Electrodeless lighting system and control method thereof
AssigneeLG Electronics Inc.
InventorsSeok Heo, Kyusuk Hwang, Sungkyeom Kim, Jeongwon Kim
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Abstract
An electrodeless lighting system and its control method are disclosed. When the electrodeless lighting system starts, a larger amount of filament current of a magnetron is applied to stably drive the magnetron, and when the electrodeless lighting system operates normally, a smaller amount of filament current is applied, thus avoiding interference with a wireless LAN, lengthening a life span of the magnetron, reducing noise, and improving an operational efficiency of the electrodeless lighting system.
Claims7
An electrodeless lighting system comprising:
- a magnetron having a filament therein and generating microwave;
- a resonator having an electrodeless light bulb therein and resonating microwave generated from the magnetron;
- a wave guide guiding the microwave generated from the magnetron to the resonator;
- and
- a control unit configured to:
- apply a filament current which is the same as or greater than a pre-set first current to the filament during an initial starting stage,
- compare a number of pulses of light in the electrodeless light bulb with a pre-set reference number of pulses,
- determine that the electrodeless light bulb is in a pre-set normal state when the number of pulses of the light in the electrodeless light bulb is greater than the reference number of pulses, and
- based on the determination that the electrodeless light bulb is in a pre-set normal state, change and apply the filament current which is the same as or smaller than a second current to the filament, wherein the second current is smaller than the first current.
A method for controlling an electrodeless lighting system, the system comprising a magnetron having a filament therein and generating microwave, a resonator having an electrodeless light bulb therein and resonating microwave generated from the magnetron, and a wave guide guiding the microwave generated from the magnetron to the resonator, the method comprising:
- applying a filament current that is the same as or larger than a pre-set first current to the magnetron;
- determining that the electrodeless lighting system is in a pre-set normal state when the number of pulses of the light in the electrodeless light bulb is greater than the reference number of pulses;
- and
- based on determining that the electrodeless lighting system is in a pre-set normal state, changing the filament current such that it is a second current, which is smaller than the first current,
- wherein determining that the electrodeless lighting system is in a pre-set normal state includes:
- detecting light of the electrodeless light bulb according to microwave outputted from the magnetron to the wave guide, and
- comparing the number of pulses of the detected light and a pre-set reference number of pulses.
Dependencies are inferred from the claim text.