Encoding device for light-emitting-diode lamp, lamp, and controlled lighting system
First Claim
1. An encoding device for a light-emitting-diode (LED) lamp, said encoding device being adapted to receive an alternating current (AC) voltage input and display data related to a light-emitting operation, said encoding device comprising:
- a rectifier for rectifying the AC voltage input to result in a rectified signal; and
an encoder for generating an encoded signal from the rectified signal and the display data, the encoded signal having an amplitude corresponding to a magnitude of the rectified signal, and a waveform corresponding to the display data, the encoded signal having a plurality of consecutive signal regions of equal time durations, each of the signal regions having one of first and second states, the waveform of the signal region having the first state being a positive half-cycle of an AC sinusoidal wave, the waveform of the signal region having the second state being a low potential waveform;
the display data including a plurality of bits, wherein said encoding device further comprises a zero-crossing detecting circuit for detecting zero voltage points in the AC voltage input and for generating a first trigger signal having a plurality of pulses corresponding to the zero voltage points, said encoder processing one of the bits of the display data each time one of the pulses of the first trigger signal is received thereby;
wherein said encoder includesa control circuit for selecting one of the first trigger signal and the low potential waveform for output as a control signal in accordance with the bit of the display data that is being processed, anda switch controlled by the control signal such that the state of the waveform of one of the signal regions of the encoded signal corresponds to the bit of the display data that is being processed.
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Accused Products
Abstract
A controlled lighting system includes an encoding device and a lamp. The encoding device includes a rectifier for rectifying an AC voltage input to result in a rectified signal, and an encoder for generating an encoded signal from the rectified signal and display data. The encoded signal has consecutive signal regions with a waveform of a positive half-cycle of an AC sinusoidal wave or a low potential. The lamp includes a LED unit and a decoding device. The decoding device includes a direct current converter for extracting a direct current voltage from the encoded signal, a detecting circuit for extracting a wave signal from the encoded signal, a processor for generating decoded data related to a light-emitting operation according to the wave signal, and a driver for driving the LED unit according to the direct current voltage from the direct current converter and the decoded data from the processor.
14 Citations
20 Claims
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1. An encoding device for a light-emitting-diode (LED) lamp, said encoding device being adapted to receive an alternating current (AC) voltage input and display data related to a light-emitting operation, said encoding device comprising:
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a rectifier for rectifying the AC voltage input to result in a rectified signal; and an encoder for generating an encoded signal from the rectified signal and the display data, the encoded signal having an amplitude corresponding to a magnitude of the rectified signal, and a waveform corresponding to the display data, the encoded signal having a plurality of consecutive signal regions of equal time durations, each of the signal regions having one of first and second states, the waveform of the signal region having the first state being a positive half-cycle of an AC sinusoidal wave, the waveform of the signal region having the second state being a low potential waveform; the display data including a plurality of bits, wherein said encoding device further comprises a zero-crossing detecting circuit for detecting zero voltage points in the AC voltage input and for generating a first trigger signal having a plurality of pulses corresponding to the zero voltage points, said encoder processing one of the bits of the display data each time one of the pulses of the first trigger signal is received thereby; wherein said encoder includes a control circuit for selecting one of the first trigger signal and the low potential waveform for output as a control signal in accordance with the bit of the display data that is being processed, and a switch controlled by the control signal such that the state of the waveform of one of the signal regions of the encoded signal corresponds to the bit of the display data that is being processed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An encoding device for a light-emitting-diode (LED) lamp, said encoding device being adapted to receive an alternating current (AC) voltage input and display data related to a light-emitting operation, said encoding device comprising:
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a rectifier for rectifying the AC voltage input to result in a rectified signal; and an encoder for generating an encoded signal from the rectified signal and the display data, the encoded signal having an amplitude corresponding to a magnitude of the rectified signal, and a waveform corresponding to the display data, the encoded signal having a plurality of consecutive signal regions of equal time durations, each of the signal regions having one of first and second states, the waveform of the signal region having the first state being a positive half-cycle of an AC sinusoidal wave, the waveform of the signal region having the second state being a low potential waveform; the display data including a plurality of bits, wherein said encoding device further comprises a zero-crossing detecting circuit for detecting zero voltage points in the AC voltage input and for generating a first trigger signal having a plurality of pulses corresponding to the zero voltage points, said encoder processing one of the bits of the display data each time one of the pulses of the first trigger signal is received thereby; wherein said encoder includes a control circuit for outputting a high potential waveform or a low potential waveform within a time period spanning two corresponding adjacent ones of the pulses of the first trigger signal as a control signal in accordance with the bit of the display data that is being processed, and a switch controlled by the control signal such that the state of the waveform of one of the signal regions of the encoded signal corresponds to the bit of the display data that is being processed. - View Dependent Claims (8)
