E Ink Shows Wafer-Thin Flexible Display
"Electronic paper" screens built on technology that makes them slimmer than LCDs ever could be.
David Legard, IDG News Service
E Ink has demonstrated a range of prototype "electronic paper" display screens with a thickness of just 0.3 millimeters--half the thickness of a credit card, the company said Thursday.
The display is built on a steel foil substrate and is therefore flexible as well as thin, making it suitable for rugged portable displays, E Ink said in a statement.
Traditional active-matrix LCDs are built using two separate sheets of fragile glass and cannot be reduced to less than two millimeters thickness.
Targeted at Cell Phones, PDAs
The first prototype features a 1.6-inch diagonal screen with a resolution of 100 pixels by 80 pixels. This display is aimed at small mobile devices such as smart cards and cell phones, E Ink said in its statement.
A larger prototype aimed at handheld devices such as personal digital assistants has a 3-inch diagonal screen and a resolution of 240 pixels by 160 pixels.
How It Works
E Ink displays use different technology than LCDs used in existing notebook computer screens.
An E Ink display consists of a thin plastic film, which contains millions of tiny microcapsules filled with dark and light particles which carry opposite electric charges. This sheet is bonded to the steel foil substrate. Depending on the direction of an electric field from the steel foil transistor substrate, either the dark or the light particles are drawn to the surface, generating a pixel of that color.
The displays are expected to be launched commercially in 2004, the Cambridge, Massachusetts, company said.
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