Abstract: System and method for providing at least an output current to one or more light emitting diodes. The system includes a control component configured to receive at least a demagnetization signal, a sensed signal and a reference signal and to generate a control signal based on at least information associated with the demagnetization signal, the sensed signal and the reference signal, and a logic and driving component configured to receive at least the control signal and output a drive signal to a switch based on at least information associated with the control signal. The switch is connected to a first diode terminal of a diode and a first inductor terminal of an inductor. The diode further includes a second diode terminal, and the inductor further includes a second inductor terminal.

Abstract: An LED controller is used with a video source and at least one LED unit, and includes a control signal generator and a driver. The control signal generator performs pulse width modulation based on a first clock signal, a second clock signal and a data signal, which is generated by the video source, to generate at least one control signal. The first and second clock signals are independent of a vertical synchronization signal that is generated by the video source. The driver generates, based on the at least one control signal, at least one drive signal that is related to light emission of the at least one LED unit.

Abstract: Systems and methods for an adaptive power drive in an illumination system are disclosed herein. An example method includes (1) analyzing, by one or more processors data in a memory to determine a configuration of one or more LEDs; (2) obtaining, by one or more processors, illumination control instructions for operating the one or more LEDs during one or more illumination cycles; (3) controlling, by one or more processors, one or more switches of an illumination unit in accordance with illumination control instructions; (4) determining, by one or more processors, a current requirement for operating the one or more LEDs in accordance with the illumination control instructions; and (5) setting, by one or more processors, a current control set point of an LED driver to the current requirement.

Abstract: A vehicle lamp system includes an imaging unit, a luminance analysis unit, an illuminance setting unit, a light source unit and a light source control unit. The light source control unit controls the light source unit to periodically form a reference light distribution pattern including at least a part of a fixed illuminance area which does not depend on the illuminance value determined by the illuminance setting unit. The illuminance setting unit determines the illuminance value based on a reference detection result including the detection result of the luminance analysis unit obtained under the formation of the reference light distribution pattern, and updates the illuminance value when the new reference detection result is obtained.

Abstract: An arrangement involving printed conductive traces includes at least a voltage source (Vsupply) and at least one target component, preferably a light-emitting component such as an LED. The arrangement is adapted to produce a current-controlled voltage (VOUT2, Vout) originating from the voltage source, the current-controlled voltage being coupled to the at least one target component, wherein said voltage is dependent on the current (IR,LED, ILED) that is being passed through the target component and said voltage is adaptable to a varying resistance of the arrangement and its features.

Abstract: A mood monitoring device, system and method are provided. The mood monitoring device includes one or more processors; and a storage. The storage stores one or more programs which are configured to be executed by the one or plurality of processors. The one or more programs comprise instructions for performing the following operations: receiving a status message that is sent by a terminal and indicates a mood status of a user, the terminal and the mood monitoring device having a binding relationship; and presenting a message that reflects the mood status of the user in accordance with the status message.

Abstract: Disclosed is a light emitting display apparatus which sets black image data, corresponding to a black image displayed after a normal image is displayed, for each pixel in one frame period on the basis of a characteristic of a light emitting display panel.

Abstract: A lighting device for interior spaces or rooms is provided. The lighting device has a plurality of lighting units that are individually calibrated. Further, the lighting device has a regulating device, which, based on corrected color and/or intensity values, forms a control value with which light sources of the lighting units are actuated in order to achieve a specified color and/or intensity value.

Abstract: A LED driving circuit includes a power factor correction circuit receiving a rectified mains voltage and providing output to a DC voltage bus, a string of LEDs connected in series, a voltage converter receiving input from the DC voltage bus and providing output to the string of LEDs, and a microcontroller. The microcontroller receives a plurality of digital feedback signals from the voltage converter, controls the voltage converter based upon a user desired brightness level and the plurality of digital feedback signals, and receive a plurality of feedback signals from the power factor correction circuit. Based on the plurality of feedback signals, the microcontroller operates the power factor correction circuit in transition mode where the user desired brightness level is above a threshold brightness, and operates the power factor correction circuit in discontinuous mode where the user desired brightness level is below the threshold brightness.

