| abstract |
To provide a liquid-cooled LED bulb having a liquid volume compensation mechanism for compensating for a volume of liquid increased by thermal expansion. An LED bulb (100) includes a bulb base (110), a shell (101), a plurality of LEDs (103), a heat conducting liquid (111), and a diaphragm member (120). The heat transfer liquid is contained in the shell. The plurality of LEDs are disposed in the shell and immersed in the heat transfer liquid. The diaphragm member is disposed in the LED bulb. The diaphragm member is configured to compensate for expansion of the heat transfer liquid. The diaphragm member moves from the first position to the second position. In the first position, the heat transfer liquid is provided with a first volume, and in the second position, the heat transfer liquid is provided with a second volume greater than the first volume. [Selection] Figure 1 |