Originally uploaded by Razumovics
Maybe I'm thinking about changing TV. In 2013 takes place the "digital switchover", ie different broadcasters stop analog signal issue we used a lifetime and will exclusively digital broadcasting, which is what we know as digital terrestrial television.
Do I have to throw my TV and buy a big screen tv to see the new digital World?
The answer is no. Just buy a Freeview receiver and connect it to the TV tube lifetime be able to use the digital signal.
So why should I buy a whole TV if I can buy just the Freeview receiver?
Obviously you do not need to buy a flat screen TV, but it offers many advantages:-
Nowadays almost all integrated Freeview receiver (also called DVB-T)
- They take up much less space
- They reach much larger formats (up to 100 inches)
- Can be broadcast in high resolution (HD) and full high resolution (Full HD), with a much higher image quality.
- No flicker produced
- The screen is flat, not curved.
- As technology has great potential to evolve significantly and quickly, offering more features at a time
- Consume less than tube TVs.
- Due to their size, also improves the aesthetics.
- The prices are decreasing considerably
What types of flat TVs are there?
The offer is varied, including the following technologies:- TFT LCD (Thin Film Transistor TFT = LCD = Liquid Crystal Display) The liquid crystal is the key to this technology. Used as a light filter, letting through only light needed to create the image you are looking for. The TFT is a component of LCD TVs. Is a matrix that manages the degree of transparency of the glass. It's kind of network switches (one per pixel). In street language used almost interchangeably TFT or LCD stands for identifying this type of flat TVs.
- Plasma or PDP (Plasma Display Panel) A plasma screen comprises a matrix of cells which in turn are composed of three elements (Red, Green and Blue).
The gas, xenon in the plasma state reacts with phosphors in each sub-pixel to produce colored light. Each sub-pixel is individually controlled by a processor.
- OLED (Organic Light Emitting Diode) Organic electroluminescence points are simply placed in a matrix on the screen and the image forming light. They are shorter than the LCD but also consume much less.
- FED (Field Emission Display) and SED (Surface-conduction Electron-emitter Display) These technologies are very similar can be understood as a combination between CRT and LCD. This involves applying miniature cathode ray cell at a flat screen, as if each were a mini TV cell.
- DLP (Digital Light Processing) This is called the technology used in projection TVs and rear projection. Basically a wheel of light emitting primary colors (red, green and blue) and they are redirected to the screen by a system of mirrors (one per pixel). In some models can display up to 35 trillion colors
- LCoS (Liquid Crystal on Silicon) It is very similar to DLP technology and also used in rear projection. The main difference is that instead of using liquid crystal mirrors applied directly to the surface of a silicon chip.
Which is better?
No one that is the best. Each has its advantages and disadvantages. May Be more or less useful life, higher or lower resolution, higher or Lower contrast, higher or lower consumption, greater or lesser cost, Etc. The best in each case is to assess the needs that are to be covered and choose one of these technologies accordingly. You Might not mind paying more for a better contrast ratio, but who cares That its useful life is less and therefore not compensate you buy a Plasma. Yourself. Today, in any case, all the chances are pretty good. The disadvantages of each of the technologies have corrected over time and not be disappointed with any of them. If anything, the LCD may be evolving faster and their prices fall more rapidly than the rest to be the most widespread of all.
How do I decide on a TV then?
The advice is to collect data, the more the merrier. First decide what size screen you need. For example let's say you need a 42 ". Secondly decide the maximum intended spending money and set a margin. Then go to the store and ask what have TVs 42 "not exceeding the maximum price set by you. Surely Will all together, so head over there, have put the same issue on every TV you want to compare and try not to look at the marks but the Screens. It is time to take note. Make A chart on a sheet with each TV model number and go to different Viewing angles and distances to take note of what is best overall in his Opinion, which has better brightness, better contrast, better sound, Higher resolution, better Colors, better reflects what motion pictures, which seems more beautiful ... when done noting that ask the store clerk what you think of each of them and put it on your table. Next, have the technical characteristics of each, and also add them to the table. Finally, repeat the operation in at least 10 stores. You will see the same TV for data vary store to store, it is normal, there are environmental factors that influence the quality of viewing, which will influence their own assessment, employee councils will in many cases some other opinions and will a simple repetition of the technical characteristics. Once all the data collected do half for each feature in each model and then try to make a simple comparison.Note that today's flat-panel televisions have higher resolution than the issuance of individual chains so that in many cases the image will look pixelated, as when we enlarge an image. In the future will increase the quality of emissions and will appreciate the high quality of these devices.
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