409results about "Electric lighting sources" patented technology

A sensor and / or system controller may process an image multiple times at multiple resolutions to detect glare conditions. A glare condition threshold used to determine whether a glare condition exists may be based on the resolution of the image. When the resolution of the image is higher, the glare condition threshold may be higher. The sensor and / or system controller may organize one or more adjacent pixels having similar intensities into pixel groups. The pixel groups may vary in size and / or shape. The sensor and / or system controller may determine a representative group luminance for the pixel group (e.g., an average luminance of the pixels in the group). The sensor and / or system controller may determine a group glare condition threshold, which may be used to determine whether a glare condition exists for the group of pixels and / or may be based on the size of the group.

The utility model discloses an energy feedback type bipolar pulse drive circuit suitable for an excimer lamp. Comprising a direct-current power supply, a first resonant inductor (L1), a second resonant inductor (L2), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a fifth diode (D5), a sixth diode (D6), a seventh diode (D7), an eighth diode (D8), a first resonant capacitor (C1), a second resonant capacitor (C2), a first power switch tube (Q1), a second power switch tube (Q2) and a boosting transformer with a center tap. The drive circuit disclosed by the utility model not only can generate high-frequency bipolar pulse excitation waveforms on the excimer lamp, but also is suitable for various loads in different forms, such as an ozone generator and the like.

The application provides a synergic dynamic lighting method and its adjustable light direct current incandescent lamp, relates to the field of vision and lighting, and aims to ensure that light is uniform and dynamic in the field of vision; the color temperature is strictly imitated candlelight; the core is direct current adjustable light incandescent lamp technology; and the light in the field of vision is mostly non-uniform and static in the present night desktop lighting, and the light quality is never as good as direct current incandescent lamp; this easily leads to eye accommodation laxity and induces axial myopia; the application mainly comprises two direct current incandescent lamp platforms, one of which illuminates a book, and the other of which illuminates a white wall in front of the eyes; the light intensity of each is adjustable to ensure the uniformity of light in the field of vision, so that the fovea and peripheral rod cells of the retina are stimulated at the same time; the two lamps can also realize the synchronous adjustment of illumination according to the program, thereby guiding the dynamic focusing of the eyes and realizing dynamic lighting; the dynamic also reflects the low color temperature mammal lighting imitating candlelight according to the biological clock and the anti-alzheimer's lighting with 40Hz deep frequency flash.

The invention discloses a pulse generation circuit, a sterilization device and a household electrical appliance, and the circuit comprises a rectification unit which is connected with an AC power supply and is used for converting an AC power into a first DC power; the voltage conversion unit is respectively connected with the rectification unit and the energy storage unit and is used for converting the first direct current into second direct current and charging the energy storage unit; the pulse generation unit is used for generating pulse voltage based on the voltage at the two ends of the energy storage unit and providing the pulse voltage to a load; the first voltage detection unit is used for detecting voltages at two ends of the energy storage unit; and the control unit is used for controlling the voltage conversion unit to charge the energy storage unit and outputting a target pulse control signal to control the pulse generation unit to generate a pulse voltage when the voltage at the two ends of the energy storage unit reaches the target voltage so as to trigger the load to start. The circuit can reduce the power supply cost of the load.

The invention relates to the technical field of plasma discharge control, in particular to a hot cathode filament discharge control method and system and controllable nuclear fusion equipment, and the method comprises the steps: obtaining a target arc current value and target discharge time of a hot cathode filament, and calculating a voltage feed-forward value of the hot cathode filament according to the target arc current value and the target discharge time; in response to a discharge control instruction of the thermionic cathode filament, calculating a voltage feedback value of the thermionic cathode filament according to the actual arc current value and the target arc current value of the thermionic cathode filament; and controlling the hot cathode filament to discharge according to the voltage feed-forward value and the voltage feedback value. Therefore, the problems that when the hot cathode filament discharges, due to the fact that the thermal inertia of the filament is large and a control method in the related technology is difficult to adapt to parameter changes under different discharge conditions, plasma discharge response is slow, and adaptability is poor are solved.

A load control device may include a closed-loop gate drive circuit coupled to a semiconductor switch and configured to render the semiconductor switch conductive or non-conductive at a control time during half-cycles of an AC mains line voltage. The gate drive circuit may limit a magnitude of the load current conducted through the semiconductor switch to a maximum current limit. The load control device may include a control circuit that is configured to set the maximum current limit to a second magnitude for a period of time following a control time of the semiconductor switch during a conduction period of a half-cycle of the AC mains line voltage, and set the maximum current limit to a first magnitude after the expiration of the period of time during the conduction period of the half-cycle of the AC mains line voltage.

