Light-emitting diode driving module, method of operating thereof, and lighting apparatus including the same
First Claim
1. A light-emitting diode driving module comprising:
- an LED driving circuit to activate light-emitting diodes driven by a rectified voltage, and to adjust driving current conducted through driving nodes to the light-emitting diodes depending on a voltage of a driving current setting node; and
a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal, the driving current controller comprising;
a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal;
a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result; and
a power compensator to adjust the driving current control signal depending on the source voltage when the selection signal is enabled.
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Abstract
A light-emitting diode driving module includes an LED driving circuit to activate light-emitting diodes driven by a rectified voltage, and to adjust driving current conducted through driving nodes to the light-emitting diodes depending on a voltage of a driving current setting node; and a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal. The driving current controller includes a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal; a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result; and a power compensator to adjust the driving current control signal when the selection signal is enabled.
28 Citations
20 Claims
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1. A light-emitting diode driving module comprising:
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an LED driving circuit to activate light-emitting diodes driven by a rectified voltage, and to adjust driving current conducted through driving nodes to the light-emitting diodes depending on a voltage of a driving current setting node; and a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal, the driving current controller comprising; a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal; a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result; and a power compensator to adjust the driving current control signal depending on the source voltage when the selection signal is enabled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for driving light-emitting diodes activated by a rectified voltage and controlled through driving nodes, the method comprising the steps of:
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determining whether the rectified voltage is modulated, by receiving a source voltage based on the rectified voltage; when the rectified voltage is not modulated, adjusting current through the driving nodes based on the source voltage; and when the rectified voltage is modulated, adjusting currents conducted to the driving nodes in response to a dimming signal that indicates a degree of modulation of the rectified voltage, without adjusting current conducted to the driving nodes based on the source voltage. - View Dependent Claims (18)
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19. A lighting apparatus comprising:
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a light-emitting circuit to receive a rectified voltage, and including light-emitting diodes and a capacitor connected with the light-emitting diodes; and a light-emitting diode driving module connected with the light-emitting circuit through driving nodes, the light-emitting diode driving module comprising; an LED driver to adjust current conducted to the driving nodes depending on a voltage of a driving current setting node; and
a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal, the driving current controller comprising;a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal; a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result; and a power compensator to adjust the driving current control signal depending on the source voltage when the selection signal is enabled. - View Dependent Claims (20)
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Specification