WO2007023406A2 - Anti-blooming structures for laminated displays - Google Patents

Anti-blooming structures for laminated displays Download PDF

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Publication number
WO2007023406A2
WO2007023406A2 PCT/IB2006/052755 IB2006052755W WO2007023406A2 WO 2007023406 A2 WO2007023406 A2 WO 2007023406A2 IB 2006052755 W IB2006052755 W IB 2006052755W WO 2007023406 A2 WO2007023406 A2 WO 2007023406A2
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WO
WIPO (PCT)
Prior art keywords
pixel
patch
pad
conductive glue
display
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Application number
PCT/IB2006/052755
Other languages
French (fr)
Other versions
WO2007023406A3 (en
Inventor
Pieter Van Lieshout
Edzer Huitema
Alex Henzen
Original Assignee
Koninklijke Philips Electronics, N.V.
U.S. Philips Corporation
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Application filed by Koninklijke Philips Electronics, N.V., U.S. Philips Corporation filed Critical Koninklijke Philips Electronics, N.V.
Publication of WO2007023406A2 publication Critical patent/WO2007023406A2/en
Publication of WO2007023406A3 publication Critical patent/WO2007023406A3/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133354—Arrangements for aligning or assembling substrates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis

Definitions

  • the present invention generally relates to a laminated display.
  • the present invention specifically relates to a structural configuration of a front plane of a laminated display that minimizes blooming effects among pixels in the laminated display.
  • FIG. IA illustrates a display 10 employing a front plane 20 and a back plane 30.
  • Front plane 20 includes a top substrate 21, a top electrode 22, a cell having ink capsules 23, and a conductive glue layer 24.
  • Back plane 30 includes pixel pads 32 and a bottom substrate 31.
  • Conductive glue layer 24 is used to laminate front plane 20 onto back plane 30.
  • pixel pads 32 are spaced from each other to facilitate an operable segregation of electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 22 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 10 can be achieved.
  • the electrical active areas of the pixels defined by pixel pads 32 experience a blooming effect due to a lateral conductivity by conductive glue layer 24.
  • an electrical active area 33(1) of the pixel defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably integrated due to a lateral conductivity by conductive glue layer 24.
  • This undesirable blooming effect results in a reduction in a spatial resolution of display 10, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 20.
  • a back plane includes a plurality of pixel pads and a front plane includes a plurality of anti-blooming pixel patches, each patch being operable to be in electrical communication with one of the pixel pads.
  • the anti-blooming pixel patches are operably segregated from each other to facilitate an operable segregation of electrical active areas of pixels defined by the pixel pads.
  • each anti-blooming pixel patch can include an operably segregated conductive glue patch to facilitate the operable segregation of the electrical active areas of pixels defined by the pixel pads.
  • the glue patches can include an anisotropic material and non-conductive glue patches can be utilized to operably segregate the conductive glue patches.
  • each anti-blooming patch is formed from a conductive glue layer of the front plane having an anisotropic material.
  • FIG. 2 illustrates anti-blooming pixel patches for a front plane of a laminated display in accordance with the present invention
  • FIGS. 3 A and 3B illustrate a first embodiment of a laminated display in accordance with the present invention
  • FIGS. 4 A and 4B illustrate a second embodiment of a laminated display in accordance with the present invention.
  • FIGS. 5A and 5B illustrate a third embodiment of a laminated display in accordance with the present invention.
  • one inventive principle of the present invention is to structurally divide the front plane, partially or entirely, into anti-blooming pixel patches that prevent any type of lateral conduction within the front plane to thereby sustain an operable segregation of the electrical active areas of pixels defined by the pixel pads of the back plane.
  • FIG. 2 illustrates anti-blooming pixel patches 40 for facilitating an operable segregation of the electrical active areas 33 of the pixels defined by the pixel pads 32 of the back plane 30.
  • a patch size and/or a patch shape of anti-blooming pixel patches 40 can be identical to a pad size and/or a pad shape of pixel pads 32.
  • Another inventive principle of the present invention is to utilize an anisotropically conductive glue layer to establish and/or enhance the structural division of the front plane, partially or entirely, into anti-blooming pixel patches.
  • the present invention does not impose any limitations or any restrictions as to the manner by which a front plane is structurally divided, partially or entirely, into anti- blooming pixel patches to prevent any type of lateral conduction within the front plane to thereby sustain an operable segregation of the pixel pads of the back plane.
  • the following description of several embodiments of a laminated display in accordance with the present invention does not impose any limitations or any restrictions as to the manner by which a front plane is structurally divided, partially or entirely, into anti-blooming pixel patches to prevent any type of lateral conduction within the front plane.
