Patent application number | Description | Published |
20120134148 | LED LIGHTING WITH INCANDESCENT LAMP COLOR TEMPERATURE BEHAVIOR - In a lighting device, sets of LEDs are employed using the natural characteristics of the LEDs to resemble incandescent lamp behavior when dimmed, thereby obviating the need for sophisticated controls. A first set of at least one LED produces light with a first color temperature, and a second set of at least one LED produces light with a second color temperature. The first set and the second set are connected in series, or the first set and the second set are connected in parallel, possibly with a resistive element in series with the first or the second set. The first set and the second set differ in temperature behavior, or have different dynamic electrical resistance. The light device produces light with a color point parallel and close to a blackbody curve. | 05-31-2012 |
20120319554 | ELECTRIC LAMP HAVING REFLECTOR FOR TRANSFERRING HEAT FROM LIGHT SOURCE - The invention relates to an electric lamp ( | 12-20-2012 |
20130201677 | MAINTAINING COLOR CONSISTENCY IN LED LIGHTING DEVICE HAVING DIFFERENT LED TYPES - A lighting device has a plurality of LEDs connected in series. In the lighting device, a first LED assembly has LEDs of a first type having a first luminous flux output decreasing as a first function of its junction temperature. A second LED assembly has LEDs of a second type having a second luminous flux output decreasing as a second function of its junction temperature different from the first function. At least one of the LEDs of the first type and LEDs of the second type is connected in parallel to a resistor assembly having a temperature-dependent resistance. The temperature dependence of the resistance stabilizes a ratio of the first luminous flux output to the second luminous flux output at different junction temperatures of the first LED assembly and the second LED assembly. | 08-08-2013 |
20140001956 | Lighting Device | 01-02-2014 |
20140043788 | Illumination device with an envelope enclosing a light source - The invention provides an illumination device comprising an envelope enclosing a light source, preferably a LED, and a luminescent material. The envelope comprises a transmissive part, and a reflective part, wherein the reflective part comprises a reflective ceramic material. The ceramic material can be used for heat dissipation. | 02-13-2014 |
20140049189 | LED LIGHTING DEVICE WITH INCANDESCENT LAMP COLOR TEMPERATURE BEHAVIOR - In a lighting device, sets of LEDs are employed using the natural characteristics of the LEDs to resemble incandescent lamp behavior when dimmed, thereby Obviating the need for sophisticated controls. A first set of at least one LED produces light with a first color temperature, and a second set of at least one LED produces light with a second color temperature. The first set and the second set are connected in series, or the first set and the second set are connected in parallel, possibly with a resistive element in series with the first or the second set. The first set and the second set differ in temperature behavior, or have different dynamic electrical resistance. In various embodiments, the sum of the currents provided to the first and second sets may be substantially equal to a magnitude of an input current. | 02-20-2014 |
20140191647 | Electric lamp having reflector for transferring heat from light source - The invention relates to an electric lamp ( | 07-10-2014 |
Patent application number | Description | Published |
20110241552 | METHOD FOR MAXIMIZING THE PERFORMANCE OF A LUMINAIRE - A method for maximizing the performance of a luminaire ( | 10-06-2011 |
20110248618 | ELECTRIC LAMP - A bulb-type LED lamp ( | 10-13-2011 |
20120069547 | ILLUMINATION DEVICE WITH AN ENVELOPE ENCLOSING A LIGHT SOURCE - The invention provides an illumination device comprising an envelope enclosing a light source, preferably a LED, and a luminescent material. The envelope comprises a transmissive part, and a reflective part, wherein the reflective part comprises a reflective ceramic material. The ceramic material can be used for heat dissipation. | 03-22-2012 |
20130235586 | LED-BASED ELECTRIC LAMP - Disclosed is an LED-based bulb-type lamp, including a cooling structure and a plurality of LEDs thermally connected to the cooling structure. The lamp includes at least three separate LED arrays oriented substantially parallel to its central longitudinal axis, such that the LEDs are interspersed among a plurality of light-transmission sub-areas of the LED-based lamp. One or more portions of the cooling structure of the lamp extend to its outer surface, as assembled, such that light-transmissive and heat-dissipating areas are spread over the outer surface, for example, in an alternating manner. | 09-12-2013 |