To know the difference between the oled screen and the lcd screen, we need to explain from the operating principle, so let's look at the operating principles of both. Lcd and oled are two completely different display technologies, and are widely used in the fields of smart phones and flat-screen televisions. In addition, old technologies such as plasma have also existed in the field of television, but are now disappearing. Most users can only choose from these two display panel products, and if you don't know how to choose, this article will tell you some basic knowledge and tell you the difference between lcd and oled, and tell you how to pursue a balance in the middle of your needs and budget. The lcd screen lcd is called the liquid crystal display (liquid crystal display) in the whole process, and various colors are created based on the white light passing through the color filter. The white light will form the basic color, such as red, green and blue after passing, and control the over-index of each pixel by current, so as to control the color of the pixel. In the lcd screen, it's a very difficult thing to be completely shielded from white light, and there is always or much of the phenomenon of light leakage, which is why the real black cannot be present on most of the night-view display. The passive and active matrix lcd (lcd) display was used in the 1980s and used on the "portable computer" for the first time. These screens have a "matrix"-arranged pixel and are divided into active and passive matrices. The technology of the active matrix is more advanced and allows for more detailed control and has a faster switching speed than the passive matrix. Active matrix technology is first introduced using the tft's edge-matrix screen, but more variety of technology has emerged, but basically the same principle of work, and the cost is decreasing. All lcd screens of lcd backlights require some form of white backlights, and as time goes on, the backlight technology is progressing. And the purpose of the backlight is that the brightness is higher, the illumination is more uniform, and the volume of the display screen is smaller, thinner and lighter. The lcd screen initially uses the ccfl backlight and has now been changed to a led backlight. In addition, some liquid crystal displays have not only used white backlights, or even a combination of led and white light of a particular color to achieve some more difficult goals. While the backlight is from the liquid crystal layer, most of the led backlight sources come from the edge of the screen, typically at the border, and such a design can make the screen thinner and flatter. While the products of the television class are typically not so high for the thickness requirements, the overall uniform backlight can be used, and such light may be more uniform and may also be adjusted for local backlight. The full name of lcd ips and pls ips is in-plane switching (also called super-ft), a variant of the lcd screen. Ips can provide better color accuracy and a broader perspective. Whereas a conventional lcd display typically displays the best fresh fruit only in front of the screen. Ips can fully replicate the color effect in a range of 178 degrees and will not be affected. And that's why most of the touch devices are starting to use the ips display. That's right. The traditional lcd screen, when pressed by a finger, will have a strange effect and believe that everyone has a similar experience. At the same time, the ips technology itself has more improved versions, including super-ips (s-ips), advanced super ips (as-ips), and ips-pro, etc., though not all of the ips panels have the best results, but overall ips is better than the traditional lcd panel. Pls-line switching is also a technology similar to ips, which is a samsung's patent. Samsung said the screen had better brightness and more efficient production costs, but it is not yet possible, as the absolute leader of the ips display currently on the market is lg.