| 摘要 |
<p>The invention describes an AC-LED lighting circuit (1) comprising an AC-LED arrangement (10) with at least a first set (11) of LEDs connected according to a first polarity and a second set (12) of LEDs connected according to the opposite polarity, which AC-LED lighting circuit (1) is characterized by (i) a source (61) of a polarity-selectable DC input signal (51) to be applied to the AC-LED arrangement (10), or a connecting means (40) for connecting the AC-LED lighting circuit (1) to a fixed-polarity DC input signal (50) and a conversion means (T1, T2, T3, T4) for converting the fixed-polarity DC input signal (50) to a polarity-selectable DC signal (50') to be applied to the AC-LED arrangement (10); and (ii) a polarity controller (70, 71) realized to control the polarity of the polarity-selectable DC signal (50', 51) applied to the AC-LED arrangement (10) such that the first set (11) of LEDs of the AC-LED arrangement (10) is driven when the polarity-selectable DC signal (50', 51) has the first polarity, and the second set (12) of LEDs of the AC-LED arrangement (10) is driven when the polarity-selectable DC signal (50', 51) has the opposite polarity. The invention further describes an AC-LED lighting device (9) comprising such an AC-LED lighting circuit (1) and having an outer chamber (90) enclosing the AC-LED arrangement (10) of the AC-LED lighting circuit (1) and a lamp base (91) at least partially incorporating the connector (3) of the AC-LED lighting circuit (1). The invention also describes a method of driving an AC-LED lighting circuit comprising an AC- LED arrangement (10).</p> |
