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US 11,109,464 B2Granted
LED driving circuit and LED apparatus
AssigneeXiamen Eco Lighting Co. Ltd.
InventorsQi Liu, Zongyan Liu, Qiyuan Wang, Yongjun Bao
Life of this patent
Estimating the term…
Abstract
A driving circuit includes: a first connecting port for receiving a first signal during a first operating mode; a second connecting port for receiving a second signal during the first operating mode or receiving a third signal during a second operating mode; a first driving unit coupled to the first connecting port and the second connecting port, for driving an LED element according to the first signal and the second signal during the first operating mode; and a second driving unit coupled to the second connecting port, for driving the LED element according to the third signal during the second operating mode; wherein the second operating mode is different from the first operating mode.
Claims14
A driving circuit, comprising:
- a first connecting port, arranged to receive a first signal during a first operating mode;
- a second connecting port, arranged to receive a second signal during the first operating mode or receiving a third signal during a second operating mode;
- a first driving unit, coupled to the first connecting port and the second connecting port, for driving an LED element according to the first signal and the second signal during the first operating mode;
- and
- a second driving unit, coupled to the second connecting port, for driving the LED element according to the third signal during the second operating mode;
- wherein the second operating mode is different from the first operating mode, wherein the first driving unit comprises:
- a switching control circuit, having an input terminal coupled to the first connecting port and an output terminal for generating a control signal;
- a switching module, having an input terminal coupled to the output terminal of the switching control circuit, and an output terminal for outputting an output signal according to the control signal;
- a rectifying and filtering circuit, coupled to the output terminal of the switching module, for driving the LED element according to the output signal during the first operating mode, wherein the first connecting port and the second connecting port are arranged to receive a fourth signal and a fifth signal during a third operating mode, the second driving unit is arranged to drive the LED element according to the fourth signal and the fifth signal during the third operating mode, and the third operating mode is different from the first operating mode and the second operating mode;
- and
- a first filament simulation circuit, having a first input terminal coupled to a first terminal of the first connecting port, a second input terminal coupled to a second terminal of the first connecting port, and an output terminal coupled to the first driving unit;
- and
- a second filament simulation circuit, having a first input terminal coupled to a first terminal of the second connecting port, a second input terminal coupled to a second terminal of the second connecting port, a first output terminal coupled to the first driving unit and the second driving unit, and a second output terminal coupled to the second driving unit.
10 more elements
A light emitting diode (LED) apparatus, comprising:
- a first connecting port, arranged to selectively couple to the electrical ballast or an inductance ballast;
- a second connecting port, arranged to selectively couple to the electrical ballast, an AC electric power supply, or the inductance ballast;
- a first driving unit, coupled to the first connecting port and the second connecting port, for driving an LED element when the first connecting port and the second connecting port are coupled to the electrical ballast;
- and
- a second driving unit, coupled to the second connecting port, for driving the LED element when the second connecting port is coupled to the AC electric power supply or when the first connecting port and the second connecting port are coupled to the inductance ballast and the AC electric power supply, wherein the first driving unit comprises:
- a switching control circuit, having an input terminal coupled to the first connecting port and an output terminal for generating a control signal;
- a switching module, having an input terminal coupled to input terminal of the switching control circuit, and an output terminal for outputting an output signal according to the control signal;
- a rectifying and filtering circuit, coupled to the output terminal of the switching module, for driving the LED element according to the output signal during the first operating mode, wherein the first driving unit is enabled and the second driving unit is disabled when the first connecting port and the second port are coupled to the electrical ballast, the first driving unit is disabled and the second driving unit is enabled when the second connecting port is coupled to the AC electric power supply, and the first driving unit is disabled and the second driving unit is enabled when the first connecting port and the second connecting port are coupled to the inductance ballast and the AC electric power supply;
- a first filament simulation circuit, having a first input terminal coupled to a first terminal of the first connecting port, a second input terminal coupled to a second terminal of the first connecting port, and an output terminal coupled to the first driving unit;
- and
- a second filament simulation circuit, having a first input terminal coupled to a first terminal of the second connecting port, a second input terminal coupled to a second terminal of the second connecting port, a first output terminal coupled to the first driving unit and the second driving unit, and a second output terminal coupled to the second driving unit.
8 more elements
Dependencies are inferred from the claim text.