How different types of TVs work, how many types of flat screen TVs are there?
There are four different kinds of TV screens available today, these are 'CRT' or 'Cathode Ray Tube'; 'LCD' or Liquid Crystal Display (LED TV is an LCD TV with LED backlight); 'Plasma' TV and the newest 'OLED' or 'Organic Light Emitting Diode' TV. These different types of TVs are explained below.
How a cathode-ray tube TV works
The Cathode Ray Tube (CRT) TV or simply Tube TVs was the first generation of TVs. The world's first TV transmissions were carried out in USA in 1936 and Tube TVs were used to watch those early TV programs. It is still possible to buy Tube TVs, but most of the big manufacturers of TVs have stopped producing CRT tube TVs. Here is a picture of the old Tube TVs which many kids now may not even remember ever having seen one.
The CRT tube TV disadvantages were that tube TVs larger than 29 inch was not available and they were bulky and heavy. Watching a movie on the small 4:3 screens of a tube television is a far cry from watching on a modern wide 16:9 flat screen TV
The first TVs to be used were all Tube TVs. In 1934 'Telefunken', a German Company was the first to produce commercially available Televisions using Cathode Ray Tubes. These were black and white TVs, color Tube TVs were commercially available only from early 1950s.
Different types of TV with flat screen
Modern TVs have wide flat screens with 16:9 aspect ratio. There are 3 types of flat screen TVs: LCD / LED TVs, Plasma TVs and OLED TVs. How these flat screen TVs work are explained below
How LCD LED TV works
LCD TVs are Flat Screen TV’s making use of LCD (Liquid Crystal Display) screens, which have millions of liquid crystals, sandwiched between two glass panels. This assembly is known as the LCD panel. When the liquid crystal elements in the LCD panel are charged with electricity using individual transistors for each pixel, the LCD crystals allow a certain amount of light to pass through the LCD screen, the backlight being produced by either of two sources, by a CCFL (Cold Cathode Fluorescent light) in an LCD TV or by LED (light emitting diode) bulbs in an LED TV.
LCD and LED TV difference
In both an LCD and LED TV, the main screen on which the picture is formed is an LCD screen. What makes an LCD TV and an LED TV different is the backlighting bulbs in the TV. In an LCD TV the backlight bulbs are CCFL type (Cold Cathode Fluorescent Light) and in an LED TV, the backlight is from LED bulbs (Light Emitting Diode). So the flat screen of both an LCD and LED TV is the same, it is only the type of projection lamps behind the LCD screen what makes an LED TV and LCD TV different. ........More from our dedicated page on LCD LED TV
What is Plasma TV and how it works
Plasma and LED TVs are both flat screen TVs, but they are very different and work with totally different technologies. The Plasma TV pixels are made up of gas filled cells, each containing a mixture of rare gases (neon and xenon). These cells glow when charged with electric voltages to produce different colors. Each of the plasma TV pixels light up individually to varying colors depending on the electric charge applied to them.
Since Plasma TV pixels produce their own light and colors without depending on any backlight source, the picture of the plasma TV is superior to that produced by an LCD LED TV. Advantages of Plasma TVs over LED TVs are better picture quality with higher contrast ratio, better Viewing angle, no blurring of fast moving objects like a racing car and is usually cheaper than an LED TV. The disadvantages of Plasma TV Vs. LED TV are that Plasma TV picture is dim and cannot be watched in brightly lit rooms, Plasma TV sets are heavier, uses more electricity and have the Screen 'Burn-in' problem. ....... More in our page on Plasma TV
How does OLED TV work?
OLED stand for 'Organic Light Emitting Diode' and is a new type of TV technology that is similar to Plasma TVs. Even though OLED and LED differ only by a single letter, the difference between LED and OLED TV technology is completely different. OLED TVs are like a Plasma TV with OLED TV pixels producing their own light and colors without depending on any backlight source.
Just like a Plasma TV the OLED pixels in the TV are self-illuminating and thus has all the advantages of what the Plasma TVs have. But unlike Plasma TV, OLED TVs are very bright and can be viewed in bright ambient lighting. OLED TVs are less likely to suffer from the problem of burn-in which killed Plasma TV. OLED TV manufacturers have high priority in preventing any burn-in scare for OLED TVs and thus you can be sure that new OLED TVs will never have burn-in problems. .......More from our dedicated page on OLED TV
Curved TVs, what is a curved TV for
The latest trends in TV sets are to have Curved TVs. The main manufacturers of Curved TV are LG and Samsung. LG has mainly OLED Curved TVs whereas Samsung produces LED Curved TVs. According to Manufacturers of Curved TVs they claim that what curved TVs are for are because of the many benefits with curved TVs. .....More from our dedicated page on Curved TV
What is IPS panel in TV
IPS stands for 'In Plane Switching'. IPS LED TV panel screens are now considered the top of the range in LED TVs. The LCD screen in TVs are mainly of two types: In-Plane Switching (IPS) and Twisted Nematic (TN) type. IPS is the superior technology and the benefits of IPS panels in LED TVs are that it gives much wider viewing angles and much better color to the TV picture. Contrast ratios were not so good in the earlier IPS panel TVs, but now with the newer versions of Super IPS screens, the picture quality and contrast ratio of IPS LED TVs are superior to ordinary LED TVs.