application of light exposure causes a photo-induced current to flow through the substrate. The photo-induced charges (behaving like virtual electrode inside the material) and the photo-induced current result in both reduction of the coercive field required for domain inversion in the material and improve realization of the domain inversion pattern, which previously has not been possible at room temperature.

7652815, Jan 26, 2010

Feb 20, 2008

12/034138

Lee Lisheng Huang - Palo Alto CA, US
Simon John Field - Los Gatos CA, US

Necsel Intellectual Property, Inc. - Santa Clara CA

G02F 1/35

359326, 359332

Devices and methods are disclosed for realizing a high quality bulk domain grating structure utilizing mobile charges that are generated by means of photo-excitation in a substrate. An effect of light exposure (UV, visible, or a combination of wavelengths) is to generate photo-induced charges. The application of a voltage across the substrate combined with the application of light exposure causes a photo-induced current to flow through the substrate. The photo-induced charges (behaving like virtual electrode inside the material) and the photo-induced current result in both reduction of the coercive field required for domain inversion in the material and improve realization of the domain inversion pattern, which previously has not been possible at room temperature.

7906140, Mar 15, 2011

Jun 16, 2005

11/155262

Philip James Bromley - Fullerton CA, US
Lee Nickols Huang - Diamond Bar CA, US

Virun, Inc. - City of Industry CA

A61K 38/00

424450, 514 2, 514 8

Compositions and methods for mucosal delivery of agents are provided. The compositions are intended for administration to mucosal surface, such as oral and nasal mucosa. The compositions provided contain one or more mucoadhesive proteins and an agent to be delivered. Methods for delivery of agents using the compositions provided herein are also provided.

8037602, Oct 18, 2011

Mar 27, 2009

12/413444

Lee Lisheng Huang - Palo Alto CA, US

Eneron, Inc. - Palo Alto CA

B21D 53/02
B65D 6/28
A47J 27/02

2989003, 220608, 1263901

Techniques for designing and creating energy efficient cookware are provided. In accordance with the techniques cookware can include a cookware base having a cooking surface and heating surface. The heating surface can have a pattern of fins forming heat exchange channels. The fins can effectively increase surface area and the channels can guide thermal energy to the perimeter of the cookware base while the fins absorb the thermal energy. The channel fins can improve energy transfer while providing even distribution throughout the cooking surface. The use of fins can also improve the mechanical strength to the cookware. Methods of making the energy efficient cookware are provided. A piece of cookware with a thick base can be provided by casting and by bonding a metal plate to the cookware body. Within the base, heat exchange channels are created by manufacturing processes such as casting or cutting to improve heat transfer.