451 results about "Dimmer" patented technology

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.

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.

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 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.

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 #

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.

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.

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 generator configured to generate a first current flowing through one or more light emitting diodes. The one or more light emitting diodes are configured to receive a rectified voltage generated by a rectifying bridge coupled to a TRIAC dimmer. Additionally, the system includes a bleeder configured to receive the rectified voltage, and a controller configured to receive a sensing voltage from the current generator and output a control signal to the bleeder. The sensing voltage indicates a magnitude of the first current.

The invention discloses a backlight control method, a display chip and a backlight module, and the method comprises the steps: determining a current temperature state of a target light-emitting unit connected with a target output channel according to dimming data corresponding to the target output channel in a plurality of first image frames displayed in a first time period, the target output channel is any one of a plurality of output channels of the light modulator; and determining target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, and controlling the backlight brightness of the target light-emitting unit according to the target dimming data. Because the determination of the current temperature state depends on a plurality of dimming data in a period of time, the damage of high temperature to the light-emitting unit can be reduced and the service life of the light-emitting unit can be effectively prolonged by using the dimming data to carry out temperature compensation.

The invention provides an optical module, a debugging method and optical equipment. The optical module comprises a display panel, a first cholesteric liquid crystal film, a first electric control dimming device and a second cholesteric liquid crystal film, the first cholesteric liquid crystal film is arranged on the light emitting side of the display panel, the second cholesteric liquid crystal film and the first cholesteric liquid crystal film have the same circular dichroism, and the second cholesteric liquid crystal film and the first cholesteric liquid crystal film are configured to reflect polarized light with the same rotation direction as the first cholesteric liquid crystal film and transmit polarized light with the rotation direction opposite to the first cholesteric liquid crystal film; the first electric control dimming device is configured to be time division multiplexing, can convert the transmitted polarized light into polarized light with opposite rotation directions in a power-off state, and maintains the polarization state of the transmitted polarized light in a power-on state. According to the optical module, when the polarized light is transmitted and reflected at the first cholesteric liquid crystal film and the second cholesteric liquid crystal film and is emitted from the first electric control dimming device in different polarization states, light loss cannot be generated, and the light emitting brightness and the imaging quality of the optical module can be guaranteed.

The application discloses a dimming data transmission method, a backlight system and a display device. The method comprises the following steps: in a display period of a frame image, after a dimming controller sends a frame start identifier to a dimmer, the dimming controller continuously sends a plurality of dimming data packets to the dimmer, each dimming data packet comprises a synchronization signal and N-bit dimming data, N is a positive integer, and N is greater than or equal to 2; and the dimmer determines target dimming data based on a sampling control signal and the dimming data packet received by the dimmer. By sending the dimming data packet comprising the N-bit dimming data, the transmission of multiple bits of dimming data can be simultaneously performed for each dimming data packet, so that the overall transmission time length of the dimming data is shortened, the transmission efficiency is improved, the probability of level jump in the transmission process is reduced, the EMI problem of the system is alleviated, and the display performance is improved.

A control system may comprise a plurality of audio output devices (e.g., controllable speakers), and a remote control device having at least one button for selecting a preset, where the preset defines different commands for at least two of the audio output devices. The at least two audio output devices may be configured to be controlled according to the different commands (e.g., starting, pausing, or stopping playback, adjusting volume, etc.) in response to an actuation of the button of the remote control device. The control system may also comprise a load control device, such as a dimmer configured to control an intensity of a lighting load to a predetermined intensity in response to the actuation of the button of the remote control device to select the preset. The audio output device may be configured to play a feedback signal indicating an operational characteristic of the dimmer.

The utility model discloses a linear phase-cut dimming LED lamp circuit with a PWM port, which comprises a rectifying circuit, a linear dimming circuit and an LED light-emitting circuit, and is characterized in that the rectifying circuit is used for converting alternating-current voltage which is chopped and modulated by a phase-cut dimmer into direct-current voltage and outputting the direct-current voltage; the linear dimming circuit is used for converting direct current voltage output by the rectifying circuit into corresponding direct current to drive the LED light emitting circuit to emit light, and the linear constant current circuit is used for outputting corresponding direct current to drive the LED light emitting circuit to emit light under the control of an externally input PWM signal; the circuit has the advantage that the circuit can be expanded and applied to linear constant-current LED lamps compatible with dual-mode dimming.

The utility model discloses a multi-angle irradiation lamp structure which comprises a balance weight base plate, a vertical rod fixed on the balance weight base plate and a lamp body arranged at the top end of the vertical rod, and the lamp body comprises a horn-shaped supporting frame, a lamp holder with a lens, a lampshade, a magnetic suction light changing piece and a magnetic ring. The small opening end of the horn-shaped supporting frame is fixed to the top end of the vertical rod. The lamp holder with the lens is electrically connected into the horn-shaped supporting frame and located at the top end of the vertical rod. Through holes are formed in the bottom end and the top end of the lampshade, and the magnetic rings are fixed to the edges of the through holes; the bottom end of the lampshade is limited in the horn-shaped supporting frame, and the magnetic attraction light changing piece is located on the top face of the lampshade and fixed through magnetic attraction of the magnetic ring. The LED lamp is reasonable in structural arrangement, convenient to disassemble, assemble and operate and beneficial to improving the assembling efficiency, light rays of the lamp holder with the lens can irradiate outwards through the lampshade and the magnetic light changing piece, irradiation in different directions can be achieved, the multi-angle irradiation requirement is met, the illumination and decoration effects are improved, and applicability is high.

