Kam Ming Lau

6449407, Sep 10, 2002

Mar 3, 2000

09/518751

Meng-Hsiung Kiang - Berkeley CA
Behrang Behin - Berkeley CA
Michael Daneman - Pacifica CA
Kam Yin Lau - Danville CA

Orix Microsystems, Inc. - Richmond CA

G02B 635

385 18, 359128, 385 17, 385 24

An optical switch module having a movable mirror disposed between two fixed mirrors. All three mirrors are aligned parallel to each other in a linear array to form a crossbar switch. The movable mirror moves between a first position and a second position to selectively couple optical signals between two inputs and two outputs. The basic switch module may be scaled up to form an apparatus that incorporates N movable mirrors and N+1 fixed mirrors, where N is an integer greater than zero. Such an apparatus can accommodate 2N fiber inputs and 2N fiber outputs, e. g. , in an optical add/drop multiplexer (OADM). The parallel configuration of the switch module takes advantage of existing lens array and fiber V-groove technology to facilitate integration of the fibers and collimators in the module, thereby reducing the difficulty and cost associated with alignment, assembly, and packaging.

6473544, Oct 29, 2002

Mar 3, 2000

09/518754

Michael Daneman - Pacifica CA
Behrang Behin - Berkeley CA
Meng-Hsiung Kiang - Berkeley CA
Kam Yin Lau - Danville CA

Onix Microsystems, Inc. - Richmond CA

G02B 626

385 17, 385 16

An optical crossbar switch having refractive or reflective components for equalizing beam spreading and diffraction in all the connections. The optical fibers or waveguides coupled to the switch are not staggered, but are parallel as in a conventional fiber array. The refractive component is disposed between the switch and the input optical fibers. Preferably, a similar refractive component is disposed between the output optical fibers and the switch. The refractive component can be a stairstep block made of glass, silicon or silica. Light from each input fiber travels through a well-defined thickness of the stairstep block. Since the block has a refractive index greater than the surrounding atmosphere, the wavelength in reduced within the block, and beam spreading and diffraction are reduced.

6690657, Feb 10, 2004

Feb 25, 2000

09/513367

Kam Y. Lau - Danville CA
Iason Vassiliou - Berkeley CA
Mahesh Venkatraman - Redwood City CA

Berkeley Concept Research Corporation - San Jose CA
Kawasaki Microelectronics, Inc. - Chiba

H04J 100

370315, 370319

A multichannel distributed wireless repeater network, methods for its operation, and system components are disclosed. The network is designed to facilitate high-bit-rate data communication within a home, office, or similarly constrained area. According to the described embodiments, RF radiation outside of the desired network area can be minimized by use of low power transmitter and repeaters, while short paths and uniform signal strength within the network area predominate, facilitating high bit rates. The network utilizes low-power RF transmitters that generally have insufficient power to reliably span the entire network of receivers. To provide uniform coverage throughout the network, channel-shifting repeaters are used. These repeaters pick up a transmitted (or retransmitted) signal on one channel, shift it to a substantially non-interfering channel, and retransmit the signal. The receivers can preferably receive signals on the best available channel, whether it be the original channel or a repeating channel.

6897539, May 24, 2005

Apr 12, 2002

10/122451

Behrang Behin - Berkeley CA, US
Kam Yin Lau - Danville CA, US
Richard S. Muller - Kensington CA, US

The Regents of the University of California - Oakland CA

H01L031/00

257444, 257434, 257435, 257436, 257443, 257462

Methods for directing an optical beam and for making an apparatus for directing an optical beam are described. One such method may include applying a first force to a plate to move the plate from a first angular orientation to a second angular orientation wherein the plate contacts a stop in the second angular orientation. A second force can be applied between the plate and the stop to hold the plate against the stop in a plane substantially parallel to a substantially planar surface of the stop. An apparatus for directing an optical beam may be made by coupling an array of plates to a base assembly wherein each plate is movable between a first angular orientation and a second angular orientation. An array of apertures may be formed in a stop assembly wherein the stop assembly is coupled to the base assembly and each aperture is positioned to contact its respective plate when the plate is in a second angular orientation.

6962830, Nov 8, 2005

Feb 23, 2000

09/511428

Behrang Behin - Berkeley CA, US
Kam Yin Lau - Danville CA, US
Richard S. Muller - Kensington CA, US

The Regents of the University of California - Oakland CA

H01L021/00

438 50, 438 52, 257443, 257444, 257462

Microstructure apparatus and methods are described. An exemplary movable microstructure apparatus includes a base, a plate, and a stop. The plate may be coupled to the base through a flexure, so that the plate is movable between a first angular orientation and a second angular orientation. The stop may be configured to contact the bottom portion of the plate in a contact area when the plate is in the second angular orientation. Alternatively, the stop may be configured to contact the plate in a contact area sized so that upon application of an electrostatic bias between the plate and the stop, a sufficient force holds the plate against the stop. Alternatively, the stop may have a substantially planar surface configured to contact the plate in a contact area sized so that, upon application of a force to the plate substantially normal to the substantially planar surface of the stop, a sufficient force holds the plate against the stop such that the plate lies in a plane substantially parallel to the substantially planar surface of the stop.

7301177, Nov 27, 2007

May 14, 2004

10/846137

Behrang Behin - Berkeley CA, US
Kam Yin Lau - Danville CA, US
Richard S. Muller - Kensington CA, US

The Regents of the University of California - Oakland CA

H01L 29/74

257108, 257415, 257428, 257432, 257433, 257443

Methods for directing an optical beam and for making an apparatus for directing an optical beam are described. One such method may include applying a first force to a plate to move the plate from a first angular orientation to a second angular orientation wherein the plate contacts a stop in the second angular orientation. A reflective portion of the plate is stopped from rotating beyond the second angular orientation. A second force can be applied between the plate and the stop to hold the plate against the stop in a plane substantially parallel to a substantially planar surface of the stop. An apparatus for directing an optical beam may be made by coupling an array of plates to a base assembly wherein each plate is movable between a first angular orientation and a second angular orientation.

7641355, Jan 5, 2010

Sep 4, 2007

11/897764

Kam Cham Lau - San Francisco CA, US

F21S 6/00

362123, 362231, 362252, 362806, 362800, 428 18, 428 19, 428 20

The decorative light device has a stylized shape of a Christmas tree, or a snow flake. It comprises a transparent or translucent solid plastic member having an elongated solid plastic main body and a plurality of side branches extending outward therefrom at an angle at a plurality of junctions. A light refraction opening is formed at the main body and located adjacent to each one of those junctions. An LED light source is located at a bottom end of the main body and is operative to provide a single or a series of flashing lights of various sequential colors for illuminating the main body and the side branches. A stylized snow flake can be made with a plurality of these solid plastic members mounted in an evenly spaced manner around the periphery of a center mounting member.

8041430, Oct 18, 2011

Apr 16, 2007

11/787240

Kam Cham Lau - San Francisco CA, US

A61N 1/18

607 46, 607 48, 607129

A TENS currents application device has a composite laminated construction consisting of an electrical current conductive layer made of a carbon material sandwiched between a flexible outer layer and a body contact layer. The outer layer may be made of plastic or metal and has a plurality of magnet elements imbedded therein. A heating means may be additionally provided in the device. The device may be in the form of a disc or round ball which can be held in the palm of a patient or in the form of a sole insert which can be placed in the sole of a foot ware. Protruding points are additionally formed on the outer surface of the round ball and on the outer surface of the sole insert. A vibrating device is located in the handheld device for providing additional massaging function to enhance the TENS treatment.