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E-paper display features improved color brightness

Posted: 09 Jul 2007 ?? ?Print Version ?Bookmark and Share

Keywords:color e-paper display? color filters? color displays?

Aiming to accelerate the end-user adoption of e-paper display products, Nemoptic has launched a new version of color e-paper displays designed for electronic shelf labels, PoS terminals, e-newspapers, e-magazines and electronic toys. E-paper display technology features all the attributes of paper but the content can be displayed and erased electronically.

The BiNem Demonstrator (BD) 1000 uses a RGBW (red-green-blue-white) color filter. Earlier prototypes of BiNem color e-paper displays were processed using basic RGB color filters, which lead to limited brightness at acceptable color saturation. As a result of switching to RGBW color filters, Nemoptic's BD 1000 has improved brightness up to 20 percent while maintaining the same color saturation level.

The BD 1000 product also features fine subpixel size of 127-by-127?m for each subpixel (red, green, blue or white), leading to a resolution of 100dpi, considered high for bistable color displays. BD 1000 also offers 16 up to 1 million colors (16 colors corresponds to 24 in on/off writing mode and 324 corresponds to 1M colors in 32 grey scales mode). The active area of the color display measures 107.2-by-73.2mm, resulting in a 129.8mm or 5.1-inch diagonal for a 300x400xRGBW image.

"Nemoptic is preparing to address new high value-added e-paper applications, such as e-magazines, that will require color," said Jacques Noels, Nemoptic CEO. "The emerging demand for e-paper products makes it all the more important to be able to mass-produce color displays, which we are aiming to achieve by year end."

BD 1000 is currently being produced on Nemoptic's pilot line in Sweden, using standard production processes and industrial color filters. "We are using similar manufacturing processes for both black & white and color BiNem LCDs, which makes production very cost-effective," concluded Noels.

The BD 1000 e-paper was showcased at the Society for Information Display 2007 International Symposium last May.

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