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Samsung's new LCD can display independent images on either front or back

When Samsung isn't making rapid advances in the area of memory technology, it's looking for ways to improve display technology. Samsung announced it developed the world's slimmest mobile LCD screen in November. The 0.82 mm thick screen featured a QVGA resolution and a 500:1 contrast ratio. Today, Samsung is showing off the world’s first truly double-sided LCD which can produce independent images on either side of the display.

Only a reverse of the original image data can be displayed on the opposing side with conventional double-sided LCDs. With Samsung's double-gate, TFT design, the LCD features two gates which operate each pixel instead of just one. This is what allows Samsung to produce two independent images. Amorphous Silicon Gate (ASG) technology also allows Samsung to manage the increase in TFT gates without a subsequent increase in driver ICs.

One backlight is shared between the two LCDs. The front LCD is transmissive and the opposing screen is reflective (which allows it to capture some of the light from the main screen). In its current form, Samsung's double-sided LCD is 2.6mm thick with a QVGA resolution. Brightness levels register at 250 nits for the front panel and 100 nits for the back panel.

"Our new double-sided mobile display underscores Samsung's commitment to equip our customers with advanced display technology that accelerates the trend toward slimmer mobile products. We anticipate high demand when we commence mass production in the first half of 2007," said Samsung Executive Vice President Yun Jin-hyuk.

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RE: What use do you have for a double sided LCD?
By chaos386 on 1/4/2007 1:57:59 PM , Rating: 3
A lot of flip phones already have two LCDs, at the cost of having a bulge to accommodate the second screen, double backlights, double the circuitry, etc. This is a way to get the same result using less power, since they'll share the backlight and a lot of the circuitry.

By GaryJohnson on 1/4/2007 2:14:30 PM , Rating: 2
I have a Cingular 3125 (HTC StrTrk); from my observations it seems to share a single backlight between it's external and internal displays.

RE: What use do you have for a double sided LCD?
By Serlant on 1/5/2007 9:30:13 AM , Rating: 2
i would think it would be a bit slim for a mobile screen? becuase it is so thin. You couldnt really make it fatter because it shares the same light source, so you'd either have ti case it in somethingand have a very think piece of plastic infront of one side, or put it in the middle and have half as thick plastic on either side. maybe? :S.

By GaryJohnson on 1/5/2007 4:12:23 PM , Rating: 2
There appears to be about 1mm to 2mm of empty space and clear plastic over each of the displays on the 3125.

The entire height of the display section is about 7mm.

I concur that the double LCD portion of the unit is between 3mm and 5mm thick.

"It's okay. The scenarios aren't that clear. But it's good looking. [Steve Jobs] does good design, and [the iPad] is absolutely a good example of that." -- Bill Gates on the Apple iPad
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