601 results about "Intensity control" patented technology

An LED driver for controlling the intensity of an LED light source includes a power converter circuit for generating a DC bus voltage, an LED drive circuit for receiving the bus voltage and controlling a load current through, and thus the intensity of, the LED light source, and a controller operatively coupled to the power converter circuit and the LED drive circuit. The LED drive circuit comprises a controllable-impedance circuit adapted to be coupled in series with the LED light source. The controller adjusts the magnitude of the bus voltage to a target bus voltage and generates a drive signal for controlling the controllable-impedance circuit. To adjust the intensity of the LED light source, the controller controls both the magnitude of the load current and the magnitude of the regulator voltage. The controller controls the magnitude of the regulator voltage by simultaneously maintaining the magnitude of the drive signal constant and adjusting the target bus voltage.

A light emitting display device 1 characterized by forming one display screen by combining a plurality of light emitting display units comprising intensity control means for measuring a light emission intensity by a light emitting element (organic EL element 20) which is formed above/on a transparent substrate 11 and which includes an anode electrode 12, a cathode electrode 16, at least one organic light emission functional layer (13,14,15) between the electrodes to control the light emission intensity of the light emitting element above/on the substrate 11 within a predetermined range and deterioration state reporting means for detecting a deterioration state of the light emitting element above/on the substrate 11 to report the state.

A system and method for implementing an LED-based luminaire (100) incorporates one or more color channels (32-n). The luminaire includes a controller (50) that uses optical sensing and feedback to control LEDs (30A) in each channel to deliver a consistent intensity and/or color output. The optical feedback loop may provide measured intensity and/or color of the luminaire's output to the luminaire controller. The controller may then adjust the current, pulse width modulation (PWM) duty cycle, or both, which are delivered to discrete color channels of the luminaire to obtain the desired intensity and/or color.

An antenna electrode having a substantially circular shape, is arranged on a plane of a processing vessel, which is located opposite to a stage for mounting a sample within the processing vessel, and positioned parallel to the stage. An emission monitor monitors emission intensity of plasma present in at least 3 different points along a radial direction of the antenna electrode. A control unit adjusts an energizing current supplied to an external coil for forming a magnetic field within the processing vessel. The control unit adjusts the energizing current supplied to the external coil based upon the monitoring result obtained from the emission monitor so as to control the emission intensity of the plasma to become uniform emission intensity.

The present invention provides a method of programming a preset intensity of a dimmer switch from a radio-frequency (RF) remote control. A user is able to adjust the intensity of the lighting load to a new intensity and subsequently press and hold a preset button on the remote control to program the new intensity as the preset intensity. The remote control transmits a wireless transmission to the dimmer switch, which immediately responds to the actuation of the preset button by controlling the intensity of the lighting load to an initial preset intensity. The dimmer switch then blinks a light-emitting diode representative of the new intensity to provide feedback that the dimmer switch is in the process of programming the preset intensity to the new intensity. Eventually, the dimmer switch stores the new intensity as the preset intensity and stops blinking the light-emitting diode.

A light emitting diode (LED) based illumination system with particular application to large scale side lighted liquid crystal displays (LCD). The invention uses on board closed loop intensity control in conjunction with red, green and blue (R,G,B) LED die and a hybrid non-imaging optical system to overcome substantial temperature dependence, loss in intensity with time, increased system cost and complexity, and decreased dynamic range. The invention obtains a large color gamut in excess of 110% of the NTSC (National Television System Committee) recommendation. A high performance thermal management design, the use of “chip on board” technology, compact and efficient collection optics, and on board closed loop intensity control increase and maintain luminous performance and decrease cost relative to less efficient RGB LED approaches. One or more line sources can be generated for applications other than in lighting LCD displays.

A user adjustable visual display system and method for a digital thermostat having a backlit user display screen and system operation indicators is provided. The system allows a user to programmatically vary the illumination intensity of the backlit user display screen and the operational indicators. The variance provided includes disabling of the backlight and operational indicators. The system utilizes a variable pulse width modulated (PWM) intensity control for the backlight and indicators. Alternatively, an adjustable current drive illumination control is used to control the backlight and indicators. The selection of the desired intensity is provided via a display settings menu accessed via the user display screen.

The invention discloses an LED street lamp control system based on an electric power carrier communication technology, which is in a three-layer network structure comprising a single lamp controller, a centralized controller and a management center, wherein the single lamp controller takes a singlechip as a core to be in charge of controlling a street lamp and collecting street lamp working parameters; the centralized controller adopts embedded system design, operates a power line carrier technology and carries out group or single control on street lamps in areas according to preset illumination strategy and assistant illumination intensity control strategy; the management center is mainly composed of a personal computer PC and street lamp system management software to display lamp street state (luminance, voltage, current and power) information; and a GPRS wireless transmission technology or Internet network is used for realizing the remote management of the street lamp switch and luminance regulation. Thus, by using the system, operations such as scheduling events, data record reading, event monitoring, warning response and the like can be realized, and historical data can be inquired.