Abstract: A LED driver circuit includes a first voltage drop module, a constant current driving module, a second voltage drop module, a DIP switch module, an auxiliary winding module, a control module and a loading module. The loading module is driven by converting a direct current voltage. The converted direct current voltage is additionally bucked to generate an optimized voltage that powers the DIP switch module and the control module. The DIP switch module selects a level of a predetermined current and in turn outputs an electrical signal to the control module. Therefore, the control module outputs a corresponding pulse signal for regulating a current passing through the loading module. Meanwhile, the control module calculates a required voltage level for driving. And the control module compares the required voltage level with an actual voltage value output by the auxiliary winding module and then determines the working status of the loading module.

Abstract: Disclosed is a semiconductor device for switching power supply control including: a high voltage input starting terminal; a discharger; and an input state detection circuit that includes: a voltage divider; a peak hold circuit; a first comparator which detects generation of a plug removal state; a second comparator which detects generation of a brownout state; a timer circuit; and a control signal generation circuit which generates a signal to turn on the discharger or a signal to stop outputting of a switching control signal, Td1, Td2 and Td3 are set to have a relationship of Td1<Td2<Td3, Td1 being a delay time until the capacitor is discharged, Td2 being a delay time for determining the plug removal state, and Td3 being a delay time for determining the brownout state, and at least the delay time Td2 and the delay time Td3 are measured by a common timer circuit.

Abstract: An analogue dimmer driver for driving an LED lighting element (54) to generate coded light comprises an output component (54) which provides a primary current (ipr), a capacitor (53) connected to the output component, a switch (S1) via which the lighting element is connectable to the current source in parallel with the capacitor. Switching is performed by periodically opening and closing the switch to code information into light generated by the lighting element. The output component has an input configured to receive a dimming signal. Responsive to a change in the dimming signal: i) the primary current is increased so as to increase the average power of the generated light and ii) the duty cycle of the switching is increased by an amount sufficient to prevent the peak level of the current though the lighting element when the switch is closed (ipr+idis) from exceeding a predetermined level (inom).

Abstract: A device includes an analog current division circuit configured to divide an input current into a first current and a second current, and a multiplexer array including a plurality of switches to provide the first current to a first of three colors of LEDs and the second current to a second of three colors of LEDs simultaneously during a first portion of a period, the first current to the second of three colors of LEDs and the second current to a third of three colors of LEDs simultaneously during a second portion of the period, and the first current to the first of three colors of LEDs and the second current to the third of three colors of LEDs simultaneously during a third portion of the period.

Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.

Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: This invention discloses a drive circuit for transmitting data signals on power wire, and such drive circuit comprises: a DC power module, a switching circuit module, a voltage division clamping circuit, a receiving module and a control circuit module; after the switching circuit module and the voltage division clamping circuit module are connected in parallel, one end of them is connected to one end of receiving module, and the other end is connected to one end of DC power module; the other end of receiving module is connected to the other end of DC power module; the control circuit module is connected to the switching circuit module, and controls the conduction and disconnection of switching circuit module; when the switching circuit module is conducted, the DC power module will apply a high voltage to the receiving module through the switching circuit module, and when the switching circuit module is disconnected, the DC power module will apply a low voltage to the receiving module through the voltage divis

Abstract: The purposes of the devices described herein are to provide an LED lighting device capable of efficiently and economically emitting light having a selectable color temperature or a warm-on-dim feature when driven with AC power and to provide LED lighting devices which have an improved power factor and a reduced total harmonic distortion when powered with AC power.

Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light.

Abstract: The present invention provides a method for commissioning of nodes of a network. The method comprises the steps of (S10) receiving, at a first node (30a) of the network, at least one indication message including identification information of a second node (30b) of the network; (S20) receiving, at the first node (30a), parameter information indicating a parameter sensed with at least one parameter sensor associated with the first node (30a); (S30) determining whether the at least one indication message and the parameter information temporarily correlate; and (S40), if a correlation is determined, adding correlation information about the second node (30b) to a register table of the first node (30a).

