US Pat. No. 9,060,400

CONTROL APPARATUS INCORPORATING A VOLTAGE CONVERTER FOR CONTROLLING LIGHTING APPARATUS

ARKALUMEN INC., Ottawa (...

1. A control apparatus for a lighting apparatus comprising:
a voltage converter operable to receive an input voltage and generate an output voltage defined between a high voltage rail
and a low voltage rail, the high voltage rail and low voltage rail coupled to the output of the voltage converter; wherein
at least two LED channels coupled in parallel are operable to be coupled between the high voltage rail and the low voltage
rail; and the voltage converter being operable to set the output voltage based at least partially on a voltage control signal,
wherein the voltage converter causes the output voltage to be less than the input voltage by increasing the voltage on the
low voltage rail; and

a control module operable to receive an indication of the current flowing through the voltage converter and provide the voltage
control signal to the voltage converter in response.

US Pat. No. 9,086,435

CIRCUITS FOR SENSING CURRENT LEVELS WITHIN A LIGHTING APPARATUS INCORPORATING A VOLTAGE CONVERTER

ARKALUMEN INC., Ottawa (...

1. A circuit comprising:
a voltage converter operable to receive an input voltage and generate an output voltage defined between a high voltage rail
and a low voltage rail coupled to the output of the voltage converter;

a current sense circuit coupled to the voltage converter at a node to receive a sense current, the current sense circuit comprising
a resistor coupled in parallel with at least one transistor, the at least one transistor being activated during a first state
of the current sense circuit to reduce the resistance of the current sense circuit and being deactivated during a second state;
and

a current determination apparatus coupled to the current sense circuit and operable to sample a current sense voltage at the
node during the second state;

wherein the voltage converter is operable to receive a voltage control signal to selectively allow the sense current to flow
to the current sense circuit and the current determination apparatus is operable to sample the current sense voltage when
the voltage converter is set to allow the sense current to flow to the current sense circuit.

US Pat. No. 9,217,557

APPARATUS AND SYSTEM FOR EMITTING LIGHT USING A GRID LIGHT ENGINE

ARKALUMEN INC., Ottawa (...

1. A lighting apparatus comprising:
a plurality of elongated segments interconnected perpendicularly to form a grid light engine, each segment comprising a plurality
of groups of LEDs such that, when interconnected together, the grid light engine is operable to emit light inwardly to a plurality
of grid squares formed by the segments; and

a back panel light engine comprising a plurality of LEDs, the back panel light engine operable to emit light from its LEDs
through the grid; and

wherein the plurality of groups of LEDs on the segments comprise at least first and second types of LEDs and the plurality
of LEDs on the back panel light engine comprise at least third and fourth types of LED, wherein the first, second, third and
fourth types of LEDs emit different light spectrums.

US Pat. No. 9,345,109

LIGHTING APPARATUS AND METHODS FOR CONTROLLING LIGHTING APPARATUS USING AMBIENT LIGHT LEVELS

ARKALUMEN INC., Ottawa (...

1. A control apparatus operable to control one or more light radiating devices operable to be activated and deactivated; wherein
the control apparatus is operable:
to sample light levels at a plurality of times during which the light radiating devices are deactivated;
to generate an average of the light levels sampled; and
to adjust a luminous intensity for the light radiating devices based at least partially upon the average of the light levels
sampled.

US Pat. No. 9,192,009

LIGHTING APPARATUS AND METHOD FOR DETECTING REFLECTED LIGHT FROM LOCAL OBJECTS

ARKALUMEN INC., Ottawa (...

1. A lighting apparatus comprising:
one or more light radiating devices operable to be activated and deactivated;
a light detection apparatus optically isolated from the light radiating devices and operable to sense light levels local to
the lighting apparatus; and

a control apparatus operable to sample a first light level using the light detection apparatus at a first time during which
the light radiating devices are deactivated; to sample a second light level using the light detection apparatus at a second
time during which the light radiating devices are activated; to determine whether an object local to the lighting apparatus
has caused light from the light radiating devices to reflect back to the light detection apparatus using the first and second
light levels; and to control an aspect of the light radiating devices in response to determining that an object local to the
lighting apparatus has caused light to reflect back to the light detection apparatus.

US Pat. No. 9,918,362

CONTROL UNIT AND LIGHTING APPARATUS INCLUDING LIGHT ENGINE AND CONTROL UNIT

ARKALUMEN INC., Ottawa (...

