598 results about "Dimmer" patented technology

A knob-type dimmer, including a housing; a circuit board; a switch; a trigger, partially exposed to the outside of the dimmer and moves in response to external forces to trigger or release a switch to control electrical connection or disconnection because the dimmer and a power source; an electrical connection matching component; a first mounting match portion; a knob assembly, including a base, a knob, and an electrical connection component, the base including a first mounting portion which cooperates with the first mounting match portion to mount the knob assembly to the housing, where the electrical connection component cooperates with the electrical connection matching component; a second mounting match portion; a face cover, including a second mounting portion which cooperates with the second mounting match portion to mount the face cover to the housing and to at least partially cover the base.

System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.

The invention discloses an illumination intensity self-adaptive tunnel illumination photovoltaic power supply system and an implementation method, and the system comprises a photovoltaic power generation panel which outputs a DC voltage to supply power to tunnel LED lamps, the illumination of each LED lamp is adjusted through a respective LED light modulator, the LED light modulators are connected with a PLC through a 3 # bus unit CAN3, the PLC transmits an illumination adjustment signal to the LED light modulators through the 3 # bus unit CAN3, and the LED light modulators are connected with the photovoltaic power generation panel. The output power can be adjusted from 0% to 100%, so that the illumination of the LED lamp is changed from 0% to 100%; an illuminometer is mounted outside the tunnel to detect the ambient illuminance outside the tunnel; a plurality of illuminometers are installed in each illumination area in the tunnel, and the actual illuminance of each area can be detected; all the illuminometers are connected with the PLC through the 1 # bus unit CAN1, data of each illuminometer is transmitted to the PLC in real time through the 1 # bus unit CAN1, the characteristics of photovoltaic power generation and tunnel illumination are combined, the illumination intensity outside a tunnel is detected, the illuminance of lamps in all areas in the tunnel is dynamically adjusted, and the illumination of all the areas is switched on and off according to the traffic flow and the vehicle position.

An emergency lighting device with an auto-dimming detection function and used in an inverter system is provided. After receiving sensing signals from a sensor, a control unit of an emergency lighting device outputs signals for control of a dimmer to carry out dimming of a light source and control output power. No matter how many light emitting diodes are mounted in a light emitting diode module of the light source, a battery is further controlled to maintain a fixed output current by control of light brightness of the light source. Thereby not only luminous flux of the light source can be calculated accurately, use and arrangement of the emergency lighting device are easier. Installation cost is significantly reduced and manufacturers can label service time of the device accurately. The emergency lighting device is safer and more convenient to use.

The utility model relates to a rear-phase-cut single-live-wire type wall light modulator, which comprises an MOS (Metal Oxide Semiconductor) tube switch loop unit, a singlechip control unit and a direct-current power supply unit, the MOS tube switch loop unit comprises a wiring terminal J2 connected with an MOS tube Q1, a grid electrode of the MOS tube Q1 is connected with four resistors in series in sequence and then is connected with an MOS tube Q2, a drain electrode of the MOS tube Q2 is connected with a diode D2, the diode D2 is connected with a diode D1, a fixed end contact of a single-pole double-throw switch is connected with the MOS tube Q2, and two movable end contacts of the single-pole double-throw switch are connected with the wiring terminal J1 and the wiring terminal J3 respectively; the direct-current power supply unit comprises an alternating-current voltage waveform acquisition circuit, a direct-current voltage drop circuit, an overcurrent protection circuit and a filtering voltage stabilizing circuit; according to the single-chip microcomputer control unit, a linear sliding potentiometer is connected with the PC2 end of a single-chip microcomputer after being connected with a resistor in series, the linear sliding potentiometer and a rotary potentiometer are sequentially connected between the output end of the direct-current power supply unit and the ground in series, a triode Q6 is connected with a triode Q5 and then connected with the collector electrode of a triode Q7, and the base electrode of the triode Q7 is connected with the PA6 end of the single-chip microcomputer after being connected with a resistor in series.

