Abstract: A lighting assembly having a base body configured as a heat sink (18) having a front surface (18a), a board (14) carrying a light radiation source (12) applied on the front surface of the heat sink, and a fixing element (20) mounted on the front surface of the heat sink with the board arranged therebetween. The fixing element includes a window (22) which leaves at least partly uncovered the light radiation source, such window having side walls (220) which surround the light radiation source and spread outward to form a reflector for the light radiation.

Abstract: A lighting device may include: a cover in which a circuit board mounted with multiple lighting modules is provided, an end cap which is used to close the cover at least one end of the cover, as well as adhesive sealant, wherein the end cap includes a first portion that can be closely mounted into the cover and a second portion at the outside of the cover, and the second portion is configured to form a recess, the adhesive sealant encapsulate the cover and seal the end cap by flowing into the recess.

Abstract: A current correction circuit (200) has an input (201) and includes: a first controllable current source (220) having an input connected to the circuit input for drawing a first current (I 220) from the circuit input; a differentiator (210) having an input coupled to the circuit input and having an output coupled to the first current source; and/or a second controllable current source (240) having an input connected to the circuit input for drawing a second current (I 240) from the circuit input; a voltage comparator (230) having a first input coupled to the circuit input (201), having a second input coupled to receive a reference signal (Vref), and having an output coupled to the second current source. The circuit is responsive to voltage changes by drawing first current pulses (221) from the circuit input, and/or to low voltages by drawing second current pulses (241) from the circuit input.

Abstract: Illumination converters that are capable of converting light from one geometrical format to another is provided. In particular, the described illumination converters are capable of converting a circular source such as an LED to a linear source useful in an edgelit waveguide, which can be used in a backlight for a display.

Abstract: Systems and methods for driving solid state light sources are provided. A first drive circuit is configured to generate a drive current to cause a first solid state light source load and a second solid state light source load to illuminate. A feedback and control circuit is configured to receive feedback from the first solid state light source load and to control the drive current through the first solid state light source load based on the feedback. A second drive circuit is configured to control the drive current through the second solid state light source load. A master controller is configured to provide a first input to the feedback and control circuit to control the drive current through the first solid state light source load and a second input to the second drive circuit to control the drive current through the second solid state light source load.

Abstract: A light emitting element drive device includes: a light emitting section having a light emitting element; output capacitance capable of storing power supplied to the light emitting section; a driver connected between the light emitting section and a reference potential and including a switch section whose conductive state is controlled by a pulse-like lighting signal depending on magnitude of a load current and a constant current source section connected in series to the switch section; and a power supply controller being a power supply that provides drive power to the light emitting section and including a function to adjust an output current supplied to the output capacitance. The power supply controller changes the supply amount of the output current for the light emitting section from the power supply controller based on load current information that is necessary peak power of the light emitting section.

Abstract: Light for motor vehicles and the like provided with a lighting device comprising a pair of power supply lines flowed through by a primary supplying current, two or more lighting branches each comprising one or more light sources adapted for being flowed through by a secondary supplying current; and an electronic control circuit configured to determine the secondary current flowing through each lighting branch; limit the primary supplying current to a predetermined minimum value when the secondary current flowing through at least one of said lighting branches is lesser than a predetermined threshold current; control the simultaneous transition of the light sources from a pre-lighting state to a complete-lighting state, when each of the secondary currents flowing through the lighting branches is greater than or equal to the predetermined current threshold.

Abstract: The present invention relates to a gate driving circuit, and a array substrate and a display using the same.

Abstract: A liquid crystal display apparatus includes an LED backlight module incorporated therein, and the LED backlight module includes a boosting circuit for receiving a direct current voltage, boosting the direct current voltage, and then outputting a step-up direct current voltage; an LED string, including a plurality of LEDs connected in series, for receiving the step-up direct current voltage from the boosting circuit; a constant current driver circuit for generating a signal used for controlling the boosting circuit; and a amplified circuit for receiving the direct current voltage, magnifying the signal from the constant current driver circuit, and then outputting a magnified signal to the boosting circuit. The power consumption of the boosting circuit is reduced by adding the amplified circuit for amplifying a driving voltage to the boosting circuit.

Abstract: A High Frequency light source has a central body of fused quartz, with a central void, filled with a fill in the void of material excitable by High Frequency energy to form a light emitting plasma. An inner sleeve of perforate metal shim extends along the length of the central body to provide a launching gap. The sleeve has a transverse end portion extending across the other, inner end of the central body. An outer cylinder of fused quartz with an internal bore such as to be a sliding fit with the inner sleeve, itself a sliding fit on the central body. An outer sleeve of perforate metal, enclosing the outer cylinder and having an end portion extending across the flush, void ends of the quartz body and cylinder and having a skirt extending past the flush over an aluminum carrier, clamped and holding the quartz elements against the carrier.

Abstract: There is provided an apparatus for driving a light emitting diode (LED), capable of distributing current stress applied to the LED. The apparatus includes an LED part including a plurality of LED units respectively including at least one LED, the plurality of LED units being connected in parallel to a power input terminal to which rectified power in sine wave form is supplied, and, among the plurality of LED units connected in parallel, a termination end of the LED unit in a front end being connected to a middle of an adjacent LED unit; and a current source unit including a plurality of current sources respectively connected to termination ends of the plurality of LED units and allowing corresponding current to flow through the plurality of LED units.