  • FIG. 3A illustrates a display 11 employing a front plane 50 and back plane 30.
  • Front plane 50 includes a top substrate 51, a top electrode 52, a cell having ink capsules 53, and an anti-blooming pixel layer including a pair of conductive glue patches 54 with a non- conductive glue patch 55 operably segregating conductive glue patches 54 whereby conductive glue patches 54 define a pair of anti-blooming pixel patches.
  • Glue layers 54 and 55 are used to laminate front plane 50 onto back plane 30 with conductive glue layer 54(1) being operably aligned with pixel pad 32(1) and conductive glue layer 54(2) being operably aligned with pixel pad 32(2).
  • a patch size and/or a patch shape of conductive glue layer 54(1) are identical to a pad size and/or a pad shape of pixel pad 32(1), and a patch size and/or a patch shape of conductive glue layer 54(2) are identical to a pad size and/or a pad shape of pixel pad 32(2).
  • pixel pads 32 are spaced from each other to facilitate an operable segregation of the electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 52 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 11 can be achieved.
  • the electrical active areas of the pixels defined by pixel pads 32 do not experience any significant blooming effect due to an absence of any lateral conductivity between the anti-blooming pixel patches.
  • an electrical active area 33(1) of the pixel defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably segregated due to the lack of any lateral conductivity between conductive glue patches 54.
  • a such a desirable spatial resolution of display 11 can be achieved, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 50 is prevented.
  • conductive glue patches to enhance the advantage of the anti-blooming pixel patches.
  • 54 can include anisotropic material. - A -
  • FIG. 4A illustrates a display 12 employing a front plane 60 and back plane 30.
  • Front plane 60 includes a top substrate 61, a top electrode 62, and anti-blooming pixel layer including a cell having ink capsules 63 with a non-conductive filler 66 operably segregating a cell patch of ink capsules 63(l)-63(3) and a cell patch of ink capsules 63(4)-63(6).
  • the anti- blooming pixel layer further includes a pair of conductive glue patches 64 with a non- conductive glue patch 65 operably segregating conductive glue patches 64.
  • the cell patch of ink capsules 63(l)-63(3) and conductive glue patch 64(1) define one anti-blooming pixel patch
  • the cell patch of ink capsules 63(4)-63(5) and conductive glue patch 64(2) define another anti-blooming pixel patch.
  • Glue layers 64 and 65 are used to laminate front plane 60 onto back plane 30 with conductive glue layer 64(1) being operably aligned with pixel pad 32(1) and conductive glue layer 64(2) being operably aligned with pixel pad 32(2).
  • a patch size and/or a patch shape of conductive glue layer 64(1) are identical to a pad size and/or a pad shape of pixel pad 32(1), and a patch size and/or a patch shape of conductive glue layer 64(2) are identical to a pad size and/or a pad shape of pixel pad 32(2).
  • pixel pads 32 are spaced from each other to facilitate an operable segregation of the electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 62 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 12 can be achieved.
  • the electrical active areas of the pixels defined by pixel pads 32 do not experience any significant blooming effect due to an absence of any lateral conductivity between the anti-blooming pixel patches. Specifically, as shown in FIG.
  • an electrical active area 33(1) of defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably segregated due to the lack of any lateral conductivity between the cell patch of ink capsules 63(l)-63(3) and conductive glue patch 64(1), and the cell patch of ink capsules 63(4)-63(5) and conductive glue patch 64(2).
  • a such a desirable spatial resolution of display 12 can be achieved, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 60 is prevented.
  • conductive glue patches 64 can include anisotropic material.
  • FIG. 5 A illustrates a display 13 employing a front plane 70 and back plane 30.
  • Front plane 70 includes a top substrate 71, a top electrode 72, a cell having ink capsules 73, and anti-blooming pixel layer in the form of an anisotropic conductive glue layer 74 for laminating front plane 70 onto back plane 30.
  • the portions of anisotropic conductive glue layer 74 operably aligned with pixel pads 32 define a pair of anti-blooming pixel patches.
  • pixel pads 32 are spaced from each other to facilitate an operable segregation of the electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 72 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 13 can be achieved.
  • the electrical active areas of the pixels defined by pixel pads 32 do not experience any significant blooming effect due to an absence of any lateral conductivity along an entirety of glue layer 74.
  • an electrical active area 33(1) of defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably segregated due to the lack of any lateral conductivity along an entirety of glue patch 74.
  • FIGS. 1 and 3-5 displays 10-13 were shown with minimal pixel pads and ink capsules to facilitate a straightforward description of the inventive principles of the present invention. In practice, those having ordinary skill in the art will appreciate how to apply the inventive principles of the present invention to displays having numerous pixels pads, cells having numerous ink capsules or the like, and/or other front plane layers (e.g., a color filter layer).

