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Flat LCD TV

 

 

 

A liquid crystal display or LCD (liquid crystal display) is a thin, flat screen that consists of a number of color or monochrome pixels arranged in front of a light source or reflector. -It consists of two sheets of polarized transparent material attached, one with a special polymer coating that contains liquid crystals. The electric current passes through each of the crystals, which interpret the information from the broadcast signal to allow or prevent that the light which passes through them creates an image.

 

 

 

 

 

 

 

 

 

 

 

In color LCDs each individual pixel is divided into three cells or subpixels, which are red, green and blue, respectively, by increasing filters (pigment filters, dye filters and metal oxide filters). Each subpixel can be independently controlled to produce thousands or millions of possible colors for each pixel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On high-resolution color devices such as modern LCD monitors and televisions use an active matrix structure. A matrix of thin-film transistors (TFTs) is added to the polarization and color filters. Each pixel has its own dedicated transistor, allowing each column line to access to one pixel. When a row line is activated, all column lines are connected to a row of pixels and the correct voltage is driven all the column lines. When the row line is deactivated, the next row line is activated. All the row lines are sequentially activated during an update operation.

 

1972:The first active matrix liquid crystal screen was produced in the United States by T. Peter Brody.

 

When you try to run LCD panels at non-native resolutions, usually the results in the panel on the image scale introduce image blurring or blockages and, generally, it is susceptible to various kinds of HDTV blurring.

 

LCDs tend to have slower response times than their corresponding plasma and CRT

 

LCD panels tend to have a limited viewing angle.