Difference Between Plasma and LED TV

Home Computers & Technology
By: Naveen Verghese Email Article
Word Count: 1268 Digg it | Del.icio.us it | Google it | StumbleUpon it



In terms of shopping for a High Definition Television [HDTV], shoppers ask themselves an indispensable question! Should I go for a Plasma TV or perhaps an LED TV? What's the difference between plasma and led? What's the technological difference between plasma and led? In case you are one of them, then, yes, you are well on a suitable page. Today, I'll explain all about it.

Plasma TV

Plasma TVs make use of a plasma display panel [PDP], which is a flat screen TV. It’s usually used on big screen TVs. Behind the flat screen of your plasma TV; you can find countless tiny dots, technically called pixels or cells. Each and every single cell has three sub cells within it, one sub cell is treated with phosphor that glows red when photons strike, the other is coated with phosphor that glows green when photons strike, and the last is coated with phosphor that shines blue. These cells have a combination of xenon and neon gases that has a very small amount of mercury in it. When a power charge is directed to the cells, the gas inside each cell forms plasma. While electric current flows through each cell, the loose electrons moving throughout the plasma, collides with all the mercury molecules. This collision greatly spikes the energy of the molecules and the excess energy is diffused as ultraviolet photon. The phosphor coating inside the cells, when struck by the photons creates assorted wavelengths of light. The color produced depends on the phosphor type coated inside the cells. The cells we talked above are generally a teeny-weeny neon lamp, containing the gases and phosphor coatings. Depending on video signal coming into the TV, these several colors orchestrate that creates the all-embracing color of the cells and thereby form the whole colorful images on your screen.

Referring to the resolution, the plasma TVs today, usually consists of a typical native resolution of 1080p. Plasma TV resolution is not an important factor towards the overall picture quality when compared to additional factors like contrast ratio. The very best three important factors that govern the image quality is contrast ratio, color saturation and color accuracy.

Here area some of the pros and cons of Plasma TV:

Pros

? Produces deeper blacks and hence excellent contrast ratio. Contrast ratio is the difference between illuminated and darkest portions pertaining to an image. Higher the contrast ratio, sharper the picture

? High refresh rates and as such less motion blur. Refresh rate is the frequency in one second that the display draws the data/image. Motion blur is when showing moving images, the television has to draw images in pixels, so quickly that the human eye cannot detect. In case the refresh rates are less, a moving image will cause a blur

? Viewing angle is much more wider than LCD. In LCD, in case you view one of your favorite programs or shows from an angle, the photograph degrades

Cons

? Screen burn. There are technological advancements to decrease screen burns but still don’t prevent it. Whenever a non-moving image or text is displayed for a prolonged time, it can result in permanent ghost-like image of these images or text

? Power consumption is significantly more than LCD or LED

? Might lead to buzzing noise when used at high altitudes; this is due to of the pressure difference involving the gases inside the cells and air pressure at high altitudes.

LED TV

Light emitting diodes [LED] are illuminated by way of the free movement of electrons via a semiconductor. LED is a semiconductor. Semiconductor means, a substance, which can have a fluctuating capability to conduct electricity. The material used to construct LED is aluminum-gallium-arsenide.
LED TV is, as a matter of fact just an LCD TV, which uses light emitting diodes [LED] as the source of light to light up the screen, unlike LCD TVs, which use Cold Cathode Fluorescent Lamps [CCFL]. An LED is essentially a teeny-weeny lamp. Unlike the regular lamps, it doesn’t possess a filament to burn out. LEDs have got a really durable life span compared with a regular lamp or fluorescent lamps. This is among the many main differences between Plasma and LED TV.

LEDs may well be laid in numerous configurations behind an LCD screen and uses either white LEDs or RGB [Red, Green, Blue].

Full Array LED TV. [With local dimming]

In this configuration, full array of LEDs is arranged behind the entire screen. Certain zones of LED at the rear of screen can be locally dimmed or brightened. Therefore if the picture on the TV demands certain areas to be dark and other spots bright, the LEDs will be dimmed in dark fields of the image and brightened in brighter regions the picture. This results in an enhanced contrast ratio, and hence sharper picture. Two kinds of LEDs are employed in full array, White and RGB [Red, Green, Blue]. TVs with RGB LEDs are capable of a far better color range.

Pros

? Can produce deeper blacks and therefore higher contrast ratio and sharper picture than Edge-lit models. Contrast ratio is the distinction between illuminated and darkest portions of an image. Higher the contrast ratio, sharper the picture.

Cons

? Slightly thicker than Edge-lit LED TVs

Edge-Lit LED TV. [With local dimming]

A very few hand select models are available in this model from Sony, Samsung and LG. Edge-Lit LED TVs have LEDs arranged down the four sides of the TV, in contrast to the complete screen. A special light guide is made use of to spread the light uniformly across the screen. While in this model, local dimming is possible in certain areas of your screen without placing LEDs behind the screen. Picture is sharper as opposed to the Edge-lit model without local dimming but is not same with full array models.

Pros

? Can produce deeper blacks and achieve higher contrast ratio than Edge-Lit models without local dimming. Contrast ratio is the difference between the illuminated and darkest portions associated with the image. Higher the contrast ratio, sharper the image

? Thinner profile than full array model

Cons

? Picture isn't as sharp as full array models.

Edge-Lit LED TV. [Without local dimming]

This model is same as Edge-Lit with local dimming except that local dimming will not be a possibility.

