LCD liquid crystal display has rich colors and good performance

by:Genyu     2019-11-21
Composition and working principle of Liquid Crystal Display: from the structure of liquid crystal display, whether it is notebook screen or desktop liquid crystal display, the liquid crystal display screen used is a hierarchical structure composed of different parts. The liquid crystal display consists of two plates with a thickness of about 1mm, which are evenly separated by 5um containing liquid crystal material. Because the liquid crystal material itself does not emit light, there is a lamp tube as a light source under the display screen, and there is a backlight panel on the back of the liquid crystal display screen (Or uniform light board) And reflective film, the backlight plate is composed of fluorescent substances, which can emit light, and its function is mainly to provide a uniform backlight source. The light emitted by the backlight plate enters the liquid crystal layer containing thousands of liquid crystal droplets after passing through the first polarization filter layer. Droplets in the liquid crystal layer are contained in a small cell structure, and one or more cells form a pixel on the screen. Between the glass plate and the liquid crystal material is a transparent electrode, which is divided into rows and columns. At the intersection of rows and columns, the optical rotation state of the liquid crystal is changed by changing the voltage, the function of liquid crystal material is similar to that of small light valves. LCD technology is to pour liquid crystal into two planes with fine grooves. The grooves on these two planes are perpendicular to each other (Intersect into 90 degrees). That is to say, if the molecules on one plane are arranged in the north-south direction, the molecules on the other plane are arranged in the east-west direction, while the molecules located between the two planes are forced to enter a 90-degree torsion state. Since the light travels along the direction of the molecules, the light is also twisted 90 degrees when passing through the liquid crystal. When a voltage is applied to the liquid crystal, the liquid crystal molecules will rotate to change the light transmittance, thus realizing multi-gray scale display. LCD is dependent on polarization filter (Film)And the light itself. Natural light is randomly distributed in all directions. The polarization filter is actually a series of parallel lines that are getting thinner and thinner. These lines form a net, blocking all light that is not parallel to these lines. The line of the polarization filter is exactly perpendicular to the first, so it can completely block the polarized light. Only when the lines of the two filters are completely parallel or the light itself has been twisted to match the second polarized filter can the light penetrate.
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