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LED Display Modules Works
Aug 04, 2017

LED Display Modules works
(A) the physical properties of liquid crystal
The physical characteristics of the liquid crystal is: when the beam through this layer of liquid crystal, the liquid crystal itself will be arranged to stand or twisted irregularly, so the barrier or the smooth passage of the beam. Most of the liquid crystal belongs to the organic complex, composed of long rods. In the natural state, the long axes of these rodlike molecules are substantially parallel. The liquid crystal into a well-machined slotted plane, liquid crystal molecules will be arranged along the slot, so if those slots are very parallel, the molecules are completely parallel.
(B) the principle of monochrome LED Display Modules
LED Display Modules technology is to pour the liquid crystal between the two columns with a thin groove between the plane. The grooves on the two planes are perpendicular to each other (intersecting 90 degrees). That is, if a plane is arranged in the north-south direction, the molecules on the other plane are arranged in the east-west direction, and the molecules located between the two planes are forced into a 90 degree twist state. As the light along the direction of the arrangement of molecules, so the light through the liquid crystal is also reversed 90 degrees. But when a voltage on the LCD, the molecules will be re-arranged vertically, so that light can go out directly, without any twisting.
The LED Display Modules is dependent on the polarized filter (slice) and the light itself. Natural light is randomly divergent in all directions. Polarization filters are actually a series of increasingly fine parallel lines. These lines form a net that blocks all rays that are not parallel to these lines. Polarization of the filter line is just perpendicular to the first, so it can completely block those already polarized light. Only two lines of the filter are completely parallel, or the light itself has been twisted to match the second polarized filter, and the light is able to penetrate.
LED Display Modules is composed of two mutually perpendicular polarization filter composition, so under normal circumstances should be blocked all attempts to penetrate the light. However, since the two filters are filled with twisted liquid crystals, the light is pierced by the first filter, the liquid crystal molecules will be reversed 90 degrees, and finally from the second filter piercing. On the other hand, if a voltage is added to the liquid crystal, the molecules will be rearranged and completely parallel, so that the light is no longer twisted, so just by the second filter to block. In short, the power will be blocked light, no power is the light emitted.
However, it is possible to change the arrangement of the liquid crystal in the LED Display Modules so that the light is emitted at the time of power up and not being blocked when power is applied. But because the computer screen is almost always lit, so only "power will block the light" program to achieve the most energy-saving purposes.
From the LED Display Modules structure, whether it is a laptop or desktop system, the use of LED Display Moduless are composed of different parts of the layered structure. The LED Display Modules consists of two glass plates each having a thickness of about 1 mm and separated by a uniform interval of 5 μm containing a liquid crystal (LC) material. Since the liquid crystal material itself does not emit light, so on both sides of the display are provided as a light source of the lamp, and in the back of the LCD screen has a backlight (or light plate) and reflective film, the backlight is composed of fluorescent substances Can emit light, its role is to provide a uniform background light source. The light emitted by the backlight plate enters the liquid crystal layer containing thousands of crystal droplets after passing through the first layer of the polarizing filter layer. Crystal droplets in the liquid crystal layer are contained in a small cell structure, one or more cells constitute a pixel on the screen. Between the glass plate and the liquid crystal material is a transparent electrode, the electrode is divided into rows and columns, at the intersection of rows and columns, by changing the voltage to change the liquid crystal rotation state, the role of liquid crystal material similar to a small light valve. The periphery of the liquid crystal material is the control circuit portion and the driving circuit portion. When the electrode in the LED Display Modules generates an electric field, the liquid crystal molecules are distorted, so that the light passing through them is regularly refracted and then filtered through the filter of the second layer on the screen.