Osram Sylvania Inc.

Gte Products Corporation

Edward P Otto

Jason Lessard

Charles M Coushaine

Thomas Tessnow

Michael D Tucker

Richard Holland

Daniel D Devir

Joseph C Swadel

Robert B Dolan

Paul A Young

Thomas Teenow

A white-light emitter is disclosed, in which a silicone sheet is laminated between a pair of optically clear plastic sheets. The silicone sheet lacks the ability to retain its shape, while the three sheets, when sealed together, can retain a shape. The silicone sheet includes at least one phosphor, with a phosphor concentration between two percent and ten percent. The silicone sheet may be produced by molding. Compared to comparable silicone parts made by extrusion, the molded parts may show less part-to-part variation in color temperature, may be run in significantly smaller batches or as one-offs, and may allow the silicone and phosphor material to be mixed by hand or with a relatively simple mixing machine. In some cases, the sheets are sealed together at their perimeters and include a margin around the phosphor sheet. In some cases, the phosphor sheet includes a mixture of different phosphors.

White-light emitter having a molded phosphor sheet and method of making same

A white-light emitter is disclosed, in which light from blue light-emitting diodes strikes an active area of a phosphor sheet. The active area absorbs a portion of the blue light and emits phosphor light in response to the absorbed blue light. The emitter includes a stretcher that controllably stretches the active area of the phosphor sheet. The white light output spectrum of the active area has a characteristic color temperature that increases as the phosphor sheet is stretched, and decreases as the phosphor sheet contracts. As the phosphor sheet is stretched, the thickness of the active area decreases, the received blue light encounters fewer phosphor particles within the active area, the absorbed portion of the blue light decreases, the emitted phosphor light decreases, and the active area has a white light output spectrum that becomes weighted more heavily toward the blue light and less heavily toward the phosphor light.

Phosphor sheet having tunable color temperature

An advanced forward lighting system may be made with a lamp having a first filament and a second filament extending perpendicular to the first filament. The second filament is partially hidden rearward and above the first filament. A reflector forms a main beam from the first filament light and a right or left cast supplemental beam from the second filament light. The second filament's position minimizes glare, and enables a simple advanced forward lighting system from a single standard lamp fitting both right and left side reflectors.

Automotive lamp and reflector for low beam and advanced forward lighting system

A lamp assembly is provided which includes a lamp such as an arc tube sealed within a sleeve which is attached to a pair of retainer members which are coupled to a base component. The sleeve includes a circumferential groove and the retainer members include curved detents. The retainer members are attached to the sleeve by causing the detents to engage the surface of the groove and mate therewith, the two retainer members being welded together. Respective segments of the retainer members are tensioned relative to a mounting portion of the base component and attached thereto.

Lamp and method of producing same

A high-pressure sodium arc discharge lamp having a novel arc tube support member which provides a secure mechanical and electrical connection and does not require welding between the support member and the arc tube lead wire or feedthrough. The support member may be adapted for mounting a single arc tube or two arc tubes within the outer envelope. The feedthrough of each arc tube is inserted into an aperture in the support member such that a secure interference fit is achieved. The interference fit is similar to the fastening of a threadless nut. In a preferred embodiment, the support member has a first planar surface having one or more apertures therein and two second planar surfaces substantially perpendicular to the first planar surface; each second planar surface has a protruding leg by which the support member may be mounted on the internal lamp frame. Several alternative designs are disclosed wherein, for example, the aperture may be circular or rectangular, the aperture may or may not have opposing tabs, and the cross section of the arc tube lead wire or feedthrough disposed within the aperture may be circular or rectangular.

Growing community of inventors

Henniker, NH, United States of America

Edward P Otto