2270 results about "Current distribution" patented technology

A vertical-cavity surface-emitting laser (VCSEL) comprising a low-loss thin metal contact and current spreading layer within the optical cavity that provides for improved ohmic contact and lateral current distribution, a substrate including a plano-concave optical cavity, a (Ga,In,Al)N multiple quantum well (MQW) active region contained within the optical cavity that generates light when injected by an electrical current, and an integrated micromirror fabricated onto the substrate that provides for optical mode control of the light generated by the active region. A relatively simple process is used to fabricate the VCSEL.

Microchip devices and methods of manufacture thereof are provided to increase the uniformity and reliability of active exposure and release of microchip reservoir contents. In one embodiment, the microchip device for the controlled release or exposure of molecules or secondary devices comprises: (1) a substrate having a plurality of reservoirs; (2) reservoir contents comprising molecules, a secondary device, or both, located in the reservoirs; (3) reservoir caps positioned on the reservoirs over the reservoir contents; (4) electrical activation means for disintegrating the reservoir cap to initiate exposure or release of the reservoir contents in selected reservoirs; and (5) a current distribution means, a stress induction means, or both, operably engaged with or integrated into the reservoir cap, to enhance reservoir cap disintegration.

The present invention relates to a video coding method. Specifically, the invention relates to motion vector (MV) coding, wherein the MV coding is based on edge matching or adaptive template matching, namely the motion vector coding based on boundary matching (MVCBM) and the motion vector coding based on adaptive template matching (MVCATM). Generally speaking, the invention limits a prediction candidate set, wherein a predictor adaptively changes based on the current distribution of the adjacent MV. Subsequently, a matching technique (boundary matching in MVCBM and adaptive template matching in MVCATM) is used for reducing the number of the prediction and reducing the number of bits used by indexing. Afterwards, an optimal motion vector predicator is selected from the reduced concentrated predictor. The guessing strategy based on the least MVD standard further saves the number of indexing bits.

A method and apparatus for driving an electron source in which a high-quality image display is presented by correcting a non-uniform effective current distribution caused in cold cathode elements by leakage current. A digital video signal enters a shift register where a serial-to-parallel conversion is made for each line of an image based upon a shift clock signal. One line of the image data that has been subjected to the serial-to-parallel conversion is latched in a latch circuit and then applied to a voltage modulating circuit. The latter voltage-modulates the input data and sends the modulated signal to a voltage/current converting circuit. The latter converts the voltage quantity to a current quantity, which is applied to each of the cold cathode elements of a display panel through respective column terminals. A voltage V1 is applied to the selected row wire, and a voltage V2 (V2<> V1) is applied to all other row wires, for controlling the leakage current.

A light emitting diode (LED), a fabricating method thereof, and a package structure thereof are provided. The LED includes a substrate, a first semiconductor layer disposed on the substrate, an active layer disposed on the first semiconductor layer, a second semiconductor layer disposed on the active layer, a current distribution modifying pattern, a first electrode and a second electrode. The active layer and the second semiconductor layer form a mesa structure and expose a part of the first semiconductor layer. The current distribution modifying pattern is disposed on the second semiconductor layer. The first electrode is disposed on and electrically connected to the first semiconductor layer exposed by the mesa structure. The second electrode is disposed on the current distribution modifying pattern and is electrically connected to the second semiconductor layer. The LED has superior light emitting efficiency.

A charging circuit may include a battery unit in which a rechargeable battery is mounted; a charging unit configured to provide a charging current to the rechargeable battery in the battery unit, based on a direct current (DC) voltage converted from an alternating current (AC) voltage, and configured to charge the rechargeable battery; and/or a controller configured to control the charging unit such that the charging unit provides the rechargeable battery with a first charging current following a first current profile in a first charging mode as the charging current at least in a first period of the first charging mode, based on the charging current, a battery voltage of the rechargeable battery, and a temperature of the rechargeable battery, wherein the first current profile is smaller than an available maximum current in the first period.

