All Samsung LCD monitors to be LED backlit by 2008, report says

eHDMI · 10-27-2006, 07:30 PM

All LCD monitors produced by Samsung Electronics will be LED-based by 2008, according to a report from the Korean-language Digital Times.

Samsung recently introduced an LED-based 20.1-inch LCD monitor (SyncMaster XL20) in South Korea with a price tag of 1,780,000 won (US$1,878). The new model is set to hit Europe and the US in November and December, respectively, the report noted. The company also plans to launch a 24-inch LED-based LCD monitor in 2007, added the report.

The SyncMaster XL20 features a contrast ratio of 1,000:1, brightness of 250 cd/m2, response time of 8ms, viewing angle of 178 degrees and has a color gamut of 114%, according to a Japanese press release from Samsung in late September. Samsung will start offering the 20.1-inch LED-based monitor in Japan in the second half of November at a price tag of 158,000 yen (US$1,333), the press pointed out.

In addition to LCD monitor, Samsung is also using LED technology in LCD TVs. Last month, the company released a 40-inch LCD TV, which features a 146% color gamut and a 10,000:1 contrast ratio.

Last August, NEC announced a 21.3-inch (MuultiSync 2180) LCD monitor using LED as the light source. The monitor achieves over 100% of Adobe RGB and NTSC color scales, according to the company.

Worldwide shipments of LCD monitors will reach 129 million units in 2006, 3% of which will be LED-backlit devices, sources at LED makers estimated.
Source

µCOM-4 · 10-28-2006, 08:39 AM

Why does Samsung always falsely advertise contrast ratios? 10,000:1? I think not..

BobY · 10-28-2006, 11:44 AM

Using technologies like this, it's possible to achieve dramatic improvements in black level because you can modulate the brightness of the backlight or even turn it off for individual pixels/pixel groups. From a *mathematical* point of view, this gives you a huge contrast ratio (the ratio of maximum brightness to maximum darkness), but whether it really provides the look of a display that truly has a huge, *evenly-distributed* contrast range remains to be seen.

In the early days of CD players, when their performance wasn't really that good, they would mute their outputs when the player was stopped or paused and produce total silence at the output. They used to measure the noise level using this as a reference which gave incredibly good signal-to-noise ratios. It was mathematically true, but had little to do with the actual signal-to-noise performance when playing music with the output unmuted.

On the other hand, it can only be an improvement and it should still look better than a conventional backlight.

ah802 · 10-28-2006, 12:41 PM

This technology is utilized in the brightside LCD's and to some success I would add. The cost reductions will have to come from mass suppliers. It would seem that all you have to do is control the LED bank with an image of the content. Key in the future is coloured LED banks, to add to the gamult.

Note: comments lifted from New type of HDTV Flat Panel Tech

BrightSide has been discovered by the Slashdot community... hopefully some of the big boys will notice and bring the price down.

http://hardware.slashdot.org/article...05220&from=rss

eHDMI · 10-28-2006, 08:04 PM

Great follow up guys!

µCOM-4 · 10-29-2006, 10:46 AM

Quote:

Originally Posted by ah802

This technology is utilized in the brightside LCD's and to some success I would add. The cost reductions will have to come from mass suppliers. It would seem that all you have to do is control the LED bank with an image of the content. Key in the future is coloured LED banks, to add to the gamult.

Note: comments lifted from New type of HDTV Flat Panel Tech

BrightSide has been discovered by the Slashdot community... hopefully some of the big boys will notice and bring the price down.

http://hardware.slashdot.org/article...05220&from=rss

It's not based on the same tech as Brightside.

It's based on the same tech as NEC's tricolor LED backlight. It is NOT an HDR display like the Brightside LCDs! The LED improves color gamut, it doesn't improve dynamic range like the Brightside.

ah802 · 10-29-2006, 12:52 PM

Quote:

Originally Posted by µCOM-4

It's not based on the same tech as Brightside.

