Stefaan M Lambrechts

6605888, Aug 12, 2003

Oct 26, 1999

09/427305

John F. Waymouth - Marblehead MA
Timothy Lee Kelly - Boston MA
Stefaan Maria Lambrechts - Beverly Farms MA
Jakob Maya - Brookline MA

Matsushita Electric Works, Ltd. - Osaka

H01J 516

313112, 313110, 359359

A metal halide lamp having excess amount of red radiation, well beyond a tungsten halogen lamp of the same color temperature. The deep saturated red being accomplished with reasonable efficacy utilizing a mixture of sodium and rare earth halides, additional broadening of the Na âDâ lines and filtering out the yellow radiation at about 590 nm. The red radiation is comparable to the commercially available white high pressure sodium lamp red radiation.

6819050, Nov 16, 2004

May 2, 2003

10/428303

Huiling Zhu - Lexington MA
Stefaan Maria Lambrechts - Beverly MA
Jakob Maya - Brookline MA

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

H01J 1720

313639, 313637, 313640

An arc discharge metal halide lamp for use in selected lighting fixtures having a discharge chamber with light permeable ceramic walls about a discharge region. A pair of electrodes are supported in the discharge region spaced apart from one another. Ionizable materials are provided in the discharge region comprising mercury, a noble gas, and at least two metal halides including a magnesium halide and a sodium halide, a rare earth clement, and thallium iodide in a molar quantity which is between 0. 7 and 5% of that total molar quantity of all halides present in the discharge chamber.

7057350, Jun 6, 2006

May 5, 2004

10/839804

Stefaan M. Lambrechts - Beverly MA, US
Nobuyoshi Takeuchi - Osaka, JP
Jakob Maya - Brookline MA, US

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

H01J 17/20

313640, 313637

An arc discharge metal halide lamp having a discharge chamber having visible light permeable walls bounding a discharge region supported electrodes in a discharge region spaced apart by a distance Lwith an average interior diameter equal to D so they have a selected ratio with D exceeding a minimum value. Ionizable materials are provided in this chamber involving a noble gas, one or more halides, and mercury in an amount sufficiently small so as to result in a relatively low maximum voltage drop between the electrodes during lamp operation for a lamp dissipation sufficient to have the chamber wall loading exceed a minimum value or so as to maintain chamber luminosity above a minimum value for a selected operational duration.

7138765, Nov 21, 2006

Sep 8, 2003

10/657380

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

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

H05B 31/38
H05B 31/00

313620, 313637, 313639, 313634

An arc discharge metal halide lamp having a discharge chamber having visible light permeable walls bounding a discharge region supported electrodes in a discharge region spaced apart by a distance Lwith an average interior diameter equal to D so they have a selected ratio. Ionizable materials are provided in this chamber involving a noble gas, one or more halides, and mercury in an amount sufficiently small so as to result in a relatively low maximum voltage drop between the electrodes during lamp operation.

7714512, May 11, 2010

Oct 19, 2005

11/253979

Stefaan M. Lambrechts - Beverly MA, US
Huiling Zhu - Lexington MA, US
Jakob Maya - Brookline MA, US
Timothy Lee Kelly - Boston MA, US

Matsushita Electric Industrial Co., Ltd. - Osaka

H01J 61/12

313638, 313637, 313640

An arc discharge metal halide lamp for use in selected lighting fixtures having a discharge chamber with light permeable walls of a selected shape bounding a discharge region of a selected volume through which walls a pair of electrodes are supported with ionizable materials being provided in the discharge region of the discharge chamber comprising at least one member selected from a group consisting of halides of cerium, dysprosium, holmium, lithium, sodium, praseodymium, thallium and thulium, and further comprising a halide of calcium in a selected fraction of that weight total of all halides present in the discharge chamber with this selection depending also on the addition or not of a halide of aluminum. Others of the foregoing halides that are present are provided in amounts with certain limits.

7262553, Aug 28, 2007

Jun 26, 2003

10/607162

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

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.

6501220, Dec 31, 2002

Oct 18, 2000

09/691509

Stefaan Lambrechts - Beverly Farms MA
Jakob Maya - Brookline MA

Matushita Research and Development Laboraties Inc - Woburn MA

H01J 1720

313571, 313637

A thallium-free high pressure ceramic metal halide lamp having superior dimming characteristics with a fill composition comprising MgI and CeI. In addition, the fill chemistry comprises NaI and the halides of rare earth metals such as Dy, Ho and Tm.