Interpretation: full color LED display features and identification skills

First, the main features of full-color LED display Full-color LED display is a kind of LED display, its main features are: (1) rich colors: display unit board from three primary colors (red, green, blue) The composition, red, green and blue 256 gray levels constitute 16,777,216 colors, so that the electronic screen can display dynamic images with rich colors, high saturation, high resolution and high display frequency; (2) Good effect: Using nonlinear correction technology, the image is clearer and the layering is stronger; (3) High reliability: using distributed scanning technology and modular design technology, reliability and stability are higher; (4) Super detection function: real-time Check whether the pixels in the screen are invalid, and the working state of the pixels is transmitted remotely; (5) The new mask design makes the light emitted by the LED almost zero reflection, ensuring the display effect of the screen; (6) High flatness: box Body flatness coefficient 0.5mm, power factor up to 88 or more; (7) Input signal diversification: support RF, S-VIDIEO, RGBTV, YUT, YC, COMPOSITION and other stage signals; (8) High waterproof performance: module back Waterproof rubber ring, the front is made of high quality imported glue for filling; (9) Durability: high temperature spraying technology, greatly improve rust prevention function; illuminating module is guaranteed for ten years, mask is not reflective, UV resistant, five years without fading Second, the full-color LED display accessory product material selection 1. LED lights and chips. The LED lamp is not only an LED tube, but also a key component of the LED electronic display. Therefore, it is necessary to use a reliable and well-packaged LED product. The selected LED products must have good stability, small dispersion, HBM greater than 4000V, low attenuation amplitude, high voltage resistance, brightness, wavelength, high angle consistency, good light distribution, and can withstand temperature differences, humidity and UV requirements. . 2. The box. The whole steel plate or aluminum is used, and the door opening structure is adopted. The top of the box is made of pins and the bottom is made of guide sleeves to ensure precise positioning between the boxes. The overall protection of the cabinet complies with the IP65 standard, and the structure must fully consider the heat dissipation problem. 3. Switching power supply. The display power supply adopts the famous brand switching power supply module that has passed the certification. All switching power supplies have undergone rigorous testing, screening and aging. Ensure full compliance with international safety and quality certification requirements to meet the long-term stability and reliability of the display. Under rated operating conditions. Ensure that the service life is greater than 10 years. 4. Connector. Connectors are important connecting devices in the system. High quality connector products should be used to ensure the thickness of the pure gold plating of the connector and maintain the best electrical connection performance. Ensure the system's good electrical connection performance under high temperature and high humidity environment, which can make the system run stably and reliably for a long time. 5. Circuit board. The circuit board is made of flame-retardant epoxy sheet, with reasonable design layout and trace specification to meet the requirements of electromagnetic compatibility and circuit stability. Processing manufacturers should choose products produced by well-known manufacturers. 6. Drive chip IC device. The drive circuit adopts the constant current drive chip of the international famous brand. Maintaining high-precision constant current output and high reliability over a wide temperature range results in significant improvements in display uniformity and reliability. The main materials of the display system should be certified by CE, FCC, UL, CCC, ISO9000, etc. It is believed that if we do the above, adhering to reliable supporting facilities materials and professional R&D design technology will definitely reduce the failure rate of the display, and will greatly improve the reliability and stability of the LED display. 3. Full-color LED display The quality of the full-color LED display can be determined from the following aspects: 1. Flatness. The surface flatness of the LED display should be within 1mm to ensure that the displayed image is not distorted. Local protrusion or recession may cause a blind angle in the viewing angle of the display. The quality of the flatness is mainly determined by the production process. 2. Brightness and viewing angle. The brightness of the indoor full color screen should be above 800cd/m2, and the brightness of the outdoor full color screen should be above 1500cd/m2 to ensure the normal operation of the display. Otherwise, the displayed image will not be seen because the brightness is too low. The brightness is mainly determined by the quality of the LED lamp bead. The size of the viewing angle directly determines the number of LED display audiences, so the bigger the better. The size of the viewing angle is primarily determined by the way the die is packaged. 3. White balance effect. White balance is one of the most important indicators of LED displays. In color theory, when the ratio of the three primary colors of red, green and blue is 1:4.6:0.16, pure white will be displayed. If there is a slight deviation in the actual ratio, the deviation of white balance will occur. Generally, it should be noted whether white is blue or yellow. Green phenomenon. The quality of the white balance is mainly determined by the control system of the LED display, and the lamp beads also have an effect on the color reproduction. 4. The reduction of color. The redness of color refers to the reduction of color by the LED display. The color displayed by the LED display should be consistent with the color of the source to ensure the realism of the image. 5. Product design. There are many kinds of full-color LED display screens, indoor and outdoor energy-saving high-brightness, high-speed refreshing and portable products, and all kinds of industries have different requirements for LED display, so buyers can distinguish between LED display and LED display. To gather their own needs, whether the manufacturer's LED display products can meet their needs to the greatest extent. 6. Material control. The selection of materials plays a decisive role in the quality of the LED display screen at the source. Therefore, it is the focus of the inspection for the purchaser. 1) LED lamp high-grade represents Nichia Cree (chip package) mid-range crystal Yuan Guanglei Shilan (chip), LED lights related to the LED industry chain, especially the domestic packaging industry, the same crystal Yuanshilan Due to the different LED quality of the chip manufacturers, the high-end LED lamp packaging tube represents the billion-light (Taiwan) national star Lehman. 2) LED driver IC: As one of the world's leading LED driver manufacturers, Accumulation Technology has been ranked first in the world in LED display driver field for many years. It has achieved a domestic LED display of 60 super-displays, and the global market share of 50% is 5024. Most of the high-end LED display products are selected. 3) Power socket (enhanced type): The power socket is the main component to connect the power cable to the PCB board. Although it is not the main aspect that determines the quality of the LED display, its durability and electrical conductivity also affect the display screen. Life and protection level. 4) Pin header (with simple horn): The pin header is the main component of the control circuit and the PCB board control circuit connected by the cable. It is better to use the horn with the horn. It not only prevents the cable from being inserted and reworked when the screen is installed, but also It can effectively prevent the needles from being exposed to the screen and maintenance personnel. 5) Resistor, capacitor and other components: As the saying goes, there is no detail. Because the LED display often switches on and off, the quality of the capacitor also affects the protection of the display screen when the switch is turned on. The resistor is the main control circuit current. Components, there are preferred brand products. 6) LED module mask and bottom case: the main material is plastic. Imported high-quality materials, anti-deformation, strong environmental resistance.


Range of application:

1.Mainly used for making raw material become clinker processing with wetting, steaming and frying.

2 .Can be used to soften of oil plants.

Operating principle:

1.The raw materials will be into the pot from the top.

2. Stirring constantly with the aid of heat source.

3 .Water or steam (wet) the raw materils, heating (steaming the material). Drying (Frying).

4 .Can process different oil plants continuously.

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