A control device configured for use in a load control system to control one or more electrical loads may comprise an actuation member having a front surface defining a touch sensitive surface configured to detect a point actuation along at least a portion of the front surface, a touch sensitive circuit, and a control circuit. The touch sensitive device may comprise one or more receiving capacitive touch pads located behind the actuation member and arranged in a linear array adjacent to the touch sensitive surface. The control circuit may be configured to operate using different filtering techniques based on the state / mode of the control device and / or based on whether the positions of point actuations by a user along the touch sensitive surface indicate a fine tune or gross adjustment by the user. For example, the control circuit may generate an output signal using light / no filtering or using heavy filtering.

The techniques described herein relate to systems, apparatus, articles of manufacture, and methods for light generation. An example apparatus for ultraviolet (UV) radiation generation includes a microwave cavity comprising an electrodeless UV bulb, the electrodeless UV bulb comprising a bulb fill capable of emitting UV light, a synthesizer configured to generate a microwave signal, and a solid-state amplifier configured to amplify the microwave signal to generate an amplified microwave signal for igniting the bulb fill to emit UV light.

A shading and illumination system includes a shading device for shading viewing openings, an illumination device for illuminating a room, an external sensor for detecting an external parameter acting on the room, an internal sensor for detecting a 3D image of the room, a position of a person present in the room in the 3D image, and a viewing direction of the person, and a control unit for actuating the shading device and the illumination device. The shading device and the illumination device are actuatable depending on the values measured by the external sensor and by the internal sensor. A light parameter acting on the person is determinable depending on the detected viewing direction, on the detected position, on the 3D image of the room, and on the external parameter. The shading device and / or the illumination device are / is actuatable depending on the light parameter acting on the person.

A ballast transformer and system using the ballast transformer to couple power to a plasma load. The ballast transformer has a magnetic core, a first primary winding on a primary side of the magnetic core, a secondary winding on a secondary side of the magnetic core, and a second primary winding connected in series with the first primary winding and wound in proximity to the secondary winding on the secondary side of the magnetic core. The first primary winding is connectable to the AC power source, and the secondary winding is connectable to the plasma load via a coaxial cable.

An LED lighting device or LED lamp comprising one or more LED packages; and a switch control unit is provided. The switch control unit is configured to operate the one or more LED packages. The switch control unit is in communication with a sensor located in a space, the LED lighting device or LED lamp also being located in the space. The switch control unit is configured to (i) receive a sensor signal from the sensor, (ii) process the sensor signal, (iii) determine an adjustment to the operating light qualities of the LED lighting device or LED lamp based on the processing of the sensor signal and one or more goal light qualities corresponding to the space, and (iv) adjust the operation of the one or more LED packages in accordance with the adjustment.

A system and method monitors a lamp assembly. Image data related to an object of interest is captured with an optical sensor disposed near the object of interest related to the lamp assembly. The image data from the optical sensor is provided to a processing circuit of a lamp monitoring and control device. The image data from the processing circuit can be transmitted to a base station using a transmit unit.

An illumination device (10) includes two illumination sections (22, 24). The first illumination section (22) includes a plurality of illumination elements that are each configured to emit light in a light spectrum, wherein the light spectrum is variable. The second illumination section (24) includes one or several illumination elements that are each configured to emit light in a fixed light spectrum, wherein the fixed light spectrum is white.

A train cabin lighting system for managing the fatigue of a train operator comprises a cabin interior configured to accommodate the operator during operation. The system includes a light-emitting apparatus arranged within the cabin, which comprises at least one light source capable of emitting light at different wavelengths. A control unit is operatively connected to the light-emitting apparatus, and it is configured to control the emission of light based on predefined protocols. The system is characterized by the light-emitting apparatus being configured to emit blue light at a wavelength between 460 nm and 480 nm. Additionally, an adaptive lighting control system dynamically adjusts one or more of the intensity, spectral composition, and emission angle of the light based on real-time feedback from environmental and operator-specific conditions, thereby managing the operator's fatigue.

