LED backlighting of LCD display screen - question

I have recently written one or a few posts alluding to my search for a replacement for my recently-deceased Dell XPS M1330 PC. I've found a few used M1330's that feature LED backlighting of the LCD display screen. I'm curious--how does the LED backlighting work and how does the backlighting enhance the screen image?

Thanks much for reading and any information.

Ken

 

When the XPS M1330 was introduced, the LED backlit display was a $150 option. It had the same 1280x800 resolution as the standard CCFL display, but reviews make it clear that it was better in almost every other way!

It offered significantly higher brightness, better color reproduction and increased viewing angles. Dell also made the lid/display slightly thinner for the LED-equipped models (by 2.5mm). At the time they claimed that it was the thinnest laptop in the world.

LED displays use less energy than CCFL panels, so battery is improved. As a rule, LEDs also last longer (and don't degrade as they age) compared to CCFLs.

Hope this helps! Let me know if you have any other questions and I'll do my best to answer them (or find someone who can)!

 

A whole lot longer. They're also more localized so you can specify which one are lit ans which remain on. This enhanced option is not available with CCFLs. Their only real con is that they cost more.

 

White led's wear out over time and lose their whiteness. Also, brightness, viewing angles, and color reproduction have nothing to do with LED vs CCFL. And not all LED backlit screens are more energy efficient than all CCFL backlit screens.

I'm not sure that screens like this are found in laptops.

 

In any technology there is almost always some amount of crossover. Still, I have yet to see a CCF display that look better than one that uses LEDs have you?

 

I was comparing the specific displays available on the Dell XPS M1330. The LED display offered superior performance in all of those areas listed over the standard CCFL panel. This is based on actual tests conducted at the time as well as historical specs from Dell on each display.

Also, in regard to maximum brightness levels, many LEDs can now exceed 300 or even 350nits. With the exception of a few power-hungry dual-CCFL displays, I've never known of any CCFLs that were nearly as bright.

 

The quality of the panel depends completely on the manufacturers specifications. You may be much better off with a different CCFL screen as far as colors, contrast and viewing angles go.

I'm sure Dell uses many different ccfl panels on the m1330 and you could use even more. Although there may be issues with that because I think there is some EDID whitelisting, based on my experience with the m1530.
Maybe you could try a display that Macbooks use.