Korry Electronics Co.

John R Green

Timothy R Robinson

Stephen H Humphrey

Leonard Y Nelson

Carol W Wong

Andrew B Leslie

A system for re-distributing light emitted from a light source using an optical element is described. The optical element is manufactured using a bulk matrix material, and diffusing particles and/or scattering particles are embedded within the bulk material. The optical element is coupled to the light source to capture emitted light and redistribute the light in a desired angular distribution pattern depending on the ratio of total weight of diffusing particles to total weight of scattering particles.

Apparatus for controlling the re-distribution of light emitted from a light-emitting diode

A fluorescent lamp (,) includes a tube (,) and a fluorescent gas mixture sealed in the tube. A phosphor layer (,) is deposited on the interior surface of the tube. A pair of internal electrodes (,), connected by a first circuit (,) to a first power supply (,), are located in the tube at opposite ends thereof. The first power supply (,) causes a high-intensity arc discharge between the pair of internal electrodes (,) and, in turn, produces fluorescent light. An opposing pair of conductive traces (,) connected by a second circuit (,) to a second power supply (,), are silk-screened onto the exterior surface of the lamp tube (,) along the length thereof. The second power supply (,) causes the opposing pair of conductive traces (,) to produce a transverse electric field that creates a low-intensity transverse discharge. The low-intensity transverse discharge is used to lower the luminance range of the fluorescent lamp. The conductive traces are formed of a conductive frit, such as a silver ceramic frit. After silk-screening, the lamp tube (,) is fired to melt the frit onto the tube. At least one of the conductive traces (,) is connected by a third circuit (,) to a third power supply (,). The resistivity of this conductive trace is such that the conductive trace functions as a heater when it receives power from the third power supply.

Fluorescent lamp with integral conductive traces for extending low-end luminance and heating the lamp tube

A switch mechanism (11) comprising a red LED light source (13), a filter assembly (15) and a photodetector assembly (17) is disclosed. The photodetector assembly (17) includes two filtered photodetectors (33 and 35) that are aligned with the light source (13) either directly or via a light canal (19). The filtered photodetectors (33 and 35) are designed to detect light in different narrow wavelength bands lying within the band of energy produced by the light source (13). The filter assembly (15) includes a two-position movable element (23) located between the light source (13) and the photodetector assembly (17). The movable element (23) includes two sections (25 and 27) having different light-passing abilities. In one of the movable element positions one section (25) is located between the light source and both filtered photodetectors and in the other movable element position the other section (27) is located therebetween. Preferably, one section (25) is a thin slab of transparent material and the other section (27) is a thin slab of filter material. The transmittance of the filter dye slab (27) is such that the ratio of the energy detected by the filtered photodetectors (33 and 35) when the filter dye slab (27) is located between the light source (13) and the filtered photodetectors (33 and 35) is different than the ratio of the energy detected when the transparent slab (25) is located between the light source (13) and the filtered photodetectors (33 and 35). Thus, the difference in ratios determines the position of the movable element (23).

Growing community of inventors

Seattle, WA, United States of America

John R Green