An electrode for use in an iontophoretic drug delivery having a substantially uniform distribution of current about the electrode. One such electrode includes a substrate, at least one first conductive layer of material disposed upon the substrate and at least one dielectric layer of material disposed upon at least a portion of the at least one conductive layer of material. The dielectric layer cooperates with the conductive layer of material to promote the substantially uniform distribution of current. Another such electrode includes a substrate, a conductive layer of material and a sacrificial layer of material.

The invention relates to an object file organization method based on an object storage device, comprising the following steps of: establishing the layout of an object file system in a disk, loading information including object description, object bitmap and the like in a memory; detecting the size of the object file by a space allocator before allocating the space; if the size of the object file is acquired, adopting a pre-allocating method to allocate space for the object file on the disk; if the size of the object file can not be acquired, firstly writing part data of the object file into a buffer zone; detecting whether the buffer zone is fully filled or whether the client needs to release the caching data, allocating space for the data in the buffer zone on the disk, and writing the data into the disk; and when the data in the buffer zone is far larger than size of the logic data sub-block, allocating storage space for the data by the space allocator. The invention adopts the method of continuously allocating a plurality of data blocks, thus reducing the time for searching and allocating free blocks, and making up the limitation and disadvantage of object file system disk space allocation in the current distribution-type file system.

The invention discloses a circuit for controlling light sources, method and display system. The circuit for controlling light sources comprises a converter, a feedback circuit and a current distribution controller. The converter is operable for converting an input voltage to an output current and for providing the output current to the light sources. The feedback circuit is coupled to the light sources for generating feedback signals indicative of currents flowing through the light sources respectively. The current distribution controller is coupled to the feedback circuit for generating control signals based on the feedback signals respectively so as to regulate the currents of the light sources respectively, and for controlling the converter to regulate the output current based on the feedback signals. The circuit for controlling light sources without a plurality of linear regulators or switch controllers and switch regulators reduces the circuit cost, increases the circuit efficiency and reduces the circuit complexity.

A printed quasi-tapered tape helical element and printed helical array antenna arc disclosed. The helical element comprises a thin helix conductor having a uniform section associated with a tapered section. The helix conductor can be printed on a thin dielectric sheet and bonded to a hollow composite dielectric support. A solid copper conductor is configured to provide electrical connection between a feeding point of the helix conductor and a microstrip line of a microstrip feed network. The uniform and tapered helix turns are respectively wrapped around the uniform and tapered sections, which enables impedance matching, axial mode excitation, gain and radiation patterns, and damping out of standing waves generated in current distribution over the helix conductor. Conductive composite cups surrounding each helical element reduces mutual coupling in array environment. Thus, the helical element and the array antenna achieve low on-axis and off-axis axial ratio performance over the wideband for global coverage.

The invention relates to a dynamic adjustment-based express delivery distribution optimization method. The method includes the following steps that: express delivery dynamic information is obtained in real time, wherein the express delivery dynamic information contains the locating information of express delivery vehicles, goods delivery point information, goods taking point information and real-time traffic information; with minimum total distribution costs adopted as an objective function, a mixed integer programming model is adopted to construct a current distribution path according to the express delivery dynamic information, wherein the minimum total distribution costs contain the transportation costs of the vehicles, the fixed costs of the enabling of the vehicles, additional costs caused by the exceeding of maximum travel and penalty costs caused by the violation of time window constraints; and a simulated annealing hybrid genetic algorithm is adopted to optimize the current distribution path. According to the dynamic adjustment-based express delivery distribution optimization method of the invention, the current distribution path is optimized and dynamically adjusted according to the express delivery dynamic information, and therefore, the speed of express delivery distribution is improved, customer demands can be quickly responded, the distribution costs of an enterprise can be decreased, the utilization rate of the vehicles can be improved, urban traffic congestion can be reduced, and the operation efficiency of express delivery business can be benefitted.

An LED comprises a multilayered light-generating semiconductor region grown on one of a pair of opposite major surfaces of a semiconducting silicon substrate, a bonding pad overlying the light-generating semiconductor region and received in part in a cavity formed centrally therein, and a substrate electrode on the other major surface of the substrate. For protecting the LED from voltage spikes or like transients, an overvoltage protector such as a Schottky barrier diode is interposed between the bonding pad and the substrate. Further, for a uniform current distribution throughout the light-generating semiconductor region, a current-spreading film of electrically conducting, optically transparent material overlies the light-generating semiconductor region and itself covered by a transparent overlay of electrically insulating material. The bonding pad is electrically coupled to the current-spreading film via a plurality of connector strips extending radially from the pad over the transparent overlay. The connector strips have ribs depending therefrom and extending through radial slits in the transparent overlay into electrical contact with the current-spreading film.

