[ Huaqiang Security Network News ] Speaking of monitors is much simpler than TV sets. There may be no TV signal receiving system, audio system, and some complicated lace functions. It is easy to be mistaken for TV. Simplify the product, in fact, the monitor performance is much higher than the TV in the imaging performance, and the price of the same size is also expensive. The specific reasons are mainly reflected in the following three aspects. 
The difference between the TV and the monitor 1. The contrast of the definition <br> The unit of calculation of the definition is the "line". The popular point refers to the number of lines that the TV can distinguish in the horizontal direction. Since the traditional TV set receives the RF signal transmitted by the TV station, the video image bandwidth corresponding to this signal is usually less than 6M. Therefore, the CRT of the old-fashioned CRT TV is usually only about 400 lines. Imagine that we purchased HD 540 lines or even 600 lines of analog surveillance cameras, I thought it could be more clear, but if used in conjunction with TV, but can only play to the level of 400 lines, we must know that the price of 540 line cameras can buy 2 420 lines of products. It's not very wasteful, but the monitor can do this easily. Generally, it has a high image clarity, which is 600 lines. Therefore, the professional monitor should have a channel circuit compared to the traditional TV set. The bandwidth compensation and boosting circuit makes the passband wider and the image clarity higher. Some slightly better products can reach the 1250 line standard.
　 The difference between TV and monitor 2, color contrast <br> If the definition is mainly determined by the amplitude-frequency characteristics of the video channel, then the color reproduction is mainly caused by the chrominance and luminance signals of the three primary colors in the monitor. The phase is determined. The components of the monitor and the consumer TV are basically three pieces (phosphor, picture tube, color circuit matrix). However, this seemingly identical three pieces cause the essential difference between the monitor and the TV. The TV uses P22 phosphors. The color gamut of such phosphors is not completely defined at all, so based on such phosphors. The color of the TV set will be changed by different manufacturers; the phosphor used in the monitor is the EBU standard phosphor which is strictly defined by the color gamut, and the color blocks composed of the three primary colors are strictly enforced. The division and definition, so it can reproduce the true color very accurately. Since the monitor is usually a static image, the color reproduction degree of the monitor is higher than that of the TV. Therefore, the viewing channel of the professional monitor should have accurate compensation circuit and delay in terms of brightness and chromaticity processing. The circuit, in order to ensure the phase synchronization of the bright/color signal and the three primary signals, the monitor has to faithfully reproduce the original signal, and the tiny errors can be seen on the monitor, and the monitor is very accurate.
　　 Differences between TVs and monitors 3. Steady contrast <br> When a monitor is constructed as a closed-circuit monitoring system, it usually takes 24 hours a day, 365 days a year to continuously and continuously work (and the TV usually only works for a few hours a day) And the application environment of some monitors may be harsh, which requires the reliability and stability of the monitor to be higher. Compared with TV sets, the monitor's current, power consumption, temperature and resistance to electrical interference, electrical shock capability and margin, and average trouble-free operation time are much larger than TV sets. At the same time, the monitor must also use a fully shielded metal enclosure to ensure electromagnetic compatibility and interference performance. In the selection of components, the components used in the monitor have higher voltage, current, temperature, humidity and other characteristics than the components used in the TV. In terms of installation, commissioning, especially the process requirements of components and aging, the requirements of the monitor 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 aging of the monitor needs to be galvanized for more than 24 hours in the aging line of high temperature and high humidity closed environment to ensure the whole machine. stability.
　 The difference between TV and monitor 2, color contrast <br> If the definition is mainly determined by the amplitude-frequency characteristics of the video channel, then the color reproduction is mainly caused by the chrominance and luminance signals of the three primary colors in the monitor. The phase is determined. The components of the monitor and the consumer TV are basically three pieces (phosphor, picture tube, color circuit matrix). However, this seemingly identical three pieces cause the essential difference between the monitor and the TV. The TV uses P22 phosphors. The color gamut of such phosphors is not completely defined at all, so based on such phosphors. The color of the TV set will be changed by different manufacturers; the phosphor used in the monitor is the EBU standard phosphor which is strictly defined by the color gamut, and the color blocks composed of the three primary colors are strictly enforced. The division and definition, so it can reproduce the true color very accurately. Since the monitor is usually a static image, the color reproduction degree of the monitor is higher than that of the TV. Therefore, the viewing channel of the professional monitor should have accurate compensation circuit and delay in terms of brightness and chromaticity processing. The circuit, in order to ensure the phase synchronization of the bright/color signal and the three primary signals, the monitor has to faithfully reproduce the original signal, and the tiny errors can be seen on the monitor, and the monitor is very accurate.
　　 Differences between TVs and monitors 3. Steady contrast <br> When a monitor is constructed as a closed-circuit monitoring system, it usually takes 24 hours a day, 365 days a year to continuously and continuously work (and the TV usually only works for a few hours a day) And the application environment of some monitors may be harsh, which requires the reliability and stability of the monitor to be higher. Compared with TV sets, the monitor's current, power consumption, temperature and resistance to electrical interference, electrical shock capability and margin, and average trouble-free operation time are much larger than TV sets. At the same time, the monitor must also use a fully shielded metal enclosure to ensure electromagnetic compatibility and interference performance. In the selection of components, the components used in the monitor have higher voltage, current, temperature, humidity and other characteristics than the components used in the TV. In terms of installation, commissioning, especially the process requirements of components and aging, the requirements of the monitor 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 aging of the monitor needs to be galvanized for more than 24 hours in the aging line of high temperature and high humidity closed environment to ensure the whole machine. stability.
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