Before buying a monitor, many people will learn more about the performance parameters of the display, such as display area, resolution, dot pitch, color depth, etc. However, what are the functions of these parameters? What is the display effect on the display? Impact? Because this article focuses on the display area, resolution, and the effect of dot pitch on the display, these three parameters are mainly introduced. At the same time, the main content of this paper is only suitable for LCD displays. Before the introduction, let me first talk about a very real problem. I bought a 22-inch widescreen LCD monitor two days ago. After trying out the new monitor, my father was puzzled. Why is the size of the monitor getting bigger and the displayed text is smaller? Unlike the TV, the larger the size, the bigger the content displayed? In fact, for many newcomers, these problems It is very common. This starts with the resolution and dot pitch of the display. From the working principle of the display, we can know that the display is composed of many small dots. These smallest points are what we often say "pixels". For example, for a display with a resolution of 800 × 600, this means that the display is composed of 800 pixels in the horizontal direction and 600 pixels in the vertical direction, then there are 800 & times on the entire display; 600 = 480000 pixels. For the oldest analog CRT TVs, no matter how large the TV is, the resolution will generally not exceed 300 lines. That is to say, on analog TVs, the number of vertical pixels is generally less than 300. Moreover, since the resolution of the television signal is usually fixed, the resolution of the television does not increase as the screen size increases (the increase is only the size of each pixel, which can be understood as the dot pitch). So when watching TV, we will find that the same video signal, on the TV with the larger screen, will display more content, but the more unclear. Large-screen TVs tend to look better from a distance. Computer monitors are different, and as screen sizes increase, resolution tends to increase (the change in dot pitch is small). So on a computer monitor, the display looks almost the same regardless of the size of the screen. However, this has a problem because the picture of the LCD display is composed of many pixels, so the smaller the pixel point (pitch), the finer the display result. However, too small a pixel will cause the text content to be as small as the text content. At the same time, the smaller the pixel point, the higher the manufacturing process requirements for the LCD panel, and the more expensive the product. So how do you choose between dot pitch, resolution, size, and cost? Computer LCD monitors that are common on the market today are 19-inch, 19-inch widescreen, 22-inch, and 24-inch (almost all widescreens larger than 19 inches). The relationship between size and dot pitch and resolution is shown in the table below. Size Resolution Point distance 19 inch 1280× 1024 0.294mm 19 inch widescreen 1440× 900 0.285mm 22 inch 1680× 1050 0.282mm 24 inch 1920× 1200 0.270mm The contrast from these sizes corresponds to the feeling of most people on these monitors. . At the default resolution, the text displayed on the 19-inch display is relatively large, but the content of the picture is not delicate enough. It is “rough”; the picture displayed on the 24-inch display is very delicate, but the text content is too small; 19-inch widescreen and 22-inch The display is in a position to compare "compromise”. Because of this, 22-inch has been used by many people as the "golden size" of LCD displays. The hardware specifications of the display are complex, but we only need to understand so much. Let's discuss together below, how to make full use of the LCD display that has been bought back.