Overview of LCD (liquid crystal, liquid crystal)

LCD (Liquid Crystal, referred to as LC) is a polymer material, because of its unique physical, chemical, optical properties, the middle of the 20th century began to be widely used in thin-and-light display technology.

People familiar with the material state (or phase) for the gas, liquid, solid, the more unfamiliar the plasma and LCD (Liquid Crystal, referred to as LC). Liquid crystal phase to form a special combination of elements will have before they can be mobile and have the optical properties of crystal. The definition of liquid crystal, it is now relaxed and include a certain temperature range that can be a liquid crystal phase is, at a relatively low crystallization temperature of the material as normal. The composition of the liquid crystal material is an organic compound, it is posed as the central carbon compounds. At the same time with two liquid crystal material is a combination of intermolecular forces, and their special optical properties, but also sensitive to electromagnetic fields, it is highly practical value.

Liquid crystal display material is the most common uses of electronic watches and calculators display board will show why there? This shows that the original liquid photovoltaic materials, the use of liquid crystal electro-optic effect of the electrical signal into characters, images can be seen the signal. LCD under normal circumstances, the order is the order of its elements, it is crystal clear, if coupled with direct current electric field, the molecular arrangement was disrupted, some liquid crystal becomes opaque, the color deepened, and thus can display digital and images. Liquid crystal electro-optical effect is that it refers to the interference, scattering, diffraction, optical activity, absorption by the electric field modulation of the optical phenomena.

Some organic compounds and polymers, to a certain temperature or the concentration of the solution, both the mobility of the liquid, but also has crystal anisotropy, which is LCD. LCD photoelectric effect controlled by the temperature of liquid crystal known as thermotropic liquid crystal; lyotropic liquid crystal is controlled by concentration. LCD display is generally low-molecular-weight thermotropic liquid crystal.

According to the characteristics of liquid crystal will change, people use it to indicate temperature, gas, such as the police. For example, the liquid crystal can change with temperature, so that the color from red to green, and blue. This will indicate the temperature of a certain experiment. LCD when hydrogen chloride, hydrocyanic acid, such as toxic gases, will change color. In the chemical plant, it is the liquid film hanging on the wall, if there is trace gas escape, LCD color, it hastened to remind people to check, fill gaps.

Many types of liquid crystal, liquid crystal molecules are usually the center of the bridge bond and classify the characteristics of ring. Has been synthesized by more than 10,000 kinds of liquid crystal materials, commonly used in liquid crystal display in which there are thousands of materials, mainly LCD biphenyl, phenyl cyclohexane, such as liquid crystal and liquid crystal esters. Liquid crystal display material has obvious advantages: low-voltage, small power consumption, high reliability and informative display, color display, no flicker, no harm to humans, the production process automation, low-cost and can be made into a variety of specifications and types of liquid crystal displays, and so easy to carry. As a result of these advantages. Liquid crystal materials with computer terminals and television, etc. can greatly reduce the volume. LCD imaging technology to show the product mix had a profound impact, and promote the micro-electronics technology and electro-optical development of information technology.