340results about How to "Uniform current" patented technology

A bladeless fan assembly includes a nozzle mounted on a base housing a motor and an impeller driven by the motor for creating an air flow. The nozzle includes an interior passage for receiving the air flow, a mouth for emitting the air flow, and a plurality of stationary guide vanes located within the interior passage and each for directing a portion of the air flow towards the mouth. The nozzle defines an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth.

A fan assembly for creating an air current includes an air outlet mounted on a stand. The stand includes a base and a body tiltable relative to the base. The fan assembly has a centre of gravity located so that when the base is located on a substantially horizontal support surface, the projection of the centre of gravity on the support surface is within the footprint of the base when the body is in a fully tilted position.

An LED with improved current spreading structures that provide enhanced current injection into the LED's active layer, improving its power and luminous flux. The current spreading structures can be used in LEDs larger than conventional LEDs while maintaining the enhanced current injection. The invention is particularly applicable to LEDs having insulating substrates but can also reduce the series resistance of LEDs having conductive substrates. The improved structures comprise conductive fingers that form cooperating conductive paths that ensure that current spreads from the p-type and n-type contacts into the fingers and uniformly spreads though the oppositely doped layers. The current then spreads to the active layer to uniformly inject electrons and holes throughout the active layer, which recombine to emit light.

In an electrochemical reactor used for electrochemical treatment of a substrate, for example, for electroplating or electropolishing the substrate, one or more of the surface area of a field-shaping shield, the shield's distance between the anode and cathode, and the shield's angular orientation is varied during electrochemical treatment to screen the applied field and to compensate for potential drop along the radius of a wafer. The shield establishes an inverse potential drop in the electrolytic fluid to overcome the resistance of a thin film of conductive metal on the wafer.

A surface light emitting semiconductor laser element, comprises a substrate, a lower reflector including a semiconductor multi-layer disposed on the substrate, an active layer disposed on the lower reflector, an upper reflector including a semiconductor multi-layer disposed on the active layer, a compound semiconductor layer having a first opening for exposing the upper reflector and extending over the upper reflector, and a metal film having a second opening for exposing the upper reflector disposed inside of the first opening and extending over the compound semiconductor layer, wherein the metal film and the compound semiconductor layer constitute a complex refractive index distribution structure where a complex refractive index is changed from the center of the second opening towards the outside. A method of emitting laser light in a single-peak transverse mode is also provided.

A bidirectional converter circuit includes a voltage source which provides an input voltage, an energy storage set connected to the voltage source and receives the input voltage, a switch set connected to the energy storage set, wherein the switch set includes a first switch and a second switch; an operating switch set connected to the switch set, wherein the operating switch set includes a first operating switch, a second operating switch, a third operating switch and a fourth operating switch. The bidirectional converter further includes a blocking capacitor set and a (input/output) capacitor set. Wherein, the blocking capacitor set is connected to the switch set and the operating switch set. The first operating switch and the second operating switch are driven complementarily with the first switch, and the third operating switch and the fourth operating switch are driven complementarily with the second switch.

The invention relates to an energy transfer type power battery quick balancing system and a control method thereof. The invention relates to the battery voltage balancing system and further relates to the control method of battery pack quick balancing process, which solves the problem that a balanced battery single body and an energy storing element are impacted through pulse current by a currentbalancer in the prior art. The system comprises a power battery pack single body battery voltage and flying capacitor voltage detecting network, a current sensor and a signal modulating circuit, a single chip microcomputer, an electric power transfer channel, a first filter circuit, a two-way buck-boost converter, a second filter circuit and a flying capacitor. After starting to work, the system firstly detects the battery pack single body battery voltage, the flying capacitor voltage and the charging/discharging current; and if the dropout voltage between the highest voltage of the battery single body and the lowest voltage of the single body exceeds a set value, the balancing operation is started.

To control variation in a driving current depending on Vth in a current program mode pixel circuit. In a state in which a variable current source 4a and a transistor T3 are electrically isolated from each other, a gate voltage of the diode-connected transistor T3 is set to an offset voltage (Vdd−Vth) according to a threshold voltage Vth thereof. Next, in a state in which the variable current source 4a and the transistor T3 are electrically connected to each other, data based on the offset voltage and according to a product of a data current Idata and a supply time thereof are written in a capacitor C1 connected to a gate of the transistor T3. And then, a driving current according to data stored in the capacitor C1 is generated by means of the transistor T3, whereby brightness of an organic EL element OLED is set.

