led panel flat Tag

The Differences Between LCD Televisions With CCFL and LED Backlights

LED TVs are a member of the LCD TV family from the technical viewpoint. The screen of a LED TV is a liquid crystal display similar other LCD TVs. The main difference between the two is the different backlighting techniques which change the picture quality characteristics dramatically.

While normal LCD TVs use so called cold cathode fluorescent lamps (CCFL) for the backlights, LED TVs use light-emitting diodes instead. The result of using LEDs is a bigger dynamic contrast, which means darker blacks and whiter whites. Especially black very often appears as a dark grey on regular LCD TVs. Since LEDs are very slim this leads, in most cases, to a slimmer TV as well. They are also saving a lot of energy compared to CCFLs and often stay below the Energy Star seal requirements, which positively influences your electricity bill as well. There is less pollution when recycling them, too.

LEDs have small disadvantages as well, depending on the dimming method. While top of the line televisions tend to use the new precision dimming feature often referred to as local dimming, older models are edge-lit only. Still better than the CCFLs, but the illumination created this way isn’t perfectly homogeneous.

Always keep in mind that the quality of the display, no matter if LCD or LCD with LED backlight varies alot, depending on size and manufacturer. It’s always recommended to check an electronics store close to you, even if you are planning on buying your new television on the internet. Leading brands often offer superior service compared to unknown foreign manufacturers, so the price and image quality are the only factors to think about.



Source by Sam Stark

Why LED Backlight Screens Are Better Than Traditional Ones

A backlight (or backlit) is a form of illumination that used in LCD (liquid crystal display) screens. In other words, backlight is an internal source of white light that illuminates the LCD from the back of the display panel. This is how most modern laptop screens and desktop monitors are built. Note, LED-backlight LCD (or TFT) screen is not the same as an OLED (Organic LED) active screen which does not require a backlight to function.

Only a few years ago, display technology started incorporating LED (light emitting diode) backlights. Today LCD screens with LED backlight are still more expensive than traditional screens. Are they really better than old ones? Most computer experts would tell you that these new types of screens are brighter, thinner, less power-consuming (and less heat), and more reliable. They may forget to mention that these screens with LED backlight have longer life (old technology monitors starts dim after several years usage and loses brightness).

Also it is important that backlight-LED type of LCD screen is “greener” than a regular screen because it is mercury-free, less power-consuming, and able to prolong battery life in laptops (therefore, decrease its disposal problem). According to Dell’s internal research, switching all of its laptops to LED, which use 43% less power than fluorescent lamp will save consumers $20 million dollars in energy costs and 220 million kilowatt-hours over 2010 and 2011.

There is one more reason to switch to LED backlight. Regular screens use CCFL (Cold Cathode Fluorescent Lamp) backlighting that produces inaccurate color. CCFL emits white light that has nonuniform (stripped) spectrum. Actual white light (sunlight or daylight) has a continuous spectrum. And LED is able to produce such full spectrum white light. That is why LED-backlight screens are able to reproduce more natural and richer colors. The first users who gratefully noticed this were photographers, designers, and graphics professionals.

Important to note, now we see only the first generation of LED backlight monitors. They are not developed and worked out properly yet. In principle, manufacturing LED is cheaper than CCFL and, eventually, the monitors with LED backlit will be cheaper. Evidently, LED-backlight screen will replace soon older CCFL type as LCD replaced CRT in the past. However, it seems, the true revolution will come with OLEDs.



Source by Alex Smartson

LED Grow Lights Vs HPS – Deciding On The Right One

Finding the right grow light system for an indoor garden is not as simple as it may first appear. A person has a wide range of choices when it comes to choosing a indoor system set up for their plants. A common choice for many individuals boils down to LED lights vs. HPS. LEDs, or light emitting diodes, have not been around very long and many people may not understand some of the advantages that come from them. On the other hand, HPS, or high-pressure sodium bulbs, are popular with many indoor gardening enthusiasts. The LED light panels vs. HPS debate often comes down to a couple of key factors.

One of the important determining factors when it comes to choosing LED grow panels vs. HPS is the fact that LEDs cost significantly more than high-pressure sodium bulbs. The price difference can be quite large, especially if a person needs a large lighting system set up for a big indoor garden. Before ruling LEDs out completely, however, a person should consider the entire cost of ownership rather than just the initial purchase price. If purchase price alone was the determining factor, the LED grow panels vs. HPS debate would be an easy one.

