120 results about "Diode" patented technology

A display apparatus including a light emitting diode part including a plurality of regularly arranged light emitting diodes, and a TFT panel part configured to drive the light emitting diode part. The light emitting diode part includes a transparent electrode, the light emitting diodes regularly disposed on a first surface of the transparent electrode and electrically connected to the transparent electrode, a plurality of first reflective electrodes disposed at sides of the light emitting diodes, surrounding the light emitting diodes, and electrically connected to the transparent electrode, and a plurality of second reflective electrodes electrically connected to the light emitting diodes, respectively, and reflecting light emitted from the light emitting diodes.

A quad photoreceiver includes a low capacitance quad InGaAs p-i-n photodiode structure formed on an InP (100) substrate. The photodiode includes a substrate providing a buffer layer having a metal contact on its bottom portion serving as a common cathode for receiving a bias voltage, and successive layers deposited on its top portion, the first layer being drift layer, the second being an absorption layer, the third being a cap layer divided into four quarter pie shaped sections spaced apart, with metal contacts being deposited on outermost top portions of each section to provide output terminals, the top portions being active regions for detecting light. Four transimpedance amplifiers have input terminals electrically connected to individual output terminals of each p-i-n photodiode.

The present invention relates generally to both a system and method for visually (e.g., via a video-based system or some other visual system) monitoring one or more objects where such objects are obscured by a high intensity light source such as a plasma, flame, or welding arc. In one embodiment, a system in accordance with the present invention comprises a digital camera, at least one light emitting diode (LED) light source, and at least one filter. In another embodiment, a system in accordance with the present invention comprises a digital camera, at least one light emitting diode (LED) light source, and at least one filter selected from a notch filter, a neutral density filter, or combinations thereof. Additionally, the system of the present invention can further include software designed to process, interpret and/or collect various data captured by the visual monitoring, or, imaging, system of the present invention.

The invention relates to an amorphous silicon image sensor with a storage capacitor structure, comprising a plurality of pixel units. Each pixel unit comprises a grid wiring, a first insulating layer, an active layer, a data wiring, a second insulating layer, a storage capacitor, a photosensitive diode, a passivation layer and a bias voltage wire, wherein the storage capacitor is arranged below the photosensitive diode; a lower electrode of the storage capacitor is formed on a glass substrate or the first insulating layer, and an upper electrode of the storage capacitor is formed on a dielectric layer and connected with a source electrode; a first electrode of the photosensitive diode is in co-electrode with the upper electrode of the storage capacitor; and a second electrode of the photosensitive diode is conductive with the lower electrode of the storage capacitor and the bias voltage wire. By means of the amorphous silicon image sensor disclosed by the invention, the charge storagecapacity of the pixel units is increased under the condition of not enlarging or reducing pixel dimensions by arranging the storage capacitor below the photosensitive diode, and therefore the purposeof enhancing the signal dynamic range of a thin film transistor matrix panel under the precondition of not losing the resolution ratio of the thin film transistor matrix panel is achieved.

A multi-winding high step-up DC-DC converter includes a three-winding transformer to transform a low DC voltage to a high DC voltage; a power switch to control the energy flux of the primary winding of the three-winding transformer based on turning on/off the power switch; a first diode to control the current of the first secondary winding of the three-winding transformer; a second diode to control the current of the second secondary winding of the three-winding transformer; and a third diode to control the current of the primary winding. When the DC-DC converter is in the first operation state, the switch and the second diode are in on state, and the first and the third diodes are in off state. When the DC-DC converter is in the second operation state, the switch and the second diode are in off state, and the first and the third diodes are in on state.

An organic light emitting element including: a first electrode; a bump partially covering an end of the first electrode and having an island shape, which has a thickness larger than a thickness of the first electrode; an organic emission layer on the first electrode and the bump; and a second electrode on the organic emission layer.

