The difference between LCD splicing screen and LCD TV. Balancing the advantages and disadvantages of features and technical conditions is the first step in the selection process of LCD screen splicing. Moreover, the application of LCD splicing screens in digital signage devices is different from products that are usually consumer-oriented. The following seven basic factors should be considered when choosing. First, the stability of the whole machine (including use time, anti-interference, etc.) When a large LCD splicing screen constitutes a digital signage system, it usually needs 24 hours a day, 365 days a year without interruption of power supply (and TV sets usually only work for a few hours a day), and the application environment of some splicing screens may be harsh. This requires higher reliability and stability of the LCD splicing screen. Compared with the TV set, in terms of design, the current, power consumption, temperature and resistance to electrical interference, electrical shock and the ability and margin of the LCD splicing and the average trouble-free use time are much longer than the TV, and the LCD splicing screen also A fully shielded metal shell must be used to ensure electromagnetic compatibility and interference performance; in the selection of components, the characteristics of the components used in the LCD splicing screen, such as withstand voltage, current, temperature, humidity, etc., are higher than those used by TV sets. Devices; and in the installation, debugging, especially the process requirements of components and the aging of the whole machine, the requirements of the LCD splicing screen are also higher. When the TV is manufactured, the aging of the whole machine is usually about 8 hours at room temperature on the assembly line, and the LCD splicing The aging of the whole screen needs to be energized and aged for more than 24 hours on the aging pipeline in a closed environment with high temperature and high humidity to ensure the stability of the whole machine. Second, the image clarity The LCD splicing display has the function of intuitively reflecting the image quality, plus the full 1920 * 1080 resolution. For the selection of display devices in the digital signage field, the LCD splicing screen is the preferred splicing screen, and the professional splicing screen resolution is automatically adjusted according to the display output Resolution (can be supported regardless of horizontal or vertical); its high reliability and high-definition display capability will ensure that you can edit the recorded high-definition video and audio, and the video signal is completely displayed in front of the viewer. Conversely, LCD TVs only support several common TV resolutions specified in the manual. Since there are only a few resolutions of civilian TV signals, as long as the TV LCD performs effect processing according to several common resolutions used by civilian users, special resolutions will cause flowering. Third, the degree of color reproduction If the clarity is mainly determined by the amplitude and frequency characteristics of the video channel, the degree of reproduction is mainly determined by the chrominance and brightness signals of the three primary colors of red (R), green (G), and blue (B) in the LCD splicing screen. Determined by the phase. Since the LCD splicing screen usually observes a static image, the requirements for the color reproduction of the splicing screen are higher than that of the TV. Therefore, the video playback channel of the professional splicing screen should be processed in brightness, chroma and R, G, B Equipped with accurate compensation circuit and delay circuit to ensure the phase synchronization of the bright / color signal and the R, G, and B signals. On the contrary, LCD TVs are subject to the requirements of the use environment, and the image is displayed after being touched up. It cannot fully reflect the actual effect. Fourth, the use of machine materials Due to the requirements of the use environment, the metal part of the LCD TV machine shell is made of metal. And the internal board lines are all industrialized design, not easy to aging; the embodiment of energy saving and environmental protection concept: Samsung seamless LCD splicing wall UD55A, unlimited "vision" low energy consumption design; use of environmental protection materials. Regular appearance, easy for splicing, combined installation and other industrial needs. On the contrary, the entire LCD TV casing is made of non-metallic materials. The internal board line is designed for civilian use, and it will easily cause aging of the machine parts after a long time of startup. In addition, the appearance of civilian TV is mostly irregular appearance, with digital signage splicing screen system, appearance arc system and other auxiliary facilities for hearing and vision, the overall appearance and effect of the construction will be greatly reduced. Fifth, the port LCD splicing screens mostly use industrial ports such as RGBBNC color difference with self-locking mechanism interface and professional DVI-D video interface; on the contrary, LCD TVs do not have BNC self-locking color difference input interface and DVI-D interface; Sixth, control interface The LCD splicing screen can be controlled by S232 serial port, and the open control password can be up to more than 200 school hospital solutions, adapting to various industrial environments. When it is convenient to use multi-splicing screen, all display devices can be controlled without remote controller, and it can assist various industrial requirements such as auxiliary startup, scheduled startup, delayed startup, and machine self-check. LCD TV can also be controlled by S232 serial port. However, only the control commands possessed by the remote controller can be realized. Industrial control cannot be achieved. Seventh, fanless architecture The LCD splicing screen is designed with no mechanical exhaust fan to maintain air circulation and heat dissipation Enterprise unit solutions to avoid the problems of dust and fan noise caused by the mechanical exhaust fan. When the internal temperature rises due to unknown reasons, the LCD splicing screen is automatically controlled The backlight system keeps the temperature below the maximum operating temperature. On the contrary, LCD TVs have no strict requirements due to the application environment.
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