1. A lighting apparatus comprising:
a light engine comprising: a printed circuit board comprising first and second interconnection layers; and a plurality of
LED groups on said printed circuit board coupled between a power supply input and a respective one of a plurality of return
paths associated with said LED group; each of said LED groups comprising at least one LED set comprising a plurality of LEDs
coupled in series in said first interconnection layer; wherein each of the LED sets are coupled to a respective one of said
plurality of return paths associated with said respective LED group in said second interconnection layer; wherein a first
one of said LED groups is comprised of at least a subset of LEDs having a first colour temperature, and a second one of said
LED groups is comprised of at least a subset of LEDs having a second colour temperature different from said first colour temperature;
and

a control unit coupled between said light engine and a power source having a power supply output coupled to said power supply
input of said light engine and a power supply return; wherein said control unit comprises: a plurality of transistors, one
of said plurality of transistors coupled between each of said return paths and said power supply return; and a controller
operable to selectively activate each of said transistors to allow current to flow from said power supply output through said
associated LED group to said power supply return.

US Pat. No. 9,089,024

METHODS AND APPARATUS FOR CHANGING A DC SUPPLY VOLTAGE APPLIED TO A LIGHTING CIRCUIT

ARKALUMEN INC., Ottawa (...

1. A method comprising:
determining a current level flowing through one or more Light Emitting Diodes (LEDs) within a lighting circuit; and
causing the LEDs to generate a light output that comprises a modulated signal that includes an indication of the current level
flowing through the LEDs.

US Pat. No. 9,578,704

VOLTAGE CONVERTER AND LIGHTING APPARATUS INCORPORATING A VOLTAGE CONVERTER

ARKALUMEN INC., Ottawa (...

1. A control apparatus for a lighting apparatus, the control apparatus comprising:
a voltage converter operable to generate an output voltage defined between a high voltage rail and a low voltage rail coupled
to the output of the voltage converter, the output voltage based at least partially on a voltage control signal received by
the voltage converter, the voltage control signal being high for one or more time slots and low for one or more time slots
within each of a plurality of timing blocks within a fine control period; and

a control module operable to:
set a duty cycle of the voltage control signal to a first value for one or more first timing blocks of the fine control period,
wherein the voltage control signal is high for a first number of time slots within each of the first timing blocks; and

set the duty cycle of the voltage control signal to a second value for one or more second timing blocks of the fine control
period, wherein the voltage control signal is high for a second number of time slots within each of the second timing blocks,
the second number being different than the first number;

wherein the first number of time slots within each of the first timing blocks and the second number of timing slots within
each of the second timing blocks have similar relative magnitudes, whereby the duty cycle across the fine control period has
an average value between the first and second values to provide an increased resolution to control the output voltage from
the voltage converter.

US Pat. No. 9,775,211

CIRCUIT AND APPARATUS FOR CONTROLLING A CONSTANT CURRENT DC DRIVER OUTPUT

ARKALUMEN INC., Ottawa (...

1. A control apparatus adapted to be coupled to a DC power source operable to generate a DC voltage across first and second
nodes to maintain a particular current level flowing through a load coupled between the first and second nodes, the particular
current level being determined at least in part by a detected resistance between third and fourth nodes within the DC power
source, the control apparatus comprising:
a voltage control module adapted to be coupled to the first and second nodes and operable to generate a controlled voltage
independent of the DC voltage generated by the DC power source across the first and second nodes; and

a control module powered by the controlled voltage and adapted to be coupled to the third and fourth nodes, the control module
operable to generate a perceived resistance between the third and fourth nodes;

whereby the control module at least in part controls the particular current level set by the DC power source flowing through
the load coupled between the first and second nodes.

US Pat. No. 9,992,829

CONTROL APPARATUS AND SYSTEM FOR COUPLING A LIGHTING MODULE TO A CONSTANT CURRENT DC DRIVER

ARKALUMEN INC., Ottawa (...

1. A control apparatus adapted to be coupled between a power source and a lighting module, the power source operable to generate an output voltage at a power source output; wherein, if the lighting module is coupled to the power source output, the power source is operable to generate a first output voltage to maintain a constant current level flowing through the lighting module; and, if the lighting module is not coupled to the power source output, the power source is operable to generate a second output voltage at a maximum voltage limit for the power source; the control apparatus comprising:a voltage control module adapted to be coupled to the power source output and operable to convert the output voltage generated by the power source to a controlled voltage independent of whether the output voltage generated by the power source is the first output voltage or the second output voltage; wherein the voltage control module has a maximum input voltage equal to or greater than the maximum voltage limit of the power source; and
a controller powered by the controlled voltage and operable to selectively couple the lighting module to the power source output.

US Pat. No. 10,251,229

LIGHT ENGINE AND LIGHTING APPARATUS WITH FIRST AND SECOND GROUPS OF LEDS

ARKALUMEN INC., Ottawa (...

1. A light engine comprising:a printed circuit board; and
a plurality of LED groups on said printed circuit board; wherein a first one of said LED groups is comprised of at least a subset of LEDs having a first colour temperature, and a second one of said LED groups is comprised of at least a subset of LEDs having a second colour temperature different from said first colour temperature; wherein at least one of said LEDs having a first colour temperature from said first LED group and at least one of said LEDs having a second colour temperature from said second LED group are intertwined on said light engine.