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ELECTRON BEAM DISPLAY TARGET USING EDGE MODE EFFECT

IP.com Disclosure Number: IPCOM000023541D
Original Publication Date: 1978-Feb-28
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 262K

Publishing Venue

Xerox Disclosure Journal

Abstract

A display target, such as that shown above, can be used as a viewing screen for a cathode ray tube. The target comprises a polycrystalline ferroelectric ceramic layer 1 supported by a grounded conductive transparent elec-trode 2 and coated on the side opposite electrode 2 with a pattern of reflective metal islands 3. The ceramic layer 1 is coated onto the transparent conductive side of electrode 2. NESA glass is typically used as electrode 2. PLZT (lead-lanthanum-zirconate-titanate) ceramic is a suitable choice for layer 1, because it can be made to be about 99 percent trans-parent to white light. Reflective metal islands 3 are typically silver.

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XEROX DISCLOSURE JOURNAL

ELECTRON BEAN DISPLAY TARGET
USING EDGE MODE EFFECT
Don L. Camphausen

Proposed Classification
U.S. Cl. 350/167
Int. Cl. G02b 27/00

A display target, such as that shown above, can be used as a
viewing screen for a cathode ray tube.

The target comprises a polycrystalline ferroelectric ceramic
layer 1 supported by a grounded conductive transparent elec-
trode 2 and coated on the side opposite electrode 2 with a
pattern of reflective metal islands 3. The ceramic layer 1 is
coated onto the transparent conductive side of electrode 2.
NESA glass is typically used as electrode 2. PLZT (lead-
lanthanum-zirconate-titanate) ceramic is a suitable choice for
layer 1, because it can be made to be about 99 percent trans-
parent to white light. Reflective metal islands 3 are
typically silver.

Scanning electron beam 4 alters the reflective properties of
portions of ceramic layer 1 when it deposits electrons there-
on. Alteration is in either a voltage variable birefringence,
a voltage induced longitudinal scattering mode or a variable
surface deformation mode.

8/7

3

Volume 3 Number 1 January/February 1978 59

5~r~

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ELECTRON BEAM DISPLAY TARGET USING EDGE MODE EFFECT (Cont'd)

Light 7 from light source 5 is polarized by polarizer 6 and
passes through electrode 2 and ceramic layer 1. Light 7 is
then reflected back from islands 3, and is analyzed at ana-
lyzer 8. The change in reflective properties of portions of...