Printing Technology with PLZT Light Gate Arrays


PLZT - 5046

Keywords electro-optic printers, light gate arrays, PLZT


Start Date: 01-JUN-90 / Duration: 18 months

[ contact / participants ]


Objectives and Approach

The objective of this project was the evaluation and demonstration of the use of PLZT ceramic light-gate arrays for:

The most important advantage of this electro-optic printing technology in comparison to the competing approaches (laser, LED, thermotransfer, LC array, ink-jet) is the unique combination it allows of several features:

Progress and Results

A 300 dpi prototype light gate array was delivered and evaluated. It was incorporated into a customised system, and its usefulness in halftone photographic colour printing successfully demonstrated, with good uniformity and colour rendering. The device was later fitted into an electro-photographic engine, and the tests demonstrated the feasibility of greyscale pictures using a combination of pulse-width modulation and spacial dithering. The print bar device showed excellent light transmission, a good contrast ration (reaching 38:1), and fast switching properties.

The basic potential of the PLZT technology has been proven by the project, but a revision of the design of the first prototype device (for example, using embedded electrodes to produce a more uniform electrical field) seems necessary. The project has been terminated, but further development by some of the partners is likely.


CONTACT POINT

Mr Johann Springer
STANDARD ELEKTRIK LORENZ AG
Lorenzstr. 10
D - 7000 STUTTGART 40
tel: + 49/ 711-8215920
fax: + 49/ 711-8216355
telex: 41721940 SELRC D

Participants

STANDARD ELEKTRIK LORENZ AG - D - C
OCE-NEDERLAND BV - NL - P
RWTH AACHEN - D - P


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PLZT - 5046, December 1993


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html version of synopsis by Nick Cook