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Samsung touts 'first' truly double-sided LCD

Posted: 08 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:LCD? double-sided LCD? mobile display? Samsung? TFT?

Double-sided LCD from Samsung

Samsung Electronics Co. Ltd says it has developed the first LCD panel that can produce independent images on each side of a mobile display. What does this mean? You can see two different pictures or two sets of visual data simultaneously on the front and back of the same screen, compared with conventional double-sided LCDs that only show a reverse image of the same video data.

Thinner mobile products
Samsung believes this new development will replace two display panels with one, thereby reducing overall thickness of mobile products by at least 1mm. In addition, the dual-image LCD's use of light to display images in both transmissive and reflective modes support slimmer designs.

The double-sided LCD screen measures 2.6mm thick and 2.22 inches wide with a QVGA (240-by-320pixel) resolution. It offers brightness values of 250nits for the front and 100nits for the rear display.

The double-sided LCD leverages Samsung's new double-gate TFT architecture and proprietary Amorphous Silicon Gate (ASG) technology, which accommodates the increased number of TFT gates without increasing the size of the driver ICs. The double-sided LCD has two gates that operate each pixel instead of one, so the screen on the front can display different images than the one on the back, said the company. It will be exhibited at the Consumer Electronics Show in Las Vegas this week.

Unique reflective design
In addition, the mobile display requires only one backlight, while competitive double-screen LCDs require two, said the company. One side of the panel operates in a transmissive mode, while the other operates in a reflective mode. By using a unique reflective design that uses the light trapped in the opposing screen's transmissive mode, the reflective mode does not solely rely on external light sources such as the sun, according to the company.

Volume production is expected in the first half of 2007.

- Gina Roos

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