fkb electrical components Germany fkb model fkb price

fkb electrical components are electrical control devices. When the change in the input quantity (excitation quantity) meets specified requirements, they cause a predetermined step change in the controlled quantity in the electrical output circuit. They have an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Typically applied in automated control circuits, they essentially function as "automatic switches" that use small currents to control the operation of large currents. Therefore, they play roles in automatic regulation, safety protection, and circuit switching in circuits. A relay is an electrical control device that can accept a specified input quantity and maintain it for a sufficient duration to cause a predetermined step change in the controlled quantity 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 higher potential, and the negative electrode has a lower 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, using a pump to continuously move water from a lower level to a higher level can maintain a certain water level difference, forming a steady water flow. Similarly, relying solely on the electrostatic field generated by electric charges cannot maintain a steady current. With the help of 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, maintaining the potential difference between the two electrodes and thus 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. LCD panel: The LCD panel includes polarizing films, glass substrates, black matrix, color filters, protective films, common electrodes, alignment layers, liquid crystal layer (liquid crystal, spacers, sealant), capacitors, display electrodes, prism layers, and diffusing layers. Polarizing films, also known as 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 perpendicular to the polarizer fence according to requirements, while only allowing light wave components parallel to the fence to pass through. 2. Glass substrate: In liquid crystal displays, glass substrates are divided into upper and lower substrates. 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 layer of glass substrate is distributed with TFT, while the other layer of 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 prevent light leakage, thereby helping to improve the contrast of each color block. Additionally, in TFT-LCD, the black matrix can conceal internal electrode wiring or thin-film transistors. Color filters, also known as color filter membranes, function to produce red, green, and blue 3 primary colors, achieving full-color display in liquid crystal displays. 4. Alignment film: The alignment film, also known as the orientation film or alignment layer, functions to allow liquid crystal molecules to achieve uniform arrangement and orientation 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 electrode and the common electrode. Transparent electrodes are typically formed by depositing indium tin oxide (ITO) material on glass substrates to create a transparent conductive layer. 6. Liquid crystal material: Liquid crystal material acts like a light valve in LCD, controlling the brightness of transmitted light to achieve information display effects. 7. Driver IC: Driver IC is essentially a set of integrated circuit chip devices used to adjust and control the phase, peak value, frequency, etc., of potential signals on transparent electrodes, establishing a driving electric field to ultimately achieve information display in liquid crystals. In LCD panels, active matrix liquid crystal displays are constructed by sealing twisted nematic (TN) liquid crystal material between two glass substrates. Among them, the upper glass substrate close to the display screen is deposited with red, green, and blue (RGB) tricolor filters (or color filter membranes), black matrix, and common transparent electrodes. 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; the common electrodes of the upper and lower glass substrates are connected using silver dot adhesive processes. 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 electrode and the common transparent electrode, the arrangement state of the liquid crystal molecules changes. At this time, the intensity of incident light passing through the liquid crystal also changes. Liquid crystal displays utilize the optical rotation property of liquid crystal materials combined with electric field control to achieve information display. 8. Backlight module: LCD products are non-emissive electronic devices that do not have inherent luminous 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 lighting sources, reflectors, light guide plates, diffusion sheets, brightness enhancement films (prism sheets), and frames. Backlight modules used in LCD can mainly be divided into two categories: edge-lit backlight modules and direct-lit backlight modules. Mobile phones, laptops, and monitors (15 inches) mainly use edge-lit backlight modules, while LCD TVs mostly use direct-lit backlight module light sources. Cold cathode fluorescent lamps and light-emitting diodes are the main backlight sources for LCD. 9. Reflector: The reflector, also known as the reflection cover, mainly functions to direct all light emitted by the light source into the light guide plate, minimizing unnecessary losses as much as possible. 1. Light guide plate: The main function of the light guide plate is to guide light emitted from side light sources to the front of the panel. 11. Prism sheet: Prism sheets, also known as brightness enhancement films, mainly function to concentrate scattered light through refraction and total reflection within the film layer, emitting it from the backlight source at a specific angle to achieve a screen brightening display 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 effects. Diffusion sheets are divided into upper and lower diffusion sheets. The upper diffusion sheet is located between the prism sheet and the liquid crystal 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 the following aspects: 1. As a voltage divider, a potentiometer is a continuously adjustable resistor. When the knob or slider of the potentiometer is adjusted, the movable contact slides along the resistive element. In this case, the output terminal of the potentiometer provides an output voltage that has a specific relationship with the applied voltage and the rotation angle or travel distance of the movable arm. 2. As a rheostat, when using a potentiometer as a rheostat, it should be connected as a two-terminal device. This allows for a smooth and continuous change in resistance value within the travel range of the potentiometer. 6. As a current controller, when the 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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