# US 2014/0152181 A1 · Music Synchronized Light Modulator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152181 A1 - Document ID: US20140152181A1 - Status: Published application - Kind: A1 - Application number: 14/092,895 - Filed: 2013-11-27 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Inventors: Scott Burkhart - Web page: https://patentgrep.com/patent/US20140152181A1 ## CPC - H05B 47/155: Coordinated control of two or more light sources - H05B 45/10: Controlling the intensity of the light - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract The subject matter disclosed herein relates to a system for controlling strings of lights. This system can include a host controller, one or more strings of lights, and an effects modulator. Each string of light can include at least one LED light. The effects modulator can be operatively connected to the host controller and to the strings of light. The effects modulator can include a microcontroller and an inverter. The inverter can include a high side driver circuit and one or more low side driver circuits operatively connected to the high side driver circuit. Each low side driver circuit can be operatively connected to one of the strings of light. The microcontroller can be configured to receive one or more control signals from the host controller and control the strings of light via the inverter in accordance with the control signals. Related apparatus, methods, and techniques are also described. ## Claims ### Claim 1 A system comprising: a host controller; one or more strings of light, each string of light comprising at least one LED light; and an effects modulator operatively connected to the host controller and to the one or more strings of light, the effects modulator comprising: a microcontroller, and an inverter, the inverter comprising a high side driver circuit and one or more low side driver circuits operatively connected to the high side driver circuit, each of the one or more low side driver circuits operatively connected to one of the strings of light, wherein the microcontroller is configured to receive one or more control signals from the host controller and control the one or more strings of light via the inverter in accordance with the one or more control signals. ### Claim 2 (depends on 1) The system of claim 1, wherein the high side driver circuit further comprises a first side having a first switch and a second side having a second switch, and wherein the microcontroller is configured to connect the first switch and the second switch to a DC voltage source in accordance with a predetermined pattern. ### Claim 3 (depends on 2) The system of claim 2, wherein the predetermined pattern connects the first switch to the DC voltage source during a first half of a drive frequency and connects the second switch to the DC voltage source during a second half of the drive frequency, and wherein the first switch and the second switch are configured to provide high side drive waveforms to the one or more low side driver circuits. ### Claim 4 (depends on 3) The system of claim 3, wherein the one or more low side drivers circuits are configured to receive the high side drive waveforms from the first switch and the second switch and turn on the one or more strings of light by staggering a turn on time for the one or more strings of light using the high side drive waveforms. ### Claim 5 (depends on 4) The system of claim 4, wherein the turn on time for the one or more strings of light are staggered by 25 nanoseconds to 694 microseconds. ### Claim 6 (depends on 2) The system of claim 2, wherein the first switch and the second switch are MOSFETs. ### Claim 7 (depends on 1) The system of claim 1, wherein one or more diodes are disposed between the high side driver circuit and the one or more low side driver circuits, the one or more diodes electrically isolating the one or more low side driver circuits from each other. ### Claim 8 (depends on 1) The system of claim 1, further comprising a power supply, wherein the inverter is configured to operate at a drive frequency that is greater than a frequency of a line voltage connected to the power supply. ### Claim 9 (depends on 8) The system of claim 8, wherein the power supply is configured to maintain a fixed potential relative to the effects modulator while a potential relative to earth ground floats. ### Claim 10 (depends on 1) The system of claim 1, wherein the effects modulator is operatively connected to the host controller by a hardwired link or a wireless communication link. ### Claim 11 (depends on 10) The system of claim 10, wherein the hardwired link is an opto-isolator link or a fiber optic link. ### Claim 12 (depends on 1) The system of claim 1, further comprising: a zero crossing interrupt operatively connected to the microcontroller, the zero crossing interrupt configured to resynchronize the microcontroller to operate at a predetermined frequency. ### Claim 13 (depends on 1) The system of claim 1, further comprising: an over current interrupt circuit operatively connected to the microcontroller, the over current interrupt circuit configured to interrupt the microcontroller and disable at least one of the high side driver circuit or the one or more low side driver circuits when a fault condition is detected. ### Claim 14 (depends on 1) The system of claim 1, further comprising: an effects editor configured to create one or more light effects waveforms for the one or more strings of light and to transmit the one or more light effects waveforms to the microcontroller. ### Claim 15 (depends on 14) The system of claim 14, wherein the effects editor is further configured to intercept one or more MIDI signals representative of a MIDI event by an input device operatively connected to the effects editor and to transmit the one or more MIDI signals to the effects modulator. ### Claim 16 (depends on 15) The system of claim 15, wherein the MIDI event is a NOTE-ON event, and wherein the one or more MIDI signals comprises information representative of the NOTE-ON event, a channel associated with the NOTE-ON event, a pitch associated with the NOTE-ON event, and a velocity associated with the NOTE-ON event. ### Claim 17 (depends on 16) The system of claim 16, wherein the effects modulator is configured to receive the one or more MIDI signals from the effects editor, copy a light effect waveform corresponding to the received one or more MIDI signals into one or more play buffers in the microcontroller, and modulate the one or more strings of light in accordance with the copied light effect waveform. ### Claim 18 (depends on 1) The system of claim 1, wherein the host controller is configured to transmit one or more timing signals to the effects modulator at predetermined intervals to synchronize the effects modulator with the host controller. ### Claim 19 (depends on 1) The system of claim 1, wherein a pulse width of the one or more low side driver circuits is adjusted to reduce flicker. ### Claim 20 An apparatus comprising: a microcontroller; and an inverter, the inverter comprising a high side driver circuit and one or more low side driver circuits operatively connected to the high side driver circuit, each of the one or more low side driver circuits operatively connected to one of a plurality of strings of light, wherein the microcontroller is configured to receive one or more control signals from a host controller and control the plurality of strings of light in accordance with the one or more control signals. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the high side driver circuit further comprises a first side having a first switch and a second side having a second switch, and wherein the microcontroller is configured to connect the first switch and the second switch to a DC voltage source in accordance with a predetermined pattern, and wherein the first switch and the second switch are configured to provide high side drive waveforms to the one or more low side driver circuits. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the one or more low side drivers circuits are configured to receive the high side drive waveforms from the first switch and the second switch and turn on the one or more strings of light by staggering a turn on time for the one or more strings of light using the high side drive waveforms. ### Claim 23 A method comprising: receiving, by an effects modulator, one or more control signals from a host controller; and controlling, by the effects modulator, one or more strings of light connected to the effects modulator in accordance with the one or more control signals.