Abrégé

A lighting device (100) including one or more solid state light sources (192) providing air cooling of the electronic driver (190) is disclosed. The driver (190) receives power and provides it to the light source(s). The device also includes a first (102) and a second (106) housing. The first housing (102) contains, at least in part, the driver (190), and includes a support (104) having an exterior (118) and an interior (119), that provides mechanical support to the second housing (106) connected thereto. The interior (119) includes a first opening (108). The second housing (106) is a heat sink for the device. The second housing (106) has an interior portion (142), with a second opening (109) corresponding to the first opening (108), and an exterior portion (140), having a plurality of external openings (110, 120). Air entering an external opening (110, 120) is able to mix with air in the first housing (102) by flowing through the first opening (108) and the corresponding second opening (109), which cools the electronic driver (190).

Classes IPC  ?

• F21V 29/83 - Dispositions de refroidissement caractérisées par des éléments passifs de dissipation de chaleur, p.ex. puits thermiques les éléments comportant des ouvertures, des conduits ou des canaux, p.ex. des trous de rayonnement thermique
• F21V 29/70 - Dispositions de refroidissement caractérisées par des éléments passifs de dissipation de chaleur, p.ex. puits thermiques
• F21K 9/23 - Sources lumineuses rétrocompatibles pour dispositifs d’éclairage avec un seul culot pour chaque source lumineuse, p.ex. pour le remplacement de lampes à incandescence avec un culot à baïonnette ou à vis
• F21K 9/238 - Agencement ou montage d’éléments de circuit intégrés dans la source lumineuse

Abrégé

A circuit detects the type of a power supply driving an LED by analyzing a signal received from the power supply. The circuit controls a behavior of the LED, such as its reaction to a dimmer or to thermal conditions, based on the determined type. Another embodiment dims the LED based on a duty cycle detected in an incoming power signal. A thermal- management circuit detects a temperature of the LED, obtains a thermal operating range of the LED, and generates a control signal in response.

Classes IPC  ?

• H05B 45/3575 - Circuits de commande spécialement adaptés aux sources lumineuses LED rétro-compatibles Émulation des caractéristiques électriques ou fonctionnelles des lampes incandescentes utilisant des charges factices ou des circuits de purge, p.ex. des variateurs de lumière
• H05B 45/10 - Commande de l'intensité de la lumière
• H05B 45/30 - Circuits de commande

Abrégé

A power converter and power conversion method converts an input AC signal to a voltage usable by a load while reducing power consumption, thereby making the converter and method suitable for a wider range of applications. A rectifier receives the AC input signal and outputs a rectified voltage Vs, a controller has a power input connected to Vs and outputs two out-of-phase signals, two transistors are connected in series between Vs and a ground and each of the two transistors has a gate connected to a respective one of the two out-of-phase signals, and a transformer that has a primary coil connected to a node between the two transistors and a secondary coil connected to a load feeds back current from the secondary coil to the power input of the controller to reduce power consumption.

Classes IPC  ?

• H02M 5/458 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p.ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques utilisant des tubes à décharge ou des dispositifs à semi-conducteurs pour transformer le courant continu intermédiaire en courant alternatif utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H05B 41/36 - Commande