Energy-saving dimming apparatus
First Claim
1. An energy-saving dimming apparatus connected to a power source and a load, and adapted to control a luminance of the load, comprising:
- a first switching unit connected to a power supply line;
a second switching unit connected between the first switching unit and a ground line;
a microprocessor for generating a square-wave pulse having a duty cycle according to a luminance control command;
a switch driver for generating switching control signals respectively adapted to perform alternate ON/OFF controls for the switching units in accordance with the square-wave pulse inputted thereto;
a low-pass filter for removing ripple components contained in a voltage applied to the load via the first switching unit; and
a level amplifier for amplifying a level of the square-wave pulse.
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Accused Products
Abstract
Disclosed is an energy-saving dimming apparatus connected to a power source and a load, and adapted to control a luminance of the load. The dimming apparatus includes a first switching unit connected to a power supply line, a second switching unit connected between the first switching unit and a ground line, a microprocessor for generating a square-wave pulse having a duty cycle according to a luminance control command, a switch driver for generating switching control signals respectively adapted to perform alternate ON/OFF controls for the switching units in accordance with the square-wave pulse inputted thereto, and a low-pass filter for removing ripple components contained in a voltage applied to the load via the first switching unit.
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Citations
14 Claims
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1. An energy-saving dimming apparatus connected to a power source and a load, and adapted to control a luminance of the load, comprising:
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a first switching unit connected to a power supply line;
a second switching unit connected between the first switching unit and a ground line;
a microprocessor for generating a square-wave pulse having a duty cycle according to a luminance control command;
a switch driver for generating switching control signals respectively adapted to perform alternate ON/OFF controls for the switching units in accordance with the square-wave pulse inputted thereto;
a low-pass filter for removing ripple components contained in a voltage applied to the load via the first switching unit; and
a level amplifier for amplifying a level of the square-wave pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dimming apparatus comprising:
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an electromagnetic interference filter for removing harmonic components of a current inputted via a power supply line, and removing electromagnetic interference;
a first switching unit connected to an output terminal of the electromagnetic interference filter;
a second switching unit connected between an output terminal of the first switching unit and a ground line;
a user interface for inputting a luminance control command;
a microprocessor for generating a square-wave pulse having a duty cycle according to the luminance control command;
a level amplifier for amplifying a level of the square-wave pulse;
a switch driver for generating switching control signals respectively adapted to perform alternate ON/OFF controls for the switching units in accordance with the square-wave pulse inputted thereto; and
a low-pass filter for removing ripple components contained in a voltage applied to the load via the first switching unit. - View Dependent Claims (14)
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Specification