The invention belongs to the technical field of light modulator control, and particularly relates to a distributed LED lamp control system based on light modulator control, which analyzes the physical position of each lamp in a place through a power line carrier phase difference, synchronously fuses the illuminance, target density and gas concentration data of the corresponding position, generates a coordinate-bound logic scene label, and displays the coordinate-bound logic scene label. And dynamically generating a dimming instruction of each lamp in a place based on label multi-dimensional feature fusion, performing dimming instruction set classification according to a lamp driving protocol type, realizing instruction issuing in combination with communication window segmentation control and a dimming parameter sorting strategy, performing brightness adjustment after analysis by a lamp terminal, and in the process of controlling the lamp by a dimmer, adjusting the brightness of the lamp by the dimmer. Driving current fluctuation is monitored in real time, local compensation is executed, a constant-current standby mode is switched when abnormity is detected, cooperative control, system linkage brightness adjustment and emergency early warning of a single light modulator on multiple types of lamps in a large area are achieved, and the safety response capacity of the system to a complex environment is improved.

The utility model discloses an LED lamp strip dimmer, and particularly relates to the technical field of lamp strips, the LED lamp strip dimmer comprises a dimmer body, the dimmer body is used for carrying out dimming processing on a lamp strip, one end of the dimmer body is provided with a waterproof locking ring, and one end of the waterproof locking ring is provided with an electric wire; the anti-falling assembly is used for firmly connecting the joint of the electric wire and the waterproof locking ring, the anti-falling assembly comprises an anti-falling cylinder installed outside the waterproof locking ring and the electric wire and a connecting ring fixed in the anti-falling cylinder, and the connecting ring is connected to the exterior of the waterproof locking ring in a sleeving mode; according to the utility model, through the arrangement of the anti-drop assembly, stable fixation between the electric wire and the waterproof locking ring can be realized, so that the electric wire is ensured to be stably kept at a required position, and the problem of poor contact caused by loosening of the electric wire and the waterproof locking ring due to repeated bending or pulling between the existing electric wire and the waterproof locking ring is solved; stable transmission of signals of the light modulator can be achieved, and the light modulator can conveniently and stably adjust the lamp strip.

A circuit device includes a luminance analysis circuit and a dimmer circuit. The luminance analysis circuit performs luminance analysis on image data of an input image to output luminance information. The dimmer circuit determines light source luminance information indicating light-emission luminance of each of light source elements according to the luminance information. The dimmer circuit determines the light-emission luminance of the light source element from the luminance information of a pixel by using a weight corresponding to a distance between the pixel and the light source element. The dimmer circuit sets an attenuation degree of the weight with respect to the distance to a first attenuation degree when a global dimming parameter is a first value. The dimmer circuit sets the attenuation degree to a second attenuation degree higher than the first attenuation degree when the global dimming parameter is a second value smaller than the first value.

A circuit device includes a luminance analysis circuit and a dimmer circuit. The luminance analysis circuit performs luminance analysis on image data of an input image to output luminance information. The dimmer circuit determines light source luminance information indicating light-emission luminance of each of light source elements according to the luminance information. The dimmer circuit determines the light-emission luminance of the light source element from the luminance information of a pixel by using a weight corresponding to a distance between the pixel and the light source element. The dimmer circuit sets an attenuation degree of the weight with respect to the distance to a first attenuation degree when a global dimming parameter is a first value. The dimmer circuit sets the attenuation degree to a second attenuation degree higher than the first attenuation degree when the global dimming parameter is a second value smaller than the first value.

A lighting apparatus includes an isolation transformer, an output rectification and voltage regulation circuit, an output current limiting and filtering circuit, and a signal detection and generation circuit. The homonymous terminal of the primary side opposes the homonymous terminal of the secondary side. The output rectification and voltage regulation circuit is connected to the secondary coil of the isolation transformer. The output rectification and voltage regulation circuit rectifies and stabilizes the voltage signal output by the isolation transformer. The output current limiting and filtering circuit is connected to the dimmer and the output rectification and voltage regulation circuit. The output current limiting and filtering circuit adjusts the output current and output voltage according to the operation of the dimmer, and the output current limiting and filtering circuit limits and filters the signal output by the output rectification and voltage regulation circuit.

