Notebook LCD LCD screens and LED LCD screens are based on the material and workmanship of the notebook LCD screens, and they are widely used on notebook screens.

       The LCD liquid crystal display is an abbreviation of Liquid Crystal Display. The LCD is constructed by placing a liquid crystal cell among two parallel glass substrates, a TFT (thin film transistor) on the lower substrate glass, and a color filter on the upper substrate glass through the TFT. The signal and voltage changes to control the direction of rotation of the liquid crystal molecules, so as to achieve the purpose of controlling whether or not the polarized light of each pixel is emitted or not.

LCD LCD Advantage

       Display panel is thin, electromagnetic radiation is small, passive display type, no glare, contribute to eye health, display information is large, easy to color, long life (This device has almost no deterioration problem, so the life is extremely long, but the LCD backlight Limited life).

Disadvantages of LCD screen

       Does not shine by itself, depending on the backlight display, the price is expensive

       The LED LCD is an acronym for Light Emitting Diode. It means a light emitting diode, a solid state semiconductor device that converts electrical energy into visible light. It can directly convert electricity into light.

The advantages of LED LCD screen

       1. Actually, the biggest advantage of liquid crystal displays compared with traditional CRTs is power consumption and volume. For traditional CRTs, their power consumption is almost 80W, and most of the power consumption of LCDs is about 40W. , LCD can be described as an obvious advantage in energy saving.

       2, compared with the traditional CRT liquid crystal in the environmental performance performance, this is because the liquid crystal display does not exist as high-voltage components like the CRT, so it will not appear due to high pressure caused by x-rays over the situation, so its radiation The index is generally lower than the CRT.

       3. Because the CRT display is controlled by the electromagnetic field generated by the deflection yoke to control the electron beam, and because the electron beam can not be absolutely positioned on the screen, the CRT display often has different degrees of geometric distortion and linear distortion. The liquid crystal display does not suffer from any geometric distortion and linear distortion due to its principle problem, which is also a great advantage.

       4. The liquid crystal display has a large viewing area: When the general CRT monitor is displaying, there will be some black edges around the display screen to take up the visible image; and the liquid crystal display screen will not have these problems, and is completely visible. For example, a 13-inch LCD is equivalent to a 15-inch CRT monitor.

       5,. High-definition picture quality, the general LCD monitor resolution can reach above 720 lines, while the CRT monitor is much lower

LED LCD screen disadvantages

       1. The visual deflection angle is too small. The liquid crystal display has a limited viewing angle of view, and is often viewed only from the front. Large brightness and color distortion appear from the side. Nowadays, the viewing angle of liquid crystal displays in the market is generally around 140 degrees, which is enough for personal use. However, if several people watch at the same time, the problem of distortion is revealed.

       2, easy to produce image tailing phenomenon. Fast enough response time to ensure the continuity of the picture. This is very important when playing games and watching fast-moving images. At present, the general liquid crystal display on the market has a great breakthrough in response time compared with before, generally about 40ms. However, the response time of individual LCD products is not short enough, resulting in image smearing when moving pictures are displayed.

       3, LCD brightness and contrast is not very good. Since the liquid crystal molecules cannot emit light by themselves, the liquid crystal display needs to rely on external light sources to assist light emission. In general, 140 lumens per square meter is enough. Some manufacturers still have gaps between the parameter standards and the actual standards.

       4, LCD "bad point" problem. The material of the liquid crystal display screen is generally glass, and it is very easy to break. In addition, each pixel is very small, often causing the phenomenon that individual pixels are broken, commonly known as "bad point". This is impossible to repair, and only the entire display is replaced. Screen, and the replacement price is often very expensive.

       5, limited life. LCDs are not as durable as ordinary monitors. It is generally considered that two to three years are normal life spans, and therefore it is necessary to consider whether or not it is willing to replace the monitor again after two or three years of purchase.