str elektronik electrical components German str elektronik model str elektronik price

str elektronik electrical components are active-matrix liquid crystal displays driven by thin-film transistors. They primarily use current to stimulate liquid crystal molecules to generate points, lines, and planes, which combine with backlights to form images. IPS, TFT, and SLCD are all subclasses of LCD. Their operating principle involves changing the alignment of liquid crystal molecules under an electric field, thereby altering (modulating) the transmittance of external light sources to achieve electro-optical conversion. Different excitations of the R, G, and B primary color signals are then used through red, green, and blue color filter films to reproduce color in the time and spatial domains.

str elektronik electrical component structure

The basic structure of a voltage transformer is very similar to that of a transformer; it also has two windings, one called the primary winding and the other called the secondary winding. Both windings are mounted on or wound around the iron core. Insulation exists between the two windings and between the windings and the iron core, providing electrical isolation between the two windings and between the windings and the iron core. During operation, the primary winding N1 is connected in parallel to the line, and the secondary winding N12 is connected in parallel to instruments or relays. Therefore, when measuring voltage on high-voltage lines, although the primary voltage is very high, the secondary side is low voltage, ensuring the safety of operators and instruments.

str elektronik electrical component principle

A Schottky diode is a metal-semiconductor device made using noble metals (gold, silver, aluminum, platinum, etc.) A as the anode and N-type semiconductor B as the cathode, utilizing the rectifying characteristics of the barrier formed at their contact surface. Because there are a large number of electrons in the N-type semiconductor and only a very small number of free electrons in the noble metal, electrons diffuse from the high-concentration B to the low-concentration A. Clearly, there are no holes in the metal A, so there is no diffusion movement of holes from A to B. As electrons continuously diffuse from B to A, the electron concentration on the surface of B gradually decreases, disrupting surface electrical neutrality and forming a barrier whose electric field direction is B → A. However, under the influence of this electric field, electrons in A also undergo drift motion from A → B, thereby weakening the electric field formed by the diffusion motion. When a space charge region of a certain width is established, the electron drift motion caused by the electric field and the electron diffusion motion caused by the concentration difference reach a relative balance, forming the Schottky barrier. The internal circuit structure of a typical Schottky rectifier uses N-type semiconductor as the substrate, on which an N-epitaxial layer doped with arsenic is formed. The anode uses materials such as molybdenum or aluminum to create a barrier layer. Silicon dioxide is used to eliminate the electric field in the edge region, increasing the withstand voltage of the tube. The N-type substrate has a very small on-state resistance, and its doping concentration is 108% times higher than that of the H-layer. An N+ cathode layer is formed beneath the substrate to reduce the contact resistance of the cathode. By adjusting structural parameters, a Schottky barrier is formed between the N-type substrate and the anode metal.

str elektronik electrical component function

Modulated pulses generated by the oscillation circuit pass through the reflection circuit, and light pulses are radiated by the LED GL. When the measured object enters the effective range of the receiver, the reflected light pulses enter the phototransistor DU. In the receiving circuit, the light pulses are demodulated into electrical pulse signals, amplified, and synchronously gated and shaped. Interference is then eliminated using digital integration or RC integration methods. Finally, the photoelectric switch control signal is output by triggering the driver after a delay (or without delay). Photoelectric switches generally have good hysteresis characteristics, so even if the detected object shakes within a small range, it will not affect the output state of the driver, keeping it in a stable operating zone. Meanwhile, the self-diagnosis system can display the light-receiving status and stable operating zone to monitor the work of the photoelectric switch at any time. Proximity switches are widely used in aviation, aerospace technology, and industrial production. In daily life, they are applied in automatic doors in hotels, restaurants, and garages, as well as in automatic hot air blowers. For security and anti-theft purposes, important locations such as archives, accounting departments, financial institutions, museums, and vaults are usually equipped with anti-theft devices composed of various proximity switches. In measurement technology, such as for length and position measurements, and in control technology, such as for the measurement and control of displacement, speed, and acceleration, a large number of proximity switches are also used.

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