The present application relates to a liquid crystal dimming device, comprising a substrate coated with a transparent conductive layer and a liquid crystal composition with a dichroic dye added thereto sandwiched between the substrates; the resulting liquid crystal dimming device can have at least two stable states that remain basically stable after the voltage is removed, at least one of which is that the arrangement of liquid crystal molecules is basically orderly, and at least one is that the arrangement of liquid crystal molecules is multi-domain and disordered; an external voltage is applied so that the arrangement of liquid crystal molecules can be quickly switched between the above-mentioned stable states, and a liquid crystal molecule arrangement different from the stable state can also be obtained; the above-mentioned liquid crystal dimming device can adjust the incident light between a highly clear and transparent minimum absorption and minimum scattering state to a privacy state of maximum absorption and maximum scattering state, while realizing zero power consumption privacy protection and zero power consumption clear and transparent states, obtaining excellent solar radiation energy regulation and energy-saving intelligent dimming glass that can quickly switch between high-definition transparent and privacy protection states.

System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current regulation circuit coupled to a cathode of one or more light emitting diodes. The one or more light emitting diodes include the cathode and an anode configured to receive a rectified voltage. Additionally, the system includes a control circuit coupled to the cathode of the one or more light emitting diodes. The control circuit is configured to receive a first voltage from the cathode of the one or more light emitting diodes, compare a second voltage and a threshold voltage, and generate a control signal based at least in part on the second voltage and the threshold voltage. The second voltage indicates a magnitude of the first voltage.

The invention provides a rear-phase-cut single-live-wire type wall light modulator. The rear-phase-cut single-live-wire type wall light modulator comprises an MOS tube switch loop unit, a single-chip microcomputer control unit and a direct-current power supply unit. Wherein the direct current power supply unit comprises an alternating current voltage waveform acquisition circuit, a direct current voltage drop circuit, an overcurrent protection circuit and a filtering voltage stabilizing circuit. The single-chip microcomputer control unit comprises a single-chip microcomputer, a potentiometer, a triode Q6, a triode Q5 and a triode Q7, the PC2 end of the single-chip microcomputer is connected with the potentiometer, when the resistance value of the potentiometer changes, the voltage collected by the PC2 end changes, and the PA6 end of the single-chip microcomputer outputs different voltage signals to control the on-off of the triode Q6, the triode Q5 and the triode Q7 so as to adjust the on-off time of the MOS tube; the output end of the alternating current voltage waveform acquisition circuit is connected with a PC1 port of the single chip microcomputer to provide a phase reference; after alternating current passes through the direct current power supply unit, 5V direct current is output and is connected with a VDD end of the single chip microcomputer to supply power to the single chip microcomputer; the light modulator can stably modulate light at low brightness.

Components and circuitry for controlling a bank of LEDs based on a dimmer switch and a CCT controller to maintain a brightness level while changing the color temperature of an emitted composite light, to adjust a brightness level simultaneous to changing the color temperature of the emitted composite light, and to drive the bank of LEDs to generate the composite light based on selection of one or more CCT setpoints of the CCT controller.

The embodiment of the invention discloses a stray light testing method and device for a vehicle-mounted image acquisition module, equipment and a medium. Comprising the following steps: acquiring a pixel image, a first brightness image and a second brightness image corresponding to a preset light source; wherein the pixel image is acquired by a to-be-detected vehicle-mounted image acquisition module, and the to-be-detected vehicle-mounted image acquisition module comprises a first lens; the first brightness image is collected by a first brightness meter composed of a preset sensor and a second lens, and the second brightness image is collected by a second brightness meter composed of a preset sensor and a first lens; and determining the energy level of stray light in the to-be-detected vehicle-mounted image acquisition module based on the pixel image, the first brightness image and the second brightness image. According to the scheme, the energy level of the stray light is directly determined by adopting a method of matching the brightness meter with the vehicle-mounted image acquisition module to be detected instead of using a dimmer and approximately calculating the energy level by adopting a pixel value and the dimmer, and any intermediate conversion and attenuation process does not exist, so that the accuracy of the magnitude of the stray light energy is improved.