Faceplate for a rotary dimmer switch

The invention discloses a propeller two-phase flow multi-scale cavitation bubble measurement system based on laser digital holography, and belongs to the field of cavitation flow measurement. The device comprises an experiment section, an experiment model, a supporting rotating shaft, a polarization laser, a concave lens, a first convex lens, a second convex lens, a digital camera, a lens, a dimmer, a synchronous triggering system and a data analysis system. Linear polarization laser is emitted by the polarization laser and is collected by the first convex lens after being expanded by the concave lens, the collected light is collected and collimated by the second convex lens after being collected at the focus of the first convex lens, and parallel light is formed and irradiated to a cavitation area generated by the propeller in the experimental section. Part of the light is diffracted and deviated to form object light when passing through the vacuole, the light which does not pass through the vacuole forms reference light, and alternately dark and bright stripes formed by interference of the object light and parallel light are refracted by the dimmer and the lens and recorded on a digital camera negative film. According to the invention, non-contact measurement of the two-phase flow field of the propeller is realized by using interference recording and diffraction reconstruction.

The utility model discloses a dual-PUSH and dual-stepless dimming and color temperature adjusting multipath constant current output LED power supply. The LED power supply comprises a main circuit, a main control module, a first DC-DC module, a second DC-DC module, a first PUSH dimming module, a second PUSH dimming module, a first stepless dimming module, a second stepless dimming module and an output channel selection module. The first PUSH light modulation module and the second PUSH light modulation module are connected with the main control module and are respectively connected with the first PUSH light modulator and the second PUSH light modulator. The first stepless dimming module and the second stepless dimming module are connected with the main control module and are respectively connected with the first stepless dimmer and the second stepless dimmer; the output channel selection module is connected with the main control module; through the above structure, various combination output selections can be realized, so that one power supply can be compatible with various light modulators, the application range of the power supply is improved, SKUs of manufacturers and dealers are effectively reduced, preparation of many stock is not needed, and the occupied area of a warehouse is reduced.

A multi-modal primary switch 10, such as a wall mounted dimmer switch for lighting devices, provides the capability to operate in different modes depending upon the set-up of associated hardware (e.g.

A smart lighting device may be configured to be controlled in response to control instructions in messages and / or phase-control signals. The smart lighting device may determine whether to respond to the phase-control signal or the control instructions in messages. The smart lighting device may be configured to recognize whether it is electrically connected to a smart load control device or a non-smart load control device. A load control device may determine whether it is electrically connected to a mixed circuit or a non-mixed circuit. When the load control device determines that the circuit is a mixed circuit, the load control device may transmit phase-control signals and control instructions in messages at the same time. The load control device may determine that a smart lighting device has been added (e.g., electrically connected) to the circuit it is electrically connected to.

The utility model relates to the technical field of silicon controlled rectifier dimming, in particular to a multi-color-temperature multi-power switching circuit compatible with silicon controlled rectifier dimming, which comprises a rectifying and filtering module, a silicon controlled rectifier dimming constant-current module, an MCU (Microprogrammed Control Unit) linear power supply module, a power failure detection module, a color temperature control module, a double-path PWM (Pulse-Width Modulation) dimming constant-current module and a load module, the input end of the power failure detection module is electrically connected with the rectification filtering module and used for detecting the power failure condition of the rectification filtering module, and the output end of the power failure detection module is electrically connected with the analog input end of the color temperature control module. The two pulse width modulation ends of the color temperature control module are electrically connected with the two pulse width modulation ends of the double-path PWM dimming constant-current module in a one-to-one correspondence manner, so that not only can a silicon controlled rectifier dimmer be compatible for brightness adjustment, but also the color temperature and the power can be flexibly and conveniently switched at any time; and meanwhile, the problem that the color temperature and the power are switched mistakenly due to the fact that a switch is turned on for several times due to mistakes in the actual use process is solved, and then the use experience of customers is improved.

The present invention discloses a dimmer-style dimming power supply, comprising a housing, a control board disposed within the housing, and multiple operation terminals disposed on the housing. The control board is equipped with an electromagnetic compatibility module, a switching supply power module, a main control module, an output adjustment module, and a dimming control module. By integrating the dimmer with the dimming power supply, the present invention not only reduces wiring, but also features convenient installation, compact structure, and small size, which can greatly reduce costs, with the functions of dimming and color adjustment. In addition, the present invention can also be configured to meet the requirements of the U.S. CLASS2 standard.