A solar powered LED portable light tower. A solar powered LED portable light tower may comprise: one or more photovoltaic modules, an adjustable masthead, one or more lamps, one or more batteries, an inverter, a controller, and a base. The lamps may be light emitting diodes. The controller may be configured to turn on and off and dim said one or more lamps, and preferably comprises a motion sensor. The portable light tower may also comprise a concrete ballast, fork lift option, and/or a trailer option.

The light emitting diode structure includes a substrate, a first electricity semiconductor layer formed on the substrate, a light-emitting layer formed on the first electricity semiconductor layer, a second electricity semiconductor layer formed on the light-emitting layer, a barrier layer formed on the second electricity semiconductor layer, and a contact layer formed on the barrier layer.

The invention discloses a main circuit of a three-phase four-wire DC/AC convertor and a control method thereof. The main circuit comprises two power semiconductor switches G1 and G2, two diodes D1 and D2, a capacitance branch and an inductor L1, wherein the two power semiconductor switches G1 and G2 are connected with a bridge arm with midpoint drifting control in series from top to bottom; the two diodes D1 and D2 are connected with power semiconductor switches in parallel reversedly; the capacitance branch is connected with the bridge arm with the midpoint drifting control in parallel; the capacitance branch is formed by two series capacitors C1 and C2; and one end of the inductor L1 is connected with the point of common coupling (PCC) of the two semiconductor switches G1 and G2, and the other end of the inductor L1 is connected with the PCC of the two series capacitors C1 and C2, as well as a midcourt line in the three-phase four-wire convertor is led out, namely an N line. In the invention, the bridge arm in a midpoint control circuit and three bridges of a three-phase convertor can be controlled respectively and independently, thus realizing decoupling control of a three-phase four-bridge arm convertor. Under the condition of three phase imbalance, simple voltage current feedback control or proportional-integral (PI) control is used to control the midpoint, so that the midpoint drifting control can be finished.

A circuit for attenuating a surge is disclosed that might include a conductor for receiving the surge, a capacitor, positioned along the conductor, for blocking the surge, and a gas tube having a first end coupled to the conductor and a second end coupled to a ground. The circuit might also include a transformer having a first wire and a second wire, the transformer being coupled to the conductor, a resistor coupled to the first and second wires of the transformer, a varistor coupled to the first wire of the transformer, and a diode coupled to the second wire of the transformer.

A method for measuring the mean velocity (V_H) of an extracorporeal blood fluid or infusion fluid, by means of retroinjection interferometry, comprises the step of emitting a first laser light beam (41), from the laser cavity (40) of a semiconductor laser source (60), reflection of a second laser beam (45) by the fluid (50) and consequent generation of interference with the first laser beam (41) inside the laser cavity (40), detection of the interference signal by a monitoring photodiode (46), and processing, by means of an electronic processing and control circuit (100), of the interference signal detected. The invention also comprises an apparatus (62) for implementing the method described and an extracorporeal circuit (58) comprising said apparatus. The invention also comprises a method for replacing a laser source in said apparatus.

The invention is related to a structure of a light emitting diode lamp tube, comprising: a lamp tube housing; a circuit board; a supporting seat; a lamp bar; a second connecting seat; and a lamp shade. The circuit board is positioned in the accommodation space of the lamp tube housing, the supporting seat is slidingly combined with convex lugs of the side cover of the lamp tube housing to cover the accommodation space; the supporting seat has an opening, which allows the first connecting seat of the circuit board to be exposed by the opening. The lamp bar is positioned on the supporting seat; the second connecting seat is electrically connected with the lamp bar and the first connecting seat, and the lamp shade is combined with the lamp tube housing to form the exterior of the lamp tube. By hiding the circuit board used for power conversion in the lamp tube housing, electronic components on the circuit board can carry out heat radiation by utilizing the lamp tube housing; then, the service life of the light emitting diode lamp tube can be prolonged.