The utility model discloses a Bluetooth light modulator and a light modulation system, and aims to solve the technical problem that the voltage control characteristic and the multi-device use consistency of an existing light modulation method are poor. The system comprises Bluetooth dimmers which are electrically connected with light source equipment to be controlled respectively, a mobile control terminal which is in Bluetooth communication connection with the Bluetooth dimmers, and a wireless remote controller which is in wireless communication connection with the Bluetooth dimmers. The Bluetooth light modulator comprises a power supply module, a power output module, a voltage sampling unit, a feedback voltage stabilizing module and a Bluetooth main control module, wherein the power output module is correspondingly and electrically connected with a rectifying unit and comprises a PWM (Pulse Width Modulation) control unit; the feedback voltage stabilizing module is electrically connected between the PWM control unit and the voltage sampling unit; and the feedback voltage adjusting module is electrically connected between the Bluetooth main control module and the feedback voltage stabilizing module. The dimmer has the advantages that a good voltage stabilization effect can be kept in a wide voltage regulation range, multiple devices can be controlled at the same time, and control, configuration and regulation are convenient and fast.

The utility model provides a quick connecting plug for a dimmer of an airport navigational lighting system, which relates to the field of electrical technology and comprises an aviation socket, an aviation plug is arranged at one end of the aviation socket, a jack is arranged at one end of the aviation socket, and a pin is fixedly mounted on the inner wall of the aviation plug. According to the utility model, through the arrangement of the protection plate, when the aviation plug and the aviation socket are separated, external foreign matters and impurities can be effectively prevented from entering the plug, the problem of poor contact caused by entering of the impurities into the plug is reduced, the reliability is improved, and the protection plate automatically shields when the plug is not inserted into the socket. When the plug is inserted, the plug automatically slides to give way, and the contact pin is exposed, so that dust can be effectively prevented from entering, meanwhile, faults and abrasion caused by poor contact can be reduced due to the fact that external impurities are prevented from entering, the service life of the connecting plug is prolonged, and the maintenance cost is reduced.

A lighting system includes a power supply circuit configured to generate a drive signal for powering a light source based on an input power signal; a temperature sensor configured to measure a light source temperature corresponding to the light source; a current control circuit coupled to the light source and configured to adjust a current of the light source based on the drive signal and a reference signal; a channel controller configured generate the reference signal based on a dimmer setting, and to generate a compensation drive signal based on the light source temperature; and an auxiliary light configured to generate compensation light for compensating a correlated color temperature (CCT) drift in an output light of the light source based on the compensation drive signal.

System and method for controlling one or more light emitting diodes. For example, the system includes: a current regulator including a first regulator terminal and a second regulator terminal, the first regulator terminal being configured to receive a diode current flowing through the one or more light emitting diodes, the current regulator being configured to generate a sensing signal representing the diode current, the second regulator terminal being configured to output the sensing signal; a bleeder controller including a first controller terminal and a second controller terminal, the first controller terminal being configured to receive the sensing signal from the second regulator terminal, the bleeder controller being configured to generate a first bleeder control signal based at least in part on the sensing signal, the second controller terminal being configured to output the first bleeder control signal.

Apparatus and methods for controlling correlated color temperature (CCT) and lighting intensity in lighting fixtures are described. The CCT and intensity may be controlled independently over conventional AC wiring using a conventional dimmer. A lighting controller that resembles a conventional dimmer and that can be installed in place of a dimmer may be used instead of a conventional dimmer to access more control functionalities, still using conventional AC wiring. Wireless communication with the lighting fixture and / or lighting controller are possible.

