LED light-concentrating bulb

• Main Author: YOU, ZHI-MING
• Format: Patent
• Language: Chinese; English
• Published: 01.07.2011
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHTING; MECHANICAL ENGINEERING; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

A LED light-concentrating bulb includes a lamphead including a first and a second electrodes, a circuit board electrically connected to the first electrode, an a.c. LED with a power exceeding 0.5 watt installed on the circuit board, a resistor with a resistance of 50 to 50000 ohms electrically connected between the circuit board and the second electrode and serially connected with the a.c. LED between the first and second electrodes for forming a loop, a heat-conductive insulation material with a thermal conductivity coefficient of 0.25 - 30 W/mK and used to fill up the interior of first electrode and mechanically contact the circuit board and the first electrode for providing a thermal channel and assisting the a.c. LED in dissipating heat to the first electrode, and a light-concentrating cover fastened on the circuit board, in which the bottom of light-concentrating cover is formed with an aperture for exposing the a.c. LED, in which the internal surface of light-concentrating cover has a reflective face fo