A voltage distribution device for use especially in motor vehicles, includes a first area (2) made of conductive material and fitted with at least one electrical connection (8), at least two separate second areas (3, 4) made of conductive material and fitted with at least one electrical connection each (7), and bridge-like fuse areas (5, 6) made of conductive material, which each link the second areas (3, 4) with the first (2) and are inseparably connected to the first and associated second area. The bridge-like fuse areas (5, 6) each have a cross-section of material calibrated along a longitudinal section according to material thickness and/or depth. In another embodiment of the invention, in a voltage distribution device for use especially in motor vehicles, a first area (2) made of conductive material and with at least one electrical connection (8), and at least two second areas (3B) made of conductive material and with at least one electrical connection each (4), are linked by bridge-like fuse areas made of conductive material (3), whereby these fuses (3) are inseparably connected to the first area (2) by deep-draw sleeves (5).

A dynamic profile anode whose shape can be varied to optimize the current distribution to a substrate during highly controlled electrodeposition. Enhanced control of the process provides for a more uniform deposit thickness over the entire substrate, and permits reliable plating of submicron features. The anode is particularly useful for electroplating submicron structures. The anode is advantageously able to use metallic ion sources and may be placed close to the cathode thus minimizing contamination of the substrate. The anode profile may be varied during the deposition process. The anode may consist of multiple concentric regions, each of which may be operated at independent voltages and currents.

The invention discloses an additive used for hard anodic oxidation of high-silicon aluminum alloy, with 10g-55g of polybasic organic acid and 0-200g of polylol in each litre of aqueous solution. The additive can lead the dissolution rate of the anode oxide film to be reduced, obviously improve the surface current distribution situation of high-silicon aluminum alloy products, and avoid ablation caused by the over intensive surface current distribution of the products, is beneficial to forming even and complete anode oxide film on the surface and improving the film forming speed and film hardness, avoids the occurrence of the ablation phenomenon, and can further improve the upper limit value of the oxidizing temperature and avoid low-temperature operations, thus simplifying the operation, saving the energy, reducing the cost and leading the film quality to be obviously improved.

The invention discloses a double-gun charging system. The double-gun charging system comprises a first charger, a first charging gun, a second charger, a second charging gun and an electrical car, wherein the first charger is connected with the first charging gun, the second charger is connected with the second charging gun, the system can be in a single-gun charging state or a double-gun charging state, during single-gun charging, the single charger communicates with the electrical car and outputs a charging current and a charging voltage to charge the electrical car; during double-gun charging, sequence of the charging guns inserted into car charging seats is detected, the charger corresponding to the firstly-inserted charging gun is taken as the main charger, the secondly-inserted charger is taken as a secondary charger, the main charger communicates with the electrical car, the main charger distributes charging sub currents and charging voltages, and the main and secondary chargers output the charging voltages and the charging sub currents according to current distribution instructions. The invention further discloses a double-gun charging method. The double-gun charging system is advantaged in that a technical problem of low charging efficiency of a single charger is solved, and the charging time is shortened.

An apparatus and method for highly controlled electrodeposition, particularly useful for electroplating submicron structures. Enhanced control of the process provides for a more uniform deposit thickness over the entire substrate, and permits reliable plating of submicron features. The apparatus includes a pressurized electrochemical cell to improve plating efficiency and reduce defects, vertical laminar flow of the electrolyte solution to remove surface gases from the vertically arranged substrate, a rotating wafer chuck to eliminate edge plating effects, and a variable aperture to control the current distribution and ensure deposit uniformity across the entire substrate. Also a dynamic profile anode whose shape can be varied to optimize the current distribution to the substrate. The anode is advantageously able to use metallic ion sources and may be placed close to the cathode thus minimizing contamination of the substrate.