Audio Video Revolution Forum  

Go Back   Audio Video Revolution Forum > Everything HDTV, High-end Video, HD DVD, Blu-ray and beyond > Plasma and LCD HDTV

Plasma and LCD HDTV Talk about flat HDTVs here.

Thread Tools Display Modes
Old 05-17-2011   #1
Super Member
Join Date: Aug 2007
Location: West Bloomfield, Michigan
Posts: 147
Post Engineers Try to Solve Ultrathin TVs

From The Wall Street Journal - Tuesday May 17, 2011


SEOUL—Ro Jae-song, a materials science professor here, has spent the past eight years researching a display technology called OLED, which is now used for some high-end cellphone screens.

Mr. Ro does contract research for South Korea's two big electronics makers, Samsung Electronics Co. and LG Electronics Co., on a difficult problem: How to build OLED screens big enough for large televisions.

It's one of the hot topics among display researchers and manufacturers who are meeting in Los Angeles for the annual conference of the Society for Information Display, or SID. More academic gabfest than trade show, engineers will trot out their latest ideas for displays as small as sheet-like films that roll up in a pen to as large as roadside billboards.

Some companies are working on better screens for tablet computers. Samsung and a U.S. firm called Nouvoyance discussed Monday a higher-resolution tablet screen. There's also a race to build touch technology of touchscreens into the screen itself.

"At the moment, touch is outside of the display," says Jang Jin, professor at the Advanced Display Research Center at Kyung Hee University in Seoul and former chairman of SID. "What we call 'inside touch' would save money for all of these devices that are becoming so popular."

Other firms are pushing energy-saving ideas. 3M Corp. researchers, for instance, will show a new power-saving design for desktop computer monitors, drawing their juice from the PC they're attached to rather than requiring a separate plug-in.

But for the TV makers that pull in biggest share of the industry's money, the focus is on OLED as a potential successor to LCD, or liquid crystal display, as the main technology for flat-screen TVs.

OLED, which stands for organic light emitting diode, has brightness and energy efficiency advantages over LCD. Today, however, only a handful of OLED TVs are available. Most are small and cost thousands of dollars.

So far, researchers haven't figured out a way to deposit the organic material over the large surface of a TV-sized screen with the speed required to build millions of units. "That is the most critical issue for OLED TV mass production," Mr. Ro said.

In the 1990s, display industry researchers were grappling with a similar problem in LCDs. At that time, the only way to evenly disperse liquid crystal was to let it seep in vapor form between two sealed pieces of glass, a time-consuming process.

At the 2001 SID meeting, International Business Machines Corp. researchers unveiled a dispersal method for liquid crystal that became known as "one drop fill." The idea revolutionized LCD production and, coupled with advances in the size of glass, made possible cost-efficient production of large-sized LCD-TVs.

The search for a similar advance to produce bigger OLED screens faces a major technical constraint. While only one coating of liquid crystal is needed in an LCD, an OLED screen actually takes three organic materials, one each for red, green and blue, the colors from which all other colors are formed on video displays.

The difficulty lies in aligning the OLED material so that colors are accurate across a large area. Just like liquid crystal was back in the 1990s, OLED material today is deposited in vapor form in a vacuum across a substrate and masks are used to align the three layers of material.

That technique works fine on screens the size of cellphones, but the masks tend to sag unevenly when pulled across larger surfaces. The result is that the OLED material is distributed imprecisely, creating mashed up colors or dead spots on a screen. "Everybody is working on this, all the big names," Mr. Ro says.

His company, called EnSilTec Co., worked with a Samsung affiliate on another OLED challenge involving the substrate. But the work is competitive and, late last week, the two companies were discussing how much they'd reveal during their scheduled presentation at the conference.
Ken S is offline   Reply With Quote

drop, engineers, ensiltec, fill, flat, jaesong, lcd, manufacturers, mount, nouvoyance, oled, ro, samsung, solve, tv, tvs, ultrathin

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help me to solve my problem!! jordane Music/Video Servers & MP3 Players 6 06-25-2012 02:58 AM
Samsung LED TVs rlpiii Plasma and LCD HDTV 37 06-07-2012 09:00 PM
120Hz DLP TVs????? andytk5 Rear Projection HDTV 3 05-18-2011 07:28 AM
3-D TVs, Without Glasses Ken S Plasma and LCD HDTV 0 10-05-2010 10:45 AM

SEO by vBSEO 3.6.1