The application discloses a kind of LEC cold light source application methods combined with IMD, it is related to cold light source application technical field, including the following contents, S1, cold light sheet production: polyester acrylic resin, modified polyurethane, hydroxyethyl acrylate, photosensitizer, auxiliary agent, filler, solvent slurry, dispersing agent and curing agent;S2, dielectric layer preparation;S3, circuit application;S4, correction is carried out: correction circuit carries out power factor correction to filtered mains signal, the pin of correction circuit is MOS tube drive pin, controls MOS tube switch and changes output voltage.The application compared with initial EL cold light sheet, with ultrathin, working state is not heated, light is uniform, good shock resistance, still can emit light after cutting, color is rich and recognition degree is high, easy to use, low power consumption, easy to manufacture, so that it has ultralight, ultrathin, light soft, no ultraviolet, color is various, long life, no heat, strong light and shade color adjusting ability.

A method for operating a discharge lamp by modulating a current signal is presented. The discharge lamp is operated with at least two different frequencies. At first a probability distribution function for a first number of first frequency periods and a second number of second frequency periods is defined. Next, the first number of first frequency periods and the second number of second frequency periods are determined depending on the probability distribution function by at least one random number. The current signal is modulated by applying the first number of first frequency periods and the second number of second frequency periods to the current signal for operating the discharge lamp.

Provided are a fluid treatment device and a lighting circuit that enable an ultraviolet light irradiation unit to stably light up regardless of a treatment state of fluid. The fluid treatment device includes: a lighting circuit that includes a DC power supply, a transformer including a primary winding and a secondary winding, and a switching element, the lighting circuit being configured to cause the secondary winding of the transformer to generate electromotive force in accordance with switching of the switching element between an ON state and an OFF state; an ultraviolet light irradiation unit that includes a first electrode disposed in a light-emitting tube in which a light-emitting gas is sealed, and a second electrode disposed apart from the light-emitting tube, a space into which a fluid to be treated flows being interposed between the first electrode and the second electrode, the ultraviolet light irradiation unit being connected to the secondary winding of the transformer; a detection unit that detects an electric conductivity of the fluid; and a controller that controls a frequency at which the switching element is switched between the ON state and the OFF state on the basis of the electric conductivity of the fluid that has been detected by the detection unit, or a parameter relating to the electric conductivity of the fluid.

The invention provides a high-voltage starting device for a high-pressure gas discharge light source, and the device comprises a power access unit which is used for accessing an external AC power supply; the power supply protection unit automatically cuts off the power supply when the circuit is short-circuited, overloaded or abnormal in voltage; the energy storage resonance unit is electrically connected with the power supply protection unit and comprises an energy storage capacitor and a ballast inductor, and the energy storage capacitor and the ballast inductor form a series resonance circuit; the trigger control unit is connected with the energy storage resonance unit in parallel and comprises a gas discharge trigger tube, and the gas discharge trigger tube is conducted when the voltage at the two ends of the energy storage capacitor reaches a breakdown threshold value; the circulation control unit is connected between the energy storage resonance unit and the high-pressure gas discharge light source in series and comprises a double-metal heat piece switch, and the double-metal heat piece switch is bent and disconnected due to the heat effect when high-voltage pulses flow through and then a loop is closed after cooling and resetting. And the high-voltage output unit is connected with the circulating control unit and the high-voltage gas discharge light source. The starting time of the high-pressure gas discharge light source can be shortened, and the test preparation time is shortened.

The invention discloses an excimer lamp voltage closed-loop control method, device and equipment and a storage medium. The core comprises a current peak detection unit, a peak voltage observer and a closed-loop control unit. Wherein the current peak value detection unit is used for acquiring a current peak value flowing through the excimer lamp in a working period; the peak voltage observer estimates the peak voltage of the excimer lamp in the period in real time to realize accurate observation of the voltage state; and the closed-loop control unit realizes indifference tracking control of the given peak voltage and the estimated peak voltage through a control algorithm according to the given peak voltage and the estimated peak voltage of the excimer lamp, and dynamically adjusts output. The closed-loop control method can effectively restrain interference of parameter changes such as external environment temperature and load fluctuation on peak voltage of the excimer lamp, discharge efficiency reduction caused by voltage deviation is avoided, it is ensured that the excimer lamp is always stably in a high-efficiency discharge state in the full work period, and equipment operation reliability and energy utilization efficiency are improved.

