Huiling Zhu, Age 63101 Kendall Rd, Lexington, MA 02421

6369518, Apr 9, 2002

Jan 28, 1999

09/239712

Timothy L. Kelly - Boston MA
Huiling Zhu - Lexington MA
Jakob Maya - Brookline MA

Matsoshita Electric Works R D Laboratories Inc

H05B 3702

315209R, 362263

A method and system of modifying one feature of a high-pressure lamp without significantly affecting the other features, the features including the luminosity, the color rendering index, the color temperature, or the deviation from the black body locus (D ). An arc discharge is initiated within the arc tube with a ballast imposing an alternating current waveform on the electrodes. In this way, the electrodes change from positive to negative in each cycle of operation. The waveform of each cycle is modified through the ballast to energize one electrode as positive or negative for a longer time than the other electrode, thereby altering the temperature distribution within the arc tube by changing the cold spot and hot spot temperatures in a lamp which has modifiable emission features.

7262553, Aug 28, 2007

Jun 26, 2003

10/607162

Nanu Brates - Winchester MA,
Shinichi Anami - Wellesley MA,
Huiling Zhu - Lexington MA,
Stefaan M. Lambrechts - Beverly MA,
Jakob Maya - Brookline MA,

Matsushita Electric Industrial Co., Ltd. - Osaka
Matsushita Electric Works, Ltd. - Osaka

H01J 61/33
H01J 61/18

313634, 313638, 313573

An arc discharge metal halide lamp for use in selected lighting fixtures comprising a discharge chamber having light permeable walls of a selected shape including therein a pair of end region wall portions through each of which a corresponding one of a pair of electrodes are supported separated from one another by a separation length. The ratio of the separation length to the effective operation inner diameter of the chamber is greater than two. The lengths of the wall sides between the end wall portions is greater than the effective operation inner diameter. The end wall portions have inner surfaces of constant or smaller varying radii of curvature and they are separated from the interior ends of the electrodes by more than one millimeter. The discharge chamber can be constructed of polycrystalline alumina and contain metal halides.

5355053, Oct 11, 1994

Nov 24, 1992

7/980897

Huiling Zhu - Manchester NH

OSRAM Sylvania Inc. - Danvers MA

H01J 744
H01J 1346

315 73

A starting aid for high pressure sodium vapor lamps eliminates the need to mechanically connect an ignition wire to the lamp frame. The starting aid employs an ignition wire which is slidably clipped directly to the arc tube at one end and which is connected to a bi-metallic switch at the other end. The bi-metallic switch is mechanically and electrically connected to one power lead of the arc tube.

6242851, Jun 5, 2001

May 7, 1998

9/074623

Huiling Zhu - Lexington MA
Jakob Maya - Brookline MA

Matsushita Electric Works Research and Development Laboratory Inc - Woburn MA

H01J 102
H01J 724
H01J 6152
H01J 1716
H01K 158

313 25

This invention relates to dimmable metal halide lamps using ceramic arc tubes for the application of energy saving, mood control, and constant light output over the life of the lamp. Under dimmed conditions, as low as 50% of rated wattage, the color temperature (CCT) can remain substantially the same and be perceived by the viewer as a constant color light source. Furthermore, the invention improves the color rendering index (CRI) and the efficacy of the lamp under dimmed operation. Such improvements are provided by placing a metal shield on an end of the arc tube, whereby the emissivity of the shield is lower than the emissivity of the ceramic in the arc tube, whereby cold spot temperature in the lamp is increased, even under dimmed conditions.

5757137, May 26, 1998

May 2, 1997

8/850365

Huiling Zhu - Manchester NH

Osram Sylvania Inc. - Danvers MA

H05B 3702

315 73

A starting aid for high pressure sodium vapor lamps eliminates the need to mechanically connect an ignition wire to the lamp frame. The starting aid employs an ignition wire which is slidably clipped directly to the arc tube at one end and which is connected to a bi-metallic switch at the other end. The bi-metallic switch is mechanically and electrically connected to one power lead of the arc tube.

5381070, Jan 10, 1995

Oct 19, 1993

8/139474

Billy W. Tuttle - Londonderry NH
Huiling Zhu - Manchester NH
Robert B. Dolan - Manchester NH

Osram Sylvania Inc. - Danvers MA

H01J 548
H01J 550

313318

A lamp base locking clip including a plate having a lip extending outwardly on one end, and a flat portion on the opposite end, is captured in a keyway formed in the glass neck of a lamp body. One of the lamp lead-in wires is welded to the flat portion of the clip and a rim on a lamp base shell is welded to the outwardly extending lip, thus forming a lamp-base assembly with good torque resistance and no lead-based solder.

5562515, Oct 8, 1996

Jun 6, 1995

8/465805

Huiling Zhu - Londonderry NH

Osram Sylvania Inc. - Danvers MA

H01K 140

445 1

A lamp base locking clip comprises a first end having a given thickness; an intermediate portion having a thickness at least approximately 3 times said given thickness and a second end having said given thickness. The intermediate portion is defined by opposed, space apart, first and second surfaces, said first end being contiguous with said first surface and said second end being contiguous with said second surface. In a preferred embodiment the clip is formed from a single piece of ribbon material and said intermediate portion is formed by folding said ribbon to have two reentrant portions. The preferred embodiment is especially suited for automation.

6007398, Dec 28, 1999

Jul 3, 1997

8/887857

Huiling Zhu - Londonderry NH
Paul H. Ingalls - Penacook NH
Robert B. Dolan - Manchester NH

Osram Sylvania Inc. - Danvers MA

H01J 900

445 26

Variable backspace in electrode assemblies for high pressure sodium lamps is achieved by employing a hollow electrode base which has one end formed to frictionally engage an electrode, which electrode includes a solid core having a coil about one end thereof. The solid core is inserted into the electrode base a given distance and is maintained in this position by friction until welding is accomplished. The electrode base is provided with a positioning ring which is formed at the time the base is first formed. The electrode assemblies can be utilized with lamps having different arc lengths while using arc tubes having the same size.