Invention Grant
- Patent Title: Light emitting device adapted for AC drive
- Patent Title (中): 适用于交流驱动的发光装置
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Application No.: US12995483Application Date: 2009-06-11
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Publication No.: US08530906B2Publication Date: 2013-09-10
- Inventor: Tim Dekker , Adrianus Sempel , Theodorus Johannes Petrus Van Den Biggelaar
- Applicant: Tim Dekker , Adrianus Sempel , Theodorus Johannes Petrus Van Den Biggelaar
- Applicant Address: NL Eindhoven
- Assignee: Koninklijke Philips N.V.
- Current Assignee: Koninklijke Philips N.V.
- Current Assignee Address: NL Eindhoven
- Agent John F. Salazar; Mark L. Beloborodov
- Priority: EP08158366 20080617
- International Application: PCT/IB2009/052494 WO 20090611
- International Announcement: WO2009/153715 WO 20091223
- Main IPC: H01L27/15
- IPC: H01L27/15

Abstract:
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.
Public/Granted literature
- US20110084624A1 LIGHT EMITTING DEVICE ADAPTED FOR AC DRIVE Public/Granted day:2011-04-14
Information query
IPC分类: