Liquid crystal display high definition television (LCD HDTV) refers to those television sets that use LCD technology in production of images. They are very different from the traditional cathode ray tubes because they are thinner and much lighter than CRT TVs. LCD technology is one of the latest technologies in TV production. Since 2007, LCD HDTVs has taken the sales of CRT televisions, plasma televisions and projection televisions. They are the most produced and most sold large screen TVs in the world.
The LCD technology is more complicated than the CRT technology. These LCD HDTVs produce images by selectively filtering white light to produce a black and/or colored image. The back of the screen has a series of cold cathode fluorescent lamps that produce the white light. However, some LCDs have shutters that are arranged in grids which colored filters remove primary colors from the white light. These pairs of filters are the ones that form small sub-pixels that cannot be viewed even from a small distance. When the color shots from the sub-pixels blend together, they now produce a pixel. Color shades can be varied by controlling the light intensity through the sub pixels.
Unlike in CRTs where cathode rays are hit the fluorescent screen glow, LCDs have liquid crystals responsible for glowing. The crystals have a wide range of rod shaped polymers forming into thin layers, a peculiar alignment not experienced in normal liquids. Polarizer plates are set a right angle to prevent light from passing. Light then must flow out of the rear polarizer and in so doing; it follows the liquid crystals twist leading to the glowing effect.
LCD HDTVs have a higher resolution that of the standard definition TVs. They are usually transmitted in various formats depending on the number of megapixels per frame. High definition TVs provides close to five times the number of megapixels a standard definition TV would provide increasing the quality of the image.
Advantages Of LCD HDTV
You might be asking yourself what makes the LCD HDTV so special. Indeed they are special for a number of reasons. LCD screens are much thinner and lighter than CRT screens and projector TVs. They can comfortably fit in a smaller room without having to mount special brackets for them like for the old fashioned CRTs. They therefore save on space. They have a bright color rendition and due to the high definition properties, the image quality is superb.
Blending high definition technology with liquid crystal display has improved the programming and viewing capabilities. Signals sent to LCD HDTV sets are dense in audio and visual information. They embrace digital technology and can carry up to ten times the screen resolution compared to the old analogue signals. LCD HDTV sets have tuners that can be used to connect companies that do high definition TV programming. You therefore need to a get a LCD HDTV set because the technology involved and image quality are not something to miss.