Abstract: A low-voltage alternating current-based LED light with built-in cooling and automatic or manual dimming. As it is self-cooled with fan failure protection, the light can be safely run in conditions that are near-hostile to its operation, with little possibility of damage. The light is movable along the XY axes of a grid system and can be either fixed in position in the Z axis or can be movable up and down the Z axis. The light can be equipped with either manual dimming using a standard potentiometer, or with automatic dimming via sensors and local network connectivity. The device prevents line-voltage electric shocks as the input voltage is low-voltage AC; in embodiments, about the same voltage as a doorbell, and the input current is 3 A. The device is also self-cooled, and will shut down if its fan is not running so as to prevent thermal overloads.

Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.

Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within red, blue, and green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. The systems can include an additional LED string configured for functional applications that includes a type of LED selected from 380-420 nm violet saturated LEDs, 200-280 nm UVC saturated LEDs, 850-940 nm near-IR saturated LEDs, 580-620 nm amber-orange/red saturated LEDs, and 460-490 nm long-blue saturated LEDs.

Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and yellow/green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: The present invention discloses an LED lamp tube, comprising a driving circuit controlled by a switch when used, the driving circuit comprises: a dimming controller having a switch state monitoring port and a power supply port, and the power supply voltage is gradually formed after the switch is disconnected. When the switch is turned on again, if the supply voltage is between the first set value and the second set value, the output of the drive signal is the same as the signal when the switch is turned off, so that the current flowing through the LED light source remains unchanged. If the supply voltage is lower than the second set value, it outputs a dynamically changing driving signal, so that the current flowing through the LED light source gradually changes from the first extreme value to the second extreme value; and the power conversion unit is configured to receive the drive signal and provide energy to the LED light source.

Abstract: A driver comprises a front-end stage, a back-end stage, and an intermediate controller. The front-end stage comprises a front-end main circuit and a front-end controller, and is configured to rectify an AC input voltage from an external power supply and output a DC bus voltage through output terminals. The back-end stage comprises a buck circuit, and configured to receive the bus voltage from the front-end stage and output a desired DC drive voltage to a load according to an operating voltage of the load. The intermediate controller is configured to obtain a difference voltage signal indicative of an electric potential difference between the bus voltage and the drive voltage, and provide a feedback signal generated based on the difference voltage signal to the front-end controller. The front-end controller controls the front-end main circuit based on the feedback signal to change the bus voltage with change of the drive voltage.

Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light.

Abstract: A voltage control system for an LED operates to dynamically determine and set a minimum permissible voltage on an energy storage device such as a capacitor such that the energy storage device operates at a minimum possible voltage to compensate for component variations and dimming signal variations while maintaining flicker-free operation of the LED.

Abstract: An emergency lighting system (ELS) for an aircraft has a capacitor, at least one of an onboard power system and a ground power unit configured to charge the capacitor, and a light emitting diode (LED) selectively powered by the capacitor.

Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ?380780P(?)V(?)d?=?380780B(?)V(?)d???(1) P(?)/B(?)?1.8.??(2) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.

Abstract: The invention provides a display panel driving circuit and a method for capturing error information thereof. The display panel driving circuit includes a driving circuit, a pixel circuit and a timing controller circuit. The method includes: obtaining LED error information indicating errors caused by an LED of the pixel circuit; driving the LED by the drive circuit to obtain LED and driving circuit error information; obtaining driving circuit error information according to the two error information. The timing controller circuit records the error information and compensates LED attenuation by using the error information.

Abstract: A modular lighting system includes a number of LEDs, a communication module, a driver module, an auxiliary module, and a communication bus. The communication module includes a first port. The driver module includes a second port, rectifying circuitry, and conversion circuitry. The driver module drives the LEDs at the second port in response to information received at the second port. The rectifying circuitry and conversion circuitry convert an AC input signal into a DC power signal that is provided at the second port. The auxiliary module has a third port. The communication module, the driver module, and the auxiliary module are associated with the communication bus such that the driver module supplies DC power over the communication bus and the communication bus provides bi-directional communication.

