| 摘要 |
The invention discloses LED tubes (300) that are very efficient and can operate with direct AC input or with existing inductor ballast. The LED tubes (300) make use of reactive components, such as capacitors (354, 355), to oppose input voltage as well as to limit the current. The LED tubes (300) have two circuit paths that can light up the LED tubes. The first circuit path is for the case where the LED tube has a direct AC input. The second circuit path is for the case where the LED tube is used in combination with inductor ballast and LED starter. As there are four input pins (321, 322, 331, 332) for LED tube (300), two input pins (321, 322) are used for the first circuit while the four input pins are used for the second circuit. |
