Benefits and Defects of LCD monitors

LCD

The LCD TV is not limited only to a finer and more TV picture. She has other advantages and disadvantages compared to conventional TV, also known as tube. For it is better to analyze these points and then choose the best type of TV.

With the falling prices of LCD TVs in recent years, the sale of this TV model has grown tremendously. To get an idea, according to the Folha de São Paulo, in 2008 approximately 102.2 million units was sold worldwide. Because of this, the LCD TV has become a major consumer of Brazilian dreams.
New LCD Monitor
Photo Credit: Steve
Advantages:

The LCD TV has a better image resolution than conventional televisions, this because while it has 1080 lines (with FULL HD), a conventional TV usually has only 480 lines. For this reason the LCD provides a larger image and more details depending logically the transmitting signal source (BluRay, digital broadcast channels, etc.).

And for those who do not have much space in the room, the LCD becomes a more favorable option for being thin and having a lower weight, giving up the option to be wall mounted without the use of pallets or shelves. And because of the backlight, the LCD TV is ideal for any environment. Are also more economical because they use less energy than a conventional TV proportional size and emit less radiation than conventional TVs, less tiring sight (thank your eyes!).

In a matter of aspect ratio, while the vast majority of TVs in traditional screen has a 4:3 aspect ratio, the vast majority of LCD TVs have a 16:9” format, popularly known as Widescreen. And now as movies on DVD / bluray are being released in widescreen format, this TV cannot lose anything of the image, unlike the 4:3 screens, which always end up losing side of the images. To understand better, LG unveiled the difference between proportions using images:

 

Wide image

Image in a 16:9” (widescreen)

4:3

4:3 ratio images extended (conventional TV). The lighter part shows how much of the image is lost

Wide image at 4:3 aspect ratios

Image into widescreen on a 4:3 TV, The black edges serve to compensate for the aspect ratio. Very common to pass on 4:3 TVs DVD

 

Disadvantages:

Even with the drop in price, the LCD TVs can still cost up to 4 times longer than a conventional TV. Not only at the time of purchase you will have to spend more because of the technology involved in the manufacture of LCD TVs is no technical assistance that is able to fix the TV in case of problems? That are difficult to pass, but it is good to be prepared for any eventuality, right?

And the spending continues with “peripheral” not only just a TV with the ability to display images of higher quality. To receive this benefit you must have a BluRay player, subscribe to a cable television in high definition or buy a digital TV converter. But it is already possible to see a good improvement in the image to a DVD or a video game.

Now shifting spending to performance, the LCD TV has the problem of “ghosting” also known as “drag”, where in some busier scenes (especially in action scenes), is a kind of shadow during movement. To avoid this is to only choose models with shorter response time (below 15ms is ideal).

Example of viewing angle LCD TV

And because of backlighting, black TVs LCDs is not so black as well, pulling the gray and damaging the image quality. To avoid this is also simple, opt for models with the highest contrast (up to 20,000:1 is already good).

And some LCD TV models have a smaller viewing angle, to test this, simply trying to watch TV through “sideways”. Older models have a reduced side vision.

 

Good and Bad Benefits of LCD and Plasma

If you are looking for a FULL HD TV, one of the first decisions you need to make is choosing between LCD and plasma. Which is better? Unfortunately it is not that simple. Both technologies have their own set of advantages and disadvantages. The best choice depends a lot on where and how you intend to use your new TV FULL HD.

Technology Overview

A plasma screen consists of hundreds of thousands of plasma cells coated phosphor and electrodes placed between two glass plates. Despite the use of plasma display phosphors as traditional CRT (cathode ray tube) displays, the technology is very different: instead of scanning the matches on a line by line basis, with a beam of electrons from a vacuum tube bulky, the matches are lit electrically loading natural gases present in each small cell. Each cell or pixel contains a phosphor blue light, green light a match, and a match of red light. Varying illumination every match, the control panel creates lifelike colors billion.

The LCD display uses a grid of cells filled with a liquid crystal solution sandwiched between two polarized panels. Since liquid crystals do not produce their own light, LCD monitors are usually illuminated by fluorescent lamps at the back of the screen, some newer models of screens use LED lighting (light emitting diode). When liquid crystals are given an electrical charge from the thin film transistors matrix, they unfold to pass a specific amount of light, kind of like “shutters”. The color is produced by pairing these shutters with filters of red, blue and green to create three sub pixels per pixel cell.

