LCD TV: Best to Watch

 LCD is all about flat screen TV technology. LCD technology has penetrated our daily lives in everyday objects such as wristwatches, mobile phones, calculators, computer screens, and high-definition televisions. Usage is increasing rapidly, and LCD TV sales are expected to exceed 4 million in the United States alone.

There are some clear advantages to LCD panels over other types of display technologies. They are thinner and only 3.5 inches deep. It's also lighter and, best of all, consumes less power – only about 60% of the power consumed by plasma screens. LCD TVs do not emit harmful electromagnetic waves.

Of course, there are drawbacks: the viewing angle is restricted, the contrast ratio is limited, and the response time of the screen can be a cause for concern. The biggest frown of all is the price. Although it is declining, it is still much taller than its plasma counterpart.

LCD screens consist mainly of sheets of polarized glass panels, two in number. A liquid crystalline solution is placed between them. These liquid crystals are so specific that they act like blinds that open or close the entrance of light as needed depending on the flow of electrical current. This current passing through the liquid crystals is regulated by the voltage applied between the glass plates through the transparent electrodes. These form a grid with rows on one side of the canvas and columns on the other side that represent the pixels or elements of the image.

What are these liquid crystals? Matter can be found in three states: solid, liquid and gas. However, there are substances that exist in a state that is neither liquid nor solid at any given time. The behavior of these molecules is also strange. They maintain their orientation like those of a solid, yet they move into different positions like the molecules of a liquid. Therefore, these liquid crystals can be described as neither solid nor liquid, although they have a higher affinity for the latter, the liquid state.

There are different types of liquid crystals and each has its own distinct characteristics. Those used in LCD panels are known as filament phase liquid crystals. The molecules are arranged in a certain way that has a distinct pattern.

LCD display systems are of two types: passive and active matrix. The first one is more complex, it produces the best images, so the price also goes up. During the manufacturing stage, defective pixels are a serious problem. Countless control transistors on the glass substrate are required to control each sub-pixel. A typical widescreen panel will require 3.1 million transistors. A defective transistor cannot be replaced and is known as a dead or stuck pixel. If one is permanently off, a black dot will appear and if it is on, a white dot will appear. If it exceeds a certain number, the entire unit will have to be scrapped.

In the early 2000s, flat panel LCD monitors took over the TV market from typical CRTs. The basis of the technology is based on the properties of polarized light. A thin semi-liquid crystal gel trapped between two thin polarized plates is divided into pixels

There is a frantic activity of overcoming technological difficulties so that the group is accessible to all. Therefore, an affordable LCD TV must make headlines to be successful.