Liquid-crystal display, which is a graphic ultra-thin display device, which is composed of a certain number of colored or black-and-white pixels placed in a light source or reflected in front of a reflection. Liquid crystal display power consumption is very low, so the engineers favour, suitable for use of battery electronic equipment. Its main principle is to stimulate liquid crystal molecule to generate point, line, and the surface to match the back lamp tube.
Working principle of liquid crystal display, liquid crystal is a kind of special material between solid and liquid, it is an organic compound, normal is liquid, but its molecular arrangement is very rules and solid crystals, so named liquid crystal, it's another special qualities is that if applying an electric field to the LCD, can change its molecular arrangement, then if you give it with polarized light, it will have a stop light through a role (without applying an electric field, the light can be smoothly through), if combined with color filters, change to the LCD voltage size, can change a color how much the amount of light, also can change that image to light transmittance of voltage at the ends of the LCD can change it, but in practice it must be with polarizing film)
All along, the pursuit of more perfect visual enjoyment is the goal of our desktop display devices, reviewed the development of display technology, we can readily find it is all about the same theme - "the pursuit of the human eye visual comfort of a better"!
As a new product that has sprung up in recent years, liquid crystal displays have replaced clunky CRT displays as a mainstream display device. However, the development of liquid crystal display is not as smooth as we think. Below, we review the hard and winding road of LCD development with new and old users.
Early development of LCD (1986~2001) - early in the immature technology of high cost suppression, LCD was mainly used in electronic watches, calculators and other fields. The LCD is called Liquid Crystal Display, which is called Liquid Crystal Display, which is called Liquid Crystal Display.
A liquid crystal is a substance that is almost completely transparent. Its molecular arrangement determines the path of light penetrating the liquid crystal. By the 1960s, it was discovered that charging liquid crystals would change its molecular arrangement, resulting in distorted or refraction of light, which led to the invention of liquid crystal display devices.
The world's first liquid crystal display device appeared in the early 1970s, known as tn-lcd (twisted into a column) liquid crystal display. Despite its monochrome display, it has been popularized in fields such as electronic watches and calculators.
Liquid crystal is a kind of organic compounds, so under normal temperature conditions, showing both the fluidity of liquid crystal optical anisotropy, which is called "liquid crystal". In the electric field, magnetic field, under the influence of external conditions, such as temperature, stress, prone to rearrange its molecules, and the various optical properties changes of liquid crystal, liquid crystal the anisotropy and molecular arrangement easy under the control of the applied electric field, magnetic field. The physical basis of using the liquid crystal, namely liquid crystal "electro optical effect", realize optical signal modulation, thus made of liquid crystal display device. Under different current electric fields, the liquid crystal molecules will do arrange rules rotated 90 degrees, producing the difference of light transmittance, so the power ON/OFF under the difference between light and shade, each pixel according to the principle of control, can form the image.
The physical property of the liquid crystal is: when the power is connected, it can be arranged in order to make the light easy to pass; Arrange chaos when not energized to prevent light passing. Let the liquid crystal block or let light penetrate. Technically, the liquid crystal panel contains two fairly fine, non-sodium glass materials, called Substrates, with a layer of liquid crystals sandwiched between them. When the light beam passes through this layer of liquid crystal, the liquid crystal itself will be lined up or twisted in an irregular shape, thus blocking or allowing the beam to pass smoothly. Most liquid crystals are organic compounds composed of long-stick molecules. In a state of nature, the long shafts of these molecules are roughly parallel. The liquid crystal is poured into a well-processed grooved plane, and the liquid crystal molecules are arranged along the slot, so if the slots are very parallel, the molecules are completely parallel.
The composition and working principle of liquid crystal display: from the structure of LCD, whether laptop screen or desktop LCD, using the liquid crystal display screen is made up of different parts of layered structure. The liquid crystal display is composed of two boards, which are about 1mm thick, which is separated by a 5um uniform separation of liquid crystal materials. Because liquid crystal material itself does not shine, so in the screen below have tubes, as the light source in the LCD screen on the back has a back plate (or well plate) and the reflective film, back plate is composed of fluorescent material, can shoot the light, the main role is to provide uniform back light