To provide a lighting device for discharge lamp capable of suppressing an out-of-resonance state even in a case where a change of an environmental temperature is considerable, and an irradiation device for vehicle.SOLUTION: A lighting device for discharge lamp applies a drive voltage in a predetermined operation frequency to a discharge lamp. The lighting device for discharge lamp comprises: a switching output circuit which includes a switching element and converts a DC voltage into an AC voltage in the operation frequency; a control circuit where the primary-side coil is electrically connected with the switching output circuit via a capacitor for resonance and the secondary-side coil is electrically connected with a transformer electrically connected with the discharge lamp and the switching output circuit and which generates a drive signal of the switching element; and an operation frequency setting circuit which is electrically connected with the control circuit and includes a resistor and a temperature sensitive element connected in series with the resistor. A resistance value of the temperature sensitive element is reduced when a temperature rises. The control circuit sets the operation frequency based on a value of combined resistance of the resistor and the temperature sensitive element.SELECTED DRAWING: Figure 3

The utility model provides a pulse xenon lamp power supply system and a light-emitting device. The pulse xenon lamp power supply system comprises an energy storage module, a plurality of driving modules and a control module, each driving module comprises a pre-combustion device and a discharging module which are connected with each other; each driving module is connected with the pulse xenon lamp; the energy storage module stores electric energy; the control module receives the starting signal and outputs a pre-combustion high-voltage signal of a pre-combustion device connected with the pulse xenon lamp and a driving square wave signal of a discharge module connected with the pulse xenon lamp; the pre-combustion device is used for releasing a high-voltage pulse for puncturing the pulse xenon lamp according to the pre-combustion high-voltage signal so as to pre-combust the pulse xenon lamp through the high-voltage pulse; and the discharge module conducts the energy storage module and the pulse xenon lamp based on the driving square wave signal. According to the pulse xenon lamp power supply system, the pre-combustion device and the discharging device form a module, a set of pulse xenon lamp power supply system is formed based on the module, and the pulse xenon lamp power supply system can reduce system hardware composition and construction difficulty.

To prevent deterioration and mechanical destruction of a membrane in a light source by suppressing electromigration in the light source.SOLUTION: A light-source driving device 80A includes a light source 2, a power source 800, and an NMOSFET 801, 802, 803, and 804 as a switching element. The light source 2 has a heater layer containing metal, and emits infrared rays based on a power supply voltage applied to the heater layer. The power supply 800 outputs a voltage V as the power supply voltage to the light source 2. The NMOSFET 801 to 804 switches a path of current flowing from the power source 800 to the light sources 2 and alternately drives a direction of the current flowing to the light sources 2.SELECTED DRAWING: Figure 7

An aircraft (2), having a passenger cabin (4) with light sources (6a-h), contains a light module (12) with outputs (14a-e) for the light sources (6a-h), a virtual output field (16) of field locations (Oa-e) over time (t) and location-time control specifications (20a-e), in order to assign light values (LW) to the field locations (Oa-e) and times (t), wherein each of the outputs (14a-e) is assigned a field location (Oa-e) in the output field (16), wherein the outputs (14a-e) control the light sources (6a-h) to emit light (10) according to the light value (LW) at the actual time (ta) at the field location (Oa-e), wherein the control specifications (20a-e) include: a colour value (Fa-e) for the light value (LW), a location interval (OIa-e), and a time interval (ZIa-e), during which, in the location interval (OIa-e), the color values (Fa-e) are admixed to the light values (LW) of the field locations (OA-e) located therein, starting at zero and completely admixed at the end. In a method for operating the aircraft (2), the light sources (6a-h) are connected to the outputs (14a-e), the control specifications (20a-e) are selected in a future time (t) of the operation of the aircraft (2), and the light module (12) is operated at least during the operation of the aircraft (2) such that the light sources (6a-h) emit light (10) according to the associated light values (LW).

A gas sensor (100) is described, which comprises a gas absorption cell (6), configured to house a gas to be detected, an incandescent light bulb (1) comprising a glass bulb (2) and a filament (3) enclosed in the glass bulb (2). The gas sensor (100) also comprises a first detector (4), configured to detect radiation in a first wavelength range of 1-5 um, and a control unit (7), configured to provide a drive current through the filament (3) of the incandescent light bulb (1) during operation of the gas sensor (100). The gas sensor comprises a second detector (5), configured to detect radiation in a second wavelength range of 6-15 µm radiation. The second detector (5) is arranged such that the second detector (5) is illuminated by radiation from the incandescent light bulb (1) during operation of the gas sensor (100).