Because LEDs use only a fraction of the energy required by high-pressure sodium bulbs, they can be much more cost effective in the long run. It is also important to keep life span in mind when choosing between LED grow lights vs. HPS. Although high-pressure sodium bulbs have a decent life span, they simply cannot compare to how long LEDs last. Cheaper energy bills and fewer replacements may make it easy to choose between LED grow lights vs. HPS. A final important factor to keep in mind when choosing between LED grow lights vs. HPS is the amount of heat put out by the bulbs.

If an individual is growing plants in a cool area such as a basement then high-pressure sodium bulbs may be the best choice. However, because of the heat put out by HPS bulbs, they can dry out or scorch plants. If a cool running light is important then the LED grow lights vs. HPS question is an easy one. A person choosing between LED grow lights vs. HPS should also keep in mind that it may be necessary to add some kind of ventilation to the area if they choose high-pressure sodium bulbs.



Source by Mark Andrew Plummer

LCD TV – The Good and the Bad

The Good

An LCD TV is very thin and light and therefore great to save space. Anyone who has an LCD monitor for their desktop computer will relate. Remember the large chunky one ones we used to all have? That is what a standard television set is like now. Along with great picture quality there is almost not static image burn-in problems because the fluorescent backlight is filtered by the liquid crystal in solid state.

The TV lasts a life time or for as long as 50,000 to 80,000 hours claimed by manufacturers. This outshines the plasma whose life expectancy is much less. These TVs will last as long as the backlight can produce white light. The backlight can be changed out too so they are extremely good value in that regard. It can also be doubled up for use with a computer of any kind. Most computers monitors are LCD anyway.

LCD’s are economical meaning they are good for the environment. LCD TVs use less power than Plasma TV’s or CRT TV’s and in some cases less than half the power!

The Bad

They are not currently available in the larger sizes greater than 40in. When made in larger sizes, they are more expensive than plasmas.

The use of filters and a white backlight can reduce the quality of a true red green and blue output. Blacks look more like dark grays because some of the white light always passes through.

There is a possibility for reduced angle of vision. As the white light passes directly through an LCD pixel and the nature of polarizing filters, the viewing angle is decreased. You will notice loss of quality for blacks and colors at angles greater 20 degrees off axis.

To be fair I think the good outweighs the bad and they are extremely good value for money compared to the plasmas unless of course you want a really big screen.



Source by Steve Knowles

The New Samsung 3D LED TVs

Finding the latest 3D film used to be the biggest thrill back in the day. Now Sansung has changed this bigtime! Samsung has now introduced to a home near you the first ever 3D LED Televisions. Remember those old cheap paper 3D glasses from yesteryears?

We you won’t need those anymore! They have been replaced by the new active matrix shutter glasses, These cool glasses look like there straight out of the film The Matrix,. How cool to not have to wait for the latest 3D film! No more waiting in long lines and having to sit in crowded theaters eating overpriced popcorn. lol. Now all you have to do is simply pop in you Dlu-Ray disc of your choice in the 3D player and prepare for a mindblowing evening.

3 Models where introduced lately you have the Samsung UNC7000 there is also the UN8000 buy Samsung 3d and the super thin UNC9000 all were introduced a CES spring of this year, We saw these screen upclose and wow, they even had he 3D DEMOS. I tell you what the the New Samsung 3D will diffently be a game changer. They have such a relistic display we were actually scared watching a scary movie on this screen, As monsters on the screen seem to leap right into your living room.At CES the guys at Samsung also showed off there new built-in App Store,which is like a new mindblowing Apple Tv store,This was a really cool feature.Now you dont have to run to the computer to email that girl from spring break last summer, you can do it all from your living room. Now Facebook, Twitter, YouTube even Pandora And Netflix will be available and many other apps.Many secret apps are planned also, Everything we saw TV and online app wise performed flawlessly.

Prices and ordering

The samsung 3d isn’t the cheapest though, the 3D Series starts at just under $2000,and they go up to $7000,they have many different models in stock and go on sale in April and May 2010, be prepared!



Source by Tristan Donald R Hernandez

4 Reasons to Get LED Solar Powered Lights

Home LED solar powered lights are the latest in solar power products to hit the market. By being free of relying on traditional electricity sources, these modern lights are a dream for designers when it comes to outdoor lighting.

How solar power LED lights came about:

Ever since solar power became portable, people have thought of as many solar power uses as possible. What made solar power so attractive for outdoor lighting was its portability – replacing the need for long, unsightly extension leads in the garden. Initially individuals tried using compact fluorescent light (CFL) bulbs, but the small solar panels could not produce enough wattage for the lights to burn bright enough.

