Рубрика:
48
The principle is the same for three superimposed patterns, except that one fiber is
taken out of three for each pattern. When the weaving is sufficiently tight, a visual
impression is given of full, enlightened zones. Chain wires will be able to help
diffuse the light toward the dark zones between lightened segments. The number of
rows to be produced seems limited by the technique, insofar as, on the same unit
zone, more dark zones are produced than lightened ones. The appreciation of the
definition will then be based on the size of the pixels and the screen, in addition to the
distance from which people watch the screen.
Various light sources can be used to feed the matrix. The choice mainly
depends on the number of fibers connected to each source and the level of power
consumption. For the first prototypes, we used high luminous LEDs that are 3 mm in
diameter. LED technology has many advantages, as diodes can be easily driven by
electronics under low voltages (2V to 4V, depending on the color). Therefore, many
"light effects" can be generated on the display, such as flashing or varying the
intensity of the light, providing all kinds of animated movies.
The very first OFFD was displayed on a jacket. It comprises a screen matrix
specially designed to display on one line three 60 mm x 60 mm alphanumeric
characters, each made up of three rows and three columns using 0.5 mm diameter
optical fibers and a 7 fibers/cm width density. Each pixel is composed of four fiber
segments and is controlled by one LED located in the lining of the cloth, on one side
of the OFFD. The color of the pixels is determined by the corresponding LEDs.
OFFDs offer another possibility: Although the definition is limited by the
number of rows, it is possible to repeat on fabric the same line of characters or
patterns in the direction imposed by optical fibers. The fixed or animated pattern
reproduction can be used for purely decorative applications; for example, to create a
mural tapestry adapting its colors to the clothes worn by the occupants of a room.
Implications and applications
Optical fiber screens provide access to simple and animated visual information,
such as texts or pictograms. It is possible to download, create or exchange visuals via
the appropriate Internet gateway. Conceivably, images or text could be sent using
wireless technology from a computer or a mobile Internet terminal to an article of
clothing.
The main functions of the new prototypes are:
• To "be seen," for security, publicity, recreational or aesthetic purposes
• To show one's affiliation or support for a group
• To personalize one's clothing according to the latest fashions
• To communicate or exchange information or to signpost advice.
Fabrics based on flexible display technology have the obvious potential to influence
fashion designers, but they have a variety of other useful applications as well. OFFDs
can be used as displays for mobile phones, PDAs (personal digital assistants),
wearable computers and other portable electronic devices.
Notes:
• loom - 1) ткацкий станок 2) ткачество
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