The invention discloses a multi-resonance circuit suitable for an LED multi-path precise constant current driver. The multi-resonance circuit comprises a high-frequency pulse AC source, an impedance network, a resonance capacitor, a high-frequency transformer, two-path rectifying filter circuits and two-path LED loads, wherein the high-frequency resonance capacitor and the impedance network form a high-frequency resonance network which participates in the resonant transformation of a main circuit and has a blocking function, namely, balancing the voltage differences of the two-path LED loads to equalize the average current flowing through the two-path LED loads; and under an ideal condition, when the voltage drop of the two-path LED loads are completely equal, the voltages at the two endsof the resonance capacitor are zero. The multi-resonance circuit has the advantages of: 1, achievement of equalizing current among the multi-path LED loads through a primary converting circuit, low cost, no need of additional control circuits, and high reliability; 2, high precision of equalizing current, and insusceptibility to the voltage differences of the two-path LED loads; 3, high efficiency of the achievement of the equalizing current through a blocking capacitor, and little loss in the achievement of the equalizing current even if the voltage differences of the two-path LED loads are large.

The invention discloses a method for controlling unbalanced three-phase loads of a low-voltage distribution network. The method uses a station area controller to collect three-phase current data on the low-voltage side of a distribution transformer, load data of an outlet leakage protection switch, and user power consumption data. The load data and the current and phase data of the commutation switch are analyzed and calculated to obtain the unbalance value of each outgoing line. When the unbalance is found to be greater than the set limit value, and the unbalance maintenance time exceeds the set adjustment time In this case, the optimal "unbalance adjustment method" is given, and the phase change switch is automatically controlled by remote control to adjust the load and complete the redistribution of the three-phase loads of each outgoing line, so that the three-phase loads of each outgoing line are in a basically balanced state, so as to achieve low-voltage line The three-phase load balance state. The invention realizes the redistribution of the single-phase load current by controlling the phase change switch installed on the side of the household meter box, so as to achieve the basic balance of each phase load.

A medical electrode includes a moderately conductive flexible member having a top side and a bottom side with a plurality of highly conductive patterns disposed on the conductive flexible member bottom side in a spaced apart relationship. A moderately highly conductive layer disposed on the conductive flexible member bottom side and covering the conductive patterns, for adhering the electrode to a patient's skin. A connector is provided for establishing electrical contact with an external apparatus. The connector includes a leadwire having conductive portions in electrical communication with the patterns and non-conductive portions between the patterns.

The present invention relates to light-emitting diodes. A light-emitting diode according to an exemplary embodiment of the present invention includes a first group including a plurality of first light emitting cells connected in parallel to each other, and a second group including a plurality of second light emitting cells connected in parallel to each other. Each first light emitting cell and second light emitting cell has a semiconductor stack that includes a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and an active layer disposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer. At least two light emitting cells of the first light emitting cells share the first conductivity-type semiconductor layer, and at least two light emitting cells of the second light emitting cells share the first conductivity-type semiconductor layer. The first light emitting cells are connected in series to the second light emitting cells.

A method comprising introducing an injected gas (e.g., Argon, Xenon) into a beam line region comprising a magnetic scanner is provided herein. The injected gas improves beam current by enhancing (e.g., increasing, decreasing) charge neutralization of the magnetic ion beam (e.g., the ion beam at regions where the scanning magnetic field is non-zero) thereby reducing the current loss due to the zero field effect (ZFE). By reducing the current loss in regions having a magnetic field, the magnetic beam current is increased (e.g., the beam current is increased in regions where the magnetic field is non-zero) raising the overall beam current in a uniform manner over an entire scan path and thereby reducing the effect of the ZFE. In other words, the ZFE is removed by effectively minimizing it through an increase in the magnetized beam current.

The instant disclosure relates to a LED backlight driving module. The driving module utilizes a plurality of second power isolation transformers interconnected to each other in series and connected to a secondary winding of a first power isolation transformer in parallel to produce a plurality of second driving signals with uniform current, and driving corresponding LED light bars with uniform brightness. Optionally, a base voltage circuit can be used to provide a base voltage with negative voltage level on the other end of LED light bars, so as to lower the positive voltage level of the second driving signals. Thus, it is beneficial that the LED backlight driving module provides higher power conversion efficiency and has lower design cost.

The light emitting element includes a first electrode and a second electrode opposite each other and electrically connected respectively to a first conductive-type layer and a second conductive type layer constituting a semiconductor structure. The first electrode has a pair of electrode extending portions disposed opposite each other on an electrode forming surface over the first conductive-type layer which is positioned at the light extracting side. In the opposing direction of the pair of electrode extending portions, a half distance I1 between the electrode extending portions is smaller than the distance L2 from the electrode extending portions to an end edge of the electrode forming surface.

The invention discloses a resonant converter device and a use method thereof. The resonant converter device comprises a plurality of resonant converters and a control module, wherein the plurality of resonant converters are connected in parallel; the control module outputs a pulse-width modulation control signal and comprises a voltage control loop and a current control loop; the voltage control loop compares sensed output voltage with a preset reference voltage, and outputs the pulse-width modulation control signal to one of the plurality of converters so as to enable the output voltage of the converter to be equal to the preset reference voltage; and the current control loop takes the sensed output current of the converter as a reference current, compares the reference current with sensed output currents of other converters in the plurality of converters except one converter, generates frequency adjusting variable and calculates respective pulse-width modulation control signals for each of the other converters so as to enable the output currents of all the converters to be equal. Therefore, the invention provides a current balance mechanism for the converter device.

