37results about How to "Reduce duty cycle" patented technology

A system for powering and controlling an LED backlight, the system comprising: a control circuitry; a plurality of LED strings; a pulse width modulation functionality associated with the control circuitry and arranged to pulse width modulate a current flow through each of the plurality of LED strings; and a plurality of current limiters responsive to the control circuitry, each of the plurality of current limiters being associated with a particular one of the plurality of LED strings and operative to limit current flow of the pulse width modulated current there-through, the control circuitry being operative in the event of a thermal condition of one of the plurality of current limiters to reduce a duty cycle of the pulse width modulation functionality of the current flow through the one of the plurality of current limiters.

The present invention is directed generally to a power supply. According to various embodiments, the power supply includes at least one DC / DC converter. The converter includes a primary switch controlled by a pulse width modulated control signal such that the primary switch is on for a D time period of each switching cycle of the converter and is off for a 1-D time period of each switching cycle. Also, the power supply includes a current sensing element connected in series with the primary switch. In addition, the power supply includes a current limit circuit connected to the current sensing element. The current limit circuit includes a functional circuit having a first input responsive to a first signal whose voltage is proportional to the output current of the converter during the D time period of the switching cycle of the converter. A second input of the functional circuit is responsive to a second signal whose voltage is proportional to the output current of the converter during the 1-D time period of the switching cycle of the converter. In that way, the voltage of the output signal of the functional circuit is proportional to the output inductor current of the converter over both the energy storage phase (the D interval) and the energy deliver phase (the 1-D) interval of the converter.

A solar powered ground lights is typically mounted in a walkway, pathway, pool deck, roadway, park pathway, either in cement, wood, synthetic materials, or otherwise, and are ideally suited for use in walkways, walls, ceilings, and pool or dock areas because they are readily mounted from the top, requiring only a cylindrical depression and possibly three screws for mounting and require no external wiring. The solar powered ground lights are LED or electro-illuminescent or similar type, supported close to a lens for a good low angle view factor and are low voltage and safe. A solar panel recharges the battery. The system may be fully IP68 waterproof rated.

In one embodiment, a system includes power management control that controls a duty cycle of a processor to manage power. The duty cycle may be the amount of time that the processor is powered on as a percentage of the total time. By frequently powering up and powering down the processor during a period of time, the power consumption of the processor may be controlled while providing the perception that the processor is continuously available. For example, the processor may be a graphics processing unit (GPU), and the period of time over which the duty cycle is managed may be a frame to be displayed on the display screen viewed by a user of the system.

Systems, apparatuses, and methods are provided for actuating less than all of a plurality of load management devices on a wind turbine and / or a wind turbine blade. In some embodiments, the actuation sequences may be a root-to-tip, tip-to root, maximum-distributed-load, random, and / or a cycle-count actuation sequence. Further, a combination of two or more actuation sequences may be utilized to achieve a desired result. The system may choose an appropriate blade-based and / or rotor-based actuation sequence according to operating conditions, may alternate actuation sequences, and / or may employ different actuation sequences among the plurality of blades of a wind turbine. The load management devices may be actuated to different maximum heights and / or may be configured to be actuated to variable heights. The load management devices may be included as part of a distributed management system providing a corresponding controller and / or sensor at each load management device.

In one embodiment, a system includes power management control that controls a duty cycle of a processor to manage power. The duty cycle may be the amount of time that the processor is powered on as a percentage of the total time. By frequently powering up and powering down the processor during a period of time, the power consumption of the processor may be controlled while providing the perception that the processor is continuously available. For example, the processor may be a graphics processing unit (GPU), and the period of time over which the duty cycle is managed may be a frame to be displayed on the display screen viewed by a user of the system.