Abstract: An LED lamp with built-in power supply includes housing provided with a driving power supply; and an LED lamp holder assembly fixedly connected to the outside of the housing and connected to the driving power supply by wires. The housing is provided with a wire slot, and wires connecting the driving power supply can be drawn out from the wire slot and housed in the wire slot, and then connected to the LED lamp holder assembly. The lamp structure sets the driving power supply and LED lamp panel in two separate cavities to avoid the LED lamp panel being in high temperature environment for a long time and extend its service life; the housing is provided with a wire slot, the wire slot can accommodate the wires connecting the driving power supply and the LED lamp panel.

Abstract: A luminaire for disinfecting a target surface includes a disinfecting light source, a non-disinfecting light source, a beam angle adjustor, a motion sensor, and a distance sensor. The radiance of the disinfecting light is calculated based on detected distance to a target surface and beam angle, and may be selected to achieve a predetermined irradiance of the target surface. If no motion is detected by the motion sensor then the disinfecting light source is set to ON and the non-disinfecting light source is set to OFF. If motion is detected and a beam intercept is not detected by the distance sensor then the disinfecting light source is set to DIM and the non-disinfecting light source is set to ON. If motion is detected and a beam intercept is detected then the disinfecting light source is set to OFF and the non-disinfecting light source is set to ON.

Abstract: A lighting device for notification and/or atmosphere creation is disclosed. The lighting device (100) comprises at least one light source (102) arranged for rendering a light output. The lighting device (100) further comprises a detector (104) arranged for detecting a first orientation of the lighting device (100) and a receiver (106) for receiving a first signal from a first device (110).

Abstract: A dimming controller is coupled to receive an out-source current from a dimming interface for each LED driver connected thereto. Based on the out-source current received, the controller can estimate the number of connected LED drivers. When the LED driver(s) are determined to be on based on the received out-source current, the dimming controller generates and transmits a dimming control voltage. The dimming controller is programmable with relationships between the dimming control voltage and operational parameters for the certain type of LED driver and the certain type of LED load. The dimming controller then estimates the power characteristics (e.g., the input power and the output power) of the LED driver and associated LED load based on the programmed relationships. Power characteristics can accordingly be reported to the customer via a dimming controller without requiring specifically designed power measuring devices. Driver failure in the group can be reported in real time.

Abstract: Method for the operation and the expansion of a network of lights, each light in the network including a control module which is assigned to a group, each control module being in communication with a group controller as well as control modules in the same group. The network can be expanded by installing (19) new lights with their associated control modules, and each new control module scans (20) its environment and transmits environmental information to a central server where the environmental information is analysed and the new control modules are allocated (21) into groups. After allocation to a group in which control modules may be moved from one group to another or a new group is formed, the new control modules are available for normal operation. This process is repeated for each new light and associated control module.

Abstract: System and method for providing at least an output current to one or more light emitting diodes. The system includes a control component configured to receive at least a demagnetization signal, a sensed signal and a reference signal and to generate a control signal based on at least information associated with the demagnetization signal, the sensed signal and the reference signal, and a logic and driving component configured to receive at least the control signal and output a drive signal to a switch based on at least information associated with the control signal. The switch is connected to a first diode terminal of a diode and a first inductor terminal of an inductor. The diode further includes a second diode terminal, and the inductor further includes a second inductor terminal.

Abstract: A switched-mode control circuit for correlated color temperature (CCT) based on linear drive LED lighting, including a switched-mode CCT control module, a linear drive control module, and an LED lighting module which is connected with the switched-mode CCT control module and the linear drive module. The switched-mode CCT control module is used to control and adjust the CCT of the LED lighting module, so that the LED lighting module emits light with different CCTs, and it may or may not have a memory function. The linear drive control module is capable of controlling and adjusting illuminance of the LED lighting module. The control circuit has a simple design and enables the adjustment of both the CCT and the illuminance, promoting the user experience.

Abstract: A device includes an analog current division circuit configured to divide an input current into a first current and a second current, and a multiplexer array including a plurality of switches to provide the first current to a first of three colors of LEDs and the second current to a second of three colors of LEDs simultaneously during a first portion of a period, the first current to the second of three colors of LEDs and the second current to a third of three colors of LEDs simultaneously during a second portion of the period, and the first current to the first of three colors of LEDs and the second current to the third of three colors of LEDs simultaneously during a third portion of the period.