A method of driving a liquid crystal display wherein an application sequence of a data is changed, to thereby improve a picture quality. In the method, the data is supplied to a desired number of data lines on a basis of first sequence in a first horizontal period. The data is supplied to the desired number of data lines on a basis of second sequence in a second horizontal period following the first horizontal period.

A backlight driving apparatus is disclosed which is capable of simplifying a circuit configuration for driving of a plurality of light emitting diode arrays and making the current balance of the light emitting diode arrays uniform. The backlight driving apparatus includes n light emitting diode arrays that include a plurality of light emitting diodes connected in series, a power source for generating a driving current, a current generator for generating currents to drive the light emitting diode arrays using the driving current, respectively, and a current mirror circuit for allowing substantially the same amount of currents to flow respectively through the light emitting diode arrays based on current from any one of the n light emitting diode arrays.

The invention provides an AMOLED drive system and a drive method. The AMOLED drive system is additionally provided with a test pixel (5) and a compensation unit (4), brightness of the test pixel (5) is obtained through a brightness sensor (42) in the compensation unit (4), a compensation voltage signal (Svn) is calculated and generated through a compensation IC (41) according to the brightness of the test pixel (5), and a source pole drive unit (2) sends the compensation voltage signal (Svn) and a data signal (Data) to a display unit (1). The circuit structure can be simplified, a threshold voltage driving a thin-film transistor is effective compensated, a current flowing through an organic light-emitting diode is stable, light-emitting brightness of an AMOLED is guaranteed to be uniform, and a display effect of a frame is improved.

The invention provides an automatic balance device of a distribution network with three-phase load balance, which relates to a device able to automatically regulate the distribution network with three-phase load balance, aiming to solving problems that in the prior art, an adjustment method of the distribution network three-phases load balance is only able to cause the distribution network nearly to the three-phase balance with the disadvantages of waste of time and vigor, requirement of a shutdown and delay manufacture. In the invention, a voltage detection module, an electric current detection module, a voltage across-zero-aberration detection module and a solider relay and power-supply module are connected with the three-phase distribution network; the voltage detection module and the electric current detection module are connected with an electric energy computation module; the electric energy computation module is connected with an interface electric level switching module; the interface electric level switching module is connected with a master controller; the voltage across-zero-aberration detection module is connected with a slave controller; the control input terminal of the slave controller is connected with a control output terminal of the master controller; the solider relay is connected with a first rectifier; the solider relay is connected with the slave controller; the first rectifier is connected with a first inverter; the first inverter is connected with a parallel-in module, and the parallel-in module is connected with the three-phase distribution network.

A display portion in which pixels are arranged in a matrix is formed on a display panel and a drive current line, which supplies a drive current from a terminal formed at a side along a column direction to a display element in each pixel, includes a branch line provided for each column of the display portion and along each column of the display portion; a trunk line to which the branch line is connected and which extends along a row direction at a peripheral portion at a lower side of the display portion; and a connection line which connects the trunk line and the terminal. The connection line is separated from a region of the trunk line near the terminal by a slit provided from a side of the trunk line near the terminal to a side of the trunk line distanced from the terminal and extends in parallel to the region of the trunk line near the terminal at the peripheral portion at the lower side of the display portion from a region in which the terminal is formed. The connection line is connected to the trunk line at an intermediate position of the peripheral portion at the lower side of the display portion along the row direction. A length of the slit and a width of the region of the trunk line near the terminal are optimized to inhibit brightness variation within the display portion.

The present invention relates to a light emit-ting die component formed by multilayer structures. The light emitting die component comprises a semiconductor structure (103) comprising: an n-type layer (104), an active region (106) and a p-type layer (108); a p-contact layer (110) arranged to be in electrical contact with said p-type layer (108); an n-contact layer (116) arranged to be in electrical contact with said n-type layer (104); a first dielectric layer (114) arranged to electrically isolate said p-contact layer (110) from said n-contact layer (116); a thermal spreading layer (120) comprising a first and a second region (120a, 120b) being electrically isolated from each other, wherein said first region (120a) forming an anode electrode of said light emitting die component and said second region (120b) forming a cathode electrode of said light emitting die component; a second dielectric layer (118) arranged to electrically isolate said n-contact layer (116) from said first region (120a) or to electrically isolate said p-contact layer (110) from said second region (120b); a third dielectric layer (122) arranged to electrically isolate said first and second regions (120a, 120b); and an interconnect pad (124) enabling interconnection with a submount (126).