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Medical LCD modules deliver 950cd/m? luminance

Posted: 25 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:amorphous-silicon TFT LCD modules? medical use? UXGA? QXGA?


NEC LCD Technologies has introduced two new 54cm-diagonal amorphous-silicon TFT LCD modules for medical applications such as the display of radiograms for the interpretation and diagnosis of illness.

The NL160120AC27-20 is an ultra-extended graphics array (UXGA) resolution TFT LCD module with brightness of 950cd/m?, and the NL204153AC21-09 is a quad extended graphics array (QXGA) resolution TFT LCD module with brightness of 800cd/m?. Both of the new color products achieve industry-leading luminance in each resolution category by NEC LCD Technologies' proprietary ultra-advanced, super-fine TFT (UA-SFT) technology and a new high-intensity, direct backlight system. Well suited for medical image diagnosis, the modules also realize high picture performance with ultrawide viewing angles, a high contrast ratio and high brightness uniformity.

Main features
The new models are said to offer industry-leading high luminance. Through the use of proprietary UA-SFT technology, which ups optical transmittance by 20 percent compared with SA-SFT technology, combined with the new high-intensity direct backlight system and further enhanced LCD panel design, the NL160120AC27-20 achieves high luminance of 950cd/m?, twice that of the conventional product. The NL204153AC21-09 has QXGA resolution that is equivalent to about 1.6x the density (area ratio) of the NL160120AC27-20 and attains high luminance of 800cd/m?. Although both of the new products are color models they achieve a dynamic range of luminance, which has been conventionally difficult to attain along with high density and color, thus enabling the smooth and precise reproduction of grayscale required for medical image diagnosis.

A review in panel design, including adoption of UA-SFT technology, has improved the LCD panel's ability to prevent the leakage of light leading to enhanced black display. As a result, the NL160120AC27-20 and the NL204153AC21-09 realize high contrasts of 800:1 and 750:1, respectively. Moreover, optimization of the optical design inhibits a "washed-out black" phenomenon that occurs when the viewing angle is enlargedcurrently a common issue with in-plane switching (IPS) type LCD modules, leading to enhanced viewing angle performance of the contrast ratio.

Enhancement of the entire optical design of the LCD module, including the LCD panel and the backlight system, enabled a reduction in the screen brightness difference, realizing a higher level of brightness uniformity than the conventional product, NL160120AC27-05. Higher brightness uniformity has been long sought after in medical image diagnosis.

"The LCD needs of the medical field have become increasingly complicated and sophisticated as use increases," said Masaaki Hiroshima, product planning department manager, NEC LCD Technologies. "We have strive to fulfill these increasingly diverse needs by continuing to enable high quality images and ultrawide viewing angles to enable our modules to be adopted even more widely by medical equipment manufacturers worldwide. By further enhancing luminance, both of our new color LCD products can be used for X-ray interpretation and PACS Viewer use simultaneously, eliminating the need for two separate monitors to provide further convenience to the medical community."

Samples will be available by end of November. Pricing and availability are subject to change. Both modules will be displayed at FPD International 2007 at the Pacifico Yokohama in Japan, from Oct. 24-26.

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