| 摘要 |
A high-efficiency LED lamp has an LED board (20) and a light guide (30) mounted inside a lamp holder (10). The lamp holder (10) has a cover (40) and a base (50) electrically connected to the LED board (20). The lamp holder (10) is made from ceramic or aluminum oxide ceramic through a high-temperature sintering process and is porous to provide enhanced heat-dissipating effects. The light guide (30) is a transparent glass cylinder made from borosilicate, with a bottom facing LEDs (22) mounted on the LED board (20), and a reflection layer (33) is coated on a top thereof. The reflection layer (33) has a conical reflection mirror facing the LEDs (22). Accordingly, the LEDs (22) irradiate light to the light guide (30) and the light is reflected by the reflection mirror to emit through entire cylindrical periphery of the light guide (30) and significantly enhance luminance efficiency. |
