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US 9,320,098 B2Granted
Lighting device and light-emitting device
AssigneeLumens Co., Ltd.
InventorSoo Geun Yoo
Life of this patent
Estimating the term…
Abstract
Disclosed is a light-emitting device configured in such a manner that all light-emitting elements always emit light irrespective of the magnitude of an input voltage when the magnitude of the voltage is higher than the minimum light-emitting voltage, and that the light-emitting elements are connected to each other in parallel when the magnitude of the voltage is small, and connected to each other in series when the magnitude of the voltage is large.
Claims18
A lighting device comprising:
- a light-emitting unit comprising a current input node, a current output node, a current bypass output node, and a first light-emitting group for emitting light due to a current input to the current input node;
- a second light-emitting group connected to receive a current output from the current output node;
- and
- a flicker controller provided between the current input node and the current bypass output node to turn off the first and second light-emitting groups when a voltage input to the current input node is equal to or lower than a predetermined voltage,
- wherein the current output node is configured to selectively output a whole or a part of a current input through the current input node, and
- wherein the current bypass output node is configured to output a remaining part of the current input through the current input node, when the current output node outputs the part of the current.
3 more elements
A light-emitting device comprising:
- a plurality of light-emitting groups electrically connected to each other to be numbered in a direction from an upper stream to a lower stream, and receiving power from a power supply for supplying power having a variable potential;
- a first bypass unit;
- a second bypass unit;
- and
- a flicker controller for turning off the light-emitting groups when a voltage input from the power supply is equal to or lower than a predetermined voltage,
- wherein each of the light-emitting groups comprises one or more light-emitting elements,
- wherein the first bypass unit is configured to electrically connect an upper stream node of a first light-emitting group which is arbitrary-numbered, to an upper stream node of a second light-emitting group which is arbitrary-numbered and provided at a lower stream of the first light-emitting group, in an interruptive manner, and
- wherein the second bypass unit is configured to electrically connect a lower stream node of the first light-emitting group to a lower stream node of the second light-emitting group or a lower stream node of a third light-emitting group which is arbitrary-numbered and provided at a lower stream of the second light-emitting group, in an interruptive manner.
5 more elements
An alternating current (AC) power light-emitting diode (LED) lighting device comprising:
- a plurality of light-emitting groups linearly and electrically connected to each other to be numbered from an uppermost stream to a lower stream;
- a first circuit unit for connecting connection nodes between the light-emitting groups to a ground;
- a second circuit unit for bypass-connecting the connection nodes to each other;
- and
- a flicker controller for turning off the light-emitting groups when a voltage input to a light-emitting group of the uppermost stream is equal to or lower than a predetermined voltage,
- wherein the light-emitting groups are configured to be switched from a parallel connection state to a serial connection state sequentially from the light-emitting group of the uppermost stream to a light-emitting group of the lowermost stream while a potential of supplied AC power is increased, and
- wherein each of the light-emitting groups comprises one or more LED elements.
4 more elements
A lighting device comprising:
- a light-emitting unit comprising a first light-emitting group, a first bypass unit, a second bypass unit, and a current input node commonly connected to an input node of the first light-emitting group and an input node of the first bypass unit to supply a current to the first light-emitting group and the first bypass unit;
- a second light-emitting group connected to the light-emitting unit to receive a current output from an output node of the first light-emitting group in a first circuit state and to receive a current output from an output node of the first bypass unit in a second circuit state;
- and
- a flicker controller connected to the current input node to turn off the first and second light-emitting groups when a voltage input to the current input node is equal to or lower than a predetermined voltage,
- wherein the first bypass unit is configured to be interrupted not to flow a current therethrough, and the second bypass unit is configured to be interrupted not to flow therethrough the current output from the first light-emitting group, in the first circuit state, and
- wherein the first bypass unit is configured to flow a current therethrough, and the second bypass unit is configured to flow therethrough at least a part of the current output from the first light-emitting group, in the second circuit state.
3 more elements
A lighting device comprising:
- two light-emitting units connected to each other in parallel at a first voltage higher than a turn-on voltage;
- and
- a flicker controller for turning off the two light-emitting units when a voltage input to an upper stream node of the two light-emitting units is equal to or lower than a predetermined voltage,
- wherein the two light-emitting units are switched to a serial connection state at a second voltage higher than the first voltage, and
- wherein the two light-emitting units are always turned on at a voltage higher than the turn-on voltage.
2 more elements
Dependencies are inferred from the claim text.