Analysis of a TV LCD
I’m often asked what is a TV LCD? LCD stands for Liquid Crystal Diode and examples of tv LCD displays are all around us. From large scale displays hung from tv wall mounts to photo viewers, microwaves, digital clocks and car dashboards, LCD displays are now a integral part of our lives, and it’s hard to imagine a day spent without watching or using one.
The most common type of ‘liquid’ crystal used in LCD TVs is twisted nematic – a naturally twisted crystal that reacts to electric currents by untwisting to various extents according to the voltage being passed through it.
By pressing this crystal between parallel panes of polarized glass, it’s possible to manipulate the intensity of light that passes through it, and change the display from light states (where the crystals are fully twisted) to dark states (where the crystals are fully untwisted), and grey states in-between.
A TV LCD display such as a Samsung LCD TV then, consists of thousands of arrays of tiny crystals called ‘pixels’, that are manipulated together to form images on the screen. The process of manipulating these crystals is called ‘addressing’, where each pixel is individually turned on or off to create a image for the viewer.
The light for the TV LCD is created with an array of florescent bulbs or (more recently) LED’s (light emitting diodes) that emit light through the polarized glass behind the liquid crystal, backlighting the display. As the crystals allow all wavelengths of light to pass through, the full spectrum of colour can be harnessed and manipulated to create the images required.
To display different colours, each pixel is divided into three sub-pixels – red, green and blue – that work together to achieve the hue. With each sub-pixel able to create up to 256 colours, the use of all three sub-pixels means a single pixel can produce up to an amazing 16.8 million colours – amazing!
So why choose a TV LCD?
With each pixel on an LCD display having it’s own transistor electrode, TV LCD’s can feature smooth, wide, saturated and evenly lit images with none of the lines that older projection TV’s used to suffer from, even on a 32 inch lcd tv or larger.
With all that light and so many pixels, it’s no surprise then that flat panel TV LCD displays also tend to be significantly brighter and have higher contrast ratios than the older CRT displays. This means that a TV LCD won’t wash out in brightly lit rooms, glare under direct light, or flicker, which can cause eye strain.
TV LCD’s also support wide viewing angles of up to 160°, allowing the display to be viewed from almost anywhere in the room. They’re also significantly thinner than older projection TV’s, allowing them to be mounted wherever they’re needed using tv wall mounts.
And last but not least, the average lifespan of a tv lcd display is around 60,000 hours – that 2500 days of constant watching or almost 7 years – so find some good lcd tv deals online and get yourself one!
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Simply tv wall mounts is a blog providing a host of information on purchasing, installing and get the most out of your tv. For more information on choosing an led tv, visit LED TV.