Improved lighting fixtures are described each of which having its own dimming or intensity control capability that allows for providing the desired lighting output or luminous flux, at each of the fixtures. This capability can be embodied in a dimming device at each fixture that can be manually or wirelessly operated. The present invention is particularly applicable to low voltage landscape or architectural lighting systems, and allows for customizing of the system to meet the particular application. The present invention also allows for tuning of the output for each fixture to compensate for variations in emission.

Apparatus and methods for deodorizing and/or freshening the air are disclosed. In one non-limiting embodiment, the apparatus includes one or more passive members and an air moving member. The passive member can be detachable from the air moving member and used separately as a passive filter member, if it contains a deodorizing substance, or as a passive emitting member, if it contains a substance to be emitted into the air. Numerous combinations of passive filter members and passive emitting members can be used with the air moving member, or as stand-alone members in the described methods. In other non-limiting embodiments, devices can be provided that both deodorize and emit substances into the air. Kits are also provided. The substances to be emitted may be arranged in various ways to improve the amount of exposed surface area of the substance to be emitted. Intensity controlling mechanisms are also provided.

The invention comprises a multi-axis charged particle irradiation method and apparatus. The multi-axis controls includes separate or independent control of one or more of horizontal position, vertical position, energy control, and intensity control of the charged particle irradiation beam. Optionally, the charged particle beam is additionally controlled in terms of timing. Timing is coordinated with patient respiration and/or patient rotational positioning. Combined, the system allows multi-axis and multi-field charged particle irradiation of tumors yielding precise and accurate irradiation dosages to a tumor with distribution of harmful proximal distal energy about the tumor.

The invention discloses a system for delivering acoustic energy to a subject in connection with high intensity focused ultrasound (HIFU) systems. In an embodiment, the system comprises an optionally disposable waveguide-attached ablation applicator coupled with an optionally re-usable waveguide, and an optional acoustic power source. The systems may comprise acoustic energy exit port intensity control, waveguide heat-sinking, and transducer operational adjustments that accommodate waveguide effects on the traversing acoustic power.

A two-terminal light-emitting diode (“LED”) device has a first terminal and a second terminal, and a first color LED and a second color LED. An intensity control device is coupled to the first color LED and a control circuit controls the intensity control device so as to produce a selected light intensity from the first color LED according to a control signal provided to the first terminal. The control signal also provides electrical power to the first color LED and to the second color LED.

A method for treating an oropharyngeal disorder in a patient by neuromuscular electrical stimulation includes selectively placing a plurality of electrodes in electrical contact with tissue of a pharyngeal region of the patient. The method also includes the steps of providing a pulse generator for generating a series of electrical pulses, each of which comprises a biphasic symmetrical waveform with an interval between the two phases, and attaching the plurality of electrodes to the pulse generator so that the series of electrical pulses may be provided to the patient through the plurality of electrodes. According to the method, a series of electrical pulses, each of which comprises a biphasic symmetrical waveform with an interval between the two phases, is generated, and said series of electrical pulses is provided to the patient through the plurality of electrodes. An apparatus for generating a series of electrical pulses for application of electrical neuromuscular stimulation to a patient through a plurality of electrodes for treatment of oropharyngeal disorders includes a pulse generator which generates a series of electrical pulses, each of which pulses comprises a biphasic symmetrical waveform with an interval between the two phases. The apparatus includes an intensity control circuit for regulating the series of electrical pulses such that the intensity of the electrical pulses does not exceed a predetermined value, a frequency controller for controlling the frequency at which the series of electrical pulses is generated so that such pulses are generated at a predetermined frequency, and a duration control circuit for controlling the duration of each such electrical pulse.

It is presented a method for controlling a light level of light emitting diodes, LEDs, comprised in a light sensor segment comprising a light sensor and a plurality of LEDs, the method comprising the steps of: turning on all LEDs in an LED segment, comprising at least one of the plurality of LEDs, detecting a light level associated with the LED segment, by detecting a light level using the light sensor, repeating the steps of turning on all LEDs in an LED segment and detecting a light level, until all of the plurality of LEDs are turned on, and for each LED of the plurality of LEDs, controlling a light intensity of the each LED of the plurality of LEDs, the intensity control depending on the detected light level associated with an LED segment containing the each LED of the plurality of LEDs. A corresponding light sensor array, backlight for a display system and liquid crystal display are also presented.

A lighting system comprising a plurality of light units, wherein said light units are arranged in an array, wherein the light beams of substantially each pair of adjacent light units overlap each other, and wherein the light system comprises a light control means which is arranged to adjust the intensity of each one of said plurality of light units individually, wherein said light control means is further arranged to maintain the total combined luminous flux incident of said plurality of light units on a predefined imaginary flat surface substantially equal when adapting the intensity of the individual light units.

A spectroradiometer is calibrated by a calibration source including a plurality of monochromatic sources for emitting monochromatic rays having different wavelengths from each other, respectively; a reference light emitter for emitting monochromatic reference light by receiving the monochromatic rays emitted from the monochromatic sources; a reference sensor for measuring a reference intensity of the monochromatic reference light emitted from the reference light emitter; and a controller for controlling the emission of the monochromatic rays by the monochromatic sources, and the measurement of the reference intensity of the monochromatic reference light by the reference sensor.