It's based on the same tech as NEC's tricolor LED backlight. It is NOT an HDR display like the Brightside LCDs! The LED improves color gamut, it doesn't improve dynamic range like the Brightside.

It could... under program control, the dark areas of LED could be shut down, and improve the contrast, hence dynamic range. If NEC is using tricolour LED's and controlling their brightness, then simply turning them off would accomplish the same thing... If this is not the engineering, it will be soon enough.

µCOM-4 · 10-30-2006, 03:33 AM

It could if they licensed Brightside's tech but they didn't so it's just a plain wide color gamut LED backlight with dynamic contrast. It's not an HDR display. There have already been computer LCDs on the market that have dynamic constrast that uses CCFL using LG/Philips LCD panels with 1600:1 dynamic CR. Substituting LEDs doesn't make it an HDR display like the Brightside LCD. Using tricolor LEDs allows wider color gamut like the wide color gamut CCFL SONY uses in their Bravias.

Brighside's technology allows controlling individual portions or groups of LEDs in the display. Samsung's tech doesn't do this. All it does is dynamically control ALL of the LEDs' brightness at the same time not individual groups of LEDs. BTW contrast and dynamic dange are not the same thing. That's why Brightside's LCDs have a dynamic range of up to 200,000:1 eg one corner can be extremely brightly lit by LEDs while the opposite corner is competely dark with the LEDs turned off. You can't do this with Samsung's tech hence the dynamic range is no better than standard LCDs. The high CR however is achieved through dynamic contrast of the whole LCD screen like existing LCDs.

Quote:

The LEDs are arranged in an array where each LEDs luminance can be individually controlled faster than video refresh rates. This LED backlight array effectively constitutes a low-resolution, but very high brightness display. These current-controlled diodes are capable of generating over 75,000 cd/m2 at maximum current and emit no light in the off state. This low-resolution white-light LED image is then projected through a standard color LCD panel, which displays a similar, but high resolution, version of the image.

Each individually controlled LED backlights a small region of the LCD panel. This has the effect of multiplying the modulation of the two displays which provides the substantial gain in dynamic range. Thanks to software correction algorithms and the natural effects of scattered light in the human eye, the blur introduced by the low resolution LED image is imperceptible, and the result is a high resolution, high dynamic range final image.

Quote:

What is contrast ratio?
This is the range of brightness that a display can produce in a single image. Often dynamic range is used as a product spec and inappropriately labeled as contrast ratio; however, the true contrast ratio of any display device is lower than the dynamic range. It is measured by displaying a black and white checkerboard pattern and observing the brightness at the centres of the white squares and black squares.

How do you achieve 10x darker and 10x brighter in the same image?
We utilize a dynamically controlled array of LED's as the backlight for the LCD panel. We individually control these LED's to produce light only where the image needs it. If the image content is black or dark we simply turn down the LED's behind that part of the screen. Where the image content requires brightness we turn up the LED's in that region.
In contrast most displays today cannot produce a true black. Traditional LCD's for example have a backlight that is set to a constant level regardless of image content.

µCOM-4 · 10-30-2006, 04:23 AM

http://www.brightsidetech.com/tech/p...amic_Range.pdf

bikeboy008 · 11-05-2006, 12:40 PM

I am now totally confused, when looking at projectors I understand the lumens (brightness) however I am so confused on the contrast ratio. I am converting my garage to a media room. There will be no windows or outside light sources. What would be the best way for me to approach the Light vs Contrast Ratio. Am I going to be able to live with say 1500 Lumens and a CR of 500to 1 or do I need to look for a larger ratio?
This is an ongoing project I am not ready for the projector yet, probably in the next 6 to 8 months.

