Ricoh announces Color Electronic Paper Display with 2.5 times enhanced Brightness and Color Reproducibility

Ricoh utilizing its original display method, has achieved a display of color still images with about 2.5 times brighter (in white reflectivity) and about 4 times wider color reproduction range compared with presently commercialized or announced color electronic paper technologies. Electronic paper, having no luminous source, differs from a conventional display unit-it requires no electric power except for rewriting characters and images. Known as a technology gentle on the environment and the human eye, 6.6 million monochrome devices for reading digital books are now sold annually throughout the world and sales are predicted to exceed 11 million readers in 2011. Although color devices have long been desired, the methods proposed for color electronic paper have thus far not been able to solve the lack of brightness or color reproducibility, even in theory. Therefore the color electronic paper market is expected to grow significantly with future technology development, greatly expanding possible applications.

Based on this result, Ricoh moved from the development phase of element technology to the development of a practical application of prototypes featuring high resolution electronic paper. This led to success in achieving bright images with high color image reproducibility. Ricoh will accelerate development toward practical application by improving reliability/repetition durability (guaranteeing tens of thousands of rewrites) and larger screen size.