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US4744640A Expired / Lapsed US ⏱️ 0.0 years remaining

PLZT multi-shutter color electrode pattern

Assignee: CTS Corp
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Filing: 1985-08-29
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Granted: 1988-05-17
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Expires: 2005-08-29
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Abstract

Abstract An electro-optic display having either variable-color or selectable-color capability is disclosed, with each having particularly efficient electrode patterns for achieving color control. Each implements a passive display utilizing an electro-optic material such as PLZT having one of these types of electrode patterns and aligned with an appropriate multi-colored filter. By applying D.C. control voltages to these sets of electrodes, which are sufficiently small to form unit cells, variable or selectable color is perceived. The patterns may be arranged in a sequence of any length or width, with the three-shutter pattern featuring no surface-mounted crossovers.

Inventors

  • 👤 James R. Phillips

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 21:15
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/055; G02F1/0551

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 180 words
An improved, electronic shutter arrangement having an electrode pattern for controlling a plurality of light paths passing through an electro-optic substrate and forming a plurality of sequentially positioned unit cells, comprising in combination: electro-optic substrate means responsive to an electric field established between a set of electrodes mounted thereon; a first set of electrodes having a first active and a first common lead for establishing a first electric field; a second set of electrodes having a second active and a second common lead for establishing a second electric field, with said second set interleaved with said first set; and a third set of electrodes having two parts formed by a third active lead interposed in serpentine fashion between said first and second sets of electrodes for establishing a third electric field and interdigitated with said first and second common leads thereof, said first, second, and third sets of electrodes cooperating to form unit cells in positional sequence and wherein each unit cell provides selectively controlled individual light paths having sets of electrodes positionally related to one another without surface-mounted crossovers.
Claim 2
Dependent Claim 180 words
An improved, electronic shutter arrangement having an electrode pattern for controlling a plurality of light paths passing through an electro-optic substrate and forming a plurality of sequentially positioned unit cells, comprising in combination: electro-optic substrate means responsive to an electric field established between a set of electrodes mounted thereon; a first set of electrodes having a first active and a first common lead for establishing a first electric field; a second set of electrodes having a second active and a second common lead for establishing a second electric field, with said second set interleaved with said first set; and a third set of electrodes having two parts formed by a third active lead interposed in serpentine fashion between said first and second sets of electrodes for establishing a third electric field and interdigitated with said first and second common leads thereof, said first, second, and third sets of electrodes cooperating to form unit cells in positional sequence and wherein each unit cell provides selectively controlled individual light paths having sets of electrodes positionally related to one another without surface-mounted crossovers.
Claim 3
Dependent Claim 56 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said light paths correspond to three primary colors formed by an aligned, multi-colored filter and wherein said unit cell is sufficiently small so that a blending of any combination of said three primary colors effects the display of any desired, continuously variable, potentially saturated color.
Claim 4
Dependent Claim 23 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said electro-optic substrate means comprises material of lead, lanthanum, zirconium titanate (PLZT).
Claim 5
Dependent Claim 18 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said sets of electrodes comprise transparent electrodes.
Claim 6
Dependent Claim 21 words
An improved, electronic shutter electrode arrangement according to claim 4, wherein said transparent electrodes comprise a material such as tin oxide.
Claim 7
Dependent Claim 18 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said sets of electrodes comprise opaque electrodes.
Claim 8
Dependent Claim 34 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said sets of electrodes are formed into a line segment having a predetermined length and width as part of a segmented alphanumeric display.
Claim 9
Dependent Claim 39 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said light paths comprise light eminating trom a source of back light located oppositely from a given viewing surface so as to be transmissive through said electro-optic substrate.
Claim 10
Dependent Claim 52 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said light paths comprise light from an ambient source located on the same side as a given viewing surface and having an appropriately reflective back element so as to effect reflective return of said ambient source light through said electro-optic substrate.
Claim 11
Dependent Claim 60 words
An improved, electronic shutter electrode arrangement according to claim 1, wherein said light paths comprise light from an ambient source located on the same side as a given viewing surface in addition to an oppositely located source of back light and having an appropriate partially reflective back element so as to effect transflective passages of light through said electro-optic substrate.
Claim 12
Dependent Claim 225 words
