About E-paper display (EPD)
About E-paper disply EPD:
E-Paper displays or electronic paper displays are display technologies that mimic the appearance of ordinary ink on paper. Unlike conventional backlit flat panel displays that emit light, electronic paper displays reflect light like paper. This may make them more comfortable to read, and provide a wider viewing angle than most light-emitting displays. The contrast ratio in electronic displays available as of 2008 approaches newspaper, and newly developed displays are slightly better. An ideal e-paper display can be read in direct sunlight without the image appearing to fade. Also, electronic paper technologies hold static text and images indefinitely without electricity. Flexible electronic paper uses plastic substrates and plastic electronics for the display backplane.
E-paper display technology mode is commonly referred to as "bi-stable" mode. What does this mean? Bi-stable means that the image on an e-paper display will be retained even when all power sources are removed. In practice, this means that the display consumes power only when refreshing. For example, when reading on an e-reader, there is no power consumption for the image to display. Power is only needed when turning from this page to a new page. This is most noticeable that when an e-reader goes into sleep mode yet there is still an image being displayed. By contrast, for a traditional LCD, the display is needed to be refreshing around 30X per second regardless of the whether anything new is being displayed. Bi-stability significantly reduces the power consumption of e-paper display and it is the key reason why e-readers have such long battery life.
E-paper displays are also referred to as "reflective displays." In an LCD or "emissive display", light from a backlight is projected through the display towards your eyes. For an E-paper display, no backlight is needed; rather, ambient light from the environment is reflected from the surface of the display to your eyes. For any reflective surface, the more ambient light, the brighter the display looks. This attribute mimics traditional ink and paper, and users of e-paper displays may be more comfortable when reading for long time. The backlight can also consume up to 40% of the power used in electronic product. Therefore, eliminating the need for a backlight significantly increases the battery life and increasing the experiencing of reading.
Applications of e-paper displays include electronic pricing labels (ESL) in retail shops, digital signage, timetables at bus stations, electronic billboards, mobile phone displays, electronic watch, electronic bracelet, electronic covers, electronic wallpaper and e-readers able to display digital versions of books, e-paper magazines and etc.
DKE are now providing monochromatic EPD as well as 3 color (Black, White and Red) EPD for clients. Besides providing a range of standard dot matrix EPDs, DKE also provides customization services, mostly on Segmented EPD.