The working principle and development technology of LCD monochrome LCD screen are introduced

February 4, 2017

1: liquid crystal technology is the liquid crystal is poured between two planes, and lined with fine trough. The grooves in the two planes are perpendicular to each other. If the molecules on one plane are aligned north-south and the molecules on the other plane are aligned east-west, the molecules between the two planes are forced into a 90-degree twist. Light travels in the direction in which the molecules align, so when light passes through the liquid crystal, it too is distorted by 90 degrees. But when a voltage is applied to the liquid crystal, the molecules align vertically so that light can be directed straight out without any distortion.

2: LCDS rely heavily on polarized filters and light itself. Natural light diffuses randomly in all directions. Polarization filters are actually parallel lines. These parallel lines form a network, and the lines of the polarized filter are just perpendicular to the first one, so it can completely block polarized light. Light can only penetrate if the lines of the two filters are perfectly parallel, or if the light itself is distorted to match a second polarized light plate.

3: from the perspective of the working principle of the LCD display, whether it is a laptop or desktop system, the LCD is composed of different parts of the layered structure. LCD displays consist of two glass panels about 1 mm thick separated by a material containing liquid crystals. Since the liquid crystal material does not emit light, the display screen has tubes on both sides as a light source. However, on the back of the LCD screen, there are reflective films and backlight plates. Provides background light. The light from the backlight passes through the first polarization filter and enters the liquid crystal layer of the crystal. The crystals in the liquid crystal layer are contained in small cell structures, one or more of which form pixels on the screen. A transparent electrode is arranged between the glass plate and the liquid crystal material. Electrodes are divided into columns and rows. The optical rotation state of the liquid crystal is changed by changing the voltage at the intersection of the column and row. Liquid crystal materials function like small light valves. The periphery of the liquid crystal material is the control circuit and the driving part. When the electrodes on the LCD generate an electric field, the molecules of the liquid crystal distort, refracting the light passing through the LCD, which is then filtered through a second filter and displayed on the LCD.