An improved, color display apparatus having an electrode pattern for controlling a plurality of triple color light beams formed by an aligned, triple-colored filter and passing through an electro-optic substrate for forming a plurality of sequentially positioned unit cells, comprising in combination: an electro-optic material such as lead, lanthanum, zirconium titanate (PLZT) responsive to an electric field establishec between a set of electrodes mounted thereon; a first set of electrodes having a first active and a first common lead for establishing a first electric field; a second set of electrodes having a second active and a second common lead for establishing a second electric field, said second set interleaved with said first set; and a third set of electrodes having two parts formed by a third active lead interposed in serpentine fashion between said first and second set of electrodes for establishing a third electric field and interdigitated with said first and second common leads thereof, said first, second, and third sets of electrodes cooperating to form unit cells in positional sequence wherein each unit cell provides selectively controlled individual light paths having sets of electrodes positionally related to one another without surface-mounted crossovers, and wherein said unit cell is sufficiently small so that a blending of any combination of said three primary colors effects the display of any desired, continuously variable, potentially saturated color.
Claim 13
Dependent Claim 225 words
An improved, color display apparatus having an electrode pattern for controlling a plurality of triple color light beams formed by an aligned, triple-colored filter and passing through an electro-optic substrate for forming a plurality of sequentially positioned unit cells, comprising in combination: an electro-optic material such as lead, lanthanum, zirconium titanate (PLZT) responsive to an electric field establishec between a set of electrodes mounted thereon; a first set of electrodes having a first active and a first common lead for establishing a first electric field; a second set of electrodes having a second active and a second common lead for establishing a second electric field, said second set interleaved with said first set; and a third set of electrodes having two parts formed by a third active lead interposed in serpentine fashion between said first and second set of electrodes for establishing a third electric field and interdigitated with said first and second common leads thereof, said first, second, and third sets of electrodes cooperating to form unit cells in positional sequence wherein each unit cell provides selectively controlled individual light paths having sets of electrodes positionally related to one another without surface-mounted crossovers, and wherein said unit cell is sufficiently small so that a blending of any combination of said three primary colors effects the display of any desired, continuously variable, potentially saturated color.
Claim 14
Dependent Claim 232 words
An improved, color display apparatus having an electrode pattern for controlling a plurality of triple color light beams formed by an aligned, triple-colored filter and passing through an electro-optic substrate for forming a plurality of sequentially positioned unit cells, comprising in combination: an electro-optic material such as lead, lanthanum, zirconium titanate (PLZT) responsive to an electric field established between a set of planar interdigitated electrodes mounted thereon; a first set of interdigitated electrodes having a first active and a first common lead for establishing a first electric field; a second set of interdigitated electrodes having a second active and a second common lead for establishing a second electric field, said second set interleaved with said first set; and a third set of interdigitated electrodes having two parts formed by a third active lead interposed in serpentine fashion between said first and second set of electrodes for establishing a third electric field and interdigitated with said first and second common leads thereof, said first, second, and third set of interdigitated electrodes cooperating to form unit cells in positional sequence wherein each unit cell provides selectively controlled individual light paths having sets of interdigitated electrodes positionally related to one another without surface-mounted crossovers, and wherein said unit cell is sufficiently small so that a blending of any combination of said three primary colors effects the display of any desired, continously variable, potentially saturated color.
Claim 15
Dependent Claim 232 words
An improved, color display apparatus having an electrode pattern for controlling a plurality of triple color light beams formed by an aligned, triple-colored filter and passing through an electro-optic substrate for forming a plurality of sequentially positioned unit cells, comprising in combination: an electro-optic material such as lead, lanthanum, zirconium titanate (PLZT) responsive to an electric field established between a set of planar interdigitated electrodes mounted thereon; a first set of interdigitated electrodes having a first active and a first common lead for establishing a first electric field; a second set of interdigitated electrodes having a second active and a second common lead for establishing a second electric field, said second set interleaved with said first set; and a third set of interdigitated electrodes having two parts formed by a third active lead interposed in serpentine fashion between said first and second set of electrodes for establishing a third electric field and interdigitated with said first and second common leads thereof, said first, second, and third set of interdigitated electrodes cooperating to form unit cells in positional sequence wherein each unit cell provides selectively controlled individual light paths having sets of interdigitated electrodes positionally related to one another without surface-mounted crossovers, and wherein said unit cell is sufficiently small so that a blending of any combination of said three primary colors effects the display of any desired, continously variable, potentially saturated color.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-05-17 1991-11-16 1992-05-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-05-17 1995-11-16 1996-05-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-05-17 1999-11-16 2000-05-17 $7700.00 Window Closed / Lapsed

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