How does ccfl backlight work

LED edge lighting is a popular technology because it enables manufacturers to make tellies with the whisper-thin profile of a supermodel after a particularly minimal lettuce salad. That makes them suited to hanging on your wall. It's a good technology for the most part, although it's not as bright as a direct LED backlight system, and, on TVs larger than 50 inches, you're likely to see less light in the centre of the image than at the sides. We were recently told by Toshiba that the British public would rather have slender sets than high-quality pictures.

We nearly vomited in disgust. Although better than CCFL backlights, LED edge lighting can require a fair amount of power, because the process of getting light across the whole of the LCD panel means you need higher brightness levels than in a direct system. Here you can see how compact the LED lighting at the edge of the screen is.

You can also get a sense of how the light is diffused over the entire surface of the LCD panel. The most sophisticated and best-performing technology is direct LED backlighting with local dimming capability. Unfortunately, it's also the most expensive to implement. Such backlights offer black levels closer to those of plasma TVs than LCD sets have traditionally been able to offer.

This is because the LEDs are arranged in groups which can be turned off or dimmed when not needed. This sort of backlight can easily cope with bright and dark areas in the same image, by dimming the dark region while keeping the light area at maximum brightness.

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However, they each have different advantages and disadvantages. CCFLs are the traditional standard for backlighting. They are the tried-and-true option for backlighting any LCD display. There are several reasons. First, they provide high brightness levels. On the other hand, LED backlights are getting more traction as of late. They are relatively new and most experts consider them the backlighting preference of the future.

Most new displays are only available with LED replacements. One exception is if you have customized your display for LED use. Yet, some of the advantages of choosing an LED include superior brightness levels, no inverter is required only a power supply , durability is better, and they can provide longer life for more cost. Depending on your application, other types of backlighting might also be available. LCD TVs, for example, use both full-array and direct local backlighting.

For manufacturers, however, there is a difference. LEDs that are spaced farther apart do not have the same consistency or accuracy in lighting that full-array displays do. If your LCD screen is dimming and not offering the same consistent bright display as it once did, it could be time for repairs. It is far more cost effective than total replacement as well. You will also have to work around a copper ground or LCD controller board because these often limit access to the backlight.

Noting where you removed these items and where they should go back to is important during the removal process. Next, access the CCFL bulb. Often it has its very own spot. Remove the rubber caps from the previous bulb and add them to your replacement bulb. Run the power cable back into one end of the new bulb—potentially using a soldering tool to do so.

After you finish these steps, replace the CCFL and any other components back into your display and test the result. In the vast majority of cases, your screen will be returned to its full brightness potential, just like new. Did replacing your bulb not do any good? Then you might be dealing with dying capacitors, inverters, or transistors. Finding the correct backlight can be challenging and getting it wrong can cause you a serious headache. We offer affordable replacements that get your screen back to its original brightness without the high costs of buying an entirely new panel.

Give our site a browse to find the right components for your LCD display or contact us at sales plazmo. Close search. Shop LED expand.