As a result the solar light market was limited to places near the equator with large amounts of sunlight. And even then the solar panels and batteries had to be large enough to cater for the period of longest nights, shortest days and cloudiest conditions.

Then as LED lights started hitting the market, manufacturers realized they would be ideal for solar lighting since they burned brightly, but used minimal power. And thanks to technological improvements in home solar power LED lights, the solar lighting market is no longer confined to equatorial areas with the most amount of direct sunlight and highest temperatures.

So what were the technological improvements, and how did they benefit the solar market?

They were:

1. Optimized system efficiency

LED lights are now capable of optimizing current flows, where no power is wasted, so the overall system efficiency is almost 100 percent.

2. LED’s can be fine tuned

Since solar LED lights can be programmed, users are now able to select not only where the light is delivered but also how brightly and when it is delivered. This has led to a reduction in solar panel and battery size by as much as 50 percent of the original outdoor lighting system.

3. Effective illumination

LED lights are able to provide directional beams of light, where about 90 percent can be used for ambient lighting and a further 70 percent for task lighting.  Furthermore, a 45 lumen LED light can create the same amount of light as a 75 lumen CFL bulb, resulting in lower electricity usage and costs for running a home power solar lighting system.

4. Improved performance, efficiency and lifespan in cold temperatures

Most outdoor lamps tend to lose performance and lifetime in colder temperatures – where they seem rather dim or burn out very quickly in sub-zero climates. But LED’s are different – they don’t produce light from a filament, but rather a micro-chip. And since micro-chips run better at lower temperatures, solar LED lights can last 5 to 10 times longer than CFL bulbs.

With all these technological breakthroughs anyone is now able to enjoy home LED solar powered lights at home, no matter where they live. And if you know how to make your own solar panel system, all you have to do is add some inexpensive LED lights to enjoy free outdoor lighting. It couldn’t be simpler!



Source by Tim McDonald

How to Convert Your Boat to LED Lighting

You’ve considered running the genset (noisy) more, another solar panel (somewhat pricey), or are maybe even ponying up the benjamins for a wind generator (very pricey and somewhat noisy). It’s not as though you need a lot of power you tell yourself. All you want to achieve is more time cruising and less time at the dock or running the genset. Before you jump in, I have a more cost effective solution for you. Enter the boat LED.

LED is an acronym for Light Emitting Diode. They are an electronic device that generates light and the technology has finally matured enough to make them bright enough, the right color (early white ones were very bluish in their light emission), extremely energy efficient, and quite long lived.

The intensity of light from LEDs is now surpassing incandescent and halogen bulbs.

The colors available are varied but they can now be had in a color referred to as “warm white”. This is a reference to the light color, which tends to be a warmer golden color, rather than the old blue white.

Energy consumption is frequently measured in milliamps. At 12 volts, a 1.3w LED cluster is drawing approximately 110ma. Figure the average CFL bulb draws about ten times that amount but the LED is generally free of or contains very minimal amounts of mercury (look for an RoHS certification).

Expected service life is even more interesting. A decent LED should have a minimum service life of 50,000 hours. If you left the light on that translates to almost eight and a half years on constant duty. This means it will be ultra rare that they will need changing. This is especially nice if you have to climb to replace them.

So how do you replace the lighting on your boat with them? One way would be to replace all the fixtures on your boat with dedicated LED fixtures but the price adds up very quickly and, contrary to what current marketing may like, you may actually like your current fixtures. The simple method is to simply replace the existing light bulbs with LED equivalents. If you have housings that use a G4 halogen bulb for instance, you have lots of options for G4 LED replacements. You’ll only be limited by the space for the bulb and how bright you want it. Pull the halogen out, plug in the LED G4 marine led replacement, repeat as necessary with the other housings and you’re done. It really is that simple. Sure beats wiring another solar panel or wind generator doesn’t it?

Other bulb options exist, not just G4 LEDs. The 1156 LED, 1157 LED, and a number of others are available. The toughest part will be for those rare cases where a 32v electrical system exists (some of the larger early Chris Crafts are an example). 32v is too high for most the 8-30v LEDs and too low for the 120v LEDs. 24v systems can use the same LEDs that 12v systems do, in most cases.

Quality varies, but even most the stuff coming out of China now is ever of pretty decent quality. I’d just make sure they have the European CE and RoHS certifications.