The invention provides a dye liquid crystal composition, a liquid crystal dimming device containing the dye liquid crystal composition and application of the dye liquid crystal composition. The dye liquid crystal composition comprises at least one liquid crystal composition A and at least one dichroic dye, and the liquid crystal composition A comprises at least one compound as shown in a general formula I. According to the dye liquid crystal composition and the preparation method thereof, by adopting the compound with a specific structure as shown in the general formula I, the dye liquid crystal composition has a relatively high clearing point, relatively low rotary viscosity, a relatively large dielectric anisotropy absolute value, proper vertical dielectric, relatively low refractive index, relatively good low-temperature storage stability and relatively good low-temperature intersolubility; the liquid crystal dimming device containing the liquid crystal compound has the advantages of better contrast ratio, better transmittance, wider temperature application range, better stability, higher response speed and lower dispersion, and can reduce the glare phenomenon in the dimming fields of buildings, traffic and the like. # imgabs0 #

A lighting circuit and a control method thereof are provided. The lighting circuit includes a triac dimmer connected between an alternating current (AC) input power supply and a rectifier circuit, where the rectifier circuit is configured to output a bus voltage after phase cutting, and further includes a turn-on angle detection circuit configured to detect a turn-on state of the triac dimmer and output a first detection signal that represents a relationship between a turn-on angle of the triac dimmer and a first angle, and a bleeder circuit connected to the rectifier circuit and configured to control turn-off time of the bleeder circuit based on the first detection signal and a sampling signal representing a current of a light-emitting diode (LED) load.

The invention provides a dye liquid crystal dimming device which comprises a pair of transparent conductive base layers and a dye liquid crystal layer arranged between the transparent conductive base layers, and the dye liquid crystal layer is filled with at least one cholesteric liquid crystal composition, at least one elastic constant regulator and at least one dichroic dye; the dye liquid crystal layer has at least three states under an applied voltage, namely a transparent state in which incident light is transmitted to the greatest extent, a dark state in which the incident light is basically transmitted and absorbed, and a shielding state in which the incident light is basically absorbed and scattered, the dark state is still basically stable after the voltage is withdrawn, and the shielding state is still stable after the voltage is withdrawn. The transparent state and the shielding state need to be basically stable by continuously applying voltage; according to the liquid crystal dimming device, the elastic constant regulator is further added into the liquid crystal mixture, so that a dark-state non-uniform texture is eliminated, and meanwhile, the contrast ratio of the device is improved.

The invention provides a controller of a dimming device and a dimming system, the controller of the dimming device comprises a control module and a dimming driving module, the control module is connected with the dimming driving module, and the dimming driving module is connected with the dimming device; the control module is used for waking up the dimming driving module when a dimming device switching trigger condition is met, so that the dimming driving module drives the dimming device to perform state switching; and the control module is also used for sleeping the dimming driving module when a sleeping condition is met, so that the power consumption of the controller is reduced. The controller enables power supply through a battery to be possible by greatly reducing system power consumption.

The utility model provides an LED drive circuit with a night lamp function. The LED drive circuit comprises a compatible dimming chip, a constant current chip, a switching module, a main light source module and an auxiliary light source module. The power supply input end of the compatible dimming chip is used for being connected with an external power supply; the high-voltage end of the compatible dimming chip is connected with the high-voltage end of the constant-current chip and the power input end of the switching module. The compatible dimming chip is used for compensating the bleeder current according to the type of the accessed dimmer; the first output end of the switching module is connected with the main light source module; the second output end of the switching module is connected with the auxiliary light source module. The signal input end of the switching module is connected with an external power supply, generates a switching signal based on the switching state of the external power supply, and switches the main light source module or the auxiliary light source module according to the switching signal; therefore, the loss of a single chip is reduced, and the chip is effectively prevented from heating due to excessive loss.

