发明授权
US08530906B2 Light emitting device adapted for AC drive 有权
适用于交流驱动的发光装置

Light emitting device adapted for AC drive
摘要:
A light emitting device comprising a first common electrode (11; 21), a structured conducting layer (12; 22), forming a set of electrode pads (14; 24a, 24b) electrically isolated from each other, a dielectric layer (13; 23), interposed between the first common electrode layer (11; 21) and the structured conducting layer (12; 22), a second common electrode (15; 30), and a plurality of light emitting elements (16; 20a, 20b), each light emitting element being electrically connected between one of the electrode pads (14; 24a, 24b) and the second common electrode (15; 30), so as to be connected in series with a capacitor (18; 31) comprising one of the electrode pads (14; 24a, 24b), the dielectric layer (13; 23), and the first common electrode (11; 21). When an alternating voltage is applied between the first and second common electrodes, the light emitting elements will be powered through a capacitive coupling, also providing current limitation. During operation of the light emitting device, a shorts circuit failure in one light emitting element will affect only light emitting elements connected to the same capacitor. Further, the short circuit current will be limited by this capacitor.
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