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

A display comprises a back plane (30) and a front plane laminated to the back plane (30). The back plane (30) include a plurality of pixel pads (32) and the front plane includes a plurality of anti-blooming pixel patches (40), each patch (40) being operable to be in electrical communication with one of the pixel pads (32). The anti-blooming pixel patches (40) are operably segregated from each other to facilitate an operable segregation of electrical active areas (33) of pixels defined by the pixel pads (32). Each anti-blooming pixel patch (40) can include an operably segregated conductive glue patch (54, 64) to facilitate the operable segregation of the electrical active areas (33) of pixels defined by the pixel pads (32). The glue patches (54, 64) can include an anisotropic material. Alternatively, the anti-blooming patches (40) can be formed from a conductive glue layer (74) having an anisotropic material.

Description

ANTI-BLOOMING STRUCTURES FOR LAMINATED DISPLAYS
The present invention generally relates to a laminated display. The present invention specifically relates to a structural configuration of a front plane of a laminated display that minimizes blooming effects among pixels in the laminated display.
FIG. IA illustrates a display 10 employing a front plane 20 and a back plane 30. Front plane 20 includes a top substrate 21, a top electrode 22, a cell having ink capsules 23, and a conductive glue layer 24. Back plane 30 includes pixel pads 32 and a bottom substrate 31. Conductive glue layer 24 is used to laminate front plane 20 onto back plane 30. By design of back plane 30, pixel pads 32 are spaced from each other to facilitate an operable segregation of electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 22 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 10 can be achieved. However, in operation, the electrical active areas of the pixels defined by pixel pads 32 experience a blooming effect due to a lateral conductivity by conductive glue layer 24. Specifically, as shown in FIG. IB, an electrical active area 33(1) of the pixel defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably integrated due to a lateral conductivity by conductive glue layer 24. This undesirable blooming effect results in a reduction in a spatial resolution of display 10, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 20.
To overcome this drawbacks with such displays, the present invention provides a new structural configuration for the front plane that facilitates a complete operably segregation of the electrical active areas of the pixels defined by the pixel pads of the back plane. In one form of a laminated display of the present invention, a back plane includes a plurality of pixel pads and a front plane includes a plurality of anti-blooming pixel patches, each patch being operable to be in electrical communication with one of the pixel pads. The anti-blooming pixel patches are operably segregated from each other to facilitate an operable segregation of electrical active areas of pixels defined by the pixel pads. In one aspect of the anti-blooming pixel patch, each anti-blooming pixel patch can include an operably segregated conductive glue patch to facilitate the operable segregation of the electrical active areas of pixels defined by the pixel pads. The glue patches can include an anisotropic material and non-conductive glue patches can be utilized to operably segregate the conductive glue patches. In another aspect of the anti-blooming pixel patches, each anti-blooming patch is formed from a conductive glue layer of the front plane having an anisotropic material. The foregoing form and other forms of the present invention as well as various features and advantages of the present invention will become further apparent from the following detailed description of various embodiments of the present invention read in conjunction with the accompanying drawings. The detailed description and drawings are merely illustrative of the present invention rather than limiting, the scope of the present invention being defined by the appended claims and equivalents thereof. FIGS. IA and IB illustrate a laminated display as known in the art;
FIG. 2 illustrates anti-blooming pixel patches for a front plane of a laminated display in accordance with the present invention;
FIGS. 3 A and 3B illustrate a first embodiment of a laminated display in accordance with the present invention; FIGS. 4 A and 4B illustrate a second embodiment of a laminated display in accordance with the present invention; and