Advantages and Disadvantages plasma screen

Plasma TVs are known for their high contrast ratios, black as ink deep, rich and realistic color, almost flawless viewing angles of 180 degrees, and excellent display of fast moving images. Indeed, while FULL HD LCD TV have made significant progress in all these areas , and the two technologies are very top today than they were a few years ago, independent tests continue to give the edge in overall picture quality for plasma . As for the price, the LCD and plasmas are comparatively cheap in the size of 42 inches, if you are looking for screens larger than 46 inches; you will usually find plasma screens more affordable compared between the two.

Then, raise the question of why plasma screen covers only 15 % of sales of TV FULL HD today. Differences in marketing certainly represent much about this differential, but if the screen has the best picture and lower price (at least in the larger sizes) and considerably fewer units sold, it is logical that can have some serious drawbacks.

Plasma monitors usually produce a better picture in rooms with low light; LCD is generally superior to the bright rooms, such as kitchens choice. In addition, the glass screen plasma TV may result in glare when viewing day with shutters or curtains open. Some manufacturers have implemented anti -glare and with varying degrees of success screens. Plasma screens also consume more power and are heavier due to the double glass plates. Moreover, the low air pressure at high altitudes (above 6,500 feet) can result in an annoying buzzing sound resulting from natural compressed gases in plasma screen.

However, a reason many people choose to avoid plasmas, despite the superior image quality and viewing angles is the fear of “burn-in”. Burn -in (also known as ghosts, shadows, image and permanent image retention) is a potential risk with all phosphor-based screens. Burn -in results in a damaged screen with pixels prematurely aged. Essentially, it prolonged exposure to a static graphic (e.g. the computer icons and task bars, station logos, panels, etc.) causes the screen to maintain a permanent image, ghost of this object type. Burn -in is excluded from the warranty, and once the damage is done, there is nothing that can fix it.

While the advances of the TV FULL HD technology, we highlight several types of anti burn-in technology, yet consumers are still advised to avoid displaying still images for long periods.

Advantages and Disadvantages LCD

 

LCD tends to be lighter, thinner and consume less power than plasma. It is a far superior choice for daytime viewing in a place with plenty of light coming through the windows. In addition, the LCD come in all sizes from small pocket and shows, and everything else giant screens, while plasma TVs are usually available only in sizes above 42 inches. This makes the LCD is ideal for bedrooms, kitchens, and anywhere else where a 42-inch screen can be overkill. And since there is no risk of burn-in, the LCD is often the preferred choice for heavy gaming and use of computer. Unfortunately, LCD has their own set of drawbacks. Since LCD shutter normally uses and still passes a small amount of light even when displaying black, the LCD has traditionally not been able to produce deep black see that in plasma. However, some of the new models with retro LED lighting come very close.

 

Another issue that has been much better is dealing with rapid movement. When LCDs were first introduced, there was a noticeable delay when fast moving content (e.g. sports, action sequences from films, games) was displayed. Some of new high-end LCDs offer optional update rates of 120 Hz and up to 240 Hz to combat this problem. These rates accelerated update to result in a reduction of motion blur when playing games or sports viewing, but can produce some unwanted side effects when we see movies. Another problem that has won improvements in recent years is the issue of viewing angle. However, as LCD monitors often claim the viewing angle close to 180 degrees as their horizontal counterparts in plasma, independent tests indicate that this is generally not the case. Depending on the displayed content (dark films are sensitive to distortions of the viewing angle of brilliant content, with bright colors, such as sports programming), the image on the LCD often begins to deteriorate slightly when viewed in a mere 10 degrees off center, and color accuracy takes a very noticeable dip when viewed at an angle of 45 degrees . (This is seen from the top or bottom of the screen). Note that the distortions of the viewing angle cannot be readily apparent in stores due to strong light, type of content typically presented, and the selected settings.

LCD or Plasma: Which is better for you?

 

As you can see, both technologies have advantages and disadvantages. We suggest that you consider a plasma screen is:

• Are you a movie buff and you’ll be using your new TV FULL HD mainly for watching movies , love movies, and even small details and things that other people may not realize – can diminish the pleasure of a movie .

• You will be sitting off center, looking at the screen, and / or your FULL HD TV is regularly watched by many people scattered around the environment.

On the other hand, consider an LCD display that:

• You will play a lot of games with static graphics and / or use your FULL HD TV as a computer monitor for day- to-day, and you want to not worry about burn-in.

• You are buying a TV FULL HD for a well-lit or daytime viewing in a room with lots of natural light streaming in through the windows room. – About

• Are you looking for a less than 42-inch screen?

For most other purposes, any type of display will work well. It’s just a matter of what you prefer.