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Issue Date: Vol. 54, No. 8, August 2014, Posted On: 7/18/2014

New LG Displays Are Rollable And See-Through

Nick Montano
TAGS: vending machine, amusement machine, video game, new LG display technologies, LG Display, next-generation OLED, organic light-emitting diode, LG rollable display, LG transparent display

LG displays, vending times

SEOUL -- LG has introduced two display technologies that someday might have applications in vending and amusement equipment designs.

LG Display, which supplies high-tech screens for LG Electronics' smartphones, tablet computers and TVs, said it has developed an 18" transparent screen using next-generation OLED (organic light-emitting diode) technology. This screen is said to be brighter and more energy efficient than an LCD because it does not require a backlight.

The panel boasts 30% transmittance, which was achieved by adopting LG's transparent pixel design technology. Officials noted that the new display lowers the "haze" of the panel, which is caused by tiny circuit devices and film components to a level of 2%, compared with an industry average of 10%. So when it's not powered up, the display is nearly as clear as a windowpane.

LG Display also claimed that it has developed another 18" OLED screen that can be rolled up like a piece of cardboard. The flexible panel offers high-def class resolution (1,200 x 810), almost 1 million megapixels. It can be rolled up to a radius of 3 cm. without affecting its function. LG said this proves the company can bring rollable TVs and other devices of more than 50" to the market in the near future.

LG engineers used high-tensile strength polyimide film as the backplane of the flexible panel, instead of conventional plastic, to achieve the ideal curvature radius. The polyimide film also reduces the thickness of the panel to improve flexibility.

OLED display technology, which has been around for decades, was first used for car radio screens. However, making OLED screens for large, high-definition TVs is difficult due to meticulous manufacturing procedures.

"We are confident that by 2017, we will successfully develop an ultra-HD flexible and transparent OLED panel of more than 60 inches, which will have transmittance of more than 40% and a curvature radius of 100R, thereby leading the future display market" said In-Byung Kang, senior vice-president and head of the R&D center at LG Display.

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