The invention provides a silicon controlled rectifier detection circuit, an LED driving system and a bleeder current control method, and the circuit comprises a bus voltage detection module which generates a pulse signal corresponding to a jump edge of a bus voltage; the pulse voltage detection module is used for generating a front switching or back switching judgment signal of the silicon controlled rectifier and triggering a reset signal; the counting module is used for counting the period of the bus voltage and resetting the counting result when the reset signal is valid; and the discharge control module generates a first control signal when the counting result is smaller than a preset value, and generates a second control signal when the counting result is larger than or equal to the preset value, the first control signal controls a subsequent circuit to perform discharge current control, and the second control signal controls the subsequent circuit to turn off the discharge current. The front-cut dimmer and the rear-cut dimmer are identified, and the compatibility of the silicon controlled rectifier is improved; misjudgment caused by a large phase angle of the silicon controlled rectifier is avoided; the anti-interference performance is high; the system is simple in design and small in chip area.

An illumination device and method are provided for controlling light-emitting diodes (LEDs). The LEDs (specifically, the LED loads) are controlled, e.g., brightness and color of the LED loads, independent of a phase-cut dimmer applied to the AC mains feeding a DC power supply. The power supply is active dependent upon the duration of a conduction angle supplied from the dimmer. The power supply, however, produces drive currents that are independent from the conduction angle by using a two-stage power supply and a relatively slow and fast control loops that are controlled through a microprocessor-based control circuit. Parameters stored in the control circuit are drawn by the microprocessor to control the two-stage power supply to produce the drive currents independent and decoupled from the conduction angle yet dependent on the controller parameters.

System and method for controlling one or more light emitting diodes. For example, the system includes: a phase detector configured to process information associated with a rectified voltage generated by a rectifier and related to a TRIAC dimmer, the rectified voltage corresponding to a first waveform during a first half cycle of an AC voltage and corresponding to a second waveform during a second half cycle of the AC voltage, the phase detector being further configured to generate a phase detection signal representing a first time duration during which the first waveform indicates that the rectified voltage is larger than a predetermined threshold and representing a second time duration during which the second waveform indicates that the rectified voltage is larger than the predetermined threshold; and a mode detector configured to process information associated with the rectified voltage.

The invention relates to a partition control method based on a polymerized disperse dye liquid crystal dimming film, and belongs to the technical field of dimming films. The method comprises the steps that voltage control is conducted on conducting layers of the dimming device through a voltage adjusting device, the conducting layers are composed of a first conducting layer and a second conducting layer, each conducting layer comprises a plurality of independent control areas, and the first conducting layer and the second conducting layer are each provided with an electrode unit and are electrically connected with electrodes of the voltage adjusting device. The voltage adjusting device is based on phase angle control of an alternating current power supply, and the effective value of the input voltage is changed by adjusting the trigger conduction angle of the electrode unit in the independent control area, so that fine regulation and control of the light transmittance and haze of the dimming film are realized. The method solves the problems of step abrupt change and power grid sensitivity of traditional dimming film partition control, realizes accurate partition control, improves the consistency of the dimming effect, and reduces the complexity and cost of the system.

The invention relates to the technical field of LED lighting, and discloses an LED linear constant current circuit with a silicon controlled rectifier dimming function and small night lamp lighting, which comprises a rectification unit, a silicon controlled rectifier dimmer unit, a main lamp lighting unit, a night lamp lighting unit and a night lamp control unit, and is characterized in that the main lamp lighting unit and the night lamp lighting unit are compatible with the silicon controlled rectifier dimming function; wherein the night lamp control unit comprises a control chip U2 of which the model is PM2042; in actual use, compared with an existing constant-current driving circuit with a silicon controlled rectifier dimming function and a night lamp, the constant-current driving circuit has the advantages that the control chip U2 with the model of PM2042 is arranged, and a corresponding peripheral circuit is matched for the control chip U2, so that the lighting control of the night lamp lighting unit is realized, the whole structure is simple, a single chip microcomputer and a power supply chip do not need to be additionally arranged, and the cost is low. The cost is low and the practicability is better.