Pros

? Thinner design than full array models.

? Weighs lower than full array models.

Cons

? Contrast ratio is not so good as full array, because local dimming is not possible. Contrast ratio is the distinction involving the illuminated and darkest portions associated with the image. Higher the contrast ratio, sharper the image

? Lighting may not be uniform across screen
In this article, we described the difference between Plasma and LED TV, the substances utilized in construction of each and every and the advantages and disadvantages. Hope the details offered can help as part of your HDTV shopping.

For more information the difference between Plasma and LED TV, make sure and follow the link in the resource box below..
Related reading:Effio-P CCTV Cameras pomp double jet hand dryer Isolator Polarization Beam Combiner/Splitter

Safety Measures Of Using Hipot Testing

Hipot testing, in the electrical testing eHipot Testing - Safety Measureshod which requires high voltage electricity testing equipment to perform the task of verifying electrical insulation in various appliances, cables and wired assemblies etc. Hipot is the abbreviation for high potential and is the test which is conducted to determine whether the insulation level of any electrical or electronic component is sufficient to protect the operator from electrical shock. They are applicable for use in printed circuit breakers and boards, electric motor and transformer as well.

This write up throws some light on the various testing measures with reference to hipot testers. While working with any electrical test equipment, it is very crucial to review the techniques employed in determining the output from potentially dangerous and complicated equipment. Following are a few safety measure that one should keep in mind while working on hipot testers, which when ignored can result in grave hazards.

First of all, one should be aware that the high voltage and current generated by the Hipot Tester can result in harmful electrical shocks. To avoid this make sure that the work station is configured in a well equipped with a safe test environment.

Performing an electrical safety test at a workstation which is bedecked with an Electro Static Discharge is a must as it is structured to carry on the electricity to scatter an electrostatic

charge. This step will ensure that the employees will be prevented from experiencing uncanny shock hazards.

Another important safeguard is that one should install a main power shut off switch in the test station as then it will be easy to control the crisis by just switching off one switch. Also its important that this main switch is located as well as prominently market at the entrance of the workstation so that its easy to be located during contingency.

While conducting the hipot test remember that the hipot test done on an energized circuitry or equipment can result in damage. This is done after the testing area is set up all the operators have been trained. Following the instructions is the only way via which a person can escape calamities.

Keep the untrained and unqualified persons at bay from the work site and not make any unauthorized modifications on the test equipment. Always remember to avoid touching the product or connections during a test and ensure that before the you touch the connection, the equipment has been properly been removed from any current source.

.
Related reading:AC DC Hipot tester for sale pomp double jet hand dryer Floor polishing pad Mini Music Vibration Speaker Power Pod

The Advantages of Polycrystalline versus Monocrystalline Modules

Solar panels are composed of the semiconductor material silicon (the second most abundant element in the earth’s crust), which absorbs light energy and excites atoms to produce electrical current. There are two types of photovoltaic solar modules: monocrystalline and polycrystalline which refer to the crystal formation of the silicon solar cells. Remembering the distinction is simple; monocrystalline modules are made of single silicon crystal cells while polycrystalline modules are made up of cells with many silicon crystals.

The difference comes from the manufacturing process. A mono cell solidifies as a single cylindrical ingot that is made from slowly pulling a single monocrystalline seed crystal from high-heat molten silicon. The ingot is then sliced into thin pieces, which are laid down to form the mono solar module. The many crystals that make up polycrystalline cells are formed due to the quick cooling of silicon from molten liquid form in large casts by the solar panel manufacturers in Ontario. Polycrystalline cells are less expensive to make because they are faster to factory produce while producing a mono cell is more time consuming.

Is one better than the other? Comparing monocrystalline and polycrystalline modules (without looking at specific requirements) is like comparing apples to oranges. It is a common misconception that mono modules are better because they are more expensive and made of single crystals. Mono may have a higher rated power per square feet (saving physical space) but this doesn't necessarily mean it is a better module.

The important thing to note is the energy yield of the module (the actual energy produced per kWh). Solar system owners are paid by the kilowatt hours they supply to the grid with the Ontario feed-in-tariff (FIT) program. In practical testing conditions (PTC) polycrystalline modules usually outperform monocrystalline modules. Practical testing conditions generally provide accurate performance estimates as they test “real world” conditions. Since poly modules perform better, they generate more energy and therefore more energy is fed into the grid, which the system owner will financially benefit from due to the FIT program.

Light degradation of the module is also an important factor to consider. This phenomenon occurs in the first 60 hours of the module being exposed to the sun and the wattage power of the module is reduced as light degrades the cells. Mono cells have a 3% degradation rate and therefore a 250Wp monocrystalline module, for example, will actually perform at around 242Wp while a 250Wp polycrystalline module which only has a 1% light degradation rate and will perform at around 247Wp. Considering the Ontario solar provider is paid by kilowatt, the consumer is paying more for mono while actually getting a higher energy yield with poly.

Whether you are leaning towards mono modules or poly modules, the most important thing you must consider is the Ontario solar panel manufacturer. Different brands have different manufacturing methods and quality standards that greatly affect performance and durability. In conclusion, the wattage of the module is not as important as the energy generated by the module, which is directly correlated to the quality of the module. This will maximize the solar system owner’s investment return..
Related reading:solar panel Tungsten fresnel double jet hand dryer Metal briquetting press