What is an LCD TV

An LCD TV is a type of flat screen TV that uses LCD technology (Liquid Crystal Display, Liquid Crystal Display), thus generating the images using a liquid crystal display. Along with the plasma TV, LCD TV television has virtually displaced the CRT cathode ray tubes due to the small thickness, weight and small volume, low consumption, high definition and widescreen format, although image quality and speed of response below the CRT.

Features

Currently the flat screen TV, whether LCD or plasma TV, has virtually displaced the CRT TV market to cathode ray tubes due to its low thickness, weight and small volume, low consumption, high image resolution and less damage to the view, despite a reduction in image quality and speed of response to CRT.

The LCD TV uses an active matrix structure TFT (Thin-Film Transistor, Thin Film Transistor), so this type of TV is also commonly referred TFT-LCD TV, LCD TV TFT or TFT.

The LCD TV screen is made of two layers of tinted glass that lie between the pixels formed by liquid crystal and divided into three sub-pixels red, green and blue color of the pixel generated. Behind the pixel is set the backlight or fixed light source, which in the conventional LCD televisions are cold cathode fluorescent lamps (CCFL), while the so-called organic LED TV are diodes.

Here are the main characteristics of an LCD TV:

Weight and dimensions: the LCD TV is very light and flat, with a thickness of less than 10 cm. High definition: most can receive HD signal HD Ready or Full HD. Form factor: the most common aspect ratio on the LCD TV is 16:9 widescreen, unlike the 4:3 ratio of the CRT. Screen size LCD TV can be found from 15 to 60 inches diagonal. Image quality: the refresh rate of the image, the viewing angle, brightness and delay of an LCD TV provides high image quality. Connections: LCD TV usually has all kinds of connections, both digital (HDMI, DVI) and analog (Scart, composite video, S-Video, VGA).

Drawbacks

As main drawbacks of LCD TV we can cite:

High price. An LCD TV has a native resolution provides a result in optimal image losing quality when working in another resolution. The image quality, contrast and color gamut is not as good as on a CRT. The LCD TV usually has a limited viewing angle. They may have defective transistors that generate pixels stuck (permanently lit), dead (permanently off) or weak (less light than the rest). An LCD TV with slow response times can lead to ghost images when images load quickly.

Source: LCD TV