Now, I have a point to be careful of. Be very careful with the navigation lights. There are VERY few bulbs out there that are actually approved by the USCG (United States Coast Guard) for use in navigation lights. There are some, but they are few and far between. Navigation lights are certrified as a combination of bulb and lens and consequently, some combos don’t meet minimum Coast Guard requirements. Furthermore, if you were to be in a collision and the insurance company found out that it was a non-approved combination in your nav lights, you could face the possibility of having your claim denied. Not a good situation to be in. Dedicated LED navigation light fixtures are available as are a few approved LED nav light bulbs.

So, change those bulbs first before you jump into more drastic measures and happy cruising!



Source by Cameron Benz

Low Voltage Lighting vs Solar Lighting

There is a growing debate over which type of landscape lighting is better:

Solar Lighting or Low Voltage Lighting.

This article highlights some of the pros and cons of both based on my own personal experience.

Low Voltage Lighting

This type of lighting is available in a variety of brightness levels and styles. The light emitted varies from fixture to fixture, but is usually very good. A transformer provides the electricity and can be controlled by an automatic timer. Low voltage lighting is shockless and safe to use around children and pets. It’s also cost effective and the hardest thing about the installation is burying the wires.

Some of the benefits of low voltage lighting systems are listed below:

A professionally installed lighting system has been known to increase the value and resale of properties. Showcasing your house at night with low voltage lighting helps potential visitors find your property easier too.

Compared with line voltage, low voltage is easily installed, safe to operate, extremely economical, and casts beautiful light.

As a homeowner, you can enjoy more hours outside entertaining friends and family. Low voltage lighting can even be wired on your deck giving you great ambient light or even direct light for your grill.

Low voltage lighting systems are expandable so they can be adapted as properties are expanded and/or owners’ needs change.

Proper lighting offers increased safety and security.

Some of the cons:

Bulbs burn out and need replacement.

Wiring can be damaged and need replacement.

Timers need to be reset with daylight savings ti

Solar Lighting

Solar lights use LEDs instead of traditional bulbs. LEDs last longer than any other light source, sometimes lasting as long as 10 years. This type of lighting requires no wiring and is the most energy-efficient lighting because it uses the sun’s energy to recharge batteries. It costs nothing to operate and is easy to install. However, it should not be used to illuminate large areas brightly or for activities such as grilling and socializing.

Some of the benefits of Solar Lighting:

Lasts longer than other light sources. With LEDs there is nothing to break, rupture, shatter, leak, or contaminate.

Unlike typical conventional light sources, LEDs are not subject to

sudden failure or burnout. There is no point in time at which the light source ceases to function; instead, LEDs gradually degrade in performance over time.

Reduced Maintenance Costs – Since LED based light sources last at least 10 times longer than a normal light source, there is no need to replace the light, reducing or even eliminating ongoing maintenance costs and periodic bulb replacement. This is especially nice if you have an area that is difficult to access to change bulbs.

Energy efficiency – You can rest assured knowing that you aren’t contributing nearly as much to global warming or the energy crisis when you use Solar products.

There is no mercury in the light source. Eliminating Mercury from your lighting system will enable you to meet new and future increasingly stringent environmental regulations.

Some of the cons:

The solar panels that typical lighting fixtures use need to be small. This means they collect less energy from the sun to recharge the batteries.

Areas that are frequently shaded or get little sun geographically also affect the recharging capabilities of the fixture.

The lighting is typically dim and does not cover much ground. It also tends to look blue even though it says they use “Super Bright White” LEDS.

The dim lighting means you have to use more fixtures, which creates a sort of landing strip look, or if you are using deck light fixtures they end up looking like a bunch of bug zappers, (without the ability to zap the bugs).

No matter how long they say that LEDs last, it has been my experience that the solar panel usually becomes covered in dirt and the batteries don’t last nearly as long as they are supposed to. You have to keep that solar panel clean or it won’t work, this means more maintenance more often.

Fixtures are usually set to come on at dark and off at light. Not much control there.

Summary

I tend to prefer low voltage lighting for the simple fact that it is better quality light and can be controlled better with timers. LED landscape lights will probably always be dim. Solar lights just don’t harvest much energy from the sun, so no matter how efficient their LEDs, they will never be really bright. In comparison to your cheapie solar lights, low voltage is likely to be a huge improvement, and the low-voltage installation process is not really that much harder than it would be for solar fixtures.

I say, low voltage is the way to go until the technology can improve solar panels ability to capture energy and LEDs ability to output more light.



Source by Steve Hodes Jr

The Ultra Slim and Multifunctional Samsung UN55b8000 55 LED TV

The Samsung UN55b8000 55 LED TV has one of the slimmest frames ever produced. It has a panel that is just 1.2 inches thick, which makes it an amazing spectacle to look at. Since its release in 2009, it has garnered multiple awards for its design and ingenuity. This ultra slim LED TV is definitely worth a closer look.