Abstract: The present invention discloses a direct type LED backlight and a liquid crystal display thereof. The direct type LED backlight comprises a power converting circuit, which transfers an alternating current voltage generated from an external liquid crystal display into direct an current voltage and outputs it; multiple LED strings connected in parallel, wherein each LED string comprises a predetermined amount of LED connected in parallel, which receives a direct current from the power converting circuit; wherein, the predetermined amount is limited to that the direct current of the LED string emitting light normally is smaller than or equal to the direct current output from the power converting circuit. According to the direct type LED backlight of the present invention, it can avoid using a boost circuit in order to decrease circuit complexity and save costs.

Abstract: A light emitting diode control circuit with synchronization signal includes a signal coupling unit, an operational amplifier, a synchronization and control logic unit, a light signal generating unit, an output logic unit and at least a current output unit. The synchronization and control logic unit sends a synchronization clock signal to the light signal generating unit. The light signal generating unit sends a light control signal to the output logic unit. According to the light control signal, the output logic unit is configured to control the current output unit to drive at least a light emitting diode.

Abstract: A light emitting diode module includes a main base board, a wireless communication module, multiple light emitting diodes, a power output control system and a control unit. The wireless communication module is used for receiving a control signal. The light emitting diodes are disposed on the main base board and include light emitting diodes having at least one color. The power output control system is electrically connected to the light emitting diodes. The power output control system adjusts an amount of current flowing through each light emitting diode to control the light emitting diodes to emit light by adjusting the amount of current. The control unit is electrically connected to the wireless communication module and the power output control system for controlling the power output control system to adjust the amount of current of each light emitting diode.

Abstract: A light string power module is provided for providing power to light strings while replicating a lighting pattern from a first light string in providing said power. The illumination pattern of the first light string, which is not powered by the light string power module, is detected by examining the voltage polarities presented on the leads of a first connector to which the first light string is attached. These detected polarities are replicated by a switching module at matching leads on a second connector to which a second light string is attached. A power processing module accepts input power and provides output DC power to the switching module such that the second light string is powered by said output DC power in concert with the replicated voltage polarities so as to replicate the light pattern presented by the first light string on the second light string.

Abstract: A circuit for powering a LED light source includes a converter and a controller. The converter provides an output voltage, and includes a first switch which is turned on and off alternately according to a driving signal to control a current. The controller generates the driving signal which is a periodic signal having a first state and a second state per time period. The first switch is turned on when the driving signal operates in the first state, and is turned off when the driving signal operates in the second state. The controller modulates a time period of the driving signal and a time duration of the first state, such that a quotient of the time duration squared and the time period is substantially independent of a change of the time period, and the current is substantially independent of the change.

Abstract: Provided is an LED control apparatus for controlling a color temperature of at least one LED light module, and the LED control apparatus includes an LED driver electrically connected to the LED light modules; a power conversion module; and a microcontroller unit electrically connected to the power conversion module to control a current output ratio of the LED driver; the microcontroller unit comprises a first control point connected to the LED driver and second and third control points connected to the LED modules; wherein the second and third control points are electrically connected to current controllers for controlling a current therethrough. By using the microcontroller connected to the LED driver to control the current outputs to the LED light modules, the current ratio of the LED light modules can be effectively controlled in order to change the color temperatures of the LED light modules.

Abstract: A backlight module includes: a backplane, a backlight source arranged inside the backplane, a light guide plate arranged inside the backplane to correspond to the backlight source, a reflector plate disposed on a bottom of the light guide plate, an optic film disposed on a top of the light guide plate, and elastic members mounted to the backplane. The optic film has a top edge forming suspension sections and two first sidewalls respectively at left and right sides and each forming lugs. The suspension sections form first through holes. The lugs form second through holes. The backplane forms suspending pegs corresponding to the first through holes. The first through holes are mounted on the suspending pegs and the elastic members securely hold the second through holes and are mounted to the backplane so as to fix the optic films on the light guide plate.

Abstract: An LED light-adjustment driver module includes a duty cycle detection unit, a current output unit, a comparator and a capacitor unit. The first input end of comparator is connected to capacitor unit, and the second input end of comparator inputs a default threshold voltage. The duty cycle detection unit is for receiving externally inputted PWM signal and detecting the duty cycle of the PWM signal; when the duty cycle detection unit detects the duty cycle is less than a default threshold, the current output unit increases the output current or the capacitor unit reduces the capacitance provided to reduce the time for the voltage of the capacitor unit to reach the threshold voltage. Hence, the charging speed of the capacitor unit can be increased.

Abstract: An LED constant-current drive circuit includes a BUCK circuit consisting of a transformer T1, a diode D9, a capacitor C5 and a field effect transistor Q1; a voltage limiting circuit consisting of a resistor R1, a diode D8, a capacitor C1, a resistor R3, a triode Q2, a zener diode DZ1 and a diode D10; and a current limiting circuit consisting of a resistor R4, a triode Q3, a triode Q4 and a resistor R2. When the transistor Q1 is turned on, a current flows through a primary side of the transformer T1 and an LED load, and then flows through the transistor Q1 and the resistor R2, and then flows back to a negative electrode of a power supply. When the transistor Q1 is turned off, the current flows through the primary side of the transformer T1, the LED load and the diode D9, thus forming a loop.