The invention discloses a proximate matter traction cutting robot. According to the proximate matter traction cutting robot, the connection and the communication are achieved through double traction devices and a saw cutting device by means of a main control system, and the double traction devices and the saw cutting device all have own independent running orbits, so that the working cycle can begreatly shortened; when one traction device works, the other traction device returns to an original point at the low speed and awaits orders, so that the proximate matter traction cutting robot can beparticularly suitable for the situation that one rod needs to be sawed several times, and can break through the restriction that the highest return speed is always required for the single-orbit double traction process; the mechanical abrasion is greatly reduced; the higher safety is achieved; and the proximate matter traction cutting robot is durable and easy to maintain.

The invention discloses a shifting register unit and an array substrate gird driving device. With the adoption of the shifting register unit and the array substrate gird driving device, low-noise signals can be output by the shifting register unit and the shifting register unit can stably work for a long time period. The shifting register unit provided by the invention comprises an input module, a resetting module, a pull-upward module, a first pull-downward module, a first pull-downward control module, a second pull-downward module and a second pull-downward control module, wherein the input module is used for supplying a first working voltage to a pull-upward node of the pull-upward module; the resetting module is connected with the pull-upward node and is used for reducing the voltage of the pull-upward node to a second working voltage; the pull-upward module is connected with the pull-upward node, is used for storing the first working voltage and supplies a first clock signal to an output terminal; the first pull-downward module is used for supplying a third working voltage to the output terminal; the first pull-downward control module supplies a second clock signal to the pull-downward node, and supplies the third working voltage to the pull-downward node; the second pull-downward module is used for supplying the third working voltage to the pull-upward node and the output terminal; and the second pull-downward control module is used for inputting the second clock signal to the pull-downward node.

The invention discloses a method and a system for evaluating the performance of an aircraft. The evaluation method comprises the steps of establishing an overlapped grid model of a target aircraft; Creating a management node, S nested working nodes and N computing working nodes; Extracting N nested grids and S nested grids from the overlapped grid model through the management node; Respectively performing nesting processing on the S nesting grids through the S nesting working nodes; Respectively carrying out aerodynamic force calculation on the N nested grids through N calculation working nodes, and carrying out initial aerodynamic force calculation result exchange and a nested difference value according to nested exchange index information to obtain a local grid aerodynamic force calculation result; Summarizing the local grid aerodynamic force calculation results through the management nodes, judging whether calculation ending conditions are met or not, and outputting the aircraft aerodynamic force calculation results if the calculation ending conditions are met. According to the invention, the aerodynamic analysis speed of the aircraft is improved, and the performance evaluationspeed of the aircraft is further improved.

The invention provides a grooving machine for bi-directional paperboard grooving. The grooving machine comprises a workbench (100), a paperboard feeding device (200), a vacuum adsorption assembly (300), a movable cutter assembly (400), a fixed cutter (500), an output belt (600) and a rack (700), wherein the paperboard feeding device (200), the movable cutter assembly (400), the fixed cutter (500) and the output belt (600) are sequentially arranged on the workbench (100) and are used for achieving transportation and cutting grooving of paperboards; the paperboard feeding device (200) is positioned at the foremost end of a production line, and is used for placing and feeding the paperboards; the workbench (100) is positioned at the undermost part of the rack (700); the fixed cutter (500) is directly fixed to the rack (700), and is used for cutting the moving paperboards; and the output belt (600) is positioned at the rearmost end of the production line, and is used for outputting the cut paperboards. According to the grooving machine, the production efficiency of paperboard grooving is improved, the paperboards are located and processed at a time, the defective rate is decreased, raw materials are fully utilized, and the production cost is reduced.

The invention discloses a mold-closing method for wind power blades. A vacuum layer is pre-laid on the mold-closing and parting surfaces, and the two vacuum layers can be torn off after the blades are formed and can be directly mold-closed and bonded. The invention can reduce the operating time of employees, reduce the mold occupation cycle of the bonding process, avoid the traditional on-site vacuum repacking, and significantly improve the pass rate of the vacuum inspection.