1. LCD PANEL IS VERY IMPORTANT
In security monitor, the quality of LCD panel determines the video brightness, contrast, clarity etc. Besides, its mass production, market trend and other many aspects will affect the quality. So that, when we choose the monitor, we suggest you to choose well-known brand products, these products come with mature technology and high quality. Currently, the quality of LCD panel can be classified with ABC three different grade, although there is no mandatory regulation, commonly LCD panels only have maximum 1 pixel defect are A grade, while C grade panels have more than 3 pixel defects. Rarely manufacturers can produce LCD panels have no pixel defect, therefore, if consumers buy the LCD monitors, you must carefully inspect product's image quality, especially those products claimed to have A+ grade.
2. MONITORS VIDEO ASPECT RATIO
Now, similar to television, monitor screen size also have many types. The regular screen size including 17", 19", 20", 32", 42" and larger screen size. The video aspect ratio includes 16:9, 4:3, or 5:4 etc. Perhaps some users may think the aspect ratio is only related to users' customs. However, similar to security monitor, the front-end security cameras also have fixed aspect ratio. If the video aspect ratio of front-end and back-end equipment is mismatch, image distortion will appear, consequently, impacts the performance of video monitoring. Although there are many kinds of aspect ratio types, 16:9 is the widely used aspect ratio for the most security cameras. Similar to 720p*1080i high definition network cameras, basically adopt 16:9 format. From long-term perspective, 16:9 has the great possibility to become the major aspect ratio in the future. When we choose equipment, 16:9 aspect ratio should be specially noticed.
3 CONSIDER THE IMAGING PERFORMANCE
In our previous buying security camera, we commonly recommend users to inspect the real result before making the decision. It's the same to security monitor. However, comparison is easy, but in real operation and inspection, what should we focus?
4. RESOLUTION
Concerning to the selection of resolution, we still take 16:9 monitor as the example. Today, this wide screen LCD physic resolution is 1368*768. To this parameter, we can use signal generator to input resolution text signal, then inspect the displayed resolution TV lines, hence we can know why the quality complies the requirement. A 1080P monitor can display 1,920 pixels across the width of the screen, and 1,080 pixels from top to bottom. The higher the resolution, the more information can be displayed on the screen. Additionally, we can make the security camera aim at high-speed running subject, so that we can know the security monitor's response speed, check if it will encounter motion blur problem.
5. RESPONSE TIME
In terms of pixel response time, we can check the current average response time. Today, pixel response time becomes the product highlight to more and more monitor manufacturers. During security camera working, if want to achieve ideal video surveillance effect, without 60 frame per second response time is hard to achieve. Well, achieving this speed, the pixel response time should be within 16ms. However, the response time of major monitors basically reach 8ms, therefore can meet the high-speed 125 fps requirement. Actually, to residential and small business users, 12ms or 16ms products are enough. Monitors with a fast 1-millisecond (gray-to-gray) pixel response are very good for gaming, but even monitors with a higher pixel response, like the Acer B276HUL (6 milliseconds, gray-to-gray), can display games without much blurring or ghosting. The fact is, most users won't notice lag, which is the time it takes for the display to react to a command, but hardcore gamer consider this a key factor when choosing a monitor and typically seek out the fastest models available.
6. BRIGHTNESS AND CONTRAST
When we choose the security monitor, we regularly see brightness and contract options. What are these two parameters about? Typically, LCD monitor has higher brightness, the color is more vivid, the real performance is better. For those low brightness products, displayed image will become darker, thereby increasing the fatigue of the user. At present, a regular monitor brightness is approximate 250cd/㎡, too bright and too dark will impact on imaging performance. After discussing the brightness, now we are discussing the contrast, regularly, LCD monitor's contrast is 3000:1, the conventional CRT monitors have lower contrast. However, as the video surveillance monitor, 400:1 is the lowest required level, when contrast is below 300:1, then you can ignore it.
7. VIEWING ANGLE
For conventional CRT monitor you don't need to take visual angle fact. Since LCD monitor uses different imaging technology, screen color will change when users view from different angle. In fast, the viewing angle can be divided into horizontal angle and vertical angle. When choosing a monitor, a wide viewing angle monitor is the best choice. 8 The stability of monitor When it comes to stability, this is the major concern for everyone when choosing a monitor, however, it's also the most frustrating thing. Basically, you can't know the stability when you "see" the product. But you still can inspect some small detailed design to extend the lifespan time, such as the previous mentioned defect parameter, or if utilizes anti-interference product housing, good heat-dissipation design, as well as advanced heat-dissipation fan and temperature control etc. Moreover, the adopted imaging technology can also be used as the reference.
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