FIGS. 5A and 5B illustrate a third embodiment of a laminated display in accordance with the present invention.
To prevent a blooming effect among pixels defined by the pixels pads of back plane, one inventive principle of the present invention is to structurally divide the front plane, partially or entirely, into anti-blooming pixel patches that prevent any type of lateral conduction within the front plane to thereby sustain an operable segregation of the electrical active areas of pixels defined by the pixel pads of the back plane. For example, FIG. 2 illustrates anti-blooming pixel patches 40 for facilitating an operable segregation of the electrical active areas 33 of the pixels defined by the pixel pads 32 of the back plane 30. In one embodiment, a patch size and/or a patch shape of anti-blooming pixel patches 40 can be identical to a pad size and/or a pad shape of pixel pads 32.
Another inventive principle of the present invention is to utilize an anisotropically conductive glue layer to establish and/or enhance the structural division of the front plane, partially or entirely, into anti-blooming pixel patches.
In practice, the present invention does not impose any limitations or any restrictions as to the manner by which a front plane is structurally divided, partially or entirely, into anti- blooming pixel patches to prevent any type of lateral conduction within the front plane to thereby sustain an operable segregation of the pixel pads of the back plane. Thus, the following description of several embodiments of a laminated display in accordance with the present invention does not impose any limitations or any restrictions as to the manner by which a front plane is structurally divided, partially or entirely, into anti-blooming pixel patches to prevent any type of lateral conduction within the front plane.
FIG. 3A illustrates a display 11 employing a front plane 50 and back plane 30. Front plane 50 includes a top substrate 51, a top electrode 52, a cell having ink capsules 53, and an anti-blooming pixel layer including a pair of conductive glue patches 54 with a non- conductive glue patch 55 operably segregating conductive glue patches 54 whereby conductive glue patches 54 define a pair of anti-blooming pixel patches. Glue layers 54 and 55 are used to laminate front plane 50 onto back plane 30 with conductive glue layer 54(1) being operably aligned with pixel pad 32(1) and conductive glue layer 54(2) being operably aligned with pixel pad 32(2). In one embodiment, a patch size and/or a patch shape of conductive glue layer 54(1) are identical to a pad size and/or a pad shape of pixel pad 32(1), and a patch size and/or a patch shape of conductive glue layer 54(2) are identical to a pad size and/or a pad shape of pixel pad 32(2).
By design of back plane 30, pixel pads 32 are spaced from each other to facilitate an operable segregation of the electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 52 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 11 can be achieved. In operation, the electrical active areas of the pixels defined by pixel pads 32 do not experience any significant blooming effect due to an absence of any lateral conductivity between the anti-blooming pixel patches. Specifically, as shown in FIG. 3B, an electrical active area 33(1) of the pixel defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably segregated due to the lack of any lateral conductivity between conductive glue patches 54. A such, a desirable spatial resolution of display 11 can be achieved, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 50 is prevented. To enhance the advantage of the anti-blooming pixel patches, conductive glue patches
54 can include anisotropic material. - A -
FIG. 4A illustrates a display 12 employing a front plane 60 and back plane 30. Front plane 60 includes a top substrate 61, a top electrode 62, and anti-blooming pixel layer including a cell having ink capsules 63 with a non-conductive filler 66 operably segregating a cell patch of ink capsules 63(l)-63(3) and a cell patch of ink capsules 63(4)-63(6). The anti- blooming pixel layer further includes a pair of conductive glue patches 64 with a non- conductive glue patch 65 operably segregating conductive glue patches 64. The cell patch of ink capsules 63(l)-63(3) and conductive glue patch 64(1) define one anti-blooming pixel patch, and the cell patch of ink capsules 63(4)-63(5) and conductive glue patch 64(2) define another anti-blooming pixel patch. Glue layers 64 and 65 are used to laminate front plane 60 onto back plane 30 with conductive glue layer 64(1) being operably aligned with pixel pad 32(1) and conductive glue layer 64(2) being operably aligned with pixel pad 32(2). In one embodiment, a patch size and/or a patch shape of conductive glue layer 64(1) are identical to a pad size and/or a pad shape of pixel pad 32(1), and a patch size and/or a patch shape of conductive glue layer 64(2) are identical to a pad size and/or a pad shape of pixel pad 32(2).