The utility model discloses an output power self-adaptive control circuit of beauty equipment, which belongs to the technical field of beauty equipment, and comprises a main control chip, a strong pulse light driving module, a temperature detection module, a voltage and current detection module and a touch detection module, and the main control chip adopts a microcontroller; the intense pulse light driving module is connected with a PC2 pin of the main control chip, and the intense pulse light driving module is used for driving and controlling the lightening of the xenon lamp; the temperature detection module is at least connected with PD3, PB1 and PB3 pins of the main control chip, and the temperature detection module is used for sensing temperature; the voltage and current detection module is connected with a PB4 pin and a PB5 pin of the main control chip, and the voltage and current detection module is used for detecting peak voltage and peak current; the touch detection module is at least connected with a PC4 pin, a PC5 pin and a PC6 pin of the main control chip, and the touch detection module is used for detecting the contact condition with the skin.

The invention discloses a light equipment control method and device, a computer readable medium and electronic equipment, the light equipment comprises multiple groups of xenon flash lamps, at least one group of xenon flash lamps is provided with a spectrum adjusting part, and the spectrum adjusting part is used for adjusting the spectrum distribution of light emitted by the xenon flash lamps; the method comprises the following steps: determining target flash power corresponding to each group of xenon flash lamps according to a flash control instruction set for light equipment; wherein the flash parameters comprise at least one of flash power, flash color temperature and flash color; and generating a control signal corresponding to each group of xenon flash lamps according to the target flash power corresponding to each group of xenon flash lamps, so that each group of xenon flash lamps are driven by the corresponding control signal to emit light. According to the technical scheme, the xenon lamp light equipment can be suitable for various different application scenes, so that the use cost of the light equipment can be reduced, and the application scenes of the light equipment can be expanded.

In described examples of a method (400) of controlling an illumination device by an output signal of a DC-DC converter, the output signal is controlled by a PWM signal. The method (400) includes receiving (405) a feedback signal corresponding to variation in the output signal with respect to a predetermined output signal, and determining (410) a target duty cycle of the PWM signal based on the feedback signal. The PWM signal of the target duty cycle is capable of enabling the DC-DC converter to generate the predetermined output signal. The method (400) includes providing (415) the PWM signal of an effective duty cycle equal to the target duty cycle over N switching pulses of the PWM signal to the DC-DC converter. The method (400) provides (415) the PWM signal by providing (420) M switching pulses of a first PWM signal of a first duty cycle, and by providing (425) N-M switching pulses of a second PWM signal of a second duty cycle.

The invention discloses a light source driving circuit for atomic spectrum analysis and a driving method thereof. The light source driving circuit comprises a deuterium lamp driving circuit and a cathode lamp driving circuit, the deuterium lamp driving circuit comprises a first main control circuit, a first rectification circuit, a first energy storage circuit, a first voltage division circuit, a first feedback circuit, a first constant current driving circuit, a first voltage reduction circuit, a first voltage switching circuit, a third voltage reduction circuit and a heating circuit. According to the light source driving circuit for atomic spectrum analysis and the driving method thereof, the deuterium lamp and the cathode lamp share one set of light path and acquisition circuit, so that the structure and the circuit are greatly simplified; meanwhile, control is easy, a light cutting wheel is not needed to obtain modulated pulse signals, the service life is prolonged, and use and maintenance are better facilitated.

The utility model discloses a ballast cabinet for a photocatalytic reactor, which comprises a cabinet body, the surface of the cabinet body is provided with a ventilation assembly for improving the heat dissipation effect of the ballast cabinet, and the inner wall of the cabinet body is provided with a convenient assembly for improving the disassembly and maintenance efficiency. A support assembly used for providing stability for the ballast is installed on the inner wall of the convenient assembly. According to the utility model, through the synergistic effect of all structures of the convenient assembly and the support assembly, when the ballast needs to be maintained or replaced, the ballast can be quickly disassembled easily through simple operations such as opening the anti-falling cover and unfastening the hook; therefore, the maintenance time is greatly shortened, and the production efficiency is improved; through the synergistic effect of all structures of the support assembly, stable and reliable support is provided for ballasts, meanwhile, adjustment can be conducted according to ballasts of different models and sizes, and therefore the universality of the ballast cabinet is improved.