A television is the heart and soul of the living room. Not only does it need to blend well to its environment, it also needs to look great. The UN55b8000’s design is one of the things that make it stand out from other LED TVs out there. Its glossy black finish and crystal-clear neck gives it a very distinct and modern appearance. By far, it is one of the most beautiful LED TVs available.

Picture quality has always been a problem with slim LED TVs. The problems range from uneven lighting to inadequate color. The Samsung UN55b8000 55 LED TV has the best picture quality in its class. It has a 5,000,000:1 contrast, which provides can provide the purest blacks up to pristine whites. The Advanced Color Processing gives this Samsung model the most vibrant and accurate colors. In addition, the Auto Motion Plus 240 Hz technology can eliminate any motion blur from any videos. This results to crisp and fluid movement regardless of speed.

The UN55b8000 can also function as an internet-browsing device. It uses the latest browsing application, which makes surfing easy and stress free. This 55-inch LED TV does not suffer from any apparent lags or hiccups, which results to a great internet browsing experience. There are also widgets that are especially made for popular sites like Flickr and Facebook. This kind of model is taking home entertainment systems to greater heights.

In terms of connectivity, the Samsung UN55b8000 is one of the best-equipped LED TVs around. It has a PC input, four HDMI ports, and two USB ports. Since it has two USB ports, you can simultaneous connect two external hard or flash drives. Both ports will be function as fast as 480 Megabytes per second. Aside from its HDMI ports, it also has a built-in Ethernet port, which makes it networking ready device.

The Samsung UN55b8000 also has special features that highlight some very useful functions. You can set the device to Game Mode, which very useful when you are playing 3D games like Crysis or any other high frame rate games. If this model is on game mode, it is set to its highest refresh rate and fastest response time. The device can also do a Picture-in-Picture, which lets you watch two different channels at the same time.

Since the Samsung UN55b8000 uses the latest LED technology, it consumes up to 40% less power than conventional LCD TVs. Aside from being power efficient, the Samsung LED TV does not contain any harmful chemicals such as mercury. You can rest easy knowing you have one of the most environmentally friendly devices around.

Overall, the Samsung UN55b8000 55 LED TV is a gorgeous all around package. This ultra-thin 1.2 inch LED TV will definitely be a welcome addition to any living room. It provides the best picture quality and functionality while retaining its super slim frame. This 55-inch televison truly deserves two thumbs up.



Source by Joseph Clayton

How To Build LED Wall Lights

LED lights, known as Light emitting diode lights can easily be placed into any fixture designing for the installation. For the ceilings as used in many corporate areas and now in homes recessed type casing is used, but when required specially for the outdoors or any places where the ceiling height is very high, walls are used for the illumination.

LED lights attached with the walls are called Wall Sconces, or LED Wall Sconces. There are many versatile and flexible designs available in LED recessed Lighting. The styles are abundant in number, they have oriental designs, contemporary and as well as modern designs. Traditional designs with bronze coating are also available in choice. The additional flexibility of the Wall Sconces is that they can both be powered by a battery and also hard wired.

With a proper consultancy of lighting specialists and experts, wall sconces LEDs are used in all those spaces where power economy and minimum maintenance is the primary issue. The only limitation is there usage under certain temperature limits, specifically if chosen for external use, especially in hot areas. They have a very subtle and non obstructive design which makes them easily integrated into any architectural environment.

Depending upon the application and surroundings, they are available in different colors and shades. Furthermore for certain special occasions, the white bulb can be replaced with the colored ones.

Banks which need to be illuminated continuously even after the off timings, specially the main door ways and corridors can have a massive advantage of these Wall Sconces. The main frame in which the lighting element or bulb placed is very simple. A metal plate or frame is joined with the bulb holder and further covered with the shade; it could be a plastic, glass, polymer or ceramic. There is no complexity of engineering involved and therefore this factor also brings down its maintenance cost to minimum.

Due to its advantage and capacity to run on batteries it becomes ideal for use at the remote work stations, military camps, oil rigs, construction sites, ships, boats and even air planes, MRVs. Plus small housing colonies can induct them outside every house with the dual purposes of saving power, cost and proper illumination.

Any wall light we see around can be converted into wall sconces, simply by replacing the bulb light holder with the LED light, or at least all similar designs can be produced for the LED. In fact this would not only save the power, it would bring down the weight and ease in packing.



Source by Owais Siddiqui Jr