By design of back plane 30, pixel pads 32 are spaced from each other to facilitate an operable segregation of the electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 62 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 12 can be achieved. In operation, the electrical active areas of the pixels defined by pixel pads 32 do not experience any significant blooming effect due to an absence of any lateral conductivity between the anti-blooming pixel patches. Specifically, as shown in FIG. 4B, an electrical active area 33(1) of defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably segregated due to the lack of any lateral conductivity between the cell patch of ink capsules 63(l)-63(3) and conductive glue patch 64(1), and the cell patch of ink capsules 63(4)-63(5) and conductive glue patch 64(2). A such, a desirable spatial resolution of display 12 can be achieved, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 60 is prevented.
To enhance the advantage of the anti-blooming pixel patches, conductive glue patches 64 can include anisotropic material.
FIG. 5 A illustrates a display 13 employing a front plane 70 and back plane 30. Front plane 70 includes a top substrate 71, a top electrode 72, a cell having ink capsules 73, and anti-blooming pixel layer in the form of an anisotropic conductive glue layer 74 for laminating front plane 70 onto back plane 30. The portions of anisotropic conductive glue layer 74 operably aligned with pixel pads 32 define a pair of anti-blooming pixel patches.
By design of back plane 30, pixel pads 32 are spaced from each other to facilitate an operable segregation of the electrical active areas of pixels defined by pixel pads 32 in response to a voltage differential between electrode 72 and one or both pixel pads 32 whereby a desired optical spatial resolution of display 13 can be achieved. In operation, the electrical active areas of the pixels defined by pixel pads 32 do not experience any significant blooming effect due to an absence of any lateral conductivity along an entirety of glue layer 74. Specifically, as shown in FIG. 5B, an electrical active area 33(1) of defined by pixel pad 32(1) and an electrical active area 33(2) of the pixel defined by pixel pad 32(2) are operably segregated due to the lack of any lateral conductivity along an entirety of glue patch 74. A such, a desirable spatial resolution of display 13 can be achieved, and optical crosstalk between any colored sub-pixels (not shown) employed by front plane 70 is prevented. Referring to FIGS. 1 and 3-5, displays 10-13 were shown with minimal pixel pads and ink capsules to facilitate a straightforward description of the inventive principles of the present invention. In practice, those having ordinary skill in the art will appreciate how to apply the inventive principles of the present invention to displays having numerous pixels pads, cells having numerous ink capsules or the like, and/or other front plane layers (e.g., a color filter layer).
Referring to FIGS. 2-5, those having ordinary skills in the art will appreciate numerous advantages of the present invention including, but not limited to, addressing the drawbacks of the background art previously described herein.
Embodiments of the present invention have been described above by way of example only, and it will be apparent to a person skilled in the art that modifications and variations can be made to the described embodiments without departing from the scope of the invention as defined by the appended claims. Further, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The term "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The terms "a" or " an" does not exclude a plurality. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a device claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The mere fact that measures are recited in mutually different independent claims does not indicate that a combination of these measures cannot be used to advantage.

