Monitor is an integral part of the closed-circuit surveillance system (cctv) is the display part of the monitoring system, monitoring system, standard output, have the monitor display to view the image of the front-end to send over. As an essential part of the terminal equipment of video surveillance, and serve as the "eyes" of the monitoring personnel also play a key role after withered investigation. Monitor the development experiences of black and white to color, from the flashing to flashing from the CRT (cathode ray tube), LCD (liquid crystal), the development process, each process is a great qualitative leap. Monotonous world of surveillance images from black and white to color, making towards a colorful, colorful, lifelike images of the world; from flashing to flashing, to monitor staff health; from the CRT (cathode ray tube) to LCD (liquid crystal ) brought environmental protection, this is the final goal of the monitor. Monitor size: 15/17/19/20/22/26/32/37/40/42/46/52/57/65/70/82 inch monitors. Color: color, black and white monitor. Material: CRT, LED, DLP, LCD and other. Scanning: flat, progressive scan. Points by screen: flat, S & P screen, spherical, etc.. Brands: TCL monitors, Hizor monitor, SONY monitor, the JVC monitor, G & S, etc., in accordance with zoning: Security monitor monitoring monitors, television monitors, industrial monitors, computer monitors, Type: LCD monitor rear projection CRT monitor, plasma, high definition LCD monitor, saving, long life (up to 80,000 hours), low maintenance costs, the drawback is that when stitching patchwork, now 40, 42 46-inch LCD monitor splicing gap is probably the 20MM around the characteristics of the rear projection is a patchwork, the drawback is that bulky, power consumption, short life (typically 5000 hours want to change the light bulb) and low brightness (bright middle four weeks dark) CRT the product is replaced by the remaining three products. The advantages of the plasma is high contrast and brightness. The drawback is not suitable for displaying a static screen (likely to cause burns of the screen), low power consumption, stitching patchwork. Monitor resolution, with the camera the same lines,