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9. A controlled lighting system adapted to receive an alternating current (AC) voltage input and display data related to a light-emitting operation, said controlled lighting system comprising:
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an encoding device including a rectifier for rectifying the AC voltage input to result in a rectified signal, and an encoder for generating an encoded signal from the rectified signal and the display data, the encoded signal having an amplitude corresponding to a magnitude of the rectified signal, and a waveform corresponding to the display data, the encoded signal having a plurality of consecutive signal regions of equal time durations, each of the signal regions having one of first and second states, the waveform of the signal region having the first state being a positive half-cycle of an AC sinusoidal wave, the waveform of the signal region having the second state being a low potential waveform; and a lamp including a light-emitting-diode (LED) unit, and a decoding device including a direct current converter for extracting a direct current voltage from the encoded signal, a detecting circuit for extracting a wave signal in digital form from the encoded signal, a processor for generating decoded data related to a light-emitting operation of said LED unit in accordance with the wave signal extracted by said detecting circuit, and a driver for driving said LED unit according to the direct current voltage from said direct current converter and the decoded data from said processor; the display data including a plurality of bits, wherein said encoding device further includes a zero-crossing detecting circuit for detecting zero voltage points in the AC voltage input and for generating a first trigger signal having a plurality of pulses corresponding to the zero voltage points, said encoder processing one of the bits of the display data each time one of the pulses of the first trigger signal is received thereby; wherein said encoder includes a control circuit for selecting one of the first trigger signal and the low potential waveform for output as a control signal in accordance with the bit of the display data that is being processed, and a switch controlled by the control signal such that the state of the waveform of one of the signal regions of the encoded signal corresponds to the bit of the display data that is being processed. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A controlled lighting system adapted to receive an alternating current (AC) voltage input and display data related to a light-emitting operation, said controlled lighting system comprising:
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an encoding device including a rectifier for rectifying the AC voltage input to result in a rectified signal, and an encoder for generating an encoded signal from the rectified signal and the display data, the encoded signal having an amplitude corresponding to a magnitude of the rectified signal, and a waveform corresponding to the display data, the encoded signal having a plurality of consecutive signal regions of equal time durations, each of the signal regions having one of first and second states, the waveform of the signal region having the first state being a positive half-cycle of an AC sinusoidal wave, the waveform of the signal region having the second state being a low potential waveform; and a lamp including a light-emitting-diode (LED) unit, and a decoding device including a direct current converter for extracting a direct current voltage from the encoded signal, a detecting circuit for extracting a wave signal in digital form from the encoded signal, a processor for generating decoded data related to a light-emitting operation of said LED unit in accordance with the wave signal extracted by said detecting circuit, and a driver for driving said LED unit according to the direct current voltage from said direct current converter and the decoded data from said processor; the display data including a plurality of bits, wherein said encoding device further includes a zero-crossing detecting circuit for detecting zero voltage points in the AC voltage input and for generating a first trigger signal having a plurality of pulses corresponding to the zero voltage points, said encoder processing one of the bits of the display data each time one of the pulses of the first trigger signal is received thereby; wherein said encoder includes a control circuit for outputting a high potential waveform or a low potential waveform within a time period spanning two corresponding adjacent ones of the pulses of the first trigger signal as a control signal in accordance with the bit of the display data that is being processed, and a switch controlled by the control signal such that the state of the waveform of one of the signal regions of the encoded signal corresponds to the bit of the display data that is being processed. - View Dependent Claims (20)
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Specification