A light-emitting diode (LED) lamp comprises a lamp holder which is like a hollow cavity and is provided with an opening, an LED module arranged in the cavity of the lamp holder and a lampshade covering the opening of the lamp holder and the LED module. The lamp holder comprises a lengthwise groove-shaped installation rack and two baffles respectively arranged at two opposite ends of the installation rack. Two accommodating grooves respectively positioned at two opposite sides of the installation rack are arranged at the top of the installation rack. A base plate is stuck between each baffle and the installation rack. The tops of the base plates, the end edge of the lampshade and the tops of the baffles encircle two grooves together. The two grooves are respectively positioned at two opposite ends of the opening of the lamp holder. The grooves and the accommodating grooves surround the opening of the lamp holder and accommodate sealing glue so as to connect the lampshade and the lamp holder in a sealed manner. Compared with the prior art, the invention is characterized in that the structures of the accommodating grooves and the grooves ensure the sealing glue to be uniformly distributed, thus improving the overall sealing property of the lamp and being not easy to befoul the transparent lampshade so as to affect the lighting effect and the appearance of the lamp.

The invention discloses an area light source equipment, it includes at least a light emitting diode, at least a reflector and an optical leading board, which at least includes an incident face, an emergent face, an underside which is according to the emergent face, and several flanks. The reflector is a groove with two lateral walls, it is located on one side of the optical leading board and clamp with it to form a cavity to contain the light emitting diode.

The invention relates to a three-port DC/DC converter for high-power charging and belongs to the technical field of automobile driving and control. The three-port DC/DC converter solves the problem that a traditional non-isolated buck topology cannot freely and simultaneously realize high-power charging and the control of the free charge-discharge requirements of a battery. An input capacitor is connected in parallel with a voltage source; the positive pole of the voltage source is connected to the drain of a switching transistor Q1; the source of the switching transistor Q1 is connected to the cathode of a diode D1; the anode of the diode D1 is connected to the negative pole of the voltage source; the source of a switching transistor Q2 is connected to the cathode of the diode D1; the drain of the switching transistor Q2 is connected to the cathode of a diode D2; the anode of the diode D2 is connected to the positive pole of a battery; the negative pole of the battery is connected tothe anode of the diode D1; one end of an inductor L1 is connected to the source of the switching transistor Q2; the other end of the inductor L1 is connected to the drain of a switching transistor Q3;the source of the switching transistor Q3 is connected to the anode of a diode D3; the cathode of the diode D3 is connected to the positive pole of the battery; one end of an output capacitor is connected to the drain of the switching transistor Q3; and the other end of the output capacitor is connected to the negative pole of the battery. The three-port DC/DC converter is suitable for automobiledriving and control.

An image sensor with color filters capable of minimizing a distance through which incident light reaches photodiodes and flattening the color filters by minimizing step heights among color filters, and a method of manufacturing the same are provided. In the image sensor with the color filters, a metal is doped into an interlayer insulating SiO₂ layer opened through a photosensitive film, and the color filters of red, green, and blue are formed in the interlayer insulating SiO₂ layer through a heat treatment. In this case, a color filter array can be flattened by removing step heights among color filters generated in an conventional method in which the interlayer insulating SiO₂ layer is sequentially coated with the color filters of red, green, and blue so as to form a color filter array. In addition, the distance through which the incident light reaches the photodiodes can be reduced by forming the color filters in the interlayer insulating SiO₂ layer, thereby improving the sensitivity of the image sensor.

The invention discloses a complementary type resistive random access memory and preparation method thereof. The complementary type resistive random access memory includes a bottom layer conductive oxide electrode, a CuO storage medium layer arranged on the upper surface of the bottom layer conductive oxide electrode and a ZrO storage medium layer arranged on the upper surface of the CuO storage medium layer. The method is as follows: direct current magnetron sputtering is adopted to prepare a conductive oxide thin film on a Si substrate, magnetron sputtering is adopted to prepare a CuO storage medium layer on the upper surface of the conductive oxide thin film, magnetron sputtering is adopted to prepare a ZrO storage medium layer on the upper surface of the CuO storage medium layer, and magnetron sputtering is adopted to prepare a W electrode on the upper surface of the ZrO storage medium layer. The complementary type resistive random access memory structure solves the problem of crosstalk of a cross array resistive random access memory without additionally using a diode or triode, and has the characteristic that a circuit is simple.