10-27-2006, 07:30 PM	#1
eHDMI Vizio 37 LCD Join Date: Mar 2006 Posts: 1,647	All Samsung LCD monitors to be LED backlit by 2008, report says All LCD monitors produced by Samsung Electronics will be LED-based by 2008, according to a report from the Korean-language Digital Times. Samsung recently introduced an LED-based 20.1-inch LCD monitor (SyncMaster XL20) in South Korea with a price tag of 1,780,000 won (US$1,878). The new model is set to hit Europe and the US in November and December, respectively, the report noted. The company also plans to launch a 24-inch LED-based LCD monitor in 2007, added the report. The SyncMaster XL20 features a contrast ratio of 1,000:1, brightness of 250 cd/m2, response time of 8ms, viewing angle of 178 degrees and has a color gamut of 114%, according to a Japanese press release from Samsung in late September. Samsung will start offering the 20.1-inch LED-based monitor in Japan in the second half of November at a price tag of 158,000 yen (US$1,333), the press pointed out. In addition to LCD monitor, Samsung is also using LED technology in LCD TVs. Last month, the company released a 40-inch LCD TV, which features a 146% color gamut and a 10,000:1 contrast ratio. Last August, NEC announced a 21.3-inch (MuultiSync 2180) LCD monitor using LED as the light source. The monitor achieves over 100% of Adobe RGB and NTSC color scales, according to the company. Worldwide shipments of LCD monitors will reach 129 million units in 2006, 3% of which will be LED-backlit devices, sources at LED makers estimated. Source __________________ Discount HDTV Accessories HDFury

10-28-2006, 08:39 AM	#2
µCOM-4 High Definition is the definition of life. Join Date: Oct 2005 Posts: 699	Why does Samsung always falsely advertise contrast ratios? 10,000:1? I think not.. __________________ My name is David Manning.

10-28-2006, 12:41 PM	#4
ah802 Visual Arts Join Date: Mar 2005 Posts: 1,241	One can only hope that Samsung has discovered the future. This technology is utilized in the brightside LCD's and to some success I would add. The cost reductions will have to come from mass suppliers. It would seem that all you have to do is control the LED bank with an image of the content. Key in the future is coloured LED banks, to add to the gamult. Note: comments lifted from New type of HDTV Flat Panel Tech BrightSide has been discovered by the Slashdot community... hopefully some of the big boys will notice and bring the price down. http://hardware.slashdot.org/article...05220&from=rss

10-28-2006, 08:04 PM	#5
eHDMI Vizio 37 LCD Join Date: Mar 2006 Posts: 1,647	Great follow up guys! __________________ Discount HDTV Accessories HDFury

10-30-2006, 04:23 AM	#9
µCOM-4 High Definition is the definition of life. Join Date: Oct 2005 Posts: 699	http://www.brightsidetech.com/tech/p...amic_Range.pdf __________________ My name is David Manning.

10-28-2006, 11:44 AM	#3
BobY What's all this, then?... Join Date: Jan 2006 Posts: 6,197	Using technologies like this, it's possible to achieve dramatic improvements in black level because you can modulate the brightness of the backlight or even turn it off for individual pixels/pixel groups. From a mathematical point of view, this gives you a huge contrast ratio (the ratio of maximum brightness to maximum darkness), but whether it really provides the look of a display that truly has a huge, evenly-distributed contrast range remains to be seen. In the early days of CD players, when their performance wasn't really that good, they would mute their outputs when the player was stopped or paused and produce total silence at the output. They used to measure the noise level using this as a reference which gave incredibly good signal-to-noise ratios. It was mathematically true, but had little to do with the actual signal-to-noise performance when playing music with the output unmuted. On the other hand, it can only be an improvement and it should still look better than a conventional backlight.

11-05-2006, 12:40 PM	#10
bikeboy008 A couch and an HDTV to go please. Join Date: Feb 2006 Posts: 12	I am now totally confused, when looking at projectors I understand the lumens (brightness) however I am so confused on the contrast ratio. I am converting my garage to a media room. There will be no windows or outside light sources. What would be the best way for me to approach the Light vs Contrast Ratio. Am I going to be able to live with say 1500 Lumens and a CR of 500to 1 or do I need to look for a larger ratio? This is an ongoing project I am not ready for the projector yet, probably in the next 6 to 8 months.