Abstract: According to one embodiment, a vehicle lighting device includes a socket; and a light-emitting module provided on one end side of the socket. The light-emitting module includes a substrate having a wiring pattern; a plurality of light-emitting elements that are electrically connected to the wiring pattern and are connected in series to each other; and a plurality of thermistors that are electrically connected to the wiring pattern and are connected in parallel to each other. The plurality of thermistors connected in parallel to each other being connected in series with the plurality of light-emitting elements connected in series to each other.

Abstract: In embodiments, a method and system is provided for streaming lighting effect data wirelessly to a peripheral input device in lighting effect arrays. A current lighting effect array is compared to a previous lighting effect array, and compression is applied to one or more zones of light emitters in the lighting effect array.

Abstract: An embodiment provides a lens comprising: a lens body; and a cavity disposed in the lens body, wherein the outer surface of the lens body comprises a first side surface forming an acute angle with respect to the bottom surface and slopping toward a central axis thereof, an upper surface including a flat area, and an inflection part disposed between the side surface and the upper surface.

Abstract: A lighting device is configured to be connected to a power switch and supply a plurality of light-emitting elements with current and includes: a DC-power supply circuit configured to supply the plurality of light-emitting elements with the current when the power switch is turned on; a switching circuit for switching which light-emitting element or light-emitting elements among the plurality of light-emitting elements is supplied with the current; a detection circuit which detects current or voltage supplied from the DC-power supply circuit; and a control circuit which controls the switching circuit to switch which of the light-emitting element or light-emitting elements from among the plurality of light-emitting elements is supplied with the current, when the power switch is turned from on to off and back to on within a predefined period and the current or the voltage detected by the detection circuit is less than when the power switch is on.

Abstract: The present invention provides a lighting apparatus including a function configuration switch module and a control method therefor. The lighting apparatus may include: a lighting module; a lighting driving module for driving the lighting module; a communication module for performing data communication; a storage module for storing a program for controlling the lighting module, data generated by the program, and unique identification information of a lighting apparatus; a function configuration switch module for outputting a switching function selection signal to perform a bridge setting or releasing function; and a control module controlling the lighting driving module, and the communication module to transmit a signal for configuration or release of a bridge together with the unique identification information of the lighting apparatus.

Abstract: An LED dimming load sudden change suppression circuit is applied to an LED dimming circuit. The LED dimming load sudden change suppression circuit includes a MOS transistor Q1, a sampling resistor R1, an error amplifier U1, and a DC-DC module U2, which can ensure that the total current of the LED dimming circuit is constant and avoid damage to LEDs.

Abstract: Power control for environmental control components (e.g. lighting, blinds, temperature) is controlled and distributed by a regulated power controller in accordance with user preferences and/or a schedule. The outputs of the regulated power controller include at least one regulator capable of a mixed mode output, operable in any of several output modes that can include DC regulation and pulse width modulation, as well as polarity inversion. The centralized control of electrical power facilitates the coordination of environmental control components for holistic control.

Abstract: A controller for a switching regulator of a LED lighting system has a current monitor, a voltage divider, an integration circuit, and a comparator circuit. The current monitor is used to sense a LED current passing through a current sensing resistor of the switching regulator, and to generate a sensing current. The voltage divider is used to receive the sensing current to generate a first through third divided voltages, wherein the first divided voltage is larger than the second divided voltage, and the second divided voltage is larger than the third divided voltage. The integration circuit is used to compare the second divided voltage with a reference voltage, and to generate an integration voltage across a RC circuit thereof accordingly. The comparator circuit is used to compare the integration voltage with the first divided voltage and the third divided voltage, and to generate a driving signal.

Abstract: The invention relates to a clocked flyback converter circuit for directly operating lighting means comprising: a transformer (5), which has a primary winding (4), which is coupled to a controllable switch (7), and a secondary winding (6), to which the lighting means (11) can be coupled; a control unit (14) for controlling the switch (7); and means (8) for directly or indirectly sensing the current through the switch (7) in the switched-on state and for feeding a signal and reflecting said current to the control unit (14).