Claims

Claims
1. A display, comprising: a back plane (30) including a first pixel pad (32) and a second pixel pad (32); and a front plane laminated to the back plane (30), the front plane including: a first anti-blooming pixel patch (40) operable to be in electrical communication with the first pixel pad (32); and a second anti-blooming pixel patch (40) operable to be in electrical communication with the second pixel pad (32), wherein the second anti-blooming pixel patch (40) is operably segregated from the first anti-blooming pixel patch (40) to facilitate an operable segregation of a first electrical active area (33) of a first pixel defined by the first pixel pad (32) and a second electrical active area (33) of a second pixel defined by the second pixel pad (32).
2. The display of claim 1 , wherein a pad size of the first pixel pad (32) and a patch size of the first anti-blooming pixel patch (40) are identical.
3. The display of claim 1 , wherein a pad shape of the first pixel pad (32) and a patch shape of the first anti-blooming pixel patch (40) are identical.
4. The display of claim 1 , wherein the first anti-blooming pixel patch (40) includes a first conductive glue patch (54, 64) laminating the first anti-blooming pixel patch (40) to the back plane (30); and wherein the second anti-blooming pixel patch (40) includes a second conductive glue patch (54, 64) laminating the second anti-blooming pixel patch (40) to the back plane (30).
5. The display of claim 4, wherein the front plane (50, 60) further includes a non- conductive glue patch (55, 65) operably segregating the first conductive glue patch (54, 64) and the second conductive glue patch (54, 64) to facilitate the operable segregation of the first electrical active area (33) of the first pixel defined by the first pixel pad (32) and the second electrical active area (33) of the second pixel defined by the second pixel pad (32).
6. The display of claim 4, wherein a pad size of the first pixel pad (32) and a patch size of the first conductive glue patch (54, 64) are identical.
7. The display of claim 4, wherein a pad shape of the first pixel pad (32) and a patch shape of the first conductive glue patch (54, 64) are identical.
8. The display of claim 4, wherein the first conductive glue patch (54, 64) includes anisotropic material.
9. The display of claim 4, wherein the first conductive patch (54, 64) is operably aligned with the first pixel pad (32); and wherein the second conductive patch (54, 64) is operably aligned with the second pixel pad (32).
10. The display of claim 4, wherein the front plane (60) further includes: a first cell patch (63) operable to be in electrical communication with the first conductive glue patch (64); and a second cell patch (63) operable to be in electrical communication with the second conductive glue patch (64).
11. The display of claim 10, wherein the front plane (60) further includes a non- conductive filler (66) operably segregating the first cell patch (63) and the second cell patch (63) to further facilitate the operable segregation of the first electrical active area (33) of the first pixel defined by the first pixel pad (32) and the second electrical active area (33) of the second pixel defined by the second pixel pad (32).
12. The display of claim 10, wherein the first cell patch (63) is operably aligned with the first conductive glue patch (64); and wherein the second cell patch (63) is operably aligned with the second conductive patch (64).
13. The display (13) of claim 1 , wherein the front plane (70) further includes a conductive glue layer (74) operable to be in electrical communication with the first pixel (32) and the second pixel pad (32); wherein a first portion of the conductive glue layer (74) operably aligned with the first pixel pad (32) constitutes at least a portion of the first anti-blooming pixel patch (40); wherein a second portion of the conductive glue layer (74) operably aligned with the first pixel pad (32) constitutes at least a portion of the first anti-blooming pixel patch (40); and wherein the conductive glue layer (74) includes an anisotropic material to facilitate the operable segregation of the first electrical active area (33) of the first pixel defined by the first pixel pad (32) and the second electrical active area (33) of the second pixel defined by the second pixel pad (32).
14. A display, comprising: a back plane (30) including a first pixel pad (32) and a second pixel pad (32); and a front plane (50, 60) including a glue layer laminating the front plane to the back plane (30), wherein the glue layer includes: a first conductive glue patch (54, 64) operable to be in electrical communication with the first pixel pad (32); a second conductive glue patch (54, 64) operable to be in electrical communication with the second pixel pad (32); and a non-conductive glue patch (55, 65) operably segregating the first conductive glue patch (54, 64) and the second conductive glue patch (54, 64) to facilitate an operable segregation of a first electrical active area (33) of a first pixel defined by the first pixel pad (32) and a second electrical active area (33) of a second pixel defined by the second pixel pad (32).
15. The display of claim 14, wherein a pad size of the first pixel pad (32) and a patch size of the first conductive glue patch (54, 64) are identical.
16. The display of claim 14, wherein a pad shape of the first pixel pad (32) and a patch shape of the first conductive pixel pad (54, 64) are identical.
17. The display of claim 14, wherein the first conductive glue patch (54, 64) includes anisotropic material.
18. The display of claim 14, wherein the first conductive patch (54, 64) is operably aligned with the first pixel pad (32); and wherein the second conductive patch (54, 64) is operably aligned with the second pixel pad (32).
19. The display (12) of claim 11, wherein the front plane (60) further includes a cell layer including: a first cell patch (63) operable to be in electrical communication with the first conductive glue patch (64); a second cell patch (63) operable to be in electrical communication with the second conductive glue patch (64); and a non-conductive filler (66) operably segregating the first cell patch (63) and the second cell patch (63).
20. The display of claim 19, wherein the first cell patch (63) is operably aligned with the first conductive glue patch (64); and wherein the second cell patch (63) is operably aligned with the second conductive patch (64).
PCT/IB2006/052755 2005-08-22 2006-08-09 Anti-blooming structures for laminated displays WO2007023406A2 (en)

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