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| TV Technology - LCD Vs LED Vs 3D |
If you are not clued-up on the modern TV technologies, it can be overwhelming when trying to understand, and settle from, all the choices out there. Which is best for what you are looking for in a TVall LCD, LED or 3D? If only the acknowledge was so simple! Unfortunately there are many types of each of the above mentioned categories which means a long-winded comparison with many headings and sub-headings is distinct to follow, but is that any more excellent than merely reading the specs (that you hardly understand) of different models you are alive to in? Probably not! So let us try simplifying the comparison of these technologies for those of us who are not technology gurus and purely want some basic, solid advice in our accelerate in shopping for our perfect TV.
LCD TVs
LCD TVs are television sets that exhaust Liquid Crystal show technology to form images. This energy efficient technology makes spend of liquid-crystal-filled cells that are placed between two sheets of glass and a fluorescent backlight. The light is shone onto thin film transistors that allow varying amounts of light to pass through the liquid-crystal-filled cells. The liquid crystals are light-sensitive -- the more light they receive, the darker they become. Images are then displayed on the hide in monochrome or colour by means of the colour filters that receive the light intensity from the liquid crystals.
Pros:
- Thin, light available in astronomical sizes.• Energy efficient.• Largely produced and available.
Cons:
- Lower incompatibility ratio -- less detail in gloomy areas of characterize.
LED TVs
LED TVs are technically a member of the LCD TV family. The exhibit hide on a LED is a liquid crystal expose the same as it is on any other LCD TV. The main disagreement between the two lies within the different backlighting techniques which may change the relate quality characteristics dramatically.
Where LCD TVs expend some produce of fluorescent lighting, LED TVs utilize Light Emitting Diodes to light the LCD panel. objective as there are different styles of fluorescent lights in faded LCD TVs, there are also different styles of LED backlighting. In some LED TVs there is a panel of LED lights late the LCD panel. These LEDs are tri-coloured and can be controlled in banks for an execute called "local dimming". This allows darker areas of the record to have the backlighting dimmed gradual them resulting in better dissimilarity and murky levels. Other LED TVs are functionally similar to passe LCD TVs. In these TVs, the LED lights are surrounding the edge of the panel, allowing for a very slim depth but without the ability to do local dimming.
Pros:
- Thin, light available in gigantic sizes.• Higher dissimilarity ratio -- wonderful detail in characterize.
- Tri-coloured LEDs accomplish for more realistic colours on cover.• 'Edge-surrounding' LED TVs consume less energy than LCD TVs.
Cons:
- Expensive.
- 'Local-dimming' LED TVs consume more energy than LCD TVs.
3D TVs
A 3D TV is a television situation that employs techniques of 3D presentation. To understand how we scrutinize a 3D image, we must understand that our eyes are two separate lenses that register two differently-angled images of an object which are sent to the brain, attach together and made into one three-dimensional relate in your mind. Making screens note 3D images is based on a similar mechanism, but is divided into two categories -- Stereoscopic TVs (which require special glasses to spy 3D images) and Autostereoscopic TVs (which appear 3D without special accessories) .
Stereoscopic TVs require the expend of either shutter or polarized glasses. Both kinds of glasses have the same main expend -- they employ the lenses to exhibit each notice a different image which are then processed by the brain to develop one three-dimensional image in your mind.
Autostereoscopic TVs rely on either lenticular lenses or parallax barrier. Lenticular lenses are slight cylindrical plastic lenses that are pasted on a transparent sheet, which is then stuck on the exhibit surface of the LCD shroud. These lenses magnify the images on the cover and when looking at the original cylindrical images, each seek sees different 2D images which are combined by the brain to obtain one 3D image. Parallax barrier is a beautiful grating of liquid crystal placed in front of the camouflage, with slits in it that correspond to definite columns of pixels of the thin film transistor mask. These deliberately placed slits lisp light from each image slightly differently to each contemplate, again creating a 3D image in the brain.
Pros:
- High refresh rates obtain for composed, rich viewing.• Autostereoscopic TVs allow the parallax barrier to be turned on/off -- 3D and 2D viewing in one.
Cons:
- Picture seems darker due to less light reaching eyes because of glasses.• Glasses are inconvenient and win away the simplicity of watching TV.• Autostereoscopic TVs have a viewing 'sweet spot' and the recount will be distorted if the viewer sways from this region.• Noted health risks; especially in children, pregnant women and the elderly.
So where does this leave you, the consumer, in your decision in buying a television? This is impartial a open to the process. There are obviously more aspects to contemplate when comparing TV technologies such as; functional considerations, response time, refresh rate, longevity and cost of specific models you are keen in. But at least now you can open on your informed expedition!
Labels:
3D TV,
LCD TV,
LED TV
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