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Optional LCD monitor ten parameters 1, <br> <br> viewing area at the time of purchase of the LCD monitor, the first consideration is the "face" size. For LCD monitors, the size of the panel is the size of the visible area, which is somewhat different from the CRT monitor. Monitors with the same specifications also have larger LCDs than CRTs. A typical 15-inch LCD is equivalent to a 17-inch CRT, a 17-inch LCD is equivalent to a 19-inch CRT, and a 19-inch LCD is equivalent to a 21-inch CRT. At present, the LCD monitor has 3.5-inch, 5.6-inch, 7-inch, 8-inch and other vehicle-mounted monitoring display, 10.4 inches, 12 inches, 15 inches, 17 inches, 19 inches, 20.1 inches for 4:3 display ratio, 22 inches, 26 inches 32-inch, 37-inch, 40-inch, 42-inch, 47-inch, 52-inch, 55-inch, 65-inch, 70-inch, and 82-inch are 16:9 display ratios. 
2, panel level
The bad spots and highlights of LCD panels are still another important criterion for judging the quality of monitors. Bad points are divided into bright spots, dark spots, and color spots, which refer to unrepairable physical pixels on the LCD panel. The LCD screen is divided into several levels according to the difference of the parameters such as dead pixels, color purity, and viewing angle: A+ level: LCD screen without any dead pixels is A+ level; A level: within 3 bad pixels, where no more than one bright point, The highlights are not in the central area of ​​the screen; Level B: 5 points or less, including no more than two highlights, and the highlights are not in the central area of ​​the screen; Level C: More than 3 bad points.
3, brightness
The brightness of the LCD monitor refers to the brightness of the display screen, which is the maximum brightness that the LCD monitor can achieve under the white screen. The unit is Candelas per square meter (cd/m2) or nits. The brightness of the LCD monitor is mainly determined by the brightness of the backlight. The brightness of the backlight is controlled, that is, the brightness of the LCD monitor is controlled.
4, contrast
The ratio of the brightest to the darkest brightness of the same point on the LCD screen is the contrast of the LCD monitor. A high contrast means a relatively high brightness and a bright color. The LCD monitor has a contrast ratio of 500:1, 1000:1 or higher.
5, the response time <br> <br> Currently, the biggest selling point is the LCD monitor and improve the response time of 25ms from the beginning to today's grayscale 4ms, faster fast breathtaking. The response time determines the number of picture frames that the monitor can display per second. Usually when the picture display speed exceeds 25 frames per second, the human eye will regard the fast-converted picture as a continuous picture. In the high-speed ball operation, when the screen is switched/moved at a high speed, to achieve the best display effect, the screen display speed must be more than 60 frames per second, and the response time should be within 16 ms to meet the requirement. That is, the smaller the response time, the faster The more perfect the effect displayed by the changing picture.
6, color reproduction
The color gamut is a method of encoding a color, and also the sum of colors that a technical system can produce. The color gamut of ordinary LCDs is about 72%. The LCD screens selected by Fortunate Digital use high color gamut LCD screens in order to display richer colors. The color gamut is as high as 92%. Therefore, the color of the display is more abundant and the color depth of the LCD monitor is improved.
7, visual angle
Since the liquid crystal monitor's light is projected forward through the liquid crystal at a nearly vertical angle, when we look at the screen from other angles, we do not see the CRT monitor as clearly as we can see. Obvious color distortion. This is caused by the size of the viewing angle. Specifically, the viewing angle is divided into a horizontal viewing angle and a vertical viewing angle. When selecting the LCD monitor, products with a large viewing angle should be selected as much as possible. The viewing angle (vie wangle) of the LCD monitor is also called the viewing angle range, including two indicators of horizontal viewing angle and vertical viewing angle. The horizontal viewing angle display means that the vertical axis of the display screen is perpendicular to the vertical axis of the display screen. Left and right can still see the normal display image at a certain angle. This angle range is the horizontal viewing angle of the LCD monitor. Similarly, if the horizontal axis prevails, the upper and lower viewing angles are called vertical visibility. angle. The remote LCD monitor uses a wide viewing angle LCD screen with up and down viewing angles of up to 89 degrees.
8, the signal Intelligent Arc extinction afterimage blur function smart <br> <br> principle of digital image processing chip will stop monitoring input, according to the root mean square value of each frame image of the input image signal to judge whether For a still image or a moving image, the RMS value reflects the average brightness level and light-dark distribution of the input image. From this parameter, we can determine the characteristics and differences of each frame of the input signal, if the input image is a period of time. After a still image, the system activates the residual image engine. This engine automatically moves the format of the input signal according to the static or active state of the input image, resulting in a slight and rapid change in the position of the input image on the screen. The long-term, no-change control of the liquid crystal molecules is eliminated, and this long-term, static control voltage for the liquid crystal molecules is just the root cause of the afterimage generated by the liquid crystal screen after a long time of playing a still image. After the rapid and minor transformation of the still image input by the residual image engine, the liquid crystal molecules have a chance to breathe for a certain period of time, thus avoiding the permanent damage to the liquid crystal screen and achieving the purpose of eliminating the afterimage.
9, signal support
A complete set of monitoring projects is required to be composed of many devices. The more common ones are cameras, hard disk recorders, picture splitters, distributors, amplifiers, arrays, networks*, multi-screen processors, etc. Each type of device is different. There are different signal input and output interfaces. In order to take into account the smooth progress of the overall project, after many front-end equipments are deployed and the terminal signal output is determined, the corresponding monitor should be selected next to cater for the monitoring project. The demand for the digital LCD monitor series produced by Yuanner Digital has rich interfaces such as BNC/component/S-VIDEO/VGA/HDMI/DVI, which enables it to achieve perfect connection with almost all monitoring front-end devices on the market. 
10, overall stability
When a monitor forms a closed-circuit monitoring system, it usually needs 24 hours a day and 365 days of continuous power-on use each year (while TVs usually only work for a few hours each day), and some monitors may have a poor application environment. Requires higher reliability and stability of the monitor. Compared with televisions, in terms of design, the monitor's current, power consumption, temperature and resistance to electrical interference, the ability and margin of electric shock, and the average time between failures are much longer than those of TV sets. At the same time, the monitor must also The use of a fully shielded metal shell ensures electromagnetic compatibility and interference performance; in the selection of components, the characteristics of the components used in the monitor, such as voltage resistance, current, temperature, and humidity, are higher than those used in televisions; In the installation and debugging, especially the components and the aging process requirements, the monitor's requirements are also higher, the aging of the whole TV set is usually power on the assembly line at room temperature for about 8 hours, and the whole monitor Aging requires aging for more than 24 hours in the aging pipeline of a high-temperature, high-humidity, sealed environment to ensure the stability of the entire machine. Components used in televisions are not suitable for continuous use without interruption. If you force the use of a TV as a monitor, it is prone to malfunction. If it is severe, it may cause an accident due to the high operating temperature of the TV.
How to choose the right monitor?
As an integral part of the closed-circuit monitoring system (cctv), the monitor is an important back-end product, whether it can realistically display or output, and is essential for monitoring and postmortem evidence. To do monitoring, the picture quality is the most direct and convincing. If the picture quality is not good, the entire project is perfect and it is a failure project. However, LCD TVs in the market are all exquisite, and people are unable to start. There are also a wide variety of LCD monitors and people are dazzled. As a consumer, choosing a quality, consistent, stable LCD monitor does not seem easy. At one time, in order to save money, LCD monitors were used in place of LCD monitors, but in the end they "paid an expensive tuition fee."