fkb electrical components Germany fkb model fkb price

fkb electrical component is an electrical control device. It is an electrical appliance that causes a predetermined step change in the controlled variable in the electrical output circuit when the change in the input quantity (excitation quantity) meets specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). It is usually applied in automated control circuits; it is essentially an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays roles such as automatic regulation, safety protection, and circuit switching in the circuit. A relay is an electrical control device that can apply a specified input quantity for a sufficient duration to cause a predetermined step change in the controlled variable in the electrical output circuit. When the input quantity drops to a certain level and remains there for a sufficient duration, it returns to its initial state.

fkb electrical component principle

A DC power supply has two electrodes: positive and negative. The positive electrode has a high potential, and the negative electrode has a low potential. When the two electrodes are connected to a circuit, they maintain a constant potential difference between the two ends of the circuit, thereby forming a current from the positive electrode to the negative electrode in the external circuit. Relying solely on the difference in water levels cannot maintain a steady water flow; however, by using a water pump to continuously send water from a lower level to a higher level, a certain water level difference can be maintained to form a steady water flow. Similarly, relying solely on the electrostatic field generated by electric charges cannot maintain a steady current. By using a DC power supply, non-electrostatic forces (abbreviated as "non-electrostatic force") can be used to return positive charges from the negative electrode with lower potential through the interior of the power supply to the positive electrode with higher potential, thereby maintaining the potential difference between the two electrodes and forming a steady current. Therefore, a DC power supply is an energy conversion device that converts other forms of energy into electrical energy to supply the circuit, maintaining the steady flow of current.

fkb electrical component structure

1. Liquid crystal panel: The liquid crystal panel includes a polarizing film, glass substrates, black matrix, color filters, protective film, common electrodes, alignment layer, liquid crystal layer (liquid crystal, spacers, sealant), capacitors, display electrodes, prism layer, and diffuser layer. The polarizing film is also known as a polarizer; polarizers are divided into upper and lower polarizers. The polarization functions of the upper and lower polarizers are perpendicular to each other. Their function is like a fence, blocking light wave components as required; for example, they block light wave components perpendicular to the polarizer fence and only allow light wave components parallel to the fence to pass through. 2. Glass substrate: In liquid crystal displays, glass substrates are divided into an upper substrate and a lower substrate. Their main function is to hold the liquid crystal material in the space between the two substrates. The material for glass substrates is generally alkali-free borosilicate glass with excellent mechanical properties, heat resistance, and chemical corrosion resistance. For TFT-LCD, one glass substrate is distributed with TFT, while the other glass substrate is deposited with color filters. 3. Black matrix: The black matrix uses highly light-shielding materials to separate the red, green, and blue primary colors in the color filters (to prevent color mixing) and to prevent light leakage, thereby improving the contrast of each color block. In addition, in TFT-LCD, the black matrix can conceal internal electrode wiring or thin-film transistors. Color filters, also known as color filter films, function to produce 3 primary colors of light (red, green, and blue), enabling full-color display on the liquid crystal display. 4. Alignment film: The alignment film, also known as an orientation film or alignment layer, functions to enable uniform arrangement and orientation of liquid crystal molecules at the microscopic level. 5. Transparent electrodes: Transparent electrodes are divided into common electrodes and pixel electrodes. The input signal voltage is applied between the pixel electrodes and the common electrodes. Transparent electrodes are typically formed by depositing indium tin oxide (ITO) material on the glass substrate to create a transparent conductive layer. 6. Liquid crystal material: In LCD, the liquid crystal material acts like a light valve, controlling the brightness of transmitted light to achieve information display. 7. Driver IC: The driver IC is essentially a set of integrated circuit chip devices used to adjust and control the phase, peak value, frequency, and other parameters of the potential signals on the transparent electrodes, establishing a driving electric field to ultimately realize information display on the liquid crystal panel. In liquid crystal panels, active-matrix liquid crystal displays are constructed by sealing twisted nematic (TN) liquid crystal material between two glass substrates. The upper glass substrate (closer to the display screen) is deposited with red, green, and blue (RGB) color filters (also known as color filter films), a black matrix, and a common transparent electrode. The lower glass substrate (the substrate farther from the display screen) is equipped with thin-film transistor (TFT) devices, transparent pixel electrodes, storage capacitors, gate lines, signal lines, etc. Alignment films (or alignment layers) are prepared on the inner sides of the two glass substrates to orient the liquid crystal molecules. Liquid crystal material is injected between the two glass substrates, and spacers are dispersed to ensure uniform gap thickness. The periphery is bonded with frame sealant for sealing purposes, and the common electrodes of the upper and lower glass substrates are connected using silver dot adhesive technology. Polarizers (or polarizing films) are attached to the outer sides of the upper and lower glass substrates, respectively. When a voltage is applied between the pixel transparent electrodes and the common transparent electrodes, the alignment state of the liquid crystal molecules changes. Consequently, the intensity of incident light passing through the liquid crystal also changes. Liquid crystal displays leverage the optical rotatory power of the liquid crystal material combined with electric field control to achieve information display. 8. Backlight module: LCD products are non-emissive electronic devices that do not possess inherent light-emitting properties; they must rely on light emission from the source in the backlight module to achieve display performance. Therefore, the brightness of LCD is determined by its backlight module. Thus, the performance of the backlight module directly affects the display quality of the liquid crystal panel. The backlight module includes illumination sources, reflectors, light guide plates, diffuser sheets, brightness enhancement films (prism sheets), and frames. Backlight modules used in LCD can be mainly classified into two categories: edge-lit backlight modules and direct-lit backlight modules. Mobile phones, laptops, and monitors (15 inches) mainly adopt edge-lit backlight modules, while LCD televisions mostly use direct-lit backlight module light sources. Cold cathode fluorescent lamps and light-emitting diodes are the primary backlights for LCD. 9. Reflector: The reflector, also known as a reflection cover, mainly functions to direct all light emitted by the source into the light guide plate, minimizing unnecessary loss as much as possible. 1. Light guide plate: The main function of the light guide plate is to guide light from the side light source to the front of the panel. 11. Prism sheet: The prism sheet, also known as a brightness enhancement film, mainly functions to concentrate scattered light through refraction and total internal reflection within the film layer, emitting it from the backlight source at specific angles to achieve a screen brightening effect.16. Diffusion sheet: The main function of the diffusion sheet is to correct the edge-lit light from the backlight module into a uniform surface light source to achieve optical diffusion. Diffusion sheets are divided into upper diffusion sheets and lower diffusion sheets. The upper diffusion sheet is located between the prism sheet and the LCD assembly, closer to the display panel. The lower diffusion sheet is located between the light guide plate and the prism sheet, closer to the backlight source.

fkb electrical component function

The main functions of a potentiometer in a circuit include several aspects: 1. Used as a voltage divider. A potentiometer is a continuously adjustable resistor. When adjusting the knob or slider of the potentiometer, the moving contact slides on the resistive body. At this time, an output voltage related to the external voltage applied to the potentiometer and the angle or travel of the movable arm can be obtained at the output terminal of the potentiometer. 2. Used as a rheostat. When a potentiometer is used as a rheostat, it should be connected as a two-terminal device. In this way, a smoothly and continuously changing resistance value can be obtained within the travel range of the potentiometer. 6. Used as a current controller. When a potentiometer is used as a current controller, one of the selected current output terminals must be the terminal led out from the sliding contact.

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