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Samsung develops flexible 7-inch LCD display

Posted on Tuesday, November 29 2005 @ 00:12:26 CET by

Samsung said that it has developed the world's largest transmissive TFT LCD, with sufficiently high resolution to display digital television content. The seven-inch display has a 640x480 VGA resolution and uses a transparent plastic substrate that is thinner, lighter and more durable than the conventional LCD glass panels used today. Moreover, the full-color transmissive LCD panel maintains a constant thickness even when it is bent.

Considered the next-generation in flat panel displays, this technology involves the use of pliable plastic instead of rigid glass substrates in TFT-LCD production. The plastic will not break when flexed, allowing much greater freedom in commercial designs requiring flexible full-color, high-resolution display components. The seven-inch flexible TFT-LCD is optimized for mobility applications, including cell phones and notebook computers. System designers and OEMs also may apply the advanced Samsung display technology to new applications, such as fashion-enhancing or wearable electronic display designs, thanks to its differentiated flexible format.

The new display is double the size of Samsung's five-inch flexible LCD display prototype announced in January 2005.

With this advancement, Samsung has overcome daunting problems involving the plastic substrate's heat sensitivity including a previous challenge to maintain the display's substrate thickness when subjected to typical commercial thermal conditions. Samsung developed a low-temperature processing technique that can be used to manufacture the display's amorphous thin-film transistors, color filters and liquid crystals at process temperatures much lower than standard glass-based, amorphous silicon (a-Si) technology.

Drawing on technology adopted for the production of low-temperature (less than 130 degrees Celsius) a-Si TFT LCD and color filter, Samsung's proprietary LCD technology minimizes substrate deformation by preventing not only changes in thickness but also distortion of images by binding two extremely-thin panels together through a new proprietary system design.

The latest flexible LCD panel was developed under a three-year program funded by Samsung Electronics' next-generation display development group under the auspices of the Korean Ministry of Commerce, Industry and Energy, supported by Samsung's Corporate Research Fund.

Samsung 7" a-Si TFT-LCD model specifications:
  • Display Mode: Transmissive
  • Screen Size (diagonal): 7 inches"
  • Resolution: 640 x 480 x RBG (114 ppi)
  • Aperture Ratio: 40 percent
  • Brightness: 100 nit
  • Color Saturation: 60 percent (of NTSC)



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