Invention Grant
- Patent Title: LED lighting circuit fed by current source
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Application No.: US15314928Application Date: 2015-05-26
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Publication No.: US09913331B2Publication Date: 2018-03-06
- Inventor: Kumar Arulandu , Rifat Ata Mustafa Hikmet
- Applicant: PHILIPS LIGHTING HOLDING B.V.
- Applicant Address: NL Eindhoven
- Assignee: PHILIPS LIGHTING HOLDING B.V.
- Current Assignee: PHILIPS LIGHTING HOLDING B.V.
- Current Assignee Address: NL Eindhoven
- Agent Akarsh P. Belagodu
- Priority: EP14170538 20140530
- International Application: PCT/EP2015/061527 WO 20150526
- International Announcement: WO2015/181132 WO 20151203
- Main IPC: H05B33/08
- IPC: H05B33/08

Abstract:
A lighting circuit comprises a first circuit (1) with an element (31) with a diode function coupled serially to a parallel combination of a capacitor (41) and a serial combination of a first LED (21) and a first switch (11) and comprises a second circuit (2) with a second switch (12). The circuits (1, 2) are parallel circuits. The lighting circuit produces light in response to a supply current from a current source (6). The second switch (12), when conducting, lets the supply current pass and prevents it from flowing through the element (31), and, when non-conducting, blocks the supply current and it flows through the element (31). The first switch (11), when non-conducting, prevents the first LED (21) from producing some of the light, and, when conducting, allows the first LED (21) to produce some of the light. Power for the first LED (21) is delivered via the supply current when flowing through the element (31) or via a capacitor current supplied by the capacitor (41).
Public/Granted literature
- US20170245332A1 LED LIGHTING CIRCUIT FED BY CURRENT SOURCE Public/Granted day:2017-08-24
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